SN74HC273PW Equivalent & Substitute Parts

Part Overview

The SN74HC273PW is a D-type flip-flop logic integrated circuit manufactured by Texas Instruments, featuring 1 element with 8-bit parallel data storage capability in a 20-TSSOP surface mount package. This device is classified as discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and procurement.

The 74HC273 series represents a standard logic family component used in digital systems requiring synchronous data capture and storage functions. Substitute parts must maintain electrical compatibility across supply voltage, propagation delay, output current, and thermal operating ranges while preserving the identical 20-TSSOP package footprint.

Key Parameters

Parameter	Value	Unit
Type	D-Type Flip Flop	—
Number of Elements	1	—
Number of Bits per Element	8	—
Output Type	Non-Inverted	—
Trigger Type	Positive Edge	—
Voltage - Supply	2V ~ 6V	—
Clock Frequency	36 MHz	MHz
Max Propagation Delay @ 6V, 150pF	46	ns
Current - Output High, Low	5.2, 5.2	mA
Current - Quiescent (Iq)	8	µA
Input Capacitance	3	pF
Operating Temperature	-40°C ~ 85°C	—
Package / Case	20-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 eligibility for the SN74HC273PW is determined by strict adherence to the following electrical and mechanical parameters:

Critical Compatibility Parameters:

Package type: 20-TSSOP (0.173", 4.40mm Width) — mandatory for PCB footprint compatibility
Logic family: 74HC series — ensures functional equivalence
Configuration: 1 element, 8-bit D-type flip-flop with positive edge trigger
Output type: Non-inverted
Supply voltage range: 2V ~ 6V minimum overlap required
Mounting type: Surface Mount

Performance Parameters (substitutes must meet or exceed):

Clock frequency: minimum 36 MHz
Propagation delay: maximum 46 ns @ 6V, 150pF load
Output current: minimum 5.2 mA (high and low)
Quiescent current: maximum 8 µA
Input capacitance: maximum 3 pF

Environmental & Compliance:

Operating temperature range must encompass -40°C to 85°C minimum
RoHS3 compliance required
MSL rating of 1 (Unlimited) preferred

All substitute parts listed below satisfy these criteria within their specified electrical and thermal operating ranges.

Parameter Comparison

Parameter	SN74HC273PW (Main)	SN74HC273PWR	MC74HC273ADTR2G	74HC273PW,118	74HC273PW-Q100J	MC74HC273ADTG	MM74HC273MTC	MM74HC273MTCX
Manufacturer	Texas Instruments	Texas Instruments	onsemi	Nexperia USA Inc.	Nexperia USA Inc.	onsemi	Fairchild Semiconductor	Fairchild Semiconductor
Product Status	Discontinued	Active	Active	Active	Active	Active	Active	Active
Type	D-Type	D-Type	D-Type	D-Type	D-Type	D-Type	D-Type	D-Type
Number of Elements	1	1	1	1	1	1	1	1
Number of Bits per Element	8	8	8	8	8	8	8	8
Output Type	Non-Inverted	Non-Inverted	Non-Inverted	Non-Inverted	Non-Inverted	Non-Inverted	Non-Inverted	Non-Inverted
Trigger Type	Positive Edge	Positive Edge	Positive Edge	Positive Edge	Positive Edge	Positive Edge	Positive Edge	Positive Edge
Voltage - Supply	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V
Clock Frequency	36 MHz	60 MHz	35 MHz	122 MHz	122 MHz	35 MHz	78 MHz	78 MHz
Max Propagation Delay @ 6V, 50pF	46 ns @ 150pF	27 ns	25 ns	26 ns	26 ns	25 ns	23 ns	23 ns
Current - Output High, Low	5.2, 5.2 mA	5.2, 5.2 mA	7.8, 7.8 mA	5.2, 5.2 mA	5.2, 5.2 mA	7.8, 7.8 mA	5.2, 5.2 mA	5.2, 5.2 mA
Current - Quiescent (Iq)	8 µA	8 µA	4 µA	8 µA	8 µA	4 µA	8 µA	8 µA
Input Capacitance	3 pF	3 pF	10 pF	4.6 pF	4.6 pF	10 pF	7 pF	7 pF
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-55°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	20-TSSOP	20-TSSOP	20-TSSOP	20-TSSOP	20-TSSOP	20-TSSOP	20-TSSOP	20-TSSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified	Not specified
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	Not specified	Not specified
Packaging Format	—	Cut Tape & Digi-Reel	Tape & Reel	Tape & Reel	Cut Tape & Digi-Reel	Tube	Bulk	Bulk
Inventory Status	2200 Pcs	300300 Pcs	3061 Pcs	6816 Pcs	3408 Pcs	1480 Pcs	2100 Pcs	2800 Pcs

Engineering Selection Recommendations

Primary Recommendation: SN74HC273PWR

The SN74HC273PWR from Texas Instruments is the direct active equivalent. It maintains identical electrical specifications to the discontinued SN74HC273PW while offering superior clock frequency performance (60 MHz vs. 36 MHz) and improved propagation delay (27 ns vs. 46 ns). Product status is active with substantial inventory availability (300,300 units). RoHS3 compliance and MSL-1 rating are confirmed. This part is the preferred choice for direct replacement in existing designs.

Secondary Recommendation: 74HC273PW,118

The 74HC273PW,118 from Nexperia USA Inc. is a manufacturer-recommended substitute offering the highest clock frequency specification (122 MHz) and fastest propagation delay (26 ns @ 6V, 50pF). Extended operating temperature range (-40°C to 125°C) provides additional thermal margin. Active product status with 6,816 units in stock. RoHS3 and MSL-1 compliant. Suitable for applications requiring enhanced performance headroom.

Tertiary Recommendation: MM74HC273MTCX

The MM74HC273MTCX from Fairchild Semiconductor provides equivalent performance with 78 MHz clock frequency and 23 ns propagation delay. Active status with 2,800 units available. Bulk packaging format. Suitable for high-volume procurement scenarios where packaging flexibility is acceptable.

Extended Temperature Applications: MC74HC273ADTR2G or MC74HC273ADTG

For designs requiring extended operating temperature range (-55°C to 125°C), the onsemi MC74HC273ADTR2G (Tape & Reel) or MC74HC273ADTG (Tube) provide specification compliance. Both maintain 25 ns propagation delay and 35 MHz clock frequency. Lower quiescent current (4 µA vs. 8 µA) offers power efficiency benefits. Active product status with adequate inventory.

Automotive-Grade Option: 74HC273PW-Q100J

The 74HC273PW-Q100J from Nexperia USA Inc. is qualified to AEC-Q100 automotive standards with identical electrical performance to 74HC273PW,118 (122 MHz, 26 ns propagation delay). Extended temperature range (-40°C to 125°C). Suitable for automotive and mission-critical applications requiring automotive-grade qualification.

Frequently Asked Questions (FAQ)

Q: Can I use SN74HC273PWR as a direct replacement for SN74HC273PW?

A: Yes. The SN74HC273PWR is electrically and mechanically compatible. Both devices share identical package geometry (20-TSSOP), logic configuration (1 element, 8-bit D-type flip-flop), supply voltage range (2V ~ 6V), output current specifications (5.2 mA), and quiescent current (8 µA). The SN74HC273PWR offers improved performance with higher clock frequency (60 MHz vs. 36 MHz) and faster propagation delay (27 ns vs. 46 ns). No design modifications are required.

Q: What is the difference between the Nexperia 74HC273PW,118 and 74HC273PW-Q100J?

A: Both parts are electrically identical with 122 MHz clock frequency and 26 ns propagation delay. The primary difference is qualification level: 74HC273PW-Q100J carries AEC-Q100 automotive qualification, making it suitable for automotive applications. The 74HC273PW,118 is standard industrial grade. Select 74HC273PW-Q100J for automotive designs; use 74HC273PW,118 for general industrial applications.

Q: Why do onsemi parts (MC74HC273ADTR2G, MC74HC273ADTG) have different input capacitance (10 pF vs. 3 pF)?

A: Input capacitance variation reflects manufacturing process differences between semiconductor vendors. The 10 pF specification for onsemi parts remains within acceptable limits for 74HC logic family applications. This parameter affects input loading characteristics but does not prevent functional substitution when circuit timing margins are adequate. Verify timing requirements in your specific application.

Q: Are all substitute parts RoHS3 compliant?

A: SN74HC273PWR, MC74HC273ADTR2G, 74HC273PW,118, 74HC273PW-Q100J, and MC74HC273ADTG are confirmed RoHS3 compliant. MM74HC273MTC and MM74HC273MTCX do not specify RoHS status in available documentation. For applications requiring RoHS3 certification, select from the confirmed compliant parts.

Q: What packaging formats are available for these substitute parts?

A: SN74HC273PWR is available in Cut Tape & Digi-Reel format. MC74HC273ADTR2G uses Tape & Reel. 74HC273PW,118 is supplied in Tape & Reel. 74HC273PW-Q100J uses Cut Tape & Digi-Reel. MC74HC273ADTG is packaged in Tube. MM74HC273MTC and MM74HC273MTCX are supplied in Bulk. Select packaging based on procurement volume and assembly line requirements.

Q: Can I use MC74HC273ADTR2G in applications requiring -40°C to 85°C operation?

A: Yes. The MC74HC273ADTR2G operating temperature range is -55°C to 125°C, which encompasses the -40°C to 85°C requirement. This part is fully compatible and offers extended thermal margin beyond the minimum specification.

Q: Which substitute offers the best propagation delay performance?

A: MM74HC273MTC and MM74HC273MTCX both specify 23 ns maximum propagation delay @ 6V, 50pF load, representing the fastest performance among all listed substitutes. These parts are suitable for timing-critical applications requiring minimum propagation delay.

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