Texas Instruments CD74HC157M96

Overview

CD74HC157M96 from Texas Instruments is a high-speed CMOS quad 2-input non-inverting multiplexer with common select (S) and active-low enable (E) inputs, operating from 2V to 6V supply, supporting -55°C to +125°C industrial/military temperature range, and delivering propagation delays as low as 25ns at 4.5V with 50pF load. It routes four parallel data bits from dual sources to shared outputs in logic-level translation, register-to-bus transfer, and function generation circuits.

For engineers reviewing the CD74HC157M96 datasheet, CD74HC157M96 pinout, CD74HC157M96 application, or CD74HC157M96 equivalent, key selection considerations include its HC-family voltage flexibility (2–6V), guaranteed operation across extended temperature, non-inverting output behavior, SOIC-16 tape-and-reel packaging, and compatibility with LSTTL fanout requirements (10 loads).

Technical Context

The CD74HC157M96 implements four independent 2:1 multiplexers sharing one Select (S) input and one active-low Enable (E) input. Its outputs (1Y–4Y) are forced low when E is high, and reflect selected inputs (I0 or I1 per channel) when E is low - distinguishing it from the inverting CD74HC158 family.

It uses standard CMOS silicon process with buffered inputs/outputs, balanced rise/fall times, and rail-to-rail switching. Propagation delay is specified down to 25ns (typ.) at 4.5V/50pF, and input thresholds meet HC logic levels (VIH = 3.15V min, VIL = 1.35V max at VCC = 4.5V), ensuring noise immunity of ≥30% of VCC.

Key Specifications

Pinout & Package

CD74HC157M96 is housed in a 16-pin SOIC (Small Outline Integrated Circuit) package with 1.27mm pitch, RoHS-compliant lead finish (NiPdAu), and moisture sensitivity level (MSL) Level-1 (unlimited floor life at ≤30°C/60% RH).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad 2-input multiplexer applications.

Compared with CD74HC157M96, CD74HCT157M96 trades supply flexibility for TTL input compatibility, while SN74LV157AQPWRQ1 adds automotive qualification and faster speed at the cost of broader temperature coverage and higher unit cost.

Availability

CD74HC157M96 is available at Aetrix Electronics and suitable for industrial control systems, aerospace data acquisition, automated test equipment, and legacy system upgrades requiring stable component supply across extended temperature ranges and long lifecycle support.

Supply support for CD74HC157M96 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 ICs, with decades of heritage in high-reliability logic families including the 74HC series.

The CD74HC157M96 belongs to TI's industry-standard 74HC logic portfolio, designed for robust, low-power, wide-voltage digital signal routing in mission-critical industrial, military, and aerospace applications.

FAQ

What is the supply voltage range supported by CD74HC157M96?

The CD74HC157M96 operates from 2V to 6V DC supply voltage. This wide range allows direct use with 3.3V and 5V systems without level shifters, and supports battery-powered designs where supply voltage may vary. Operation outside this range - below 2V or above 6V - risks functional failure or permanent damage per absolute maximum ratings.

How does CD74HC157M96 differ from CD74HC158M96?

The CD74HC157M96 is a non-inverting quad 2-input multiplexer: its outputs (1Y–4Y) replicate the selected input (I0 or I1). In contrast, CD74HC158M96 is inverting - its outputs are logical complements of the selected inputs. Both share identical pinout, supply range, and timing specs, but functional behavior differs fundamentally in signal polarity handling.

Is CD74HC157M96 pin-compatible with CD74HCT157M96?

Yes, CD74HC157M96 and CD74HCT157M96 share identical SOIC-16 pinout, terminal functions, and mechanical footprint. However, they differ electrically: HC supports 2–6V operation with CMOS input thresholds, while HCT is limited to 4.5–5.5V and features TTL-compatible inputs. No PCB changes are needed for substitution, but supply and interface logic must align with the chosen variant.

What is the maximum propagation delay for CD74HC157M96 across its full temperature range?

The maximum propagation delay for CD74HC157M96 is 38ns (tPLH/tPHL) at VCC = 4.5V, CL = 50pF, and TA = -55°C to +125°C. At 6V, the max delay is 32ns under same conditions. These values ensure predictable timing in synchronous digital systems operating across extreme environmental conditions.

Does CD74HC157M96 require external pull-up or pull-down resistors on its control pins?

No, CD74HC157M96 does not require external pull-up or pull-down resistors on S or E pins because its inputs are CMOS-buffered with high impedance and defined thresholds. However, in systems with floating control lines during power-up or reset, external resistors (e.g., 10kΩ to VCC or GND) are recommended to prevent metastability or unintended output states before firmware initialization.