Texas Instruments CD74ACT157M96

Overview

CD74ACT157M96 from Texas Instruments is a quadruple 2-line to 1-line data selector/multiplexer in SOIC-16 package, operating at 4.5V–5.5V V_CC, with ±24mA output drive, balanced propagation delays (t_PLH/t_PHL ≤ 9.5ns), and TTL-voltage-compatible inputs. It routes four independent 2:1 data paths under shared A/B address and active-low strobe (G) control, used in bus switching and digital signal routing within industrial control logic.

For engineers reviewing the CD74ACT157M96 datasheet, CD74ACT157M96 pinout, CD74ACT157M96 application, or CD74ACT157M96 equivalent, key selection criteria include its 16-pin SOIC package, guaranteed operation from –55°C to +125°C, ±2kV HBM ESD rating, CMOS push-pull output structure, and compatibility with legacy TTL-level drivers in mixed-logic systems.

Technical Context

The CD74ACT157M96 implements four independent 2:1 multiplexers sharing one address input (A/B) and one active-low output enable (G). Each Y output reflects the selected A or B input when G is high; all outputs force low when G is low - enabling synchronized channel blanking. Its asynchronous operation requires no clock, and all channels respond identically to address and strobe transitions.

Designed in SCR-latchup-resistant CMOS process, it features TTL-compatible input thresholds (V_IL = 0.8V, V_IH = 2.0V), balanced t_PLH/t_PHL (≤ 9.5ns max over full temperature range), and push-pull outputs capable of driving 15 F-type loads. Input transition rate must be ≤10 ns/V to prevent oscillation and excessive power draw.

Key Specifications

Pinout & Package

CD74ACT157M96 is supplied in 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 Level-1 moisture sensitivity rating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CD74ACT157M96, SN74ACT157DR offers identical performance with enhanced supply chain continuity, while 74VHC157M trades TTL compatibility and drive strength for wider voltage flexibility - making it unsuitable as a drop-in replacement in legacy 5V systems.

Availability

CD74ACT157M96 is available at Aetrix Electronics and suitable for industrial control systems, automotive engine management modules, and legacy system upgrades requiring stable component supply, extended temperature support, and proven 5V logic interoperability.

Supply support for CD74ACT157M96 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 decades of experience in high-reliability industrial and automotive IC design.

The CD74ACT157M96 belongs to TI's advanced CMOS logic family, engineered for robust 5V system integration, backward compatibility with TTL, and operation in harsh thermal environments.

FAQ

What is the maximum operating temperature range for CD74ACT157M96?

The CD74ACT157M96 is specified for continuous operation from –55°C to +125°C, validated across this full industrial/military temperature range per TI's qualification standards. This makes CD74ACT157M96 suitable for under-hood automotive applications, aerospace subsystems, and industrial controllers exposed to extreme ambient conditions. Electrical parameters such as propagation delay and output drive remain guaranteed within these limits.

Does CD74ACT157M96 require external pull-up or pull-down resistors on unused inputs?

Yes - all unused inputs of CD74ACT157M96 must be terminated to either V_CC or GND to prevent floating states that cause excessive power consumption or oscillation. A 10 kΩ resistor is recommended for pull-up/pull-down biasing when inputs are intermittently driven. Direct connection is acceptable for permanently unused inputs. Leaving any input unconnected violates the Recommended Operating Conditions and risks device malfunction.

Can CD74ACT157M96 drive a 50 pF load while meeting all datasheet timing specifications?

Yes - CD74ACT157M96 switching characteristics (t_PLH, t_PHL) are characterized with C_L = 50 pF, and all timing parameters in Section 5.6 assume this load. Driving larger capacitive loads will increase propagation delay and may degrade signal integrity; TI recommends limiting total load capacitance to ≤50 pF for guaranteed spec compliance. Layout practices like short traces and ground plane coupling help maintain this target.

Is CD74ACT157M96 pin-compatible with older CD74HC157 or CD74HCT157 devices?

No - CD74ACT157M96 shares the same 16-pin SOIC footprint and pinout as CD74HC157 and CD74HCT157, but differs electrically: it features higher drive (±24 mA vs. ±4 mA), faster speed (≤9.5 ns vs. ≤24 ns), and true TTL-compatible inputs (V_IH = 2.0 V). While physically interchangeable, substituting CD74ACT157M96 into HC/HCT designs may overload upstream drivers or alter timing margins; verify system-level compatibility before replacement.

What is the purpose of the G (strobe) pin on CD74ACT157M96?

The G pin on CD74ACT157M96 is an active-low output enable that forces all four Y outputs (1Y–4Y) to logic low regardless of the A/B address or input states. This enables synchronized blanking of all multiplexer outputs - useful for glitch-free bus arbitration, test mode isolation, or power sequencing. When G is high, normal 2:1 selection resumes. The pin is TTL-compatible and draws negligible current in either state.