SN74AHCT125QPWRQ1

Product Overview

• Category: Integrated Circuit (IC)
• Use: Buffer/Line Driver
• Characteristics: High-Speed, Low-Power, Quad Bus Buffer Gate
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: Logic Level Translation
• Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +125°C
• Output Drive Capability: ±24mA at 3.3V
• Propagation Delay: 6ns (typical)
• Quiescent Current: 2µA (maximum)

Detailed Pin Configuration

The SN74AHCT125QPWRQ1 has a total of 14 pins, which are assigned specific functions as follows:

1. Pin 1: Input/Output (IO) for Channel A
2. Pin 2: Ground (GND)
3. Pin 3: IO for Channel B
4. Pin 4: IO for Channel C
5. Pin 5: IO for Channel D
6. Pin 6: Enable Input (EN)
7. Pin 7: Ground (GND)
8. Pin 8: IO for Channel D
9. Pin 9: IO for Channel C
10. Pin 10: IO for Channel B
11. Pin 11: IO for Channel A
12. Pin 12: Output Enable (OE)
13. Pin 13: Supply Voltage (VCC)
14. Pin 14: Ground (GND)

Functional Features

• Quad bus buffer gate with 3-state outputs
• Provides logic level translation between different voltage domains
• High-speed operation with low power consumption
• Supports bidirectional data flow
• 3-state outputs allow multiple devices to share a common bus

Advantages and Disadvantages

Advantages: - Enables interfacing between systems operating at different voltage levels - Low power consumption makes it suitable for battery-powered applications - High-speed operation ensures efficient data transfer - 3-state outputs provide flexibility in bus sharing scenarios

Disadvantages: - Limited output drive capability may restrict its use in certain high-current applications - Requires careful consideration of input and output voltage levels to prevent signal distortion

Working Principles

The SN74AHCT125QPWRQ1 is designed to perform logic level translation, allowing communication between integrated circuits operating at different voltage levels. It consists of four independent buffer gates, each capable of driving signals bidirectionally. The enable input (EN) and output enable (OE) pins control the direction and state of the outputs.

When the EN pin is high, the buffer gates are enabled, and the inputs are transferred to the outputs. Conversely, when the EN pin is low, the outputs are in a high-impedance state, isolating them from the inputs. The OE pin further controls the output state, allowing the user to disable all outputs simultaneously.

Detailed Application Field Plans

The SN74AHCT125QPWRQ1 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 requirements, such as sensors and microprocessors.
3. Bus Sharing: Multiple devices can share a common bus using the 3-state outputs, simplifying system design and reducing component count.
4. Battery-Powered Systems: Its low power consumption makes it suitable for portable devices, extending battery life.

Detailed and Complete Alternative Models

1. SN74AHCT125QDRQ1: SOIC (Small Outline Integrated Circuit) package variant
2. SN74AHCT125NSR: SOP (Small Outline Package) variant
3. SN74AHCT125PWR: TSSOP package variant without automotive qualification
4. SN74AHCT125DGVR: TVSOP (Thin Very Small Outline Package) variant

These alternative models offer similar functionality and performance but may differ in package type and pin configuration.

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