Overview
The 74HC373DB,112 is an octal D-type transparent latch with 3-state outputs, manufactured by Nexperia USA Inc. This device is part of the 74HC373 and 74HCT373 series, which are designed for various logic applications. The 74HC373DB features latch enable (LE) and output enable (OE) inputs, allowing for flexible control over data storage and output states.
When the latch enable (LE) input 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) input causes the outputs to assume a high-impedance OFF-state, without affecting the state of the latches.
Key Specifications
| Parameter | Value | Description |
|---|---|---|
| Type Number | 74HC373DB | Octal D-type transparent latch with 3-state outputs |
| VCC (V) | 2.0 - 6.0 | Supply voltage range |
| Logic Switching Levels | CMOS | For 74HC373; TTL for 74HCT373 |
| Output Drive Capability (mA) | ± 7.8 | Maximum output current |
| tpd (ns) | 12 | Propagation delay time |
| Power Dissipation | Low | CMOS low power dissipation |
| Tamb (°C) | -40 to +125 | Operating temperature range |
| Package | SSOP20 (SOT339-1) | Package type and dimensions |
| ESD Protection | HBM: >2000 V, CDM: >1000 V | Electrostatic discharge protection levels |
Key Features
- Wide Supply Voltage Range: Operates from 2.0 V to 6.0 V.
- CMOS Low Power Dissipation: Low power consumption.
- High Noise Immunity: Enhanced noise immunity for reliable operation.
- Latch-up Performance: Exceeds 100 mA per JESD 78 Class II Level B.
- 3-State Non-Inverting Outputs: Suitable for bus-oriented applications.
- Common 3-State Output Enable Input: Allows for easy control of output states.
- ESD Protection: HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V, CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V.
- Multiple Package Options: Available in various packages including SSOP20.
Applications
- Bus-Oriented Systems: Ideal for applications requiring 3-state outputs to manage data buses.
- Memory and Storage Systems: Used in memory and storage systems where data needs to be latched and stored.
- Digital Logic Circuits: Suitable for various digital logic circuits requiring transparent latches.
- Embedded Systems: Can be used in embedded systems where low power consumption and high noise immunity are crucial.
Q & A
- What is the primary function of the 74HC373DB?
The primary function of the 74HC373DB is to act as an octal D-type transparent latch with 3-state outputs.
- What is the supply voltage range for the 74HC373DB?
The supply voltage range is from 2.0 V to 6.0 V.
- What are the logic switching levels for the 74HC373DB?
The logic switching levels are CMOS for the 74HC373 and TTL for the 74HCT373.
- How does the latch enable (LE) input work?
When LE is HIGH, the latches are transparent, and when LE is LOW, the latches store the information present at the inputs.
- What is the effect of the output enable (OE) input?
A HIGH on the OE input causes the outputs to assume a high-impedance OFF-state without affecting the state of the latches.
- What is the ESD protection level for the 74HC373DB?
The ESD protection level is HBM: >2000 V and CDM: >1000 V.
- In what temperature range can the 74HC373DB operate?
The operating temperature range is from -40 °C to +125 °C.
- What package options are available for the 74HC373DB?
The device is available in SSOP20 (SOT339-1) package among others.
- Is the 74HC373DB still in production?
No, the 74HC373DB,112 is listed as withdrawn/end-of-life.
- What are some common applications for the 74HC373DB?
Common applications include bus-oriented systems, memory and storage systems, digital logic circuits, and embedded systems.
