Request Quote
(Ships tomorrow)
DS36C279M/NOPB RS422/RS485 Half Transceiver Equivalent & Substitute Parts
Part Overview
The DS36C279M/NOPB is a 1/1 half-duplex RS422/RS485 transceiver IC manufactured by Texas Instruments in an 8-SOIC surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The device operates within a 4.75V to 5.25V supply voltage range and supports industrial communication protocols requiring half-duplex transceiver functionality. Substitute parts must maintain compatibility with the 8-SOIC package format and RS422/RS485 protocol requirements while meeting the electrical specifications of the original design.
Substiute Parts
Key Parameters
| Parameter | DS36C279M/NOPB |
|---|---|
| Manufacturer | Texas Instruments |
| Type | Transceiver |
| Protocol | RS422, RS485 |
| Number of Drivers/Receivers | 1/1 |
| Duplex | Half |
| Receiver Hysteresis | 70 mV |
| Voltage - Supply | 4.75V ~ 5.25V |
| Operating Temperature | 0°C ~ 70°C |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution eligibility for the DS36C279M/NOPB is determined by the following critical parameters:
- Protocol Compatibility: All substitutes must support RS422 and RS485 protocols
- Transceiver Configuration: 1/1 driver/receiver half-duplex topology required
- Package Format: 8-SOIC surface mount package mandatory for PCB compatibility
- Supply Voltage Range: Minimum 4.75V to 5.25V operation required
- Receiver Hysteresis: Acceptable range 25 mV to 70 mV for signal integrity
- Operating Temperature: Minimum -40°C to 85°C or equivalent coverage of 0°C to 70°C
- RoHS Compliance: ROHS3 compliance required for regulatory alignment
Substitute parts are grouped by product status (Active vs. Obsolete) and extended operating temperature ranges. Active parts with wider temperature specifications provide superior long-term availability and design flexibility.
Parameter Comparison
| Part Number | Manufacturer | Protocol | Drivers/Receivers | Receiver Hysteresis | Supply Voltage | Operating Temperature | Package | Product Status | Data Rate |
|---|---|---|---|---|---|---|---|---|---|
| DS36C279M/NOPB | Texas Instruments | RS422, RS485 | 1/1 | 70 mV | 4.75V ~ 5.25V | 0°C ~ 70°C | 8-SOIC | Obsolete | — |
| SN65HVD3088ED | Texas Instruments | RS422, RS485 | 1/1 | 30 mV | 4.5V ~ 5.5V | -40°C ~ 85°C | 8-SOIC | Obsolete | 20 Mbps |
| SN65LBC176D | Texas Instruments | RS422, RS485 | 1/1 | 50 mV | 4.75V ~ 5.25V | -40°C ~ 85°C | 8-SOIC | Obsolete | — |
| SN65LBC176DR | Texas Instruments | RS422, RS485 | 1/1 | 50 mV | 4.75V ~ 5.25V | -40°C ~ 85°C | 8-SOIC | Active | — |
| SN65LBC176QD | Texas Instruments | RS422, RS485 | 1/1 | 50 mV | 4.75V ~ 5.25V | -40°C ~ 125°C | 8-SOIC | Obsolete | — |
| SN65LBC176QDR | Texas Instruments | RS422, RS485 | 1/1 | 50 mV | 4.75V ~ 5.25V | -40°C ~ 125°C | 8-SOIC | Active | — |
| SN65LBC176QDRQ1 | Texas Instruments | RS422, RS485 | 1/1 | 50 mV | 4.75V ~ 5.25V | -40°C ~ 125°C | 8-SOIC | Active | — |
| ISL31492EIBZ-T7A | Renesas Electronics Corporation | RS422, RS485 | 1/1 | 25 mV | 4.5V ~ 5.5V | -40°C ~ 85°C | 8-SOIC | Active | 250 kbps |
| LTC1481CS8#PBF | Analog Devices Inc. | RS422, RS485 | 1/1 | 45 mV | 4.75V ~ 5.25V | 0°C ~ 70°C | 8-SOIC | Active | 2.5 Mbps |
| LTC1481CS8#TRPBF | Analog Devices Inc. | RS422, RS485 | 1/1 | 45 mV | 4.75V ~ 5.25V | 0°C ~ 70°C | 8-SOIC | Active | 2.5 Mbps |
| LTC1481IS8#PBF | Analog Devices Inc. | RS422, RS485 | 1/1 | 45 mV | 4.75V ~ 5.25V | -40°C ~ 85°C | 8-SOIC | Active | 2.5 Mbps |
Engineering Selection Recommendations
Primary Recommendation for Active Production: SN65LBC176DR or SN65LBC176QDR (Texas Instruments) are the preferred substitutes. Both are active products with ROHS3 compliance, identical supply voltage specifications to the original part, and 8-SOIC package compatibility. SN65LBC176QDR extends the operating temperature range to -40°C to 125°C, providing superior thermal margin for industrial applications.
Alternative for Extended Temperature Range: SN65LBC176QDRQ1 is the automotive-qualified variant (AEC-Q100) of the SN65LBC176QDR, suitable for applications requiring automotive-grade reliability and traceability.
Cross-Manufacturer Option: LTC1481IS8#PBF (Analog Devices Inc.) provides active product status with -40°C to 85°C operating temperature coverage and identical supply voltage range. This part maintains full protocol compatibility and 8-SOIC packaging.
Extended Supply Voltage Flexibility: SN65HVD3088ED and ISL31492EIBZ-T7A both support expanded supply voltage ranges (4.5V to 5.5V), offering additional design margin for systems with variable power supplies. ISL31492EIBZ-T7A is an active Renesas product with -40°C to 85°C operation.
All recommended substitutes maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity ratings, ensuring compatibility with standard manufacturing and storage practices.
Frequently Asked Questions (FAQ)
Q: Can I directly replace DS36C279M/NOPB with SN65LBC176DR without PCB modifications? A: Yes. Both parts use identical 8-SOIC packaging, supply voltage range (4.75V to 5.25V), and RS422/RS485 protocol support. Pin-to-pin compatibility is maintained for standard half-duplex transceiver applications.
Q: What is the difference between SN65LBC176DR and SN65LBC176QDR? A: The primary difference is operating temperature range. SN65LBC176DR operates from -40°C to 85°C, while SN65LBC176QDR extends to -40°C to 125°C. Both are active products with identical electrical specifications and packaging.
Q: Why does SN65HVD3088ED have a lower receiver hysteresis (30 mV) than the original part (70 mV)? A: Lower receiver hysteresis improves noise immunity in high-speed applications. SN65HVD3088ED supports 20 Mbps data rates compared to the original part's unspecified rate. The 30 mV hysteresis remains within acceptable RS422/RS485 specifications and is suitable for most industrial communication systems.
Q: Is LTC1481IS8#PBF compatible with the original operating temperature range? A: LTC1481IS8#PBF extends the operating temperature range to -40°C to 85°C, which exceeds the original 0°C to 70°C specification. This provides superior thermal coverage for industrial and extended-temperature applications.
Q: What does the "Q1" suffix in SN65LBC176QDRQ1 indicate? A: The Q1 suffix denotes automotive qualification under AEC-Q100 standards. This variant is suitable for automotive and mission-critical applications requiring enhanced reliability documentation and traceability.
Q: Can I use ISL31492EIBZ-T7A as a direct substitute? A: Yes, with consideration for the extended supply voltage range (4.5V to 5.5V). ISL31492EIBZ-T7A is an active Renesas product with full RS422/RS485 protocol support, 8-SOIC packaging, and -40°C to 85°C operation. The lower receiver hysteresis (25 mV) improves signal integrity in noise-sensitive environments.
Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity ratings, ensuring compatibility with modern manufacturing standards and long-term storage without special handling.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts