PCA9534APW Equivalent & Substitute Parts

Part Overview

The PCA9534APW is an 8-bit I/O expander with I2C and SMBus interface operating at 400 kHz, manufactured by Texas Instruments in a 16-TSSOP package. This device is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The PCA9534APW provides push-pull output configuration with 10mA/25mA source/sink current capability and operates across a 2.3V to 5.5V supply range with -40°C to 85°C temperature range.

Key Parameters

Parameter	Value
Manufacturer Part Number	PCA9534APW
Manufacturer	Texas Instruments
Number of I/O	8
Interface	I2C, SMBus
Clock Frequency	400 kHz
Voltage Supply Range	2.3V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Output Type	Push-Pull
Current Output Source/Sink	10mA, 25mA
Package / Case	16-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the PCA9534APW is determined by the following critical parameters: 8 I/O count, I2C/SMBus interface support, 400 kHz clock frequency, 16-TSSOP package compatibility, push-pull output configuration, and voltage supply range of 2.3V to 5.5V. Substitute parts are grouped into two categories:

Category 1: Direct Package and Interface Match (16-TSSOP, Push-Pull Output) Parts maintaining identical package form factor, push-pull output type, and compatible voltage supply range: PCA9534PW,118 and PCA9674APW,118 / PCA9674PW,118 / PCA9674PW/S911,118.

Category 2: Alternative Package with Functional Equivalence (16-QSOP, Open Drain Output) Parts providing 8 I/O expansion with I2C/SMBus interface in alternative package form: MAX7315AEE+, MAX7315AEE+T, and MAX7315AUE+ / MAX7315AUE+T.

Category 3: Extended Frequency with Package Match (16-TSSOP, Push-Pull Output) Parts offering higher clock frequency (1 MHz) in matching 16-TSSOP package: PCA9674 series variants.

Category 4: Alternative Manufacturer with Functional Equivalence (16-TSSOP, Open Drain Output) Parts from alternative manufacturers providing I2C/SMBus interface in matching package: XRA1200IG16TR-F and XRA1200PIG16TR-F.

Parameter Comparison

Parameter	PCA9534APW	MAX7315AUE+	MAX7315AEE+	PCA9534PW,118	PCA9674APW,118	XRA1200IG16TR-F
Number of I/O	8	8	8	8	8	8
Interface	I2C, SMBus	I2C, SMBus	I2C, SMBus	I2C, SMBus	I2C	I2C, SMBus
Clock Frequency	400 kHz	400 kHz	400 kHz	400 kHz	1 MHz	400 kHz
Voltage Supply Range	2.3V ~ 5.5V	2V ~ 3.6V	2V ~ 3.6V	2.3V ~ 5.5V	2.3V ~ 5.5V	1.65V ~ 3.6V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Output Type	Push-Pull	Open Drain	Open Drain	Push-Pull	Push-Pull	Open Drain
Current Output Source/Sink	10mA, 25mA	50mA	50mA	10mA, 25mA	100µA, 25mA	Not Specified
Package / Case	16-TSSOP	16-TSSOP	16-SSOP	16-TSSOP	16-TSSOP	16-TSSOP
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical and Mechanical Characteristics): PCA9534PW,118 is the primary substitute, offering identical push-pull output configuration, voltage supply range (2.3V ~ 5.5V), clock frequency (400 kHz), and 16-TSSOP package. This part maintains active product status with ROHS3 compliance and 8038 units in stock.

For Higher Clock Frequency Applications: PCA9674APW,118, PCA9674PW,118, and PCA9674PW/S911,118 provide 1 MHz clock frequency operation while maintaining push-pull output, identical voltage supply range, and 16-TSSOP package. These variants are suitable when faster I2C communication is required. All maintain active status and ROHS3 compliance.

For Alternative Voltage Supply Requirements (Lower Range): MAX7315AUE+ and MAX7315AUE+T operate at 2V ~ 3.6V supply range with extended operating temperature to 125°C. These parts feature open-drain output and 50mA source/sink capability in 16-TSSOP package. Selection requires circuit redesign to accommodate open-drain topology and reduced voltage range.

For Alternative Package Form Factor: MAX7315AEE+ and MAX7315AEE+T provide equivalent functionality in 16-QSOP package (0.154", 3.90mm Width) with open-drain output and 2V ~ 3.6V supply range. These are suitable when PCB layout constraints permit package substitution.

For Extended Voltage Range (Lower Minimum): XRA1200IG16TR-F and XRA1200PIG16TR-F operate at 1.65V ~ 3.6V supply range with open-drain output in 16-TSSOP package. These parts support I2C/SMBus at 400 kHz and are suitable for low-voltage applications. RoHS compliance is confirmed.

All substitute parts maintain ROHS3 or RoHS compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can MAX7315AUE+ directly replace PCA9534APW without circuit modification? A: No. While both provide 8 I/O expansion with I2C/SMBus interface at 400 kHz in 16-TSSOP package, the MAX7315AUE+ features open-drain output versus push-pull output on the PCA9534APW. Open-drain output requires external pull-up resistors and cannot source current. Additionally, the MAX7315AUE+ operates at 2V ~ 3.6V supply range versus 2.3V ~ 5.5V for the PCA9534APW. Circuit redesign is necessary.

Q: What is the difference between PCA9534PW,118 and PCA9674APW,118? A: Both are NXP I/O expanders in 16-TSSOP package with push-pull output and 2.3V ~ 5.5V supply range. The primary difference is clock frequency: PCA9534PW,118 operates at 400 kHz while PCA9674APW,118 operates at 1 MHz. The PCA9674 series also features lower source current (100µA) but maintains 25mA sink current. Select PCA9674 when higher I2C communication speed is required.

Q: Are MAX7315AEE+ and MAX7315AUE+ interchangeable? A: Both are Analog Devices MAX7315 variants with identical electrical specifications (8 I/O, I2C/SMBus 400 kHz, 2V ~ 3.6V supply, open-drain output, 50mA source/sink). The difference is package form: MAX7315AEE+ uses 16-QSOP (0.154", 3.90mm) while MAX7315AUE+ uses 16-TSSOP (0.173", 4.40mm). Selection depends on PCB layout requirements and available footprint space.

Q: Can XRA1200IG16TR-F operate at 5.5V supply voltage? A: No. The XRA1200IG16TR-F maximum supply voltage is 3.6V. The PCA9534APW operates up to 5.5V. If your application requires 5V operation, XRA1200 series is not suitable. Use PCA9534PW,118 or PCA9674 series variants instead.

Q: What is the significance of the ",118" suffix in part numbers like PCA9534PW,118? A: The ",118" suffix indicates the supplier device package designation and is part of the complete manufacturer part number. It does not affect electrical or mechanical specifications. Parts with and without this suffix from the same manufacturer are equivalent.

Q: Do all substitute parts maintain RoHS compliance? A: Yes. All listed substitute parts are either ROHS3 Compliant or RoHS Compliant. The PCA9534APW is ROHS3 Compliant, and all active substitute parts maintain equivalent or higher RoHS compliance status.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) packaging? A: Tape & Reel packaging is supplied on continuous tape wound on reels for automated assembly equipment. Cut Tape & Digi-Reel packaging is supplied in tape segments cut to specific lengths. Both contain identical components; packaging selection depends on production volume and assembly equipment compatibility.

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