SN74HCT245PWG4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Level shifting and voltage translation
• Characteristics: High-speed, low-power, bidirectional voltage-level translator
• Package: TSSOP-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

Detailed Pin Configuration

The SN74HCT245PWG4 has a total of 20 pins. The pin configuration is as follows:

1. DIR: Direction control input
2. OE: Output enable input
3. A1: Data input/output port A1
4. A2: Data input/output port A2
5. A3: Data input/output port A3
6. A4: Data input/output port A4
7. A5: Data input/output port A5
8. GND: Ground
9. B5: Data input/output port B5
10. B4: Data input/output port B4
11. B3: Data input/output port B3
12. B2: Data input/output port B2
13. B1: Data input/output port B1
14. VCC: Positive supply voltage
15. B0: Data input/output port B0
16. A0: Data input/output port A0
17. VREFB: Reference voltage for port B
18. VREFA: Reference voltage for port A
19. NC: No connection
20. GND: Ground

Functional Features

• Bidirectional voltage-level translation between two independent voltage domains
• Automatic direction control based on the DIR input
• Output enable control through the OE input
• High-speed operation with low power consumption
• Compatible with TTL, CMOS, and HCT logic families

Advantages and Disadvantages

Advantages: - Allows interfacing between devices operating at different voltage levels - Supports bidirectional data transfer - Low power consumption - Wide supply voltage range

Disadvantages: - Limited number of data input/output ports (5 per side) - Propagation delay may affect timing in certain applications

Working Principles

The SN74HCT245PWG4 is a bidirectional voltage-level translator that allows seamless communication between devices operating at different voltage levels. It uses automatic direction control based on the DIR input to determine the direction of data flow. The OE input enables or disables the outputs.

When the DIR input is high, data flows from port A to port B. Conversely, when the DIR input is low, data flows from port B to port A. The voltage translation occurs without the need for external level-shifting components.

Detailed Application Field Plans

The SN74HCT245PWG4 is commonly used in various applications, including:

1. Microcontroller interfacing with peripherals operating at different voltage levels
2. Communication systems involving multiple voltage domains
3. Level shifting in mixed-signal circuits
4. Data transmission between different logic families

Detailed and Complete Alternative Models

Some alternative models that provide similar functionality to the SN74HCT245PWG4 include:

1. TXB0108PWR: 8-bit bidirectional voltage-level translator
2. PCA9306DCUR: Dual bidirectional I2C-bus and SMBus voltage-level translator
3. SN74LVC4245APWR: Octal bus transceiver with voltage-level shifting

These alternative models offer different package options, pin configurations, and additional features to suit specific application requirements.

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