SN74LS122NG4 Equivalent & Substitute Parts

Part Overview

The SN74LS122NG4 is a monostable multivibrator logic IC manufactured by Texas Instruments, featuring a 28 ns propagation delay and 14-PDIP through-hole packaging. This component is discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design support and procurement. The part operates within the 74LS logic family standard, providing single independent circuit functionality suitable for timing and pulse generation applications.

Substiute Parts

SN74LS122NG4

Texas InstrumentsIn Stock: 876SN74LS122NG4 Datasheet

Current PartRFQ

SN74LS122N

Texas InstrumentsIn Stock: 4097SN74LS122N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SN74LS122NG4 is determined by strict equivalence across the following critical parameters:

• Logic Type: Monostable multivibrator function
• Propagation Delay: 28 ns
• Independent Circuits: 1
• Output Current Specifications: 400µA (high), 8mA (low)
• Supply Voltage Range: 4.75 V ~ 5.25 V
• Operating Temperature Range: 0°C ~ 70°C
• Package Configuration: 14-DIP through-hole form factor
• Pin Compatibility: Identical 14-PDIP pinout

The SN74LS122N qualifies as a direct substitute based on matching all electrical and mechanical parameters. The primary distinction is product status: SN74LS122N remains active in production with higher inventory availability, while SN74LS122NG4 is discontinued.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS122N is the direct equivalent for SN74LS122NG4 replacement. Both parts are manufactured by Texas Instruments and maintain identical electrical specifications, timing characteristics, and physical packaging. The SN74LS122N is currently in active production status with significantly higher inventory availability (4062 units versus 860 units), making it the preferred selection for new procurement and design continuity.

Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for industrial and commercial applications. The through-hole 14-DIP package format remains consistent, allowing direct socket substitution without PCB redesign.

Frequently Asked Questions (FAQ)

Q: Can SN74LS122N be used as a direct replacement for SN74LS122NG4?

A: Yes. Both parts are electrically and mechanically identical. They share the same 28 ns propagation delay, output current specifications, supply voltage range, operating temperature range, and 14-DIP through-hole package configuration. Pin-for-pin compatibility is guaranteed.

Q: What is the difference between SN74LS122NG4 and SN74LS122N?

A: The primary difference is product status. SN74LS122NG4 is discontinued at DiGi Electronics, while SN74LS122N remains in active production. Both parts are manufactured by Texas Instruments with identical functional and electrical characteristics.

Q: Are there packaging differences between these parts?

A: Both parts use 14-DIP (0.300", 7.62mm) through-hole packaging. The SN74LS122N is supplied in tube packaging, while SN74LS122NG4 packaging details are not specified. This does not affect electrical performance or board-level compatibility.

Q: Do both parts meet the same compliance standards?

A: Yes. Both SN74LS122NG4 and SN74LS122N are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for industrial and commercial electronics.

Q: Which part should be selected for new designs?

A: SN74LS122N should be selected for new designs due to active production status and higher inventory availability. It provides the same functional performance as SN74LS122NG4 with improved supply chain continuity.