74HC244DB,112 Equivalent & Substitute Parts

Part Overview

The 74HC244DB,112 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-SSOP package. The part is currently listed as obsolete, making equivalent and substitute parts essential for ongoing design support and production continuity. Identifying compatible alternatives ensures system functionality while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
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)
Mounting Type	Surface Mount
Package / Case	20-SSOP (0.209", 5.30mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 74HC244DB,112 is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

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
Mounting Type: Surface Mount
Base Product Number: 74HC244

Package Compatibility Considerations: Substitute parts are grouped into two package categories: 20-SSOP (0.209", 5.30mm Width) and 20-TSSOP (0.173", 4.40mm Width). Both packages are surface-mount compatible and maintain identical electrical specifications. Package selection depends on PCB layout constraints and footprint availability.

Operating Temperature Range: The main part specifies -40°C ~ 125°C. Substitute parts with -40°C ~ 85°C operating range are electrically compatible but have a narrower temperature specification. Parts with -40°C ~ 125°C maintain full specification alignment.

Parameter Comparison

Part Number	Manufacturer	Package / Case	Operating Temperature	Product Status	Inventory (Pcs)	RoHS Status
74HC244DB,112	Nexperia USA Inc.	20-SSOP (0.209", 5.30mm)	-40°C ~ 125°C	Obsolete	1105	ROHS3 Compliant
74HC244PW,118	NXP Semiconductors	20-TSSOP (0.173", 4.40mm)	-40°C ~ 125°C	Active	3637	Not specified
MM74HC244MTCX	onsemi	20-TSSOP (0.173", 4.40mm)	-40°C ~ 85°C	Active	2058	ROHS3 Compliant
SN74HC244DBR	Texas Instruments	20-SSOP (0.209", 5.30mm)	-40°C ~ 85°C	Active	5100	ROHS3 Compliant
SN74HC244PW	Texas Instruments	20-TSSOP (0.173", 4.40mm)	-40°C ~ 85°C	Discontinued at DiGi Electronics	3009	ROHS3 Compliant
SN74HC244PWR	Texas Instruments	20-TSSOP (0.173", 4.40mm)	-40°C ~ 85°C	Active	55400	ROHS3 Compliant
SN74HC244PWT	Texas Instruments	20-TSSOP (0.173", 4.40mm)	-40°C ~ 85°C	Discontinued at DiGi Electronics	1191	ROHS3 Compliant
SN74HC244QPWREP	Texas Instruments	20-TSSOP (0.173", 4.40mm)	-40°C ~ 125°C	Active	911	ROHS3 Compliant
SN74HC244QPWRG4Q1	Texas Instruments	20-TSSOP (0.173", 4.40mm)	-40°C ~ 125°C	Active	3190	ROHS3 Compliant
SN74HC244QPWRQ1	Texas Instruments	20-TSSOP (0.173", 4.40mm)	-40°C ~ 125°C	Active	3284	ROHS3 Compliant

Engineering Selection Recommendations

For 20-SSOP Package Requirement: SN74HC244DBR (Texas Instruments) is the primary active substitute maintaining the same 20-SSOP package footprint. This part is currently in active production status with substantial inventory availability (5100 pcs). Both parts are ROHS3 compliant. Operating temperature specification is -40°C ~ 85°C, which is narrower than the original part's -40°C ~ 125°C range.

For 20-TSSOP Package Compatibility: Multiple active alternatives exist. SN74HC244PWR (Texas Instruments) offers the highest inventory level (55400 pcs) and active product status. SN74HC244QPWREP, SN74HC244QPWRG4Q1, and SN74HC244QPWRQ1 maintain the full -40°C ~ 125°C operating temperature range. The SN74HC244QPWRG4Q1 and SN74HC244QPWRQ1 variants include automotive-grade qualification (AEC-Q100).

For NXP/onsemi Sourcing: 74HC244PW,118 (NXP Semiconductors) and MM74HC244MTCX (onsemi) provide alternative manufacturer options, both in 20-TSSOP packages with active product status and ROHS3 compliance.

Compliance Considerations: All substitute parts listed are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the original part's environmental specifications. REACH status is unaffected across all alternatives.

Frequently Asked Questions (FAQ)

Q: Can I use a 20-TSSOP package substitute in place of the 20-SSOP original? A: Package substitution requires PCB footprint verification. The 20-TSSOP (0.173", 4.40mm width) and 20-SSOP (0.209", 5.30mm width) packages have different physical dimensions and pin spacing. Direct footprint compatibility cannot be assumed. Consult your PCB layout and component placement documentation before substitution.

Q: What is the difference between SN74HC244PWR and SN74HC244PW? A: Both are Texas Instruments 74HC244 buffers in 20-TSSOP packages with identical electrical specifications. SN74HC244PWR is listed as active product status with higher inventory (55400 pcs), while SN74HC244PW is discontinued at DiGi Electronics. For new designs, SN74HC244PWR is the recommended choice.

Q: Are automotive-grade variants (SN74HC244QPWRG4Q1, SN74HC244QPWRQ1) suitable for non-automotive applications? A: Yes. Automotive-grade parts with AEC-Q100 qualification meet or exceed standard industrial specifications. These variants maintain full electrical compatibility and can be used in non-automotive applications. They offer enhanced reliability screening and are interchangeable from an electrical standpoint.

Q: Does operating temperature range affect substitution compatibility? A: Operating temperature range defines the guaranteed performance envelope. Parts with -40°C ~ 85°C specification are electrically compatible with the original -40°C ~ 125°C part but have a narrower temperature guarantee. If your application requires operation above 85°C, select substitutes with -40°C ~ 125°C rating: SN74HC244QPWREP, SN74HC244QPWRG4Q1, or SN74HC244QPWRQ1.

Q: What is the significance of the part number suffixes (DB, PW, DBR, PWR, PWT, QPWREP, QPWRQ1)? A: Suffixes indicate package type and packaging format. DB/DBR = SSOP package; PW/PWR/PWT = TSSOP package. Additional qualifiers (Q, R, EP) denote qualification level, reel format, or special processing. All variants maintain identical core electrical specifications for the 74HC244 buffer function.

Q: Is RoHS3 compliance mandatory for my application? A: RoHS3 compliance is a regulatory requirement in many markets. All listed substitute parts are ROHS3 compliant, ensuring compatibility with environmental and procurement standards. Verify your specific application requirements with your quality and compliance team.

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