The 74HC192 is 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).
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 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.
Features:-
- 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
- HC Types
- 2V to 6V Operation
- High Noise Immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V
- HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility, VIL = 0.8V (Max), VIH = 2V (Min)
- CMOS Input Compatibility, Il
1µA at VOL, VOH
| Parameter | Specification |
| Part Number | CD74HC192 |
| 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 |
| Rating | See Data Sheet |
| Function | Counter |
| Type | Decade |
| Operating Temperature © | -55 to 125 |
| Package Group | PDIP|16 |
* product image for illustration purposes only. actual product may vary.
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