SN74HCT646NTG4

Product Overview

• Category: Integrated Circuit
• Use: Bus Transceiver and Register
• Characteristics: High-speed, CMOS technology
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: Transfers data between two bidirectional buses with different voltage levels
• Packaging/Quantity: Tape and Reel, 2500 units 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 85°C
• Number of Pins: 24
• Logic Family: HCT (High-Speed CMOS)

Detailed Pin Configuration

1. OE (Output Enable) 1
2. A1 (Address Input) 1
3. A2 (Address Input) 2
4. A3 (Address Input) 3
5. A4 (Address Input) 4
6. A5 (Address Input) 5
7. A6 (Address Input) 6
8. GND (Ground)
9. B1 (Data Bus) 1
10. B2 (Data Bus) 2
11. B3 (Data Bus) 3
12. B4 (Data Bus) 4
13. B5 (Data Bus) 5
14. B6 (Data Bus) 6
15. DIR (Direction Control)
16. VCC (Supply Voltage)
17. OE (Output Enable) 2
18. A7 (Address Input) 7
19. A8 (Address Input) 8
20. A9 (Address Input) 9
21. A10 (Address Input) 10
22. A11 (Address Input) 11
23. A12 (Address Input) 12
24. B7 (Data Bus) 7

Functional Features

• Bidirectional data transfer between two buses with different voltage levels
• Output enable control for tristate operation
• Direction control for selecting the direction of data transfer
• High-speed operation suitable for various applications
• CMOS technology ensures low power consumption and high noise immunity

Advantages and Disadvantages

Advantages: - Allows interfacing between buses with different voltage levels - Supports bidirectional data transfer - Offers tristate operation for bus sharing - High-speed operation enhances system performance - Low power consumption due to CMOS technology

Disadvantages: - Limited number of address and data lines - Requires careful consideration of voltage compatibility between buses

Working Principles

The SN74HCT646NTG4 is a bus transceiver and register integrated circuit that facilitates bidirectional data transfer between two buses operating at different voltage levels. It features an output enable control pin (OE) for tristate operation, allowing multiple devices to share the same bus. The direction control pin (DIR) determines the direction of data flow.

When the DIR pin is set to logic low, data is transferred from Bus A to Bus B. Conversely, when the DIR pin is set to logic high, data is transferred from Bus B to Bus A. The OE pin enables or disables the outputs, allowing the device to be effectively disconnected from the bus when not in use.

The SN74HCT646NTG4 utilizes CMOS technology, which provides high-speed operation, low power consumption, and excellent noise immunity.

Detailed Application Field Plans

1. Interfacing between microcontrollers and peripheral devices with different voltage levels
2. Communication between systems using different communication protocols
3. Data transfer between memory modules and processors with varying voltage requirements
4. Bus sharing in multi-master systems

Detailed and Complete Alternative Models

1. SN74HCT245N: Octal Bus Transceiver with 3-State Outputs
2. SN74HCT541N: Octal Buffer/Line Driver with 3-State Outputs
3. SN74HCT573N: Octal D-Type Transparent Latch with 3-State Outputs
4. SN74HCT138N: 3-to-8 Line Decoder/Demultiplexer with 3-State Outputs
5. SN74HCT74N: Dual Positive-Edge-Triggered D-Type Flip-Flops with Clear

(Note: This is not an exhaustive list of alternative models, but it provides a range of options for similar functionality.)

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