Nexperia USA Inc. 74AHC595PW,112

Overview

74AHC595PW,112 from Nexperia is an 8-bit serial-in/parallel-out shift register with storage latch and 3-state outputs, used for serial-to-parallel data expansion in microcontroller I/O-constrained systems. It features separate shift clock (SHCP) and storage clock (STCP), asynchronous master reset (MR), and output enable (OE) control. Operates from 2.0 V to 5.5 V at -40 °C to +125 °C in TSSOP16 package.

For engineers reviewing the 74AHC595PW,112 datasheet, 74AHC595PW,112 pinout, 74AHC595PW,112 application, or 74AHC595PW,112 equivalent, key selection criteria include propagation delay (≤10.5 ns @ 5 V), overvoltage-tolerant inputs (to 5.5 V), Schmitt-trigger inputs for noise immunity, 3-state output control, and compatibility with mixed-voltage logic interfaces.

Technical Context

The device implements two independent synchronous registers: an 8-stage shift register accepting serial data on DS and shifting on SHCP rising edges, and an 8-bit storage register loaded on STCP rising edges. Outputs Q0–Q7 reflect storage register contents only when OE is LOW; MR asynchronously clears the shift register but not the storage register.

Input voltage thresholds are CMOS-compatible (VIH = 3.85 V, VIL = 1.65 V @ VCC = 5.5 V), and all inputs tolerate up to 5.5 V regardless of VCC. Propagation delays are balanced across functions: SHCP→Q7S ≤10.5 ns, STCP→Qn ≤9.5 ns, OE→Qn enable/disable ≤13.0 ns @ VCC = 4.5–5.5 V, CL = 50 pF.

Key Specifications

Pinout & Package

TSSOP16 package (SOT403-1): plastic thin shrink small outline, 16 leads, 4.4 mm body width, 0.65 mm pitch, exposed pad optional (non-soldered or floating).

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 74AHCT595PW,112, the 74AHC595PW,112 offers superior noise immunity and lower propagation delay but requires CMOS-level input drive; versus SN74HC595PWR, it delivers 6.8× higher clock rate and 2.6× faster output response - critical for real-time LED animation or fast I/O update cycles.

Availability

74AHC595PW,112 is available at Aetrix Electronics and suitable for LED matrix drivers, microcontroller I/O expanders, industrial PLC output modules, and remote keypad interfaces requiring stable component supply across automotive, industrial, and consumer electronics programs.

Supply support for 74AHC595PW,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 focus on efficiency, reliability, and miniaturization.

The 74AHC series targets high-speed, low-power digital interface applications in space-constrained and thermally demanding environments, emphasizing robustness across wide voltage and temperature ranges.

FAQ

What is the minimum pulse width required on SHCP and STCP inputs?

The minimum high- and low-time for both SHCP and STCP is 5.0 ns at VCC = 4.5–5.5 V, as specified in Table 7. This allows reliable operation up to 170 MHz maximum clock frequency. Pulse widths below this value risk metastability or missed clock edges, especially under worst-case process/voltage/temperature conditions.

Can MR be used to clear outputs while preserving the storage register content?

Yes. MR is asynchronous and resets only the 8-stage shift register; the storage register and its parallel outputs (Q0–Q7) remain unchanged. This enables safe initialization of serial input path without disrupting currently displayed or driven data.

How does the 3-state output behavior interact with OE and power sequencing?

When OE is HIGH, all Q0–Q7 outputs enter high-impedance state regardless of VCC level or register content. However, if VCC is unpowered while OE is asserted, outputs float - no pull-down or clamping is guaranteed. Proper power sequencing (VCC stable before asserting OE) is required for predictable behavior.

Is the Q7S output registered or combinatorial relative to SHCP?

Q7S is the registered output of the shift register's MSB stage and changes synchronously on the rising edge of SHCP. Its propagation delay (SHCP→Q7S) is ≤10.5 ns @ VCC = 5 V, CL = 50 pF, confirming fully synchronous edge-aligned behavior suitable for cascading.