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SN74HCT139DG4 데이터시트(PDF) 4 Page - Texas Instruments |
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SN74HCT139DG4 데이터시트(HTML) 4 Page - Texas Instruments |
4 / 15 page SN54HCT139, SN74HCT139 DUAL 2LINE TO 4LINE DECODERS/DEMULTIPLEXERS SCLS066D − MARCH 1982 − REVISED SEPTEMBER 2003 4 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 VCC TA = 25°C SN54HCT139 SN74HCT139 UNIT PARAMETER FROM (INPUT) TO (OUTPUT) VCC MIN TYP MAX MIN MAX MIN MAX UNIT A or B Y 4.5 V 14 34 51 43 tpd A or B Y 5.5 V 12 30 50 40 ns tpd G Y 4.5 V 11 34 51 43 ns G Y 5.5 V 10 30 50 40 tt Y 4.5 V 8 15 22 19 ns tt Y 5.5 V 6 14 21 17 ns operating characteristics, TA = 25°C PARAMETER TEST CONDITIONS TYP UNIT Cpd Power dissipation capacitance per decoder No load 25 pF PARAMETER MEASUREMENT INFORMATION VOLTAGE WAVEFORM INPUT RISE AND FALL TIMES 1.3 V 1.3 V 0.3 V 0.3 V 2.7 V 2.7 V 3 V 0 V tr tf Input VOLTAGE WAVEFORMS PROPAGATION DELAY AND OUTPUT RISE AND FALL TIMES 1.3 V 1.3 V 1.3 V 10% 10% 90% 90% 3 V VOH VOL 0 V tr tf Input In-Phase Output 1.3 V tPLH tPHL 1.3 V 1.3 V 10% 10% 90% 90% VOH VOL tr tf tPHL tPLH Out-of-Phase Output Test Point From Output Under Test 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. CL = 50 pF (see Note A) Figure 1. Load Circuit and Voltage Waveforms PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. |
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