Overview
The MAX3223EIPWR, produced by Texas Instruments, is a dual RS-232 transceiver designed for use in a variety of applications requiring serial communication. This device consists of two line drivers and two line receivers, along with a dual charge-pump circuit that enables operation from a single 3-V to 5.5-V supply. It meets or exceeds the requirements of TIA/EIA-232-F and ITU v.28 standards, ensuring compatibility with standard RS-232 interfaces.
The MAX3223EIPWR features advanced power management options, including an auto-powerdown feature that reduces supply current to 1 μA when the serial port is inactive. This makes it particularly suitable for battery-powered systems and other applications where power efficiency is crucial.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 3.0 (VCC = 3.3 V), 4.5 (VCC = 5 V) | 3.3, 5 | 3.6 (VCC = 3.3 V), 5.5 (VCC = 5 V) | V |
| Operating Free-Air Temperature | 0 (MAX3223EC), -40 (MAX3223EI) | - | 70 (MAX3223EC), 85 (MAX3223EI) | °C |
| Driver Output Slew Rate | - | 30 | - | V/μs |
| Propagation Delay Time (tPLH, tPHL) | - | 150 | - | ns |
| ESD Protection (HBM) | - | ±15 kV | - | - |
| ESD Protection (IEC61000-4-2, Contact Discharge) | - | ±8 kV | - | - |
| ESD Protection (IEC61000-4-2, Air-Gap Discharge) | - | ±15 kV | - | - |
| Standby Current | - | 1 μA | - | - |
| Data Signaling Rate | - | Up to 500 kbit/s | - | - |
Key Features
- ESD Protection: ±15-kV Human-body model (HBM), ±8-kV IEC61000-4-2 Contact discharge, and ±15-kV IEC61000-4-2 Air-gap discharge.
- Meets or exceeds TIA/EIA-232-F and ITU v.28 standards.
- Operates with 3-V to 5.5-V VCC supply.
- Supports data signaling rates up to 500 kbit/s.
- Includes two drivers and two receivers.
- Low standby current: 1 μA typical.
- External capacitors: 4 × 0.1 μF required.
- Accepts 5-V logic input with 3.3-V supply.
- Auto-powerdown feature to reduce power consumption when the serial port is inactive.
- INVALID output to indicate valid or invalid RS-232 signal levels.
Applications
- Battery-powered systems.
- PDAs (Personal Digital Assistants).
- Notebooks and laptops.
- Palmtop PCs.
- Hand-held equipment.
Q & A
- What is the operating voltage range of the MAX3223EIPWR?
The MAX3223EIPWR operates with a supply voltage (VCC) ranging from 3.0 V to 5.5 V.
- What are the ESD protection levels of the MAX3223EIPWR?
The device offers ±15-kV Human-body model (HBM), ±8-kV IEC61000-4-2 Contact discharge, and ±15-kV IEC61000-4-2 Air-gap discharge ESD protection.
- What is the maximum data signaling rate supported by the MAX3223EIPWR?
The MAX3223EIPWR supports data signaling rates up to 500 kbit/s.
- How many drivers and receivers does the MAX3223EIPWR have?
The device includes two line drivers and two line receivers.
- What is the typical standby current of the MAX3223EIPWR?
The typical standby current is 1 μA.
- What is the purpose of the INVALID output in the MAX3223EIPWR?
The INVALID output indicates whether the receiver input voltage is within valid RS-232 signal levels.
- Can the MAX3223EIPWR operate with 5-V logic input on a 3.3-V supply?
Yes, the device can accept 5-V logic input with a 3.3-V supply.
- What is the auto-powerdown feature in the MAX3223EIPWR?
The auto-powerdown feature disables the driver outputs and reduces supply current to 1 μA when the serial port is inactive.
- What types of packages are available for the MAX3223EIPWR?
The device is available in SOIC (DW), SSOP (DB), and TSSOP (PW) packages.
- What are the typical operating temperatures for the MAX3223EIPWR?
The operating free-air temperature ranges from 0°C to 70°C for the MAX3223EC and from -40°C to 85°C for the MAX3223EI.
