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Decade Up/Down Counter with Clear IC - 74HC192

Decade Up/Down Counter with Clear IC - 74HC192

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  • Synchronous Counting and Asynchronous Loading
  • Two Outputs for N-Bit Cascading
  • Look-Ahead Carry for High-Speed Counting
  • Fanout (Over Temperature Range)
    • Standard Outputs 10 LSTTL Loads
    • Bus Driver Outputs 15 LSTTL Loads
  • Wide Operating Temperature Range –55°C to 125°C
  • Balanced Propagation Delay and Transition Times
  • Significant Power Reduction Compared to LSTTL Logic ICs

Decade Up/Down Counter with Clear IC - 74HC192

The 74HC Series 74HC192 IC is an asynchronously presettable BCD Decade and Binary Up/Down synchronous counters, respectively. Presetting the counter to the number on the preset data inputs (P0-P3) is accomplished by a LOW asynchronous parallel load input (PL)\. The counter is incremented on the low-to-high transition of the Clock-Up input (and a high level on the Clock-Down input) and decremented on the low-to-high transition of the Clock-Down input (and a high level on the Clock-up input). 

check out : 4-Bit Binary Ripple Counter IC - 74HC93

A high level of the MR input overrides any other input to clear the counter to its zero state. The Terminal Count up (carry) goes low half a clock period before the zero counts are reached and returns to a high level at the zero counts. The Terminal Count Down (borrow) in the count down mode likewise goes low half a clock period before the maximum count (9 in the 192) and returns to high at the maximum count. Cascading is effected by connecting the carry and borrow outputs of a less significant counter to the Clock-Up and CLock-Down inputs, respectively, of the next most significant counter.

check out : CD4029 - Binary Decade Up-Down Counter IC


Pinout Of 74HC192 IC

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Part Number 74HC192
Technology Family HC
VCC (Min) (V) 2
VCC (Max) (V) 6
Bits (#) 4
Voltage (Nom) (V) 3.3, 5
F @ nom voltage (Max) (MHz) 28
ICC @ nom voltage (Max)(mA) 0.08
tpd @ nom Voltage (Max) (ns) 46
IOL (Max) (mA) 5.2
IOH (Max) (mA) -5.2
Function Counter
Type Decade
Operating Temperature © -55 to 125

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1.What is the purpose of the clear input on the 74HC192?

  • The clear input allows the counter to be reset to zero regardless of the current count value. This can be handy for initialising the counter or restarting a counting sequence.

2.How does the 74HC192 handle overflow or underflow conditions?

  • When the 74HC192 achieves its maximum count value (9), it will automatically reset to zero and begin counting again (overflow). If the counter reaches zero while counting down, it will automatically reset to the maximum count value (9) and continue counting from there (underflow).