Overview
The MAX3227IDBR from Texas Instruments is a 3-V to 5.5-V single-channel RS-232 line driver/receiver with ±15-kV ESD protection. This device is designed to provide a reliable and efficient electrical interface between an asynchronous communication controller and a serial-port connector. It operates within a wide supply voltage range and is suitable for various applications requiring serial communication.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Supply Voltage Range (VCC) | -0.3 | - | 6 | V |
| Positive Output Supply Voltage Range (V+) | -0.3 | - | 7 | V |
| Negative Output Supply Voltage Range (V-) | 0.3 | - | -7 | V |
| Supply Voltage Difference (V+ - V-) | - | - | 13 | V |
| Operating Free-Air Temperature (MAX3227I) | -40 | - | 85 | °C |
| Driver Output Slew Rate | - | - | 30 V/µs | - |
| Data Signaling Rate | - | - | 1 Mbit/s | - |
| Standby Current (Auto-Powerdown Plus Enabled) | - | 1 | 10 | µA |
| ESD Protection (Human-Body Model) | - | - | ±15 kV | - |
Key Features
- Operates with 3-V to 5.5-V VCC supply.
- Meets or exceeds the requirements of TIA/EIA-232-F and ITU v.28 standards.
- Auto-Powerdown Plus feature automatically disables drivers for power savings.
- Low standby current of 1 µA (typical) when auto-powerdown plus is enabled.
- Accepts 5-V logic input with 3.3-V supply.
- Designed to be interchangeable with Maxim™ MAX3227.
- ESD protection for RS-232 I/O pins: ±15 kV (Human-Body Model), ±8 kV (IEC61000-4-2, Contact and Air-Gap Discharge).
- Logic-level output (READY) that asserts when the charge pump is regulating and the device is ready to begin transmitting.
- Packaged in plastic shrink small-outline package (DB package).
Applications
- Battery-powered, hand-held, and portable equipment.
- PDAs and palmtop PCs.
- Notebooks, sub-notebooks, and laptops.
- Digital cameras.
- Mobile phones and wireless devices.
Q & A
- What is the operating voltage range of the MAX3227IDBR?
The MAX3227IDBR operates with a supply voltage range of 3-V to 5.5-V.
- What are the key standards that the MAX3227IDBR complies with?
The device meets or exceeds the requirements of TIA/EIA-232-F and ITU v.28 standards.
- What is the auto-powerdown plus feature, and how does it work?
The auto-powerdown plus feature automatically disables the drivers when the RS-232 cable is disconnected or the drivers of the connected peripherals are inactive for more than 30 seconds, reducing the supply current to 1 µA.
- What is the ESD protection level of the MAX3227IDBR?
The device has ±15 kV ESD protection (Human-Body Model) and ±8 kV ESD protection (IEC61000-4-2, Contact and Air-Gap Discharge).
- What is the maximum data signaling rate of the MAX3227IDBR?
The device operates at data-signaling rates of up to 1 Mbit/s.
- Can the MAX3227IDBR accept 5-V logic input with a 3.3-V supply?
- What is the typical standby current when auto-powerdown plus is enabled?
The typical standby current is 1 µA when auto-powerdown plus is enabled.
- What package type is the MAX3227IDBR available in?
The device is packaged in a plastic shrink small-outline package (DB package).
- What are the operating temperature ranges for the MAX3227I?
The MAX3227I operates from –40°C to 85°C.
- Does the MAX3227IDBR have a READY output signal?
