SN74LS192N Up Down Decade Counter With Clear

The SN74LS192N, SN74HC192N and SN74192 are a synchronously 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). A high level on 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 count is reached and returns to a high level at the zero count.

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 15 in the 193) 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. If a decade counter is preset to an illegal state or assumes an illegal state when power is applied, it will return to the normal sequence in one count as shown in state diagram.

Features:

Synchronous Up/Down BCD Decade Counter, Count is Updated with Low-to-High Clock Transition

Synchronous Counting

High Speed up to 25MHz

Individual Preset Inputs

Standard TTL Switching Voltages

Packing List:

1Pc * SN74LS192N Up Down Decade Counter With Clear