Nexperia USA Inc. 74HC253BQX

Overview

74HC253BQX from Nexperia is a dual 4-input CMOS multiplexer with independent 3-state outputs, shared S0/S1 select lines, and separate active-low output enables (1OE, 2OE). It operates from 2.0 V to 6.0 V, delivers propagation delay as low as 16 ns at VCC = 6.0 V, supports -40 °C to +125 °C ambient range, and features clamp diodes for overvoltage-tolerant input interfacing - used in digital bus routing and data path selection within industrial control logic.

For engineers reviewing the 74HC253BQX datasheet, 74HC253BQX pinout, 74HC253BQX application, or 74HC253BQX equivalent, key selection criteria include its dual-channel 4:1 multiplexing capability, 3-state bus-compatible outputs, DHVQFN16 thermal-enhanced package, TTL/CMOS input level compatibility (HC variant), and guaranteed operation across extended temperature range without derating below 106 °C.

Technical Context

The 74HC253BQX implements two independent 4:1 multiplexers sharing common select inputs (S0, S1) but featuring separate output enable controls (1OE, 2OE), enabling selective activation of each output channel. Its non-inverting data path preserves signal polarity, and the 3-state outputs support direct connection to bidirectional system buses without external isolation.

Input clamp diodes allow safe interfacing with signals exceeding VCC when current-limiting resistors are used. The device complies with JEDEC JESD7A (2.0–6.0 V) and JESD8C (2.7–3.6 V), meets HBM ESD >2000 V and CDM >1000 V, and exhibits latch-up immunity exceeding 100 mA per JESD78 Class II Level B.

Key Specifications

Pinout & Package

DHVQFN16 (SOT763-1) package: 2.5 × 3.5 × 0.85 mm body, 16-terminal no-lead quad flat design with exposed thermal pad (non-soldered or floating per datasheet guidance). Optimized for thermal performance and board space efficiency in compact industrial modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC253PW and SN74HC253DR, the 74HC253BQX offers superior thermal management in minimal area, tighter timing consistency across temperature, and native support for extended industrial ambient conditions - making it optimal for compact, high-reliability embedded systems.

Availability

74HC253BQX is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, automated test equipment, and medical data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HC253BQX 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 technologies, delivering high-performance logic, analog, and MOSFET solutions for industrial, automotive, and consumer markets.

The 74HC253BQX belongs to Nexperia's 74HC logic family - engineered for low-power, high-noise-immunity digital signal routing in space- and thermally constrained embedded systems operating across harsh environmental conditions.

FAQ

What is the maximum clock/data rate supported by the 74HC253BQX?

The 74HC253BQX does not operate on a clock; it is a combinational multiplexer. Its maximum usable data rate is determined by propagation delay (16 ns max at VCC = 6.0 V) and transition time (4 ns min). With CL = 15 pF, it reliably handles digital signals up to ~20 MHz in typical routing applications, assuming clean edges and proper termination.

Can the 74HC253BQX interface directly with 5 V TTL logic?

No - the 74HC253BQX uses CMOS input thresholds (VIH ≥ 0.7×VCC), so at VCC = 5 V, VIH ≥ 3.5 V. Standard TTL outputs (VOH ≈ 2.4–3.5 V) may not consistently meet this, risking unreliable HIGH detection. For guaranteed TTL compatibility, use the pin-compatible 74HCT253BQX variant, which specifies VIH = 2.0 V min at VCC = 4.5–5.5 V.

Is the exposed thermal pad on the DHVQFN16 package required to be soldered?

No - per Nexperia's datasheet (SOT763-1, note 1), the exposed pad has no electrical or mechanical requirement to be soldered. If soldered, it must remain electrically floating or be connected to VCC; grounding the pad violates the specified thermal and electrical design intent and may impair reliability.

How does the 74HC253BQX handle input voltages exceeding VCC?

It safely tolerates inputs up to VCC + 0.5 V due to integrated input clamp diodes. To prevent excessive current, external series resistors must limit diode conduction to ≤ ±20 mA (per Absolute Maximum Ratings). This enables direct interfacing with overvoltage sources like 12 V sensor outputs when properly current-limited.