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74HC595BQ Datasheet(PDF) 21 Page - NXP Semiconductors |
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74HC595BQ Datasheet(HTML) 21 Page - NXP Semiconductors |
21 / 28 page 2003 Jun 25 21 Philips Semiconductors Product specification 8-bit serial-in, serial or parallel-out shift register with output latches; 3-state 74HC595; 74HCT595 handbook, full pagewidth MSA697 tPLZ tPHZ outputs disabled outputs enabled 90% 10% outputs enabled OE input VM tPZL tPZH VM VM Qn output LOW-to-OFF OFF-to-LOW Qn output HIGH-to-OFF OFF-to-HIGH tr tf 90% 10% Fig.11 Waveforms showing the 3-state enable and disable times for input OE. 74HC595: VM = 50%; VI = GND to VCC. 74HCT595: VM = 1.3 V; VI = GND to 3 V. handbook, full pagewidth MGK563 D.U.T VCC VCC VI VO RT RL = 1 kΩ CL 50 pF PULSE GENERATOR Fig.12 Test circuit for 3-state outputs. Definitions for test circuit: RL = Load resistor. CL = Load capacitance including jig and probe capacitance. RT = Termination resistance should be equal to the output impedance Zo of the pulse generator. TEST SWITCH tPLH/tPHL open tPLZ/tPZL VCC tPHZ/tPZH GND |
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