SN74ALVCH245NSR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Level Shifter and Bus Transceiver
• Characteristics: High-speed, low-power, bidirectional voltage level translator
• Package: 20-pin small-outline integrated circuit (SOIC)
• Essence: Translates signals between different voltage levels in digital systems
• Packaging/Quantity: Tape and reel packaging, 2500 units per reel

Specifications

• Supply Voltage Range: 1.65V to 3.6V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Maximum Operating Frequency: 400 MHz
• Number of Channels: 8
• Input/Output Type: Tri-State
• Logic Family: ALVC/VHC
• Propagation Delay: 2.5 ns (Max)
• Low Power Consumption: ICC = 4 μA (Max)

Detailed Pin Configuration

The SN74ALVCH245NSR has a total of 20 pins. The pin configuration is as follows:

1. OE (Output Enable) - Active LOW output enable input
2. A1 - Data input/output for channel 1
3. B1 - Data input/output for channel 1
4. A2 - Data input/output for channel 2
5. B2 - Data input/output for channel 2
6. A3 - Data input/output for channel 3
7. B3 - Data input/output for channel 3
8. GND - Ground
9. B4 - Data input/output for channel 4
10. A4 - Data input/output for channel 4
11. B5 - Data input/output for channel 5
12. A5 - Data input/output for channel 5
13. B6 - Data input/output for channel 6
14. A6 - Data input/output for channel 6
15. B7 - Data input/output for channel 7
16. A7 - Data input/output for channel 7
17. B8 - Data input/output for channel 8
18. A8 - Data input/output for channel 8
19. VCC - Power supply voltage
20. DIR - Direction control input

Functional Features

• Bidirectional voltage level translation between two different voltage domains
• Allows interfacing between devices operating at different logic levels
• Supports both 3.3V and 2.5V systems
• Provides eight channels for data transmission
• Tri-state outputs allow multiple devices to share a common bus

Advantages and Disadvantages

Advantages: - High-speed operation - Low power consumption - Wide supply voltage range - Easy integration into digital systems - Bidirectional communication capability

Disadvantages: - Limited number of channels (8) - Requires careful consideration of voltage compatibility

Working Principles

The SN74ALVCH245NSR is designed to translate signals between two voltage domains in digital systems. It uses a combination of MOSFETs and CMOS technology to achieve bidirectional voltage level shifting. The direction of data flow is controlled by the DIR pin. When DIR is HIGH, data flows from A to B, and when DIR is LOW, data flows from B to A.

Detailed Application Field Plans

The SN74ALVCH245NSR is commonly used in various applications, including:

1. Microcontroller interfacing with different voltage peripherals
2. Level shifting in mixed-voltage systems
3. Bus transceiver in communication protocols such as I2C and SPI
4. Voltage level translation in battery-powered devices
5. Interface between different logic families

Detailed and Complete Alternative Models

1. SN74LVC245A: Similar functionality with lower power consumption
2. SN74LVCH16245A: 16-channel bidirectional voltage level translator
3. SN74AVC4T245: 4-channel voltage level translator with integrated level shifting capabilities
4. SN74HCT245: Octal bus transceiver with non-inverting outputs

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

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