SN74HC393PW Equivalent & Substitute Parts

Part Overview

The SN74HC393PW is a binary counter IC manufactured by Texas Instruments, featuring 2 elements of 4-bit counters with negative edge triggering. This component is classified as a logic counter in the 74HC series and is housed in a 14-TSSOP surface mount package. The SN74HC393PW is currently discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design requirements and production needs.

Key Parameters

Parameter	Value
Logic Type	Binary Counter
Number of Elements	2
Number of Bits per Element	4
Direction	Up
Trigger Type	Negative Edge
Reset	Asynchronous
Voltage - Supply	2 V ~ 6 V
Operating Temperature Range	-40°C ~ 85°C
Package / Case	14-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Count Rate	36 MHz
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the SN74HC393PW are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Logic Type & Configuration: Binary Counter with 2 elements, 4 bits per element, up direction, negative edge trigger, asynchronous reset
Electrical Specifications: Supply voltage range 2 V ~ 6 V, operating temperature range, count rate capability
Package Compatibility: 14-TSSOP surface mount package with identical physical dimensions (0.173", 4.40mm Width)
Compliance & Certification: RoHS3 compliance, MSL rating, REACH status

All substitute parts listed maintain identical logic functionality, package form factor, and core electrical parameters. Variations in count rate and operating temperature ranges are noted where they exceed the original specification, providing enhanced performance margins.

Parameter Comparison

Parameter	SN74HC393PW (Main)	SN74HC393PWR	74HC393PW,118	MC74HC393ADTR2G
Manufacturer	Texas Instruments	Texas Instruments	NXP Semiconductors	onsemi
Logic Type	Binary Counter	Binary Counter	Binary Counter	Binary Counter
Number of Elements	2	2	2	2
Number of Bits per Element	4	4	4	4
Direction	Up	Up	Up	Up
Trigger Type	Negative Edge	Negative Edge	Negative Edge	Negative Edge
Reset	Asynchronous	Asynchronous	Asynchronous	Asynchronous
Voltage - Supply	2 V ~ 6 V	2 V ~ 6 V	2 V ~ 6 V	2 V ~ 6 V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-55°C ~ 125°C
Count Rate	36 MHz	36 MHz	107 MHz	50 MHz
Package / Case	14-TSSOP	14-TSSOP	14-TSSOP	14-TSSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Discontinued	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

SN74HC393PWR (Texas Instruments) is the direct substitute from the original manufacturer. It maintains identical electrical and thermal specifications to the SN74HC393PW while offering active product status and improved availability. This part is supplied in Cut Tape and Digi-Reel packaging formats.

74HC393PW,118 (NXP Semiconductors) is a manufacturer-recommended alternative that provides enhanced performance margins with a maximum count rate of 107 MHz and extended operating temperature range to 125°C. This part is suitable for applications requiring higher frequency operation or wider temperature tolerance.

MC74HC393ADTR2G (onsemi) is a manufacturer-recommended alternative offering the widest operating temperature range (-55°C ~ 125°C) and a count rate of 50 MHz. This part is supplied in Tape & Reel packaging and is appropriate for industrial and extended-temperature applications.

All three substitute parts maintain ROHS3 compliance, MSL rating of 1, and identical 14-TSSOP package geometry, ensuring direct mechanical and electrical compatibility with the original SN74HC393PW design.

Frequently Asked Questions (FAQ)

Q: Can SN74HC393PWR be used as a direct replacement for SN74HC393PW?

A: Yes. SN74HC393PWR is manufactured by Texas Instruments and maintains identical logic configuration, electrical specifications, and package form factor. The only difference is product status (active vs. discontinued) and packaging format (Cut Tape/Digi-Reel vs. Tube).

Q: What are the key differences between the three substitute parts?

A: All three parts share identical logic functionality and package specifications. The primary differences are: manufacturer (Texas Instruments, NXP, onsemi), count rate capability (36 MHz, 107 MHz, 50 MHz respectively), operating temperature range (85°C, 125°C, 125°C maximum), and packaging format (Cut Tape, Bulk, Tape & Reel).

Q: Are there any compatibility concerns when substituting these parts?

A: No compatibility concerns exist for the listed substitutes. All parts feature the same 14-TSSOP package dimensions, identical pin configuration, and equivalent electrical characteristics within the specified supply voltage range of 2 V ~ 6 V.

Q: Which substitute should I select for high-frequency applications?

A: The 74HC393PW,118 from NXP Semiconductors offers the highest count rate at 107 MHz, making it suitable for applications requiring maximum frequency performance.

Q: Which substitute is best for extended temperature range applications?

A: The MC74HC393ADTR2G from onsemi provides the widest operating temperature range (-55°C ~ 125°C), making it appropriate for industrial and harsh environment applications.

Q: Do all substitutes maintain RoHS3 compliance?

A: SN74HC393PWR and MC74HC393ADTR2G are explicitly ROHS3 compliant. The 74HC393PW,118 RoHS status is not specified in the provided data.

Q: What is the MSL rating for these parts?

A: All listed parts carry an MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions for storage and handling.

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