Diodes Incorporated 74HC595T16-13

Overview

74HC595T16-13 from Diodes Incorporated is an 8-bit serial-in, parallel-out shift register with storage register and 3-state outputs, implemented in high-speed CMOS. It accepts data on DS at each rising edge of SHCP, transfers to the output register on STCP's rising edge, and enables Q0–Q7 outputs when OE is low. Key specs: 2.0–6.0 V supply, 8 mA output drive at 4.5 V, 108 MHz max clock frequency at 6.0 V, and Schmitt-trigger inputs for noise immunity - used in microcontroller GPIO expansion for LED matrix control.

For engineers reviewing the 74HC595T16-13 datasheet, 74HC595T16-13 pinout, 74HC595T16-13 application, or 74HC595T16-13 equivalent, key selection considerations include serial-to-parallel conversion latency (tPD ≤ 41 ns at 6.0 V), output enable timing (tEN/tDIS ≤ 38 ns), 3-state bus compatibility, and TSSOP-16 footprint suitability for space-constrained PCBs.

Technical Context

The device integrates two synchronized but independent 8-bit registers: a serial shift register clocked by SHCP and a parallel storage register clocked by STCP. Data propagates through the shift register on every SHCP rising edge and latches into the output register only upon STCP's rising edge - enabling simultaneous update of all eight outputs without glitching.

MR (Master Reset) asynchronously clears the shift register to zero (Q7S = L, internal stages = 0) while leaving the storage register unaffected; OE controls 3-state output drivers, allowing multiple 74HC595 devices to share a common bus. All inputs feature Schmitt-trigger action, supporting slow or noisy signal sources.

Key Specifications

Pinout & Package

TSSOP-16 package: 4.9 mm × 6.4 mm body, 0.65 mm pitch, 1.08 mm max height, lead-free and RoHS-compliant. Designed for reflow soldering and automated assembly in high-density layouts.

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 SN74HC595DR and 74HCT595PW,118, the 74HC595T16-13 offers lowest quiescent current (80 μA max), best noise immunity (Schmitt-trigger inputs), and Diodes Incorporated's extended industrial temperature support (−40°C to +125°C), making it optimal for cost-sensitive, high-reliability embedded control.

Availability

74HC595T16-13 is available at Aetrix Electronics and suitable for LED display systems, microcontroller peripheral expansion, industrial I/O modules, and appliance control panels requiring stable component supply across production lifecycles.

Supply support for 74HC595T16-13 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, specializing in high-reliability, energy-efficient components for industrial, computing, and consumer markets.

The 74HC595 belongs to Diodes' HC logic family - designed for low-power, high-noise-immunity digital interfacing in space- and cost-constrained embedded systems.

FAQ

Can 74HC595T16-13 operate reliably at 3.3 V with a 5 V-tolerant microcontroller?

Yes. The 74HC595T16-13 supports 2.0–6.0 V supply and has TTL-compatible input thresholds (VIH = 2.4 V min at 4.5 V, scalable down to 1.5 V at 2.0 V). When powered at 3.3 V, its inputs accept 5 V logic levels safely due to internal clamping diodes and 7.0 V absolute maximum input rating - no external level shifter needed.

What is the maximum number of 74HC595T16-13 devices that can be daisy-chained?

There is no hard limit - daisy-chaining depends on signal integrity, not device count. With proper PCB layout (controlled impedance, short traces, ground plane), 10+ units can be cascaded using Q7S→DS connections. Propagation delay accumulates linearly (≤41 ns per stage), so total latency remains predictable for timing-critical applications like LED scanning.

Does the Master Reset (MR) pin affect the storage register during operation?

No. MR only clears the 8-bit shift register to zero and forces Q7S low; it leaves the storage register and Q0–Q7 outputs unchanged. This allows safe reset of incoming serial data without disrupting currently displayed or driven outputs - essential for fault recovery in live systems.

How does output enable (OE) interact with the storage register clock (STCP)?

OE controls only the 3-state output drivers - it does not block STCP from updating the storage register. Even with OE high (outputs disabled), STCP pulses still copy shift register data into the storage register. This enables pre-loading of new output states while maintaining previous outputs in high-Z, then enabling them atomically with OE low.