Overview
The CD4543B, specifically the CD4543BM96 model, is a BCD-to-seven segment latch/decoder/driver designed primarily for liquid-crystal display (LCD) applications. It is also capable of driving light emitting diode (LED), incandescent, gas-discharge, and fluorescent displays. This device is functionally similar to and serves as a direct replacement for the CD4056B when pin 7 is connected to VSS. It differs from the CD4056B in that it has a display blanking capability instead of a level-shifting function and requires only one power supply.
Key Specifications
| Parameter | Description |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | CD4543BM96 |
| Package | 16-lead SOIC (D) |
| Pins | 16 |
| Operating Temperature Range | -55°C to 125°C |
| Supply Voltage Range | 3V to 18V |
| Maximum Operating Supply Voltage | 18 V |
| Minimum Operating Supply Voltage | 3 V |
| Maximum Quiescent Current | 0.1 mA |
| Maximum Input Current | 1 µA at 18 V over full package-temperature range; 100 nA at 18 V and 25°C |
| Noise Margin | 1 V at VDD= 5 V, 2 V at VDD= 10 V, 2.5 V at VDD= 15 V |
| Maximum Propagation Delay Time | 1200 ns @ 5V, 400 ns @ 10V, 300 ns @ 15V |
| Logic Function | Latch/Decoder/Driver |
| Number of Element Inputs | 4 |
| Number of Element Outputs | 7 |
| Mounting | Surface Mount |
| Lead Finish | Gold |
Key Features
- Display blanking of all illegal input combinations
- Latch storage of code
- Capability of driving two low power TTL loads, two HTL loads, or one low power Schottky load over the full rated-temperature range
- Pin-for-pin replacement for the CD4056B (with pin 7 tied to VSS)
- 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'
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 CD4543B?
The CD4543B is designed primarily for liquid-crystal display (LCD) applications but can also drive LED, incandescent, gas-discharge, and fluorescent displays.
- What are the key differences between the CD4543B and the CD4056B?
The CD4543B has a display blanking capability instead of a level-shifting function and requires only one power supply, whereas the CD4056B requires two power supplies in level-shifting mode.
- What is the operating temperature range of the CD4543B?
The operating temperature range is -55°C to 125°C.
- What is the supply voltage range for the CD4543B?
The supply voltage range is 3V to 18V.
- What is the maximum quiescent current of the CD4543B?
The maximum quiescent current is 0.1 mA.
- Can the CD4543B drive multiple types of loads?
Yes, it can drive two low power TTL loads, two HTL loads, or one low power Schottky load over the full rated-temperature range.
- What is the noise margin of the CD4543B at different supply voltages?
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 is the maximum propagation delay time of the CD4543B?
The maximum propagation delay time is 1200 ns @ 5V, 400 ns @ 10V, and 300 ns @ 15V.
- Is the CD4543B RoHS compliant?
Yes, the CD4543B is RoHS compliant.
- What is the lead finish of the CD4543B?
The lead finish is gold.
