74VHCT245ASJ Equivalent & Substitute Parts

Part Overview

The 74VHCT245ASJ is a non-inverting transceiver IC manufactured by onsemi, designed for 8-bit bidirectional data transfer with 3-state output capability. This component operates within a 4.5V to 5.5V supply voltage range and is housed in a 20-SOIC surface mount package.

The 74VHCT245ASJ carries an Obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this component.

Substiute Parts

74VHCT245ASJ

onsemiIn Stock: 409274VHCT245ASJ Datasheet

Current PartRFQ

SN74AHCT245NSR

Texas InstrumentsIn Stock: 3841SN74AHCT245NSR Datasheet

DirectRFQ

SN74LV245ATNSR

Texas InstrumentsIn Stock: 2817SN74LV245ATNSR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74VHCT245ASJ are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Core Functional Parameters:

• Logic Type: Transceiver, Non-Inverting
• Number of Elements: 1
• Number of Bits per Element: 8
• Output Type: 3-State
• Voltage - Supply: 4.5V ~ 5.5V
• Package / Case: 20-SOIC (0.209", 5.30mm Width)
• Mounting Type: Surface Mount

Allowable Variations:

• Operating Temperature range may extend beyond the original specification
• Output current capability may exceed the original specification
• Product Status may differ (Active vs. Obsolete)
• RoHS compliance status may differ

The identified substitute parts maintain identical functional architecture, electrical interface compatibility, and physical form factor, enabling direct replacement in existing designs.

Parameter Comparison

Engineering Selection Recommendations

SN74AHCT245NSR (Texas Instruments) is the primary substitute for the 74VHCT245ASJ. This part maintains identical output current specifications (8mA, 8mA) and supply voltage range. The extended operating temperature range (-40°C to 125°C versus -40°C to 85°C) provides additional thermal margin. Active product status ensures ongoing availability and supply chain support. ROHS3 compliance satisfies modern regulatory requirements.

SN74LV245ATNSR (Texas Instruments) is an alternative substitute with enhanced output current capability (16mA, 16mA). This increased drive strength may benefit applications requiring higher fanout or lower impedance loads. Like the SN74AHCT245NSR, this part is Active and ROHS3 compliant. The extended operating temperature range provides thermal headroom for demanding environments.

Both substitutes are electrically and mechanically compatible with the 74VHCT245ASJ. Selection between them depends on specific application requirements regarding output current capacity and thermal operating conditions.

Frequently Asked Questions (FAQ)

Q: Can the SN74AHCT245NSR directly replace the 74VHCT245ASJ?

A: Yes. Both parts share identical logic architecture, 8-bit transceiver configuration, 3-state output topology, supply voltage range (4.5V ~ 5.5V), and 20-SOIC package form factor. The SN74AHCT245NSR maintains the same 8mA output current specification and is pin-compatible.

Q: What is the difference between the SN74AHCT245NSR and SN74LV245ATNSR?

A: The primary difference is output current capability. The SN74AHCT245NSR provides 8mA output current (matching the original 74VHCT245ASJ), while the SN74LV245ATNSR provides 16mA. Both operate within the same 4.5V to 5.5V supply voltage range and use identical 20-SOIC packaging. The SN74LV245ATNSR is suitable for applications requiring higher drive strength.

Q: Are there any package compatibility concerns?

A: No. All three parts use the 20-SOIC (0.209", 5.30mm Width) surface mount package. Pin assignments and mechanical dimensions are identical, enabling direct PCB-level substitution without layout modifications.

Q: Why is the 74VHCT245ASJ marked as Obsolete?

A: Obsolete status indicates the manufacturer (onsemi) has discontinued production. The identified substitute parts from Texas Instruments provide equivalent functionality with Active product status, ensuring long-term supply availability and support.

Q: Do the substitute parts meet RoHS compliance?

A: Yes. Both the SN74AHCT245NSR and SN74LV245ATNSR are ROHS3 compliant, meeting current environmental and regulatory standards for electronic components.

Q: What is the Moisture Sensitivity Level (MSL) for these parts?

A: All three parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.