TCA9802DGKR from Texas Instruments, in a VSSOP-8-0.65mm. 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	VCCA	power_in	A-side supply voltage, operating range 0.8 V to 3.6 V.
2	SCLA	bidirectional	A-side serial clock bus, which must be connected to VCCA through a pull-up resistor even if unused.
3	SDAA	bidirectional	A-side serial data bus, which must be connected to VCCA through a pull-up resistor even if unused.
4	GND	power_in	Ground reference for the device.
5	EN	input	Active-high repeater enable input, referenced to VCCA.
6	SDAB	bidirectional	B-side serial data bus, which must not be connected to VCCB through a pull-up resistor for proper operation and should be left floating if unused.
7	SCLB	bidirectional	B-side serial clock bus, which must not be connected to VCCB through a pull-up resistor for proper operation and should be left floating if unused.
8	VCCB	power_in	B-side and device supply voltage, operating range 1.65 V to 3.6 V.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	VSSOP-8-0.65mm
Category	Logic
Pins	8

Electrical characteristics

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

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Supply voltage on A-side	VCCA	-0.5		4	V		4
Supply voltage on B-side	VCCB	-0.5		4	V		4
Enable input voltage	VEN	-0.5		4	V		4
I2C bus voltage	VI/O	-0.5		4	V		4
Maximum SDAA, SCLA IOL current	IOL			20	mA		4
Input clamp current (SDAB/SCLB)	IIK	-20			mA		4
Input clamp current (EN, VCCA, VCCB, SDAA, SCLA)	IIK	-20			mA		4
Output clamp current (SDAB/SCLB)	IOK	-20			mA		4
Output clamp current (EN, VCCA, VCCB, SDAA, SCLA)	IOK	-20			mA		4
Operating junction temperature	TJ			130	°C		4
Storage temperature	Tstg	-60		150	°C		4
Operating free-air temperature	TA	-40		125	°C		4
Supply voltage	VCCA	0.8		3.6	V		4
Supply voltage	VCCB	1.65		3.6	V		4
Input-output voltage	VI/O	0		3.6	V	SDAA, SCLA	4
Junction-to-ambient thermal resistance	RθJA		174.1		°C/W		4
Current source tolerance		-25		25	%		5
Low-level output voltage	VOL		0.04	0.13	V	SDAA, SCLA IOL = 6 mA, VILB = 0 V	5
Low-level output voltage	VOL		0.22	0.26	V	SDAB, SCLB VIA = 0 V	5
Allowed input leakage current of ICS	IEXT-I		0	200	µA	SDAB, SCLB	5
Allowed output leakage current of ICS	IEXT-O		0	200	µA	SDAB, SCLB	5
Current source value	ICS		2.2		mA		5
Enable pin pull-up	REN	150	250	450	kΩ		5
Low-level input current contention	IILC	800			µA	SDAB, SCLB	5
Low-level allowed pull-down resistance	RILC			150	Ω	SDAB, SCLB	5
Bus capacitance limit	CBUS		0	400	pF	SDAB, SCLB	5
Under-voltage lockout VCCA	UVLO	0.3	0.55	0.8	V	VCCA rising and falling; VCCB = 1.65 or 3.6 V	5
Under-voltage lockout VCCB rising	UVLO	1.3	1.51	1.6	V	VCCB rising; VCCA = 0.8 or 3.6 V	5
Under-voltage lockout VCCB falling	UVLO	1.2	1.4	1.6	V	VCCB falling; VCCA = 0.8 or 3.6 V	5
Quiescent supply current for VCCA	ICCA		0.1	7	µA	SDAA = SCLA = VCCA or GND, SDAB = SCLB = open, EN = VCCA; VCCA = 0.8 V	5
Quiescent supply current for VCCA	ICCA		0.1	8	µA	SDAA = SCLA = VCCA or GND, SDAB = SCLB = open, EN = VCCA; VCCA = 1.8 V	5
Quiescent supply current for VCCA	ICCA		0.2	9	µA	SDAA = SCLA = VCCA or GND, SDAB = SCLB = open, EN = VCCA; VCCA = 2.5 V	5
Quiescent supply current for VCCA	ICCA		0.2	12	µA	SDAA = SCLA = VCCA or GND, SDAB = SCLB = open, EN = VCCA; VCCA = 3.6 V	5
Quiescent supply current for VCCB, both channels high	ICCB		33	60	µA	Both channels high, SDAA = SCLA pulled up to VCCA, SDAB = SCLB = open, EN = VCCA; VCCB = 1.8 V	5
Quiescent supply current for VCCB, both channels high	ICCB		36	65	µA	Both channels high, SDAA = SCLA pulled up to VCCA, SDAB = SCLB = open, EN = VCCA; VCCB = 2.5 V	5
Quiescent supply current for VCCB, both channels high	ICCB		41	75	µA	Both channels high, SDAA = SCLA pulled up to VCCA, SDAB = SCLB = open, EN = VCCA; VCCB = 3.6 V	5
Quiescent supply current for VCCB, both channels low	ICCB		4.3	5.2	mA	Both channels low, SDAA = SCLA = GND, SDAB = SCLB = open, EN = VCCA; VCCB = 1.8 V	5
Quiescent supply current for VCCB, both channels low	ICCB		4.4	5.2	mA	Both channels low, SDAA = SCLA = GND, SDAB = SCLB = open, EN = VCCA; VCCB = 2.5 V	5
Quiescent supply current for VCCB, both channels low	ICCB		4.5	5.3	mA	Both channels low, SDAA = SCLA = GND, SDAB = SCLB = open, EN = VCCA; VCCB = 3.6 V	5
Total quiescent supply current	ICCA + ICCB		34		µA	VCCA = VCCB = 1.8 V, SDAA/SCLA = VCCA, SDAB/SCLB = VCCB	6
Input leakage current	II	-10		10	µA	SDAA, SCLA; VI = VCCA, EN = GND	6
I/O capacitance	CIO		2	10	pF	SDAA, SCLA; VI = 0 V or 3.3 V, f = 1 MHz	6
I/O capacitance	CIO		8		pF	SDAB, SCLB; VCCB = GND, VI = 0 V, f = 1 MHz	6
Max SCL clock frequency	fSCL(MAX)			400	kHz		6
Rise time Port A	tr		57	70	ns		6
Rise time Port B	tr		16	35	ns	VCCB = 1.65 V	6
Rise time Port B	tr		36	75	ns	VCCB = 3.6 V	6
Fall time Port A	tf		9	30	ns		6
Fall time Port B	tf		35	70	ns		6
Propagation delay high-to-low Port A to Port B	tPHL		75	200	ns		6
Propagation delay high-to-low Port B to Port A	tPHL		85	250	ns		6
Propagation delay low-to-high Port A to Port B	tPLH		20	90	ns		6
Propagation delay low-to-high Port B to Port A	tPLH		110	260	ns		6
Startup time	tstartup		65	350	µs		6
Enable time	ten		280	1000	ns		6
Disable time	tdis		700	1800	ns		6

CAD (KiCad official)

Symbol: TCA9802DGKR
Footprint: Package_SO:VSSOP-8_2.3x2mm_P0.5mm
3D model: VSSOP-8-0.65mm (KiCad packages3D, STEP)
3D model files: tca9802dgkr-etched.step / tca9802dgkr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tca9802dgkr.step / tca9802dgkr.glb are the bare package body.

Provenance

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

Datasheet: Texas Instruments datasheet (38 pp, sha256 c31cb4a7b0a39d20, retrieved 2026-11-06, 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

TCA9802DGKR

Verified TCA9802DGKR

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3D Model

Symbol & Footprint

Schematic Symbol

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Datasheet

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