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SN74GTLPH1645DGVR Datenblatt(PDF) 10 Page - Texas Instruments |
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SN74GTLPH1645DGVR Datenblatt(HTML) 10 Page - Texas Instruments |
10 / 22 page www.ti.com PARAMETER MEASUREMENT INFORMATION From Output Under Test CL = 50 pF (see Note A) LOAD CIRCUIT FOR A OUTPUTS S1 Open GND 500 Ω 500 Ω TEST tPLH/tPHL tPLZ/tPZL tPHZ/tPZH S1 Open 6 V GND tPLH tPHL Output Control Output Waveform 1 S1 at 6 V (see Note B) Output Waveform 2 S1 at GND (see Note B) VOL VOH tPZL tPZH tPLZ tPHZ 3 V 0 V VOH VOL 0 V VOL + 0.3 V VOH − 0.3 V ≈0 V Input 3 V 3 V VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES (A port to B port) VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES (A port) Output 1.5 V Test Point CL = 30 pF (see Note A) From Output Under Test 12.5 Ω LOAD CIRCUIT FOR B OUTPUTS 0 V VOH VOL Input VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES (B port to A port) Output 1.5 V 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. 6 V tPLH tPHL 1.5 V 1.5 V 1.5 V 1.5 V 1.5 V 1.5 V 1.5 V 1.5 V 1 V 1 V 1 V 1 V SN74GTLPH1645 16-BIT LVTTL-TO-GTLP ADJUSTABLE-EDGE-RATE BUS TRANSCEIVER SCES290D – OCTOBER 1999 – REVISED JUNE 2005 Figure 1. Load Circuits and Voltage Waveforms 10 |
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