SN74LVC125APWE4

Overview

• Category: Integrated Circuit (IC)
• Use: Buffer/Driver
• Characteristics: Low Voltage CMOS Quad Bus Buffer with 3-State Outputs
• Package: TSSOP-14
• Essence: Provides voltage level shifting and signal buffering capabilities
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 1.65V to 5.5V
• Input Voltage Range: -0.5V to VCC + 0.5V
• Output Voltage Range: 0V to VCC
• Maximum Operating Frequency: 80 MHz
• Number of Channels: 4
• Output Drive Capability: ±24 mA
• Propagation Delay: 2.6 ns (typical)

Pin Configuration

The SN74LVC125APWE4 has a TSSOP-14 package with the following pin configuration:

__ __ Y1 | 1 14 | VCC Y2 | 2 13 | A1 GND | 3 12 | B1 A2 | 4 11 | Y3 B2 | 5 10 | GND Y4 | 6 9 | A3 OE# | 7 8 | B3 ‾‾ ‾‾

Functional Features

• Quad bus buffer with 3-state outputs
• Supports bidirectional data flow
• Provides voltage level shifting between different logic families
• Enables interfacing between devices operating at different voltage levels
• Offers high-speed operation with low power consumption
• 3-state outputs allow multiple devices to share a common bus

Advantages

• Wide supply voltage range allows compatibility with various systems
• Low power consumption makes it suitable for battery-powered applications
• High-speed operation enables efficient data transfer
• 3-state outputs provide flexibility in bus sharing scenarios
• Small package size saves board space

Disadvantages

• Limited output drive capability may not be suitable for high-current applications
• Propagation delay may impact timing-sensitive designs
• Not suitable for applications requiring high noise immunity

Working Principles

The SN74LVC125APWE4 is a buffer/driver IC that operates as a voltage level shifter and signal buffer. It takes input signals from one logic family and provides output signals compatible with another logic family. The device uses CMOS technology, allowing it to operate at low voltages while providing high-speed performance.

The quad bus buffer has four independent channels, each with a 3-state output. This allows multiple devices to share a common bus without interfering with each other. The 3-state outputs can be enabled or disabled using the OE# (Output Enable) pin.

When enabled, the SN74LVC125APWE4 amplifies and buffers the input signals, ensuring proper voltage levels and driving capability for downstream devices. When disabled, the outputs are in a high-impedance state, effectively disconnecting the device from the bus.

Detailed Application Field Plans

The SN74LVC125APWE4 finds applications in various fields, including:

1. Microcontroller interfacing: It facilitates communication between microcontrollers operating at different voltage levels.
2. Level shifting: It enables interfacing between devices with incompatible voltage levels, such as 3.3V and 5V systems.
3. Bus sharing: It allows multiple devices to share a common bus, enabling efficient data transfer in multi-device systems.
4. Signal buffering: It strengthens weak signals and provides sufficient drive capability for long-distance transmission.
5. Logic level conversion: It converts logic signals between different voltage standards, ensuring compatibility between devices.

Alternative Models

1. SN74LVC125A: Similar functionality with a different package (SOIC-14)
2. SN74LVC126A: Quad bus buffer with 3-state outputs and active-high enable
3. SN74LVC2244A: Octal buffer/line driver with 3-state outputs

These alternative models offer similar features and can be considered based on specific application requirements.

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