PCA9554APWRG4 Equivalent & Substitute Parts

Part Overview

The PCA9554APWRG4 is an 8-bit I/O expander with I2C and SMBus interface operating at 400 kHz, manufactured by Texas Instruments in a 16-TSSOP surface mount package. This part is discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications. The device provides push-pull output capability with 10mA/25mA source/sink current, interrupt output with power-on reset (POR), and operates across a 2.3V to 5.5V supply voltage range at temperatures from -40°C to 85°C.

Key Parameters

Parameter	Value
Number of I/O	8
Interface	I2C, SMBus
Clock Frequency	400 kHz
Output Type	Push-Pull
Current - Output Source/Sink	10mA, 25mA
Interrupt Output	Yes
Features	POR
Voltage - Supply	2.3V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package / Case	16-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the PCA9554APWRG4 is determined by strict equivalence across the following critical parameters:

8-bit I/O configuration
I2C and SMBus protocol support at 400 kHz
Push-pull output topology with 10mA/25mA drive capability
Interrupt output with power-on reset functionality
16-TSSOP package footprint compatibility
Surface mount mounting type
ROHS3 compliance and MSL Level 1 rating

Substitute parts must maintain identical electrical performance within the specified operating ranges. Supply voltage tolerance variations (2.3V–5.5V versus 1.65V–5.5V) do not preclude substitution when the application operates within the overlapping range. All listed substitutes meet these criteria and are available in active production status or through authorized distribution channels.

Parameter Comparison

Part Number	Manufacturer	I/O Count	Interface	Clock Frequency	Output Type	Current Source/Sink	Supply Voltage	Operating Temperature	Package	Product Status
PCA9554APWRG4	Texas Instruments	8	I2C, SMBus	400 kHz	Push-Pull	10mA, 25mA	2.3V ~ 5.5V	-40°C ~ 85°C	16-TSSOP	Discontinued
TCA9554APWR	Texas Instruments	8	I2C, SMBus	400 kHz	Push-Pull	10mA, 25mA	1.65V ~ 5.5V	-40°C ~ 85°C	16-TSSOP	Active
PCA9554APW,118	NXP Semiconductors	8	I2C, SMBus	400 kHz	Push-Pull	10mA, 25mA	2.3V ~ 5.5V	-40°C ~ 85°C	16-TSSOP	Active
PCA9554PW,112	NXP USA Inc.	8	I2C, SMBus	400 kHz	Push-Pull	10mA, 25mA	2.3V ~ 5.5V	-40°C ~ 85°C	16-TSSOP	Active
PCA9554PW,118	NXP USA Inc.	8	I2C, SMBus	400 kHz	Push-Pull	10mA, 25mA	2.3V ~ 5.5V	-40°C ~ 85°C	16-TSSOP	Active
PCA9554BPWJ	NXP USA Inc.	8	I2C, SMBus	400 kHz	Push-Pull	10mA, 25mA	1.65V ~ 5.5V	-40°C ~ 85°C	16-TSSOP	Active
PCA9554CPWJ	NXP USA Inc.	8	I2C, SMBus	400 kHz	Push-Pull	10mA, 25mA	1.65V ~ 5.5V	-40°C ~ 85°C	16-TSSOP	Active

Engineering Selection Recommendations

All listed substitute parts maintain full electrical and functional equivalence to the PCA9554APWRG4 within the specified operating parameters. Selection among active alternatives should prioritize availability and packaging format requirements:

TCA9554APWR and PCA9554BPWJ offer extended lower supply voltage tolerance (1.65V minimum) compared to the original part (2.3V minimum), providing additional design margin in low-voltage applications. Both are manufactured by established semiconductor suppliers and maintain ROHS3 compliance with MSL Level 1 rating.

PCA9554APW,118, PCA9554PW,112, and PCA9554PW,118 maintain identical supply voltage specifications (2.3V–5.5V) to the original part and are available in multiple packaging formats (Cut Tape/Digi-Reel and Tube). These options provide direct parameter matching with active production status.

PCA9554CPWJ is available in Tape & Reel packaging format with extended voltage tolerance, suitable for high-volume manufacturing environments requiring automated component handling.

Frequently Asked Questions (FAQ)

Q: Can TCA9554APWR replace PCA9554APWRG4 in all applications?

A: Yes. TCA9554APWR is electrically equivalent with identical I/O count, interface protocol, clock frequency, output drive capability, and package footprint. The extended supply voltage range (1.65V–5.5V versus 2.3V–5.5V) provides additional compatibility margin. Both devices are ROHS3 compliant with MSL Level 1 rating.

Q: What is the difference between PCA9554PW,112 and PCA9554PW,118?

A: Both parts are electrically identical. The suffix designates packaging format: PW,112 is supplied in Tube packaging, while PW,118 is supplied in Cut Tape with Digi-Reel format. Selection depends on assembly process requirements and component handling equipment.

Q: Are NXP and Texas Instruments versions interchangeable?

A: Yes. All listed parts meet identical electrical specifications for I/O configuration, interface protocol, clock frequency, output characteristics, and operating temperature range. Manufacturer differences do not affect functional compatibility when parameters are equivalent.

Q: Does supply voltage range affect substitution compatibility?

A: Supply voltage range differences do not preclude substitution when the application operates within the overlapping voltage window. Parts with 1.65V–5.5V range (TCA9554APWR, PCA9554BPWJ, PCA9554CPWJ) are compatible with applications designed for 2.3V–5.5V operation. Extended lower voltage tolerance provides additional design flexibility without compromising higher-voltage applications.

Q: What packaging considerations apply to substitute selection?

A: All substitutes use identical 16-TSSOP surface mount package with 0.173" width and 4.40mm body dimension. Packaging format (Tube, Cut Tape/Digi-Reel, Tape & Reel) affects component handling and assembly process compatibility but does not impact electrical performance or PCB footprint.

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