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SN54LS293J Datasheet(PDF) 5 Page - Motorola, Inc |
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SN54LS293J Datasheet(HTML) 5 Page - Motorola, Inc |
5 / 7 page 5-470 FAST AND LS TTL DATA SN54/74LS290 D SN54/74LS293 AC CHARACTERISTICS (TA = 25°C, VCC = 5.0 V, CL = 15 pF) Symbol Parameter Limits Unit Symbol Parameter LS290 LS293 Unit Symbol Parameter Min Typ Max Min Typ Max Unit fMAX CP0 Input Clock Frequency 32 32 MHz fMAX CP1 Input Clock Frequency 16 16 MHz tPLH tPHL Propagation Delay, CP0 Input to Q0 Output 10 12 16 18 10 12 16 18 ns tPLH tPHL CP0 Input to Q3 Output 32 34 48 50 46 46 70 70 ns tPLH tPHL CP1 Input to Q1 Output 10 14 16 21 10 14 16 21 ns tPLH tPHL CP1 Input to Q2 Output 21 23 32 35 21 23 32 35 ns tPLH tPHL CP1 Input to Q3 Output 21 23 32 35 34 34 51 51 ns tPHL MS Input to Q0 and Q3 Outputs 20 30 ns tPHL MS Input to Q1 and Q2 Outputs 26 40 ns tPHL MR Input to Any Output 26 40 26 40 ns AC SETUP REQUIREMENTS (TA = 25°C, VCC = 5.0 V) Symbol Parameter Limits Unit Symbol Parameter LS290 LS293 Unit Symbol Parameter Min Max Min Max Unit tW CP0 Pulse Width 15 15 ns tW CP1 Pulse Width 30 30 ns tW MS Pulse Width 15 ns tW MR Pulse Width 15 15 ns trec Recovery Time MR to CP 25 25 ns RECOVERY TIME (trec) is defined as the minimum time required between the end of the reset pulse and the clock transition form HIGH-to-LOW in order to recognize and transfer HIGH data to the Q outputs. Figure 1 *CP Q 1.3 V 1.3 V 1.3 V 1.3 V tPHL tPLH Figure 2 Figure 3 1.3 V 1.3 V 1.3 V 1.3 V 1.3 V 1.3 V 1.3 V 1.3 V MR & MS CP Q tPHL tPLH MS CP Q0 ⋅ Q3 (LS290) *The number of Clock Pulses required between the tPHL and tPLH measurements can be determined from the appropriate Truth Tables. AC WAVEFORMS tW tW trec tW trec |
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