SN74LVC257ADRG4 Equivalent & Substitute Parts

Part Overview

The SN74LVC257ADRG4 is a 4 x 2:1 multiplexer logic integrated circuit manufactured by Texas Instruments in a 16-SOIC surface mount package. This part is discontinued at DiGi Electronics but remains available through inventory channels with 1,002 pieces in stock. The device operates as a single-supply multiplexer with output current capability of 24mA high and 24mA low, designed for low-voltage digital signal routing applications. Equivalent and substitute parts are necessary due to product discontinuation status and to ensure long-term supply chain continuity.

Key Parameters

Parameter	Value
Type	Multiplexer
Circuit Configuration	4 x 2:1
Independent Circuits	1
Current - Output High, Low	24mA, 24mA
Voltage Supply Source	Single Supply
Voltage - Supply Range	1.65V ~ 3.6V
Operating Temperature Range	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	16-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the SN74LVC257ADRG4 is determined by the following critical parameters: multiplexer circuit configuration (4 x 2:1), package type (16-SOIC surface mount), output current capability (24mA minimum), supply voltage range compatibility (minimum 1.65V), and operating temperature range (-40°C to 85°C minimum). Parts meeting these criteria are functionally interchangeable at the circuit level. The substitute parts listed below satisfy these core requirements while maintaining electrical and mechanical compatibility.

Parameter Comparison

Parameter	SN74LVC257ADRG4	SN74LVC257ADR	74LCX257MX	74LVC257AD,118	MC74LCX257DR2G
Manufacturer	Texas Instruments	Texas Instruments	Fairchild Semiconductor	Nexperia USA Inc.	onsemi
Circuit Configuration	4 x 2:1	4 x 2:1	4 x 2:1	4 x 2:1	4 x 2:1
Independent Circuits	1	1	1	1	1
Current - Output High, Low	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA	8mA, 8mA
Voltage - Supply Range	1.65V ~ 3.6V	1.65V ~ 3.6V	2V ~ 3.6V	1.2V ~ 3.6V	2.3V ~ 3.6V
Operating Temperature Range	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC
Product Status	Discontinued at DiGi Electronics	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Not specified	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

SN74LVC257ADR (Texas Instruments) is the primary substitute, offering identical electrical specifications and active product status with 4,844 pieces in inventory. This part maintains full compatibility with the original SN74LVC257ADRG4 across all critical parameters and is supplied in Tape & Reel packaging.

74LVC257AD,118 (Nexperia USA Inc.) provides an extended operating temperature range to 125°C and lower minimum supply voltage (1.2V), with 3,007 pieces available. This part is suitable for applications requiring enhanced temperature performance while maintaining ROHS3 compliance and MSL 1 rating.

74LCX257MX (Fairchild Semiconductor) maintains full electrical compatibility with 10,114 pieces in stock. The minimum supply voltage is 2V, which is higher than the original part. This part is suitable for applications operating above 2V.

MC74LCX257DR2G (onsemi) features reduced output current (8mA versus 24mA) and a higher minimum supply voltage (2.3V). This part is suitable only for applications with lower current requirements and supply voltages above 2.3V, with 1,627 pieces available.

Frequently Asked Questions (FAQ)

Q: Can SN74LVC257ADR directly replace SN74LVC257ADRG4? A: Yes. SN74LVC257ADR is a direct substitute with identical circuit configuration, output current, supply voltage range, operating temperature, and 16-SOIC package. Both parts are manufactured by Texas Instruments and maintain full electrical and mechanical compatibility.

Q: What is the key difference between 74LVC257AD,118 and the original part? A: 74LVC257AD,118 extends the operating temperature range to 125°C (versus 85°C) and supports a lower minimum supply voltage of 1.2V (versus 1.65V). All other electrical parameters remain identical. This part is manufactured by Nexperia USA Inc.

Q: Can MC74LCX257DR2G be used as a substitute? A: MC74LCX257DR2G is compatible only in applications where output current requirements do not exceed 8mA and supply voltage remains above 2.3V. The original part provides 24mA output current and operates from 1.65V. This part is suitable for lower-power applications only.

Q: Are all substitute parts ROHS3 compliant? A: SN74LVC257ADR, 74LVC257AD,118, and MC74LCX257DR2G are all ROHS3 compliant. 74LCX257MX compliance status is not specified in available documentation.

Q: What packaging options are available for substitute parts? A: SN74LVC257ADR and 74LVC257AD,118 are supplied in Tape & Reel (TR) packaging. 74LCX257MX and MC74LCX257DR2G packaging specifications are as listed. All parts use the 16-SOIC surface mount package format.

Q: Which substitute part has the highest inventory availability? A: 74LCX257MX has the highest inventory with 10,114 pieces in stock, followed by SN74LVC257ADR with 4,844 pieces.

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