SN74LS136NG4 Equivalent & Substitute Parts

Part Overview

The SN74LS136NG4 is a 4-channel XOR (Exclusive OR) logic IC with open collector outputs in a 14-PDIP package, manufactured by Texas Instruments. This component is discontinued at DiGi Electronics, making substitute parts necessary for ongoing design requirements and production needs. The part operates within the 74LS logic family standard and is suitable for digital logic applications requiring exclusive OR gate functionality.

Substiute Parts

SN74LS136NG4

Texas InstrumentsIn Stock: 1114SN74LS136NG4 Datasheet

Current PartRFQ

SN74LS136N

Texas InstrumentsIn Stock: 3056SN74LS136N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74LS136NG4 is determined by strict equivalence across the following critical parameters:

• Logic Type: XOR (Exclusive OR) with 4 channels and 2 inputs per channel
• Output Configuration: Open Collector topology
• Electrical Specifications: Supply voltage 4.75V ~ 5.25V, output current 8mA low, input logic levels 0.8V low / 2V high
• Timing Performance: Maximum propagation delay 30ns at 5V with 15pF load
• Operating Temperature Range: 0°C ~ 70°C
• Package: 14-DIP through-hole mounting
• Series Compliance: 74LS logic family

The SN74LS136N qualifies as a direct substitute based on identical electrical and functional parameters within these specifications.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS136N is the appropriate substitute for the discontinued SN74LS136NG4. Both parts maintain identical electrical characteristics, functional specifications, and package geometry. The SN74LS136N carries active product status with current inventory availability, ensuring supply chain continuity. Both parts comply with ROHS3 and REACH standards, maintaining regulatory compliance for applications requiring these certifications. The transition from the NG4 packaging variant to the N variant (tube packaging) does not affect electrical or mechanical compatibility in through-hole PCB applications.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS136N directly replace the SN74LS136NG4 in existing designs?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters. The pin configuration, voltage ratings, timing characteristics, and output current specifications are equivalent. The difference in packaging designation (NG4 versus N) reflects supplier packaging format only and does not affect circuit performance.

Q: What is the significance of the open collector output configuration?

A: Open collector outputs require external pull-up resistors to establish logic high levels. This topology allows multiple outputs to be wire-ORed together and provides flexibility in output voltage levels. When selecting the SN74LS136N as a substitute, ensure that existing pull-up resistor networks and load impedances remain compatible with the 8mA output current specification.

Q: Are there any compliance or certification differences between these parts?

A: Both the SN74LS136NG4 and SN74LS136N maintain ROHS3 compliance and REACH unaffected status. No compliance differences exist between the parts.

Q: What is the impact of the 14-DIP package on board layout?

A: The 14-DIP package maintains a 0.300-inch (7.62mm) row spacing standard for through-hole mounting. PCB footprints designed for the SN74LS136NG4 are directly compatible with the SN74LS136N without modification.

Q: How do the propagation delay specifications affect circuit timing?

A: Both parts specify a maximum propagation delay of 30ns at 5V supply with a 15pF load. This timing parameter must be verified against system clock frequencies and setup/hold time requirements in the application circuit. No timing differences exist between the substitute part and the original.