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74ACT11640DW Scheda tecnica(PDF) 4 Page - Texas Instruments |
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74ACT11640DW Scheda tecnica(HTML) 4 Page - Texas Instruments |
4 / 5 page 54ACT11640, 74ACT11640 OCTAL BUS TRANSCEIVERS WITH 3STATE OUTPUTS SCAS027A − D2957, JULY 1987 − REVISED APRIL 1993 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77001 2−4 switching characteristics over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 1) PARAMETER FROM TO TA = 25°C 54ACT11640 74ACT11640 UNIT PARAMETER FROM (INPUT) TO (OUTPUT) MIN TYP MAX MIN MAX MIN MAX UNIT tPLH A or B B or A 1.5 6.3 9.6 1.5 11 1.5 10.5 ns tPHL A or B B or A 1.5 5.7 8.6 1.5 10 1.5 9.5 ns tPZH G A or B 1.5 8.8 12.2 1.5 14.2 1.5 13.4 ns tPZL G A or B 1.5 8.4 12.3 1.5 14.5 1.5 13.6 ns tPHZ G A or B 1.5 9.1 12.9 1.5 14.5 1.5 13.9 ns tPLZ G A or B 1.5 9.6 13.1 1.5 15 1.5 14.2 ns 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 45 pF Cpd Power dissipation capacitance per transceiver Outputs disabled CL = 50 pF, f = 1 MHz 12 pF PARAMETER MEASUREMENT INFORMATION From Output Under Test CL = 50 pF (see Note A) LOAD CIRCUIT S1 2 × VCC 500 Ω 500 Ω tPLH tPHL Output Control (low-level enabling) Output Waveform 1 S1 at 2 × VCC (see Note C) Output Waveform 2 S1 at GND (see Note C) VOL VOH tPZL tPZH tPLZ tPHZ 1.5 V 1.5 V 1.5 V 1.5 V [ VCC 3 V 0 V 50% VCC 50% VCC VOH VOL 0 V 50% VCC 20% VCC 50% VCC 80% VCC [ 0 V 3 V GND Open Input (see Note B) Output VOLTAGE WAVEFORMS VOLTAGE WAVEFORMS tPLH/tPHL tPLZ/tPZL tPHZ/tPZH Open 2 × VCC GND TEST S1 NOTES: A. CL includes probe and jig capacitance. B. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr = 3 ns, tf = 3 ns. C. 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. 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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