DS8923AM/NOPB Equivalent & Substitute Parts

Part Overview

The DS8923AM/NOPB is a 2/2 transceiver IC with full-duplex RS422 and RS485 protocol support, manufactured by Texas Instruments in a 16-SOIC surface mount package. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing system maintenance and new design implementations. The obsolete status necessitates evaluation of active alternative components that maintain electrical and mechanical compatibility with existing applications.

Substiute Parts

DS8923AM/NOPB

Texas InstrumentsIn Stock: 1458DS8923AM/NOPB Datasheet

Current PartRFQ

ADM4168EBRUZ

Analog Devices Inc.In Stock: 18240ADM4168EBRUZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DS8923AM/NOPB is determined by the following critical parameters:

• Protocol Compatibility: Both main and substitute parts must support RS422 and RS485 protocols
• Transceiver Configuration: 2/2 driver/receiver count with full-duplex operation
• Electrical Specifications: Supply voltage range of 4.5V ~ 5.5V and receiver hysteresis characteristics
• Package Type: Surface mount configuration with pin-compatible or functionally equivalent packaging
• Compliance Standards: RoHS3 compliance and REACH unaffected status

The ADM4168EBRUZ from Analog Devices Inc. meets these substitution criteria while offering active product status and extended operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

The ADM4168EBRUZ is a functionally equivalent substitute for the DS8923AM/NOPB based on the following factors:

• Protocol and Configuration Match: Both devices implement identical RS422/RS485 2/2 transceiver architecture with full-duplex operation
• Electrical Compatibility: Supply voltage specifications are identical (4.5V ~ 5.5V), ensuring direct integration into existing power distribution systems
• Active Product Status: The ADM4168EBRUZ maintains active manufacturing status, providing long-term availability and supply chain stability compared to the obsolete DS8923AM/NOPB
• Compliance Alignment: Both components meet ROHS3 compliance and REACH unaffected requirements, maintaining regulatory consistency
• Extended Operating Range: The ADM4168EBRUZ supports -40°C ~ 85°C operation, exceeding the DS8923AM/NOPB range of 0°C ~ 70°C

Package differences (16-SOIC versus 16-TSSOP) require PCB layout evaluation for mechanical fit and thermal management considerations.

Frequently Asked Questions (FAQ)

Q: Can the ADM4168EBRUZ directly replace the DS8923AM/NOPB without circuit modifications?

A: Both devices share identical protocol support (RS422/RS485), transceiver configuration (2/2), and supply voltage specifications (4.5V ~ 5.5V). However, package differences (16-SOIC versus 16-TSSOP) require PCB footprint verification. Pin assignment compatibility must be confirmed against the specific application schematic.

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

A: The ADM4168EBRUZ operates with 60 mV receiver hysteresis compared to the DS8923AM/NOPB at 70 mV. Both values fall within standard RS422/RS485 specifications. The lower hysteresis of the substitute may provide improved noise margin in certain signal environments but requires validation in the target application.

Q: Why is the operating temperature range different between these parts?

A: The ADM4168EBRUZ supports -40°C ~ 85°C operation, while the DS8923AM/NOPB is rated 0°C ~ 70°C. The extended range of the substitute provides greater flexibility for applications requiring wider temperature operation. Applications operating within the original 0°C ~ 70°C window remain fully compatible.

Q: Are there compliance or regulatory differences between these components?

A: Both the DS8923AM/NOPB and ADM4168EBRUZ maintain ROHS3 compliance and REACH unaffected status. No regulatory or compliance barriers exist for substitution in applications requiring these certifications.

Q: What packaging considerations apply to this substitution?

A: The DS8923AM/NOPB uses 16-SOIC (0.154", 3.90mm width) packaging, while the ADM4168EBRUZ uses 16-TSSOP (0.173", 4.40mm width). Both are surface mount configurations. PCB layout modifications may be necessary to accommodate the different package footprint and pin spacing.