Overview
The 74HC573PW/AUJ, produced by NXP USA Inc., is an 8-bit D-type transparent latch with 3-state outputs. This device is part of the 74HC series, known for its high-speed CMOS logic. It features latch enable (LE) and output enable (OE) inputs, allowing for precise control over data latching and output states. When the latch enable (LE) is HIGH, the latches are transparent, and the output will change each time its corresponding D-input changes. When LE is LOW, the latches store the information that was present at the inputs a set-up time preceding the HIGH-to-LOW transition of LE. A HIGH on the output enable (OE) causes the outputs to assume a high-impedance OFF-state, which does not affect the state of the latches.
Key Specifications
| Type Number | VCC (V) | Logic Switching Levels | Output Drive Capability (mA) | tpd (ns) | Power Dissipation Considerations | Tamb (°C) | Rth(j-a) (K/W) | Ψth(j-top) (K/W) | Rth(j-c) (K/W) | Package Name |
|---|---|---|---|---|---|---|---|---|---|---|
| 74HC573PW | 2.0 - 6.0 | CMOS | ± 7.8 | 14 | Low | -40 ~ 125 | 100 | 4.6 | 44.9 | TSSOP20 |
Key Features
- 8-bit D-type transparent latch with 3-state outputs
- Latch enable (LE) and output enable (OE) inputs for control over data latching and output states
- CMOS logic switching levels for the 74HC573PW
- Inputs include clamp diodes to enable the use of current limiting resistors for interfacing with voltages in excess of VCC
- Inputs and outputs on opposite sides of the package for easy interface with microprocessors
- Useful as input or output port for microprocessors and microcomputers
- 3-state non-inverting outputs for bus-oriented applications
- Complies with JEDEC standards for ESD protection: HBM ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V, CDM ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V
- Latch-up performance exceeds 100 mA per JESD 78 Class II Level B
Applications
- Input or output ports for microprocessors and microcomputers
- Bus-oriented applications requiring 3-state non-inverting outputs
- General-purpose latching and data storage in digital systems
- Interface circuits where data needs to be latched and controlled
Q & A
- What is the primary function of the 74HC573PW/AUJ?
The primary function is to act as an 8-bit D-type transparent latch with 3-state outputs.
- What are the logic switching levels for the 74HC573PW?
The logic switching levels are CMOS.
- How does the latch enable (LE) input affect the device?
When LE is HIGH, the latches are transparent, and when LE is LOW, the latches store the information that was present at the inputs.
- What is the effect of a HIGH on the output enable (OE) input?
A HIGH on OE causes the outputs to assume a high-impedance OFF-state.
- What are the ESD protection levels for this device?
The device complies with JEDEC standards for ESD protection: HBM ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V, CDM ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V.
- What is the operating temperature range for the 74HC573PW?
The operating temperature range is from -40 °C to +125 °C.
- What package type is the 74HC573PW available in?
The device is available in a TSSOP20 package.
- What are some common applications for this device?
Common applications include input or output ports for microprocessors and microcomputers, and bus-oriented applications.
- Does the device include any special features for input protection?
Yes, the inputs include clamp diodes to enable the use of current limiting resistors for interfacing with voltages in excess of VCC.
- What is the latch-up performance of the 74HC573PW?
The latch-up performance exceeds 100 mA per JESD 78 Class II Level B.
