SN74HC240NG4 Equivalent & Substitute Parts

Part Overview

The SN74HC240NG4 is a Buffer, Inverting logic IC manufactured by Texas Instruments, featuring 2 elements with 4 bits per element and 3-state output capability. This 20-PDIP through-hole component operates across a 2V to 6V supply voltage range and is designed for digital logic applications requiring signal inversion and buffering.

The SN74HC240NG4 is currently discontinued at DiGi Electronics. Equivalent substitute parts are available from the same manufacturer with identical electrical and mechanical specifications, ensuring direct functional replacement without design modification.

Substiute Parts

SN74HC240NG4

Texas InstrumentsIn Stock: 1217SN74HC240NG4 Datasheet

Current PartRFQ

SN74HC240AN

Texas InstrumentsIn Stock: 1336SN74HC240AN Datasheet

Parametric EquivalentRFQ

SN74HC240N

Texas InstrumentsIn Stock: 2677SN74HC240N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74HC240NG4 are qualified based on strict equivalence across the following critical parameters:

• Logic Type: Buffer, Inverting (identical function)
• Number of Elements: 2 (identical configuration)
• Number of Bits per Element: 4 (identical bit width)
• Output Type: 3-State (identical output capability)
• Current - Output High, Low: 7.8mA, 7.8mA (identical drive capability)
• Voltage - Supply: 2V ~ 6V (identical supply range)
• Operating Temperature: -40°C ~ 85°C (identical thermal range)
• Package / Case: 20-DIP (0.300", 7.62mm) (identical physical form factor)
• Mounting Type: Through Hole (identical mounting method)

All substitute parts maintain full electrical and mechanical compatibility with the original SN74HC240NG4 specification.

Parameter Comparison

Engineering Selection Recommendations

Both SN74HC240AN and SN74HC240N are direct functional equivalents to the SN74HC240NG4, with all electrical and mechanical parameters matching exactly. The primary distinction is product status: the original SN74HC240NG4 is discontinued, while both substitute parts maintain active status with current inventory availability.

For new designs or component replacement, either SN74HC240AN or SN74HC240N can be selected without modification to circuit design or PCB layout. Both parts carry ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can SN74HC240AN or SN74HC240N be used as direct replacements for SN74HC240NG4?

A: Yes. Both parts are parametric equivalents with identical logic type, element count, bit width, output type, current ratings, supply voltage range, operating temperature range, package form factor, and mounting method. No circuit or layout modifications are required.

Q: What is the difference between SN74HC240AN and SN74HC240N?

A: Both parts are electrically and mechanically identical. The difference lies in product status: SN74HC240N is the manufacturer-recommended substitute with higher current inventory availability (2572 Pcs), while SN74HC240AN is also active with available stock (1268 Pcs).

Q: Are the 20-DIP packages of all three parts physically identical?

A: Yes. All three parts use the 20-DIP (0.300", 7.62mm) package with through-hole mounting. They are pin-compatible and footprint-compatible for direct PCB substitution.

Q: Do all three parts meet current compliance standards?

A: Yes. All three parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and use.

Q: What supply voltage range do these parts support?

A: All three parts operate across a 2V to 6V supply voltage range with identical output current capability of 7.8mA for both high and low states.