CD74FCT244SM96 Equivalent & Substitute Parts

Part Overview

The CD74FCT244SM96 is a non-inverting buffer logic IC manufactured by Texas Instruments, featuring 2 elements with 4 bits per element and 3-state output capability. This component is classified as obsolete, which necessitates identification of active equivalent parts for ongoing design requirements and production continuity. The 20-SSOP surface mount package provides compact integration for digital logic applications requiring buffering and signal isolation.

Substiute Parts

CD74FCT244SM96

Texas InstrumentsIn Stock: 1596CD74FCT244SM96 Datasheet

Current PartRFQ

SN74HCT244DBR

Texas InstrumentsIn Stock: 1132SN74HCT244DBR Datasheet

MFR RecommendedRFQ

74FCT244ATQG

IDT, Integrated Device Technology IncIn Stock: 240074FCT244ATQG Datasheet

MFR RecommendedRFQ

74FCT244CTQG

IDT, Integrated Device Technology IncIn Stock: 865474FCT244CTQG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CD74FCT244SM96 are identified based on functional equivalence within the allowed parameter ranges for this product category. The substitution logic is structured as follows:

Primary Substitution Criteria:

• Logic Type: Buffer, Non-Inverting (identical)
• Number of Elements: 2 (identical)
• Number of Bits per Element: 4 (identical)
• Output Type: 3-State (identical)
• Package / Case: 20-SSOP form factor (identical)
• Mounting Type: Surface Mount (identical)

Electrical Parameter Compatibility:

• Supply voltage range must encompass or overlap with 4.75V ~ 5.25V
• Output current specifications must meet or exceed application requirements
• Operating temperature range must support the intended application environment

Substitute Parts Identified:

1. SN74HCT244DBR (Texas Instruments) – Active status, extended temperature range, compatible supply voltage range (4.5V ~ 5.5V), reduced output current (6mA, 6mA)

2. 74FCT244ATQG (IDT, Integrated Device Technology Inc) – Active status, extended temperature range, identical supply voltage range (4.75V ~ 5.25V), identical output current (15mA, 64mA), package variant (20-QSOP)

3. 74FCT244CTQG (IDT, Integrated Device Technology Inc) – Active status, extended temperature range, identical supply voltage range (4.75V ~ 5.25V), identical output current (15mA, 64mA), package variant (20-QSOP)

Parameter Comparison

Engineering Selection Recommendations

SN74HCT244DBR Selection Criteria: This substitute maintains identical package dimensions (20-SSOP, 0.209" width) and form factor, enabling direct PCB layout compatibility. The extended operating temperature range (-40°C ~ 85°C) provides broader environmental coverage compared to the original part. Supply voltage range (4.5V ~ 5.5V) encompasses the original specification. Output current specifications (6mA, 6mA) are reduced; applications requiring the original 15mA/64mA output current must verify load compatibility. Active product status ensures long-term availability and supply chain continuity. ROHS3 compliance maintained.

74FCT244ATQG and 74FCT244CTQG Selection Criteria: Both IDT variants provide electrical parameter equivalence with identical supply voltage (4.75V ~ 5.25V) and output current (15mA, 64mA) specifications. Extended operating temperature range (-40°C ~ 85°C) supports wider application environments. Package variant (20-QSOP, 0.154" width) differs from the original, requiring PCB layout modification. Active product status ensures availability. Selection between ATQG and CTQG variants depends on temperature grade requirements and inventory availability (CTQG: 8549 Pcs; ATQG: 2347 Pcs).

Recommendation Priority: For direct PCB compatibility without layout changes, SN74HCT244DBR is preferred when output current reduction is acceptable. For electrical parameter equivalence with layout modification capability, 74FCT244CTQG or 74FCT244ATQG are suitable alternatives.

Frequently Asked Questions (FAQ)

Q: Can SN74HCT244DBR replace CD74FCT244SM96 in all applications? A: SN74HCT244DBR provides functional equivalence with identical logic configuration and package form factor. The reduced output current (6mA, 6mA versus 15mA, 64mA) requires verification that connected loads do not exceed these specifications. Supply voltage range compatibility (4.5V ~ 5.5V encompasses 4.75V ~ 5.25V) is confirmed.

Q: What is the primary difference between the IDT variants 74FCT244ATQG and 74FCT244CTQG? A: Both parts provide identical electrical specifications and operating temperature range. The distinction is temperature grade designation (A versus C grade). Selection depends on application temperature requirements and inventory availability.

Q: Are package modifications required when using 74FCT244ATQG or 74FCT244CTQG? A: Yes. These parts use 20-QSOP package (0.154" width) versus the original 20-SSOP (0.209" width). PCB footprint and layout modifications are necessary. Pin configuration remains functionally equivalent.

Q: Do all substitute parts maintain RoHS3 compliance? A: SN74HCT244DBR explicitly maintains ROHS3 compliance. RoHS status for IDT variants (74FCT244ATQG and 74FCT244CTQG) is not specified in provided documentation.

Q: What is the inventory status of substitute parts? A: SN74HCT244DBR: 1111 Pcs; 74FCT244ATQG: 2347 Pcs; 74FCT244CTQG: 8549 Pcs. All are listed as new original stock.

Q: Can these substitutes be used interchangeably on the same PCB? A: SN74HCT244DBR maintains identical package form factor and enables direct substitution. IDT variants require PCB layout modification due to package dimension differences and are not interchangeable without redesign.