74HC109N,652 Equivalent & Substitute Parts

Part Overview

The 74HC109N,652 is a dual JK-type flip-flop logic integrated circuit manufactured by NXP Semiconductors in a 16-DIP package. This component functions as a Set(Preset) and Reset element with complementary outputs, designed for positive edge-triggered applications. The part is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity.

Substiute Parts

74HC109N,652

NXP SemiconductorsIn Stock: 110274HC109N,652 Datasheet

Current PartRFQ

CD74HC109E

Harris CorporationIn Stock: 60253CD74HC109E Datasheet

DirectRFQ

SN74HC109N

Texas InstrumentsIn Stock: 5016SN74HC109N Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74HC109N,652 are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Functional Parameters:

• JK-type flip-flop architecture with dual elements
• Complementary output configuration
• Positive edge trigger mechanism
• Set(Preset) and Reset functionality

Electrical Parameters:

• Supply voltage range: 2V ~ 6V
• Output current capability: 5.2 mA (high and low)
• Quiescent current: 4 µA
• Propagation delay performance at specified conditions

Mechanical Parameters:

• 16-DIP package form factor (0.300", 7.62mm)
• Through-hole mounting compatibility

Compliance Parameters:

• RoHS compliance status
• REACH compliance status

Substitute parts must maintain compatibility across all these parameter categories. Variations in clock frequency, propagation delay, input capacitance, and operating temperature range are acceptable provided they do not degrade system performance requirements.

Parameter Comparison

Engineering Selection Recommendations

SN74HC109N (Texas Instruments) is the primary substitute for the 74HC109N,652. This part maintains ROHS3 compliance, matching the original part's regulatory status. The SN74HC109N is currently in active production status, ensuring long-term availability and supply chain stability. Operating temperature range is -40°C ~ 85°C, which covers the lower end of the original specification but may require verification for applications requiring the full -40°C ~ 125°C range. Propagation delay and output current specifications are identical to the original part.

CD74HC109E (Harris Corporation) is a functional equivalent but carries RoHS non-compliance status, which may conflict with regulatory requirements for new designs or procurement policies. This part is also obsolete. The operating temperature range extends to -55°C, providing broader low-temperature coverage than the original part. Propagation delay is 31 ns, marginally higher than the original 30 ns specification. Input capacitance is specified at 10 pF, compared to 4.6 pF for the original part, which may affect circuit timing in sensitive applications.

Selection should prioritize SN74HC109N for new designs and ongoing production due to active status and compliance alignment. CD74HC109E may be considered only when supply constraints exist and RoHS non-compliance is acceptable within the application context.

Frequently Asked Questions (FAQ)

Q: Can SN74HC109N directly replace 74HC109N,652 in existing designs?

A: Yes, SN74HC109N is a direct functional replacement. Both parts share identical JK-type flip-flop architecture, complementary output configuration, positive edge triggering, and 16-DIP package form factor. Electrical parameters including supply voltage (2V ~ 6V), output current (5.2 mA), and propagation delay (30 ns @ 6V, 50pF) are equivalent. Operating temperature range for SN74HC109N is -40°C ~ 85°C; applications requiring operation above 85°C require evaluation.

Q: What is the difference between the three substitute options?

A: All three parts are 74HC-series dual JK-type flip-flops in 16-DIP packages with identical functional specifications. The primary differences are: (1) SN74HC109N is in active production with ROHS3 compliance; (2) CD74HC109E is obsolete with RoHS non-compliance but offers extended low-temperature operation (-55°C); (3) 74HC109N,652 is the original obsolete NXP part. Clock frequency varies (81 MHz for NXP, 60 MHz for Harris and TI), and input capacitance differs (4.6 pF for NXP, 10 pF for Harris, 3 pF for TI).

Q: Are there any package compatibility concerns?

A: No. All three parts use identical 16-DIP (0.300", 7.62mm) through-hole packages. Pin-to-pin compatibility is maintained, allowing direct socket substitution without PCB modifications.

Q: Does RoHS compliance matter for my application?

A: RoHS compliance is mandatory for products sold in the European Union and increasingly required by major OEMs globally. SN74HC109N and 74HC109N,652 are ROHS3 compliant. CD74HC109E is RoHS non-compliant and should not be used in applications subject to RoHS regulations.

Q: Which part should I select for new designs?

A: SN74HC109N (Texas Instruments) is the recommended choice for new designs. It is in active production, ROHS3 compliant, and provides long-term supply security. Verify that the operating temperature range (-40°C ~ 85°C) meets your application requirements.

Q: Can I use CD74HC109E if SN74HC109N is unavailable?

A: CD74HC109E is functionally compatible but carries RoHS non-compliance status. Use only if supply constraints are critical and RoHS compliance is not required. Verify that the extended low-temperature range (-55°C) and higher input capacitance (10 pF) do not negatively impact circuit performance.