74HC193D,652 Binary Counter Equivalent & Substitute Parts

Part Overview

The 74HC193D,652 is a 4-bit binary up/down counter IC manufactured by Nexperia USA Inc. in a 16-SOIC surface mount package. This logic component is classified as obsolete, indicating discontinued production. Due to its obsolete status, identifying functionally equivalent substitute parts is essential for design continuity, board redesigns, and component procurement in legacy system maintenance and new applications requiring this counter functionality.

Key Parameters

Parameter	Value
Logic Type	Binary Counter
Direction	Up, Down
Number of Bits per Element	4 Bit
Reset Type	Asynchronous
Timing	Synchronous
Trigger Type	Positive Edge
Voltage Supply Range	2 V ~ 6 V
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution eligibility for the 74HC193D,652 is determined by the following core parameters:

Logic Function: Binary counter with up/down counting capability
Bit Width: 4-bit configuration
Reset Mechanism: Asynchronous reset
Timing Architecture: Synchronous operation
Trigger Mechanism: Positive edge triggering
Supply Voltage Compatibility: 2 V ~ 6 V operating range
Package Compatibility: 16-SOIC or 16-SO surface mount packages with equivalent pin pitch (0.154" or 0.209" width variants)

All substitute parts listed maintain these core functional and electrical parameters. Variations in count rate, operating temperature range, and product status are noted but do not preclude substitution when the above criteria are met. Package width variations (0.154" vs 0.209") represent different SOIC body widths but maintain identical pin configurations and pitch.

Parameter Comparison

Parameter	74HC193D,652 (Main)	CD74HC193M	CD74HC193M96	CD74HC193MT	SN74HC193D	SN74HC193DR	SN74HC193NSR
Manufacturer	Nexperia USA Inc.	Harris Corporation	Harris Corporation	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Logic Type	Binary Counter	Binary Counter	Binary Counter	Binary Counter	Binary Counter	Binary Counter	Binary Counter
Direction	Up, Down	Up, Down	Up, Down	Up, Down	Up, Down	Up, Down	Up, Down
Number of Bits	4	4	4	4	4	4	4
Reset Type	Asynchronous	Asynchronous	Asynchronous	Asynchronous	Asynchronous	Asynchronous	Asynchronous
Timing	Synchronous	Synchronous	Synchronous	Synchronous	Synchronous	Synchronous	Synchronous
Trigger Type	Positive Edge	Positive Edge	Positive Edge	Positive Edge	Positive Edge	Positive Edge	Positive Edge
Voltage Supply	2 V ~ 6 V	2 V ~ 6 V	2 V ~ 6 V	2 V ~ 6 V	2 V ~ 6 V	2 V ~ 6 V	2 V ~ 6 V
Operating Temperature	-40°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Count Rate	49 MHz	29 MHz	29 MHz	29 MHz	24 MHz	24 MHz	24 MHz
Package / Case	16-SOIC (0.154", 3.90mm)	16-SOIC (0.154", 3.90mm)	16-SOIC (0.154", 3.90mm)	16-SOIC (0.154", 3.90mm)	16-SOIC (0.154", 3.90mm)	16-SOIC (0.154", 3.90mm)	16-SOIC (0.209", 5.30mm)
Product Status	Obsolete	Obsolete	Obsolete	Last Time Buy	Last Time Buy	Active	Active
RoHS Status	ROHS3 Compliant	RoHS non-compliant	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: SN74HC193DR

The SN74HC193DR is the preferred substitute for the 74HC193D,652. This Texas Instruments part maintains full functional equivalence across all core parameters: 4-bit binary up/down counter, asynchronous reset, synchronous timing, positive edge triggering, and 2 V ~ 6 V supply voltage compatibility. The SN74HC193DR carries Active product status, ensuring long-term availability and supply chain stability. It is ROHS3 compliant with unlimited moisture sensitivity level (MSL 1), meeting modern environmental and reliability standards. The 16-SOIC package with 0.154" width matches the original footprint precisely.

Secondary Recommendation: SN74HC193NSR

The SN74HC193NSR provides an alternative from Texas Instruments with identical functional specifications and Active product status. This part uses a 16-SO package with 0.209" width, requiring PCB layout verification for footprint compatibility. It is ROHS3 compliant and maintains the same electrical performance as the primary recommendation.

Tertiary Recommendation: CD74HC193MT

The CD74HC193MT from Texas Instruments offers Last Time Buy status with ROHS3 compliance. It maintains full functional equivalence and is available in Tape & Reel packaging. This option is suitable for applications where the primary recommendation is unavailable.

Not Recommended: CD74HC193M and CD74HC193M96

Harris Corporation parts CD74HC193M and CD74HC193M96 are functionally equivalent but carry RoHS non-compliant status. These parts are suitable only for legacy applications where RoHS compliance is not required.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 74HC193D,652 with any of the listed parts?

A: Yes, all listed parts are functionally equivalent 4-bit binary up/down counters with identical logic operation, pin configuration, and electrical characteristics within the specified supply voltage range. However, product status and compliance certifications differ. For new designs, SN74HC193DR or SN74HC193NSR are recommended due to Active status and ROHS3 compliance.

Q: What is the difference between the 16-SOIC (0.154") and 16-SOIC (0.209") packages?

A: Both packages maintain identical pin pitch and electrical connectivity. The difference is body width: 0.154" (3.90mm) versus 0.209" (5.30mm). PCB footprints must accommodate the specific body width. The SN74HC193NSR uses the wider 0.209" package and requires footprint verification before substitution.

Q: Why does the 74HC193D,652 have a higher count rate (49 MHz) than some substitutes (24-29 MHz)?

A: Count rate variations reflect manufacturing process differences between manufacturers and production eras. All parts meet the synchronous timing and positive edge trigger specifications. The lower count rates of substitute parts do not affect functional compatibility in standard applications operating below these maximum frequencies.

Q: Are the Harris Corporation parts (CD74HC193M, CD74HC193M96) suitable for new designs?

A: These parts are functionally equivalent but RoHS non-compliant. They are suitable only for legacy system repairs or applications where RoHS compliance is not mandated. For new designs, ROHS3 compliant alternatives are recommended.

Q: What is the significance of "Last Time Buy" versus "Active" product status?

A: Active status indicates ongoing production and long-term availability. Last Time Buy indicates limited remaining inventory with no future production. Active parts (SN74HC193DR, SN74HC193NSR) are preferred for new designs and long-term supply security.

Q: Can I use these substitutes in applications requiring the full -40°C to 125°C temperature range?

A: The 74HC193D,652 operates -40°C to 125°C. Texas Instruments parts (SN74HC193D, SN74HC193DR, SN74HC193NSR) operate -40°C to 85°C, which is narrower. Harris Corporation parts (CD74HC193M, CD74HC193M96, CD74HC193MT) operate -55°C to 125°C. Verify application temperature requirements before substitution.

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