Texas Instruments SN74HC153NSR

Overview

SN74HC153NSR from Texas Instruments is a dual 4-line to 1-line data selector/multiplexer in SOP-16 package, operating from 2 V to 6 V, with typical propagation delay of 9 ns at 4.5 V and ±6-mA output drive capability. It implements full binary decoding with independent strobe (G) inputs per channel and supports parallel-to-serial conversion in digital logic systems.

For engineers reviewing the SN74HC153NSR datasheet, SN74HC153NSR pinout, SN74HC153NSR application, or SN74HC153NSR equivalent, this page delivers verified electrical specs, functional mode mapping, package dimensions, real-world use cases, and two validated alternative parts for logic multiplexing in industrial control, test equipment, and embedded interface design.

Technical Context

The SN74HC153NSR integrates two independent 4:1 multiplexer channels sharing common address inputs (A, B) but featuring separate enable (G1, G2) terminals - enabling selective channel activation or cascading. Each channel decodes A/B to select one of four data inputs (C0–C3) onto its output (Y1/Y2).

Its CMOS HC-family architecture ensures low static current (≤80 μA), high noise immunity (VIH/VIL thresholds defined across VCC = 2–6 V), and compatibility with LSTTL loads. Strobe-driven output disable (high-G → low-Y) supports hierarchical signal routing without external gating.

Key Specifications

Pinout & Package

SOP-16 (NS) package: 6.20 mm × 5.30 mm body, 1.27 mm pitch, 2.00 mm max height, gull-wing leads, RoHS-compliant NiPdAu 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 SN74HC153NSR, SN74HCT153N offers stronger TTL input compatibility at the cost of higher quiescent current, while 74LCX153MTCX delivers faster switching and lower voltage operation but lacks 5 V supply support - selection depends on system voltage architecture and legacy interface requirements.

Availability

SN74HC153NSR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automated test equipment signal routing, and embedded microcontroller peripheral sharing requiring stable component supply across extended production lifecycles.

Supply support for SN74HC153NSR 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 over 90 years of innovation in industrial, automotive, and communications markets.

The SN74HC153NSR belongs to TI's 74HC logic family - designed for robust, low-power, wide-supply-voltage digital signal routing in cost-sensitive industrial and educational applications.

FAQ

What is the maximum clock frequency supported by SN74HC153NSR?

The SN74HC153NSR does not operate on a clock; it is a combinational logic device whose switching speed is governed by propagation delay. With typical tpd = 9 ns at VCC = 4.5 V and CL = 50 pF, it supports reliable data selection in systems with signal edges repeating at up to ~55 MHz (1/2×tpd margin), assuming clean input transitions and proper load management. The SN74HC153NSR datasheet specifies no maximum clock rate because it has no internal clock or latch.

Can SN74HC153NSR be used to cascade more than two 4:1 multiplexers?

Yes - the SN74HC153NSR supports cascading via its strobe (G) inputs. For example, outputs Y1/Y2 can feed inputs of a second SN74HC153NSR, with its A/B lines selecting between them; the first-stage G inputs control which channel passes data forward. This enables 8:1 or larger multiplexing without external logic. The SN74HC153NSR functional table explicitly defines G-driven output disable, making it suitable for hierarchical routing trees.

Does SN74HC153NSR require pull-up or pull-down resistors on unused inputs?

Yes - all unused inputs of the SN74HC153NSR must be held at a valid logic level (VCC or GND) to prevent floating nodes that cause increased ICC, oscillation, or undefined outputs. TI's datasheet Section 5.2 explicitly states this requirement and references application report SCBA004. Leaving inputs unconnected violates recommended operating conditions and risks erratic behavior - the SN74HC153NSR has no internal weak pull-ups or pull-downs.

Is SN74HC153NSR compatible with 3.3 V microcontrollers?

Yes - the SN74HC153NSR operates reliably from 2 V to 6 V, and its input thresholds scale with VCC. At VCC = 3.3 V, VIH ≈ 2.3 V and VIL ≈ 1.0 V (per interpolation from datasheet tables), making it fully compatible with standard 3.3 V CMOS logic outputs. Its outputs swing rail-to-rail, providing clean 3.3 V logic levels to downstream devices - no level translation needed when used with SN74HC153NSR in 3.3 V systems.

What is the thermal resistance (θJA) of the SN74HC153NSR SOP-16 package?

The SN74HC153NSR in SOP-16 (NS) package has a junction-to-ambient thermal resistance (θJA) of 64 °C/W, as specified in Section 5.3 of the TI datasheet. This value assumes standard JEDEC 2-layer board conditions (1-inch² copper pad, 2 oz Cu). For sustained operation near maximum ambient (85 °C), power dissipation should remain below ~150 mW to keep junction temperature under 150 °C - well within the SN74HC153NSR's typical 0.5–2 mW dynamic power range at moderate frequencies.