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74HC594D118

8-bit shift register with output latch, HC, SOIC-16

7695

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Pieza del fabricante：

74HC594D118

Paquete：

16-Pin SOIC (9.9 x 3.9 x 1.5 mm)

Descripción

Productos

The 74HC594D118 is an Nexperia 8-bit shift register with output register and separate clock lines, 2V-6V supply, 65MHz shift frequency, tri-state outputs, and serial-in/parallel-out architecture. Packaged in SOIC-16, -40C to +125C.

Especificaciones

Bits	8-bit shift + 8-bit output register
Supply	2 V to 6 V
Shift Frequency	65 MHz (typ at 4.5V)
Output Type	Tri-state
Retardo de propagación	13 ns typ at 4.5V
Paquete	SOIC-16

Características

8-bit shift register with output latch
Separate shift and storage clock lines
Tri-state outputs for bus-oriented applications
Direct clear (SRCLR) for shift register
Output enable (OE) pin
Serial cascade output (Q7S) for daisy-chaining
Wide 2V-6V supply range

Aplicaciones

LED display driving and multiplexing
GPIO expansion via SPI-like interface
Serial-to-parallel data conversion
Cascaded control systems

Introducción del producto:74HC594D118 Presentación del producto

The 74HC594D118 is a Nexperia 8-bit shift register with output register in a 16-pin SOIC package. The device consists of an 8-bit shift register and an 8-bit D-type storage register with separate clock and control inputs, allowing data to be shifted in serially and then transferred to the output register simultaneously. This two-stage architecture prevents output glitches during serial data loading, as the outputs only change when the storage register is updated. The shift register has a direct overriding clear (SCLR) and serial input (SER), and the storage register has a direct overriding clear (RCLR) and output enable (OE). The cascading output (Q7S) enables daisy-chaining multiple devices for longer shift registers. The device operates from 2.0V to 6.0V with typical propagation delay of 13ns at VCC=5V, supporting shift rates up to 76 MHz. The -118 suffix indicates tape and reel packaging.

Principio de funcionamiento:74HC594D118 Principio de funcionamiento

The 74HC594D118 operates as a two-stage serial-to-parallel converter. Data is shifted into the 8-bit shift register on the rising edge of the shift register clock (SCLK). The serial data enters through the SER pin and propagates through D1-D8 with each clock pulse. The Q7S output provides the overflow bit for cascading additional shift registers. Once all 8 bits are loaded, the data is transferred from the shift register to the 8-bit storage register on the rising edge of the register clock (RCLK). The storage register outputs (Q0-Q7) reflect the latched data only when the output enable (OE) is low; when OE is high, the outputs are in a high-impedance state. The SCLR (active low) clears the shift register independently of the storage register, and the RCLR (active low) clears the storage register independently of the shift register. This separation allows simultaneous data shifting and output holding.

Descripción de la clavija:74HC594D118 Definición y funciones de las clavijas

Pin	Mnemonic	Descripción
1	OE	Output enable (active low)
2	SCLR	Shift register clear (active low)
3	SCLK	Shift register clock input
4	RCLK	Storage register clock input
5	SER	Entrada de datos serie
6	Q7S	Cascading serial output
7	RCLR	Storage register clear (active low)
8	GND	Suelo
9	Q0	Parallel output 0
10-16	Q1-Q7	Parallel outputs 1-7

Application Scenarios:In which products and applications is74HC594D118 usado

LED matrix column/row driver with two-stage latch preventing display glitches during serial data load
GPIO expander for MCU via SPI with daisy-chain Q7S output for 16+ bits of I/O
Relay board control with OE enabling/disabling all outputs simultaneously for safe power-up
Seven-segment display multiplexer with independent shift and storage clock for flicker-free update

Alternative Models:What chips are recommended as replacements for 74HC594D118

Modelo	Fabricante	Diferencia clave
74HC595D118	Nexperia	8-bit shift register, no separate clear
74HCT594D118	Nexperia	TTL input levels, same function
SN74HC594DR	TI	Same function, TI brand
74HC595PW118	Nexperia	595 variant, TSSOP-16