Overview
The 74HC573PW, produced by NXP USA Inc. (now part of Nexperia), is an 8-bit D-type transparent latch with 3-state outputs. This high-speed Si-gate CMOS device is designed for bus-oriented applications and is pin compatible with Low-power Schottky TTL (LSTTL). It features separate D-type inputs for each latch and a common latch enable (LE) and output enable (OE) input.
When the LE input is HIGH, the latches are transparent, allowing the output to change state each time its corresponding D input changes. When LE is LOW, the latches store the information present at the D inputs a set-up time preceding the HIGH-to-LOW transition of LE. The OE input controls the output state, with a HIGH on OE causing the outputs to assume a high-impedance OFF-state.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| VCC | 2.0 - 6.0 | V |
| Logic Switching Levels | CMOS | |
| Output Drive Capability | ± 7.8 | mA |
| Propagation Delay (tpd) | 14 | ns |
| Operating Temperature (Tamb) | -40°C to +125°C | |
| Input Capacitance (CI) | 3.5 | pF |
| Package Type | TSSOP20 (SOT360-1) | |
| Thermal Resistance (Rth(j-a)) | 100 K/W | |
| ESD Protection | HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V, CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V |
Key Features
- 8-bit D-type transparent latch with 3-state outputs
- Common latch enable (LE) and output enable (OE) inputs
- Transparent mode when LE is HIGH, and data storage when LE is LOW
- High-impedance OFF-state when OE is HIGH
- Inputs include clamp diodes for voltage protection
- Pin compatible with Low-power Schottky TTL (LSTTL)
- Complies with JEDEC standards and has robust ESD protection
- Multiple package options, including TSSOP20
- Operating temperature range from -40°C to +125°C
Applications
The 74HC573PW is useful in various applications, including:
- Input or output ports for microprocessors and microcomputers
- Bus-oriented applications due to its 3-state non-inverting outputs
- Interface with microprocessors and other digital circuits
- General-purpose latching and data storage in digital systems
Q & A
- What is the primary function of the 74HC573PW?
The primary function of the 74HC573PW 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 for the 74HC573PW are CMOS.
- How does the latch enable (LE) input affect the latches?
When LE is HIGH, the latches are transparent, allowing the output to change state each time its corresponding D input changes. When LE is LOW, the latches store the information present at the D inputs.
- What is the effect of the output enable (OE) input on the outputs?
A HIGH on the OE input causes the outputs to assume a high-impedance OFF-state.
- What is the operating temperature range of the 74HC573PW?
The operating temperature range is from -40°C to +125°C.
- What type of ESD protection does the 74HC573PW have?
The 74HC573PW has ESD protection exceeding 2000 V (HBM) and 1000 V (CDM).
- What package types are available for the 74HC573PW?
The 74HC573PW is available in TSSOP20 (SOT360-1) package among others.
- What is the propagation delay of the 74HC573PW?
The propagation delay (tpd) is 14 ns.
- What is the output drive capability of the 74HC573PW?
The output drive capability is ± 7.8 mA.
- What are some common applications of the 74HC573PW?
Common applications include input or output ports for microprocessors, bus-oriented applications, and general-purpose latching in digital systems.
