TL3695P RS422/RS485 Half Transceiver Equivalent & Substitute Parts

Part Overview

The TL3695P is a 1/1 half-duplex RS422/RS485 transceiver manufactured by Texas Instruments in 8-DIP through-hole packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing system support. The TL3695P operates within a 4.75V to 5.25V supply range with a 120 mV receiver hysteresis specification and is suitable for industrial communication applications requiring half-duplex serial data transmission.

Key Parameters

Parameter	TL3695P
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS422, RS485
Number of Drivers/Receivers	1/1
Duplex	Half
Receiver Hysteresis	120 mV
Voltage - Supply	4.75V ~ 5.25V
Operating Temperature	0°C ~ 70°C
Mounting Type	Through Hole
Package / Case	8-DIP (0.300", 7.62mm)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the TL3695P is determined by the following critical parameters:

Protocol Support: RS422 and/or RS485 capability
Transceiver Configuration: 1/1 driver/receiver ratio with half-duplex operation
Electrical Compatibility: Supply voltage range and receiver hysteresis
Package Type: Through-hole 8-DIP mounting for direct PCB compatibility
Operating Temperature Range: Minimum coverage of the original 0°C to 70°C specification
Compliance: ROHS3 compliance and EAR99 classification

Substitute parts are grouped into two categories:

Category A - Direct Package Replacement (8-DIP Through-Hole): ISL81487EIPZ, LT1785ACN8#PBF, LT1785AIN8#PBF, LT1785IN8#PBF. These parts maintain identical through-hole 8-DIP packaging, enabling direct PCB substitution without layout modifications.

Category B - Package Variant (Surface Mount): THVD1550DR. This part provides functional equivalence but requires PCB redesign due to 8-SOIC surface-mount packaging. Selection of this variant is appropriate only when PCB layout modifications are feasible.

Parameter Comparison

Parameter	TL3695P	THVD1550DR	ISL81487EIPZ	LT1785ACN8#PBF	LT1785AIN8#PBF	LT1785IN8#PBF
Manufacturer	Texas Instruments	Texas Instruments	Renesas Electronics	Analog Devices	Analog Devices	Analog Devices
Type	Transceiver	Transceiver	Transceiver	Transceiver	Transceiver	Transceiver
Protocol	RS422, RS485	RS485	RS422, RS485	RS422, RS485	RS422, RS485	RS422, RS485
Number of Drivers/Receivers	1/1	1/1	1/1	1/1	1/1	1/1
Duplex	Half	Half	Half	Half	Half	Half
Receiver Hysteresis	120 mV	50 mV	70 mV	20 mV	20 mV	20 mV
Voltage - Supply	4.75V ~ 5.25V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.75V ~ 5.25V	4.75V ~ 5.25V	4.75V ~ 5.25V
Operating Temperature	0°C ~ 70°C	-40°C ~ 125°C	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Through Hole	Surface Mount	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	8-DIP (0.300", 7.62mm)	8-SOIC (0.154", 3.90mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct PCB Substitution (No Layout Changes Required)

The LT1785 series (LT1785ACN8#PBF, LT1785AIN8#PBF, LT1785IN8#PBF) and ISL81487EIPZ maintain 8-DIP through-hole packaging identical to the TL3695P. All substitute parts are active products with ROHS3 compliance and EAR99 classification, ensuring regulatory alignment with the original part.

LT1785AIN8#PBF and LT1785IN8#PBF offer extended operating temperature ranges (-40°C to 85°C) compared to the TL3695P (0°C to 70°C), providing enhanced thermal performance for industrial environments. LT1785ACN8#PBF maintains the original 0°C to 70°C temperature range. ISL81487EIPZ provides -40°C to 85°C operation with 5 Mbps data rate specification.

For Surface-Mount Applications (PCB Redesign Required)

THVD1550DR is a Texas Instruments active product in 8-SOIC surface-mount packaging. This part supports RS485 protocol with extended operating temperature (-40°C to 125°C) and supply voltage range (4.5V to 5.5V). Selection of THVD1550DR requires PCB layout modification and is appropriate only when surface-mount assembly is feasible.

Frequently Asked Questions (FAQ)

Q: Can the TL3695P be directly replaced with THVD1550DR on existing PCBs?

A: No. THVD1550DR uses 8-SOIC surface-mount packaging, while TL3695P uses 8-DIP through-hole packaging. Direct PCB substitution is not possible without layout redesign. For direct replacement, use LT1785 series or ISL81487EIPZ parts, which maintain 8-DIP through-hole packaging.

Q: What is the difference between LT1785ACN8#PBF, LT1785AIN8#PBF, and LT1785IN8#PBF?

A: All three parts are Analog Devices LT1785 transceivers in 8-DIP packaging with identical electrical specifications (20 mV receiver hysteresis, 250 kbps data rate, 4.75V to 5.25V supply). The primary difference is operating temperature range: LT1785ACN8#PBF operates 0°C to 70°C (matching TL3695P), while LT1785AIN8#PBF and LT1785IN8#PBF operate -40°C to 85°C. Select based on your application's thermal requirements.

Q: Does ISL81487EIPZ support both RS422 and RS485 protocols?

A: Yes. ISL81487EIPZ is a Renesas Electronics 1/1 half-duplex transceiver supporting both RS422 and RS485 protocols in 8-DIP through-hole packaging. It operates at -40°C to 85°C with 70 mV receiver hysteresis and 5 Mbps data rate.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed (THVD1550DR, ISL81487EIPZ, LT1785ACN8#PBF, LT1785AIN8#PBF, LT1785IN8#PBF) are ROHS3 compliant and classified as EAR99, matching the regulatory status of the original TL3695P.

Q: Which substitute part has the highest data rate specification?

A: THVD1550DR specifies 50 Mbps data rate. ISL81487EIPZ specifies 5 Mbps. LT1785 series parts specify 250 kbps. Select based on your application's communication speed requirements.

Q: Can I use a substitute part with a wider operating temperature range in place of the TL3695P?

A: Yes. Parts with extended temperature ranges (such as LT1785AIN8#PBF and LT1785IN8#PBF at -40°C to 85°C, or THVD1550DR at -40°C to 125°C) are functionally compatible with applications designed for the TL3695P's 0°C to 70°C range. The wider range provides additional thermal margin without compromising performance within the original specification.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message