Overview
The MM5452V/NOPB is a liquid crystal display (LCD) driver integrated circuit produced by Texas Instruments. This monolithic IC utilizes CMOS metal gate, low threshold enhancement mode devices and is available in 40-pin PDIP and 44-pin PLCC packages. The MM5452 is designed to drive up to 32 segments of LCD and can be paralleled to increase this number, making it capable of driving a 4½-digit 7-segment display with minimal interface between the display and the data source. Although this product is no longer in production, it remains relevant for existing designs and maintenance.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Supply Voltage, VDD | 3 | 10 | V | |
| Operating Temperature | -40°C | 85°C | °C | |
| Average Supply Current, IDD (VDD=5V) | 10 | 40 | µA | |
| Input Logical '0' Voltage, VIL (VDD=5V) | 0.8 | V | ||
| Input Logical '1' Voltage, VIH (VDD=5V) | 2.0 | 8.0 | V | |
| Segment Sink Current, IOL (VDD=3V, VOUT=0.3V) | -20 | -40 | µA | |
| Segment Source Current, IOH (VDD=3V, VOUT=2.7V) | 20 | 40 | µA | |
| Clock Input Frequency, fCLOCK (VDD=5V) | 750 | kHz | ||
| Clock Input Duty Cycle | 40 | 60 | % |
Key Features
- Serial Data Input: Allows for serial data input for efficient data transfer.
- No Load Signal Required: No additional load signal is necessary for operation.
- DATA ENABLE: The MM5452 includes a DATA ENABLE feature for controlling data input.
- Wide Power Supply Operation: Operates over a wide power supply range of 3V to 10V.
- TTL Compatibility: Compatible with TTL logic levels.
- 32 or 33 Outputs: Can drive up to 32 or 33 segments of LCD.
- Alphanumeric and Bar Graph Capability: Supports alphanumeric and bar graph displays.
- Cascaded Operation Capability: Can be cascaded to increase the number of display segments.
Applications
- COPS™ or Microprocessor Displays: Suitable for displays controlled by microprocessors or COPS™ systems.
- Industrial Control Indicator: Used in industrial control panels for displaying various parameters.
- Digital Clock, Thermometer, Counter, Voltmeter: Ideal for a variety of digital measurement and display devices.
- Instrumentation Readouts: Used in various instrumentation applications requiring LCD displays.
- Remote Displays: Can be used in remote display applications where data needs to be displayed over a distance.
Q & A
- What is the MM5452V/NOPB used for?
The MM5452V/NOPB is used as a liquid crystal display (LCD) driver, capable of driving up to 32 segments of LCD and supporting various display configurations.
- What are the key features of the MM5452V/NOPB?
Key features include serial data input, no load signal required, wide power supply operation, TTL compatibility, and the ability to drive alphanumeric and bar graph displays.
- What is the operating temperature range of the MM5452V/NOPB?
The operating temperature range is from -40°C to 85°C.
- What is the supply voltage range for the MM5452V/NOPB?
The supply voltage range is from 3V to 10V.
- Is the MM5452V/NOPB still in production?
No, the MM5452V/NOPB is no longer in production. New designs should consider alternative products.
- What types of displays can the MM5452V/NOPB drive?
The MM5452V/NOPB can drive 4½-digit 7-segment displays, alphanumeric displays, and bar graph displays.
- Can the MM5452V/NOPB be cascaded?
Yes, the MM5452V/NOPB can be cascaded to increase the number of display segments.
- What are some common applications of the MM5452V/NOPB?
Common applications include COPS™ or microprocessor displays, industrial control indicators, digital clocks, thermometers, counters, voltmeters, instrumentation readouts, and remote displays.
- What is the package type for the MM5452V/NOPB?
The MM5452V/NOPB is available in 40-pin PDIP and 44-pin PLCC packages.
- What are the electrical characteristics of the MM5452V/NOPB?
The electrical characteristics include specific supply current, input logical voltage levels, segment sink and source currents, and clock input frequency and duty cycle, among others.
