CD74HCT109M Equivalent & Substitute Parts

Part Overview

The CD74HCT109M is a dual JK-type flip-flop logic integrated circuit manufactured by Texas Instruments in 16-SOIC surface mount packaging. This component functions as a Set/Preset and Reset element with complementary outputs, operating at a maximum clock frequency of 54 MHz. The part is currently in Last Time Buy status, making identification of equivalent and substitute components essential for design continuity and procurement planning. Substitute parts maintain functional equivalence while offering alternative packaging formats, manufacturers, or active product status.

Key Parameters

Parameter	Value
Manufacturer Part Number	CD74HCT109M
Manufacturer	Texas Instruments
Category	Logic
Type	JK Type Flip-Flop
Number of Elements	2
Number of Bits per Element	1
Output Type	Complementary
Clock Frequency	54 MHz
Voltage Supply Range	4.5V ~ 5.5V
Operating Temperature	-55°C ~ 125°C
Package Type	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Last Time Buy

Substitute Part Grouping Explanation

Substitution eligibility for the CD74HCT109M is determined by the following critical parameters:

Functional Equivalence Requirements:

Logic type: JK-type flip-flop with dual elements
Output configuration: Complementary outputs
Trigger mechanism: Positive edge triggered
Function: Set/Preset and Reset capability

Electrical Compatibility Requirements:

Voltage supply range: 4.5V ~ 5.5V
Clock frequency: Minimum 54 MHz
Output current capability: 4mA high and low
Quiescent current: 4 µA maximum

Physical Compatibility Requirements:

Package type: 16-SOIC or equivalent 16-pin SOIC footprint
Mounting type: Surface mount
Pin configuration: Identical to 74HCT109 base product

The substitute parts listed maintain these core parameters while differing in packaging format (Tape & Reel versus Tube), manufacturer, or product lifecycle status.

Parameter Comparison

Parameter	CD74HCT109M (Main)	CD74HCT109M96	74HCT109D,653	74HCT32BQ,115
Manufacturer	Texas Instruments	Texas Instruments	NXP Semiconductors	Nexperia USA Inc.
Logic Type	JK Flip-Flop (Dual)	JK Flip-Flop (Dual)	JK Flip-Flop (Dual)	OR Gate (4-Channel)
Number of Elements	2	2	2	4
Clock Frequency	54 MHz	54 MHz	55 MHz	N/A
Max Propagation Delay	40ns @ 4.5V, 50pF	40ns @ 4.5V, 50pF	35ns @ 4.5V, 50pF	24ns @ 4.5V, 50pF
Voltage Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Quiescent Current	4 µA	4 µA	4 µA	2 µA
Output Current (High/Low)	4mA / 4mA	4mA / 4mA	4mA / 4mA	4mA / 4mA
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package Type	16-SOIC	16-SOIC	16-SOIC	14-DHVQFN
Packaging Format	Tube	Tape & Reel	Bulk	Tape & Reel
Product Status	Last Time Buy	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

CD74HCT109M96 (Texas Instruments): This part is the manufacturer-recommended substitute, offering identical electrical specifications and 16-SOIC packaging. The primary difference is packaging format (Tape & Reel versus Tube) and active product status. This substitute is suitable for all applications where the main part is specified, with no design modifications required.

74HCT109D,653 (NXP Semiconductors): This NXP equivalent maintains JK flip-flop functionality with identical pin configuration and 16-SOIC package. Electrical performance is equivalent or superior (35ns propagation delay versus 40ns). The operating temperature range is narrower (-40°C to 125°C versus -55°C to 125°C), which may restrict use in extended temperature applications. This part is suitable for standard industrial temperature range applications.

74HCT32BQ,115 (Nexperia USA Inc.): This part is functionally distinct—it is a 4-channel OR gate rather than a dual JK flip-flop. While it shares the 74HCT logic family and identical supply voltage specifications, it cannot serve as a direct substitute for the CD74HCT109M due to different logic function and pin configuration. This part is listed in the provided substitute list but is not electrically or functionally equivalent.

Frequently Asked Questions (FAQ)

Q: Can CD74HCT109M96 be used as a direct replacement for CD74HCT109M?

A: Yes. CD74HCT109M96 is electrically and functionally identical to CD74HCT109M. Both are Texas Instruments 74HCT109 dual JK flip-flops in 16-SOIC packaging with identical electrical specifications. The only difference is packaging format (Tape & Reel versus Tube). No design modifications are required.

Q: What is the temperature range limitation of the NXP 74HCT109D,653?

A: The NXP part operates from -40°C to 125°C, compared to the Texas Instruments CD74HCT109M range of -55°C to 125°C. Applications requiring operation below -40°C must use the Texas Instruments variants.

Q: Is 74HCT32BQ,115 a suitable substitute for CD74HCT109M?

A: No. The 74HCT32BQ,115 is a 4-channel OR gate with different logic function and pin configuration. It cannot replace the dual JK flip-flop CD74HCT109M in any application.

Q: What are the packaging format differences between the substitute parts?

A: CD74HCT109M is supplied in Tube format. CD74HCT109M96 is supplied in Tape & Reel (TR) format, and 74HCT109D,653 is supplied in Bulk format. All three maintain identical 16-SOIC physical package dimensions and PCB footprints.

Q: Are all substitute parts RoHS3 compliant?

A: CD74HCT109M and CD74HCT109M96 are explicitly ROHS3 compliant. The NXP 74HCT109D,653 RoHS status is not specified in the provided data. The Nexperia 74HCT32BQ,115 is ROHS3 compliant.

Q: What is the propagation delay difference between the main part and NXP substitute?

A: The CD74HCT109M has a maximum propagation delay of 40ns at 4.5V with 50pF load. The NXP 74HCT109D,653 has a maximum propagation delay of 35ns under identical conditions, representing a 5ns improvement in switching speed.

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