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CH438L (LQFP-128(14x14)) — Symbol, Footprint IPC-7351B & 3D STEP Model

CH438L

WCHID: C2685239LQFP-128(14x14) · 128 Pins · Pitch 0.40mmIPC-7351B Verified5.0 (0)
SYNCHRONIZED 4D CROSS-PROBE MODETouch or hover any pin to highlight concurrently across Symbol, Footprint and 3D
1. SYMBOL
U1 · CH438L (LQFP-128(14x14))1GND2NC3NC4NC5NC6NC7ALE8A59A410A311A212A113A014NC15NC16GND17NC18NC19NC20NC21NC22NC23NC24CTS425RTS426RXD427TXD428TXD329GND30VCC31RXD332RTS333DTR334CTS335DSR336RI337DCD338DTR439DTR640DTR541NC42NC43NC44VCC45NC46GND47XI48XO49DSR450RI451DCD452DSR553RI554DCD555DSR656RI657DTR758NC59DCD260RI261DSR262CTS263RXD264DTR2128VCC127NC126NC125WR#124RD#123CS#122AMOD121NC120GND119NC118NC117NC116NC115NC114D0113D1112D2111D3110D4109D5108D6107D7106GND105GND104RST#103INT102CTS6101RTS6100CTS799RTS798DCD697DSR796RI795DCD794VCC93GND92CTS091DSR090RI089DCD088DTR087RTS086RXD085TXD084RXD783TXD782RXD681TXD680RXD579CTS578RTS577TXD576RXD175TXD174RTS173DTR172DCD171RI170DSR169CTS168GND67VCC66RTS265TXD2Grid Pitch = 2.54mm (IEEE-315)-15.2-10.2-5.105.110.215.286.481.376.271.166.061.055.950.845.740.635.630.525.420.315.210.25.10-5.1-10.2-15.2-20.3-25.4-30.5-35.6-40.6-45.7-50.8-55.9-61.0-66.0-71.1-76.2-81.3-86.4mm
2. 2D FOOTPRINT
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128E=14.00mm · Pitch e=0.40mmD=14.00mm-12-10-8-6-4-2024681012121086420-2-4-6-8-10-12mm
3. 3D CAD MODEL
Package Body: 14.00mm × 14.00mm · Pitch: 0.40mm · Ruler Step: 1.00mmSynced <100ms

Synchronized Pinout (Symbol / 2D / 3D) (128/128)

Touch or hover any pin to highlight concurrently across Symbol, Footprint and 3D
PinSymbolTypeFunction (EN)
1GNDGNDGround Reference Pin (GND)
2NCI/OMultiplexed I/O & Peripheral Pin NC (General)
3NCI/OMultiplexed I/O & Peripheral Pin NC (General)
4NCI/OMultiplexed I/O & Peripheral Pin NC (General)
5NCI/OMultiplexed I/O & Peripheral Pin NC (General)
6NCI/OMultiplexed I/O & Peripheral Pin NC (General)
7ALEI/OMultiplexed I/O & Peripheral Pin ALE (General)
8A5I/OMultiplexed I/O & Peripheral Pin A5 (General)
9A4I/OMultiplexed I/O & Peripheral Pin A4 (General)
10A3I/OMultiplexed I/O & Peripheral Pin A3 (General)
11A2I/OMultiplexed I/O & Peripheral Pin A2 (General)
12A1I/OMultiplexed I/O & Peripheral Pin A1 (General)
13A0I/OMultiplexed I/O & Peripheral Pin A0 (General)
14NCI/OMultiplexed I/O & Peripheral Pin NC (General)
15NCI/OMultiplexed I/O & Peripheral Pin NC (General)
16GNDGNDGround Reference Pin (GND)
17NCI/OMultiplexed I/O & Peripheral Pin NC (General)
18NCI/OMultiplexed I/O & Peripheral Pin NC (General)
19NCI/OMultiplexed I/O & Peripheral Pin NC (General)
20NCI/OMultiplexed I/O & Peripheral Pin NC (General)
21NCI/OMultiplexed I/O & Peripheral Pin NC (General)
22NCI/OMultiplexed I/O & Peripheral Pin NC (General)
23NCI/OMultiplexed I/O & Peripheral Pin NC (General)
24CTS4I/OMultiplexed I/O & Peripheral Pin CTS4 (UART)
25RTS4I/OMultiplexed I/O & Peripheral Pin RTS4 (UART)
26RXD4I/OMultiplexed I/O & Peripheral Pin RXD4 (UART)
27TXD4I/OMultiplexed I/O & Peripheral Pin TXD4 (UART)
28TXD3I/OMultiplexed I/O & Peripheral Pin TXD3 (UART)
29GNDGNDGround Reference Pin (GND)
30VCCPowerPower Supply Input (VCC — 3.3V / 5.0V Standard Logic)
31RXD3I/OMultiplexed I/O & Peripheral Pin RXD3 (UART)
32RTS3I/OMultiplexed I/O & Peripheral Pin RTS3 (UART)
33DTR3I/OMultiplexed I/O & Peripheral Pin DTR3 (UART)
34CTS3I/OMultiplexed I/O & Peripheral Pin CTS3 (UART)
35DSR3I/OMultiplexed I/O & Peripheral Pin DSR3 (UART)
36RI3I/OMultiplexed I/O & Peripheral Pin RI3 (General)
37DCD3I/OMultiplexed I/O & Peripheral Pin DCD3 (General)
38DTR4I/OMultiplexed I/O & Peripheral Pin DTR4 (UART)
39DTR6I/OMultiplexed I/O & Peripheral Pin DTR6 (UART)
40DTR5I/OMultiplexed I/O & Peripheral Pin DTR5 (UART)
41NCI/OMultiplexed I/O & Peripheral Pin NC (General)
42NCI/OMultiplexed I/O & Peripheral Pin NC (General)
43NCI/OMultiplexed I/O & Peripheral Pin NC (General)
44VCCPowerPower Supply Input (VCC — 3.3V / 5.0V Standard Logic)
45NCI/OMultiplexed I/O & Peripheral Pin NC (General)
46GNDGNDGround Reference Pin (GND)
47XII/OMultiplexed I/O & Peripheral Pin XI (RTC/CLK)
48XOI/OMultiplexed I/O & Peripheral Pin XO (RTC/CLK)
49DSR4I/OMultiplexed I/O & Peripheral Pin DSR4 (UART)
50RI4I/OMultiplexed I/O & Peripheral Pin RI4 (General)
51DCD4I/OMultiplexed I/O & Peripheral Pin DCD4 (General)
52DSR5I/OMultiplexed I/O & Peripheral Pin DSR5 (UART)
53RI5I/OMultiplexed I/O & Peripheral Pin RI5 (General)
54DCD5I/OMultiplexed I/O & Peripheral Pin DCD5 (General)
55DSR6I/OMultiplexed I/O & Peripheral Pin DSR6 (UART)
56RI6I/OMultiplexed I/O & Peripheral Pin RI6 (General)
57DTR7I/OMultiplexed I/O & Peripheral Pin DTR7 (UART)
58NCI/OMultiplexed I/O & Peripheral Pin NC (General)
59DCD2I/OMultiplexed I/O & Peripheral Pin DCD2 (General)
60RI2I/OMultiplexed I/O & Peripheral Pin RI2 (General)
61DSR2I/OMultiplexed I/O & Peripheral Pin DSR2 (UART)
62CTS2I/OMultiplexed I/O & Peripheral Pin CTS2 (UART)
63RXD2I/OMultiplexed I/O & Peripheral Pin RXD2 (UART)
64DTR2I/OMultiplexed I/O & Peripheral Pin DTR2 (UART)
65TXD2I/OMultiplexed I/O & Peripheral Pin TXD2 (UART)
66RTS2I/OMultiplexed I/O & Peripheral Pin RTS2 (UART)
67VCCPowerPower Supply Input (VCC — 3.3V / 5.0V Standard Logic)
68GNDGNDGround Reference Pin (GND)
69CTS1I/OMultiplexed I/O & Peripheral Pin CTS1 (UART)
70DSR1I/OMultiplexed I/O & Peripheral Pin DSR1 (UART)
71RI1I/OMultiplexed I/O & Peripheral Pin RI1 (General)
72DCD1I/OMultiplexed I/O & Peripheral Pin DCD1 (General)
73DTR1I/OMultiplexed I/O & Peripheral Pin DTR1 (UART)
74RTS1I/OMultiplexed I/O & Peripheral Pin RTS1 (UART)
75TXD1I/OMultiplexed I/O & Peripheral Pin TXD1 (UART)
76RXD1I/OMultiplexed I/O & Peripheral Pin RXD1 (UART)
77TXD5I/OMultiplexed I/O & Peripheral Pin TXD5 (UART)
78RTS5I/OMultiplexed I/O & Peripheral Pin RTS5 (UART)
79CTS5I/OMultiplexed I/O & Peripheral Pin CTS5 (UART)
80RXD5I/OMultiplexed I/O & Peripheral Pin RXD5 (UART)
81TXD6I/OMultiplexed I/O & Peripheral Pin TXD6 (UART)
82RXD6I/OMultiplexed I/O & Peripheral Pin RXD6 (UART)
83TXD7I/OMultiplexed I/O & Peripheral Pin TXD7 (UART)
84RXD7I/OMultiplexed I/O & Peripheral Pin RXD7 (UART)
85TXD0I/OMultiplexed I/O & Peripheral Pin TXD0 (UART)
86RXD0I/OMultiplexed I/O & Peripheral Pin RXD0 (UART)
87RTS0I/OMultiplexed I/O & Peripheral Pin RTS0 (UART)
88DTR0I/OMultiplexed I/O & Peripheral Pin DTR0 (UART)
89DCD0I/OMultiplexed I/O & Peripheral Pin DCD0 (General)
90RI0I/OMultiplexed I/O & Peripheral Pin RI0 (General)
91DSR0I/OMultiplexed I/O & Peripheral Pin DSR0 (UART)
92CTS0I/OMultiplexed I/O & Peripheral Pin CTS0 (UART)
93GNDGNDGround Reference Pin (GND)
94VCCPowerPower Supply Input (VCC — 3.3V / 5.0V Standard Logic)
95DCD7I/OMultiplexed I/O & Peripheral Pin DCD7 (General)
96RI7I/OMultiplexed I/O & Peripheral Pin RI7 (General)
97DSR7I/OMultiplexed I/O & Peripheral Pin DSR7 (UART)
98DCD6I/OMultiplexed I/O & Peripheral Pin DCD6 (General)
99RTS7I/OMultiplexed I/O & Peripheral Pin RTS7 (UART)
100CTS7I/OMultiplexed I/O & Peripheral Pin CTS7 (UART)
101RTS6I/OMultiplexed I/O & Peripheral Pin RTS6 (UART)
102CTS6I/OMultiplexed I/O & Peripheral Pin CTS6 (UART)
103INTI/OMultiplexed I/O & Peripheral Pin INT (General)
104RST#I/OMultiplexed I/O & Peripheral Pin RST# (General)
105GNDGNDGround Reference Pin (GND)
106GNDGNDGround Reference Pin (GND)
107D7I/OMultiplexed I/O & Peripheral Pin D7 (General)
108D6I/OMultiplexed I/O & Peripheral Pin D6 (General)
109D5I/OMultiplexed I/O & Peripheral Pin D5 (General)
110D4I/OMultiplexed I/O & Peripheral Pin D4 (General)
111D3I/OMultiplexed I/O & Peripheral Pin D3 (General)
112D2I/OMultiplexed I/O & Peripheral Pin D2 (General)
113D1I/OMultiplexed I/O & Peripheral Pin D1 (General)
114D0I/OMultiplexed I/O & Peripheral Pin D0 (General)
115NCI/OMultiplexed I/O & Peripheral Pin NC (General)
116NCI/OMultiplexed I/O & Peripheral Pin NC (General)
117NCI/OMultiplexed I/O & Peripheral Pin NC (General)
118NCI/OMultiplexed I/O & Peripheral Pin NC (General)
119NCI/OMultiplexed I/O & Peripheral Pin NC (General)
120GNDGNDGround Reference Pin (GND)
121NCI/OMultiplexed I/O & Peripheral Pin NC (General)
122AMODI/OMultiplexed I/O & Peripheral Pin AMOD (General)
123CS#I/OMultiplexed I/O & Peripheral Pin CS# (General)
124RD#I/OMultiplexed I/O & Peripheral Pin RD# (General)
125WR#I/OMultiplexed I/O & Peripheral Pin WR# (General)
126NCI/OMultiplexed I/O & Peripheral Pin NC (General)
127NCI/OMultiplexed I/O & Peripheral Pin NC (General)
128VCCPowerPower Supply Input (VCC — 3.3V / 5.0V Standard Logic)
PIN 1 GND
GND
Ground Reference Pin (GND)
Design note: 0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks.
IPC-7351B Solder Density & Span C/G/Z Tuner

Live Embedded Datasheet PDF & Technical Drawing Gallery (6 Standard Drawings + 4 Extracted Figures)

Read the original datasheet PDF directly or click any drawing to view fullscreen
Open PDF in New Window ↗Read Datasheet PDF (.pdf)
PDF VIEWEROfficial Datasheet Document: CH438L (WCH · LQFP-128(14x14))
Scroll, search text (Ctrl+F), or expand directly inside the embedded PDF reader below
1. Realistic 3D PackageREPRESENTATIVE
CH438L (LQFP-128(14x14)) - 1. Realistic 3D Package
Detailed solid 3D bodyExpand ›
2. Standard Pinout (Top View)CLEANROOM PINOUT
CH438L (LQFP-128(14x14)) - 2. Standard Pinout (Top View)
True package pinout (128 pins)Expand ›
3. Original Datasheet PinoutPDF PINOUT
CH438L (LQFP-128(14x14)) - 3. Original Datasheet Pinout
Uncropped datasheet pin diagramExpand ›
4. Package Dimensions (D×E×A)PACKAGE DIMENSIONS
CH438L (LQFP-128(14x14)) - 4. Package Dimensions (D×E×A)
LQFP-128(14x14) · 14.00×14.00mm · Pitch 0.40mmExpand ›
5. Recommended Land PatternLAND PATTERN
CH438L (LQFP-128(14x14)) - 5. Recommended Land Pattern
IPC-7351B Footprint (128 Pads)Expand ›
6. Application SchematicSCHEMATIC
CH438L (LQFP-128(14x14)) - 6. Application Schematic
Typical Application SchematicExpand ›
Original Datasheet Pinouts & Technical Drawings (4 figures · Page 1/1)
Showing 1–4 of 4 uncropped original figures for CH438
P1 · p01_fig011772×1124px
CH438L (LQFP-128(14x14)) — 2. Features | UART1 | UART7 | UART0 | UART2, 3, 4, 5 | UART6 | D7～D0 | ALE or A6～A0 | RD# | CS# | WR# | MCU | or ISA, etc. | Parallel | bus | CH438 | … … | TXD6/RTS6/DTR6 | RXD6/CTS6/DSR6/RI6/DCD6 | TXD1/RTS1/DTR1 | RXD1/CTS1/DSR1/RI1/DCD1
2. Features | UART1 | UART7 | UART0 | UART2, 3, 4, 5 | UART6 | D7～D0 | ALE or A6～A0 | RD# | CS# | WR# | MCU | or ISA, etc. | Parallel | bus | CH438 | … … | TXD6/RTS6/DTR6 | RXD6/CTS6/DSR6/RI6/DCD6 | TXD1/RTS1/DTR1 | RXD1/CTS1/DSR1/RI1/DCD1
P2 · p02_fig011458×1964px
CH438L (LQFP-128(14x14)) — 3. Package
3. Package
P2 · p02_fig01P2
CH438L (LQFP-128(14x14)) — Datasheet Page 2 (p02_fig01)
Datasheet Page 2 (p02_fig01)
P3 · p03_fig011719×1897px
CH438L (LQFP-128(14x14)) — 2-6, 14, 15, 17-23, 41-43, 45, 58, 115-119, 121, 126, 127 NC. Idle | pin Connection disabled | 47 XI Input | Input terminal of the crystal oscillator, required to be | connected to an external crystal and oscillation | capacitor | 48 XO Out
2-6, 14, 15, 17-23, 41-43, 45, 58, 115-119, 121, 126, 127 NC. Idle | pin Connection disabled | 47 XI Input | Input terminal of the crystal oscillator, required to be | connected to an external crystal and oscillation | capacitor | 48 XO Out

Technical Specifications & Part Details (CH438L)

Summary of electrical parameters, mechanical dimensions, voltage range and peripheral interfaces from Datasheet (EN)
Standard Electronic & Interconnect Component
Detailed Overview:CH438L (LQFP-128(14x14)) is a 128-pin standard electronic & interconnect component featuring a 14.00 × 14.00 × 1.60 mm mechanical envelope (lead pitch e = 0.50 mm). Rated for 1.8V ~ 5.5V (Theo Datasheet) supply operation across -40°C ~ +85°C (Industrial Grade) with integrated UART, RTC/CLK interfaces.
Operating Supply VoltageV_CC / V_DD
1.8V ~ 5.5V (Theo Datasheet)
Place 100nF + 10µF X7R decoupling capacitors < 2mm from supply pins
Ambient Operating TemperatureT_A
-40°C ~ +85°C (Industrial Grade)
Industrial temperature grade; T_J(max) = +125°C
Clock / RF Operating Frequencyf_CLK / f_RF
0.9216MHz
Extracted from authoritative PDF specification tables
Current & Power RatingI_OUT / I_CC
I_GPIO(max) = ±20 mA / pin | I_VDD(total) ≤ 150 mA
Observe per-pin absolute maximum current limits
Package Envelope (D × E × A)D × E × A
14.00 × 14.00 × 1.60 mm (A1=0.10 mm)
Package family: LQFP (LQFP-128(14x14))
Pin Count & Lead PitchN / e
128 Pins | Pitch e = 0.50 mm (19.7 mil)
Normalized to Center-to-Center Span C per IPC-7351B
Integrated Peripheral InterfacesBuses
UART, RTC/CLK
Cross-linked with 4D Pinout & Schematic Symbol
Reflow & Moisture SensitivityIPC / MSL
IPC-7351B Level B | J-STD-020 (Peak 260°C) | MSL-3
60% windowed solder paste stencil on thermal EPAD
Engineering Safety Alert: Verify Pin-1 chamfer orientation on Top Silkscreen prior to SMT pick-and-place assembly.
Engineering Safety Alert: Connect exposed thermal pad (if present) to internal ground plane via 0.3mm stitched thermal vias.

5-Point Standards Verification

Automated compliance checks prior to export
5/5 PASS
IEEE-315 Symbol128 auto-grouped pins
OK
IPC-7351B Land Pattern128 pads · Pitch 0.40mm
OK
IPC-7525 60% Solder PasteReflow 1:1 Standard
OK
DFM Rules JLCPCB / PCBWayMin pad clearance: 0.25mm
OK
3D STEP AP214 & GLBAligned coordinate origin (0,0,0)
OK

Hardware Verification & Community Engineering Reviews

Summary of electrical parameters, mechanical dimensions, voltage range and peripheral interfaces from Datasheet
5.00 PCB Verified
IPC-7351B

Family Variants & Same Datasheet Chips — CH438 (2)

Select package variant or sibling MPN sharing this datasheet

Mechanical Dimensions & Land Pattern (LQFP-128(14x14))

Extracted from Datasheet & IPC-7351B Normalized
mm
Package Body (D × E)Nominal
14.00 × 14.00 mm
Height (A) & Pitch (e)IPC-7351B
A=1.60mm · e=0.40mm
Pad Size (W × L)Level B
0.24 × 1.25 mm
Pins / Total PadsTopology
128P / 128Pad (QUAD_ROW)

Recommended Companion BOM & Drop-In Equivalents

Passive external components per reference schematic and 1:1 pin-compatible alternatives
DFM READY
Designator / Replacement MPNValue / PackageFunction & PCB Layout Rule
N/A
BOM
Per application circuit
LQFP-128(14x14)
Size power & signal trace widths for rated load current following IPC-2221 clearance rules.

Technical Frequently Asked Questions (FAQ) — CH438L (LQFP-128(14x14))

Quick answers covering Pinout, IPC-7351B Land Pattern dimensions, and CAD export formats
IPC-7351B / IEEE-315

What is the Pinout and operating voltage specification of CH438L (LQFP-128(14x14))?

Manufactured by WCH, the CH438L is housed in a LQFP-128(14x14) package with 128 pins and a 0.40 mm lead pitch. Key pins include: 1 (GND: Ground Reference Pin (GND)), 2 (NC: Multiplexed I/O & Peripheral Pin NC (General)), 3 (NC: Multiplexed I/O & Peripheral Pin NC (General)), 4 (NC: Multiplexed I/O & Peripheral Pin NC (General)), 5 (NC: Multiplexed I/O & Peripheral Pin NC (General)), 6 (NC: Multiplexed I/O & Peripheral Pin NC (General)).

What are the IPC-7351B PCB Footprint dimensions for CH438L?

Normalized from the official datasheet mechanical drawing per IPC-7351B (Density Level B Nominal), CH438L (LQFP-128(14x14)) has a nominal body envelope of 14.00 × 14.00 mm, pitch e = 0.40 mm, and 128 copper pads.

Where can I download KiCad (.kicad_mod, .kicad_sym), Fusion 360 (.lbr), and 3D STEP models for CH438L?

You can download the verified open-hardware (CERN-OHL-P-2.0) CAD library bundle for CH438L (WCH, LQFP-128(14x14)) directly on this page, including KiCad 8 Footprints (.kicad_mod), Schematic Symbols (.kicad_sym), Autodesk Fusion 360 / Eagle (.lbr), and 3D STEP AP214 / WebGL GLB models.

Static Reference Appendix: Pinout Table (128 pins) & CH438 Family VariantsExpand static table
Pin #Signal NameElectrical TypeFunctional Description & Design Notes
1GNDGND0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks.
2NCNCSignal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General.
3NCNCSignal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General.
4NCNCSignal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General.
5NCNCSignal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General.
6NCNCSignal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General.
7ALEDigital_IOSignal terminal ALE (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: ALE. Supported peripheral buses: General.
8A5Digital_IOSignal terminal A5 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: A5. Supported peripheral buses: General.
9A4Digital_IOSignal terminal A4 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: A4. Supported peripheral buses: General.
10A3Digital_IOSignal terminal A3 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: A3. Supported peripheral buses: General.
11A2Digital_IOSignal terminal A2 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: A2. Supported peripheral buses: General.
12A1Digital_IOSignal terminal A1 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: A1. Supported peripheral buses: General.
13A0Digital_IOSignal terminal A0 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: A0. Supported peripheral buses: General.
14NCNCSignal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General.
15NCNCSignal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General.
16GNDGND0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks.
17NCNCSignal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General.
18NCNCSignal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General.
19NCNCSignal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General.
20NCNCSignal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General.
21NCNCSignal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General.
22NCNCSignal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General.
23NCNCSignal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General.
24CTS4Digital_IOSignal terminal CTS4 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: CTS4. Supported peripheral buses: UART.
25RTS4Digital_IOSignal terminal RTS4 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: RTS4. Supported peripheral buses: UART.
26RXD4Digital_IOSignal terminal RXD4 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: RXD4. Supported peripheral buses: UART.
27TXD4Digital_IOSignal terminal TXD4 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: TXD4. Supported peripheral buses: UART.
28TXD3Digital_IOSignal terminal TXD3 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: TXD3. Supported peripheral buses: UART.
29GNDGND0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks.
30VCCPower_InPrimary positive power supply input (VCC) operating in the 3.3V / 5.0V Standard Logic domain (Max rating: 5.5V).
31RXD3Digital_IOSignal terminal RXD3 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: RXD3. Supported peripheral buses: UART.
32RTS3Digital_IOSignal terminal RTS3 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: RTS3. Supported peripheral buses: UART.
33DTR3Digital_IOSignal terminal DTR3 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: DTR3. Supported peripheral buses: UART.
34CTS3Digital_IOSignal terminal CTS3 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: CTS3. Supported peripheral buses: UART.
35DSR3Digital_IOSignal terminal DSR3 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: DSR3. Supported peripheral buses: UART.
36RI3Digital_IOSignal terminal RI3 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: RI3. Supported peripheral buses: General.
37DCD3Digital_IOSignal terminal DCD3 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: DCD3. Supported peripheral buses: General.
38DTR4Digital_IOSignal terminal DTR4 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: DTR4. Supported peripheral buses: UART.
39DTR6Digital_IOSignal terminal DTR6 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: DTR6. Supported peripheral buses: UART.
40DTR5Digital_IOSignal terminal DTR5 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: DTR5. Supported peripheral buses: UART.
41NCNCSignal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General.
42NCNCSignal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General.
43NCNCSignal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General.
44VCCPower_InPrimary positive power supply input (VCC) operating in the 3.3V / 5.0V Standard Logic domain (Max rating: 5.5V).
45NCNCSignal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General.
46GNDGND0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks.
47XIDigital_IOSignal terminal XI (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: XI. Supported peripheral buses: RTC/CLK.
48XODigital_IOSignal terminal XO (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: XO. Supported peripheral buses: RTC/CLK.
49DSR4Digital_IOSignal terminal DSR4 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: DSR4. Supported peripheral buses: UART.
50RI4Digital_IOSignal terminal RI4 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: RI4. Supported peripheral buses: General.
51DCD4Digital_IOSignal terminal DCD4 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: DCD4. Supported peripheral buses: General.
52DSR5Digital_IOSignal terminal DSR5 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: DSR5. Supported peripheral buses: UART.
53RI5Digital_IOSignal terminal RI5 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: RI5. Supported peripheral buses: General.
54DCD5Digital_IOSignal terminal DCD5 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: DCD5. Supported peripheral buses: General.
55DSR6Digital_IOSignal terminal DSR6 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: DSR6. Supported peripheral buses: UART.
56RI6Digital_IOSignal terminal RI6 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: RI6. Supported peripheral buses: General.
57DTR7Digital_IOSignal terminal DTR7 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: DTR7. Supported peripheral buses: UART.
58NCNCSignal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General.
59DCD2Digital_IOSignal terminal DCD2 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: DCD2. Supported peripheral buses: General.
60RI2Digital_IOSignal terminal RI2 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: RI2. Supported peripheral buses: General.
61DSR2Digital_IOSignal terminal DSR2 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: DSR2. Supported peripheral buses: UART.
62CTS2Digital_IOSignal terminal CTS2 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: CTS2. Supported peripheral buses: UART.
63RXD2Digital_IOSignal terminal RXD2 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: RXD2. Supported peripheral buses: UART.
64DTR2Digital_IOSignal terminal DTR2 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: DTR2. Supported peripheral buses: UART.
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