SN74LVC157ADRG4 Equivalent & Substitute Parts

Part Overview

The SN74LVC157ADRG4 is a 4 x 2:1 multiplexer logic IC manufactured by Texas Instruments in 16-SOIC surface mount packaging. This part is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and procurement. The device operates as a single independent 4-channel 2:1 multiplexer with output drive capability of 24mA high and 24mA low, suitable for low-voltage digital signal routing applications.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution for the SN74LVC157ADRG4 is determined by strict equivalence across the following parameters:

Circuit configuration: 4 x 2:1 multiplexer topology
Independent circuits: 1
Output current capability: 24mA high and 24mA low
Supply voltage range: 2V ~ 3.6V minimum (or lower)
Operating temperature range: -40°C ~ 85°C minimum
Package type: 16-SOIC form factor
Mounting: Surface mount

Substitute parts are grouped into two categories: parametric equivalents (identical electrical and mechanical specifications) and manufacturer-recommended alternatives (functionally equivalent with minor specification variations).

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage Supply	Operating Temp	Output Current (H/L)	Package	Inventory
SN74LVC157ADRG4	Texas Instruments	Discontinued	2V ~ 3.6V	-40°C ~ 85°C	24mA / 24mA	16-SOIC	2320 Pcs
SN74LVC157ADR	Texas Instruments	Active	2V ~ 3.6V	-40°C ~ 85°C	24mA / 24mA	16-SOIC	3700 Pcs
SN74LVC157ADRG3	Texas Instruments	Active	2V ~ 3.6V	-40°C ~ 85°C	24mA / 24mA	16-SOIC	1645 Pcs
SN74LVC157ADT	Texas Instruments	Active	2V ~ 3.6V	-40°C ~ 85°C	24mA / 24mA	16-SOIC	2278 Pcs
74LCX157M	Fairchild Semiconductor	Active	2V ~ 3.6V	-40°C ~ 85°C	24mA / 24mA	16-SOIC	20300 Pcs
74LVC157AD,118	NXP Semiconductors	Active	1.2V ~ 3.6V	-40°C ~ 125°C	24mA / 24mA	16-SOIC	44449 Pcs
74LCX157MX	Fairchild Semiconductor	Active	2V ~ 3.6V	-40°C ~ 85°C	24mA / 24mA	16-SOIC	20900 Pcs
74LCX257MX	Fairchild Semiconductor	Active	2V ~ 3.6V	-40°C ~ 85°C	24mA / 24mA	16-SOIC	10114 Pcs
MC74LCX157DR2G	onsemi	Active	2V ~ 3.6V	-40°C ~ 85°C	24mA / 24mA	16-SOIC	5300 Pcs

Engineering Selection Recommendations

All listed substitute parts meet the core electrical and mechanical requirements of the SN74LVC157ADRG4. Selection should prioritize active product status for long-term availability.

Texas Instruments parametric equivalents (SN74LVC157ADR, SN74LVC157ADRG3, SN74LVC157ADT) provide direct functional replacement with identical specifications and ROHS3 compliance. These parts differ only in packaging format (Tape & Reel) and manufacturing date codes.

The NXP Semiconductors 74LVC157AD,118 offers enhanced specifications with extended voltage range (1.2V ~ 3.6V) and higher operating temperature ceiling (-40°C ~ 125°C), providing superior performance margin in demanding applications while maintaining full parametric compatibility.

Fairchild Semiconductor 74LCX157M, 74LCX157MX, and 74LCX257MX represent the 74LCX logic family variant. These parts maintain identical electrical performance and package form factor. The 74LCX257MX uses a different base product number (74LCX257 versus 74LCX157) but delivers equivalent 4 x 2:1 multiplexer functionality.

onsemi MC74LCX157DR2G provides ROHS3 compliance and MSL Level 1 rating, suitable for high-reliability applications requiring moisture sensitivity documentation.

Frequently Asked Questions (FAQ)

Q: Can I directly replace SN74LVC157ADRG4 with SN74LVC157ADR?

A: Yes. Both parts are Texas Instruments 74LVC157 multiplexers with identical electrical specifications (2V ~ 3.6V supply, 24mA output drive, -40°C ~ 85°C operating range) and 16-SOIC packaging. The difference is packaging format: ADRG4 is tube packaging while ADR is Tape & Reel. Electrical performance and pinout are identical.

Q: What is the difference between 74LCX and 74LVC logic families?

A: Both 74LCX and 74LVC are low-voltage CMOS multiplexer families with identical electrical performance for this 4 x 2:1 configuration. The primary difference is manufacturer: 74LVC is Texas Instruments/NXP, while 74LCX is Fairchild Semiconductor. All maintain 24mA output drive and 2V ~ 3.6V supply compatibility.

Q: Is the NXP 74LVC157AD,118 a direct replacement?

A: Yes, with enhanced specifications. It provides the same 4 x 2:1 multiplexer function, 24mA output drive, and 16-SOIC package. The NXP part extends voltage range to 1.2V ~ 3.6V and operating temperature to -40°C ~ 125°C, making it suitable for applications requiring lower supply voltage or higher temperature operation.

Q: Why does 74LCX257MX have a different base product number?

A: The 74LCX257 and 74LCX157 are distinct product lines within the Fairchild 74LCX family. However, both implement identical 4 x 2:1 multiplexer topology with matching electrical specifications and 16-SOIC packaging, making them functionally equivalent for this application.

Q: Are all substitute parts ROHS3 compliant?

A: Texas Instruments and onsemi parts explicitly state ROHS3 compliance. Fairchild Semiconductor and NXP parts do not list explicit ROHS status in the provided specifications. Verify ROHS compliance documentation with the supplier if this certification is required for your application.

Q: What is the inventory advantage of these substitutes?

A: The NXP 74LVC157AD,118 offers the highest inventory (44449 Pcs), followed by Fairchild 74LCX157MX (20900 Pcs) and 74LCX157M (20300 Pcs). These alternatives provide superior supply chain availability compared to the discontinued SN74LVC157ADRG4 (2320 Pcs remaining).

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