PCA9534D,512 Equivalent & Substitute Parts

Part Overview

The PCA9534D,512 is an 8-bit I/O expander interface circuit manufactured by NXP USA Inc., designed for I2C and SMBus communication at 400 kHz. This component features open-drain output configuration with Power-On Reset (POR) functionality, operating across a supply voltage range of 2.3V to 5.5V and temperature range of -40°C to 85°C in a 16-SOIC surface-mount package.

The PCA9534D,512 is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and system upgrades.

Substiute Parts

PCA9534D,512

NXP USA Inc.In Stock: 1086PCA9534D,512 Datasheet

Current PartRFQ

MAX7329AWE+

Analog Devices Inc./Maxim IntegratedIn Stock: 1206MAX7329AWE+ Datasheet

MFR RecommendedRFQ

PCA9534ADW

Texas InstrumentsIn Stock: 877PCA9534ADW Datasheet

MFR RecommendedRFQ

PCA9534ADWR

Texas InstrumentsIn Stock: 3323PCA9534ADWR Datasheet

MFR RecommendedRFQ

PCA9534DW

Texas InstrumentsIn Stock: 782PCA9534DW Datasheet

MFR RecommendedRFQ

PCA9534DWR

Texas InstrumentsIn Stock: 2205PCA9534DWR Datasheet

MFR RecommendedRFQ

TCA9534ADWR

Texas InstrumentsIn Stock: 3016TCA9534ADWR Datasheet

MFR RecommendedRFQ

TCA9534ADWT

Texas InstrumentsIn Stock: 1679TCA9534ADWT Datasheet

MFR RecommendedRFQ

TCA9534DWR

Texas InstrumentsIn Stock: 65813TCA9534DWR Datasheet

MFR RecommendedRFQ

TCA9534DWT

Texas InstrumentsIn Stock: 45334TCA9534DWT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PCA9534D,512 are grouped based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

• Number of I/O: 8 (fixed requirement)
• Interface Protocol: I2C or I2C/SMBus support
• Clock Frequency: 400 kHz operation
• Package Type: 16-SOIC form factor
• Mounting: Surface Mount
• Operating Temperature Range: -40°C minimum to 85°C minimum
• Supply Voltage Compatibility: Overlap with 2.3V ~ 5.5V range
• Interrupt Output: Yes
• RoHS3 Compliance: Required

Substitution Groups:

Group 1 - Direct Functional Equivalents (PCA9534 Series from Texas Instruments) Parts maintaining identical I2C/SMBus 400 kHz operation with push-pull output configuration: PCA9534ADW, PCA9534ADWR, PCA9534DW, PCA9534DWR, TCA9534ADWR, TCA9534ADWT, TCA9534DWR, TCA9534DWT

Group 2 - Alternative I/O Expander (Analog Devices/Maxim) Part with reduced clock frequency but compatible I2C interface and electrical characteristics: MAX7329AWE+

Parameter Comparison

Engineering Selection Recommendations

Recommended Primary Substitutes (Active Product Status):

PCA9534DWR, TCA9534ADWR, TCA9534ADWT, TCA9534DWR, and TCA9534DWT are the preferred substitutes, all carrying Active product status with unlimited moisture sensitivity level (MSL 1). These parts maintain full compatibility with the original PCA9534D,512 specification across all critical electrical and mechanical parameters.

Secondary Substitutes (Last Time Buy Status):

PCA9534ADW, PCA9534ADWR, and PCA9534DW are available as Last Time Buy alternatives. These parts provide identical functional performance but with limited future availability.

Alternative Substitute (Active Status, Reduced Clock Frequency):

MAX7329AWE+ from Analog Devices Inc./Maxim Integrated operates at 100 kHz clock frequency instead of 400 kHz. This part is suitable only for applications where reduced I2C bus speed is acceptable. It features open-drain output matching the original part and extended operating temperature range to 125°C. Current output capability is specified at 25mA.

All substitute parts maintain ROHS3 compliance and REACH unaffected status, meeting regulatory requirements equivalent to the original component.

Frequently Asked Questions (FAQ)

Q: Can I use TCA9534 series parts as direct replacements for PCA9534D,512?

A: Yes. TCA9534ADWR, TCA9534ADWT, TCA9534DWR, and TCA9534DWT are direct functional equivalents. All maintain 8 I/O, 400 kHz I2C operation, 16-SOIC packaging, and -40°C to 85°C temperature range. The primary difference is extended supply voltage range (1.65V minimum vs. 2.3V minimum), which provides additional design flexibility.

Q: What is the key difference between PCA9534 and TCA9534 series?

A: Both series provide identical I2C/SMBus 400 kHz I/O expander functionality in 16-SOIC packages. TCA9534 variants support lower minimum supply voltage (1.65V) and are currently in Active production status, while PCA9534 variants from Texas Instruments are in Last Time Buy status.

Q: Why is MAX7329AWE+ listed as a substitute if it operates at 100 kHz instead of 400 kHz?

A: MAX7329AWE+ is included as an alternative for applications where I2C bus speed reduction is acceptable. It provides 8 I/O expansion with open-drain output and interrupt capability in the same 16-SOIC package. Use this part only when system timing requirements permit 100 kHz operation.

Q: Are there output type differences I should consider?

A: Yes. The original PCA9534D,512 features open-drain output. Most Texas Instruments substitutes (PCA9534 and TCA9534 series) use push-pull output. MAX7329AWE+ maintains open-drain output. Verify your application's pull-up resistor configuration and load requirements before selecting a push-pull alternative.

Q: What packaging options are available for these substitutes?

A: Substitutes are available in Tube, Tape & Reel (TR), and Cut Tape (CT) & Digi-Reel® packaging. Select based on your procurement and assembly requirements. All maintain identical electrical and mechanical specifications regardless of packaging format.

Q: Which substitute has the best long-term availability?

A: TCA9534DWR and TCA9534DWT carry Active product status with the highest inventory levels (65,780 and 45,300 units respectively), ensuring sustained availability for future production requirements.