DS3695ATMX Equivalent & Substitute Parts

Part Overview

The DS3695ATMX is a 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 substitute parts necessary for new designs and ongoing production requirements. The DS3695ATMX operates within a 4.75V to 5.25V supply voltage range with a receiver hysteresis of 70 mV, designed for industrial communication applications requiring reliable half-duplex serial data transmission.

Key Parameters

Parameter	DS3695ATMX
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS422, RS485
Duplex Configuration	Half
Number of Drivers/Receivers	1/1
Receiver Hysteresis	70 mV
Voltage Supply Range	4.75V ~ 5.25V
Operating Temperature	0°C ~ 70°C
Package Type	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the DS3695ATMX is determined by the following critical parameters:

Primary Compatibility Criteria:

Protocol support: RS422 and RS485 half-duplex operation
Duplex configuration: Half-duplex only
Driver/Receiver configuration: 1/1 (single driver, single receiver)
Package footprint: 8-SOIC (0.154", 3.90mm Width) for direct PCB compatibility
Supply voltage range: Minimum 4.75V to 5.25V operation
Receiver hysteresis: 70 mV specification

Secondary Selection Factors:

Product status: Active parts are preferred over obsolete classifications
RoHS compliance: ROHS3 compliant alternatives are available
Operating temperature range: Extended temperature variants (-40°C to 85°C) provide broader application scope
Data rate capability: Varies across substitutes from 250 kbps to 20 Mbps
Packaging options: Cut Tape, Tube, and Reel configurations affect procurement and assembly

All substitute parts listed maintain electrical and mechanical compatibility with the DS3695ATMX within the specified parameter constraints.

Parameter Comparison

Part Number	Manufacturer	Protocol	Duplex	Drivers/Receivers	Receiver Hysteresis	Supply Voltage	Operating Temp	Package	Data Rate	Product Status	RoHS Status
DS3695ATMX	Texas Instruments	RS422, RS485	Half	1/1	70 mV	4.75V ~ 5.25V	0°C ~ 70°C	8-SOIC	—	Obsolete	RoHS non-compliant
ADM485ARZ	UMW	RS422, RS485	Half	1/1	70 mV	4.75V ~ 5.25V	0°C ~ 70°C	8-SOIC	2.5 Mbps	Active	ROHS3 Compliant
ADM485ARZ-REEL	Analog Devices Inc.	RS422, RS485	Half	1/1	70 mV	4.75V ~ 5.25V	-40°C ~ 85°C	8-SOIC	5 Mbps	Active	ROHS3 Compliant
ADM485JRZ	Analog Devices Inc.	RS422, RS485	Half	1/1	70 mV	4.75V ~ 5.25V	0°C ~ 70°C	8-SOIC	5 Mbps	Active	ROHS3 Compliant
ADM485JRZ-REEL	Analog Devices Inc.	RS422, RS485	Half	1/1	70 mV	4.75V ~ 5.25V	0°C ~ 70°C	8-SOIC	5 Mbps	Active	ROHS3 Compliant
ADM485JRZ-REEL7	Analog Devices Inc.	RS422, RS485	Half	1/1	70 mV	4.75V ~ 5.25V	0°C ~ 70°C	8-SOIC	5 Mbps	Active	ROHS3 Compliant
HI-4853PSHF	Holt Integrated Circuits Inc.	RS422, RS485	Half	1/1	—	3.15V ~ 5.5V	-55°C ~ 175°C	8-SOIC	20 Mbps	Active	ROHS3 Compliant
LT1785ACS8#PBF	Analog Devices Inc.	RS422, RS485	Half	1/1	20 mV	4.75V ~ 5.25V	0°C ~ 70°C	8-SOIC	250 kbps	Active	ROHS3 Compliant
LT1785ACS8#TRPBF	Analog Devices Inc.	RS422, RS485	Half	1/1	20 mV	4.75V ~ 5.25V	0°C ~ 70°C	8-SOIC	250 kbps	Active	ROHS3 Compliant
LT1785AIS8#PBF	Analog Devices Inc.	RS422, RS485	Half	1/1	20 mV	4.75V ~ 5.25V	-40°C ~ 85°C	8-SOIC	250 kbps	Active	ROHS3 Compliant
LT1785AIS8#TRPBF	Analog Devices Inc.	RS422, RS485	Half	1/1	20 mV	4.75V ~ 5.25V	-40°C ~ 85°C	8-SOIC	250 kbps	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

The ADM485 series from Analog Devices Inc. (ADM485ARZ, ADM485ARZ-REEL, ADM485JRZ, ADM485JRZ-REEL, ADM485JRZ-REEL7) provides direct electrical and mechanical equivalence to the DS3695ATMX. All variants maintain the 70 mV receiver hysteresis specification, identical supply voltage range, and 8-SOIC package footprint. These parts are active products with ROHS3 compliance, addressing the obsolescence and regulatory concerns of the original part. The ADM485ARZ-REEL variant extends the operating temperature range to -40°C to 85°C, suitable for industrial environments requiring broader thermal performance.

Extended Temperature Alternative:

The HI-4853PSHF from Holt Integrated Circuits Inc. offers the widest operating temperature range (-55°C to 175°C) and highest data rate capability (20 Mbps) among available substitutes. This part maintains RS422/RS485 half-duplex operation with 1/1 driver/receiver configuration and 8-SOIC packaging. The supply voltage range extends to 3.15V to 5.5V, providing additional flexibility for low-power applications. This option is suitable for extreme environment applications where standard industrial temperature ranges are insufficient.

Lower Data Rate Alternative:

The LT1785 series (LT1785ACS8#PBF, LT1785ACS8#TRPBF, LT1785AIS8#PBF, LT1785AIS8#TRPBF) from Analog Devices Inc. maintains full RS422/RS485 half-duplex compatibility with identical supply voltage specifications. These parts feature a 20 mV receiver hysteresis specification and 250 kbps data rate, suitable for legacy communication protocols and noise-sensitive applications. The LT1785AIS8 variants support extended temperature operation (-40°C to 85°C), while LT1785ACS8 variants operate within 0°C to 70°C.

Selection Criteria:

For direct replacement in existing designs: ADM485JRZ or ADM485JRZ-REEL
For extended temperature requirements: ADM485ARZ-REEL or HI-4853PSHF
For high-speed applications: HI-4853PSHF (20 Mbps capability)
For legacy low-speed systems: LT1785 series variants
For RoHS compliance: All listed substitutes except DS3695ATMX

Frequently Asked Questions (FAQ)

Q: Can the ADM485 series directly replace the DS3695ATMX without PCB modifications?

A: Yes. The ADM485 series maintains identical 8-SOIC package dimensions, pin configuration, and electrical specifications including 70 mV receiver hysteresis and 4.75V to 5.25V supply voltage range. No PCB layout changes are required for direct substitution.

Q: What is the primary difference between ADM485ARZ and ADM485JRZ variants?

A: Both variants maintain identical electrical specifications and 8-SOIC packaging. The primary difference is operating temperature range: ADM485ARZ operates 0°C to 70°C, while ADM485JRZ also operates 0°C to 70°C. The ADM485ARZ-REEL variant extends to -40°C to 85°C for industrial applications requiring broader thermal performance.

Q: Why does the HI-4853PSHF have different receiver hysteresis specifications?

A: The HI-4853PSHF datasheet does not specify receiver hysteresis in the provided parameters. This part is suitable for applications where hysteresis specification is not a critical design constraint. Consult the manufacturer datasheet for detailed receiver threshold specifications.

Q: Are all substitute parts RoHS compliant?

A: All listed substitute parts are ROHS3 compliant. The original DS3695ATMX is RoHS non-compliant, making the substitutes suitable for applications requiring regulatory compliance with modern environmental standards.

Q: What packaging options are available for the ADM485 series?

A: The ADM485 series is available in multiple packaging configurations: ADM485ARZ (Cut Tape & Digi-Reel), ADM485ARZ-REEL (Cut Tape & Digi-Reel), ADM485JRZ (Tube), ADM485JRZ-REEL (Cut Tape & Digi-Reel), and ADM485JRZ-REEL7 (Cut Tape & Digi-Reel). Selection depends on procurement and assembly requirements.

Q: Can the LT1785 series be used in high-speed RS485 networks?

A: The LT1785 series is rated for 250 kbps data rate, suitable for standard industrial RS485 applications. For high-speed networks exceeding 250 kbps, the ADM485 series (2.5 to 5 Mbps) or HI-4853PSHF (20 Mbps) are recommended.

Q: What is the inventory status of substitute parts?

A: All substitute parts listed are in active production with substantial inventory availability: ADM485ARZ (29,020 pcs), ADM485ARZ-REEL (20,200 pcs), ADM485JRZ (25,600 pcs), ADM485JRZ-REEL (44,354 pcs), ADM485JRZ-REEL7 (15,953 pcs), HI-4853PSHF (23,832 pcs), LT1785ACS8#PBF (1,396 pcs), LT1785ACS8#TRPBF (2,242 pcs), LT1785AIS8#PBF (1,581 pcs), and LT1785AIS8#TRPBF (18,997 pcs).

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