PCA9539DGVR Equivalent & Substitute Parts

Part Overview

The PCA9539DGVR is a 16-bit I/O expander designed for I2C and SMBus communication at 400 kHz, manufactured by Texas Instruments in a 24-TVSOP surface mount package. This device provides push-pull output capability with configurable source/sink current and includes power-on reset (POR) functionality. The part is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent substitute parts is necessary to ensure design continuity and maintain supply chain reliability for new production runs or long-term inventory planning.

Substiute Parts

PCA9539DGVR

Texas InstrumentsIn Stock: 2315PCA9539DGVR Datasheet

Current PartRFQ

TCA9539PWR

Texas InstrumentsIn Stock: 61089TCA9539PWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PCA9539DGVR is determined by the following critical parameters:

• I/O Count: Must be 16 bits to maintain functional equivalence
• Interface Protocol: Must support I2C and SMBus at 400 kHz operation
• Output Configuration: Must provide push-pull output with matching current specifications (10mA, 25mA source/sink)
• Interrupt Capability: Must include interrupt output functionality
• Power-On Reset: Must include POR feature
• Operating Temperature Range: Must cover -40°C ~ 85°C minimum
• Package Compatibility: Physical package dimensions must be compatible with 24-pin TVSOP or equivalent footprint
• Supply Voltage: Must operate within overlapping voltage range with the original part

The TCA9539PWR meets all substitution criteria as an active production alternative from the same manufacturer with identical functional specifications and enhanced supply voltage flexibility.

Parameter Comparison

Engineering Selection Recommendations

The TCA9539PWR is the primary substitute for the PCA9539DGVR based on the following engineering criteria:

Product Status Alignment: The TCA9539PWR maintains Active production status, ensuring long-term component availability and supply chain stability compared to the Last Time Buy status of the PCA9539DGVR.

Functional Equivalence: Both devices share identical I/O architecture (16-bit), communication protocols (I2C/SMBus 400 kHz), output characteristics (push-pull, 10mA/25mA), and feature sets (POR, interrupt output).

Compliance Certification: Both parts maintain ROHS3 compliance, REACH unaffected status, and identical moisture sensitivity levels, ensuring regulatory and environmental compatibility.

Package Compatibility: The 24-TSSOP package of the TCA9539PWR maintains identical footprint dimensions (0.173", 4.40mm width) to the 24-TVSOP package, enabling direct PCB layout compatibility without redesign.

Supply Voltage Enhancement: The TCA9539PWR extends the lower supply voltage limit to 1.65V, providing additional operational flexibility while maintaining full compatibility with the 2.3V ~ 5.5V range of the original part.

Frequently Asked Questions (FAQ)

Q: Can the TCA9539PWR be used as a direct replacement for the PCA9539DGVR without PCB modifications?

A: Yes. Both devices use 24-pin packages with identical footprint dimensions (0.173", 4.40mm width). The pin configuration, electrical characteristics, and functional specifications are equivalent, enabling direct substitution without PCB layout changes.

Q: What is the difference between the 24-TVSOP and 24-TSSOP packages?

A: Both packages maintain identical external dimensions and footprint compatibility. TVSOP (Thin Very Small Outline Package) and TSSOP (Thin Shrink Small Outline Package) are functionally equivalent for PCB mounting purposes. The physical compatibility ensures seamless substitution.

Q: Does the TCA9539PWR support the same I2C and SMBus protocols as the PCA9539DGVR?

A: Yes. Both devices support I2C and SMBus communication at 400 kHz clock frequency with identical interface specifications, ensuring protocol compatibility and software compatibility without firmware modifications.

Q: Are there any voltage supply considerations when switching from PCA9539DGVR to TCA9539PWR?

A: The TCA9539PWR extends the lower supply voltage range to 1.65V compared to the PCA9539DGVR minimum of 2.3V. Both devices support the full 5.5V upper limit. Designs operating within the 2.3V ~ 5.5V range remain fully compatible with both parts.

Q: What is the inventory status difference between these two parts?

A: The PCA9539DGVR has 2219 pieces in stock with Last Time Buy status, indicating limited future availability. The TCA9539PWR has 60988 pieces in stock with Active production status, providing superior long-term supply chain reliability.

Q: Do both parts require the same PCB layout considerations for I2C termination and decoupling?

A: Yes. Both devices share identical electrical specifications for supply voltage, operating temperature, and I/O characteristics, requiring equivalent PCB design practices for power supply decoupling, I2C pull-up resistor sizing, and signal integrity.