Nexperia USA Inc. 74HC259PW-Q100,118

Overview

74HC259PW-Q100 from Nexperia is an automotive-qualified 8-bit addressable latch with CMOS-level inputs, operating from 2.0 V to 6.0 V across –40 °C to +125 °C. It supports four distinct modes-addressable latch, memory, 3-to-8 demultiplexing, and reset-and provides individual Q0–Q7 outputs with active-low LE and MR controls. It is used in automotive body control modules for selective LED driver enablement and I/O expansion.

For engineers reviewing the 74HC259PW-Q100 datasheet, 74HC259PW-Q100 pinout, 74HC259PW-Q100 application, or 74HC259PW-Q100 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, TSSOP16 package compatibility with AOI inspection, dual-mode functionality (latch + decoder), and guaranteed operation at 125 °C ambient.

Technical Context

The device implements a synchronous addressable storage architecture where A0–A2 select one of eight latches to update on the rising edge of LE, while non-selected latches retain state. Its functional diagram integrates a 3-to-8 decoder core with parallel latch storage, enabling both serial-to-parallel data routing and discrete output control without external logic.

Mode selection is determined solely by the logic levels of LE and MR: LE = LOW + MR = HIGH enables addressable latch mode; LE = HIGH + MR = HIGH activates memory mode; LE = LOW + MR = LOW enables demultiplexer mode; LE = HIGH + MR = LOW forces all outputs LOW. Input clamp diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors.

Key Specifications

Pinout & Package

TSSOP16 package (SOT403-1), 4.4 mm body width, 0.65 mm lead pitch, side-wettable flanks for automated optical inspection (AOI) of solder joints.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HCT259PW-Q100, the original part offers superior noise immunity in high-voltage automotive environments due to higher VIH thresholds; versus SN74LV259APWR, it provides guaranteed operation at 125 °C and AEC-Q100 compliance required for OEM production.

Availability

74HC259PW-Q100 is available at Aetrix Electronics and suitable for automotive body electronics, instrument cluster subsystems, and diagnostic interface modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HC259PW-Q100 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, high-reliability logic, analog, and discrete components for automotive, industrial, and computing markets.

The 74HC-Q100 product line delivers AEC-Q100 qualified logic devices engineered specifically for automotive subsystems demanding extended temperature operation, robust ESD performance, and long-term supply stability.

FAQ

What is the function of the MR (Master Reset) pin?

The MR pin is an active-low asynchronous reset that forces all eight Q outputs LOW regardless of LE, D, or address inputs. It overrides all operational modes and maintains outputs in reset state as long as MR remains LOW. This enables fail-safe shutdown in safety-critical automotive functions such as lighting or actuator control.

Can the 74HC259PW-Q100 operate at 3.3 V supply?

Yes - the device is fully specified from 2.0 V to 6.0 V, including 3.3 V nominal operation. At VCC = 3.3 V, VIH is guaranteed ≥2.31 V and VOL ≤0.26 V at 4 mA load, ensuring reliable interfacing with 3.3 V microcontrollers and peripherals without level translation.

How does the addressable latch mode differ from demultiplexer mode?

In addressable latch mode (LE = LOW, MR = HIGH), only the addressed Qn follows D while others retain prior state. In demultiplexer mode (LE = LOW, MR = LOW), the addressed Qn follows D and all unaddressed outputs are forced LOW - providing true 1-of-8 active-HIGH decoding behavior with no state retention.

Is the TSSOP16 package suitable for reflow soldering in automotive PCB assembly?

Yes - the SOT403-1 package is qualified for standard lead-free reflow profiles (J-STD-020). Its side-wettable flanks support automated optical inspection of solder fillets, and thermal characteristics (Ptot = 500 mW, derating 8.5 mW/K above 91 °C) ensure reliability in automotive under-hood thermal environments.