QS3244PAG

Product Overview

• Category: Integrated Circuit (IC)
• Use: Bus Switch
• Characteristics: High-speed, low-power, bidirectional bus switch
• Package: 20-pin TSSOP (Thin Shrink Small Outline Package)
• Essence: QS3244PAG is a versatile bus switch designed for high-speed digital applications. It provides bidirectional buffering and signal isolation between two buses.
• Packaging/Quantity: QS3244PAG is typically sold in reels of 2500 units.

Specifications

• Supply Voltage: 2.3V to 3.6V
• Operating Temperature Range: -40°C to +85°C
• Switching Speed: 5ns maximum propagation delay
• Input/Output Capacitance: 5pF typical
• On-Resistance: 5Ω maximum

Detailed Pin Configuration

The QS3244PAG has a total of 20 pins, which are assigned as follows:

1. OE (Output Enable) 1
2. A1 (Bus A Control Input) 1
3. B1 (Bus B Control Input) 1
4. GND (Ground)
5. B2 (Bus B Control Input) 2
6. A2 (Bus A Control Input) 2
7. OE (Output Enable) 2
8. VCC (Power Supply)
9. B3 (Bus B Control Input) 3
10. A3 (Bus A Control Input) 3
11. I/O1 (Bidirectional Data I/O) 1
12. I/O2 (Bidirectional Data I/O) 2
13. I/O3 (Bidirectional Data I/O) 3
14. GND (Ground)
15. I/O4 (Bidirectional Data I/O) 4
16. I/O5 (Bidirectional Data I/O) 5
17. I/O6 (Bidirectional Data I/O) 6
18. VCC (Power Supply)
19. I/O7 (Bidirectional Data I/O) 7
20. I/O8 (Bidirectional Data I/O) 8

Functional Features

• Bidirectional buffering: QS3244PAG allows bidirectional data transfer between two buses, providing signal isolation and preventing bus contention.
• High-speed operation: With a maximum propagation delay of 5ns, the QS3244PAG ensures fast data transmission.
• Low power consumption: The IC is designed to operate at low power levels, making it suitable for battery-powered devices.
• Output enable control: The OE pins allow the user to enable or disable the bus switch as needed.

Advantages and Disadvantages

Advantages: - Fast switching speed enables high-speed data transfer. - Bidirectional buffering prevents bus contention and signal distortion. - Low power consumption extends battery life in portable devices. - Compact TSSOP package saves board space.

Disadvantages: - Limited number of bidirectional data I/O pins (8 in total). - Requires external control signals for proper operation.

Working Principles

The QS3244PAG operates by using control signals (A1, B1, A2, B2, A3, B3, OE1, OE2) to selectively connect or disconnect the bidirectional data lines (I/O1-I/O8) between Bus A and Bus B. When the control inputs are set appropriately, the IC acts as a bridge, allowing data to flow bidirectionally between the two buses. The output enable pins (OE1, OE2) can be used to enable or disable the bus switch, controlling the flow of data.

Detailed Application Field Plans

The QS3244PAG is commonly used in various applications, including:

1. Data communication systems
2. Networking equipment
3. Computer peripherals
4. Industrial automation
5. Test and measurement instruments
6. Consumer electronics

Alternative Models

Here are some alternative models that can be considered as alternatives to the QS3244PAG:

1. SN74CBT3257: 32-bit FET bus switch with similar characteristics and pin configuration.
2. NC7SB3257: TinyLogic UHS 2-bit bus switch with low power consumption.
3. PI5C3257: 2-bit bidirectional bus switch with high-speed operation.

These alternative models offer similar functionality and can be used as replacements depending on specific requirements.

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