Overview
The SN74AC74DR is a dual positive-edge-triggered D-type flip-flop produced by Texas Instruments. This component is part of the 74AC series, known for its high-speed and low-power CMOS logic. The device operates within a voltage range of 2V to 6V, making it versatile for various digital circuit applications. Each flip-flop has a clear, preset, clock, and data input, along with both normal and inverted output signals. This device is suitable for use in a wide range of digital systems requiring data storage and sequential logic operations.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VCC Operating Voltage | 2 | 6 | V | ||
| Clock Frequency (VCC = 3.3V) | 100 | 125 | 70 | MHz | |
| Clock Frequency (VCC = 5V) | 140 | 160 | 95 | MHz | |
| Setup Time (Data before CLK↑, VCC = 3.3V) | 4 | 5 | ns | ||
| Setup Time (Data before CLK↑, VCC = 5V) | 3 | 4 | ns | ||
| Hold Time (Data after CLK↑) | 0.5 | 0.5 | ns | ||
| Propagation Delay (CLK to Q, VCC = 3.3V) | 4.5 | 13.5 | ns | ||
| Propagation Delay (CLK to Q, VCC = 5V) | 3.5 | 10 | ns | ||
| Operating Temperature | -40 | 85 | °C | ||
| Package Type | SOIC-14 |
Key Features
- Dual positive-edge-triggered D-type flip-flops
- Operates over a voltage range of 2V to 6V
- High-speed operation with clock frequencies up to 160 MHz at VCC = 5V
- Low power consumption with ICC of 20 µA at VCC = 5V
- Inputs accept voltages up to 6V
- Clear and preset inputs are active low
- Available in various package types including SOIC, SSOP, PDIP, and TSSOP
Applications
- Digital counters and dividers
- Shift registers and data storage circuits
- Sequential logic circuits
- Timing and control circuits
- General-purpose digital systems requiring flip-flop functionality
Q & A
- What is the operating voltage range of the SN74AC74DR?
The SN74AC74DR operates within a voltage range of 2V to 6V.
- What is the maximum clock frequency for the SN74AC74DR at VCC = 5V?
The maximum clock frequency at VCC = 5V is 160 MHz.
- What is the propagation delay from CLK to Q at VCC = 3.3V?
The propagation delay from CLK to Q at VCC = 3.3V is typically 4.5 ns to 13.5 ns.
- What are the clear and preset input characteristics?
The clear and preset inputs are active low.
- What are the available package types for the SN74AC74DR?
The SN74AC74DR is available in SOIC, SSOP, PDIP, and TSSOP package types.
- What is the operating temperature range for the SN74AC74DR?
The operating temperature range is -40°C to 85°C.
- What is the power dissipation capacitance at VCC = 3.3V?
The power dissipation capacitance at VCC = 3.3V is typically 45 pF.
- Can the inputs accept voltages higher than VCC?
Yes, the inputs can accept voltages up to 6V.
- What is the typical current consumption at VCC = 5V?
The typical current consumption at VCC = 5V is 20 µA.
- What are some common applications of the SN74AC74DR?
Common applications include digital counters, shift registers, sequential logic circuits, and general-purpose digital systems.
