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CD54HC237 Folha de dados(PDF) 7 Page - Texas Instruments |
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CD54HC237 Folha de dados(HTML) 7 Page - Texas Instruments |
7 / 19 page 7 HCT TYPES Propagation Delay An to any Y or Y Address to Output tPLH, tPHL CL = 50pF 4.5 - - 38 - 48 - 57 ns tPLH, tPHL CL = 15pF 5 - 16 - - - - - ns OE0 to any Y (HC137) tPLH, tPHL CL = 50pF 4.5 - - 35 - 44 - 53 ns OE0 to any Y (HC237) tPLH, tPHL CL = 50pF 4.5 - - 33 - 41 - 60 ns OE1 to any Y (HC137) tTLH, tTHL CL = 50pF 4.5 - - 37 - 46 - 56 ns OE1 to any Y (HC237) tTLH, tTHL CL = 50pF 4.5 - - 35 - 44 - 53 ns LE to any Y (HC137) tTLH, tTHL CL = 50pF 4.5 - - 44 - 55 - 66 ns LE to any Y (HC237) tTLH, tTHL CL = 50pF 4.5 - - 42 - 53 - 63 ns Power Dissipation Capacitance, (Notes 3, 4) CD74HC137 CPD CL = 15pF 5 - 19 - - - - - pF ’HC237 CPD CL = 15pF 5 - 23 - - - - - pF Output Transition Time tTLH, tTHL CL = 50pF 4.5 15 19 22 ns Input Capacitance CI - - - - 10 - 10 - 10 pF NOTES: 3. CPD is used to determine the dynamic power consumption, per gate. 4. PD = VCC 2 f i (CPD + CL) where: fi = Input Frequency, CL = Output Load Capacitance, VCC = Supply Voltage. Switching Specifications Input tr, tf = 6ns (Continued) PARAMETER SYMBOL TEST CONDITIONS VCC (V) 25oC -40oC TO 85oC -55oC TO 125oC UNITS MIN TYP MAX MIN MAX MIN MAX Test Circuits and Waveforms NOTE: Outputs should be switching from 10% VCC to 90% VCC in accordance with device truth table. For fMAX, input duty cycle = 50%. FIGURE 1. HC CLOCK PULSE RISE AND FALL TIMES AND PULSE WIDTH NOTE: Outputs should be switching from 10% VCC to 90% VCC in accordance with device truth table. For fMAX, input duty cycle = 50%. FIGURE 2. HCT CLOCK PULSE RISE AND FALL TIMES AND PULSE WIDTH FIGURE 3. HC AND HCU TRANSITION TIMES AND PROPAGA- TION DELAY TIMES, COMBINATION LOGIC FIGURE 4. HCT TRANSITION TIMES AND PROPAGATION DELAY TIMES, COMBINATION LOGIC CLOCK 90% 50% 10% GND VCC trCL tfCL 50% 50% tWL tWH 10% tWL + tWH = fCL I CLOCK 2.7V 1.3V 0.3V GND 3V trCL = 6ns tfCL = 6ns 1.3V 1.3V tWL tWH 0.3V tWL + tWH = fCL I tPHL tPLH tTHL tTLH 90% 50% 10% 50% 10% INVERTING OUTPUT INPUT GND VCC tr = 6ns tf = 6ns 90% tPHL tPLH tTHL tTLH 2.7V 1.3V 0.3V 1.3V 10% INVERTING OUTPUT INPUT GND 3V tr = 6ns tf = 6ns 90% CD74HC137, CD74HCT137, CD54HC237, CD74HC237, CD74HCT237 |
Nº de peça semelhante - CD54HC237 |
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Descrição semelhante - CD54HC237 |
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