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74F393 Datasheet(PDF) 5 Page - NXP Semiconductors |
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74F393 Datasheet(HTML) 5 Page - NXP Semiconductors |
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5 / 8 page 
Philips Semiconductors Product specification 74F393 Dual 4-bit binary ripple counter 1988 Nov 01 5 AC SETUP REQUIREMENTS LIMITS SYMBOL PARAMETER TEST CONDITION VCC = +5V Tamb = +25°C CL = 50pF, RL = 500Ω VCC = +5V ± 10% Tamb = 0°C to +70°C CL = 50pF, RL = 500Ω UNIT MIN TYP MAX MIN MAX tW(H) tW(L) CPn Pulse width High or Low Waveform 1 4.5 3.5 5.0 4.0 ns tW(H) MR Pulse width High Waveform 2 3.5 4.5 ns tREC Recovery time MR to CPn Waveform 2 2.5 3.0 ns AC WAVEFORMS For all waveforms, VM = 1.5V. VM VM VM 1/fMAX tPHL tw(L) Qna, Qnb tw(H) VM CPn tPLH SF00709 Waveform 1. Propagation Delay, Clock Input to Output, Clock Pulse Width, and Maximum Clock Frequency VM VM VM trec tPHL MR CPn Qna, Qnb VM tw(H) SF00708 Waveform 2. Master Reset Pulse Width, Master Reset to Output Delay, and Master Reset to Clock Recovery Time TEST CIRCUIT AND WAVEFORMS tw 90% VM 10% 90% VM 10% 90% VM 10% 90% VM 10% NEGATIVE PULSE POSITIVE PULSE tw AMP (V) 0V 0V tTHL (tf ) INPUT PULSE REQUIREMENTS rep. rate tw tTLH tTHL 1MHz 500ns 2.5ns 2.5ns Input Pulse Definition VCC family 74F D.U.T. PULSE GENERATOR RL CL RT VIN VOUT Test Circuit for Totem-Pole Outputs DEFINITIONS: RL = Load resistor; see AC ELECTRICAL CHARACTERISTICS for value. CL = Load capacitance includes jig and probe capacitance; see AC ELECTRICAL CHARACTERISTICS for value. RT = Termination resistance should be equal to ZOUT of pulse generators. tTHL (tf ) tTLH (tr ) tTLH (tr ) AMP (V) amplitude 3.0V 1.5V VM SF00006 |
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