PCA9534DGVR Equivalent & Substitute Parts

Part Overview

The PCA9534DGVR is an 8-bit I/O expander designed for I2C and SMBus communication at 400 kHz, manufactured by Texas Instruments. This device is classified as Last Time Buy, indicating discontinued production with limited inventory availability. The PCA9534DGVR operates across a supply voltage range of 2.3V to 5.5V and supports push-pull output configuration with source/sink current capability of 10mA and 25mA respectively. Finding equivalent substitute parts is necessary due to the Last Time Buy status and limited stock of 1280 pieces.

Substiute Parts

PCA9534DGVR

Texas InstrumentsIn Stock: 1357PCA9534DGVR Datasheet

Current PartRFQ

TCA9534PWR

Texas InstrumentsIn Stock: 165243TCA9534PWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PCA9534DGVR is determined by the following critical parameters:

• Number of I/O: 8 channels
• Interface Protocol: I2C or SMBus compatibility
• Clock Frequency: 400 kHz operation
• Output Configuration: Push-Pull topology
• Current Capability: 10mA and 25mA source/sink
• Operating Temperature Range: -40°C to 85°C
• Supply Voltage Compatibility: Overlapping voltage ranges
• Package Footprint: 16-pin TFSOP or equivalent surface-mount package
• Compliance: ROHS3 and REACH requirements

The TCA9534PWR qualifies as a direct substitute based on matching all critical functional parameters and compliance certifications, with the exception of supply voltage range expansion and package variant.

Parameter Comparison

Engineering Selection Recommendations

The TCA9534PWR is designated as the manufacturer-recommended substitute for the PCA9534DGVR. Selection of this substitute is supported by the following factors:

• Both devices are manufactured by Texas Instruments and share identical base product architecture (TCA9534 family)
• Functional equivalence is confirmed across all critical I/O expansion parameters: 8-bit configuration, 400 kHz I2C operation, push-pull output, and identical current specifications
• The TCA9534PWR maintains full compliance with ROHS3 and REACH requirements
• Active product status of the TCA9534PWR ensures long-term availability and supply chain continuity
• Supply voltage range of the TCA9534PWR (1.65V ~ 5.5V) encompasses the PCA9534DGVR range (2.3V ~ 5.5V), providing expanded operational flexibility
• Package compatibility is maintained through equivalent 16-pin surface-mount configurations (TFSOP vs. TSSOP), both with 4.40mm width specification
• Inventory availability of 165200 pieces for TCA9534PWR provides substantial supply security compared to the limited 1280-piece inventory of the Last Time Buy PCA9534DGVR

Frequently Asked Questions (FAQ)

Q: Can the TCA9534PWR directly replace the PCA9534DGVR in existing designs?

A: Yes. Both devices share identical I/O expansion functionality, interface protocol, clock frequency, output configuration, and current specifications. The 16-pin surface-mount packages are mechanically and electrically compatible for PCB integration.

Q: What is the difference between the 16-TFSOP and 16-TSSOP packages?

A: Both packages are 16-pin surface-mount configurations with 4.40mm width. TFSOP (Thin Fine Small Outline Package) and TSSOP (Thin Shrink Small Outline Package) are equivalent footprints suitable for the same PCB layout. Pin pitch and spacing are identical.

Q: Does the expanded supply voltage range of the TCA9534PWR (1.65V ~ 5.5V) affect compatibility?

A: No. The expanded lower voltage limit of the TCA9534PWR does not affect designs operating within the original PCA9534DGVR range of 2.3V ~ 5.5V. The substitute maintains full compatibility across this voltage window.

Q: Are there any interface differences between I2C and SMBus support?

A: The PCA9534DGVR explicitly supports both I2C and SMBus protocols at 400 kHz. The TCA9534PWR supports I2C at 400 kHz. I2C is the core protocol; SMBus is a superset specification. Designs using I2C communication will experience no functional difference with the TCA9534PWR.

Q: What is the significance of the Last Time Buy status for the PCA9534DGVR?

A: Last Time Buy indicates that Texas Instruments has discontinued production of the PCA9534DGVR. The current inventory of 1280 pieces represents the final available stock. Once depleted, this part number will no longer be available. Migration to the active TCA9534PWR is recommended for long-term design sustainability.

Q: Are both parts RoHS3 and REACH compliant?

A: Yes. Both the PCA9534DGVR and TCA9534PWR are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.