Overview
The M5450B7 is a monolithic MOS integrated circuit produced by STMicroelectronics, designed as an LED display driver. It is part of the M5450 and M5451 series, which are fabricated using N-channel silicon gate technology. This component is particularly suited for driving 4 or 5-digit alphanumeric displays with minimal interface requirements. The M5450B7 is available in a 40-pin dual in-line plastic package (PDIP40).
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Outputs | 34 | - |
| Output Sink Current | 15 mA | - |
| Supply Voltage (VDD) | 4.75 to 13.2 | V |
| Input Voltage (VI) | 0.3 to 15 | V |
| Off State Output Voltage (VO(off)) | 15 | V |
| Output Sink Current (IO) | 40 mA | - |
| Total Package Power Dissipation at 25°C | 1 W | - |
| Total Package Power Dissipation at 85°C | 560 mW | - |
| Junction Temperature (Tj) | 150 °C | - |
| Operating Temperature Range (TOP) | -25 to 85 °C | - |
| Storage Temperature Range (TSTG) | -65 to 150 °C | - |
| Input Clock Frequency (fclock) | 0 to 0.5 MHz | - |
Key Features
- 34 output drivers with 15 mA sink current capability.
- Current generator outputs without the need for external resistors.
- Continuous brightness control through a single pin.
- Serial data input with a clock signal for data transfer.
- Enable input (DATA ENABLE) for the M5450 model.
- Wide supply voltage operation from 4.75 V to 13.2 V.
- TTL compatibility.
- Internal power-on reset and internal load and reset signals synchronized with the clock.
Applications
- Microprocessor displays.
- Industrial control indicators.
- Relay drivers.
- Instrumentation readouts.
- Electronic tuning systems in radios and TVs.
- Duplexing multiple digits with a single driver.
Q & A
- What is the M5450B7 used for?
The M5450B7 is used as an LED display driver, particularly for driving 4 or 5-digit alphanumeric displays.
- What is the package type of the M5450B7?
The M5450B7 is available in a 40-pin dual in-line plastic package (PDIP40).
- What is the output sink current capability of the M5450B7?
The M5450B7 has an output sink current capability of 15 mA per output.
- What is the supply voltage range for the M5450B7?
The supply voltage range for the M5450B7 is from 4.75 V to 13.2 V.
- How is the brightness of the LED display controlled?
The brightness is controlled through a single pin by setting a reference current with an external variable resistor.
- What is the maximum clock frequency for data input?
The maximum clock frequency for data input is 0.5 MHz.
- Is the M5450B7 RoHS compliant?
No, the M5450B7 is not RoHS compliant.
- What are some typical applications of the M5450B7?
Typical applications include microprocessor displays, industrial control indicators, relay drivers, and instrumentation readouts.
- How does the M5450B7 handle data transfer?
Data transfer is accomplished through serial data and clock signals, with a format that includes a leading '1' followed by 35 data bits.
- What is the junction temperature limit for the M5450B7?
The junction temperature limit for the M5450B7 is 150 °C.
