SN54-74LS290 ONSEMI [ON Semiconductor], SN54-74LS290 Datasheet
SN54-74LS290
Related parts for SN54-74LS290
SN54-74LS290 Summary of contents
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... DECADE COUNTER; 4-BIT BINARY COUNTER The SN54 / 74LS290 and SN54 / 74LS293 are high-speed 4-bit ripple type counters partitioned into two sections. Each counter has a divide-by-two sec- tion and either a divide-by-five (LS290) or divide-by-eight (LS293) section which are triggered by a HIGH-to-LOW transition on the clock inputs. Each section can be used separately or tied together (Q to CP)to form BCD, Bi-quinary, or Modulo-16 counters ...
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... SN54/74LS293 PIN 14 GND = PIN PINS LS290 ...
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... BCD count HIGH Voltage Level L = LOW Voltage Level X = Don’t Care D SN54/74LS293 externally connected to the Q 0 output. The CP 0 input receives the incoming count and a BCD count sequence is produced. B. Symmetrical Bi-quinary Divide-By-Ten Counter — The Q 3 output must be externally connected to the CP 0 input. The input count is then applied to the CP 1 input and a divide-by-ten square wave is obtained at output Q 0 ...
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... SN54/74LS290 SN54/74LS293 GUARANTEED OPERATING RANGES Symbol Parameter V CC Supply Voltage T A Operating Ambient Temperature Range I OH Output Current — High I OL Output Current — Low DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE Symbol Parameter Input HIGH Voltage Input LOW Voltage ...
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... V t PHL Q *The number of Clock Pulses required between the t PHL and t PLH measurements can be determined from the appropriate Truth Tables. MR & MS 1 rec CP 1 PHL Q 1.3 V Figure 2 D SN54/74LS293 Limits LS290 Min Typ Max Min ...