Overview
The MAX3223MDBREP, produced by Texas Instruments, is a 3-V to 5.5-V multichannel RS-232 line driver/receiver with ±15-kV ESD protection. 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 supply voltage, making it suitable for various battery-powered and low-power applications.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Supply Voltage Range | –0.3 | 6 | V | |
| Operating Free-Air Temperature | –55 | 125 | °C | |
| Driver Output Voltage (High-Level) | 5 | 5.4 | V | |
| Driver Output Voltage (Low-Level) | –5 | –5.4 | V | |
| Driver Output Slew Rate | 30 | V/µs | ||
| Data Signaling Rate | 250 | kbit/s | ||
| Standby Current | 1 | µA | ||
| ESD Protection | ±15 | kV |
Key Features
- Operates with 3-V to 5.5-V VCC supply.
- Meets or exceeds TIA/EIA-232-F and ITU v.28 standards.
- Two line drivers and two line receivers.
- Dual charge-pump circuit for single-supply operation.
- ±15-kV ESD protection on serial-port connection pins, including GND.
- Low standby current of 1 µA typical.
- External capacitors: 4 × 0.1 µF.
- Accepts 5-V logic input with 3.3-V supply.
- Auto-powerdown feature with flexible control options.
- INVALID output to indicate valid RS-232 signal presence.
Applications
- Battery-powered systems.
- Notebooks and laptops.
- Palmtop PCs and hand-held equipment.
- Controlled baseline and extended temperature performance devices.
- PDA and other portable electronic devices.
Q & A
- What is the operating voltage range of the MAX3223MDBREP?
The MAX3223MDBREP operates with a supply voltage range of 3-V to 5.5-V. - What are the key standards that the MAX3223MDBREP complies with?
The device meets or exceeds the requirements of TIA/EIA-232-F and ITU v.28 standards. - How many line drivers and receivers does the MAX3223MDBREP have?
The device includes two line drivers and two line receivers. - What is the ESD protection level of the MAX3223MDBREP?
The device has ±15-kV ESD protection on serial-port connection pins, including GND. - What is the typical standby current of the MAX3223MDBREP?
The typical standby current is 1 µA. - What external capacitors are required for the MAX3223MDBREP?
The device requires four external 0.1 µF capacitors. - Can the MAX3223MDBREP accept 5-V logic input with a 3.3-V supply?
Yes, it can accept 5-V logic input with a 3.3-V supply. - What is the auto-powerdown feature of the MAX3223MDBREP?
The auto-powerdown feature disables the driver outputs when no valid RS-232 signal is sensed, reducing supply current to 1 µA. - What is the purpose of the INVALID output in the MAX3223MDBREP?
The INVALID output indicates whether a valid RS-232 signal is present at any receiver input. - What is the maximum data signaling rate of the MAX3223MDBREP?
The device operates at data signaling rates up to 250 kbit/s.
