PCA9654EDTR2G from onsemi, in a TSSOP-16. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	AD0	input	Address input 0 selects one of 64 slave addresses together with AD1 and AD2; no internal pull-up resistor is incorporated on AD0.
2	AD1	input	Address input 1 selects one of 64 slave addresses together with AD0 and AD2; no internal pull-up resistor is incorporated on AD1.
3	AD2	input	Address input 2 selects one of 64 slave addresses together with AD0 and AD1; no internal pull-up resistor is incorporated on AD2.
4	IO0	bidirectional	General-purpose I/O 0, configurable as input (high-impedance with weak 100 kΩ pull-up to VDD) or output; may be raised to a maximum of 5.5 V when configured as input, and each bit is limited to 25 mA sink.
5	IO1	bidirectional	General-purpose I/O 1, configurable as input (high-impedance with weak 100 kΩ pull-up to VDD) or output; may be raised to a maximum of 5.5 V when configured as input, and each bit is limited to 25 mA sink.
6	IO2	bidirectional	General-purpose I/O 2, configurable as input (high-impedance with weak 100 kΩ pull-up to VDD) or output; may be raised to a maximum of 5.5 V when configured as input, and each bit is limited to 25 mA sink.
7	IO3	bidirectional	General-purpose I/O 3, configurable as input (high-impedance with weak 100 kΩ pull-up to VDD) or output; may be raised to a maximum of 5.5 V when configured as input, and each bit is limited to 25 mA sink.
8	VSS	power_in	Supply ground.
9	IO4	bidirectional	General-purpose I/O 4, configurable as input (high-impedance with weak 100 kΩ pull-up to VDD) or output; may be raised to a maximum of 5.5 V when configured as input, and each bit is limited to 25 mA sink.
10	IO5	bidirectional	General-purpose I/O 5, configurable as input (high-impedance with weak 100 kΩ pull-up to VDD) or output; may be raised to a maximum of 5.5 V when configured as input, and each bit is limited to 25 mA sink.
11	IO6	bidirectional	General-purpose I/O 6, configurable as input (high-impedance with weak 100 kΩ pull-up to VDD) or output; may be raised to a maximum of 5.5 V when configured as input, and each bit is limited to 25 mA sink.
12	IO7	bidirectional	General-purpose I/O 7, configurable as input (high-impedance with weak 100 kΩ pull-up to VDD) or output; may be raised to a maximum of 5.5 V when configured as input, and each bit is limited to 25 mA sink.
13	INT	output	Active-LOW open-drain interrupt output, activated when any input state differs from its corresponding input port register state; sinks 6 mA at VOL = 0.4 V.
14	SCL	input	I2C-bus serial clock line, supporting Standard Mode (100 kHz), Fast Mode (400 kHz) and Fast Mode+ (1 MHz) and requiring an external pull-up to a positive supply.
15	SDA	bidirectional	I2C-bus serial data line, open-drain with 30 mA SDA sink capability, requiring an external pull-up to a positive supply.
16	VDD	power_in	Supply voltage, operating range 1.65 V to 5.5 V.

Key specifications

Parameter	Value
Manufacturer	onsemi
Package	TSSOP-16
Category	Interface ICs
Pins	16

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
DC Supply Voltage (recommended)	VDD	1.65		5.5	V		4
Switch Input / Output Voltage	VI/O	0		5.5	V		4
Operating Free-Air Temperature	TA	-55		125	°C		4
DC Supply Voltage (absolute max)	VDD	-0.5		7	V		4
Input / Output Pin Voltage	VI/O	-0.5		7	V		4
Input Current	II			20	mA		4
Output Current	IO			50	mA		4
DC Supply Current	IDD			100	mA		4
DC Ground Current	IGND			200	mA		4
Total Power Dissipation	PTOT			400	mW		4
Power Dissipation per Output	POUT			100	mW		4
Storage Temperature Range	TSTG	-65		150	°C		4
Lead Temperature	TL			260	°C	1 mm from case for 10 seconds	4
Junction Temperature Under Bias	TJ			150	°C	Under bias	4
Power Dissipation in Still Air	PD			190	mW	Still air at 85°C	4
ESD Human Body Model	VESD	4000			V	Human Body Model; printed > 4000 V	4
ESD Machine Model	VESD	400			V	Machine Model; printed > 400 V	4
Supply Current, operating	IDD		250	500	µA	Operating mode; no load; VI = VDD or 0 V; fSCL = 1 MHz	5
Supply Current, operating	IDD		104	175	µA	VI = VDD or 0 V; fSCL = 100 kHz	5
Standby Current	ISTB		550	700	µA	Standby mode; no load; VI = 0 V; fSCL = 0 Hz; I/O = inputs	5
Standby Current	ISTB		0.25	1	µA	VI = VDD; fSCL = 0 Hz; I/O = inputs	5
Low-Level Output Current (SCL, SDA)	IOL	10			mA	VOL = 0.4 V; VDD < 2.3 V	5
Low-Level Output Current (SCL, SDA)	IOL	20			mA	VOL = 0.4 V; VDD ≥ 2.3 V	5
Leakage Current (SCL, SDA)	IL			1	µA	VI = VDD or GND	5
High-Level Input Voltage (I/O)	VIH	2			V	2.3 V ≤ VCC ≤ 5.5 V	5
Low-Level Input Voltage (I/O)	VIL			0.8	V	2.3 V ≤ VCC ≤ 5.5 V	5
Low-Level Output Current (I/O)	IOL	8		13	mA	VOL = 0.5 V; VDD = 1.65 V	5
Low-Level Output Current (I/O)	IOL	12		22	mA	VOL = 0.5 V; VDD = 2.3 V	5
Low-Level Output Current (I/O)	IOL	17		28	mA	VOL = 0.5 V; VDD = 3.0 V	5
Low-Level Output Current (I/O)	IOL	25		37	mA	VOL = 0.5 V; VDD = 4.5 V	5
Total Low-Level Output Current	IOL(tot)			200	mA	VOL = 0.5 V; VDD = 4.5 V	5
High-Level Output Voltage	VOH	1.2			V	IOH = −3 mA; VDD = 1.65 V	5
High-Level Output Voltage	VOH	1.1			V	IOH = −4 mA; VDD = 1.65 V	5
High-Level Output Voltage	VOH	1.8			V	IOH = −8 mA; VDD = 2.3 V	5
High-Level Output Voltage	VOH	1.7			V	IOH = −10 mA; VDD = 2.3 V	5
High-Level Output Voltage	VOH	2.6			V	IOH = −8 mA; VDD = 3.0 V	5
High-Level Output Voltage	VOH	2.5			V	IOH = −10 mA; VDD = 3.0 V	5
High-Level Output Voltage	VOH	4.1			V	IOH = −8 mA; VDD = 4.5 V	5
High-Level Output Voltage	VOH	4			V	IOH = −10 mA; VDD = 4.5 V	5
Input Leakage Current (high)	ILH			1	µA	VDD = 5.5 V; VI = VDD	5
Input Leakage Current (low)	ILL	-100			µA	VDD = 5.5 V; VI = GND	5
Low-Level Output Current (INT)	IOL	6			mA	VOL = 0.4 V	5
High-Level Input Voltage (AD0-AD2)	VIH	2			V	2.3 V ≤ VCC ≤ 5.5 V	5
Low-Level Input Voltage (AD0-AD2)	VIL			0.8	V	2.3 V ≤ VCC ≤ 5.5 V	5
Leakage Current (AD0-AD2)	IL			1	µA	VI = VDD or GND	5
SCL Clock Frequency (Standard Mode)	fSCL	0		0.1	MHz	Standard Mode	6
SCL Clock Frequency (Fast Mode)	fSCL	0		0.4	MHz	Fast Mode	6
SCL Clock Frequency (Fast Mode +)	fSCL	0		1	MHz	Fast Mode +	6
Bus-Free Time between STOP and START	tBUF	4.7			µs	Standard Mode	6
Bus-Free Time between STOP and START	tBUF	1.3			µs	Fast Mode	6
Bus-Free Time between STOP and START	tBUF	0.5			µs	Fast Mode +	6
Data Setup Time	tSU:DAT	250			ns	Standard Mode	6
Data Setup Time	tSU:DAT	100			ns	Fast Mode	6
Data Setup Time	tSU:DAT	50			ns	Fast Mode +	6
Data Input Setup Time	tSU(D)	100			ns	CL ≤ 100 pF	6
Data Output Valid Time	tV(Q)			350	ns	CL ≤ 100 pF	6
Data Input Hold Time	tH(D)	1			µs	CL ≤ 100 pF	6
Data Valid Time (interrupt)	tV(INT_N)			4	µs	CL ≤ 100 pF	6
Power-On Reset Voltage	VPOR		1.5		V		5
Thermal Resistance, junction to ambient (TSSOP-16)	θJA		124		°C/W	Minimum pad spacing on FR4; 10 mm x 1 inch 2 oz copper trace; no air flow (Note 1)	4

CAD (KiCad official)

Symbol: PCA9654EDTR2G
Footprint: Package_SO:TSSOP-16_4.4x5mm_P0.65mm
3D model: TSSOP-16 (KiCad packages3D, STEP)
3D model files: pca9654edtr2g-etched.step / pca9654edtr2g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); pca9654edtr2g.step / pca9654edtr2g.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: onsemi datasheet (22 pp, sha256 87e488f9fe8a48bf, retrieved 2026-11-05, tier: manufacturer)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF

PCA9654EDTR2G

Verified PCA9654EDTR2G

Verification log 1 record

3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

README