产品介绍

HCF4056 BCD to 7-Segment Decoder/Driver

HCF4056B is a monolithic integrated circuit fabricated in Metal Oxide Semiconductor technology available in DIP and SOP packages.

HCF4056B is a single digit BCD to 7 segment decoder driver circuit that provides a level shifting function on the chip. This feature permits the BCD input-signal swings (VDD to VSS) to be the same as or different from the 7-segment output signal swings (VDD to VEE). For example, the BCD input-signal swings (VDD to VSS) may be as low as 0 to -3V, whereas the output-display drive signal swing (VDD to VEE) may be from 0 to -5V. If VDD to VEE exceeds 15V, VDD to VSS should be at least 4V. The 7-segment outputs are controlled by the DISPLAY-FREQUENCY (DF) input, which causes the selected segment outputs to be low, high, or a square wave output (for liquid crystal displays).

技术特性

• QUIESCENT CURRENT SPECIF. UP TO 20V
• OPERATION OF LIQUID CRYSTALS WITH CMOS CIRCUITS PROVIDES ULTRA LOW POWER DISPLAY.
• EQUIVALENT AC OUTPUT DRIVE FOR LIQUID CRYSTAL DISPLAYS -NO EXTERNAL CAPACITOR REQUIRED
• VOLTAGE DOUBLING ACROSS DISPLAY [(VDD - VEE) = 18V] RESULTS IN EFFECTIVE 36V (p-p) DRIVE ACROSS SELECTED DISPLAY SEGMENTS
• LOW OR HIGH OUTPUT LEVEL DC DRIVE FOR OTHER TYPES OF DISPLAYS
• ONE CHIP LOGIC LEVEL CONVERSION FOR DIFFERENT INPUT AND OUTPUT LEVEL SWINGS
• FULL DECODING OF ALL INPUT COMBINATIONS : "0 - 9, L, H, P, A" AND BLANK POSITIONS
• INPUT LEAKAGE CURRENT
  • II = 100nA (MAX) AT VDD = 18V TA = 25 °C
• 100% TESTED FOR QUIESCENT CURRENT
• MEETS ALL REQUIREMENTS OF JEDEC JESD13B "STANDARD SPECIFICATIONS FOR DESCRIPTION OF B SERIES CMOS DEVICES"

HCF4056 订购信息

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