SN74LVC244ADBRE4 Equivalent & Substitute Parts

Part Overview

The SN74LVC244ADBRE4 is a non-inverting buffer logic IC manufactured by Texas Instruments, featuring 2 elements with 4 bits per element and 3-state output capability. This device is designed for low-voltage digital signal buffering and distribution applications with supply voltage range of 1.65V to 3.6V.

The SN74LVC244ADBRE4 is currently discontinued at DiGi Electronics. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements.

Substiute Parts

SN74LVC244ADBRE4

Texas InstrumentsIn Stock: 1218SN74LVC244ADBRE4 Datasheet

Current PartRFQ

SN74LVC244ADBR

Texas InstrumentsIn Stock: 3249SN74LVC244ADBR Datasheet

Parametric EquivalentRFQ

74LCX2244MTCX

Fairchild SemiconductorIn Stock: 387274LCX2244MTCX Datasheet

MFR RecommendedRFQ

74LCX244MTC

onsemiIn Stock: 819274LCX244MTC Datasheet

MFR RecommendedRFQ

74LCX244MTCX

onsemiIn Stock: 1926974LCX244MTCX Datasheet

MFR RecommendedRFQ

74LVC2244APW,118

NXP SemiconductorsIn Stock: 11219274LVC2244APW,118 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74LVC244ADBRE4 is determined by the following critical parameters:

Functional Parameters:

• Logic Type: Buffer, Non-Inverting
• Number of Elements: 2
• Number of Bits per Element: 4
• Output Type: 3-State

Electrical Parameters:

• Current - Output High, Low: 24mA, 24mA (minimum requirement)
• Voltage - Supply: Must support 1.65V ~ 3.6V range
• Operating Temperature: Must support -40°C ~ 125°C range

Physical Parameters:

• Mounting Type: Surface Mount
• Package compatibility: 20-pin SSOP or 20-pin TSSOP variants

Substitute parts are grouped into two categories:

Category 1 - Direct Parametric Equivalent: SN74LVC244ADBR maintains identical electrical specifications and 20-SSOP packaging, differing only in product status (Active vs. Discontinued) and packaging format (Cut Tape & Digi-Reel vs. Bulk).

Category 2 - Functional Equivalents with Parameter Variations: 74LCX2244MTCX, 74LCX244MTC, 74LCX244MTCX, and 74LVC2244APW,118 provide equivalent logic functionality with modified electrical or thermal specifications and alternative package formats (20-TSSOP).

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute - SN74LVC244ADBR: This Texas Instruments part is the recommended first choice for direct replacement. It maintains identical electrical specifications (24mA output current, 1.65V ~ 3.6V supply voltage, -40°C ~ 125°C operating range) and 20-SSOP packaging. The part is currently Active in product status with 3200 units in stock. ROHS3 compliance and MSL 1 rating match the original specification.

Alternative Substitutes - 74LCX Series (74LCX2244MTCX, 74LCX244MTC, 74LCX244MTCX): These onsemi and Fairchild Semiconductor parts provide functional equivalence with the following trade-offs:

• Output current reduced to 12mA (Fairchild 74LCX2244MTCX) or maintained at 24mA (onsemi variants)
• Supply voltage minimum increased to 2V (not compatible with 1.65V operation)
• Operating temperature range limited to -40°C ~ 85°C (not suitable for 125°C applications)
• Package format changed to 20-TSSOP (0.173" width vs. 0.209" for SSOP)

These parts are suitable only for applications that do not require the full 1.65V minimum supply voltage or 125°C maximum operating temperature.

Alternative Substitute - 74LVC2244APW,118: This NXP Semiconductors part maintains the 74LVC series designation with extended supply voltage range (1.2V ~ 3.6V) and full operating temperature support (-40°C ~ 125°C). Output current is reduced to 12mA. Package format is 20-TSSOP. This part is suitable for applications requiring lower minimum supply voltage but can tolerate reduced output drive capability.

Frequently Asked Questions (FAQ)

Q: Can I use 74LCX244MTCX as a direct replacement for SN74LVC244ADBRE4?

A: 74LCX244MTCX is functionally equivalent but with electrical and thermal limitations. The supply voltage minimum is 2V (vs. 1.65V for the original), and the operating temperature range is limited to -40°C ~ 85°C (vs. -40°C ~ 125°C). Use this part only if your application does not require operation below 2V or above 85°C.

Q: What is the difference between 20-SSOP and 20-TSSOP packaging?

A: Both are 20-pin surface mount packages. The 20-SSOP has a body width of 0.209" (5.30mm), while the 20-TSSOP has a body width of 0.173" (4.40mm). The TSSOP is a thinner, more compact variant. PCB layout and footprint design must accommodate the specific package selected.

Q: Is SN74LVC244ADBR the best substitute for the discontinued SN74LVC244ADBRE4?

A: Yes. SN74LVC244ADBR is the parametric equivalent with identical electrical specifications and 20-SSOP packaging. It is currently Active in product status with adequate inventory availability. The only differences are packaging format (Cut Tape & Digi-Reel vs. Bulk) and product status.

Q: Can I use 74LVC2244APW,118 if my application requires 1.2V supply voltage operation?

A: Yes. 74LVC2244APW,118 supports supply voltage down to 1.2V, extending the lower voltage range beyond the original specification. However, output current is reduced to 12mA. Verify that your circuit design can function with this reduced drive capability.

Q: Are all substitute parts ROHS3 compliant?

A: ROHS3 compliance is confirmed for SN74LVC244ADBR, 74LCX244MTC, and 74LCX244MTCX. Compliance status is not specified in the provided data for 74LCX2244MTCX and 74LVC2244APW,118. Verify compliance requirements with the manufacturer if regulatory certification is mandatory for your application.

Q: What inventory levels are available for each substitute?

A: SN74LVC244ADBR has 3200 units in stock. 74LCX2244MTCX has 3800 units. 74LCX244MTC has 8111 units. 74LCX244MTCX has 19200 units. 74LVC2244APW,118 has 112147 units. Inventory levels support production requirements across all substitute options.