DS75176BTMX Equivalent & Substitute Parts

Part Overview

The DS75176BTMX is a half-duplex RS422/RS485 transceiver IC manufactured by Texas Instruments in an 8-SOIC surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The DS75176BTMX operates within a 4.75V to 5.25V supply voltage range and supports half-duplex communication protocols with a 70 mV receiver hysteresis specification. Identifying compatible substitutes ensures design continuity and supply chain flexibility.

Key Parameters

Parameter	DS75176BTMX
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS422, RS485
Duplex Mode	Half
Number of Drivers/Receivers	1/1
Package / Case	8-SOIC (0.154", 3.90mm Width)
Voltage - Supply	4.75V ~ 5.25V
Operating Temperature	-40°C ~ 85°C
Receiver Hysteresis	70 mV
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the DS75176BTMX is determined by the following critical parameters: protocol support (RS422/RS485), duplex mode (half-duplex), driver/receiver configuration (1/1), package type (8-SOIC), and supply voltage compatibility. The DS75176BTMX operates at 4.75V to 5.25V, which restricts direct substitution to parts supporting this voltage range or wider ranges that encompass it.

Substitute parts are grouped into two categories:

Category 1: Direct Half-Duplex Substitutes (8-SOIC Package) Parts maintaining identical duplex mode, driver/receiver count, and 8-SOIC packaging. These include LT1785 series devices from Analog Devices and MAX14783 series from Maxim Integrated, all supporting the required 4.75V to 5.25V supply voltage range.

Category 2: Enhanced Specification Alternatives Parts offering improved performance characteristics such as lower receiver hysteresis, higher data rates, or extended temperature ranges, while maintaining functional equivalence. ISL3179EFBZ from Renesas Electronics operates at 3V to 3.6V and requires voltage level consideration but offers 40Mbps data rate capability.

Parameter Comparison

Part Number	Manufacturer	Duplex	Package	Voltage Supply	Operating Temp	Receiver Hysteresis	Data Rate	Product Status	RoHS Status
DS75176BTMX	Texas Instruments	Half	8-SOIC	4.75V ~ 5.25V	-40°C ~ 85°C	70 mV	—	Obsolete	RoHS non-compliant
LT1785AIS8#PBF	Analog Devices Inc.	Half	8-SOIC	4.75V ~ 5.25V	-40°C ~ 85°C	20 mV	250kbps	Active	ROHS3 Compliant
LT1785AIS8#TRPBF	Analog Devices Inc.	Half	8-SOIC	4.75V ~ 5.25V	-40°C ~ 85°C	20 mV	250kbps	Active	ROHS3 Compliant
LT1785IS8#PBF	Analog Devices Inc.	Half	8-SOIC	4.75V ~ 5.25V	-40°C ~ 85°C	20 mV	250kbps	Active	ROHS3 Compliant
LT1785IS8#TRPBF	Analog Devices Inc.	Half	8-SOIC	4.75V ~ 5.25V	-40°C ~ 85°C	20 mV	250kbps	Active	ROHS3 Compliant
MAX14783EASA+	Analog Devices Inc./Maxim Integrated	Half	8-SOIC	3V ~ 5.5V	-40°C ~ 125°C	10 mV	42Mbps	Active	ROHS3 Compliant
MAX14783EESA+	Analog Devices Inc./Maxim Integrated	Half	8-SOIC	3V ~ 5.5V	-40°C ~ 85°C	10 mV	42Mbps	Active	ROHS3 Compliant
MAX14783EESA+T	Analog Devices Inc./Maxim Integrated	Half	8-SOIC	3V ~ 5.5V	-40°C ~ 85°C	10 mV	42Mbps	Active	ROHS3 Compliant
ISL3179EFBZ	Renesas Electronics Corporation	Half	8-SOIC	3V ~ 3.6V	-40°C ~ 125°C	28 mV	40Mbps	Active	ROHS3 Compliant
ISL3179EFBZ-T	Renesas Electronics Corporation	Half	8-SOIC	3V ~ 3.6V	-40°C ~ 125°C	28 mV	40Mbps	Active	ROHS3 Compliant
ISL3180EIBZ	Renesas Electronics Corporation	Full	14-SOIC	3V ~ 3.6V	-40°C ~ 85°C	28 mV	40Mbps	Active	ROHS3 Compliant

Engineering Selection Recommendations

For applications requiring direct functional replacement of the DS75176BTMX with minimal design modification, the LT1785 series (LT1785AIS8#PBF, LT1785AIS8#TRPBF, LT1785IS8#PBF, LT1785IS8#TRPBF) from Analog Devices provides the closest match. These devices maintain identical supply voltage range (4.75V to 5.25V), operating temperature range (-40°C to 85°C), and 8-SOIC packaging. All LT1785 variants are ROHS3 compliant and carry active product status, ensuring long-term availability and supply chain stability.

The MAX14783 series (MAX14783EASA+, MAX14783EESA+, MAX14783EESA+T) offers extended supply voltage range (3V to 5.5V) and superior performance specifications including 42Mbps data rate and 10 mV receiver hysteresis. MAX14783EASA+ supports extended operating temperature (-40°C to 125°C), while MAX14783EESA+ and MAX14783EESA+T are rated to -40°C to 85°C. All variants are ROHS3 compliant and actively produced.

The ISL3179EFBZ and ISL3179EFBZ-T from Renesas Electronics are suitable for applications where 3V to 3.6V supply voltage is available. These parts provide 40Mbps data rate and extended temperature range (-40°C to 125°C) but require voltage level translation if the original 5V supply is retained.

The ISL3180EIBZ is a full-duplex alternative with 14-SOIC packaging, suitable only for designs where full-duplex operation and larger package footprint are acceptable.

Frequently Asked Questions (FAQ)

Q: Can the LT1785 series directly replace the DS75176BTMX without PCB modifications?

A: Yes. The LT1785 series maintains identical 8-SOIC packaging, supply voltage range (4.75V to 5.25V), and operating temperature specifications (-40°C to 85°C). Pin-to-pin compatibility and functional equivalence allow direct substitution without PCB layout changes.

Q: What is the difference between LT1785AIS8 and LT1785IS8 variants?

A: Both variants are functionally equivalent half-duplex RS422/RS485 transceivers with identical electrical specifications. The designation difference reflects internal grading or manufacturing process variations. Both are ROHS3 compliant and actively produced.

Q: Why does the MAX14783 series specify a wider supply voltage range (3V to 5.5V) than the original DS75176BTMX (4.75V to 5.25V)?

A: The MAX14783 series is designed for broader application flexibility, supporting both 3.3V and 5V logic systems. When used in 5V systems, the 4.75V to 5.25V operating window remains valid. The wider specification does not compromise compatibility with the original 5V supply range.

Q: Is the ISL3179EFBZ suitable as a direct replacement if my system operates at 5V?

A: No. The ISL3179EFBZ operates at 3V to 3.6V supply voltage and cannot be directly substituted into a 5V system without external voltage regulation or level translation circuitry. Use LT1785 or MAX14783 series for 5V applications.

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

A: LT1785 series is available in Tube (PBF suffix) and Cut Tape/Digi-Reel (TRPBF suffix) packaging. MAX14783 series is available in Tube (EASA+, EESA+) and Cut Tape/Digi-Reel (EESA+T) packaging. ISL3179 series is available in Tube (EFBZ) and Tape & Reel (EFBZ-T) packaging. All maintain 8-SOIC form factor except ISL3180EIBZ, which uses 14-SOIC.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All active substitute parts listed (LT1785 series, MAX14783 series, ISL3179 series, and ISL3180EIBZ) are ROHS3 compliant. The original DS75176BTMX is RoHS non-compliant due to its obsolete status.

Q: What is the inventory status for these substitute parts?

A: LT1785IS8#TRPBF has the highest inventory (79,800 pcs), followed by MAX14783EESA+T (105,100 pcs). All listed substitutes maintain active production status with available stock, ensuring supply continuity.

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