Encyclopedia Entry: 74VHC373SJX

Product Overview

Category

The 74VHC373SJX belongs to the category of integrated circuits (ICs) and specifically falls under the family of VHC logic devices.

Use

This IC is commonly used in digital electronic systems for data storage and transfer applications. It serves as an octal transparent latch with 3-state outputs.

Characteristics

• High-speed operation: The 74VHC373SJX offers fast switching times, making it suitable for high-performance applications.
• Low power consumption: This IC is designed to operate efficiently with low power requirements.
• Wide operating voltage range: It can function within a voltage range of 2.0V to 5.5V, providing flexibility in various electronic systems.
• Output drive capability: The device has a strong output drive capability, enabling it to interface with other components effectively.

Package and Quantity

The 74VHC373SJX is available in a small outline package (SOP) with 20 pins. It is typically sold in reels or tubes, containing a quantity of 250 or 2,500 units per package.

Specifications

• Supply Voltage Range: 2.0V to 5.5V
• Input Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Output Current: ±6mA
• Propagation Delay Time: 4.5ns (typical)
• Output Capacitance: 8pF (typical)

Pin Configuration

The 74VHC373SJX features a 20-pin SOP package with the following pin configuration:

┌───┬───┐ D0 ─┤1 20├─ VCC D1 ─┤2 19├─ D7 D2 ─┤3 18├─ D6 D3 ─┤4 17├─ D5 D4 ─┤5 16├─ D4 GND ─┤6 15├─ OE# LE ─┤7 14├─ Q0 DQ ─┤8 13├─ Q1 CP ─┤9 12├─ Q2 GND ─┤10 11├─ Q3 └─────┘

Functional Features

The 74VHC373SJX offers the following functional features:

• Octal transparent latch: It can store and hold eight bits of data, which can be latched or transparently passed through based on the control inputs.
• 3-state outputs: The IC provides three-state outputs, allowing multiple devices to share a common bus without interference.
• Latch enable (LE) input: This input controls the latching function, enabling or disabling the storage of data.
• Output enable (OE#) input: When activated, it enables the outputs, allowing the stored data to be transferred to the output pins.

Advantages and Disadvantages

Advantages

• High-speed operation allows for efficient data transfer in time-critical applications.
• Low power consumption makes it suitable for battery-powered devices.
• Wide operating voltage range provides compatibility with various electronic systems.
• Strong output drive capability ensures reliable interfacing with other components.

Disadvantages

• Limited number of output pins restricts the number of devices that can be connected directly.
• Requires external control signals (LE and OE#) for proper operation, increasing complexity in circuit design.

Working Principles

The 74VHC373SJX operates based on the principles of digital logic. When the latch enable (LE) input is active, the data inputs (D0-D7) are latched and stored internally. The stored data can be transparently passed through to the outputs (Q0-Q3) or held in the latch, depending on the state of the control inputs.

The output enable (OE#) input controls whether the stored data is transferred to the output pins. When OE# is active, the outputs are enabled, allowing the stored data to appear at the output pins. Conversely, when OE# is inactive, the outputs are disabled, entering a high-impedance state.

Application Field Plans

The 74VHC373SJX finds applications in various digital electronic systems, including but not limited to:

1. Microprocessors and microcontrollers
2. Memory systems
3. Data communication devices
4. Industrial automation equipment
5. Automotive electronics
6. Consumer electronics

Its ability to store and transfer data efficiently makes it suitable for use in these fields, where reliable data handling is