Nexperia USA Inc. 74HCT595PW-Q100,11

Overview

74HCT595PW-Q100 from Nexperia is an automotive-grade 8-bit serial-in, serial-or-parallel-out shift register with storage latch and 3-state outputs, operating from -40 °C to +125 °C. It features separate shift (SHCP) and storage (STCP) clocks, asynchronous master reset (MR), and TTL-compatible inputs. Used in automotive body control modules for LED matrix expansion and sensor data aggregation where cascaded I/O extension is required.

For engineers reviewing the 74HCT595PW-Q100 datasheet, 74HCT595PW-Q100 pinout, 74HCT595PW-Q100 application, or 74HCT595PW-Q100 equivalent, this device supports high-speed serial-to-parallel conversion (up to 52 MHz at VCC = 5.5 V), precise timing control via dual-clock architecture, and robust output enable (OE) management for bus sharing in multi-device systems.

Technical Context

The device implements a two-stage pipeline: an 8-bit shift register accepting serial data on SHCP rising edges, and an independent 8-bit storage register loaded on STCP rising edges. This separation enables continuous data shifting while holding stable parallel outputs - critical for glitch-free display or actuator control.

Its TTL-level input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V) ensure compatibility with legacy microcontroller GPIOs, while 3-state outputs (enabled by active-low OE) support shared bus architectures without external logic. The MR input asynchronously clears only the shift register, preserving storage register contents until next STCP.

Key Specifications

Pinout & Package

TSSOP16 package (SOT403-1): 4.4 mm body width, 0.65 mm lead pitch, side-wettable flanks for AOI-compatible solder joint inspection.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit shift register with storage latch applications.

Compared with SN74HCT595QPWRQ1, the 74HCT595PW-Q100 offers identical functional behavior and automotive qualification but uses Nexperia's optimized SOT403-1 package with side-wettable flanks for enhanced AOI capability; versus 74HC595PW-Q100, it provides guaranteed TTL-level input compatibility essential for mixed-voltage automotive designs.

Availability

74HCT595PW-Q100 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor hubs, and infotainment backlight control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HCT595PW-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 global semiconductor expert focused on essential efficiency technologies, delivering high-performance logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.

This device belongs to Nexperia's automotive-qualified logic portfolio, engineered specifically for robust serial interface expansion in harsh environments where reliability, AEC-Q100 compliance, and precise timing control are mandatory.

FAQ

What is the maximum recommended clock frequency for reliable operation?

The 74HCT595PW-Q100 supports up to 52 MHz for both SHCP and STCP inputs at VCC = 5.5 V and TA = 25 °C. At full automotive range (-40 °C to +125 °C), the guaranteed maximum is 20 MHz per clock, verified by propagation delay limits in Table 7 of the datasheet. Exceeding this may cause setup/hold violations in cascaded configurations.

Can SHCP and STCP be tied together in a single-clock design?

Yes - connecting SHCP and STCP enables single-clock operation, but the shift register will always be one clock pulse ahead of the storage register. This configuration is valid only when output updates can tolerate one-cycle latency; for glitch-free operation, separate clocks are strongly recommended per Figure 1 and functional description.

How does the MR (master reset) pin affect the storage register?

The MR pin resets only the shift register - not the storage register. As stated in Section 7 and Table 3, a LOW on MR clears shift register stages but leaves Q0–Q7 outputs unchanged until the next STCP rising edge. This allows safe re-initialization of serial data flow without disrupting currently displayed or actuated states.

Is external pull-up or pull-down required on OE or MR pins?

No - OE and MR have internal weak pull-downs (150–735 μA typical, per Table 6), ensuring defined LOW state during power-up or floating conditions. However, for deterministic startup behavior in noisy automotive environments, a 10 kΩ external pull-down on MR and pull-up on OE is recommended to guarantee known initial states before firmware initialization.