Overview
The SN74HC574NSR, produced by Texas Instruments, is an octal edge-triggered D-type flip-flop with 3-state outputs. This component is designed for bus driving and is particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. The flip-flops enter data on the low-to-high transition of the clock (CLK) input, and a buffered output-enable (OE) input allows the outputs to be placed in either a normal logic state or a high-impedance state.
Key Specifications
| Parameter | Unit | Min | Typ | Max |
|---|---|---|---|---|
| Supply Voltage (VCC) | V | 2 | 5 | 6 |
| Operating Free-Air Temperature (TA) | °C | -40 | 85 | |
| Clock Frequency (fclock) at VCC = 6 V | MHz | 24 | 38 | |
| Pulse Duration, CLK High or Low at VCC = 6 V | ns | 14 | 20 | |
| Setup Time, Data Before CLK↑ at VCC = 6 V | ns | 17 | 26 | |
| Hold Time, Data After CLK↑ at VCC = 6 V | ns | 5 | 5 | |
| Propagation Delay (tpd) at VCC = 6 V, CL = 50 pF | ns | 24 | 46 | |
| Output Drive at VCC = 5 V | mA | ±6 | ||
| Input Current at VCC = 6 V | µA | 1 | ||
| Supply Current (ICC) at VCC = 6 V | µA | 80 |
Key Features
- Wide operating voltage range of 2 V to 6 V.
- High-current 3-state noninverting outputs that can drive bus lines directly or up to 15 LSTTL loads.
- Low power consumption, with a maximum supply current (ICC) of 80 µA at 6 V.
- Typical propagation delay of 22 ns at 5 V.
- Output drive capability of ±6 mA at 5 V.
- Low input current of 1 µA maximum.
- Bus-structured pinout.
- Output-enable (OE) input to place outputs in high-impedance state.
Applications
The SN74HC574NSR is particularly suitable for various applications, including:
- Implementing buffer registers and working registers.
- Creating I/O ports and bidirectional bus drivers.
- Bus driving in digital systems where high-impedance states are necessary.
Q & A
- What is the operating voltage range of the SN74HC574NSR?
The operating voltage range is from 2 V to 6 V. - What is the maximum clock frequency at 6 V?
The maximum clock frequency at 6 V is 38 MHz. - What is the propagation delay at 6 V with a 50 pF load capacitance?
The propagation delay is between 24 ns and 46 ns. - Can the SN74HC574NSR drive bus lines directly?
Yes, it can drive bus lines directly or up to 15 LSTTL loads. - What is the maximum supply current at 6 V?
The maximum supply current is 80 µA. - What is the purpose of the output-enable (OE) input?
The OE input allows the outputs to be placed in either a normal logic state or a high-impedance state. - What are the typical applications of the SN74HC574NSR?
It is used for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. - Is the SN74HC574NSR RoHS compliant?
Yes, it is RoHS compliant. - What is the operating temperature range of the SN74HC574NSR?
The operating temperature range is from -40°C to 85°C. - What is the package type of the SN74HC574NSR?
The package type is Small Outline (SO) or Small Outline Plastic (SOP).
