Overview
The MAX3237EIDWR is a multichannel RS-232 line driver/receiver produced by Texas Instruments. This device is designed to provide a reliable and efficient interface between an asynchronous communication controller and the serial-port connector. It operates within a voltage range of 3-V to 5.5-V and supports data signaling rates up to 1 Mbit/s. The MAX3237EIDWR features a dual charge-pump circuit, which generates the necessary voltage levels for RS-232 communication without the need for external voltage regulators. It also includes robust ESD protection, making it suitable for a variety of applications, including battery-powered, hand-held, and portable equipment.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 3 | - | 5.5 | V |
| Data Signaling Rate | 250 kbit/s | - | 1 Mbit/s | - |
| ESD Protection | - | - | ±15 kV | - |
| Standby Current | - | 1 mA | - | - |
| Shutdown Supply Current | - | - | 300 nA | - |
| High-Level Output Voltage (DOUT) | 5 | 5.4 | - | V |
| Low-Level Output Voltage (DOUT) | -5 | -5.4 | - | V |
| Transition-Region Slew Rate | 4 | - | 30 V/ms | - |
| Operating Temperature (MAX3237EC) | 0°C | - | 70°C | - |
| Operating Temperature (MAX3237EI) | -40°C | - | 85°C | - |
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 using a dual charge-pump circuit
- Five line drivers and three line receivers
- ±15 kV ESD protection for RS-232 I/O pins
- Low standby current of 1 mA typical
- Accepts 5-V logic input with a 3.3-V supply
- Designed to be interchangeable with Maxim devices
- Latch-up performance exceeds 100 mA per JESD 78, Class II
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 MAX3237EIDWR?
The MAX3237EIDWR operates within a voltage range of 3-V to 5.5-V. - What are the data signaling rates supported by the MAX3237EIDWR?
The device supports data signaling rates from 250 kbit/s to 1 Mbit/s. - What kind of ESD protection does the MAX3237EIDWR offer?
The MAX3237EIDWR offers ±15 kV ESD protection for RS-232 I/O pins. - How many line drivers and receivers does the MAX3237EIDWR have?
The device has five line drivers and three line receivers. - What is the typical standby current of the MAX3237EIDWR?
The typical standby current is 1 mA. - Can the MAX3237EIDWR 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 are some common applications of the MAX3237EIDWR?
Common applications include battery-powered, hand-held, and portable equipment, PDAs, notebooks, digital cameras, and mobile phones. - How does the MAX3237EIDWR handle shutdown mode?
In shutdown mode, the transmitters are disabled, and the outputs are forced into a high-impedance state, reducing the supply current to less than 1 mA. - What is the operating temperature range for the MAX3237EC and MAX3237EI?
The MAX3237EC operates from 0°C to 70°C, and the MAX3237EI operates from -40°C to 85°C. - What kind of charge-pump circuit does the MAX3237EIDWR use?
The device uses a dual charge-pump circuit that generates the necessary voltage levels for RS-232 communication.
