SN74AHCT245DBRG4 Equivalent & Substitute Parts

Part Overview

The SN74AHCT245DBRG4 is a non-inverting transceiver logic IC manufactured by Texas Instruments, designed for 8-bit data bus applications with 3-state output capability. This component operates across a 4.5V to 5.5V supply range and is rated for -40°C to 125°C operating temperature. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications.

Substiute Parts

SN74AHCT245DBRG4

Texas InstrumentsIn Stock: 780SN74AHCT245DBRG4 Datasheet

Current PartRFQ

SN74AHCT245DBR

Texas InstrumentsIn Stock: 3673SN74AHCT245DBR Datasheet

Parametric EquivalentRFQ

74AHCT245PW,118

Nexperia USA Inc.In Stock: 201274AHCT245PW,118 Datasheet

MFR RecommendedRFQ

74VHCT245AMTCX

onsemiIn Stock: 1018974VHCT245AMTCX Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SN74AHCT245DBRG4 is determined by strict equivalence across the following parameters: logic type (non-inverting transceiver), element count (1), bit width (8 bits), output configuration (3-state), output current capability (8mA), supply voltage range (4.5V ~ 5.5V), and mounting type (surface mount). Package variations between 20-SSOP and 20-TSSOP are acceptable substitutes provided PCB layout accommodates the dimensional differences. Operating temperature range and product status are secondary considerations for component selection.

Parameter Comparison

Engineering Selection Recommendations

SN74AHCT245DBR is the primary parametric equivalent, offering identical electrical specifications and package form factor with active product status from Texas Instruments. This part maintains full compatibility with designs specified for SN74AHCT245DBRG4.

74AHCT245PW,118 from Nexperia USA Inc. provides electrical equivalence with a package transition from 20-SSOP to 20-TSSOP. PCB layout modification is required to accommodate the reduced package width (4.40mm versus 5.30mm). This part is actively manufactured and ROHS3 compliant.

74VHCT245AMTCX from onsemi meets all electrical parameters with the exception of operating temperature range, which is limited to -40°C to 85°C. This part is suitable for applications not requiring the extended 125°C upper temperature limit. Package form is 20-TSSOP, requiring PCB layout adjustment. High inventory availability supports production continuity.

Frequently Asked Questions (FAQ)

Q: Can SN74AHCT245DBR directly replace SN74AHCT245DBRG4 without PCB modification?

A: Yes. SN74AHCT245DBR is a parametric equivalent with identical package form (20-SSOP) and electrical specifications. No PCB layout changes are required.

Q: What is the difference between 20-SSOP and 20-TSSOP packages?

A: Both are 20-pin surface mount packages. The 20-SSOP has a 5.30mm body width, while 20-TSSOP has a 4.40mm body width. Pin pitch and electrical function remain identical. PCB footprint adjustment is necessary when transitioning between these packages.

Q: Is 74VHCT245AMTCX suitable for applications requiring -40°C to 125°C operation?

A: No. The 74VHCT245AMTCX operating temperature range is -40°C to 85°C. Applications requiring operation above 85°C must use SN74AHCT245DBR or 74AHCT245PW,118.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. SN74AHCT245DBR, 74AHCT245PW,118, and 74VHCT245AMTCX are all ROHS3 compliant with MSL rating of 1 (Unlimited).

Q: Which substitute offers the best inventory availability?

A: 74VHCT245AMTCX has the highest inventory level at 10,086 pieces. SN74AHCT245DBR has 3,611 pieces available, and 74AHCT245PW,118 has 2,000 pieces.

Q: Can I use 74AHCT245PW,118 in a design originally specified for 20-SSOP?

A: Electrical function is preserved, but the package footprint differs. PCB redesign is required to accommodate the 20-TSSOP package dimensions before implementation.