Nexperia USA Inc. 74HCT594D,112

Overview

74HCT594D,112 from Nexperia is an 8-bit serial-in/parallel-out shift register with independent shift and storage registers, TTL-compatible inputs (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5 V), 16-pin SO16 package, and operates from -40 °C to +125 °C. It enables serial-to-parallel data conversion in LED matrix drivers and remote control holding registers via cascaded Q7S output and parallel Q0–Q7 outputs.

For engineers reviewing the 74HCT594D,112 datasheet, 74HCT594D,112 pinout, 74HCT594D,112 application, or 74HCT594D,112 equivalent, key selection considerations include independent SHCP/STCP clocks for pipeline control, active-low SHR/STR reset pins, TTL-level input compatibility, and SO16 thermal performance up to 125 °C ambient.

Technical Context

This device implements a two-stage pipeline: an 8-bit shift register accepting serial data on SHCP rising edges, and a separate 8-bit storage register transferring data on STCP rising edges - enabling non-overlapping update of parallel outputs. Both registers feature dedicated asynchronous active-low reset pins (SHR, STR) and operate with fully static CMOS logic.

Input thresholds are TTL-compatible (VIH ≥ 2.0 V, VIL ≤ 0.8 V at VCC = 4.5–5.5 V), ensuring direct interfacing with legacy microcontrollers and logic families. Propagation delays are specified down to 18 ns (SHCP→Q7S) and 18 ns (STCP→Qn) at VCC = 4.5 V, CL = 50 pF, supporting clock rates up to 92 MHz (typical).

Key Specifications

Pinout & Package

74HCT594D,112 uses the SO16 plastic small outline package (SOT109-1), 16-lead, 3.9 mm body width, with gull-wing leads and standard JEDEC MS-012 outline.

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 74HC594D,112 and SN74LV595AQPWRQ1, the 74HCT594D,112 uniquely delivers TTL-compatible inputs with full register independence - critical for legacy system integration and glitch-free multi-stage buffering where shift and output update timing must be strictly decoupled.

Availability

74HCT594D,112 is available at Aetrix Electronics and suitable for LED display drivers, industrial I/O expanders, remote control holding registers, and test fixture pattern generators requiring stable component supply across extended temperature ranges.

Supply support for 74HCT594D,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 sustainability.

The 74HCT594 belongs to Nexperia's 74HCT logic family - engineered for seamless interoperability with TTL systems while leveraging CMOS power efficiency and noise immunity in industrial and automotive control applications.

FAQ

What is the difference between SHCP and STCP in the 74HCT594D,112?

SHCP (shift clock) controls data movement within the 8-bit shift register on each rising edge, while STCP (storage clock) transfers the entire 8-bit content from the shift register to the output storage register - and thus to Q0–Q7 - on its rising edge. This separation allows continuous serial loading without disrupting currently displayed/latched outputs.

Can the 74HCT594D,112 drive LEDs directly?

Yes - each Q0–Q7 output delivers ±6 mA at VCC = 4.5 V, sufficient to drive standard 5 mm LEDs with appropriate current-limiting resistors (e.g., ~330 Ω for 10 mA at 5 V). Q7S provides ±4 mA and is intended for cascading, not direct LED drive.

Is the 74HCT594D,112 pin-compatible with the 74HC594D,112?

Yes - both share identical SO16 (SOT109-1) pinout, function table, and DC characteristics. The only differences are input voltage thresholds (TTL vs. CMOS) and AC timing margins; 74HCT594D,112 accepts 2.0 V as VIH, whereas 74HC594D,112 requires ≥3.15 V at VCC = 4.5 V.

Does the 74HCT594D,112 require external pull-up or pull-down resistors on control pins?

No - all inputs (SHCP, STCP, SHR, STR, DS) have built-in clamp diodes and defined logic thresholds. However, floating inputs must be avoided: unused control pins should be tied to VCC (for active-low pins like SHR/STR) or GND (for DS if unused) to prevent metastability or unintended toggling.