CD74HC4094PW 8-Bit Shift Register with Tri-State Output — Equivalent & Substitute Parts

Part Overview

The CD74HC4094PW is an 8-stage shift register with storage latch and tri-state bus driver output, manufactured by Texas Instruments in a 16-TSSOP surface mount package. This part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications. The device performs serial-to-parallel conversion with tri-state output capability, suitable for bus interface and data storage applications in digital logic circuits.

Key Parameters

Parameter	Value
Logic Type	Shift Register
Output Type	Tri-State
Number of Elements	1
Number of Bits per Element	8
Function	Serial to Parallel
Voltage - Supply	2V ~ 6V
Operating Temperature	-55°C ~ 125°C
Package / Case	16-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the CD74HC4094PW is determined by strict equivalence across the following critical parameters:

Logic Function: All substitutes must be 8-bit shift registers with serial-to-parallel conversion capability
Output Configuration: Tri-state output is mandatory for bus driver compatibility
Package: 16-TSSOP surface mount package with identical 0.173" width specification
Voltage Supply Range: 2V ~ 6V operating range
Electrical Characteristics: Matching logic family (74HC series) ensures pin-compatible operation
Compliance: ROHS3 compliance and MSL Level 1 rating required for equivalent substitution

All listed substitutes meet these criteria. Variations in operating temperature range and product status (active vs. discontinued) do not affect functional equivalence but may impact availability and long-term supply chain considerations.

Parameter Comparison

Part Number	Manufacturer	Product Status	Logic Type	Output Type	Bits	Voltage Supply	Temp Range	Package	Automotive Grade
CD74HC4094PW	Texas Instruments	Discontinued	Shift Register	Tri-State	8	2V ~ 6V	-55°C ~ 125°C	16-TSSOP	No
CD74HC4094PWR	Texas Instruments	Active	Shift Register	Tri-State	8	2V ~ 6V	-55°C ~ 125°C	16-TSSOP	No
74HC4094PW,118	Nexperia USA Inc.	Active	Shift Register	Tri-State	8	2V ~ 6V	-40°C ~ 125°C	16-TSSOP	No
74HC4094PW-Q100J	Nexperia USA Inc.	Active	Shift Register	Tri-State	8	2V ~ 6V	-40°C ~ 125°C	16-TSSOP	Yes (AEC-Q100)
M74HC4094YTTR	STMicroelectronics	Active	Shift Register	Tri-State	8	2V ~ 6V	-40°C ~ 125°C	16-TSSOP	Yes (AEC-Q100)
MC74HC4094ADTR2G	onsemi	Last Time Buy	Shift Register	Tri-State	8	2V ~ 6V	-55°C ~ 125°C	16-TSSOP	No

Engineering Selection Recommendations

Primary Recommendation: CD74HC4094PWR (Texas Instruments) — Active product status with identical electrical specifications to the original CD74HC4094PW, including full -55°C ~ 125°C operating range. Packaging format (Cut Tape & Digi-Reel) supports both prototype and production volume requirements.

Secondary Recommendations:

74HC4094PW,118 or 74HC4094PW-Q100J (Nexperia USA Inc.) — Both active products with full functional equivalence. The Q100J variant includes AEC-Q100 automotive qualification for applications requiring automotive-grade components. Operating temperature range is -40°C ~ 125°C, suitable for most industrial and commercial applications.
M74HC4094YTTR (STMicroelectronics) — Active product with AEC-Q100 automotive qualification. Operating temperature range is -40°C ~ 125°C. Recommended for automotive and high-reliability applications.

Not Recommended for New Designs: MC74HC4094ADTR2G (onsemi) carries Last Time Buy status, indicating end-of-life trajectory. While functionally equivalent with -55°C ~ 125°C range, this part should not be selected for new production designs due to supply discontinuation risk.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitutes as a direct replacement for CD74HC4094PW?

A: Yes. All listed substitutes are pin-compatible and functionally equivalent. They share identical logic function (8-bit shift register with tri-state output), package (16-TSSOP), voltage supply range (2V ~ 6V), and electrical characteristics within the 74HC logic family. No circuit modifications are required.

Q: What is the difference between the packaging formats (Tube, Cut Tape, Tape & Reel)?

A: Packaging format affects handling and quantity per reel but does not affect electrical performance. Tube packaging is typical for small quantities. Cut Tape (CT) & Digi-Reel is suitable for mixed-volume orders. Tape & Reel (TR) is optimized for high-volume automated assembly. Select based on procurement volume and assembly process requirements.

Q: Why do some substitutes have a narrower operating temperature range (-40°C ~ 125°C vs. -55°C ~ 125°C)?

A: The narrower range (-40°C ~ 125°C) is still compliant with industrial and commercial temperature specifications. The original CD74HC4094PW and CD74HC4094PWR support the extended -55°C lower limit for military and aerospace applications. For standard industrial use, the -40°C ~ 125°C range is sufficient. Verify application requirements before selection.

Q: What does AEC-Q100 qualification mean?

A: AEC-Q100 is an automotive industry standard qualification for integrated circuits. Parts bearing this qualification (74HC4094PW-Q100J and M74HC4094YTTR) have undergone additional reliability testing and are approved for automotive applications. Use these variants if your application requires automotive-grade components.

Q: Is MC74HC4094ADTR2G still available for purchase?

A: MC74HC4094ADTR2G carries Last Time Buy status, indicating the manufacturer is discontinuing production. While inventory may still be available, this part should not be selected for new designs due to supply risk. Choose an active product instead.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitutes are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity rating, matching the original part's environmental compliance profile.

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