Overview
The MAX3222CPWR, produced by Texas Instruments, is a 3-V to 5.5-V multichannel RS-232 line driver and receiver. This device is designed to provide the electrical interface between an asynchronous communication controller and the serial-port connector, adhering to the TIA/EIA-232-F and ITU v.28 standards. It features a dual charge-pump circuit that allows operation from a single 3-V to 5.5-V supply, utilizing four small external capacitors. The MAX3222CPWR includes two line drivers and two line receivers, offering ±15-kV ESD protection on serial-port connection pins, including GND.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 3.0 | 3.3 / 5.0 | 5.5 | V |
| Positive Output Supply Voltage (V+) | -0.3 | - | 7 | V |
| Negative Output Supply Voltage (V-) | 0.3 | - | -7 | V |
| Input Voltage (VI) for Drivers, EN, PWRDOWN | -0.3 | - | 6 | V |
| Operating Free-Air Temperature | 0 | - | 70 (MAX3222C), 85 (MAX3222I) | °C |
| Data Signaling Rate | - | - | 250 kbit/s | - |
| Driver Output Slew Rate | - | - | 30 V/μs | - |
| Standby Current | - | 1 | - | μA |
Key Features
- RS-232 bus-pin ESD protection exceeds ±15 kV using Human-Body Model (HBM)
- Meets or exceeds the requirements of TIA/EIA-232-F and ITU v.28 standards
- Operates with a 3-V to 5.5-V VCC supply
- Operates up to 250 kbps data signaling rate
- Includes two drivers and two receivers
- Low standby current: 1 µA typical
- Requires four small external capacitors (0.1 µF each)
- Accepts 5-V logic input with a 3.3-V supply
- Alternative high-speed pin-compatible device (1 Mbps) - SNx5C3222
Applications
- Battery-powered systems
- PDAs
- Notebooks
- Laptops
- Palmtop PCs
- Hand-held equipment
Q & A
- What is the operating voltage range of the MAX3222CPWR?
The MAX3222CPWR operates with a supply voltage (VCC) ranging from 3.0 V to 5.5 V.
- What is the maximum data signaling rate supported by the MAX3222CPWR?
The device supports data signaling rates up to 250 kbit/s.
- How many drivers and receivers does the MAX3222CPWR have?
The MAX3222CPWR includes two line drivers and two line receivers.
- What is the ESD protection level of the MAX3222CPWR?
The device offers ±15 kV ESD protection using the Human-Body Model (HBM).
- How does the power-down mode affect the device?
In power-down mode, the drivers are placed in a high-impedance state, and the onboard charge pump is disabled. The receivers remain active.
- What are the typical applications of the MAX3222CPWR?
Typical applications include battery-powered systems, PDAs, notebooks, laptops, palmtop PCs, and hand-held equipment.
- What kind of capacitors are required for the MAX3222CPWR?
The device requires four small external capacitors (0.1 µF each) for the charge pump.
- Can the MAX3222CPWR accept 5-V logic input with a 3.3-V supply?
- What is the standby current of the MAX3222CPWR?
The standby current is typically 1 µA.
- Is there an alternative high-speed version of the MAX3222CPWR?
