AS1108WL-T

Product Overview

• Category: Integrated Circuit
• Use: LED Display Driver
• Characteristics: High-performance, low-power, serially interfaced
• Package: 24-pin TSSOP (Thin Shrink Small Outline Package)
• Essence: AS1108WL-T is a LED display driver designed for driving up to 8 digits of 7-segment displays or 64 individual LEDs. It provides an easy-to-use interface and offers various features for controlling the display.

Specifications

• Supply Voltage: 2.7V to 5.5V
• Maximum Display Digits: 8
• Maximum Segment Outputs: 64
• Serial Interface: SPI (Serial Peripheral Interface)
• Operating Temperature Range: -40°C to +85°C
• Package Dimensions: 4.4mm x 9.7mm x 1.2mm

Pin Configuration

The AS1108WL-T has a total of 24 pins. The pin configuration is as follows:

1. VDD - Power supply voltage
2. GND - Ground
3. DIN - Serial data input
4. CLK - Serial clock input
5. CS - Chip select input
6. RESET - Reset input
7. BLANK - Blank display control input
8. TEST - Test mode control input
9. SEG0 - Segment output 0
10. SEG1 - Segment output 1
11. SEG2 - Segment output 2
12. SEG3 - Segment output 3
13. SEG4 - Segment output 4
14. SEG5 - Segment output 5
15. SEG6 - Segment output 6
16. SEG7 - Segment output 7
17. DIG0 - Digit 0 output
18. DIG1 - Digit 1 output
19. DIG2 - Digit 2 output
20. DIG3 - Digit 3 output
21. DIG4 - Digit 4 output
22. DIG5 - Digit 5 output
23. DIG6 - Digit 6 output
24. DIG7 - Digit 7 output

Functional Features

• Serially interfaced for easy control and integration with microcontrollers
• Supports both common anode and common cathode displays
• Built-in multiplexing capability for driving multiple digits or LEDs simultaneously
• Adjustable display brightness through PWM (Pulse Width Modulation)
• Internal oscillator eliminates the need for external clock source
• Low power consumption for energy-efficient applications

Advantages and Disadvantages

Advantages: - Versatile and flexible for various LED display applications - Easy to interface with microcontrollers - Low power consumption extends battery life - Built-in multiplexing reduces component count and cost

Disadvantages: - Limited to driving up to 8 digits or 64 individual LEDs - Requires external resistors for current limiting

Working Principles

The AS1108WL-T LED display driver utilizes a serial interface (SPI) to receive data from a microcontroller. It internally multiplexes the segment outputs and digit outputs to drive the connected LED display. The driver includes an internal oscillator that generates the necessary timing signals for refreshing the display. By controlling the input signals, the driver can selectively turn on/off segments and digits, adjust brightness, and perform other display-related functions.

Application Field Plans

The AS1108WL-T LED display driver finds applications in various fields, including: - Digital clocks and timers - Instrumentation panels - Industrial control systems - Consumer electronics - Automotive displays - Medical devices

Alternative Models

• AS1107WL-T: Similar LED display driver with 7-digit capability
• AS1115WL-T: LED display driver with additional features like key scanning and keypad control
• AS1109WL-T: LED display driver with 9-digit capability

These alternative models provide similar functionality but with different digit or feature capabilities.

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