Specification	TCA9554ADBQR

Clock Frequency	400 kHz
Features	POR
Interface	I2C, SMBus
Interrupt Output	True
Mounting Type	Surface Mount
Number of I/O	8
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Output Type	Push-Pull
Package / Case	0.154 in
Package / Case	16-SSOP
Package / Case	3.9 mm
Supplier Device Package	16-SSOP
Voltage - Supply [Max]	5.5 V
Voltage - Supply [Min]	1.65 V

TCA9554A Series

8-bit 1.65- to 5.5-V I2C/SMBus I/O expander with interrupt, weak pull-up & config registers

Part	Mounting Type	Features	Output Type	Interface	Number of I/O	Operating Temperature [Max]	Operating Temperature [Min]	Clock Frequency	Package / Case	Package / Case [custom]	Package / Case [custom]	Voltage - Supply [Max]	Voltage - Supply [Min]	Supplier Device Package	Package / Case [x]	Package / Case [y]	Package / Case	Package / Case	Current - Output Source/Sink [custom]	Current - Output Source/Sink [custom]
Texas Instruments TCA9554ADBR	Surface Mount	POR	Push-Pull	I2C SMBus	8	85 °C	-40 °C	400 kHz	16-SSOP	0.209 in	5.3 mm	5.5 V	1.65 V	16-SSOP
Texas Instruments TCA9554DBR	Surface Mount	POR	Push-Pull	I2C	8	85 °C	-40 °C	400 kHz	16-SSOP	0.209 in	5.3 mm	5.5 V	1.65 V	16-SSOP
Texas Instruments TCA9554DWT	Surface Mount	POR	Push-Pull	I2C	8	85 °C	-40 °C	400 kHz	16-SOIC			5.5 V	1.65 V	16-SOIC	0.295 in	7.5 mm
Texas Instruments TCA9554ADBQR	Surface Mount	POR	Push-Pull	I2C SMBus	8	85 °C	-40 °C	400 kHz	16-SSOP			5.5 V	1.65 V	16-SSOP			0.154 in	3.9 mm
Texas Instruments TCA9554PWR	Surface Mount	POR	Push-Pull	I2C SMBus	8	85 °C	-40 °C	400 kHz	16-TSSOP			5.5 V	1.65 V	16-TSSOP	0.173 in	4.4 mm			10 mA	25 mA
Texas Instruments TCA9554DWR	Surface Mount	POR	Push-Pull	I2C	8	85 °C	-40 °C	400 kHz	16-SOIC			5.5 V	1.65 V	16-SOIC	0.295 in	7.5 mm
Texas Instruments TCA9554APWR	Surface Mount	POR	Push-Pull	I2C SMBus	8	85 °C	-40 °C	400 kHz	16-TSSOP			5.5 V	1.65 V	16-TSSOP	0.173 in	4.4 mm			10 mA	25 mA

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Cut Tape (CT)	1	$ 1.50
		10	$ 1.34
		25	$ 1.27
		100	$ 1.05
		250	$ 0.98
		500	$ 0.86
		1000	$ 0.68
	Digi-Reel®	1	$ 1.50
		10	$ 1.34
		25	$ 1.27
		100	$ 1.05
		250	$ 0.98
		500	$ 0.86
		1000	$ 0.68
	Tape & Reel (TR)	2500	$ 0.64
		5000	$ 0.61
		12500	$ 0.58
Texas Instruments	LARGE T&R	1	$ 1.03
		100	$ 0.79
		250	$ 0.58
		1000	$ 0.42

Description

General part information

TCA9554A Series

The TCA9554A is a 16-pin device that provides 8 bits of general purpose parallel input-output (I/O) expansion for the two-line bidirectional I2C bus (or SMBus) protocol. The device can operate with a power supply voltage ranging from 1.65 V to 5.5 V. The device supports both 100-kHz (Standard-mode) and 400-kHz (Fast-mode) clock frequencies. I/O expanders such as the TCA9554A provide a simple solution when additional I/Os are needed for switches, sensors, push-buttons, LEDs, fans, and other similar devices.

The features of the TCA9554A include an interrupt that is generated on theINTpin whenever an input port changes state. The A0, A1, and A2 hardware selectable address pins allow up to eight TCA9554A devices on the same I2C bus. The device can also be reset to its default sate by cycling the power supply and causing a power-on reset.