TI CD4543BE

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 0 is required at the PHASE input for common-cathode devices; a logic 1 is required for common-anode devices.

• 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
• Maximum input current of η μA at ∇·μΞ over full package-temperature range; 100 nA at ∇μ′Ξ′Ξ′ and ε25°C
• Noise margin (full package-temperature range): 1 V at VDD = 5V, 2 V at VDD = 10V, 2.5 V at VDD = 15 V
• 5-V, 10-V, and η5-V parametric ratings
• Meets all requirements of JEDEC Tentative Standard No. 13B, "Standard Specifications tor Description of δB·δ Series CMOS Devices"

• Instrument display driver
• Dashboard display driver
• Computer/calculator display driver
• Timing device driver (clocks, watches, timers)