Nexperia USA Inc. 74LVC594AD,118

Overview

74LVC594AD from Nexperia is an 8-bit serial-in/parallel-out shift register with separate shift and storage registers, dual asynchronous reset (SHR/STR), Schmitt-trigger inputs, and IOFF partial power-down support. It operates from 1.2 V to 3.6 V, accepts 5.5 V-tolerant inputs, and delivers parallel outputs (Q0–Q7) and serial output (Q7S) for cascading. Used in LED matrix drivers and remote control holding registers where level translation between 3.3 V and 5 V domains is required.

For engineers reviewing the 74LVC594AD datasheet, 74LVC594AD pinout, 74LVC594AD application, or 74LVC594AD equivalent, this device supports precise timing-critical serial-to-parallel conversion, offers guaranteed cascading under matched VCC/temperature conditions, and enables robust operation in mixed-voltage industrial control interfaces with its overvoltage-tolerant inputs and IOFF protection.

Technical Context

The 74LVC594AD 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), enabling pipelined data transfer. Its dual active-low reset pins (SHR, STR) clear respective registers without affecting the other.

Schmitt-trigger inputs ensure noise immunity with slow-rising signals; IOFF circuitry disables outputs during power-down to prevent backflow current. The device complies with JEDEC standards JESD8-7A, JESD8-5A, and JESD8-C/JESD36 across its full 1.2 V–3.6 V supply range and is rated for -40 °C to +125 °C operation.

Key Specifications

Pinout & Package

74LVC594AD is housed in a 16-pin SO16 plastic small outline package (SOT109-1), 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 SN74LV8154N and 74HC595PW, the 74LVC594AD uniquely combines dual-clock pipelining, 5.5 V-tolerant inputs, IOFF protection, and extended temperature qualification-making it the only option for reliable, scalable, mixed-voltage industrial and automotive serial-to-parallel conversion.

Availability

74LVC594AD is available at Aetrix Electronics and suitable for LED display drivers, industrial I/O expanders, remote control holding registers, and automotive body control modules requiring stable component supply across extended temperature ranges.

Supply support for 74LVC594AD 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 optimized for efficiency, reliability, and miniaturization in industrial, automotive, and consumer applications.

The 74LVC594A belongs to Nexperia's LVC logic family, designed specifically for low-voltage, mixed-signal interfacing with emphasis on voltage translation, noise immunity, and power-down safety in harsh operating environments.

FAQ

Can 74LVC594AD operate with a 1.2 V supply and still meet timing specifications?

Yes. The device is fully characterized down to 1.2 V, with propagation delays specified at 17.5 ns (typical) and maximum clock frequency of 80 MHz at that voltage. All static and dynamic parameters-including VIH/VIL thresholds and IOFF leakage-are guaranteed across the full 1.2 V–3.6 V range per JEDEC JESD8-7A compliance.

What happens if SHCP and STCP are tied together?

When SHCP and STCP are connected, the shift register advances one bit per clock cycle, and the storage register captures the prior state on the same edge-resulting in the shift register always being one clock ahead of the output. This configuration is valid and commonly used for simple serial-to-parallel conversion without pipelining.

Is the GND pad on the SO16 package (SOT109-1) electrically connected to internal ground?

Yes. Pin 8 is the sole functional GND terminal in the SO16 package. The exposed pad referenced in QFN variants (e.g., SOT763-1) does not exist in SOT109-1; no thermal pad or secondary ground connection is present-only the 16 perimeter leads are electrically active.

How does the IOFF feature behave during power sequencing?

IOFF activates automatically when V_CC drops below ~0.8 V, forcing all outputs into high-impedance regardless of input states. This prevents reverse current flow from powered downstream circuits into the unpowered 74LVC594AD, satisfying IEC 61000-4-2 and automotive power-sequence robustness requirements.