MAX3221ECDBR

Product Overview

• Category: Integrated Circuit (IC)
• Use: RS-232 Transceiver
• Characteristics: Low-power, 3.0V to 5.5V supply voltage, ESD protection, small package size
• Package: 20-pin SSOP (Shrink Small Outline Package)
• Essence: The MAX3221ECDBR is a high-speed RS-232 transceiver that provides communication between low-voltage microcontrollers and RS-232 devices.
• Packaging/Quantity: Available in tape and reel packaging with 2500 units per reel.

Specifications

• Supply Voltage: 3.0V to 5.5V
• Data Rate: Up to 1Mbps
• Number of Channels: 1
• Operating Temperature Range: -40°C to +85°C
• ESD Protection: ±15kV Human Body Model (HBM), ±8kV IEC61000-4-2 Air-Gap Discharge, ±6kV IEC61000-4-2 Contact Discharge

Pin Configuration

The MAX3221ECDBR has a 20-pin SSOP package with the following pin configuration:

1. VCC
2. C1IN
3. C1OUT
4. GND
5. T1IN
6. T1OUT
7. R1IN
8. R1OUT
9. SHDN
10. NC
11. NC
12. NC
13. NC
14. NC
15. NC
16. NC
17. NC
18. NC
19. NC
20. NC

Functional Features

• Supports 3.0V to 5.5V supply voltage range, making it compatible with various microcontrollers.
• Provides ESD protection to prevent damage from electrostatic discharge.
• Supports data rates up to 1Mbps, enabling high-speed communication.
• Low-power consumption for energy-efficient operation.
• Single-channel design simplifies integration into systems.

Advantages and Disadvantages

Advantages: - Wide supply voltage range allows compatibility with different microcontrollers. - High-speed data transmission capability. - Small package size saves board space. - ESD protection ensures device reliability.

Disadvantages: - Limited to a single channel, which may not be suitable for applications requiring multiple RS-232 connections. - May require additional components for complete RS-232 communication implementation.

Working Principles

The MAX3221ECDBR operates as an RS-232 transceiver by converting the logic-level signals from a microcontroller to RS-232 voltage levels. It uses internal charge pumps to generate the necessary voltage levels required by the RS-232 standard. The transceiver also incorporates ESD protection circuitry to safeguard against electrostatic discharge events.

Detailed Application Field Plans

The MAX3221ECDBR is commonly used in various applications that require communication between low-voltage microcontrollers and RS-232 devices. Some typical application fields include:

1. Industrial automation systems
2. Point-of-sale (POS) terminals
3. Medical equipment
4. Networking devices
5. Test and measurement instruments

Detailed and Complete Alternative Models

• MAX3232ECDR: Similar to MAX3221ECDBR but with two channels instead of one.
• MAX3243EIPWR: Four-channel RS-232 transceiver with enhanced ESD protection.
• MAX3237EIDBR: High-speed, three-driver/five-receiver RS-232 transceiver.

These alternative models offer different features and capabilities to suit specific application requirements.

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