Texas Instruments 74HCT series, SN74HCT74DT, D-Type flip-flop, dual 1-bit, positive-edge triggered, complementary outputs, set/preset and reset, 46 MHz clock, 4.5V–5.5V supply, -40°C to 85°C, 14-SOIC surface mount.
| Parameter | Value |
|---|---|
| Type | D-Type |
| Series | 74HCT |
| Output type | Complementary |
| Trigger type | Positive Edge |
| Mounting | Surface Mount |
| Supply voltage | 4.5V ~ 5.5V |
| Current - quiescent | 4 µA |
| Current - output high, low | 4mA, 4mA |
| Clock frequency | 46 MHz |
| Operating temperature | -40°C ~ 85°C (TA) |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Function | Set(Preset) and Reset |
| Case | 14-SOIC (0.154\", 3.90mm Width) |
| Input capacitance | 3 pF |
| Number of elements | 2 |
| Number of bits per element | 1 |
| Max propagation delay @ v, max CL | 25ns @ 5.5V, 50pF |
The SN74HCT74DT is a dual positive-edge-triggered D-type flip-flop with set and reset inputs, complementary outputs, two elements, and a 46 MHz clock.
ROHS3 compliant.
Both are dual D-type flip-flops in 14-SOIC with the same pinout. The HCT variant (SN74HCT74DT) accepts TTL-level input voltages directly, while the HC variant (SN74HC74D) expects CMOS-level inputs. If your upstream logic is 5 V TTL (e.g., 74LS or 74ALS), the HCT version avoids a level-shifter.
Maximum clock frequency is 46 MHz. Maximum propagation delay is 25 ns at 5.5 V supply into a 50 pF load. These numbers define the timing closure window for synchronous designs.