SN74AHC244DGVR Equivalent & Substitute Parts

Part Overview

The SN74AHC244DGVR is a non-inverting buffer logic IC manufactured by Texas Instruments, designed for 2-element, 4-bit per element configurations with 3-state output capability. This active product operates across a 2V to 5.5V supply voltage range and is housed in a 20-TVSOP surface mount package. Substitute parts are necessary when the primary part faces inventory constraints, supply chain disruptions, or when alternative packaging formats better suit specific manufacturing requirements while maintaining electrical and functional equivalence.

Key Parameters

Parameter	Value
Logic Type	Buffer, Non-Inverting
Number of Elements	2
Number of Bits per Element	4
Output Type	3-State
Current - Output High, Low	8mA, 8mA
Voltage - Supply	2V ~ 5.5V
Operating Temperature Range	-40°C ~ 125°C (TA)
Mounting Type	Surface Mount
Package / Case	20-TFSOP (0.173", 4.40mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the SN74AHC244DGVR is determined by strict alignment of the following electrical and mechanical parameters:

Logic Type: Buffer, Non-Inverting
Number of Elements: 2
Number of Bits per Element: 4
Output Type: 3-State
Current - Output High, Low: 8mA, 8mA
Voltage - Supply: 2V ~ 5.5V
Mounting Type: Surface Mount
Package / Case: 20-pin TFSOP/TSSOP format with 0.173" width and 4.40mm width specification

All qualified substitute parts maintain these core electrical specifications. Variations in operating temperature range, manufacturer, packaging format (Tape & Reel vs. Bulk vs. Cut Tape), and series designation (74AHC vs. 74VHC) do not affect functional substitutability when the above parameters remain constant.

Parameter Comparison

Parameter	SN74AHC244DGVR (TI)	74AHC244PW,118 (Nexperia)	74VHC244MTC (Fairchild)	74VHC244MTCX (onsemi)
Logic Type	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting
Number of Elements	2	2	2	2
Number of Bits per Element	4	4	4	4
Output Type	3-State	3-State	3-State	3-State
Current - Output High, Low	8mA, 8mA	8mA, 8mA	8mA, 8mA	8mA, 8mA
Voltage - Supply	2V ~ 5.5V	2V ~ 5.5V	2V ~ 5.5V	2V ~ 5.5V
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	20-TFSOP (0.173", 4.40mm Width)	20-TSSOP (0.173", 4.40mm Width)	20-TSSOP (0.173", 4.40mm Width)	20-TSSOP (0.173", 4.40mm Width)
Operating Temperature Range	-40°C ~ 125°C (TA)	-40°C ~ 125°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Product Status	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	Not specified	Not specified	1 (Unlimited)

Engineering Selection Recommendations

All four parts maintain active product status and are electrically equivalent across the specified core parameters. Selection among these substitutes should be based on the following factors:

74AHC244PW,118 (Nexperia USA Inc.): Maintains identical operating temperature range (-40°C ~ 125°C) to the primary part and carries ROHS3 compliance certification. Package format is 20-TSSOP, which is mechanically compatible with 20-TFSOP footprints in standard PCB designs.

74VHC244MTC (Fairchild Semiconductor): Operates within a reduced temperature range (-40°C ~ 85°C). Compliance certifications are not specified in the provided data. Packaging is supplied in Bulk format rather than Tape & Reel.

74VHC244MTCX (onsemi): Operates within a reduced temperature range (-40°C ~ 85°C). Carries ROHS3 compliance and MSL 1 (Unlimited) certification. Supplied in Cut Tape (CT) & Digi-Reel® format. Highest inventory availability at 21,902 pieces.

For applications requiring the full -40°C ~ 125°C operating temperature range, the SN74AHC244DGVR or 74AHC244PW,118 are preferred. For applications with operating temperature limits of -40°C ~ 85°C, all four parts are functionally equivalent.

Frequently Asked Questions (FAQ)

Q: Can the 74VHC244MTC and 74VHC244MTCX be used in place of the SN74AHC244DGVR in all applications?

A: These parts are electrically equivalent for all specified parameters. However, the 74VHC series parts operate only to 85°C maximum, compared to 125°C for the SN74AHC244DGVR. Applications requiring operation above 85°C must use the SN74AHC244DGVR or 74AHC244PW,118.

Q: Are the 20-TFSOP and 20-TSSOP packages pin-compatible?

A: Both packages maintain 0.173" width and 4.40mm width specifications with 20-pin configurations. Pin pitch and footprint are compatible for standard PCB assembly processes.

Q: What is the difference between Tape & Reel, Bulk, and Cut Tape packaging?

A: These are supply format variations only. Tape & Reel (TR) provides components on continuous tape for automated pick-and-place assembly. Bulk packaging supplies loose components. Cut Tape (CT) & Digi-Reel® provides tape cut to specific lengths. All formats contain identical components; selection depends on manufacturing process requirements.

Q: Does the operating temperature range affect electrical performance within the specified range?

A: No. All parts maintain identical electrical specifications (voltage, current, logic function) within their respective operating temperature ranges. The temperature range indicates the maximum environmental conditions under which the part maintains specification compliance.

Q: Are all substitute parts RoHS3 compliant?

A: The SN74AHC244DGVR, 74AHC244PW,118, and 74VHC244MTCX are confirmed ROHS3 compliant. RoHS status for the 74VHC244MTC is not specified in the provided data.

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