Overview
The MAX3221EIPWR, produced by Texas Instruments, is a single-channel RS-232 line driver and receiver designed to operate from a single 3V to 5.5V supply. This device is part of the MAX3221E series and is known for its robust ESD protection and efficient power management features. It meets the requirements of TIA/EIA-232-F and provides the electrical interface between an asynchronous communication controller and the serial-port connector. The device includes a charge pump and requires four small external capacitors for operation, enabling data signaling rates up to 250 kbps and a maximum driver output slew rate of 30 V/μs.
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 (HBM) | ±15 kV | |
| Junction Temperature | -40 to 85 | °C |
| Storage Temperature Range | -65 to 150 | °C |
| Package Types | SSOP (DB, 16), TSSOP (PW, 16) |
Key Features
- Single-channel RS-232 line driver and receiver with ±15 kV ESD protection using the Human Body Model (HBM).
- Operates from a single 3V to 5.5V supply with a charge pump requiring four small external capacitors.
- Supports data signaling rates up to 250 kbps and a maximum driver output slew rate of 30 V/μs.
- Automatic power-down feature controlled by FORCEON and FORCEOFF inputs, and receiver controlled by EN input.
- INVALID output indicates the status of the receiver input, going low when the input is unpowered or disconnected.
- Meets the requirements of TIA/EIA-232-F and provides the electrical interface between an asynchronous communication controller and the serial-port connector.
Applications
- Palmtop PCs and hand-held equipment.
- Industrial automation and control systems.
- Point-of-sale terminals and other serial communication devices.
- Embedded systems requiring RS-232 communication.
Q & A
- What is the operating voltage range of the MAX3221EIPWR?
The MAX3221EIPWR operates from a single 3V to 5.5V supply.
- What is the maximum data signaling rate supported by the MAX3221EIPWR?
The device supports data signaling rates up to 250 kbps.
- What kind of ESD protection does the MAX3221EIPWR offer?
The device offers ±15 kV ESD protection using the Human Body Model (HBM).
- How is the power management controlled in the MAX3221EIPWR?
The power management is controlled by the FORCEON and FORCEOFF inputs for the driver, and the EN input for the receiver.
- What is the purpose of the INVALID output in the MAX3221EIPWR?
The INVALID output indicates the status of the receiver input, going low when the input is unpowered or disconnected.
- Can the MAX3221EIPWR be safely connected to an active remote RS-232 device when unpowered?
- What are the package types available for the MAX3221EIPWR?
The device is available in SSOP (DB, 16) and TSSOP (PW, 16) packages.
- What is the recommended capacitor configuration for the MAX3221EIPWR?
Texas Instruments recommends using four small external capacitors (typically 0.1 μF) for the charge pump, with optional additional capacitors for noise filtering.
- What is the junction temperature range for the MAX3221EIPWR?
The junction temperature range is -40°C to 85°C.
- What is the storage temperature range for the MAX3221EIPWR?
The storage temperature range is -65°C to 150°C.
