74HC244D,652 Equivalent & Substitute Parts

Part Overview

The 74HC244D,652 is a non-inverting buffer logic IC manufactured by Nexperia USA Inc., featuring 2 elements with 4 bits per element and 3-state output capability. This component operates across a 2V to 6V supply voltage range and is housed in a 20-SOIC surface mount package. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	74HC244D,652
Manufacturer	Nexperia USA Inc.
Logic Type	Buffer, Non-Inverting
Number of Elements	2
Number of Bits per Element	4
Output Type	3-State
Current - Output High, Low	7.8mA, 7.8mA
Voltage - Supply	2V ~ 6V
Operating Temperature	-40°C ~ 125°C (TA)
Package / Case	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the 74HC244D,652 is determined by the following critical parameters:

Logic type: Buffer, Non-Inverting
Number of elements: 2
Number of bits per element: 4
Output type: 3-State
Output current capability: 7.8mA (high and low)
Supply voltage range: 2V ~ 6V minimum
Package: 20-SOIC form factor
Mounting type: Surface Mount

Substitute parts must maintain identical functional specifications across these parameters. Variations in operating temperature range, product status (active vs. discontinued), packaging format (tube, tape & reel, cut tape), and moisture sensitivity level do not affect functional interchangeability when the core electrical and mechanical parameters remain constant.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Elements	Bits/Element	Output Type	Current (mA)	Supply Voltage	Temp Range (°C)	Package	Product Status
74HC244D,652	Nexperia USA Inc.	Buffer, Non-Inverting	2	4	3-State	7.8 / 7.8	2V ~ 6V	-40 ~ 125	20-SOIC	Obsolete
74HC244D,653	Nexperia USA Inc.	Buffer, Non-Inverting	2	4	3-State	7.8 / 7.8	2V ~ 6V	-40 ~ 125	20-SOIC	Active
MC74HC244ADWR2G	onsemi	Buffer, Non-Inverting	2	4	3-State	7.8 / 7.8	2V ~ 6V	-55 ~ 125	20-SOIC	Active
CD74HC244M	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	7.8 / 7.8	2V ~ 6V	-55 ~ 125	20-SOIC	Discontinued at DiGi Electronics
CD74HC244M96	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	7.8 / 7.8	2V ~ 6V	-55 ~ 125	20-SOIC	Active
MC74HC244ADWG	onsemi	Buffer, Non-Inverting	2	4	3-State	7.8 / 7.8	2V ~ 6V	-55 ~ 125	20-SOIC	Active
MM74HC244WM	onsemi	Buffer, Non-Inverting	2	4	3-State	7.8 / 7.8	2V ~ 6V	-40 ~ 85	20-SOIC	Active
MM74HC244WMX	Fairchild Semiconductor	Buffer, Non-Inverting	2	4	3-State	7.8 / 7.8	2V ~ 6V	-40 ~ 85	20-SOIC	Active
SN74HC244DW	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	7.8 / 7.8	2V ~ 6V	-40 ~ 85	20-SOIC	Discontinued at DiGi Electronics
SN74HC244DWR	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	7.8 / 7.8	2V ~ 6V	-40 ~ 85	20-SOIC	Active
SN74HC244MDWREP	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	7.8 / 7.8	2V ~ 6V	-55 ~ 125	20-SOIC	Active

Engineering Selection Recommendations

For applications currently using the obsolete 74HC244D,652, the following selection criteria apply:

Primary Recommendation: 74HC244D,653 from Nexperia USA Inc. provides direct functional equivalence with identical electrical specifications and operating temperature range. This part maintains active product status and is available in cut tape and digi-reel packaging formats.

Extended Temperature Range Requirement: When operating temperature range of -55°C to 125°C is required, select from MC74HC244ADWR2G (onsemi), CD74HC244M96 (Texas Instruments), MC74HC244ADWG (onsemi), or SN74HC244MDWREP (Texas Instruments). All maintain identical core functional parameters while extending the lower temperature limit.

Standard Temperature Range (−40°C to 85°C): MM74HC244WM, MM74HC244WMX, SN74HC244DW, and SN74HC244DWR are suitable for applications with this narrower operating window.

Compliance Consideration: All substitute parts listed maintain ROHS3 compliance and REACH unaffected status, consistent with the original part specification.

Frequently Asked Questions (FAQ)

Q: Can 74HC244D,653 be used as a direct replacement for 74HC244D,652?

A: Yes. Both parts share identical functional specifications: 2-element, 4-bit non-inverting buffer with 3-state output, 7.8mA output current, 2V to 6V supply voltage, and 20-SOIC package. The primary difference is product status (active vs. obsolete) and packaging format availability.

Q: What is the difference between parts with operating temperature ranges of -40°C to 125°C versus -55°C to 125°C?

A: The extended range (-55°C to 125°C) provides operation at lower ambient temperatures. Selection depends on application requirements. Both ranges maintain identical electrical performance within their specified limits.

Q: Are there packaging format differences among the substitute parts?

A: Yes. Substitute parts are available in multiple packaging formats: cut tape with digi-reel, tape & reel, and tube. These format variations do not affect electrical or mechanical compatibility; selection depends on procurement and assembly requirements.

Q: Do all substitute parts meet RoHS compliance?

A: All listed substitute parts maintain ROHS3 compliance status, consistent with the original 74HC244D,652 specification.

Q: What is the significance of moisture sensitivity level (MSL) differences?

A: MSL ratings indicate storage and handling requirements. MSL 1 (unlimited) parts have no moisture sensitivity restrictions. MSL 3 (168 hours) parts require controlled storage conditions. This does not affect functional performance but impacts logistics and shelf-life management.

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