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DS3696AMX Equivalent & Substitute Parts
Part Overview
The DS3696AMX is a half-duplex RS422/RS485 transceiver IC manufactured by Texas Instruments in an 8-SOIC surface mount package. This part is discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications. The DS3696AMX operates within a 4.75V to 5.25V supply voltage range and supports half-duplex communication protocols typical of industrial control and data acquisition systems.
Substiute Parts
Key Parameters
| Parameter | DS3696AMX |
|---|---|
| Manufacturer | Texas Instruments |
| Type | Transceiver |
| Protocol | RS422, RS485 |
| Duplex Mode | Half |
| Number of Drivers/Receivers | 1/1 |
| Receiver Hysteresis | 70 mV |
| Voltage Supply | 4.75V ~ 5.25V |
| Operating Temperature | 0°C ~ 70°C |
| Package | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Product Status | Discontinued at DiGi Electronics |
Substitute Part Grouping Explanation
Substitution for the DS3696AMX is determined by the following critical parameters:
- Package Compatibility: 8-SOIC form factor (0.154", 3.90mm Width) for direct PCB replacement
- Protocol Support: RS422/RS485 half-duplex transceiver functionality
- Driver/Receiver Configuration: 1/1 topology
- Supply Voltage Range: Compatibility with 4.75V ~ 5.25V systems
- Receiver Hysteresis: 70 mV specification for signal integrity
- Duplex Mode: Half-duplex operation
Substitute parts are grouped into two categories based on voltage supply compatibility:
Category 1: 4.75V ~ 5.25V Supply (Direct Voltage Match)
- ADM485EARZ
- ADM485EARZ-REEL7
Category 2: 3V ~ 3.6V Supply (Requires Voltage Regulation)
- ADM3483EARZ-REEL7
- ADM3485ARZ
- ADM3485ARZ-REEL7
- ISL3179EFBZ
- ISL3179EIBZ-T
- ISL43485IBZ
- ISL43485IBZ-T
Note: ISL3180EIBZ is excluded due to full-duplex operation and 14-SOIC package incompatibility with the half-duplex 8-SOIC DS3696AMX.
Parameter Comparison
| Part Number | Manufacturer | Protocol | Duplex | Drivers/Receivers | Hysteresis | Supply Voltage | Operating Temp | Package | Product Status |
|---|---|---|---|---|---|---|---|---|---|
| DS3696AMX | Texas Instruments | RS422, RS485 | Half | 1/1 | 70 mV | 4.75V ~ 5.25V | 0°C ~ 70°C | 8-SOIC | Discontinued |
| ADM485EARZ | Analog Devices Inc. | RS422, RS485 | Half | 1/1 | 70 mV | 4.75V ~ 5.25V | -40°C ~ 85°C | 8-SOIC | Active |
| ADM485EARZ-REEL7 | Analog Devices Inc. | RS422, RS485 | Half | 1/1 | 70 mV | 4.75V ~ 5.25V | -40°C ~ 85°C | 8-SOIC | Active |
| ADM3483EARZ-REEL7 | Analog Devices Inc. | RS422, RS485 | Half | 1/1 | 50 mV | 3V ~ 3.6V | -40°C ~ 85°C | 8-SOIC | Active |
| ADM3485ARZ | Analog Devices Inc. | RS422, RS485 | Half | 1/1 | 50 mV | 3V ~ 3.6V | -40°C ~ 85°C | 8-SOIC | Active |
| ADM3485ARZ-REEL7 | Analog Devices Inc. | RS422, RS485 | Half | 1/1 | 50 mV | 3V ~ 3.6V | -40°C ~ 85°C | 8-SOIC | Active |
| ISL3179EFBZ | Renesas Electronics Corporation | RS422, RS485 | Half | 1/1 | 28 mV | 3V ~ 3.6V | -40°C ~ 125°C | 8-SOIC | Active |
| ISL3179EIBZ-T | Renesas Electronics Corporation | RS422, RS485 | Half | 1/1 | 28 mV | 3V ~ 3.6V | -40°C ~ 85°C | 8-SOIC | Active |
| ISL43485IBZ | Renesas Electronics Corporation | RS422, RS485 | Half | 1/1 | 50 mV | 3V ~ 3.6V | -40°C ~ 85°C | 8-SOIC | Active |
| ISL43485IBZ-T | Renesas Electronics Corporation | RS422, RS485 | Half | 1/1 | 50 mV | 3V ~ 3.6V | -40°C ~ 85°C | 8-SOIC | Active |
Engineering Selection Recommendations
Primary Substitutes (Voltage-Compatible)
For applications operating at 4.75V ~ 5.25V supply voltage, ADM485EARZ and ADM485EARZ-REEL7 are direct functional equivalents. Both parts maintain identical receiver hysteresis (70 mV), protocol support, and package configuration. The primary difference is packaging format: ADM485EARZ is supplied in tube packaging, while ADM485EARZ-REEL7 is supplied in cut tape with Digi-Reel format. Both are ROHS3 compliant and active products with extended operating temperature ranges (-40°C ~ 85°C) compared to the original DS3696AMX (0°C ~ 70°C).
Secondary Substitutes (Voltage Regulation Required)
For systems requiring 3V ~ 3.6V supply voltage operation, the following parts are functionally compatible with appropriate voltage regulation:
- ADM3483EARZ-REEL7 and ADM3485ARZ/ADM3485ARZ-REEL7 (Analog Devices) maintain 50 mV receiver hysteresis and are available in active production status.
- ISL3179EFBZ and ISL3179EIBZ-T (Renesas) offer superior performance with 28 mV hysteresis and extended temperature range to 125°C (ISL3179EFBZ only).
- ISL43485IBZ and ISL43485IBZ-T (Renesas) provide 50 mV hysteresis with 50 Mbps data rate capability.
All substitute parts are ROHS3 compliant and REACH unaffected, meeting regulatory requirements equivalent to the original DS3696AMX.
Frequently Asked Questions (FAQ)
Q: Can I use a 3V ~ 3.6V substitute part in a 4.75V ~ 5.25V system?
A: No. The substitute parts rated for 3V ~ 3.6V supply voltage are not rated for operation at 4.75V ~ 5.25V. Using them outside their specified voltage range may cause component failure or unpredictable behavior. Use ADM485EARZ or ADM485EARZ-REEL7 for direct voltage compatibility.
Q: What is the difference between ADM485EARZ and ADM485EARZ-REEL7?
A: Both parts are electrically identical. The difference is packaging format. ADM485EARZ is supplied in tube packaging for manual handling, while ADM485EARZ-REEL7 is supplied in cut tape on a Digi-Reel for automated assembly equipment. Select based on your manufacturing process requirements.
Q: Are all substitute parts pin-compatible with the DS3696AMX?
A: Yes. All listed substitute parts use the 8-SOIC package with identical pin spacing (0.154", 3.90mm width) and maintain the same 1/1 driver/receiver configuration for RS422/RS485 half-duplex operation.
Q: Why is ISL3180EIBZ not listed as a substitute?
A: ISL3180EIBZ is a full-duplex transceiver in a 14-SOIC package. The DS3696AMX is a half-duplex device in an 8-SOIC package. The different duplex mode and package size make ISL3180EIBZ incompatible for direct substitution.
Q: Do I need to change my PCB design to use a substitute part?
A: No. All listed substitute parts use the 8-SOIC package and maintain identical pinout for half-duplex RS422/RS485 operation. PCB layout remains unchanged. However, if selecting a 3V ~ 3.6V substitute, your power supply design must be modified to provide the appropriate voltage.
Q: What is the difference between receiver hysteresis values?
A: Receiver hysteresis affects noise immunity and signal detection thresholds. The DS3696AMX specifies 70 mV hysteresis. ADM485EARZ maintains this specification. Other substitutes (ADM3483EARZ-REEL7, ADM3485ARZ series, ISL43485IBZ series) provide 50 mV hysteresis, while ISL3179 series provides 28 mV. Lower hysteresis values may require cleaner signal conditioning in noisy environments.
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