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74ALVCH32245 bảng dữ liệu(PDF) 6 Page - Texas Instruments |
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74ALVCH32245 bảng dữ liệu(HTML) 6 Page - Texas Instruments |
6 / 8 page SN74ALVCH32245 32-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS SCES282 – OCTOBER 1999 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 PARAMETER MEASUREMENT INFORMATION VCC = 2.5 V ± 0.2 V VCC/2 VCC/2 VCC/2 VCC/2 VCC/2 VCC/2 VCC/2 VCC/2 VOH VOL th tsu From Output Under Test CL = 30 pF (see Note A) LOAD CIRCUIT S1 Open GND 500 Ω 500 Ω Output Control (low-level enabling) Output Waveform 1 S1 at 2 × VCC (see Note B) Output Waveform 2 S1 at GND (see Note B) tPZL tPZH tPLZ tPHZ 0 V VOL + 0.15 V VOH – 0.15 V 0 V VCC 0 V 0 V tw VCC VCC VOLTAGE WAVEFORMS SETUP AND HOLD TIMES VOLTAGE WAVEFORMS PULSE DURATION VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES Timing Input Data Input Input tpd tPLZ/tPZL tPHZ/tPZH Open 2 × VCC GND TEST S1 NOTES: A. CL includes probe and jig capacitance. B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control. C. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr ≤ 2 ns, tf ≤ 2 ns. D. The outputs are measured one at a time with one transition per measurement. E. tPLZ and tPHZ are the same as tdis. F. tPZL and tPZH are the same as ten. G. tPLH and tPHL are the same as tpd. 0 V VCC VCC/2 tPHL VCC/2 VCC/2 VCC 0 V VOH VOL Input Output VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES VCC/2 VCC/2 tPLH 2 × VCC VCC Figure 2. Load Circuit and Voltage Waveforms |
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