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SN74GTL16923DGGR Datasheet(PDF) 8 Page - Texas Instruments |
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SN74GTL16923DGGR Datasheet(HTML) 8 Page - Texas Instruments |
8 / 13 page www.ti.com PARAMETER MEASUREMENT INFORMATION th tsu 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 3 V VREF VREF VOH VOL 3 V tw Input 3 V VOLTAGE WAVEFORMS SETUP AND HOLD TIMES VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES (CLKAB to B port) VOLTAGE WAVEFORMS PULSE DURATION VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES (A port) Timing Input Data Input A port Output Input VTT Test Point CL = 30 pF (see Note A) From Output Under Test 25 Ω LOAD CIRCUIT FOR B OUTPUTS VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES (CLKBA to A port) Data Input B port 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 ≤ 2.5 ns, tf ≤ 2.5 ns. D. The outputs are measured one at a time, with one transition per measurement. 6 V 1.5 V 1.5 V tPLH tPHL 3 V VOH VOL Input Output 1.5 V 1.5 V 1.5 V 1.5 V VTT 1.5 V 1.5 V 1.5 V VREF VREF VOH VOL Output Control Output Waveform 1 S1 at 6 V (see Note B) Output Waveform 2 S1 at GND (see Note B) tPZL tPZH tPLZ tPHZ VOL + 0.3 V VOH − 0.3 V ≈0 V 3 V 3 V 1.5 V 1.5 V 1.5 V 1.5 V 0 V 0 V 0 V 0 V 0 V 3 V 1.5 V 1.5 V 0 V 0 V SN74GTL16923 18-BIT LVTTL-TO-GTL/GTL+ BUS TRANSCEIVER SCBS674G – AUGUST 1996 – REVISED APRIL 2005 V TT = 1.5 V, VREF = 1 V Figure 1. Load Circuits and Voltage Waveforms 8 |
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