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SN74HC595D

8-bit shift register with latch, SOIC-16 SMD version of 74HC595

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制造商零件：

SN74HC595D

包装：

SOIC-16

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说明

产品概览

The SN74HC595D from Texas Instruments is an 8-bit shift register with output latches and 3-state outputs in an SOIC-16 surface-mount package. It expands 3 MCU I/O pins into 8 parallel outputs, cascadable for unlimited expansion. Functionally identical to the SN74HC595N DIP version.

主要规格

逻辑家族 74HC (High-Speed CMOS)
功能 8-bit shift register with output latch
Outputs 8 parallel (3-state) + serial cascade
Shift Frequency 52MHz (typ at 4.5V)
传播延迟 13ns (typ at 4.5V)
电源电压 2V to 6V
输出电流 +/-5.2mA (at 4.5V)
包装 SOIC-16
工作温度 -40 to +85 C

特点

  • 8-bit serial-in, parallel-out shift register
  • Output latch for glitch-free updates
  • 3-state outputs for bus sharing
  • Serial cascade output (Q7′) for daisy-chaining
  • 52MHz shift frequency
  • SOIC-16 surface-mount package

应用

  • MCU I/O expansion in surface-mount designs
  • LED display driving
  • Cascaded shift register chains
  • Parallel data output from serial stream

The SN74HC595D from Texas Instruments is the SOIC-16 surface-mount version of the industry-standard SN74HC595 8-bit shift register with output latch. It converts a serial data stream into 8 parallel outputs using only 3 MCU I/O pins (SER, SRCLK, RCLK). The two-stage architecture separates the shift register from the output latch: data shifts into the register on SRCLK rising edges, then transfers to the output latch on RCLK rising edges. This allows the outputs to update simultaneously without showing the shifting process. The Q7′ cascade output enables daisy-chaining: multiple SN74HC595D devices can be cascaded to expand to 16, 24, 32, or more outputs while still using only 3 MCU pins. The 3-state output enable (OE) allows the outputs to be disabled for bus-sharing applications. The SOIC-16 package is ideal for surface-mount PCB designs.

The SN74HC595D contains two 8-bit registers: the shift register and the output latch. Serial data on SER is shifted into the shift register on each rising edge of SRCLK. After 8 (or more) clock cycles, the RCLK (register clock) rising edge transfers the shift register contents to the output latch, updating QA-QH simultaneously. The SRCLR (shift register clear) asynchronously clears the shift register. The OE (output enable) pin, when HIGH, puts the outputs in a high-impedance state. The Q7′ output reflects the shift register bit 7, enabling cascading: Q7′ of the first device connects to SER of the second device. Both devices share SRCLK and RCLK, so the entire chain updates together. At 52MHz shift frequency, 8 bits can be shifted in 8/52MHz = 154ns, enabling rapid updates even with long cascaded chains.

针脚 名称 功能
1 QB Output B (latch output)
2 QC Output C
3 QD Output D
4 QE Output E
5 QF Output F
6 QG Output G
7 QH Output H
8 接地 地面
9 QH’ Serial cascade output (to next SER)
10 SRCLR Shift register clear (active LOW)
11 SRCLK Shift register clock
12 RCLK Register clock (latch clock)
13 OE Output enable (active LOW)
14 SER 串行数据输入
15 QA Output A
16 VCC Supply voltage (2-6V)
  • Surface-mount I/O expansion using 3 MCU pins for 8+ parallel outputs
  • Cascaded LED display driver chain with simultaneous latch update
  • PCB space-constrained designs using SOIC-16 instead of DIP-16
  • 3-state bus sharing with OE control for multiple peripheral sharing
模型 制造商 主要区别
SN74HC595N TI PDIP-16 through-hole version
74HC164 TI 8-bit shift register, no output latch
TPIC6B595 TI Power shift register, 50V/150mA open-drain outputs
74HC4094 TI Similar function with 3-state and cascading
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联系我们

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Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China

 

发货与付款

Materialparts is a professional global supplier of electronic components with over 20 years of industry experience. We provide one-stop supply of passive components, integrated circuits, as well as parts for industrial control, automotive electronics, consumer electronics and medical devices. Below are the unified shipping and payment policies applicable to all orders, samples and bulk purchases worldwide.

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5. Local Pickup in Shenzhen

Local pickup service is available for customers in Shenzhen and surrounding areas:
  • Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong Province, China
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Contact Information

Email: info@materialparts.com

Tel / WhatsApp: +86 13760382860

服务与包装

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

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We specialize in a full range of passive and active electronic components, including SMD resistors, power resistors, connectors, aviation connectors, LED beads, flexible circuit boards, printed circuit boards, and integrated circuits. Our professional team provides BOM list consolidation, component matching, and alternative model recommendation services. We support sample orders, small-batch trial production, and mass production orders with flexible MOQs to meet diverse procurement needs.

2. Genuine Product Guarantee & Full-process Quality Inspection

All products are sourced from official authorized channels and are 100% original genuine parts. Every batch of goods undergoes strict full-process quality inspection before delivery, with complete batch records and traceability documents provided. Our products comply with AEC-Q standards for automotive electronics and high-reliability specifications for medical devices. We eliminate counterfeits, refurbished parts and defective products from the source to secure your project production.

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6. Global Logistics & Document Services

We cooperate with mainstream international logistics providers including DHL, FedEx, UPS and TNT to achieve fast global delivery. We can provide complete export documents such as customs declaration files, commercial invoices and packing lists to ensure smooth customs clearance for international shipments. Local pickup is also available for customers in Shenzhen, China.

Professional Packaging Standards

Electronic components are sensitive to static electricity, collision, moisture and dust. We adopt industry-standard anti-static packaging solutions to fully ensure the integrity of goods during transportation and storage.

1. General Packaging Specifications

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We provide value-added services including personalized packaging, custom labeling and re-reeling according to customer requirements, fully matching your production and warehouse management standards.

Contact Information

For service consultation or packaging customization, please feel free to contact us:
Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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