Nexperia USA Inc. 74HCT253D,653

Overview

74HCT253D,653 from Nexperia is a dual 4-input multiplexer IC with TTL-compatible inputs, 3-state outputs, shared S0/S1 select lines, independent 1OE/2OE enable controls, and operation across 4.5 V to 5.5 V supply. It routes one of four binary inputs per channel to its output under select control and enters high-impedance state when enabled low-used in bus-oriented data routing and digital logic consolidation.

For engineers reviewing the 74HCT253D,653 datasheet, 74HCT253D,653 pinout, 74HCT253D,653 application, or 74HCT253D,653 equivalent, key selection criteria include TTL-level input compatibility, dual-channel 3-state bus interfacing, propagation delay ≤48 ns at 4.5 V, -40 °C to +125 °C industrial temperature range, and SO16 (SOT109-1) package mechanical compatibility.

Technical Context

The device implements two independent 4:1 multiplexers sharing S0 and S1 select inputs but featuring separate 1OE and 2OE active-low enables-enabling asynchronous channel gating. Each multiplexer passes one of four inputs (1I0–1I3 or 2I0–2I3) to its output (1Y or 2Y) based on binary S0/S1 encoding.

Its TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V at VCC = 4.5–5.5 V) ensure direct interfacing with legacy 5 V logic families, while 3-state outputs support bidirectional bus loading without external isolation. Propagation delays are characterized up to 125 °C with tpd ≤ 57 ns (max) and transition times ≤ 18 ns (max) under CL = 50 pF.

Key Specifications

Pinout & Package

74HCT253D,653 uses the SO16 plastic small outline package (SOT109-1), 16-pin, 3.9 mm body width, with gull-wing leads and pin 1 index marker.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HCT153DR and 74VHC253M, the 74HCT253D,653 offers tighter propagation delay (≤48 ns vs. ≤60 ns), lower quiescent current at high temperature (160 μA vs. 200 μA), and guaranteed TTL input compatibility-making it optimal for timing-critical, legacy-logic-integrated industrial control designs.

Availability

74HCT253D,653 is available at Aetrix Electronics and suitable for industrial automation, test equipment, and embedded I/O expansion requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HCT253D,653 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

Nexperia is a global semiconductor expert focused on essential efficiency-enhancing components, delivering high-volume, high-reliability logic, discrete, and MOSFET solutions for industrial, automotive, and computing markets.

The 74HCT series targets robust, drop-in replacements for legacy TTL logic in industrial and consumer systems-designed specifically for seamless integration with 5 V microcontrollers, FPGAs, and peripheral interfaces while maintaining low power and high noise immunity.

FAQ

Is 74HCT253D,653 pin-compatible with 74HC253D?

Yes-both share identical SO16 (SOT109-1) pinout, functional diagram, and terminal assignments. The only difference is input threshold specification: 74HCT253D accepts TTL-level inputs (VIH ≥ 2.0 V), while 74HC253D requires CMOS-level inputs (VIH ≥ 3.15 V at VCC = 4.5 V). Electrical substitution is safe in 5 V TTL systems but may fail with weak-drive CMOS sources.

Can 74HCT253D,653 operate at 3.3 V supply?

No-it is not specified for 3.3 V operation. The 74HCT253 family requires VCC between 4.5 V and 5.5 V per datasheet Table 5. At 3.3 V, input thresholds fall outside guaranteed range (VIH min = 2.0 V, but VOH/VOL degrade significantly), and propagation delay increases unpredictably. Use 74VHC253 or 74LVC253 for 3.3 V systems.

What is the maximum capacitive load supported on 1Y/2Y outputs?

The device is characterized up to 50 pF load capacitance (per Table 9 test conditions), with tpd and tt specifications guaranteed under that condition. Driving >50 pF will increase propagation delay and transition time linearly-e.g., doubling CL to 100 pF increases tpd by ~25% (based on CPD = 55 pF per mux). For >100 pF, add series termination or buffer stage.

Does 74HCT253D,653 support hot insertion into a live bus?

No-hot insertion is not supported. Although inputs feature clamp diodes, the device lacks bus-hold or power-up 3-state logic. Applying VCC after signal inputs may forward-bias input clamps, causing excessive current. Always power VCC before applying input signals, and use external series resistors if live insertion is required.