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SN75176ADE4 Equivalent & Substitute Parts
Part Overview
The SN75176ADE4 is a half-duplex RS422/RS485 transceiver IC manufactured by Texas Instruments in 8-SOIC surface mount packaging. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design support and procurement continuity. The part operates within a 4.75V to 5.25V supply voltage range and supports half-duplex communication protocols with a 50 mV receiver hysteresis specification. Locating compatible alternatives ensures design flexibility and supply chain resilience for applications requiring RS422/RS485 interface functionality.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | SN75176ADE4 |
| Manufacturer | Texas Instruments |
| Category | Interface |
| Type | Transceiver |
| Protocol | RS422, RS485 |
| Duplex Configuration | Half |
| Number of Drivers/Receivers | 1/1 |
| Receiver Hysteresis | 50 mV |
| Voltage Supply Range | 4.75V ~ 5.25V |
| Operating Temperature Range | 0°C ~ 70°C |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| Product Status | Obsolete |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the SN75176ADE4 is determined by strict alignment of electrical and mechanical parameters. The primary substitution criteria are:
Critical Parameters for Direct Substitution:
- Protocol support (RS422/RS485)
- Duplex configuration (Half-duplex)
- Driver/Receiver count (1/1)
- Package type (8-SOIC)
- Receiver hysteresis (50 mV)
- Voltage supply range compatibility (4.75V ~ 5.25V)
- Operating temperature range (minimum 0°C ~ 70°C)
Substitution Categories:
Category 1: Manufacturer Recommended Equivalents (Texas Instruments) Parts SN75176AD, SN75176ADR, and SN75176ADG4 are direct Texas Instruments equivalents sharing identical electrical specifications and 8-SOIC packaging. These parts maintain the same base product number (75176) and differ only in packaging format (Tube, Cut Tape, or Digi-Reel) and product status.
Category 2: Parametric Equivalents (Texas Instruments) Part SN75176BD represents a parametric equivalent with identical core specifications but different product status classification.
Category 3: Cross-Manufacturer Alternatives (Renesas Electronics) Parts ISL3179EIBZ, ISL3179EIBZ-T, ISL43485IBZ, ISL43485IBZ-T, and ISL4485EIBZ are Renesas alternatives that maintain RS422/RS485 half-duplex 1/1 transceiver functionality in 8-SOIC packaging. These parts exhibit variations in receiver hysteresis, data rate, voltage supply range, and operating temperature specifications.
Category 4: Full-Duplex Alternative Part ISL3180EIBZ is a full-duplex transceiver in 14-SOIC packaging. This part is suitable only for applications where full-duplex operation is acceptable and PCB layout can accommodate the larger package footprint.
Parameter Comparison
| Part Number | Manufacturer | Type | Duplex | Drivers/Receivers | Package | Receiver Hysteresis | Voltage Supply | Operating Temp | Data Rate | Product Status |
|---|---|---|---|---|---|---|---|---|---|---|
| SN75176ADE4 | Texas Instruments | Transceiver | Half | 1/1 | 8-SOIC | 50 mV | 4.75V ~ 5.25V | 0°C ~ 70°C | — | Obsolete |
| SN75176AD | Texas Instruments | Transceiver | Half | 1/1 | 8-SOIC | 50 mV | 4.75V ~ 5.25V | 0°C ~ 70°C | — | Obsolete |
| SN75176ADR | Texas Instruments | Transceiver | Half | 1/1 | 8-SOIC | 50 mV | 4.75V ~ 5.25V | 0°C ~ 70°C | — | Active |
| SN75176ADG4 | Texas Instruments | Transceiver | Half | 1/1 | 8-SOIC | 50 mV | 4.75V ~ 5.25V | 0°C ~ 70°C | — | Obsolete |
| SN75176BD | Texas Instruments | Transceiver | Half | 1/1 | 8-SOIC | 50 mV | 4.75V ~ 5.25V | 0°C ~ 70°C | — | Obsolete |
| ISL3179EIBZ | Renesas Electronics | Transceiver | Half | 1/1 | 8-SOIC | 28 mV | 3V ~ 3.6V | -40°C ~ 125°C | 40 Mbps | Active |
| ISL3179EIBZ-T | Renesas Electronics | Transceiver | Half | 1/1 | 8-SOIC | 28 mV | 3V ~ 3.6V | -40°C ~ 85°C | 40 Mbps | Active |
| ISL3180EIBZ | Renesas Electronics | Transceiver | Full | 1/1 | 14-SOIC | 28 mV | 3V ~ 3.6V | -40°C ~ 85°C | 40 Mbps | Active |
| ISL43485IBZ | Renesas Electronics | Transceiver | Half | 1/1 | 8-SOIC | 50 mV | 3V ~ 3.6V | -40°C ~ 85°C | 50 Mbps | Active |
| ISL43485IBZ-T | Renesas Electronics | Transceiver | Half | 1/1 | 8-SOIC | 50 mV | 3V ~ 3.6V | -40°C ~ 85°C | 50 Mbps | Active |
| ISL4485EIBZ | Renesas Electronics | Transceiver | Half | 1/1 | 8-SOIC | 70 mV | 4.5V ~ 5.5V | -40°C ~ 85°C | 20 Mbps | Obsolete |
Engineering Selection Recommendations
For Direct Replacement (Identical Specifications): SN75176ADR is the preferred choice among Texas Instruments equivalents. This part maintains all electrical and mechanical specifications of the SN75176ADE4 while carrying Active product status, ensuring long-term availability and manufacturing support. The ADR variant is supplied in Cut Tape and Digi-Reel packaging with 35,100 units in stock, providing supply chain stability.
For Active Product Status with Enhanced Performance: ISL43485IBZ and ISL43485IBZ-T (Renesas Electronics) are active alternatives that preserve the critical 50 mV receiver hysteresis specification and half-duplex 1/1 configuration in 8-SOIC packaging. These parts operate at 3V to 3.6V supply voltage and support 50 Mbps data rates, offering improved performance characteristics. Both variants are ROHS3 compliant and carry Active product status with substantial inventory availability (7,746 and 17,700 units respectively).
For Extended Temperature Range Applications: ISL3179EIBZ and ISL3179EIBZ-T provide operating temperature ranges extending to -40°C and 125°C/-85°C respectively, compared to the original 0°C to 70°C specification. These parts maintain RS422/RS485 half-duplex 1/1 transceiver functionality in 8-SOIC packaging with 40 Mbps data rate capability. The reduced receiver hysteresis (28 mV) and lower supply voltage range (3V to 3.6V) require circuit validation for compatibility.
For Full-Duplex Applications: ISL3180EIBZ accommodates applications requiring full-duplex operation. This part transitions to 14-SOIC packaging and maintains Renesas Active product status with 15,700 units in stock. PCB layout modifications are necessary to accommodate the larger package footprint.
Compliance Considerations: All recommended alternatives maintain ROHS3 compliance and REACH Unaffected status, consistent with the original SN75176ADE4 specifications.
Frequently Asked Questions (FAQ)
Q: Can SN75176ADR directly replace SN75176ADE4 in existing designs? A: Yes. SN75176ADR is electrically and mechanically identical to SN75176ADE4, differing only in packaging format (Cut Tape/Digi-Reel versus the original format) and product status (Active versus Obsolete). No circuit modifications are required. Pin configuration, electrical specifications, and package dimensions are identical.
Q: What are the key differences between Texas Instruments and Renesas alternatives? A: Texas Instruments SN75176 series parts maintain the original 4.75V to 5.25V supply voltage and 0°C to 70°C operating temperature specifications. Renesas ISL3179 and ISL43485 series parts operate at lower supply voltages (3V to 3.6V) and extended temperature ranges (-40°C to 85°C or 125°C), with enhanced data rate capabilities (40 to 50 Mbps). Circuit validation is required when transitioning between manufacturers due to voltage and temperature specification differences.
Q: Is ISL3180EIBZ suitable as a substitute for SN75176ADE4? A: ISL3180EIBZ is functionally compatible for RS422/RS485 communication but operates in full-duplex mode rather than half-duplex. The package transitions from 8-SOIC to 14-SOIC, requiring PCB layout modifications. Use this part only when full-duplex operation is acceptable and PCB space permits the larger package.
Q: What is the significance of receiver hysteresis in transceiver selection? A: Receiver hysteresis determines the voltage differential required to switch receiver output states, affecting noise immunity and signal integrity. The original SN75176ADE4 specifies 50 mV hysteresis. ISL3179 series parts provide 28 mV hysteresis (increased sensitivity), while ISL4485EIBZ provides 70 mV (reduced sensitivity). Selection depends on application noise environment and signal characteristics.
Q: Are all substitute parts ROHS3 compliant? A: Yes. All recommended substitute parts listed maintain ROHS3 compliance and REACH Unaffected status, consistent with the original SN75176ADE4 specifications.
Q: What packaging options are available for the SN75176 series? A: Texas Instruments offers SN75176 series parts in three packaging formats: Tube (SN75176AD, SN75176ADG4), Cut Tape with Digi-Reel (SN75176ADR), and the original format (SN75176ADE4). All maintain identical 8-SOIC package dimensions and electrical specifications. Selection depends on procurement and assembly requirements.
Q: Can ISL43485IBZ operate at the original 4.75V to 5.25V supply voltage? A: No. ISL43485IBZ operates within a 3V to 3.6V supply voltage range, which does not overlap with the original 4.75V to 5.25V specification. Circuit redesign is required to accommodate the lower supply voltage if this part is selected. Verify power supply compatibility before implementation.
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