SN74F169N Equivalent & Substitute Parts

Part Overview

The SN74F169N is a 4-bit binary counter IC manufactured by Texas Instruments in the 74F logic family. This component functions as a synchronous up/down counter with positive edge triggering, designed for digital counting and sequencing applications. The part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production support. The SN74F169N operates at a maximum count rate of 100 MHz with supply voltage range of 4.5 V to 5.5 V and is housed in a 16-pin DIP package suitable for through-hole mounting.

Substiute Parts

SN74F169N

Texas InstrumentsIn Stock: 3310SN74F169N Datasheet

Current PartRFQ

SN74ALS169BN

Texas InstrumentsIn Stock: 3491SN74ALS169BN Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74F169N is determined by strict equivalence in the following critical parameters:

• Logic Type: Binary Counter (4-bit, 1 element)
• Direction: Up/Down counting capability
• Timing: Synchronous operation
• Trigger Type: Positive edge triggering
• Package / Case: 16-DIP (0.300", 7.62mm) form factor
• Mounting Type: Through Hole
• Voltage - Supply: 4.5 V ~ 5.5 V compatibility
• Operating Temperature: 0°C ~ 70°C range

The SN74ALS169BN qualifies as a manufacturer-recommended substitute because it maintains identical functional specifications, package geometry, and electrical operating parameters. Both parts are manufactured by Texas Instruments and share the same pinout and signal definitions required for direct board-level replacement.

Parameter Comparison

Engineering Selection Recommendations

The SN74ALS169BN is the manufacturer-recommended substitute for the obsolete SN74F169N. Both parts maintain identical pinout, package dimensions, and core functional specifications. The SN74ALS169BN offers the advantage of active product status, ensuring continued availability and manufacturing support.

The primary difference between these parts is the maximum count rate: the SN74F169N operates at 100 MHz while the SN74ALS169BN operates at 40 MHz. Component selection should be based on the specific timing requirements of the application. For applications requiring count rates below 40 MHz, the SN74ALS169BN provides a direct functional replacement. For applications requiring the full 100 MHz count rate capability, alternative parts from the 74F or higher-speed logic families must be evaluated.

Both parts maintain ROHS3 compliance and are suitable for industrial and commercial temperature ranges. The through-hole 16-DIP package format ensures compatibility with existing PCB designs without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the SN74ALS169BN directly replace the SN74F169N on existing circuit boards?

A: Yes, the SN74ALS169BN provides direct pin-for-pin replacement with identical package geometry and pinout. No PCB modifications are required for physical installation.

Q: What is the significance of the 100 MHz versus 40 MHz count rate difference?

A: The count rate specifies the maximum frequency at which the counter can reliably operate. The SN74F169N supports count rates up to 100 MHz, while the SN74ALS169BN supports up to 40 MHz. Applications operating below 40 MHz are unaffected by this difference. Applications requiring higher count rates must verify that 40 MHz meets their timing specifications.

Q: Are there any electrical parameter differences between these parts?

A: Both parts share identical supply voltage range (4.5 V to 5.5 V) and operating temperature range (0°C to 70°C). The primary electrical difference is the maximum count rate capability.

Q: Why is the SN74F169N classified as obsolete?

A: The SN74F169N has reached end-of-life status with Texas Instruments. The SN74ALS169BN represents the active product line continuation for this counter function.

Q: Are both parts RoHS compliant?

A: Yes, both the SN74F169N and SN74ALS169BN are ROHS3 compliant, meeting environmental and regulatory requirements for electronic components.