Overview
The SN74AC74PWRG4 is a dual positive-edge-triggered D-type flip-flop integrated circuit produced by Texas Instruments. This device is part of the 74AC series, known for its high-speed and low-power consumption. It operates within a voltage range of 2V to 6V, making it versatile for various digital circuit applications. The SN74AC74PWRG4 is available in a TSSOP (Thin Shrink Small Outline Package) with 14 pins, offering a compact solution for space-constrained designs.
Key Specifications
| Parameter | Unit | Min | Typ | Max |
|---|---|---|---|---|
| Supply Voltage (VCC) | V | 2 | 6 | |
| High-Level Input Voltage (VIH) | V | 2.1 (VCC=3V), 3.15 (VCC=4.5V), 3.85 (VCC=5.5V) | ||
| Low-Level Input Voltage (VIL) | V | 0.9 (VCC=3V), 1.35 (VCC=4.5V), 1.65 (VCC=5.5V) | ||
| Clock Frequency (fclock) at VCC=5V | MHz | 95 | 140 | |
| Propagation Delay Time (tPLH) at VCC=5V | ns | 2.5 | 6 | 10 |
| Setup Time (tsu) at VCC=5V | ns | 3 | 4 | |
| Hold Time (th) at VCC=5V | ns | 0.5 | 0.5 | |
| Junction-to-Ambient Thermal Resistance (RθJA) | °C/W | 145.7 |
Key Features
- Dual positive-edge-triggered D-type flip-flops.
- Operates over a wide voltage range from 2V to 6V.
- High-speed operation with a maximum clock frequency of up to 140 MHz at VCC=5V.
- Low power consumption with ICC as low as 20 µA at VCC=5.5V.
- Inputs accept voltages up to 6V, making it compatible with various logic levels.
- Available in TSSOP (Thin Shrink Small Outline Package) for compact designs.
Applications
The SN74AC74PWRG4 is suitable for a variety of digital circuit applications, including:
- High-speed digital counters and dividers.
- Shift registers and data storage circuits.
- Sequential logic circuits requiring low power consumption.
- General-purpose digital logic circuits in automotive, industrial, and consumer electronics.
Q & A
- What is the voltage range for the SN74AC74PWRG4? The SN74AC74PWRG4 operates within a voltage range of 2V to 6V.
- What is the maximum clock frequency of the SN74AC74PWRG4 at VCC=5V? The maximum clock frequency is up to 140 MHz.
- What is the typical propagation delay time at VCC=5V? The typical propagation delay time is around 6 ns.
- What is the recommended bypass capacitor for the power supply? A 0.1-μF capacitor is recommended, and it is acceptable to parallel multiple bypass capacitors to reject different frequencies of noise.
- What are the package options for the SN74AC74? The SN74AC74 is available in several packages, including TSSOP (PW), SOIC (D), SSOP (DB), PDIP (N), and SOP (NS).
- What is the junction-to-ambient thermal resistance for the TSSOP package? The junction-to-ambient thermal resistance (RθJA) for the TSSOP package is 145.7°C/W.
- How should unused inputs be handled? Unused inputs should be tied to VCC or GND to prevent floating inputs.
- What are the layout guidelines for the SN74AC74? The layout should include a good bypass capacitor close to the power terminal, avoid 90° corners for signal lines, and use GND flood fill for improved signal isolation and noise reduction.
- Is the SN74AC74 RoHS compliant? Yes, the SN74AC74 in the TSSOP package is RoHS and Green compliant.
- What is the operating temperature range for the SN74AC74? The operating temperature range is -40°C to 85°C.
