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HCF4056B 데이터시트(PDF) 2 Page - STMicroelectronics |
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HCF4056B 데이터시트(HTML) 2 Page - STMicroelectronics |
2 / 10 page HCF4056B 2/10 INPUT EQUIVALENT CIRCUIT PIN DESCRIPTION FUNCTIONAL DIAGRAM PIN No SYMBOL NAME AND FUNCTION 5, 3, 2, 4 20, 21, 22, 23 BCD Inputs 9, 10, 11, 12, 13, 15, 14 a to g 7 - Segments Outputs 6 DISPLAY FREQ. IN Display Frequency Input 1 STROBE Strobe Input 7 VEE Negative Supply Voltage 8 VSS Negative Supply Voltage 16 VDD Positive Supply Voltage When the DF input is low, the output segments will be high when selected by the BCD inputs. When the DF input is high, the output segments will be low when selected by the BCD inputs. When a square wave is present at the DF input, the selected segments will have a square wave output that is 180 ° out of phase with the DF input. Those segments which are not selected will have a square wave output that is in phase with the input. DF square wave repetition rates for liquid crystal displays usually range from 30Hz (well above flicker rate) to 200Hz (well below the upper limit of the liquid crystal frequency response). HCF4056B provides a strobed-latch function at the BCD inputs. The decoding of all input combinations in this device provides displays of 0 to 9 as well as L, P, H, A, -, and a blank position. The level shifted function permits the use of different input and output signal swings. The input swings from a low level of VSS to a high level of VDD, while the outputs swing from a low level of VEE to the same high level of VDD. Thus, the input and output swings can be selected independently of each other over a 3 to 18V range. VSS may be connected to VEE when no level-shift function is required. The HCF4056B, however must be used together with HCF4054B to provide the common DF output. |
유사한 부품 번호 - HCF4056B_02 |
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유사한 설명 - HCF4056B_02 |
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