| Number of channels (#) | 2 |
| Technology Family | HCT |
| Supply voltage (Min) (V) | 4.5 |
| Supply voltage (Max) (V) | 5.5 |
| Input type | TTL |
| Output type | Push-Pull |
| Clock Frequency (MHz) | 24 |
| ICC (Max) (uA) | 40 |
| IOL (Max) (mA) | 6 |
| IOH (Max) (mA) | -6 |
| Features | Balanced outputs, Positive edge triggered, High speed (tpd 10-50ns), Positive input clamp diode, Preset, Clear |
- Asynchronous Set and Reset
- Schmitt Trigger Clock Inputs
- Typical fMAX = 54MHz at VCC = 5V, CL = 15pF, A = 25°C
- 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
The ?HC109 and ?HCT109 are dual J-K\ flip-flops with set and reset. The flip-flop changes state with the positive transition of Clock (1CP and 2CP).
The flip-flop is set and reset by active-low S\ and R\, respectively. A low on both the set and reset inputs simultaneously will force both Q and Q\ outputs high. However, both set and reset going high simultaneously results in an unpredictable output condition.