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SN74HC191DR Fiches technique(PDF) 9 Page - Texas Instruments |
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SN74HC191DR Fiches technique(HTML) 9 Page - Texas Instruments |
9 / 21 page SN54HC191, SN74HC191 4BIT SYNCHRONOUS UP/DOWN BINARY COUNTERS SCLS121D − DECEMBER 1982 − REVISED OCTOBER 2003 9 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 PARAMETER MEASUREMENT INFORMATION VOLTAGE WAVEFORMS SETUP AND HOLD AND INPUT RISE AND FALL TIMES VOLTAGE WAVEFORMS PULSE DURATIONS th tsu 50% 50% 50% 10% 10% 90% 90% VCC VCC 0 V 0 V tr tf Reference Input Data Input 50% High-Level Pulse 50% VCC 0 V 50% 50% VCC 0 V tw Low-Level Pulse 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 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. For clock inputs, fmax is measured when the input duty cycle is 50%. D. The outputs are measured one at a time with one input transition per measurement. E. tPLH and tPHL are the same as tpd. Test Point From Output Under Test CL = 50 pF (see Note A) LOAD CIRCUIT Figure 1. Load Circuit and Voltage Waveforms |
Numéro de pièce similaire - SN74HC191DR |
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Description similaire - SN74HC191DR |
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