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HV219 Datasheet(PDF) 5 Page - Supertex, Inc |
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HV219 Datasheet(HTML) 5 Page - Supertex, Inc |
5 / 9 page 5 HV219 DATA IN LE CLOCK DATA OUT OFF ON OUT (TYP) V 50% 50% 50% 50% t WLE t SD t SU t h 50% 50% t OFF 50% t DO t ON t WCL CLR D N + 1 D N D N - 1 50% 50% 90% 10% Logic Timing Waveforms Truth Table Data in 8-Bit Shift Register LE CL Output Switch State D0 D1 D2 D3 D4 D5 D6 D7 SW0 SW1 SW2 SW3 SW4 SW5 SW6 SW7 L L L OFF HL L ON L L L OFF HL L ON L L L OFF HL L ON L L L OFF HL L ON L L L OFF HL L ON L L L OFF HL L ON L L L OFF HL L ON L L L OFF HL L ON XXXXXXXX H L Hold Previous State XXXXXXXX X H OFF OFF OFF OFF OFF OFF OFF OFF Notes: 1. The eight switches operate independently. 2. Serial data is clocked in on the L to H transition clock. 3. The switches go to a state retaining their present condition at the rising edge of the LE. 4. When LE is low, the shift register data flows through the latch. 5. Shift register clocking has no effect on the switch states if LE is high. 6. The clear input overrides all other inputs. |
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