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Specifications
SKU: 9900969
IC FF D-TYPE DUAL 1BIT 14DIP
| Parameter | 74HC74N (D Flip-Flop) | 74HC652 (8-Bit Bus Transceiver) |
|---|---|---|
| Function | Dual D-type Flip-Flop with Clear and Preset | 8-Bit Bus Transceiver with Three-State Outputs |
| Supply Voltage (Vcc) | 2V to 6V | 2V to 6V |
| Input Voltage (VIH, VIL) | VIH: 3.15V to Vcc, VIL: 0V to 0.8V | VIH: 3.15V to Vcc, VIL: 0V to 0.8V |
| Output Voltage (VOH, VOL) | VOH: Vcc - 0.1V, VOL: 0.1V | VOH: Vcc - 0.1V, VOL: 0.1V |
| Propagation Delay (tpd) | 7ns (max) @ Vcc = 5V, TA = 25°C | 10ns (max) @ Vcc = 5V, TA = 25°C |
| Power Dissipation (PD) | 10mW (max) per gate @ Vcc = 5V, TA = 25°C | 20mW (max) @ Vcc = 5V, TA = 25°C |
| Operating Temperature Range (TA) | -40°C to 85°C | -40°C to 85°C |
| Storage Temperature Range (Tstg) | -65°C to 150°C | -65°C to 150°C |
| Package | DIP-14, SOIC-14 | DIP-20, SOIC-20 |
| Pins | 14 | 20 |
Instructions for 74HC74N (D Flip-Flop)
- Power Supply: Connect Vcc to the positive supply voltage (2V to 6V) and GND to ground.
- Inputs:
- D1, D2: Data inputs for the two flip-flops.
- CP1, CP2: Clock inputs for the two flip-flops.
- CLR1, CLR2: Active-low asynchronous clear inputs.
- PR1, PR2: Active-low asynchronous preset inputs.
- Outputs:
- Q1, Q2: Non-inverted outputs.
- Q1B, Q2B: Inverted outputs.
- Operation:
- The flip-flops are triggered on the rising edge of the clock signal.
- When CLR is low, the output is forced to 0 regardless of the clock or data input.
- When PR is low, the output is forced to 1 regardless of the clock or data input.
Instructions for 74HC652 (8-Bit Bus Transceiver)
- Power Supply: Connect Vcc to the positive supply voltage (2V to 6V) and GND to ground.
- Inputs:
- A1-A8: Input bus A.
- B1-B8: Input bus B.
- DIR: Direction control input (high for A to B, low for B to A).
- OE: Output enable input (active low).
- Outputs:
- Y1-Y8: Output bus.
- Operation:
- When DIR is high and OE is low, data from bus A is transferred to bus Y.
- When DIR is low and OE is low, data from bus B is transferred to bus Y.
- When OE is high, all outputs are in high-impedance state (tristate).
Notes
- Ensure that all unused inputs are tied to a known logic level (either Vcc or GND) to prevent floating inputs.
- Use appropriate decoupling capacitors (e.g., 0.1μF ceramic) close to the power pins to reduce noise and improve stability.
Inquiry - 74HC74N,652
