74VHCT244AM Equivalent & Substitute Parts

Part Overview

The 74VHCT244AM is a non-inverting buffer logic IC manufactured by onsemi, featuring 2 elements with 4 bits per element and 3-state output capability. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The 74VHCT244AM operates within a 4.5V to 5.5V supply voltage range and is housed in a 20-SOIC surface mount package.

Substiute Parts

74VHCT244AM

onsemiIn Stock: 228674VHCT244AM Datasheet

Current PartRFQ

SN74AHCT244DW

Texas InstrumentsIn Stock: 2333SN74AHCT244DW Datasheet

DirectRFQ

SN74AHCT244DWR

Texas InstrumentsIn Stock: 2889SN74AHCT244DWR Datasheet

DirectRFQ

74AHCT244D,118

NXP SemiconductorsIn Stock: 279574AHCT244D,118 Datasheet

UpgradeRFQ

SN74AHCT244MDWREP

Texas InstrumentsIn Stock: 791SN74AHCT244MDWREP Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74VHCT244AM 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: 8mA, 8mA
• Voltage - Supply: 4.5V ~ 5.5V
• Package / Case: 20-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount

Substitute parts are grouped into two categories: Direct Substitutes (pin-compatible replacements from active or discontinued product lines) and Upgrade Substitutes (functionally equivalent parts with enhanced specifications or extended temperature ranges).

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Functionally Equivalent):

SN74AHCT244DW and SN74AHCT244DWR from Texas Instruments are direct functional equivalents to the 74VHCT244AM. Both maintain identical electrical specifications and 20-SOIC packaging. SN74AHCT244DWR is preferred for new designs as it carries Active product status, while SN74AHCT244DW is listed as Discontinued at DiGi Electronics. Both devices extend the operating temperature range to -40°C ~ 125°C compared to the original -40°C ~ 85°C specification.

Upgrade Substitute:

74AHCT244D,118 from NXP Semiconductors is functionally equivalent with identical electrical performance and 20-SOIC packaging. This part is Active and ROHS3 compliant, suitable for applications requiring extended component availability.

Extended Temperature Range Upgrade:

SN74AHCT244MDWREP from Texas Instruments offers an extended operating temperature range of -55°C ~ 125°C, making it suitable for applications requiring enhanced low-temperature performance. This part is Active and ROHS3 compliant.

All substitute parts maintain compliance with ROHS3 and REACH requirements. Selection should prioritize Active product status parts for new production designs.

Frequently Asked Questions (FAQ)

Q: Can SN74AHCT244DWR directly replace 74VHCT244AM in existing designs?

A: Yes. SN74AHCT244DWR is a direct functional equivalent with identical logic type, element count, bit configuration, output type, current ratings, and supply voltage specifications. The 20-SOIC package and surface mount configuration are identical. The extended operating temperature range (-40°C ~ 125°C versus -40°C ~ 85°C) provides additional margin for thermal performance.

Q: What is the difference between SN74AHCT244DW and SN74AHCT244DWR?

A: Both parts are functionally identical with the same electrical specifications and 20-SOIC packaging. The primary difference is packaging format: SN74AHCT244DW is supplied in Tube packaging, while SN74AHCT244DWR is supplied in Cut Tape and Digi-Reel format. SN74AHCT244DWR carries Active product status, while SN74AHCT244DW is Discontinued at DiGi Electronics.

Q: Is 74AHCT244D,118 from NXP compatible with the original 74VHCT244AM?

A: Yes. 74AHCT244D,118 maintains all critical electrical parameters and 20-SOIC packaging. It is functionally equivalent and carries Active product status. The primary difference is the supplier device package designation (20-SO versus 20-SOIC), though both refer to the same physical 20-pin SOIC form factor.

Q: Should I use SN74AHCT244MDWREP for new designs?

A: SN74AHCT244MDWREP is suitable for new designs, particularly those requiring extended low-temperature operation (-55°C minimum versus -40°C). It maintains all functional equivalence to the 74VHCT244AM and carries Active product status with ROHS3 compliance. The extended temperature range provides additional design margin without compromising electrical performance.

Q: Are all substitute parts ROHS3 compliant?

A: SN74AHCT244DW, SN74AHCT244DWR, and SN74AHCT244MDWREP are ROHS3 compliant. 74AHCT244D,118 compliance status is not specified in the provided data. All parts maintain MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the inventory status of these substitute parts?

A: SN74AHCT244DWR has 2788 Pcs in stock (Active status). 74AHCT244D,118 has 2739 Pcs in stock (Active status). SN74AHCT244MDWREP has 687 Pcs in stock (Active status). SN74AHCT244DW has 2300 Pcs in stock (Discontinued at DiGi Electronics status).