HCF4056B BCD TO 7 SEGMENT DECODER /DRIVER WITH STROBED LATCH FUNCTION 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 DIP SOP VOLTAGE DOUBLING ACROSS DISPLAY (V - V ) = 18V RESULTS IN EFFECTIVE DD EE 36V (p-p) DRIVE ACROSS SELECTED ORDER CODES DISPLAY SEGMENTS PACKAGE TUBE T & R LOW OR HIGH OUTPUT LEVEL DC DRIVE DIP HCF4056BEY FOR OTHER TYPES OF DISPLAYS SOP HCF4056BM1 HCF4056M013TR ONE CHIP LOGIC LEVEL CONVERSION FOR DIFFERENT INPUT AND OUTPUT LEVEL SWINGS FULL DECODING OF ALL INPUT HCF4056B is a single digit BCD to 7 segment COMBINATIONS :0 - 9, L, H, P, AND decoder driver circuit that provides a level shifting BLANK POSITIONS function on the chip. This feature permits the BCD INPUT LEAKAGE CURRENT input-signal swings (V to V ) to be the same DD SS I = 100nA (MAX) AT V = 18V T = 25C I DD A as or different from the 7-segment output signal 100% TESTED FOR QUIESCENT CURRENT swings (V to V ). For example, the BCD DD EE MEETS ALL REQUIREMENTS OF JEDEC input-signal swings (V to V ) may be as low as DD SS JESD13BSTANDARD SPECIFICATIONS 0 to -3V, whereas the output-display drive signal FOR DESCRIPTION OF B SERIES CMOS swing (V to V ) may be from 0 to -5V. If V to DD EE DD DEVICE V exceeds 15V, V to V should be at least EE DD SS 4V. The 7-segment outputs are controlled by the DISPLAY-FREQUENCY (DF) input, which causes DESCRIPTION the selected segment outputs to be low, high, or a HCF4056B is a monolithic integrated circuit square wave output (for liquid crystal displays). fabricated in Metal Oxide Semiconductor technology available in DIP and SOP packages. PIN CONNECTION September 2002 1/10 Obsolete Product(s) - Obsolete Product(s)HCF4056B When the DF input is low, the output segments will this device provides displays of 0 to 9 as well as L, be high when selected by the BCD inputs. When P, H, A, -, and a blank position. The level shifted the DF input is high, the output segments will be function permits the use of different input and low when selected by the BCD inputs. When a output signal swings. The input swings from a low square wave is present at the DF input, the level of V to a high level of V while the SS DD, selected segments will have a square wave output outputs swing from a low level of V to the same that is 180 out of phase with the DF input. Those EE segments which are not selected will have a high level of V . Thus, the input and output DD square wave output that is in phase with the input. swings can be selected independently of each DF square wave repetition rates for liquid crystal other over a 3 to 18V range. V may be SS displays usually range from 30Hz (well above connected to V when no level-shift function is EE flicker rate) to 200Hz (well below the upper limit of required. The HCF4056B, however must be used the liquid crystal frequency response). HCF4056B together with HCF4054B to provide the common provides a strobed-latch function at the BCD inputs. The decoding of all input combinations in DF output. INPUT EQUIVALENT CIRCUIT PIN DESCRIPTION PIN No SYMBOL NAME AND FUNCTION 0 1 2 3 5, 3, 2, 4 BCD Inputs 2 , 2 , 2 , 2 9, 10, 11, 12, a to g 7 - Segments Outputs 13, 15, 14 DISPLAY 6 Display Frequency Input FREQ. IN 1 STROBE Strobe Input 7 V Negative Supply Voltage EE V 8 Negative Supply Voltage SS 16 V Positive Supply Voltage DD FUNCTIONAL DIAGRAM 2/10 Obsolete Product(s) - Obsolete Product(s)