CD74HC191M96E4 Equivalent & Substitute Parts

Part Overview

The CD74HC191M96E4 is a 4-bit binary counter IC manufactured by Texas Instruments, housed in a 16-SOIC surface mount package. This logic component functions as a synchronous up/down counter with asynchronous reset capability, operating across a supply voltage range of 2V to 6V and supporting count rates up to 35 MHz. The part is currently discontinued at DiGi Electronics, necessitating identification of equivalent alternatives for ongoing design requirements and production needs.

Substiute Parts

CD74HC191M96E4

Texas InstrumentsIn Stock: 1108CD74HC191M96E4 Datasheet

Current PartRFQ

CD74HC191M96

Texas InstrumentsIn Stock: 5261CD74HC191M96 Datasheet

Parametric EquivalentRFQ

CD74HC191MT

Texas InstrumentsIn Stock: 1935CD74HC191MT Datasheet

Parametric EquivalentRFQ

74HC191D,653

Nexperia USA Inc.In Stock: 291274HC191D,653 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD74HC191M96E4 is determined by strict equivalence across the following critical parameters:

Functional Parameters: Logic type (Binary Counter), number of bits per element (4), direction capability (Up/Down), reset type (Asynchronous), timing architecture (Synchronous), and trigger type (Positive Edge) must remain identical.

Electrical Parameters: Supply voltage range (2V ~ 6V) and operating temperature range must be met or exceeded by the substitute part.

Physical Parameters: Package type (16-SOIC) and mounting type (Surface Mount) must match to ensure PCB compatibility without redesign.

Compliance Parameters: RoHS3 compliance and MSL rating must be maintained for manufacturing and environmental requirements.

Substitute parts are grouped into two categories based on their relationship to the main part:

Parametric Equivalents share identical specifications across all functional, electrical, and physical parameters. These parts are direct replacements with no functional or performance differences.

Manufacturer Recommended Equivalents meet all critical functional and electrical parameters but may originate from different manufacturers, offering alternative sourcing while maintaining full compatibility.

Parameter Comparison

Engineering Selection Recommendations

CD74HC191M96 is the primary substitute for the CD74HC191M96E4. Both parts are manufactured by Texas Instruments and share identical functional and electrical specifications. The CD74HC191M96 maintains active product status with 5157 units in stock, ensuring supply continuity. The only difference is packaging format: the substitute is supplied in Tape & Reel configuration rather than tube, which is standard for high-volume production environments.

CD74HC191MT is a secondary Texas Instruments substitute currently in Last Time Buy status. This part carries identical electrical and functional parameters to the main part. Selection of this substitute should account for its limited availability window, as Last Time Buy status indicates production discontinuation is planned.

74HC191D,653 (Nexperia USA Inc.) is a manufacturer-recommended equivalent suitable for applications where multi-source qualification is required. This part meets all critical functional parameters and maintains the same 16-SOIC package footprint. The operating temperature range is narrower (-40°C to 125°C versus -55°C to 125°C), which may be a limiting factor for applications requiring extended low-temperature operation. The count rate specification is higher at 39 MHz, providing additional performance margin. This part is currently in active production status with 2846 units available.

For new designs or production restarts, CD74HC191M96 is recommended due to active status and full parameter alignment. For applications with extended temperature requirements below -40°C, CD74HC191M96E4 or CD74HC191MT should be retained if inventory permits.

Frequently Asked Questions (FAQ)

Q: Can CD74HC191M96 be used as a direct replacement for CD74HC191M96E4?

A: Yes. Both parts are functionally and electrically identical. The primary difference is packaging format: CD74HC191M96 is supplied in Tape & Reel configuration, which is standard for automated assembly. No circuit modifications are required.

Q: What is the difference between the Texas Instruments and Nexperia versions?

A: Both manufacturers produce 74HC191 binary counters that meet the same functional specifications. The Nexperia 74HC191D,653 has a narrower operating temperature range (-40°C to 125°C) and a higher count rate specification (39 MHz). For applications operating below -40°C, the Texas Instruments versions are required.

Q: Why is CD74HC191MT listed as Last Time Buy?

A: Last Time Buy status indicates the manufacturer is discontinuing production. This part remains available but in limited quantities. For ongoing production requirements, CD74HC191M96 is the preferred alternative.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) rating, meeting current environmental and manufacturing standards.

Q: Can the 74HC191D,653 be used in applications requiring -55°C operation?

A: No. The Nexperia part is specified only to -40°C minimum. Applications requiring -55°C operation must use the Texas Instruments CD74HC191M96 or CD74HC191MT.

Q: What is the significance of the 16-SOIC package specification?

A: The 16-SOIC (Small Outline Integrated Circuit) package is a surface mount standard with 0.154" width and 3.90mm body width. All substitute parts use this identical package, ensuring PCB footprint compatibility without layout modifications.