DS9637ACN Equivalent & Substitute Parts

Part Overview

The DS9637ACN is a 0/2 Receiver IC for RS232 and RS423 serial communication protocols, manufactured by Texas Instruments in an 8-MDIP through-hole package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance, repairs, and legacy design support. The DS9637ACN provides receiver functionality with 70 mV hysteresis and operates within a 4.75V to 5.25V supply voltage range across a 0°C to 70°C temperature range.

Substiute Parts

DS9637ACN

Texas InstrumentsIn Stock: 2540DS9637ACN Datasheet

Current PartRFQ

UA9637ACP

Texas InstrumentsIn Stock: 4956UA9637ACP Datasheet

DirectRFQ

UA9639CP

Texas InstrumentsIn Stock: 20586UA9639CP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DS9637ACN is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Number of Drivers/Receivers: 0/2 (must match)
• Receiver Hysteresis: 70 mV (must match)
• Voltage - Supply: 4.75V ~ 5.25V (must match)
• Operating Temperature: 0°C ~ 70°C (must match)
• Protocol Support: RS232, RS423 or compatible protocols (RS422, RS423 acceptable)

Mechanical Compatibility Requirements:

• Mounting Type: Through Hole (must match)
• Package / Case: 8-DIP (0.300", 7.62mm) (must match)

Identified Substitute Parts:

1. UA9637ACP (Direct Manufacturer Equivalent) – Meets all electrical parameters with RS422/RS423 protocol support. RoHS3 compliant. 8-PDIP package variant of same physical dimensions.

2. UA9639CP (Manufacturer Recommended Substitute) – Meets all electrical parameters with RS422/RS423 protocol support. RoHS3 compliant. 8-PDIP package variant of same physical dimensions. Highest inventory availability.

Parameter Comparison

Engineering Selection Recommendations

For RoHS3 Compliance Requirements: Select UA9637ACP or UA9639CP. Both parts are ROHS3 compliant, addressing regulatory requirements that the original DS9637ACN does not meet. UA9639CP offers the highest inventory availability (20,566 pcs) for production applications.

For Legacy System Maintenance: UA9637ACP provides direct functional equivalence with improved compliance status. The part maintains identical electrical specifications and physical package dimensions, ensuring drop-in compatibility in existing through-hole PCB designs.

For New Design Implementation: UA9639CP is the manufacturer-recommended substitute, offering superior inventory levels and ROHS3 compliance certification. All three parts share identical receiver hysteresis, supply voltage range, and operating temperature specifications.

Compliance Consideration: The original DS9637ACN is RoHS non-compliant. Both substitute parts achieve ROHS3 compliance, making them suitable for applications subject to RoHS directives.

Frequently Asked Questions (FAQ)

Q: Can UA9637ACP directly replace DS9637ACN in existing designs? A: Yes. UA9637ACP maintains identical electrical parameters (70 mV hysteresis, 4.75V–5.25V supply, 0°C–70°C operating range) and physical package dimensions (8-DIP, 0.300" spacing). The part is a through-hole component suitable for direct PCB substitution.

Q: What is the difference between UA9637ACP and UA9639CP? A: Both parts meet all electrical compatibility requirements for DS9637ACN substitution. UA9639CP is the manufacturer-recommended option with significantly higher inventory availability (20,566 pcs vs. 4,938 pcs). Both are ROHS3 compliant.

Q: Does protocol support difference (RS232/RS423 vs. RS422/RS423) affect substitution? A: No. RS422 and RS423 protocols are compatible with RS232/RS423 applications at the receiver level. The 0/2 receiver configuration and 70 mV hysteresis specification ensure functional equivalence in serial communication circuits.

Q: Are the package variants (8-MDIP vs. 8-PDIP) interchangeable? A: Yes. Both 8-MDIP and 8-PDIP are 8-DIP packages with identical 0.300" (7.62mm) pitch and physical dimensions. They are mechanically and electrically interchangeable in through-hole PCB applications.

Q: Which substitute part should be selected for new production? A: UA9639CP is recommended for new production due to manufacturer recommendation status and highest inventory availability. For existing legacy system repairs, UA9637ACP provides direct equivalence with improved compliance.

Q: Are these parts suitable for applications requiring RoHS compliance? A: Yes. Both UA9637ACP and UA9639CP are ROHS3 compliant. The original DS9637ACN is RoHS non-compliant and should be replaced with either substitute for RoHS-regulated applications.