Overview
The MAX3222IDBR is a 3-V to 5.5-V multichannel RS-232 line driver and receiver produced by Texas Instruments. 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 two line drivers, two line receivers, and a dual charge-pump circuit, enabling operation from a single 3-V to 5.5-V supply. The MAX3222IDBR also includes ±15-kV ESD protection on all serial-port connection pins, including GND, ensuring robustness against electrostatic discharge.
Key Specifications
| Parameter | Value |
|---|---|
| Supply Voltage (VCC) | 3-V to 5.5-V |
| Data Signaling Rate | Up to 250 kbps |
| Driver Output Slew Rate | 30-V/μs (maximum) |
| ESD Protection | ±15 kV (Human-Body Model) |
| Standby Current | 1 μA (typical) |
| Package Type | 20-SSOP (0.209", 5.30mm Width) |
| Number of Drivers | 2 |
| Number of Receivers | 2 |
| Operating Temperature | -40°C to 85°C |
| RoHS Compliance | Yes |
Key Features
- 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 supply.
- ±15-kV ESD protection on all serial-port connection pins, including GND.
- Low standby current: 1 μA typical.
- Accepts 5-V logic input with 3.3-V supply.
- External capacitors: 4 × 0.1 μF required.
- Power-down mode with PWRDOWN low, drawing only 1 μA from the power supply.
- Receiver outputs can be placed in the high-impedance state by setting EN high.
Applications
- Battery-powered systems.
- PDAs (Personal Digital Assistants).
- Notebooks and laptops.
- Palmtop PCs.
- Hand-held equipment.
Q & A
- What is the supply voltage range for the MAX3222IDBR?
The MAX3222IDBR operates with a supply voltage range of 3-V to 5.5-V.
- What is the maximum data signaling rate of the MAX3222IDBR?
The MAX3222IDBR supports data signaling rates up to 250 kbps.
- What level of ESD protection does the MAX3222IDBR offer?
The MAX3222IDBR provides ±15-kV ESD protection using the Human-Body Model (HBM).
- How many drivers and receivers does the MAX3222IDBR have?
The MAX3222IDBR features two line drivers and two line receivers.
- What is the standby current of the MAX3222IDBR?
The standby current of the MAX3222IDBR is 1 μA typical.
- Can the MAX3222IDBR be used in power-down mode?
Yes, the MAX3222IDBR can be placed in power-down mode by setting PWRDOWN low, which draws only 1 μA from the power supply.
- What type of package is the MAX3222IDBR available in?
The MAX3222IDBR is available in a 20-SSOP package.
- Is the MAX3222IDBR RoHS compliant?
Yes, the MAX3222IDBR is RoHS compliant.
- What are some common applications for the MAX3222IDBR?
Common applications include battery-powered systems, PDAs, notebooks, laptops, palmtop PCs, and hand-held equipment.
- Can the receiver outputs be placed in a high-impedance state?
Yes, the receiver outputs can be placed in the high-impedance state by setting EN high.
