Nexperia USA Inc. 74HC595DB,112

Overview

74HC595DB,112 from Nexperia is an 8-bit serial-in/serial-or-parallel-out shift register with storage latch and 3-state outputs, used for serial-to-parallel data expansion in microcontroller I/O interfaces. It features separate shift (SHCP) and storage (STCP) clocks, asynchronous master reset (MR), output enable (OE), and operates from 2.0 V to 6.0 V across –40 °C to +125 °C. Typical applications include LED matrix drivers and GPIO expanders in industrial control panels.

For engineers reviewing the 74HC595DB,112 datasheet, 74HC595DB,112 pinout, 74HC595DB,112 application, or 74HC595DB,112 equivalent, key selection criteria include its 100 MHz typical shift-out frequency, 3-state parallel outputs enabling bus sharing, dual-clock architecture for precise timing control, and SO16 (SOT109-1) package compatibility with legacy PCB footprints.

Technical Context

The device implements two independent synchronous registers: an 8-stage shift register clocked by SHCP (LOW-to-HIGH edge) and an 8-bit storage register clocked by STCP (LOW-to-HIGH edge). Data propagates serially via DS input and Q7S output, supporting daisy-chaining without external logic.

Output states are controlled exclusively by OE (active LOW) and MR (asynchronous active LOW reset of shift register only); OE has no effect on internal register contents. Input clamp diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors.

Key Specifications

Pinout & Package

74HC595DB,112 uses the SO16 plastic small outline package (SOT109-1), 16-pin, 3.9 mm body width, with standard 1.27 mm lead pitch and gull-wing leads suitable for reflow soldering.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit serial-in/parallel-out shift register applications.

Compared with 74HCT595DB,112, the original offers superior high-speed performance and wider VCC flexibility, while SN74HC595PWR trades package size for thermal constraints-making 74HC595DB,112 optimal for cost-sensitive, thermally stable 5 V industrial designs requiring maximum timing headroom.

Availability

74HC595DB,112 is available at Aetrix Electronics and suitable for LED matrix drivers, microcontroller GPIO expansion, and industrial sensor interface applications requiring stable component supply and long-term obsolescence management.

Supply support for 74HC595DB,112 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 delivering high-performance, reliable logic, discrete, and MOSFET solutions with focus on efficiency, reliability, and miniaturization.

The 74HC595DB,112 belongs to Nexperia's industry-standard HC logic family, designed specifically for robust serial-to-parallel data conversion in automotive, industrial, and consumer electronics where timing precision and wide supply tolerance are critical.

FAQ

What is the difference between SHCP and STCP in the 74HC595DB,112?

SHCP (shift clock) controls data movement through the 8-bit shift register on each LOW-to-HIGH transition, while STCP (storage clock) transfers the current shift register contents into the output latch on its LOW-to-HIGH edge. This separation prevents output glitches during serial loading and enables precise timing of parallel output updates-essential for display drivers and synchronized control systems.

Can the 74HC595DB,112 drive LEDs directly without current-limiting resistors?

No. Although each Qn output can source or sink up to ±35 mA, direct LED connection without series resistors risks exceeding absolute maximum ratings due to forward voltage variation and thermal runaway. The datasheet specifies IO = ±6 mA for VOH/VOL compliance at VCC = 4.5 V-requiring external resistors to limit current to safe levels (e.g., 10 mA per LED at 5 V).

Is the MR (master reset) pin synchronous or asynchronous?

The MR pin is asynchronous and active LOW: asserting MR immediately clears only the shift register contents to zero, regardless of SHCP or STCP state. The storage register and parallel outputs remain unchanged, preserving displayed or latched data-enabling safe reset of incoming serial streams without disrupting active outputs.

Does the 74HC595DB,112 support daisy-chaining, and how is it implemented?

Yes. Daisy-chaining is implemented by connecting Q7S (serial output) of one device to DS (serial input) of the next. With SHCP and STCP shared across all devices, serial data propagates through the chain on each SHCP edge, and all devices simultaneously latch their respective 8-bit segments on a common STCP edge-enabling scalable N×8-bit output expansion with minimal MCU pin usage.