DS9637ACM/NOPB Equivalent & Substitute Parts

Part Overview

The DS9637ACM/NOPB is a 0/2 Receiver IC for RS422 and RS423 protocols, manufactured by Texas Instruments in an 8-SOIC surface mount package. This part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production support. The receiver features 70 mV hysteresis and operates within a 4.75V to 5.25V supply voltage range, suitable for industrial and commercial serial communication applications.

Substiute Parts

DS9637ACM/NOPB

Texas InstrumentsIn Stock: 868DS9637ACM/NOPB Datasheet

Current PartRFQ

UA9637ACDR

Texas InstrumentsIn Stock: 66454UA9637ACDR Datasheet

MFR RecommendedRFQ

SN75157D

Texas InstrumentsIn Stock: 3150SN75157D Datasheet

Parametric EquivalentRFQ

UA9637ACD

Texas InstrumentsIn Stock: 2593UA9637ACD Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the DS9637ACM/NOPB is determined by strict equivalence across the following critical parameters:

• Protocol compatibility: RS422 and RS423
• Receiver configuration: 0/2 (zero drivers, two receivers)
• Receiver hysteresis: 70 mV
• Supply voltage range: 4.75V ~ 5.25V
• Operating temperature range: 0°C ~ 70°C
• Package type: 8-SOIC surface mount
• Electrical and mechanical pin compatibility

All substitute parts listed maintain identical electrical specifications and physical packaging, ensuring direct functional replacement without circuit redesign.

Parameter Comparison

Engineering Selection Recommendations

UA9637ACDR is the primary recommended substitute. This part carries Active product status from Texas Instruments, ensuring ongoing availability and manufacturing support. It is supplied in Cut Tape and Digi-Reel packaging formats, facilitating both prototype and production-volume procurement. The MSL rating of 2 (1 Year) is suitable for standard manufacturing environments.

SN75157D and UA9637ACD are secondary alternatives classified as Last Time Buy. These parts remain available in current inventory but represent end-of-life products with limited future availability. SN75157D is supplied in Tube packaging; UA9637ACD is supplied in Tube packaging. Both maintain full electrical and mechanical compatibility with the DS9637ACM/NOPB.

All three substitute parts comply with ROHS3 and REACH regulations, matching the compliance profile of the original part.

Frequently Asked Questions (FAQ)

Q: Can UA9637ACDR directly replace DS9637ACM/NOPB in existing designs?

A: Yes. The UA9637ACDR maintains identical electrical specifications (RS422/RS423 protocol, 0/2 receiver configuration, 70 mV hysteresis, 4.75V–5.25V supply voltage, 0°C–70°C operating range) and physical packaging (8-SOIC surface mount). No circuit modifications are required.

Q: What is the difference between the substitute parts?

A: All three substitutes (UA9637ACDR, SN75157D, UA9637ACD) are electrically and mechanically equivalent. The primary differences are product status and packaging format. UA9637ACDR is Active with reel packaging; SN75157D and UA9637ACD are Last Time Buy with tube packaging.

Q: Why is DS9637ACM/NOPB classified as obsolete?

A: The original part has reached end-of-life status. Texas Instruments has transitioned production to the UA9637ACDR variant, which offers the same functionality with improved availability and manufacturing support.

Q: Are there any MSL (Moisture Sensitivity Level) considerations?

A: DS9637ACM/NOPB carries MSL 1 (Unlimited). UA9637ACDR carries MSL 2 (1 Year), requiring standard moisture control during storage and handling. SN75157D and UA9637ACD carry MSL 1 (Unlimited). For applications with extended storage periods, MSL 1 parts may be preferred.

Q: Can these parts be used interchangeably in production?

A: Yes, provided supply chain and packaging requirements are met. UA9637ACDR is recommended for new production due to Active status. SN75157D and UA9637ACD may be used as interim solutions but should not be specified for long-term production programs.