DS8923AN/NOPB Equivalent & Substitute Parts

Part Overview

The DS8923AN/NOPB is a 2/2 transceiver IC with full-duplex RS422 and RS485 protocol support, manufactured by Texas Instruments in a 16-PDIP through-hole package. This component is classified as obsolete, making equivalent substitutes necessary for new designs and production continuity. The part operates within a 4.5V to 5.5V supply voltage range and is suitable for industrial communication applications requiring dual-channel transceiver functionality.

Substiute Parts

DS8923AN/NOPB

Texas InstrumentsIn Stock: 711DS8923AN/NOPB Datasheet

Current PartRFQ

ADM4168EBRUZ

Analog Devices Inc.In Stock: 18240ADM4168EBRUZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DS8923AN/NOPB is determined by the following critical parameters:

• Protocol Compatibility: Substitute parts must support both RS422 and RS485 protocols
• Channel Configuration: 2/2 driver/receiver configuration is mandatory
• Duplex Mode: Full-duplex operation is required
• Supply Voltage: 4.5V to 5.5V operating range must be maintained
• Electrical Characteristics: Receiver hysteresis and signal integrity parameters must be compatible
• Compliance: RoHS3 compliance and REACH unaffected status must be preserved

The ADM4168EBRUZ from Analog Devices Inc. meets all functional and electrical requirements for substitution. While the package format differs (16-TSSOP surface mount versus 16-PDIP through hole), the electrical specifications and protocol support enable direct functional replacement with appropriate PCB layout modifications.

Parameter Comparison

Engineering Selection Recommendations

The ADM4168EBRUZ is the qualified substitute for the obsolete DS8923AN/NOPB based on the following factors:

• Functional Equivalence: Both parts provide identical 2/2 full-duplex RS422/RS485 transceiver functionality with matching supply voltage specifications
• Active Product Status: The ADM4168EBRUZ is an active product with ongoing manufacturer support and availability, addressing the obsolescence of the original part
• Compliance Alignment: Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity
• Extended Operating Range: The ADM4168EBRUZ supports a wider operating temperature range (-40°C to 85°C), providing enhanced performance margin for industrial applications
• Package Consideration: The transition from through-hole to surface-mount packaging requires PCB redesign; however, the electrical performance and protocol support remain fully compatible

Frequently Asked Questions (FAQ)

Q: Can the ADM4168EBRUZ directly replace the DS8923AN/NOPB without PCB modifications?

A: The ADM4168EBRUZ provides electrical and functional equivalence but uses a different package format (16-TSSOP surface mount versus 16-DIP through hole). PCB layout redesign is necessary to accommodate the new package footprint.

Q: What is the significance of the receiver hysteresis difference (70 mV vs. 60 mV)?

A: Both hysteresis values fall within acceptable ranges for RS422/RS485 communication. The 60 mV hysteresis of the ADM4168EBRUZ provides slightly tighter noise margins and is compatible with standard RS422/RS485 bus implementations.

Q: Does the extended operating temperature range of the ADM4168EBRUZ affect compatibility?

A: The wider temperature range (-40°C to 85°C) of the ADM4168EBRUZ is a superset of the original part's range (0°C to 70°C). This provides enhanced performance capability without compatibility concerns for applications within the original temperature specification.

Q: Are both parts RoHS3 compliant?

A: Yes, both the DS8923AN/NOPB and ADM4168EBRUZ are ROHS3 compliant and REACH unaffected, ensuring regulatory compliance for industrial and commercial applications.

Q: What supply voltage tolerance must be maintained during substitution?

A: Both parts operate within the identical 4.5V to 5.5V supply voltage range. System power supply design must maintain this specification for both the original and substitute components.