Overview
The CD4543BMT is a BCD-to-seven segment latch/decoder/driver designed primarily for liquid-crystal display (LCD) applications. It is produced by Texas Instruments and is part of the CD4543B series. This device is functionally similar to and serves as a direct replacement for the CD4056B when pin 7 is connected to VSS. It features a single power supply requirement and includes display blanking capability instead of a level-shifting function, distinguishing it from the CD4056B.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | SOIC (D) |
| Pins | 16 |
| Operating Temperature Range (°C) | -55 to 125 |
| Supply Voltage Range (V) | 3 to 18 |
| Maximum Input Current (µA) | 1 µA at 18 V over full temperature range; 100 nA at 18 V and 25°C |
| Noise Margin (V) | 1 V at VDD= 5 V, 2 V at VDD= 10 V, 2.5 V at VDD= 15 V |
| Output Current Capability | Capability of driving two low power TTL loads, two HTL loads, or one low power Schottky load |
Key Features
- Display blanking of all illegal input combinations
- Latch storage of code
- Direct LED driving capability
- 100% tested for quiescent current at 20 V
- Meets all requirements of JEDEC Tentative Standard No. 13B, 'Standard Specifications for Description of B Series CMOS Devices'
- Pin-for-pin replacement for the CD4056B (with pin 7 tied to VSS)
Applications
- Instrument display driver
- Dashboard display driver
- Computer/calculator display driver
- Timing device driver (clocks, watches, timers)
Q & A
- What is the primary application of the CD4543BMT?
The CD4543BMT is primarily designed for liquid-crystal display (LCD) applications. - What are the different package types available for the CD4543B series?
The CD4543B series is available in 16-lead dual-in-line plastic packages (E suffix), 16-lead small-outline packages (M, M96, MT, and NSR suffixes), and 16-lead thin shrink small-outline packages (PW and PWR suffixes). - What is the operating temperature range of the CD4543BMT?
The operating temperature range is -55°C to 125°C. - Can the CD4543BMT drive LED displays?
Yes, the CD4543BMT has direct LED driving capability. - What is the maximum input current of the CD4543BMT?
The maximum input current is 1 µA at 18 V over the full temperature range and 100 nA at 18 V and 25°C. - Is the CD4543BMT compatible with the CD4056B?
Yes, it is a pin-for-pin replacement for the CD4056B when pin 7 is connected to VSS. - What is the noise margin of the CD4543BMT?
The noise margin is 1 V at VDD= 5 V, 2 V at VDD= 10 V, and 2.5 V at VDD= 15 V. - What types of displays can the CD4543BMT drive besides LCDs?
Besides LCDs, it can drive light emitting diode (LED), incandescent, gas-discharge, and fluorescent displays. - Is the CD4543BMT RoHS compliant?
Yes, the CD4543BMT is RoHS compliant. - What is the supply voltage range for the CD4543BMT?
The supply voltage range is 3 to 18 volts.
