Overview
The MAX3221IPWR, produced by Texas Instruments, is a 3-V to 5.5-V single-channel RS-232 line driver and receiver. This device is designed to provide a reliable and efficient interface between an asynchronous communication controller and a serial-port connector. It meets or exceeds the requirements of TIA/EIA-232-F and ITU V.28 standards, ensuring compatibility with a wide range of serial communication applications.
The MAX3221IPWR features a dual charge-pump circuit that allows operation from a single 3-V to 5.5-V supply, using only four small external capacitors. It also includes automatic power-down and power management features to reduce power consumption when the serial port is inactive.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| VCC Supply Voltage | 3 to 5.5 | V |
| Data Signaling Rate | Up to 250 | kbps |
| Driver Output Slew Rate | Up to 30 | V/μs |
| ESD Protection | ±15 kV | HBM |
| Operating Temperature | -40 to 85 | °C |
| Standby Current | 1 μA (typical) | μA |
| Package Type | TSSOP-16 | |
| Body Size | 5.00 mm × 4.40 mm | mm |
Key Features
- RS-232 bus-pin ESD protection exceeds ±15 kV using the Human Body Model (HBM).
- Meets or exceeds the requirements of TIA/EIA-232-F and ITU V.28 standards.
- Operates with a single 3-V to 5.5-V VCC supply.
- Supports data signaling rates up to 250 kbps.
- Maximum driver output slew rate of 30 V/μs.
- Low standby current: 1 μA typical.
- Automatic power-down feature to reduce power consumption when the serial port is inactive.
- External capacitors: 4 × 0.1 μF required for operation.
- Accepts 5-V logic input with a 3.3-V supply.
Applications
- Palmtop PCs and other portable devices.
- Hand-held equipment and mobile devices.
- Industrial automation and control systems.
- Medical devices requiring serial communication interfaces.
- Any application requiring RS-232 serial communication with low power consumption and high ESD protection.
Q & A
- What is the operating voltage range of the MAX3221IPWR?
The MAX3221IPWR operates with a single 3-V to 5.5-V VCC supply.
- What is the maximum data signaling rate supported by the MAX3221IPWR?
The device supports data signaling rates up to 250 kbps.
- What level of ESD protection does the MAX3221IPWR offer?
The MAX3221IPWR offers RS-232 bus-pin ESD protection exceeding ±15 kV using the Human Body Model (HBM).
- How does the automatic power-down feature work in the MAX3221IPWR?
The automatic power-down feature disables the driver output and reduces the supply current to 1 μA when the serial port is inactive and no valid RS-232 signal is detected on the receiver input.
- What type of package is the MAX3221IPWR available in?
The MAX3221IPWR is available in a TSSOP-16 package.[
- What are the dimensions of the TSSOP-16 package for the MAX3221IPWR?
The TSSOP-16 package dimensions are 5.00 mm × 4.40 mm.[
- Can the MAX3221IPWR operate with 5-V logic input on a 3.3-V supply?
Yes, the MAX3221IPWR can accept 5-V logic input with a 3.3-V supply.[
- What is the typical standby current of the MAX3221IPWR?
The typical standby current is 1 μA.[
- How many external capacitors are required for the MAX3221IPWR to operate?
The device requires four external capacitors, each 0.1 μF.[
- Is the MAX3221IPWR suitable for use in industrial automation?
Yes, the MAX3221IPWR is suitable for use in industrial automation and control systems due to its robust ESD protection and reliable operation.[
