MM74C244WMX Equivalent & Substitute Parts

Part Overview

The MM74C244WMX is a non-inverting buffer IC manufactured by onsemi, designed for logic signal distribution and buffering applications. This device features 2 elements with 4 bits per element, 3-state output capability, and operates across a wide supply voltage range of 3V to 15V. The part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements.

Substiute Parts

MM74C244WMX

onsemiIn Stock: 1179MM74C244WMX Datasheet

Current PartRFQ

MM74HC244WMX

Fairchild SemiconductorIn Stock: 2295MM74HC244WMX Datasheet

SimilarRFQ

HEF40244BT,653

Nexperia USA Inc.In Stock: 1747HEF40244BT,653 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MM74C244WMX are identified based on the following critical parameters that determine functional compatibility:

Core Functional Requirements:

• Logic Type: Buffer, Non-Inverting
• Number of Elements: 2
• Number of Bits per Element: 4
• Output Type: 3-State
• Package / Case: 20-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount

Electrical Operating Range:

• Voltage - Supply compatibility
• Current - Output High, Low capability
• Operating Temperature range

Two substitute parts meet these criteria with varying electrical specifications:

1. MM74HC244WMX (Fairchild Semiconductor, 74HC Series) - Active product with reduced supply voltage range (2V ~ 6V) and lower output current (7.8mA, 7.8mA)

2. HEF40244BT,653 (Nexperia USA Inc., 4000B Series) - Active product with matching supply voltage range (3V ~ 15V) and comparable output current (62mA, 45mA)

Parameter Comparison

Engineering Selection Recommendations

MM74HC244WMX Selection Criteria: This substitute is suitable for applications where the reduced supply voltage range (2V ~ 6V) aligns with system requirements. The lower output current (7.8mA, 7.8mA) is appropriate for low-power logic signal distribution. Product status is active with current manufacturing availability. ECCN and HTSUS classifications match the original part.

HEF40244BT,653 Selection Criteria: This substitute maintains the original supply voltage range (3V ~ 15V), making it directly compatible with systems designed for the MM74C244WMX. Output current specifications (62mA, 45mA) are comparable to the original part. Product status is active with current manufacturing availability. RoHS3 compliance and REACH unaffected status are documented. ECCN and HTSUS classifications match the original part.

Frequently Asked Questions (FAQ)

Q: Can MM74HC244WMX replace MM74C244WMX in all applications? A: MM74HC244WMX is functionally equivalent in logic operation but operates at reduced supply voltage (2V ~ 6V versus 3V ~ 15V). Substitution is valid only if your system operates within the 2V ~ 6V range. Output current is also reduced (7.8mA versus 70mA), which may affect drive capability in high-current applications.

Q: Is HEF40244BT,653 a direct replacement for MM74C244WMX? A: HEF40244BT,653 maintains the same supply voltage range (3V ~ 15V) and similar output current specifications (62mA, 45mA). Pin configuration and package dimensions are identical (20-SOIC). This part is the closest functional equivalent for direct substitution.

Q: What are the package compatibility considerations? A: All three parts use the 20-SOIC package with identical dimensions (0.295", 7.50mm Width). PCB footprints are interchangeable. Mounting type is surface mount for all variants.

Q: How do operating temperature ranges affect substitution? A: MM74C244WMX operates from -55°C to 125°C. Both substitutes operate from -40°C to 85°C. If your application requires operation below -40°C or above 85°C, neither substitute is suitable.

Q: Are there compliance or regulatory differences between these parts? A: All three parts share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications. HEF40244BT,653 includes RoHS3 compliance documentation. All parts have MSL rating of 1 (Unlimited) or equivalent moisture sensitivity handling.