Overview
The MAX3318EIDBR, produced by Texas Instruments, is a dual-driver, dual-receiver RS-232-compatible transceiver. This device is designed to operate at a data rate of 460 kbps and features integrated ±15 kV electrostatic discharge (ESD) protection for RS-232 I/O pins. It operates from a single 2.25-V to 3-V supply and includes a proprietary low-dropout driver output stage, enabling RS-232-compatible operation with minimal external components. The MAX3318EIDBR also includes an auto-power-down plus feature, which significantly reduces power consumption when the device is inactive.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage | 2.25 | 2.5 | 3 | V |
| Operating Temperature | -40 | 85 | °C | |
| Data Rate | 460 | kbps | ||
| ESD Protection (HBM) | ±15 | kV | ||
| ESD Protection (IEC 61000-4-2 Air-Gap Discharge) | ±15 | kV | ||
| ESD Protection (IEC 61000-4-2 Contact Discharge) | ±8 | kV | ||
| Supply Current (Active) | 0.3 | 2 | mA | |
| Supply Current (Auto-Power-Down) | 1 | 10 | μA | |
| Driver Output Voltage Swing | ±3.7 | ±4 | V | |
| Receiver Input Voltage Range | -25 | 25 | V |
Key Features
- ±15 kV ESD protection for RS-232 I/O pins using Human-Body Model (HBM), IEC 61000-4-2 Air-Gap Discharge, and IEC 61000-4-2 Contact Discharge methods.
- Operates from a single 2.25-V to 3-V supply with a dual charge pump requiring only four 0.1-μF capacitors.
- Auto-power-down plus feature reduces supply current to 1 μA when the device is inactive.
- Logic-level output (READY) indicates when the charge pump is regulating and the device is ready to transmit.
- Available in 20-pin SSOP and 20-pin TSSOP packages.
Applications
- Battery-Powered Systems
- PDAs
- Cellular Phones
- Notebooks
- Hand-Held Equipment
- Pagers
Q & A
- What is the MAX3318EIDBR? The MAX3318EIDBR is a dual-driver, dual-receiver RS-232-compatible transceiver produced by Texas Instruments.
- What is the operating voltage range of the MAX3318EIDBR? The device operates from a single 2.25-V to 3-V supply.
- What is the data rate of the MAX3318EIDBR? The MAX3318EIDBR operates at a data rate of 460 kbps.
- What level of ESD protection does the MAX3318EIDBR offer? The device features ±15 kV ESD protection using the Human-Body Model (HBM), ±15 kV using the IEC 61000-4-2 Air-Gap Discharge method, and ±8 kV using the IEC 61000-4-2 Contact Discharge method.
- How does the auto-power-down feature work? The auto-power-down plus feature reduces the supply current to 1 μA when the device is inactive, such as when the RS-232 cable is disconnected or the drivers of the connected peripherals are inactive for more than 30 seconds.
- What are the package options for the MAX3318EIDBR? The device is available in 20-pin SSOP and 20-pin TSSOP packages.
- What is the purpose of the READY output? The READY output is a logic-level signal that indicates when the charge pump is regulating and the device is ready to begin transmitting.
- What are some typical applications of the MAX3318EIDBR? Typical applications include battery-powered systems, PDAs, cellular phones, notebooks, hand-held equipment, and pagers.
- How does the device handle invalid data? The INVALID output indicates whether the receiver input voltage is within valid RS-232 levels; it goes low if all receiver input voltages are between –0.3 V and 0.3 V for more than 30 μs.
- What is the significance of the FORCEON and FORCEOFF inputs? These inputs allow manual control over the power state of the device, enabling or disabling the auto-power-down feature.
