Overview
The 74HC373DB,118, produced by Nexperia USA Inc., is an octal D-type transparent latch with 3-state outputs. This integrated circuit is part of the 74HC and 74HCT series, known for their wide supply voltage range and low power dissipation. The device features latch enable (LE) and output enable (OE) inputs, allowing for flexible control over data storage and output states. When the LE input is HIGH, the latches are transparent, and the output will change with each change in the corresponding D-input. When LE is LOW, the latches store the information present at the inputs before the transition. A HIGH on the OE input causes the outputs to assume a high-impedance OFF-state without affecting the latch state.
Key Specifications
| Parameter | Description | Min | Typ | Max |
|---|---|---|---|---|
| VCC (Supply Voltage) | Operating voltage range | 2.0 V | - | 6.0 V |
| ICC (Supply Current) | At VCC = 6.0 V, IO = 0 A, VI = VCC or GND | - | 80 μA | 160 μA |
| CI (Input Capacitance) | - | - | 3.5 pF | - |
| VIH (HIGH-level Input Voltage) | At VCC = 4.5 V to 5.5 V | 2.0 V | - | - |
| VIL (LOW-level Input Voltage) | At VCC = 4.5 V to 5.5 V | - | 0.8 V | - |
| VOH (HIGH-level Output Voltage) | At IO = -6.0 mA, VCC = 4.5 V | 3.7 V | - | - |
| VOL (LOW-level Output Voltage) | At IO = 6.0 mA, VCC = 4.5 V | - | 0.4 V | - |
| II (Input Leakage Current) | At VI = VCC or GND, VCC = 5.5 V | - | ±1.0 μA | - |
| Package | - | - | SSOP20 (SOT339-1) | - |
| Operating Temperature Range | - | -40 °C | - | +85 °C / +125 °C |
Key Features
- Wide supply voltage range from 2.0 V to 6.0 V
- CMOS low power dissipation
- High noise immunity
- Latch-up performance exceeds 100 mA per JESD 78 Class II Level B
- 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
- 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
Applications
The 74HC373DB is suitable for a variety of applications requiring data storage and output control, such as:
- Bus-oriented systems where 3-state outputs are necessary
- Digital logic circuits requiring transparent latches
- Systems needing low power consumption and high noise immunity
- Automotive and industrial control systems due to its wide operating temperature range
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, allowing for data storage and output control.
- What is the supply voltage range for the 74HC373DB?
The supply voltage range for the 74HC373DB is from 2.0 V to 6.0 V.
- What are the key inputs and their functions?
The key inputs are the latch enable (LE) and output enable (OE). LE controls the transparency and storage of the latches, while OE controls the output state.
- What is the significance of the 3-state outputs?
The 3-state outputs allow the device to be used in bus-oriented applications, enabling the outputs to be in a high-impedance state when not in use.
- What are the ESD protection levels for the 74HC373DB?
The device has ESD protection exceeding 2000 V for HBM (Human Body Model) and 1000 V for CDM (Charged Device Model).
- What is the operating temperature range for the 74HC373DB?
The operating temperature range is from -40 °C to +85 °C, with some versions specified up to +125 °C.
- What are the typical applications for the 74HC373DB?
Typical applications include bus-oriented systems, digital logic circuits, and automotive and industrial control systems.
- What is the package type for the 74HC373DB,118?
The package type is SSOP20 (SOT339-1).
- Does the 74HC373DB comply with any specific standards?
Yes, it complies with JEDEC standards: JESD8C (2.7 V to 3.6 V) and JESD7A (2.0 V to 6.0 V).
- What is the significance of the latch-up performance?
The latch-up performance exceeds 100 mA per JESD 78 Class II Level B, indicating high reliability against latch-up conditions.
