Texas Instruments SN74LVC157ADRE4

Overview

SN74LVC157ADRE4 from Texas Instruments is a quadruple 2-line to 1-line data selector/multiplexer in SOIC-16 package, operating from 1.65V to 3.6V with ±24mA output drive, 5.2ns max propagation delay at 3.3V, and 5.5V-tolerant inputs. It serves as a logic-level translation and signal routing IC in digital bus arbitration, FPGA I/O expansion, and mixed-voltage system interconnects.

For engineers reviewing the SN74LVC157ADRE4 datasheet, SN74LVC157ADRE4 pinout, SN74LVC157ADRE4 application, or SN74LVC157ADRE4 equivalent, key selection criteria include its 16-pin SOIC package, active-low output strobe (G), A/B address select control, quad-channel true-output multiplexing, and compatibility with both 3.3V and 5V input sources in industrial and embedded control designs.

Technical Context

The SN74LVC157ADRE4 implements four independent 2:1 multiplexers sharing a common address select (A/B) and active-low enable (G) input. Each channel routes either input A or B to its dedicated output (Y) based on the A/B state when G is low; all outputs go low when G is high.

Its CMOS design supports 1.65V–3.6V V_CC, accepts 0–5.5V input voltages regardless of supply, and delivers rail-to-rail output swing. Propagation delay varies with voltage: 5.2ns typical at 3.3V, 7.4ns at 2.7V, and 15.5ns at 1.8V - enabling precise timing analysis in synchronous logic interfaces.

Key Specifications

Pinout & Package

SN74LVC157ADRE4 uses a 16-pin SOIC (D) package measuring 9.90 mm × 6.00 mm (body: 9.90 mm × 3.90 mm), RoHS-compliant with NIPDAU lead finish and MSL Level-1 rating.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar data selector/multiplexer applications.

Compared with SN74LVC157ADR and 74LVC157PW, the SN74LVC157ADRE4 offers identical functionality in a standard SOIC-16 package with industry-standard NIPDAU plating and full –40°C to +125°C qualification - making it the most broadly deployable option across automotive, industrial, and telecom infrastructure designs.

Availability

SN74LVC157ADRE4 is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and FPGA-based prototyping requiring stable component supply and long-term lifecycle support.

Supply support for SN74LVC157ADRE4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions with over 90 years of innovation in high-reliability components.

The SN74LVC157ADRE4 belongs to TI's LVC logic family, designed specifically for low-voltage, high-speed digital interfacing in mixed-signal systems where power efficiency, noise immunity, and voltage translation are critical.

FAQ

What is the maximum input voltage rating for SN74LVC157ADRE4?

The SN74LVC157ADRE4 supports input voltages from 0V to 5.5V regardless of V_CC level - enabling direct connection to 5V TTL or CMOS outputs even when powered from 1.8V or 3.3V supplies. This eliminates external level-shifting circuitry in mixed-voltage designs and is confirmed in Section 4.1 Absolute Maximum Ratings and Section 4.4 Recommended Operating Conditions of the datasheet.

Does SN74LVC157ADRE4 support operation at 1.8V V_CC?

Yes, SN74LVC157ADRE4 is fully specified for 1.65V to 3.6V V_CC operation, including 1.8V ±0.15V. At this voltage, typical propagation delay is 5.5ns (max 13.5ns), and output drive is ±4mA - sufficient for low-power IoT sensor hubs and battery-operated edge devices. These values are documented in Table 4.9 Switching Characteristics.

How does the G (strobe) pin function in SN74LVC157ADRE4?

The G pin is an active-low output enable: when high, all four Y outputs are forced low regardless of A/B or data inputs; when low, the device performs normal 2:1 multiplexing per channel. This enables synchronized gating of multiple data paths - critical for bus arbitration and power-gated subsystems. The behavior is defined in Section 6.3 Device Functional Modes and the Function Table.

Is SN74LVC157ADRE4 pin-compatible with older 74LS157 or 74HC157 devices?

No, SN74LVC157ADRE4 is not pin-compatible with 74LS157 (16-pin PDIP only) or 74HC157 (SOIC-16 but different pin mapping). While all are quad 2:1 muxes, SN74LVC157ADRE4 uses TI's standardized LVC pinout (G on Pin 1, V_CC on Pin 16), whereas 74HC157 places G on Pin 15 and V_CC on Pin 16. Direct replacement requires PCB redesign.

What thermal considerations apply to SN74LVC157ADRE4 in SOIC package?

SN74LVC157ADRE4 in SOIC-16 has a junction-to-ambient thermal resistance (R_θJA) of 118.1°C/W. At 500mW max power dissipation and 125°C max ambient, junction temperature reaches ~184°C - exceeding absolute max. Derating is required above 70°C (8 mW/K). Use of ground-plane copper and thermal vias is recommended for sustained operation above 85°C ambient.