CD4543B Series
CMOS BCD-to-Seven-Segment Latch/Decoder/Driver for Liquid-Crystal Displays
Manufacturer: Texas Instruments
Catalog
CMOS BCD-to-Seven-Segment Latch/Decoder/Driver for Liquid-Crystal Displays
Key Features
• Display blanking of all illegal input combinationsLatch storage of codeCapability of driving two low power TTL loads, two HTL loads, or one low power Schottky load over the full rated-temperature rangePin-for-pin replacement for the CD4056B (with pin 7 tied to VSS)Direct LED driving capability100% tested for quiescent current at 20 VMaximum input current of 1 µA at 18 V over full package-temperature range; 100 nA at 18 V and 25°CNoise margin (full package-temperature range) =1 V at VDD= 5 V2 V at VDD= 10 V2.5 V at VDD= 15 V5-V, 10-V, and 15-V parametric ratingsMeets all requirements of JEDEC Tentative Standard No. 13B, "Standard Specifications for Description of ’B’ Series CMOS Devices"Applications:Instrument display driverDashboard display driverComputer/calculator display driverTiming device driver (clocks, watches, timers)Display blanking of all illegal input combinationsLatch storage of codeCapability of driving two low power TTL loads, two HTL loads, or one low power Schottky load over the full rated-temperature rangePin-for-pin replacement for the CD4056B (with pin 7 tied to VSS)Direct LED driving capability100% tested for quiescent current at 20 VMaximum input current of 1 µA at 18 V over full package-temperature range; 100 nA at 18 V and 25°CNoise margin (full package-temperature range) =1 V at VDD= 5 V2 V at VDD= 10 V2.5 V at VDD= 15 V5-V, 10-V, and 15-V parametric ratingsMeets all requirements of JEDEC Tentative Standard No. 13B, "Standard Specifications for Description of ’B’ Series CMOS Devices"Applications:Instrument display driverDashboard display driverComputer/calculator display driverTiming device driver (clocks, watches, timers)
Description
AI
CD4543B 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 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. When the CD4056B is used in the level shifting mode, two power supplies are required. When the CD4543B is used for LCD applications, a square wave must be applied to the PHASE input and the backplane of the LCD device. For LED applications a logic 1 is required at the PHASE input for common-cathode devices; a logic 0 is required for common-anode devices (see truth table).
The CD4543B is supplied 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).
CD4543B 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 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. When the CD4056B is used in the level shifting mode, two power supplies are required. When the CD4543B is used for LCD applications, a square wave must be applied to the PHASE input and the backplane of the LCD device. For LED applications a logic 1 is required at the PHASE input for common-cathode devices; a logic 0 is required for common-anode devices (see truth table).
The CD4543B is supplied 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).
