SN74HCT245DBR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Level shifting and signal buffering
• Characteristics: High-speed, low-power, bidirectional voltage-level translator
• Package: SSOP-20
• Essence: Translates signals between different voltage levels
• Packaging/Quantity: Tape and reel, 2500 units per reel

Specifications

• Supply Voltage Range: 2V to 6V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Maximum Input Current: ±20mA
• Maximum Output Current: ±35mA
• Propagation Delay Time: 10ns (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The SN74HCT245DBR has a total of 20 pins. The pin configuration is as follows:

1. OE (Output Enable) 1
2. A1 (Input/Output) 1
3. B1 (Input/Output) 1
4. GND (Ground)
5. B2 (Input/Output) 2
6. A2 (Input/Output) 2
7. VCC (Supply Voltage)
8. DIR (Direction Control)
9. OE (Output Enable) 2
10. B3 (Input/Output) 3
11. A3 (Input/Output) 3
12. B4 (Input/Output) 4
13. A4 (Input/Output) 4
14. VREF (Reference Voltage)
15. GND (Ground)
16. A5 (Input/Output) 5
17. B5 (Input/Output) 5
18. OE (Output Enable) 3
19. Y1 (Output) 1
20. Y2 (Output) 2

Functional Features

• Bidirectional voltage-level translation between two different voltage domains
• Non-inverting level shifting
• High-speed operation with low power consumption
• 3-state outputs for easy interfacing with other devices
• Output enable control for flexible signal routing

Advantages and Disadvantages

Advantages: - Wide supply voltage range allows compatibility with various systems - Fast propagation delay time enables high-speed data transfer - Low power consumption for energy-efficient applications - 3-state outputs provide flexibility in signal routing

Disadvantages: - Limited number of input/output channels (5 pairs) - May require additional components for voltage level translation beyond the specified range

Working Principles

The SN74HCT245DBR is a bidirectional voltage-level translator that operates by converting signals between two different voltage domains. It uses non-inverting buffers to shift the logic levels of input signals to match the desired output voltage levels. The direction of translation is controlled by the DIR pin, which determines whether the translation is from A-side to B-side or vice versa. The OE pins are used to enable or disable the outputs, allowing for 3-state operation.

Detailed Application Field Plans

The SN74HCT245DBR is commonly used in various applications where voltage level translation is required. Some of the typical application fields include:

1. Microcontroller interfacing: The IC can be used to interface microcontrollers operating at different voltage levels, enabling communication between them.
2. Communication systems: It can be employed in serial communication interfaces, such as UART, SPI, or I2C, to ensure proper signal translation between different devices.
3. Logic level conversion: The IC facilitates the translation of logic levels in mixed-voltage systems, allowing seamless integration of components with varying voltage requirements.
4. Sensor networks: It can be utilized in sensor networks to bridge the gap between sensors operating at different voltage levels and the main control unit.

Detailed and Complete Alternative Models

1. TXB0108PWR: 8-bit bidirectional voltage-level translator with automatic direction sensing.
2. PCA9306DCTR: Dual bidirectional I2C-bus and SMBus voltage-level translator with enable pins.
3. SN74LVC4245APW: Octal bus transceiver and voltage-level shifter with 3-state outputs.
4. CD4050BE: Hex non-inverting buffer/converter for translating logic levels between different voltage domains.
5. TXS0108EPWR: 8-bit bidirectional voltage-level translator with integrated ESD protection.

These alternative models offer similar functionality to the SN74HCT245DBR and can be considered as substitutes depending on specific requirements.

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