Nexperia USA Inc. 74HC595D,112

Overview

74HC595D,112 from Nexperia is an 8-bit serial-in/serial-or-parallel-out shift register with separate shift and storage registers, 3-state outputs, asynchronous master reset (MR), and dual clocks (SHCP, STCP). It operates from 2.0 V to 6.0 V, supports up to 100 MHz typical shift-out frequency, and functions as a serial-to-parallel data converter in microcontroller I/O expansion systems.

For engineers reviewing the 74HC595D,112 datasheet, 74HC595D,112 pinout, 74HC595D,112 application, or 74HC595D,112 equivalent, this device is selected for reliable cascaded LED driver control, GPIO extension in space-constrained industrial controllers, and buffered output latching where timing isolation between shift and storage stages is required.

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 latch clocked by STCP (LOW-to-HIGH edge), enabling precise staging of serial data before parallel output release. The MR input asynchronously clears only the shift register, leaving the storage register unaffected until next STCP pulse.

Outputs Q0–Q7 are 3-state controlled by OE (active LOW); Q7S provides cascading capability. Input clamp diodes allow safe interfacing with voltages exceeding VCC when used with current-limiting resistors - a key feature for mixed-voltage system integration.

Key Specifications

Pinout & Package

74HC595D,112 uses the SO16 (SOT109-1) package: plastic small outline, 16 leads, 3.9 mm body width, surface-mount compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC595D,112, the 74HCT595D,112 offers guaranteed TTL input thresholds at the cost of slightly higher ICC, while SN74HC595PWR delivers identical functionality in a smaller footprint-requiring trade-offs between legacy compatibility, board area, and manufacturing capability.

Availability

74HC595D,112 is available at Aetrix Electronics and suitable for LED matrix drivers, microcontroller GPIO expanders, industrial sensor interfaces, and automotive dashboard indicators requiring stable component supply across extended temperature ranges.

Supply support for 74HC595D,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 logic, analog, and MOSFET solutions with emphasis on reliability, efficiency, and manufacturability for industrial and automotive markets.

The 74HC595 belongs to Nexperia's standard logic portfolio, designed specifically for robust serial-to-parallel conversion in resource-constrained embedded systems where timing precision and thermal resilience are critical.

FAQ

Can 74HC595D,112 operate reliably at 3.3 V supply?

Yes - the 74HC595D,112 is fully specified from 2.0 V to 6.0 V. At VCC = 3.3 V, it delivers VIH = 2.1 V (min), VOL = 0.33 V (max at 6 mA), and tpd = 24 ns (max), meeting standard 3.3 V LVTTL interface requirements without level translation.

What happens to Q0–Q7 outputs during MR assertion?

No change occurs to Q0–Q7 outputs during MR assertion because MR resets only the shift register. The storage register retains its prior state, and outputs remain active (if OE = LOW) or high-impedance (if OE = HIGH) - preserving displayed or driven values during serial reload.

Is cascading multiple 74HC595D,112 units supported in hardware?

Yes - Q7S provides dedicated serial output for daisy-chaining. Connect Q7S of one device to DS of the next, synchronize SHCP and STCP across all units, and use common OE/MR. Propagation delays accumulate linearly, limiting max cascade depth to ~12 units at 10 MHz operation.

Does OE affect internal register states when toggled?

No - OE controls only the 3-state output drivers. Internal shift and storage registers continue operating normally regardless of OE state. This allows continuous serial loading and latching while outputs are disabled, enabling glitch-free output updates.