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74ACT16474 Datasheet(PDF) 6 Page - Texas Instruments |
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74ACT16474 Datasheet(HTML) 6 Page - Texas Instruments |
6 / 7 page 54ACT16474, 74ACT16474 18BIT REGISTERED BUS TRANSCEIVERS WITH 3STATE OUTPUTS SCAS238A − MAY 1992 − REVISED APRIL 1996 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 operating characteristics, VCC = 5 V, TA = 25°C PARAMETER TEST CONDITIONS TYP UNIT Cpd Power dissipation capacitance per transceiver Outputs enabled CL = 50 pF, f = 1 MHz 61 pF Cpd Power dissipation capacitance per transceiver Outputs disabled CL = 50 pF, f = 1 MHz 37 pF PARAMETER MEASUREMENT INFORMATION 50% VCC 1.5 V 1.5 V 1.5 V 3 V 3 V 0 V 0 V th tsu VOLTAGE WAVEFORMS Data Input tPLH tPHL tPHL tPLH VOH VOH VOL VOL 1.5 V 1.5 V 3 V 0 V 50% VCC 50% VCC Input Out-of-Phase Output In-Phase Output Timing Input 50% VCC VOLTAGE WAVEFORMS From Output Under Test CL = 50 pF (see Note A) LOAD CIRCUIT S1 2 × VCC 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) VOL VOH tPZL tPZH tPLZ tPHZ 1.5 V 1.5 V [ VCC 0 V 50% VCC 20% VCC 50% VCC 80% VCC [ 0 V 3 V GND Open VOLTAGE WAVEFORMS tPLH/tPHL tPLZ/tPZL tPHZ/tPZH Open 2 × VCC GND TEST S1 3 V 0 V 1.5 V 1.5 V tw VOLTAGE WAVEFORMS Input 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 ≤ 1 MHz, ZO = 50 Ω, tr = 3 ns, tf = 3 ns. D. The outputs are measured one at a time with one input transition per measurement. Figure 1. Load Circuit and Voltage Waveforms |
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