SN74F244DB Equivalent & Substitute Parts

Part Overview

The SN74F244DB is a non-inverting buffer logic integrated circuit manufactured by Texas Instruments, designed for 2 element, 4-bit per element configurations with 3-state output capability. This component operates within a 4.5V to 5.5V supply voltage range and is housed in a 20-SSOP surface mount package.

The SN74F244DB carries a Last Time Buy product status, indicating that Texas Instruments has discontinued active production. This status necessitates identification of equivalent substitute components to ensure design continuity and procurement availability for ongoing production requirements.

Substiute Parts

SN74F244DB

Texas InstrumentsIn Stock: 2450SN74F244DB Datasheet

Current PartRFQ

SN74F244DBR

Texas InstrumentsIn Stock: 2793SN74F244DBR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74F244DB is determined by strict equivalence across the following critical parameters:

• Logic Type: Buffer, Non-Inverting
• Number of Elements: 2
• Number of Bits per Element: 4
• Output Type: 3-State
• Current - Output High, Low: 15mA, 64mA
• Voltage - Supply: 4.5V ~ 5.5V
• Operating Temperature: 0°C ~ 70°C (TA)
• Package / Case: 20-SSOP (0.209", 5.30mm Width)
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

The SN74F244DBR qualifies as a direct substitute based on identical electrical specifications and package configuration. The primary distinction between these parts is packaging format: the SN74F244DB is supplied in Tube packaging, while the SN74F244DBR is supplied in Cut Tape (CT) & Digi-Reel® format.

Parameter Comparison

Engineering Selection Recommendations

The SN74F244DBR is the direct substitute for the SN74F244DB. Both components are manufactured by Texas Instruments and maintain identical electrical and mechanical specifications. The SN74F244DBR carries Active product status, ensuring continued availability and manufacturing support from the supplier.

Selection between these parts should be based on packaging requirements and procurement logistics. The SN74F244DB in Tube packaging is suitable for lower-volume applications or manual assembly processes, while the SN74F244DBR in Cut Tape & Digi-Reel® format is optimized for automated assembly and higher-volume production environments.

Both parts satisfy ROHS3 compliance and REACH unaffected status, meeting regulatory requirements for industrial and commercial applications.

Frequently Asked Questions (FAQ)

Q: Can the SN74F244DBR directly replace the SN74F244DB in existing designs?

A: Yes. The SN74F244DBR is electrically and mechanically equivalent to the SN74F244DB. Both components feature identical logic type, element configuration, output characteristics, supply voltage range, operating temperature range, and 20-SSOP package dimensions. Direct substitution is supported without design modification.

Q: What is the difference between Tube and Cut Tape & Digi-Reel® packaging?

A: Tube packaging is used for lower-volume orders and manual assembly processes, with components supplied in protective plastic tubes. Cut Tape & Digi-Reel® packaging is designed for automated pick-and-place assembly systems and higher-volume production runs, with components supplied on continuous tape reels. The electrical and mechanical properties of the components are identical.

Q: Why is the SN74F244DB marked as Last Time Buy?

A: Last Time Buy status indicates that Texas Instruments has discontinued active production of this part number. Existing inventory may be available from authorized distributors, but long-term availability is not guaranteed. The SN74F244DBR, with Active product status, is the recommended alternative for new designs and ongoing production requirements.

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

A: No. Both the SN74F244DB and SN74F244DBR maintain identical RoHS3 compliance, REACH unaffected status, and Moisture Sensitivity Level (MSL) ratings. Both components meet the same regulatory and environmental standards.

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

A: Substitution eligibility is determined by equivalence in logic type (Buffer, Non-Inverting), element configuration (2 elements, 4 bits per element), output type (3-State), output current specifications (15mA high, 64mA low), supply voltage range (4.5V ~ 5.5V), operating temperature range (0°C ~ 70°C), package type (20-SSOP), and mounting method (Surface Mount). Any deviation in these parameters disqualifies a component as a direct substitute.