SN74HCT74NG4 Equivalent & Substitute Parts

Part Overview

The SN74HCT74NG4 is a dual D-type flip-flop logic integrated circuit manufactured by Texas Instruments. This device provides two independent 1-bit D-type flip-flops with set and reset functionality, designed for digital logic applications requiring edge-triggered storage elements. The SN74HCT74NG4 is currently discontinued at DiGi Electronics, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

SN74HCT74NG4

Texas InstrumentsIn Stock: 1222SN74HCT74NG4 Datasheet

Current PartRFQ

SN74HCT74N

Texas InstrumentsIn Stock: 5983SN74HCT74N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74HCT74NG4 is determined by strict equivalence across the following critical parameters:

Functional Parameters:

• Type: D-Type Flip-Flop
• Number of Elements: 2
• Number of Bits per Element: 1
• Output Type: Complementary
• Function: Set (Preset) and Reset
• Trigger Type: Positive Edge

Electrical Parameters:

• Clock Frequency: 46 MHz
• Max Propagation Delay @ V, Max CL: 25 ns @ 5.5V, 50pF
• Voltage - Supply: 4.5V ~ 5.5V
• Current - Output High, Low: 4mA, 4mA
• Current - Quiescent (Iq): 4 µA
• Input Capacitance: 3 pF
• Operating Temperature: -40°C ~ 85°C (TA)

Mechanical Parameters:

• Mounting Type: Through Hole
• Package / Case: 14-DIP (0.300", 7.62mm)
• Supplier Device Package: 14-PDIP

Compliance Parameters:

• RoHS Status: ROHS3 Compliant
• REACH Status: REACH Unaffected

Substitute parts must match all functional, electrical, mechanical, and compliance parameters without deviation.

Parameter Comparison

Engineering Selection Recommendations

The SN74HCT74N is the direct substitute for the SN74HCT74NG4. Both components are manufactured by Texas Instruments and belong to the 74HCT series. All functional, electrical, mechanical, and compliance parameters are identical. The primary distinction is product status: the SN74HCT74NG4 is discontinued at DiGi Electronics, while the SN74HCT74N maintains active status with higher inventory availability (5880 pcs vs. 1156 pcs). Both components meet ROHS3 compliance and REACH unaffected status requirements. The SN74HCT74N is packaged in tube format, whereas the SN74HCT74NG4 packaging format is not specified. Pin configuration, electrical performance, and thermal characteristics are equivalent, supporting direct board-level substitution without circuit modification.

Frequently Asked Questions (FAQ)

Q: Can the SN74HCT74N directly replace the SN74HCT74NG4 in existing designs?

A: Yes. Both components are identical in functional specification, electrical performance, and package configuration (14-DIP). No circuit modifications are required for substitution.

Q: Are there differences in pin configuration between these parts?

A: No. Both the SN74HCT74NG4 and SN74HCT74N use the 14-PDIP package with identical pin assignments and functionality.

Q: What is the significance of the product status difference?

A: The SN74HCT74NG4 is discontinued at DiGi Electronics, indicating limited future availability. The SN74HCT74N maintains active status with established supply channels and higher inventory levels, supporting long-term design continuity.

Q: Do both parts meet the same compliance standards?

A: Yes. Both components are ROHS3 compliant and REACH unaffected, meeting equivalent regulatory requirements.

Q: Is there a difference in packaging format between these parts?

A: The SN74HCT74N is supplied in tube packaging. The SN74HCT74NG4 packaging format is not specified in the provided data. Both use the same 14-PDIP case configuration.

Q: Are the electrical characteristics identical?

A: Yes. Supply voltage range (4.5V ~ 5.5V), clock frequency (46 MHz), propagation delay (25 ns @ 5.5V, 50pF), output current (4mA), quiescent current (4 µA), and operating temperature range (-40°C ~ 85°C) are identical across both parts.