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CXLE88170C High-Speed CMOS Shift Registers: The Core of Efficient Data Distribution and Control Systems

In digital system design and LED display driver, shift register is the core component of data distribution and signal expansion, and its performance directly affects the response speed and stability of the whole system. CXLE88170C is a high-speed, low-power shift register based on CMOS process, with standard SPI interface and flexible cascade capability, widely used in LED display, industrial control, intelligent equipment and communication module. This paper will comprehensively introduce the technical characteristics, electrical parameters, typical applications and design suggestions of the chip, and provide engineers with detailed reference for selection and use.N4I嘉泰姆

1. Product Introduction

The CXLE88170C is an open-drain output CMOS shift register with 8 independent output channels (QA-QH) supporting high-speed data shifting and latching outputs. The chip adopts standard serial peripheral interface (SPI), which can realize multi-device cascade, and is suitable for large-scale IO expansion and LED dot matrix driving scenarios. Its excellent low power consumption characteristics and high anti-interference ability make it an ideal choice in industrial and consumer electronics.N4I嘉泰姆

2. core features

2.1. High-speed data transmission

•  Maximum Shift Clock Frequency> 25MHzN4I嘉泰姆

•  Suitable for display systems and control modules with high refresh rate requirementsN4I嘉泰姆

2.2. Standard SPI interface

•  Compatible with Universal Serial Communication ProtocolN4I嘉泰姆

•  Support multi-device cascade, strong scalabilityN4I嘉泰姆

2.3. Low power design

•  Typical quiescent current is only 4 μA(TA = 25 ℃)N4I嘉泰姆

•  Suitable for battery-powered or energy-saving devicesN4I嘉泰姆

2.4. Multiple package options.

•  Provide SOP16 and DIP 800.00g package formsN4I嘉泰姆

•  Meet the different process requirements of patch and cartridgeN4I嘉泰姆

2.5. Wide voltage working range

•  Working voltage: 2.0V ~ 5.5VN4I嘉泰姆

•  Compatible with 3.3V and 5V systemsN4I嘉泰姆

3. Pin Definition and Function Description

4. electrical characteristics and operating conditions

4.1. ABSOLUTE MAXIMUM RATING

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(1) The long-term operation of the chip under the above-mentioned extreme parameter conditions may cause the reliability of the device to be reduced or permanently damaged.N4I嘉泰姆
It is recommended that any one of the parameters meet or exceed these limits in actual use.N4I嘉泰姆
(2) All voltage values are tested relative to the system ground.

•  Supply voltage VCC:-0.5V ~ 7.0VN4I嘉泰姆

•  Output current (SQH):25mAN4I嘉泰姆

•  Storage temperature:-50 ℃ ~ 150 ℃N4I嘉泰姆

4.2. Recommended working conditions

•  Supply voltage: 2.0V ~ 5.5VN4I嘉泰姆

•  Working temperature:-40 ℃ ~ 85 ℃N4I嘉泰姆

•  Input voltage: 0V ~ VCCN4I嘉泰姆

4.3. Key electrical parameters

•  Input high level voltage (Vih):≥ 70% VCCN4I嘉泰姆

•  Input low level voltage (Vil):≤ 30% VCCN4I嘉泰姆

•  Output Low Level (Vol): Typical 0.1V @ Iol = 20μAN4I嘉泰姆

4.4. Electrical characteristicsN4I嘉泰姆
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4.5. Switching characteristicsN4I嘉泰姆
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5. timing and control logic

5.1. Timing characteristicsN4I嘉泰姆

5.2. The operation of the CXLE88170C is based on three key signals:N4I嘉泰姆

•  ST (serial input): Bit-by-bit input dataN4I嘉泰姆

•  SCK (Shift Clock): Shift ST data into register on rising edgeN4I嘉泰姆

•  RCK (Latch Clock): Latch the contents of the shift register to the output on the rising edgeN4I嘉泰姆

5.3. Truth table summary:

5.4. Function Description

6. typical application scenarios

6.1. LED display driver

CXLE88170C the row or column signals that can drive the LED dot matrix module, the scanning control of the large-size screen is realized by cascading multiple chips.N4I嘉泰姆

6.2. Industrial IO Expansion

Expand digital output channels in PLC and industrial control motherboard to control loads such as relays and indicator lights.N4I嘉泰姆

6.3. Smart devices and IoT modules.

Used in low-power scenarios such as smart home controllers and sensor interface extensions.N4I嘉泰姆

6.4. Cascade application diagram.

ST→ CXLE88170C(1) → SQH → CXLE88170C(2) → … → SQH(n)N4I嘉泰姆
6.5. Input and output equivalent circuitN4I嘉泰姆
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7. Design Considerations

7.1. Power supply decoupling

It is recommended to connect a 100nF ceramic capacitor between VCC and GND to filter out high-frequency noise.N4I嘉泰姆

7.2. Signal integrity

Small resistors (such as 22Ω) are connected in series on high-frequency signal lines such as SCK and RCK to suppress ringing and overshoot.N4I嘉泰姆

7.3. ESD protection

The chip is an electrostatic sensitive device, and it is recommended to take anti-static measures in a dry environment, and to be grounded during welding and operation.N4I嘉泰姆

7.4. Output load capacity

The QA-QH is an open-drain output, and an external pull-up resistor can be adjusted according to the load current.N4I嘉泰姆

8. package and size

CXLE88170C are available in two packages:N4I嘉泰姆

•  SOP16: Suitable for high-density mounting, the size is about 10.00mm × 4.00mmN4I嘉泰姆

•  DIP16: Suitable for prototype development and plug-in welding, with a size of about 19.00mm × 6.60mmN4I嘉泰姆

9. epilogue

CXLE88170C with its high speed, low power consumption, strong scalability and other advantages, become the preferred device in the field of digital control system and LED driver. Whether you are developing high refresh rate LED screens, industrial control panels, or Internet of Things terminal devices, it can provide stable and reliable data distribution and output control capabilities.N4I嘉泰姆

For CXLE88170C samples, technical information or procurement support, welcome to visitJTM-IC official websiteOr contact our technical support team. We are committed to providing customers with high-performance, high-reliability integrated circuit solutions to help your project success.N4I嘉泰姆

Ten, the relevant chip selection guideMore similar products.....N4I嘉泰姆

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