Nexperia USA Inc. 74HCT253DB,112

Overview

74HCT253DB,112 from Nexperia is a dual 4-input 3-state multiplexer IC with TTL-compatible inputs, operating from 4.5 V to 5.5 V, featuring independent output enables (1OE, 2OE), shared select lines (S0, S1), and non-inverting data paths - used in digital bus routing, data selection, and address decoding in industrial control logic.

For engineers reviewing the 74HCT253DB,112 datasheet, 74HCT253DB,112 pinout, 74HCT253DB,112 application, or 74HCT253DB,112 equivalent, key selection criteria include its 3-state output drive capability, -40 °C to +125 °C temperature range, 16-pin SSOP package, propagation delay of 17 ns (VCC = 5.0 V, CL = 15 pF), and TTL-level input compatibility.

Technical Context

The 74HCT253DB,112 implements two independent 4:1 multiplexers sharing S0/S1 select inputs but with separate output enable controls (1OE, 2OE), enabling selective bus isolation. Each channel routes one of four binary inputs (1I0–1I3 or 2I0–2I3) to its respective output (1Y or 2Y) based on 2-bit binary select code.

Its 3-state outputs support direct connection to shared data buses without external buffering; a HIGH on either nOE forces the corresponding output into high-impedance OFF-state. Input clamp diodes allow safe interfacing with voltages exceeding VCC when current-limiting resistors are used.

Key Specifications

Pinout & Package

74HCT253DB,112 is housed in a 16-pin SSOP (Shrink Small Outline Package) per SOT338-1, with 0.65 mm lead pitch, body width 4.4 mm, and exposed thermal pad (non-soldered by default). Pin 1 marked via index notch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HCT253D,118 and 74HCT253PW,118, the 74HCT253DB,112 offers identical logic function and electrical specs but delivers the smallest PCB footprint among the three due to its SSOP geometry - making it optimal for miniaturized industrial controllers where board area is premium.

Availability

74HCT253DB,112 is available at Aetrix Electronics and suitable for industrial PLCs, embedded microcontroller peripherals, automated test equipment, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HCT253DB,112 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 high-volume, high-reliability logic, analog, and MOSFET solutions for industrial, automotive, and computing markets.

The 74HCT253 belongs to Nexperia's industry-standard 74HCT logic family - designed specifically for TTL-to-CMOS interfacing in noise-immune, wide-temperature industrial control systems.

FAQ

What is the maximum clock frequency supported by the 74HCT253DB,112?

The 74HCT253DB,112 does not operate on a clock; it is a combinational logic device. Its usable data rate depends on propagation delay (17 ns typical at 5 V) and system setup/hold timing. With 17 ns t_pd, it reliably supports signal routing in digital systems with cycle times ≥ 34 ns - equivalent to ~29 MHz maximum toggle rate under ideal conditions.

Can 74HCT253DB,112 drive a 50 pF capacitive load without degradation?

Yes - the datasheet specifies dynamic characteristics (tpd, tt) tested at CL = 50 pF. Propagation delay increases to 57 ns max at VCC = 4.5 V and CL = 50 pF, and transition time rises to 18 ns max. Output drive remains within spec (VOH/VOL maintained at ±6 mA), confirming robust operation under this load.

Is the SSOP package of 74HCT253DB,112 RoHS-compliant and lead-free?

Yes - Nexperia confirms the 74HCT253DB,112 meets RoHS Directive 2011/65/EU and is manufactured with lead-free terminations (Pb-free, SnAgCu solderable finish). The SOT338-1 package uses halogen-free molding compound and complies with JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) for unlimited floor life at ≤30 °C/60% RH.

How does the 74HCT253DB,112 differ from the 74HC253 variant?

The 74HCT253DB,112 uses TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V), ensuring seamless integration with legacy 5 V TTL outputs. In contrast, the 74HC253 requires CMOS-level inputs (VIH ≥ 3.15 V at VCC = 4.5 V), making it unsuitable for direct connection to standard TTL sources without level shifting.