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74HC595D

8-bit serial-in/parallel-out shift register with output latches, 3-state, 2.0-6.0V, SO16, cascading

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Pieza del fabricante：

74HC595D

Paquete：

SO16 (SOT109-1) 10.0 x 3.9 x 1.75 mm

Marca：

Categorías de productos：

Circuitos integrados IC

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Descripción

Productos

The Nexperia 74HC595D is an 8-bit serial-in/parallel-out shift register with output latches and 3-state outputs in an SO16 package. It operates from 2.0 V to 6.0 V, features a storage register with 3-state outputs, and supports cascading for expanding output ports via serial communication.

Especificaciones

Supply Voltage (VCC)	2.0 V to 6.0 V
Logic Family	74HC (CMOS)
Shift Register Width	8 bits
Max Clock Frequency	25 MHz (at 4.5V)
Output Type	3-state (via OE)
Output Drive	±5.2 mA
Retardo de propagación	13 ns (typical at 4.5V)
Temperatura de funcionamiento	-40°C to +125°C
ESD Protection	HBM >2000V, CDM >1000V

Características

8-bit serial-in parallel-out shift register with output latches
3-state outputs for bus-oriented applications
Serial output for cascading multiple devices
Direct clear (SRCLR) for shift register reset
Wide supply voltage range from 2.0 V to 6.0 V
CMOS low power dissipation with high noise immunity

Aplicaciones

LED display driver and multiplexing
Serial-to-parallel data conversion
Output port expansion for microcontrollers
Cascaded display systems

Introducción del producto:74HC595D Presentación del producto

The Nexperia 74HC595D is an 8-bit serial-in parallel-out shift register with output latches and 3-state outputs in an SO16 package. The device contains an 8-bit shift register that feeds an 8-bit storage register. The shift register has a serial data input (SER), a serial output (Q7′) for cascading, and a serial clock input (SRCLK). The storage register has a parallel 8-bit output and a storage clock input (RCLK). The active LOW output enable input (OE) controls the 3-state outputs. When OE is HIGH, the outputs are in a high-impedance state. The active LOW shift register clear (SRCLR) can reset the shift register independently of the storage register. The device operates from 2.0V to 6.0V with ±5.2 mA output drive and is specified from -40°C to +125°C.

Principio de funcionamiento:74HC595D Principio de funcionamiento

The 74HC595D operates in two stages: a shift register and a storage register. Data is shifted into the 8-bit shift register on each rising edge of the shift clock (SRCLK) via the serial data input (SER). After 8 clock cycles, the shifted data can be transferred to the storage register by applying a rising edge to the storage clock (RCLK). This two-stage architecture allows new data to be shifted in while the previous data remains stable on the outputs. The serial output (Q7′) provides the last bit of the shift register for cascading to subsequent 74HC595 devices. The active LOW output enable (OE) controls the 3-state output buffers — when HIGH, all outputs are high-impedance. The active LOW shift register clear (SRCLR) resets the shift register to all zeros without affecting the storage register. Multiple devices can be cascaded by connecting Q7′ to the SER of the next device.

Descripción de la clavija:74HC595D Definición y funciones de las clavijas

Pin	Nombre	Tipo	Función
1	Q1	Salida	Storage register output bit 1
2	Q2	Salida	Storage register output bit 2
3	Q3	Salida	Storage register output bit 3
4	Q4	Salida	Storage register output bit 4
5	Q5	Salida	Storage register output bit 5
6	Q6	Salida	Storage register output bit 6
7	Q7	Salida	Storage register output bit 7
8	GND	Potencia	Ground (0 V)
9	Q7′	Salida	Serial output from shift register (for cascading)
10	SRCLR	Entrada	Shift register clear (active LOW)
11	SRCLK	Entrada	Shift register clock input
12	RCLK	Entrada	Storage register clock (latch) input
13	OE	Entrada	Output enable input (active LOW, 3-state)
14	SER	Entrada	Entrada de datos serie
15	Q0	Salida	Storage register output bit 0
16	VCC	Potencia	Supply voltage

Application Scenarios:In which products and applications is74HC595D usado

LED matrix and 7-segment display driver circuits
Serial-to-parallel data conversion in embedded systems
Output port expansion for microcontrollers with limited GPIO
Cascaded display systems for large LED panels
Industrial control relay driver arrays

Alternative Models:What chips are recommended as replacements for 74HC595D

Fabricante	Número de pieza	Paquete	Notas
Texas Instruments	SN74HC595D	SOIC-16	Pin-to-pin compatible
onsemi	MC74HC595ADTR2G	TSSOP-16	Equivalent function
Microchip	MM74HC595MTCX	TSSOP-16	Equivalent function
Nexperia	74HCT595D	SO16	TTL input level variant
Nexperia	74HC595PW	TSSOP16	Same function, TSSOP package