Texas Instruments CD74ACT153NSR

Overview

CD74ACT153NSR from Texas Instruments is a dual 4-line to 1-line data selector/multiplexer in SOP-16 package, operating at 4.5–5.5 V, with ±24-mA output drive, 4.5 ns minimum propagation delay (C-to-Y), and TTL-voltage-compatible inputs. It implements two independent 4:1 multiplexing sections with separate strobe (G) controls, used for signal routing in digital logic systems such as address/data path selection and test bus switching.

For engineers reviewing the CD74ACT153NSR datasheet, CD74ACT153NSR pinout, CD74ACT153NSR application, or CD74ACT153NSR equivalent, key selection criteria include its ACT-family speed-power balance, 125°C extended temperature rating, SOIC-compatible SOP-16 footprint, and compatibility with legacy 74ACT logic families in industrial control and instrumentation designs.

Technical Context

The CD74ACT153NSR integrates two independent 4:1 multiplexer sections sharing common select lines A and B, each with dedicated active-low strobe (G) inputs enabling independent enable/disable control. Its CMOS process delivers balanced tPLH/tPHL delays and SCR-latchup resistance.

It supports full binary decoding via internal inverters and drivers feeding AND-OR logic gates, accepts TTL-level inputs (VIH = 2 V min, VIL = 0.8 V max), and provides rail-to-rail output swing with guaranteed VOH ≥ 3.7 V and VOL ≤ 0.5 V under 24-mA load at VCC = 4.5 V.

Key Specifications

Pinout & Package

SOP-16 package (NS drawing), 10.4 mm × 5.3 mm body, 1.27 mm pitch, 2.00 mm max height, RoHS-compliant NIPDAU lead finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual 4:1 multiplexer applications.

Compared with SN74ACT153DR, CD74ACT153NSR offers identical functionality and layout compatibility, while 74VHC153M trades drive strength and temperature range for lower static power-making CD74ACT153NSR the preferred choice for high-reliability, high-drive, extended-temperature applications.

Availability

CD74ACT153NSR is available at Aetrix Electronics and suitable for industrial PLCs, avionics data acquisition, and automated test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CD74ACT153NSR 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 50 years of innovation in high-reliability logic families.

The CD74ACT153NSR belongs to TI's 74ACT advanced CMOS logic series, designed specifically for applications demanding TTL compatibility, high-speed performance, and robust operation in extreme environmental conditions.

FAQ

What is the maximum clock frequency supported by CD74ACT153NSR in a 4:1 multiplexing configuration?

The CD74ACT153NSR does not operate on a clock signal-it is combinational logic. Its usable data rate depends on propagation delay: with a worst-case tPD of 18 ns (C→Y), it supports reliable signal routing up to approximately 50 MHz in systems where setup/hold times are met. The CD74ACT153NSR's 4.5 ns minimum delay enables clean transitions in high-speed digital control paths without added latency.

Does CD74ACT153NSR require external pull-up or pull-down resistors on unused inputs?

Yes-per TI's SCBA004 application report, all unused inputs of CD74ACT153NSR must be tied to VCC or GND to prevent floating nodes that cause increased ICC, noise susceptibility, or erratic output behavior. Leaving inputs unconnected risks undefined logic states and elevated power consumption. This requirement applies to all select (A, B), strobe (1G, 2G), and data (C0–C3) inputs not actively used in the design.

Is CD74ACT153NSR pin-compatible with older 74LS153 or 74HC153 devices?

No-CD74ACT153NSR is not pin-compatible with 74LS153 (which uses different pin assignments for strobes and outputs) or 74HC153 (which places 2Y at pin 15 instead of pin 16). While the logic function and number of pins match, the CD74ACT153NSR pinout follows TI's ACT-family standard: 1G at pin 1, 2Y at pin 16. Direct replacement requires PCB layout revision unless using adapter footprints.

What is the thermal resistance (θJA) of the CD74ACT153NSR in its SOP-16 package?

The CD74ACT153NSR in SOP-16 (NS package) has a specified junction-to-ambient thermal resistance (θJA) of 73°C/W, measured per JESD 51-7. This value assumes standard JEDEC 2-layer board conditions. For sustained 24-mA output loading across all channels, derating is recommended above 85°C ambient to maintain junction temperature below 125°C, especially in enclosed or convection-limited enclosures.

Can CD74ACT153NSR operate reliably at 3.3 V supply voltage?

No-CD74ACT153NSR is specified only for 4.5 V to 5.5 V operation. At 3.3 V, VIH/VIL thresholds are violated (VIH min = 2.0 V, but noise margin collapses), output drive falls below specification, and timing parameters become invalid. For 3.3-V systems, consider TI's SN74LVC153 or 74AUP1G153 variants instead of CD74ACT153NSR.