SN74HC540NG4 Equivalent & Substitute Parts

Part Overview

The SN74HC540NG4 is an inverting buffer logic integrated circuit manufactured by Texas Instruments, designed for 3-state output applications in digital logic systems. This device features 1 element with 8 bits per element, operating across a supply voltage range of 2V to 6V with an operating temperature range of -40°C to 85°C.

The SN74HC540NG4 is currently discontinued at DiGi Electronics. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production, maintenance, and new system implementations.

Substiute Parts

SN74HC540NG4

Texas InstrumentsIn Stock: 804SN74HC540NG4 Datasheet

Current PartRFQ

SN74HC540N

Texas InstrumentsIn Stock: 50256SN74HC540N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74HC540NG4 is determined by strict equivalence across the following critical parameters:

• Logic Type: Buffer, Inverting
• Number of Elements: 1
• Number of Bits per Element: 8
• Output Type: 3-State
• Current - Output High, Low: 7.8mA, 7.8mA
• Voltage - Supply: 2V ~ 6V
• Operating Temperature: -40°C ~ 85°C (TA)
• Mounting Type: Through Hole
• Package / Case: 20-DIP (0.300", 7.62mm)
• Base Product Number: 74HC540

The SN74HC540N is identified as a manufacturer-recommended substitute. Both parts share identical electrical specifications, logic functionality, and physical packaging. The primary distinction is product status and packaging format.

Parameter Comparison

Engineering Selection Recommendations

The SN74HC540N is the direct substitute for the SN74HC540NG4. Both parts are manufactured by Texas Instruments and maintain identical electrical and mechanical specifications. The SN74HC540N is currently in active production status with substantial inventory availability (50,200 pcs), whereas the SN74HC540NG4 is discontinued.

Both parts comply with ROHS3 standards and REACH regulations, ensuring regulatory compliance for new designs and replacements. The SN74HC540N is supplied in tube packaging, whereas the original part was supplied in alternative packaging. Pin configuration, electrical performance, and thermal characteristics remain unchanged between these parts.

Frequently Asked Questions (FAQ)

Q: Can the SN74HC540N directly replace the SN74HC540NG4 in existing designs?

A: Yes. Both parts are electrically and mechanically identical. They share the same 20-DIP package, pin configuration, output current ratings, supply voltage range, and operating temperature specifications. Direct substitution is possible without circuit modification.

Q: What is the difference between SN74HC540NG4 and SN74HC540N?

A: The primary differences are product status and packaging format. The SN74HC540NG4 is discontinued, while the SN74HC540N is in active production. The SN74HC540N is supplied in tube packaging. All electrical and functional specifications are identical.

Q: Are there any compliance or certification differences?

A: Both parts maintain ROHS3 compliance and REACH unaffected status. No compliance differences exist between the two parts.

Q: What is the 20-DIP package specification?

A: The 20-DIP package is a through-hole dual inline package with 0.300 inches (7.62mm) row spacing. This standard package format is compatible with conventional PCB through-hole assembly processes.

Q: What output current can this buffer supply?

A: The SN74HC540 series provides 7.8mA output current for both high and low logic states, suitable for driving standard TTL and CMOS logic loads.

Q: What supply voltage range is supported?

A: Both the SN74HC540NG4 and SN74HC540N operate across a 2V to 6V supply voltage range, providing flexibility for various logic system implementations.