Diodes Incorporated 74AHC595S16-13

Overview

74AHC595S16-13 from Diodes Incorporated is an 8-bit serial-in, parallel-out shift register with storage register and 3-state outputs. It performs serial-to-parallel data conversion using dual-clock architecture (SHCP for shift register, STCP for output latch), supports 2.0–5.5 V supply, sinks/sources 8 mA at 4.5 V, and operates up to 130 MHz at 5 V. It is used in microcontroller I/O expansion for LED matrix control, segment drivers, and digital output staging.

For engineers reviewing the 74AHC595S16-13 datasheet, 74AHC595S16-13 pinout, 74AHC595S16-13 application, or 74AHC595S16-13 equivalent, key selection criteria include propagation delay (≤10.5 ns at 5 V), output enable timing (tEN/tDIS ≤13 ns), Schmitt-trigger inputs for noise immunity, and SO-16 package compatibility with legacy PCB footprints.

Technical Context

The device implements two independent synchronous registers: an 8-bit shift register clocked by SHCP (rising edge) and an 8-bit storage register clocked by STCP (rising edge). Data propagates from DS through Q0–Q7 on SHCP edges, then transfers to output pins only on STCP edges - enabling glitch-free latched output updates.

MR (active-low master reset) asynchronously clears the shift register without affecting the storage register; OE (active-low output enable) controls high-impedance state of all Q0–Q7 outputs. Input thresholds are Schmitt-triggered (VIH = 3.85 V min at VCC = 5.5 V), supporting robust noise rejection on serial control lines.

Key Specifications

Pinout & Package

74AHC595S16-13 uses a 16-pin SOIC (SO-16) package with standard 1.27 mm pitch, 10.0 mm × 4.0 mm body, and 1.5 mm height - compatible with automated SMT placement and reflow profiles per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HC595N and 74LV595PW, the 74AHC595S16-13 delivers superior noise immunity, higher speed, lower static current, and SO-16 drop-in compatibility - making it optimal for production-grade industrial and appliance control systems requiring reliability and layout continuity.

Availability

74AHC595S16-13 is available at Aetrix Electronics and suitable for LED matrix controllers, microcontroller I/O expansion, industrial sensor interfaces, and appliance control panels requiring stable component supply across multi-year production cycles.

Supply support for 74AHC595S16-13 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Taiwan, and Malaysia.

The 74AHC logic family targets high-speed, low-power, mixed-voltage digital interfacing - specifically engineered for robust serial communication and I/O expansion in industrial, computing, and consumer applications.

FAQ

Can 74AHC595S16-13 be operated at 3.3 V while maintaining full 130 MHz clock capability?

No. At VCC = 3.3 V, maximum guaranteed clock frequency is 125 MHz (per DS35486 Rev. 3–2, Table 6), and typical operation drops to ~100 MHz due to reduced drive strength and increased propagation delay. For 130 MHz performance, VCC ≥ 4.5 V is required.

What happens to Q0–Q7 outputs during MR assertion if STCP is held static?

MR assertion clears only the internal shift register (Q0–Q7 shift stages); the storage register and thus Q0–Q7 output pins retain their last latched values. Outputs remain unchanged unless STCP is pulsed after MR release.

Is Q7S output synchronized to SHCP or STCP, and what is its timing relationship to Q7?

Q7S is synchronized to SHCP rising edge and represents the value shifted out of Q7 one cycle after Q7 was loaded. Its tPD (SHCP→Q7S) is ≤10.5 ns at 5 V, matching Q7's propagation delay - enabling precise daisy-chain latency prediction.

Does the 74AHC595S16-13 support hot insertion or live I²C/SPI bus connection?

No. The device lacks hot-swap protection circuitry or bus-fault tolerance. Connecting or disconnecting while powered risks latch-up or ESD damage due to uncontrolled voltage sequencing on VCC, GND, or I/O pins.