Nexperia USA Inc. 74HC259PW,118

Overview

74HC259PW,118 from Nexperia is an 8-bit addressable latch with four operational modes: addressable latch, memory, 3-to-8 demultiplexing, and reset. It operates from 2.0 V to 6.0 V, supports -40 °C to +125 °C ambient range, and features TTL-compatible inputs (74HCT variant) or CMOS-level inputs (74HC variant). Its 16-pin TSSOP package enables compact board layout in digital control logic for industrial I/O expansion.

For engineers reviewing the 74HC259PW,118 datasheet, 74HC259PW,118 pinout, 74HC259PW,118 application, or 74HC259PW,118 equivalent, this device serves as a serial-to-parallel interface with random-access latch control, active-HIGH 3-to-8 decoding, and synchronous reset - critical for microcontroller peripheral interfacing, LED matrix addressing, and programmable logic state retention.

Technical Context

The 74HC259PW,118 implements a dual-function architecture: an 8-bit register array with individual output enable via A0–A2 address lines, and a combinational 3-to-8 decoder whose outputs mirror the D input when enabled. Mode selection is determined solely by LE (latch enable, active LOW) and MR (master reset, active LOW) states per Table 4.

Its input clamping diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors. Output drive capability is ±25 mA per pin, with VOH ≥ 3.98 V and VOL ≤ 0.26 V at VCC = 4.5 V and IO = ±4.0 mA, ensuring robust noise margin in mixed-voltage systems.

Key Specifications

Pinout & Package

TSSOP16 plastic thin shrink small outline package (SOT403-1); 16 leads; body width 4.4 mm; 0.65 mm pitch; exposed pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit addressable latch applications.

Compared with 74HCT259PW,118, the 74HC259PW,118 offers superior noise immunity in mixed-signal boards due to higher VIH (3.15 V min at VCC = 4.5 V), while SN74HC259PWR provides identical functionality with alternate supply-chain assurance - neither offers enhanced speed or lower power over the Nexperia part.

Availability

74HC259PW,118 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, LED matrix column driving, programmable logic state retention, and test fixture signal routing requiring stable component supply across extended temperature ranges.

Supply support for 74HC259PW,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 leading semiconductor manufacturer specializing in high-performance logic, analog, and discrete components, with focus on reliability, efficiency, and scalability for industrial and automotive markets.

The 74HC259 belongs to Nexperia's HC/HCT logic family designed for low-power, high-noise-immunity digital interfacing in resource-constrained embedded systems - emphasizing pin compatibility, wide supply tolerance, and extended temperature operation.

FAQ

What are the key differences between 74HC259PW and 74HCT259PW?

The 74HC259PW uses CMOS-level input thresholds (VIH ≥ 3.15 V at VCC = 4.5 V), while the 74HCT259PW uses TTL-compatible thresholds (VIH ≥ 2.0 V). Both share identical pinout, timing, and output drive. The HC version offers better noise margin in 5 V systems; the HCT version ensures compatibility with older TTL outputs that cannot reach 3.15 V.

Can the 74HC259PW,118 operate reliably at 2.0 V supply?

Yes - it is fully specified from 2.0 V to 6.0 V. At VCC = 2.0 V, propagation delay increases to 58 ns (typ), VIH drops to 1.5 V min, and output drive reduces to ±4.0 mA (min). All functions remain operational, making it suitable for ultra-low-voltage battery-powered logic interfaces.

How does the master reset (MR) interact with latch enable (LE) in reset mode?

In reset mode (MR = LOW), all Qn outputs are forced LOW regardless of LE state, address inputs, or D input. This is asynchronous and overrides all other modes. When MR returns HIGH, outputs retain their pre-reset state only if LE was HIGH (memory mode); otherwise, they follow current D and address values on next LE transition.

Is the TSSOP16 package (SOT403-1) thermally adequate for continuous 5 V operation?

Yes - the SOT403-1 package has a total power dissipation rating of 500 mW at Tamb ≤ 91 °C, derating linearly by 8.5 mW/K above that. At 5 V and typical ICC < 80 μA, static power is < 0.4 mW; even with all outputs sourcing 4 mA, total power remains well below thermal limits in standard PCB layouts.