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CD74HC299ME4 Fiches technique(PDF) 7 Page - Texas Instruments |
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CD74HC299ME4 Fiches technique(HTML) 7 Page - Texas Instruments |
7 / 17 page 7 HCT TYPES Propagation Delay tPHL, tPLH Clock to I/O Output, Clock to Q0 and Q7 CL = 50pF 4.5 - - 45 - 56 - 68 ns CL = 15pF 5 - 19 - - - - - ns MR to Output tPHL, tPLH CL = 50pF 4.5 - - 46 - 58 - 69 ns Output Enable and Disable Times tPZL,tPZH, tPLZ, tPHZ CL = 15pF 5 - 10, 13, 15 -- - - - ns Output High-Z to High Level tPZH CL = 50pF 4.5 - - 32 - 40 - 48 ns Output High Level to High-Z tPHZ CL = 50pF 4.5 - - 37 - 46 - 56 ns Output Low Level to High-Z tPLZ CL = 50pF 4.5 - - 32 - 40 - 48 ns Output High-Z to Low Level tPZL CL = 50pF 4.5 - - 30 - 38 - 45 ns Output Transition Time tTLH, tTHL Q0, Q7 CL = 50pF 4.5 - - 15 - 19 - 22 ns I/O0 to I/O7 CL = 50pF 4.5 - - 12 - 15 - 18 ns Input Capacitance CIN CL = 50pF - 10 - 10 - 10 - 10 pF Three-State Output Capacitance CO - - 20 - 20 - 20 - 20 pF Power Dissipation Capacitance (Notes 3, 4) CPD CL = 15pF 5 - 170 - - - - - pF NOTES: 3. CPD is used to determine the dynamic power consumption, per register. 4. PD =CPD VCC 2 f i + ∑ (CL VCC 2 f O) where fi = Input Frequency, fO = Output Frequency, CL = Output Load Capacitance, VCC = Supply Voltage. Switching Specifications CL = 50pF, 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 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 CD54HC299, CD74HC299, CD54HCT299, CD74HCT299 |
Numéro de pièce similaire - CD74HC299ME4 |
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Description similaire - CD74HC299ME4 |
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