Specification	PCA9555DWR

Clock Frequency	400 kHz
Current - Output Source/Sink [custom]	10 mA
Current - Output Source/Sink [custom]	25 mA
Features	POR
Interface	I2C, SMBus
Interrupt Output	True
Mounting Type	Surface Mount
Number of I/O	16
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Output Type	Push-Pull
Package / Case	24-SOIC
Package / Case [custom]	7.5 mm
Package / Case [custom]	0.295 in
Supplier Device Package	24-SOIC
Voltage - Supply [Max]	5.5 V
Voltage - Supply [Min]	2.3 V

PCA9555 Series

Part	Output Type	Number of I/O	Voltage - Supply [Min]	Voltage - Supply [Max]	Features	Package / Case [custom]	Package / Case	Package / Case [custom]	Supplier Device Package	Operating Temperature [Max]	Operating Temperature [Min]	Interface	Mounting Type	Clock Frequency	Current - Output Source/Sink [custom]	Current - Output Source/Sink [custom]	Package / Case [y]	Package / Case [y]	Package / Case
Texas Instruments PCA9555DWR	Push-Pull	16	2.3 V	5.5 V	POR	7.5 mm	24-SOIC	0.295 in	24-SOIC	85 °C	-40 °C	I2C SMBus	Surface Mount	400 kHz	10 mA	25 mA
Texas Instruments PCA9555DGVR	Push-Pull	16	2.3 V	5.5 V	POR		24-TFSOP		24-TVSOP	85 °C	-40 °C	I2C SMBus	Surface Mount	400 kHz	10 mA	25 mA	4.4 mm	0.173 in
Texas Instruments PCA9555RGER	Push-Pull	16	2.3 V	5.5 V	POR		24-VFQFN Exposed Pad		24-VQFN (4x4)	85 °C	-40 °C	I2C SMBus	Surface Mount	400 kHz	10 mA	25 mA
Texas Instruments PCA9555DWRG4	Push-Pull	16	2.3 V	5.5 V	POR	7.5 mm	24-SOIC	0.295 in	24-SOIC	85 °C	-40 °C	I2C SMBus	Surface Mount	400 kHz	10 mA	25 mA
Texas Instruments PCA9555PW	Push-Pull	16	2.3 V	5.5 V	POR		24-TSSOP		24-TSSOP	85 °C	-40 °C	I2C SMBus	Surface Mount	400 kHz	10 mA	25 mA			0.173 in 4.4 mm
Texas Instruments PCA9555RGERG4	Push-Pull	16	2.3 V	5.5 V	POR		24-VFQFN Exposed Pad		24-VQFN (4x4)	85 °C	-40 °C	I2C SMBus	Surface Mount	400 kHz	10 mA	25 mA
Texas Instruments PCA9555PWRG4	Push-Pull	16	2.3 V	5.5 V	POR		24-TSSOP		24-TSSOP	85 °C	-40 °C	I2C SMBus	Surface Mount	400 kHz	10 mA	25 mA			0.173 in 4.4 mm
Texas Instruments PCA9555DBQR	Push-Pull	16	2.3 V	5.5 V	POR	0.154 " 3.9 mm	24-SSOP		24-SSOP	85 °C	-40 °C	I2C SMBus	Surface Mount	400 kHz	10 mA	25 mA
Texas Instruments PCA9555PWRE4	Push-Pull	16	2.3 V	5.5 V	POR		24-TSSOP		24-TSSOP	85 °C	-40 °C	I2C SMBus	Surface Mount	400 kHz	10 mA	25 mA			0.173 in 4.4 mm
Texas Instruments PCA9555PWR	Push-Pull	16	2.3 V	5.5 V	POR		24-TSSOP		24-TSSOP	85 °C	-40 °C	I2C SMBus	Surface Mount	400 kHz	10 mA	25 mA			0.173 in 4.4 mm

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	$ 2.92
		10	$ 1.90
		25	$ 1.63
		100	$ 1.32
		250	$ 1.18
		500	$ 1.09
		1000	$ 1.01
	Digi-Reel®	1	$ 2.92
		10	$ 1.90
		25	$ 1.63
		100	$ 1.32
		250	$ 1.18
		500	$ 1.09
		1000	$ 1.01
	Tape & Reel (TR)	2000	$ 0.86
		4000	$ 0.82
		6000	$ 0.79
		10000	$ 0.77
Texas Instruments	LARGE T&R	1	$ 1.50
		100	$ 1.24
		250	$ 0.89
		1000	$ 0.67

Description

General part information

PCA9555 Series

This 16-bit I/O expander for the two-line bidirectional bus (I2C) is designed for 2.3-V to 5.5-V VCCoperation. It provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface [serial clock (SCL), serial data (SDA)].

The PCA9555 consists of two 8-bit Configuration (input or output selection), Input Port, Output Port, and Polarity Inversion (active high or active low operation) registers. At power on, the I/Os are configured as inputs. The system master can enable the I/Os as either inputs or outputs by writing to the I/O configuration bits. The data for each input or output is kept in the corresponding Input or Output register. The polarity of the Input Port register can be inverted with the Polarity Inversion register. All registers can be read by the system master.