CD74HC377M Equivalent & Substitute Parts

Part Overview

The CD74HC377M is a D-type flip-flop logic integrated circuit manufactured by Texas Instruments, featuring 1 element with 8-bit parallel data storage capability. This device operates as a positive edge-triggered flip-flop in a 20-SOIC surface mount package. The main part is currently in Last Time Buy status, indicating production discontinuation. Equivalent and substitute parts are necessary to maintain design continuity and ensure long-term component availability for new production runs and field replacements.

Key Parameters

Parameter	CD74HC377M
Manufacturer	Texas Instruments
Series	74HC
Type	D-Type Flip-Flop
Number of Elements	1
Number of Bits per Element	8
Output Type	Non-Inverted
Clock Frequency	60 MHz
Max Propagation Delay @ 6V, 50pF	30 ns
Trigger Type	Positive Edge
Voltage Supply Range	2V ~ 6V
Current - Output High/Low	5.2 mA / 5.2 mA
Current - Quiescent (Iq)	8 µA
Input Capacitance	10 pF
Operating Temperature	-55°C ~ 125°C
Package / Case	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the CD74HC377M is determined by the following critical parameters:

Primary Substitution Criteria:

Base product number (74HC377 series)
D-type flip-flop architecture with 8-bit configuration
Positive edge trigger functionality
Non-inverted output type
20-SOIC package footprint compatibility
Voltage supply range overlap (minimum 2V ~ 6V)
Operating temperature range (minimum -40°C ~ 125°C acceptable)
Surface mount technology

Acceptable Parameter Variations:

Clock frequency may exceed 60 MHz (higher performance acceptable)
Propagation delay may be lower than 30 ns (faster operation acceptable)
Input capacitance may differ within device specifications
Quiescent current variations within logic family standards
Output current capability variations within non-inverted output specifications

Restricted Parameters (No Variation Allowed):

Output type must remain non-inverted (excludes tri-state variants)
Package must be 20-SOIC form factor
Trigger type must be positive edge
Number of bits per element must be 8

Parameter Comparison

Parameter	CD74HC377M	CD74HC377M96	74HC377D-Q100J	74HC377D,653	MC74HC377ADWR2G
Manufacturer	Texas Instruments	Texas Instruments	Nexperia USA Inc.	Nexperia USA Inc.	onsemi
Series	74HC	74HC	74HC	74HC	74HC
Type	D-Type	D-Type	D-Type	D-Type	D-Type
Output Type	Non-Inverted	Non-Inverted	Non-Inverted	Non-Inverted	Non-Inverted
Number of Bits	8	8	8	8	8
Clock Frequency	60 MHz	60 MHz	83 MHz	83 MHz	35 MHz
Max Propagation Delay @ 6V, 50pF	30 ns	30 ns	27 ns	27 ns	27 ns
Voltage Supply Range	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V
Current - Output High/Low	5.2 mA / 5.2 mA	5.2 mA / 5.2 mA	5.2 mA / 5.2 mA	5.2 mA / 5.2 mA	5.2 mA / 5.2 mA
Current - Quiescent (Iq)	8 µA	8 µA	8 µA	8 µA	4 µA
Input Capacitance	10 pF	10 pF	4.6 pF	4.6 pF	10 pF
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-55°C ~ 125°C
Package / Case	20-SOIC	20-SOIC	20-SOIC	20-SOIC	20-SOIC
Product Status	Last Time Buy	Active	Active	Active	Obsolete
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommended Substitutes (Active Status):

CD74HC377M96 (Texas Instruments) is the direct equivalent with identical electrical specifications and active product status. This part maintains the same manufacturer lineage and is the preferred choice for new designs and production continuity.

74HC377D-Q100J (Nexperia USA Inc.) provides enhanced performance with 83 MHz clock frequency and 27 ns propagation delay. This part includes AEC-Q100 automotive qualification and is suitable for applications requiring extended temperature range operation down to -40°C. The reduced input capacitance (4.6 pF) may benefit high-frequency applications.

74HC377D,653 (Nexperia USA Inc.) offers equivalent performance to 74HC377D-Q100J with active product status and standard industrial temperature range.

Secondary Substitute (Obsolete Status):

MC74HC377ADWR2G (onsemi) is functionally equivalent but carries obsolete product status. This part should be used only for field replacements or legacy system maintenance where new stock availability is confirmed.

Not Recommended for Direct Substitution:

74AHC374D,118 and 74AHC574D,118 feature tri-state output configuration, which differs from the non-inverted output requirement of the CD74HC377M. These parts are not suitable substitutes despite similar package and base architecture.

MC74HC374ADWG and MC74HC574ADWG feature tri-state outputs and are not compatible with non-inverted output specifications.

Frequently Asked Questions (FAQ)

Q: Can I use 74HC377D-Q100J as a direct replacement for CD74HC377M in existing designs?

A: Yes. The 74HC377D-Q100J maintains all critical functional parameters: 8-bit D-type flip-flop, positive edge trigger, non-inverted output, and 20-SOIC package. The enhanced clock frequency (83 MHz vs. 60 MHz) and faster propagation delay (27 ns vs. 30 ns) represent performance improvements. Operating temperature range is -40°C to 125°C, which covers the standard industrial range but does not extend to -55°C. Verify your application's minimum temperature requirement before selection.

Q: What is the difference between CD74HC377M and CD74HC377M96?

A: Both parts are manufactured by Texas Instruments with identical electrical specifications. The primary difference is packaging: CD74HC377M is supplied in Tube packaging, while CD74HC377M96 is supplied in Tape & Reel format. CD74HC377M96 has active product status, making it the preferred choice for new production orders.

Q: Why are 74AHC374D,118 and 74AHC574D,118 listed as non-compatible?

A: These parts feature tri-state output configuration with output enable control, whereas the CD74HC377M has non-inverted output without tri-state capability. The functional architecture differs fundamentally, making them unsuitable substitutes despite similar package and base logic family.

Q: Can I substitute MC74HC374ADWG or MC74HC574ADWG for CD74HC377M?

A: No. Both onsemi parts feature tri-state, non-inverted outputs, which differ from the CD74HC377M's non-inverted output specification. Additionally, these parts are based on 74HC374 and 74HC574 architectures rather than the 74HC377 architecture required for functional equivalence.

Q: What is the significance of the AEC-Q100 qualification on 74HC377D-Q100J?

A: AEC-Q100 qualification indicates the part meets automotive industry reliability and quality standards. This certification is relevant only if your application requires automotive-grade components. For standard industrial applications, this qualification provides no functional advantage but may increase component cost.

Q: Is the reduced input capacitance (4.6 pF) on Nexperia parts beneficial?

A: Lower input capacitance can reduce loading effects on driving circuits and may improve signal integrity in high-frequency applications. However, this parameter variation is within acceptable substitution criteria and does not affect functional compatibility for standard logic applications operating at or below 60 MHz.

Q: Should I avoid MC74HC377ADWR2G due to its obsolete status?

A: MC74HC377ADWR2G should be used only when existing stock is confirmed available and for field replacements of legacy systems. For new production designs, select CD74HC377M96, 74HC377D-Q100J, or 74HC377D,653, all of which have active product status and assured long-term availability.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message