CD74FCT843AM96 Equivalent & Substitute Parts

Part Overview

The CD74FCT843AM96 is a D-Type Transparent Latch logic IC manufactured by Texas Instruments, designed for 9-bit bus interface applications with tri-state output capability. This component operates within the 4.75V to 5.25V supply voltage range and is housed in a 24-SOIC surface mount package.

The CD74FCT843AM96 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this component.

Substiute Parts

CD74FCT843AM96

Texas InstrumentsIn Stock: 778CD74FCT843AM96 Datasheet

Current PartRFQ

CD74FCT843AM

National SemiconductorIn Stock: 4163CD74FCT843AM Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD74FCT843AM96 is determined by strict equivalence across the following critical parameters:

• Logic Type: D-Type Transparent Latch
• Circuit Configuration: 9:9
• Output Type: Tri-State
• Voltage - Supply: 4.75V ~ 5.25V
• Independent Circuits: 1
• Delay Time - Propagation: 9ns
• Current - Output High, Low: 15mA, 48mA
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 24-SOIC (0.295", 7.50mm Width)

The CD74FCT843AM qualifies as a direct substitute based on identical electrical specifications, circuit configuration, and package format. The primary distinction is manufacturer designation and product status classification.

Parameter Comparison

Engineering Selection Recommendations

The CD74FCT843AM is the primary substitute for the obsolete CD74FCT843AM96. Both components maintain identical electrical and mechanical specifications across all critical parameters, ensuring functional equivalence in circuit applications.

The CD74FCT843AM carries Active product status, providing superior supply chain availability compared to the obsolete main part. Both components are ROHS3 compliant, supporting environmental and regulatory requirements for modern manufacturing and deployment.

Selection between these parts should prioritize the CD74FCT843AM due to its active status and documented availability. The CD74FCT843AM96 remains viable only where existing inventory is available and supply chain continuity is not a constraint.

Frequently Asked Questions (FAQ)

Q: Can the CD74FCT843AM directly replace the CD74FCT843AM96 in existing designs?

A: Yes. Both components share identical electrical specifications, circuit configuration (9:9 D-Type Transparent Latch), tri-state output characteristics, supply voltage range (4.75V ~ 5.25V), propagation delay (9ns), and output current ratings (15mA high, 48mA low). The 24-SOIC package format is identical, enabling direct pin-compatible substitution.

Q: What is the significance of the product status difference?

A: The CD74FCT843AM96 is classified as obsolete, indicating discontinued manufacturing and limited availability. The CD74FCT843AM maintains active status, ensuring ongoing production, documented supply chain access, and manufacturer support. For new designs or production continuity, the active substitute is preferred.

Q: Are there compliance or certification differences between these parts?

A: The CD74FCT843AM96 is explicitly ROHS3 compliant with MSL rating of 1 (Unlimited). The CD74FCT843AM specifications do not document these certifications in the provided data. Compliance verification with the National Semiconductor manufacturer should be conducted if regulatory or environmental certifications are design requirements.

Q: Does the package designation "24-SOIC" ensure mechanical compatibility?

A: Yes. Both components use the 24-SOIC package with identical dimensions (0.295" width, 7.50mm). PCB footprints, solder reflow profiles, and mechanical assembly processes are directly compatible.

Q: What parameters must remain constant for substitution validity?

A: Logic type, circuit configuration, output type, supply voltage range, propagation delay, output current ratings, operating temperature range, and package format must all match exactly. Any deviation in these parameters invalidates substitution eligibility.