CD74HC243M Equivalent & Substitute Parts

Part Overview

The CD74HC243M is a non-inverting transceiver logic integrated circuit manufactured by Texas Instruments, designed for 4-bit data transmission with 3-state output capability. This device operates across a 2V to 6V supply voltage range and is housed in a 14-SOIC surface mount package. The CD74HC243M is currently discontinued at DiGi Electronics, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

CD74HC243M

Texas InstrumentsIn Stock: 1317CD74HC243M Datasheet

Current PartRFQ

CD74HC243M96

Texas InstrumentsIn Stock: 17928CD74HC243M96 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD74HC243M is determined by strict equivalence across the following critical parameters:

• Logic type and function: Non-inverting transceiver configuration
• Bit architecture: 1 element with 4 bits per element
• Output configuration: 3-state output capability
• Electrical specifications: Output current (7.8mA high and low), supply voltage range (2V ~ 6V), operating temperature range (-55°C ~ 125°C)
• Physical form factor: 14-SOIC package with identical pin pitch and dimensions
• Compliance standards: ROHS3 compliance, MSL Level 1, REACH unaffected status

The CD74HC243M96 meets all these criteria as a direct functional equivalent, differing only in packaging format (Cut Tape & Digi-Reel versus Tube) and product status (Active versus Discontinued).

Parameter Comparison

Engineering Selection Recommendations

The CD74HC243M96 is the direct functional equivalent for applications currently using the CD74HC243M. Both parts share identical electrical characteristics, thermal specifications, and physical form factors. The primary distinction is product status: the CD74HC243M is discontinued, while the CD74HC243M96 maintains active status with higher inventory availability (17,900 pieces versus 1,281 pieces).

Both parts maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with standard manufacturing and storage protocols. The CD74HC243M96 is suitable for new designs and production continuity without circuit modification or re-qualification.

Frequently Asked Questions (FAQ)

Q: Can the CD74HC243M96 be used as a direct replacement for the CD74HC243M?

A: Yes. Both parts are manufactured by Texas Instruments with identical electrical specifications, output characteristics, supply voltage range, operating temperature range, and 14-SOIC package dimensions. No circuit modifications are required.

Q: What is the difference between Tube and Cut Tape packaging?

A: Tube packaging (CD74HC243M) is used for lower-volume orders and manual handling. Cut Tape & Digi-Reel packaging (CD74HC243M96) is optimized for automated assembly processes and higher-volume production. The integrated circuit itself is identical.

Q: Are there any compliance or certification differences?

A: No. Both parts carry identical ROHS3 compliance, MSL Level 1 rating, REACH unaffected status, and ECCN/HTSUS classifications.

Q: Why is the CD74HC243M discontinued?

A: Product discontinuation at DiGi Electronics reflects inventory and market decisions by the distributor. The CD74HC243M96 remains in active production by Texas Instruments and serves the same functional requirements.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution is determined by matching logic type (non-inverting transceiver), element count (1), bit architecture (4 bits per element), output configuration (3-state), electrical specifications (7.8mA output current, 2V–6V supply, -55°C to 125°C operation), and package form factor (14-SOIC).