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SN74HC138PWE4 датащи(PDF) 5 Page - Texas Instruments |
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SN74HC138PWE4 датащи(HTML) 5 Page - Texas Instruments |
5 / 22 page SN54HC138, SN74HC138 3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS SCLS107E − DECEMBER 1982 − REVISED SEPTEMBER 2003 5 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 switching characteristics over recommended operating free-air temperature range, CL = 50 pF (unless otherwise noted) (see Figure 1) PARAMETER FROM TO V TA = 25°C SN54HC138 SN74HC138 UNIT PARAMETER FROM (INPUT) TO (OUTPUT) VCC MIN TYP MAX MIN MAX MIN MAX UNIT 2 V 67 180 270 225 A, B, or C Any Y 4.5 V 18 36 54 45 t A, B, or C Any Y 6 V 15 31 46 38 ns tpd 2 V 66 155 235 195 ns Enable Any Y 4.5 V 18 31 47 39 Enable Any Y 6 V 15 26 40 33 2 V 38 75 110 95 tt Any 4.5 V 8 15 22 19 ns t y 6 V 6 13 19 16 operating characteristics, TA = 25°C PARAMETER TEST CONDITIONS TYP UNIT Cpd Power dissipation capacitance No load 85 pF PARAMETER MEASUREMENT INFORMATION VOLTAGE WAVEFORM INPUT RISE AND FALL TIMES 50% 50% 10% 10% 90% 90% VCC 0 V tr tf Input VOLTAGE WAVEFORMS PROPAGATION DELAY AND OUTPUT TRANSITION TIMES 50% 50% 50% 10% 10% 90% 90% VCC VOH VOL 0 V tr tf Input In-Phase Output 50% tPLH tPHL 50% 50% 10% 10% 90% 90% VOH VOL tr tf tPHL tPLH Out-of-Phase Output Test Point From Output Under Test CL = 50 pF (see Note A) LOAD CIRCUIT NOTES: A. CL includes probe and test-fixture capacitance. B. Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tr = 6 ns, tf = 6 ns. C. The outputs are measured one at a time with one input transition per measurement. D. tPLH and tPHL are the same as tpd. Figure 1. Load Circuit and Voltage Waveforms |
Аналогичный номер детали - SN74HC138PWE4 |
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Аналогичное описание - SN74HC138PWE4 |
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