GD75232PW Equivalent & Substitute Parts

Part Overview

The GD75232PW is a full-duplex RS232 transceiver IC with 3 drivers and 5 receivers, housed in a 20-TSSOP surface mount package. Manufactured by Texas Instruments, this component is classified as obsolete, which necessitates identification of active equivalent parts for ongoing design support and procurement continuity. The part operates across a wide supply voltage range of 5V and ±7.5V to ±15V, with a maximum data rate of 120 Kbps and receiver hysteresis of 500 mV.

Substiute Parts

GD75232PW

Texas InstrumentsIn Stock: 1405GD75232PW Datasheet

Current PartRFQ

GD75232PWR

Texas InstrumentsIn Stock: 74283GD75232PWR Datasheet

MFR RecommendedRFQ

ST75185CTR

STMicroelectronicsIn Stock: 19823ST75185CTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the GD75232PW is determined by strict equivalence across the following parameters:

• Protocol: RS232
• Transceiver configuration: 3 drivers / 5 receivers
• Duplex mode: Full
• Data rate capability: 120 Kbps minimum
• Receiver hysteresis: 500 mV
• Package: 20-TSSOP surface mount
• Operating temperature range: 0°C ~ 70°C minimum
• RoHS3 compliance

Both identified substitute parts meet these criteria and are classified as active products, providing direct functional replacement capability.

Parameter Comparison

Engineering Selection Recommendations

GD75232PWR is the primary recommended substitute. As an active product from the same manufacturer (Texas Instruments) with identical electrical specifications and packaging, it provides direct functional replacement with no design modifications required. The part maintains the same supply voltage range, data rate, and thermal operating window as the obsolete GD75232PW.

ST75185CTR is a secondary substitute option. While functionally equivalent in protocol, driver/receiver configuration, and package format, it operates within a narrower supply voltage range (4.5V ~ 5.5V) compared to the GD75232PW (5V, ±7.5V ~ 15V). This voltage specification difference requires verification against the target application's power supply architecture. The ST75185CTR also carries a higher moisture sensitivity level (MSL 3 vs. MSL 1), which may impact storage and handling requirements in high-humidity environments.

Both substitutes are ROHS3 compliant and suitable for applications requiring RS232 full-duplex transceiver functionality at 120 Kbps data rates.

Frequently Asked Questions (FAQ)

Q: Can GD75232PWR be used as a direct replacement for GD75232PW without PCB modifications?

A: Yes. GD75232PWR is pin-compatible and electrically equivalent. Both parts use the 20-TSSOP package with identical pinout and electrical characteristics. No PCB layout changes are required.

Q: What is the key difference between GD75232PWR and ST75185CTR?

A: The primary difference is supply voltage range. GD75232PWR accepts 5V and ±7.5V to ±15V, while ST75185CTR operates only within 4.5V to 5.5V. Applications using dual-rail power supplies (±15V or ±12V) must use GD75232PWR. Additionally, ST75185CTR has MSL 3 rating versus MSL 1 for GD75232PWR, affecting moisture-sensitive storage requirements.

Q: Are all three parts ROHS3 compliant?

A: Yes. GD75232PW, GD75232PWR, and ST75185CTR are all ROHS3 compliant and REACH unaffected.

Q: What packaging formats are available for the substitute parts?

A: GD75232PWR is supplied in Cut Tape (CT) and Digi-Reel format. ST75185CTR is also available in Cut Tape (CT) and Digi-Reel format. The original GD75232PW was supplied in Tube packaging.

Q: Can ST75185CTR be used in applications requiring ±15V supply voltage?

A: No. ST75185CTR is rated for 4.5V to 5.5V supply voltage only. It cannot operate with ±15V or ±12V dual-rail supplies. GD75232PWR must be used for such applications.

Q: What is the significance of the 500 mV receiver hysteresis specification?

A: Receiver hysteresis of 500 mV defines the voltage differential between the rising and falling threshold levels of the RS232 input comparators. This specification is identical across all three parts and ensures consistent noise immunity and signal integrity in RS232 communication links.