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SN74HCS595 bảng dữ liệu(PDF) 9 Page - Texas Instruments |
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SN74HCS595 bảng dữ liệu(HTML) 9 Page - Texas Instruments |
9 / 26 page 7 Parameter Measurement Information Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tt < 2.5 ns. For clock inputs, fmax is measured when the input duty cycle is 50%. The outputs are measured one at a time with one input transition per measurement. CL (1) RL From Output Under Test VCC Test Point S1 S2 (1) CL includes probe and test-fixture capacitance. Figure 7-1. Load Circuit for 3-State Outputs CL (1) From Output Under Test Test Point (1) CL includes probe and test-fixture capacitance. Figure 7-2. Load Circuit for Push-Pull Outputs 50% tw Input 50% VCC 0 V Figure 7-3. Voltage Waveforms, Pulse Duration Clock Input 50% VCC 0 V 50% 50% VCC 0 V tsu Data Input th Figure 7-4. Voltage Waveforms, Setup and Hold Times 50% Input 50% VCC 0 V 50% 50% VOH VOL tPLH (1) tPHL (1) VOH VOL tPHL (1) tPLH (1) Output Output 50% 50% (1) The greater between tPLH and tPHL is the same as tpd. Figure 7-5. Voltage Waveforms Propagation Delays 50% Output Control 50% VCC 0 V 50% 50% § 9CC VOL tPZL (3) tPLZ (4) 90% VOH § 0 V tPZH (3) tPHZ (4) Output Waveform 1 S1 at VLOAD (1) Output Waveform 2 S1 at GND (2) 10% Figure 7-6. Voltage Waveforms Propagation Delays VOH VOL Output VCC 0 V Input tf (1) tr (1) 90% 10% 90% 10% tr (1) 90% 10% tf (1) 90% 10% (1) The greater between tr and tf is the same as tt. Figure 7-7. Voltage Waveforms, Input and Output Transition Times www.ti.com SN74HCS595 SCLS803 – AUGUST 2020 Copyright © 2020 Texas Instruments Incorporated Submit Document Feedback 9 Product Folder Links: SN74HCS595 |
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