LC75821ED-E

Product Overview

• Category: Integrated Circuit (IC)
• Use: Display driver for dot matrix liquid crystal displays (LCDs)
• Characteristics: High voltage CMOS technology, low power consumption, compact package
• Package: 64-pin plastic QFP (Quad Flat Package)
• Essence: Efficiently drives and controls dot matrix LCDs
• Packaging/Quantity: Available in reels, quantity depends on supplier

Specifications

• Supply Voltage: 2.7V to 5.5V
• Operating Temperature: -20°C to +70°C
• Maximum Display Points: 256 x 64 dots
• Display Duty Ratio: 1/32
• Built-in RAM: 512 x 8 bits
• Interface: Serial or parallel
• Clock Frequency: Up to 2 MHz
• Output Current: 40 mA (max)

Detailed Pin Configuration

The LC75821ED-E has a total of 64 pins. Here is a brief overview of the pin functions:

• VDD: Power supply voltage
• VSS: Ground
• V0: LCD drive voltage
• CS1-CS4: Chip select inputs
• WR: Write control input
• RD: Read control input
• RESET: Reset control input
• A0-A7: Address inputs
• D0-D7: Data inputs/outputs
• SEG1-SEG256: Segment outputs
• COM1-COM64: Common outputs

For a complete pin configuration diagram, please refer to the datasheet.

Functional Features

• Efficiently drives and controls dot matrix LCDs
• Supports up to 256 x 64 dots display resolution
• Low power consumption due to high voltage CMOS technology
• Built-in RAM for storing display data
• Serial or parallel interface for easy communication
• Wide operating temperature range for various environments

Advantages and Disadvantages

Advantages: - High resolution display support - Low power consumption - Compact package size - Versatile interface options

Disadvantages: - Limited maximum display duty ratio - Requires external LCD drive voltage (V0)

Working Principles

The LC75821ED-E is designed to efficiently drive and control dot matrix LCDs. It utilizes high voltage CMOS technology, which ensures low power consumption while providing reliable performance. The built-in RAM allows for the storage of display data, enabling smooth and accurate updates.

The IC can be interfaced with a microcontroller or other devices through either a serial or parallel interface. This flexibility makes it compatible with a wide range of applications.

To operate, the LC75821ED-E requires an external LCD drive voltage (V0) to power the connected LCD panel. The chip select inputs (CS1-CS4), write control input (WR), read control input (RD), and address/data inputs (A0-A7, D0-D7) are used to communicate with the IC and send display data.

Detailed Application Field Plans

The LC75821ED-E is commonly used in various applications that require dot matrix LCD displays. Some potential application fields include:

1. Automotive: Instrument clusters, car audio systems, navigation displays.
2. Consumer Electronics: Digital cameras, portable media players, home appliances.
3. Industrial Equipment: Test and measurement instruments, control panels, industrial automation.
4. Medical Devices: Patient monitoring systems, medical equipment interfaces.
5. Communication Devices: Mobile phones, handheld radios, wireless devices.

Detailed and Complete Alternative Models

1. LC75822ED-E: Similar to LC75821ED-E but with additional features.
2. LC75823ED-E: Higher resolution variant supporting up to 320 x 64 dots.
3. LC75824ED-E: Enhanced version with extended temperature range and improved ESD protection.

These alternative models offer similar functionality but may have additional features or specifications tailored for specific applications.

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