Overview
The 74HCT373DB is an octal D-type transparent latch with 3-state outputs, manufactured by NXP Semiconductors. This integrated circuit is part of the HCT logic family and is designed for use in various electronic systems that require high-speed data buffering and storage. The device features latch enable (LE) and output enable (OE) inputs, allowing for flexible control over data storage and output states. It is particularly suited for bus-oriented applications due to its 3-state non-inverting outputs.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | NXP Semiconductors |
| Package/Case | SSOP-20 |
| Logic Type | TTL |
| Logic Family | HCT |
| Polarity | Non-Inverting |
| Number of Output Lines | 8 |
| High Level Output Current | -6 mA |
| Propagation Delay Time | 14 ns |
| Supply Voltage Max | 5.5 V |
| Supply Voltage Min | 4.5 V |
| Maximum Operating Temperature | +125 °C |
| Minimum Operating Temperature | -40 °C |
| Mounting Style | SMD/SMT |
| Number of Input Lines | 8 |
| RoHS Status | Lead free / RoHS Compliant |
Key Features
- Wide supply voltage range from 4.5 V to 5.5 V, with compatibility up to 6.0 V for certain configurations.
- CMOS low power dissipation, ensuring energy efficiency in operation.
- High noise immunity, enhancing the reliability of the device in noisy environments.
- Latch-up performance exceeds 100 mA per JESD 78 Class II Level B, providing robust protection against latch-up conditions.
- Complies with JEDEC standards: JESD8C (2.7 V to 3.6 V) and JESD7A (2.0 V to 6.0 V).
- 3-state non-inverting outputs for bus-oriented applications, with a common 3-state output enable input.
- ESD protection: HBM (ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V) and CDM (ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V).
- Multiple package options, including SSOP-20, to suit various design requirements.
- Specified operation from -40 °C to +125 °C, ensuring reliability across a wide temperature range.
Applications
The 74HCT373DB is used in a variety of applications where high-speed data buffering and storage are critical. These include:
- Data storage systems: The device's ability to store and buffer data makes it suitable for data storage applications.
- Communication systems: Its high-speed operation and 3-state outputs make it ideal for communication systems that require efficient data transfer.
- Data management systems: The device is used in systems that require the management and buffering of data, such as in computing and networking equipment.
Q & A
- Q: What is the primary function of the 74HCT373DB?
A: The 74HCT373DB is an octal D-type transparent latch with 3-state outputs, designed for high-speed data buffering and storage.
- Q: What are the key inputs and outputs of the 74HCT373DB?
A: The device has 8 input lines, 8 output lines, a latch enable (LE) input, and an output enable (OE) input.
- Q: What is the operating temperature range of the 74HCT373DB?
A: The device operates from -40 °C to +125 °C.
- Q: What is the supply voltage range for the 74HCT373DB?
A: The supply voltage range is from 4.5 V to 5.5 V, with compatibility up to 6.0 V for certain configurations.
- Q: Does the 74HCT373DB have ESD protection?
A: Yes, the device has ESD protection: HBM (ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V) and CDM (ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V).
- Q: What are the package options available for the 74HCT373DB?
A: The device is available in SSOP-20 package among other options.
- Q: Is the 74HCT373DB RoHS compliant?
A: Yes, the device is lead free and RoHS compliant.
- Q: What are the typical applications of the 74HCT373DB?
A: The device is used in data storage systems, communication systems, and data management systems.
- Q: How does the latch enable (LE) input function in the 74HCT373DB?
A: When LE is HIGH, data at the inputs enter the latches, making the latches transparent. When LE is LOW, the latches store the information present at the inputs a set-up time preceding the HIGH-to-LOW transition of LE.
- Q: What is the effect of the output enable (OE) input on the 74HCT373DB?
A: A HIGH on OE causes the outputs to assume a high-impedance OFF-state, but it does not affect the state of the latches.
