Nexperia USA Inc. 74HC75DB,118

Overview

74HC75DB,118 from Nexperia is a quad bistable transparent latch IC with complementary Q/nQ outputs and dual active-HIGH enable inputs (LE12 for latches 1–2, LE34 for latches 3–4), operating across 2.0 V to 6.0 V supply, supporting industrial temperature range (−40 °C to +125 °C), and used in bus interface, data buffering, and address latching in microcontroller peripheral systems.

For engineers reviewing the 74HC75DB,118 datasheet, 74HC75DB,118 pinout, 74HC75DB,118 application, or 74HC75DB,118 equivalent, key selection considerations include transparent latch timing (e.g., 12 ns typical tpd at VCC = 4.5 V), dual-enable group control, CMOS input compatibility, SO16 package pin mapping, and −40 °C to +125 °C operation without derating.

Technical Context

The 74HC75DB,118 implements four independent D-type transparent latches grouped into two pairs, each controlled by a dedicated active-HIGH enable signal-LE12 governs latches 1 and 2, LE34 governs latches 3 and 4. Each latch provides true (Q) and complementary (nQ) outputs simultaneously.

Its transparent mode allows real-time nD-to-nQ propagation while LEnn is HIGH; on HIGH-to-LOW transition of LEnn, data present one setup time (tsu = 12 ns min at VCC = 4.5 V) before the edge is captured and held. Outputs remain stable during LEnn LOW, with no clock required-only level-sensitive enable control.

Key Specifications

Pinout & Package

74HC75DB,118 is packaged in SO16 (SOT109-1), a plastic small outline package with 16 leads and 3.9 mm body width. Pin 1 is index-marked; VCC (pin 5) and GND (pin 12) occupy center positions to minimize supply noise coupling.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad transparent latch applications.

Compared with 74HC75DB,118, the 74HC75D,653 offers identical performance in production-ready packaging, while SN74HC75N trades speed and density for through-hole serviceability - making the DB variant optimal for modern surface-mount industrial control designs.

Availability

74HC75DB,118 is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and medical device subsystems requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for 74HC75DB,118 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 discrete components with industry-leading reliability and quality.

The 74HC75 belongs to Nexperia's HC logic family, designed specifically for low-power, high-noise-immunity digital interfacing in industrial, consumer, and automotive-qualified applications where predictable timing and rail-to-rail swing are critical.

FAQ

What is the maximum clock rate supported by the 74HC75DB,118?

The 74HC75DB,118 does not use a clock; it is a level-sensitive transparent latch. Its effective data rate depends on enable pulse width (tW ≥ 14 ns min at VCC = 6.0 V) and propagation delay (tpd ≤ 22 ns max at VCC = 4.5 V). In practice, it supports reliable operation up to ~20 MHz in synchronous bus applications when paired with appropriate controller timing.

Can 74HC75DB,118 interface directly with 3.3 V microcontrollers while powered at 5 V?

Yes - its CMOS inputs tolerate VI up to VCC + 0.5 V, and input clamp diodes allow safe interfacing to 3.3 V signals when VCC = 5 V, provided series current-limiting resistors (≥1 kΩ) are used. Input thresholds scale with VCC, ensuring valid HIGH detection at 3.3 V (VIH = 3.15 V min at VCC = 4.5 V).

Does 74HC75DB,118 support hot insertion or live bus connection?

No - the device lacks hot-swap protection circuitry. While input clamp diodes help limit overvoltage stress, applying signals before VCC stabilization may cause latch-up or excessive ICC. Always power VCC and GND before applying input signals, and use series resistors (≥100 Ω) on all inputs/outputs in hot-plug scenarios.

How does the dual-enable architecture improve system timing flexibility?

The separate LE12 and LE34 inputs allow independent control of two latch pairs - enabling staggered data capture (e.g., latching address then data within one cycle), partial updates (e.g., modifying only upper nibble), or synchronization with different subsystem clocks. This eliminates need for external gating logic and reduces timing closure complexity in multi-bus architectures.