SN75157P-P2 Equivalent & Substitute Parts

Part Overview

The SN75157P-P2 is a 0/2 Receiver IC for RS422 and RS423 serial communication protocols, manufactured by Texas Instruments in an 8-DIP through-hole package. This component is classified as obsolete, indicating that Texas Instruments has discontinued active production and support. For applications requiring continued supply, maintenance, or new designs, identifying functionally equivalent active alternatives is essential to ensure long-term component availability and design sustainability.

Substiute Parts

SN75157P-P2

Texas InstrumentsIn Stock: 1065SN75157P-P2 Datasheet

Current PartRFQ

SN75157P

Texas InstrumentsIn Stock: 3017SN75157P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN75157P-P2 is determined by strict equivalence across the following critical parameters:

Protocol Compatibility: Both the main part and substitute must support RS422 and RS423 serial communication standards.

Receiver Configuration: The 0/2 receiver configuration (zero drivers, two receivers) must be maintained to ensure functional compatibility with existing circuit designs.

Electrical Specifications: Supply voltage range (4.75V ~ 5.25V), receiver hysteresis (70 mV), and operating temperature range (0°C ~ 70°C) must remain identical.

Package Compatibility: The 8-DIP through-hole package with 0.300" (7.62mm) spacing is required for direct board-level substitution without layout modifications.

Compliance Standards: RoHS3 compliance status must be maintained for regulatory and procurement consistency.

The SN75157P (without the -P2 suffix) qualifies as a direct substitute based on these parameters. The primary distinction is product status: SN75157P is active, whereas SN75157P-P2 is obsolete.

Parameter Comparison

Engineering Selection Recommendations

For Obsolete Part Replacement: The SN75157P is the direct substitute for SN75157P-P2. Both components are manufactured by Texas Instruments and maintain identical electrical and mechanical specifications. The SN75157P is currently in active production status, ensuring ongoing availability and supply chain stability.

For Compliance and Certification: Both parts maintain ROHS3 compliance, satisfying regulatory requirements for new designs and procurement processes. The SN75157P additionally carries REACH Unaffected status and EAR99 export classification, providing additional documentation for compliance-sensitive applications.

For Inventory and Supply: The SN75157P demonstrates significantly higher inventory availability (2973 pieces) compared to the obsolete SN75157P-P2 variant, supporting both immediate procurement needs and long-term supply assurance.

For Design Continuity: Direct substitution of SN75157P for SN75157P-P2 requires no circuit modifications, PCB layout changes, or firmware adjustments. Pin configuration, electrical performance, and functional behavior remain identical.

Frequently Asked Questions (FAQ)

Q: Can SN75157P directly replace SN75157P-P2 without circuit modifications?

A: Yes. Both parts are electrically and mechanically identical. The SN75157P can be substituted directly into existing designs using SN75157P-P2 without any changes to schematic, PCB layout, or firmware.

Q: What is the difference between SN75157P-P2 and SN75157P?

A: The primary difference is product status. SN75157P-P2 is obsolete and no longer manufactured. SN75157P is the active equivalent with identical specifications. The "-P2" suffix typically indicates a specific manufacturing or packaging variant that has been discontinued.

Q: Are the package dimensions identical?

A: Yes. Both parts use the 8-DIP package with 0.300" (7.62mm) spacing. Pin-to-pin dimensions, lead spacing, and through-hole mounting requirements are identical, enabling direct PCB compatibility.

Q: Does SN75157P meet the same compliance standards?

A: Yes. SN75157P maintains ROHS3 compliance identical to SN75157P-P2. Additionally, SN75157P carries REACH Unaffected status and EAR99 export classification documentation.

Q: What is the receiver hysteresis specification, and why is it important?

A: Receiver hysteresis is specified at 70 mV for both parts. This parameter defines the voltage difference between the rising and falling threshold levels, ensuring stable signal detection in RS422/RS423 communication and preventing false triggering from noise.

Q: Can these parts be used interchangeably in new designs?

A: Yes. SN75157P is recommended for new designs requiring RS422/RS423 receiver functionality. The active product status ensures long-term availability and manufacturing support.

Q: What supply voltage range is supported?

A: Both parts operate with a supply voltage range of 4.75V to 5.25V, supporting standard 5V logic systems with typical ±5% tolerance margins.