Overview
The MAX3243ECPWR, produced by Texas Instruments, is a 3-V to 5.5-V multichannel RS-232 line driver/receiver designed for single-chip and single-supply operation. It is compatible with the IBM PC/AT serial port interface and meets or exceeds the requirements of TIA/EIA-232-F and ITU V.28 standards. This device features three line drivers and five line receivers, making it ideal for applications requiring multiple serial port connections.
The MAX3243ECPWR includes robust ESD protection with ±15-kV Human-Body Model (HBM) and ±8-kV IEC61000-4-2 contact discharge protection, ensuring reliability in harsh environments. It operates at data rates up to 250 kbit/s and features low active and standby currents, making it suitable for battery-powered systems.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage Range | -0.3 | - | 6 | V |
| V+ Positive Output Supply Voltage Range | -0.3 | - | 7 | V |
| V- Negative Output Supply Voltage Range | -7 | - | 0.3 | V |
| Operating Free-Air Temperature (MAX3243EC) | 0 | - | 70 | °C |
| Operating Free-Air Temperature (MAX3243EI) | -40 | - | 85 | °C |
| Driver Output Voltage (VOH/VOL) | -5/-5.4 | - | 5/5.4 | V |
| Standby Current | - | 1 | - | μA |
| Data Signaling Rate | - | - | 250 | kbit/s |
Key Features
- Operates with a single 3-V to 5.5-V supply voltage.
- Single-chip and single-supply interface for IBM PC/AT serial port.
- Robust ESD protection: ±15-kV HBM, ±8-kV IEC61000-4-2 contact discharge, and ±15-kV IEC61000-4-2 air-gap discharge.
- Three line drivers and five line receivers.
- Always-active noninverting receiver output (ROUT2B).
- Low active current: 300 μA typical, and low standby current: 1 μA typical.
- External capacitors: 4 × 0.1 μF.
- Accepts 5-V logic input with 3.3-V supply.
- Serial-mouse driveability.
- Auto-powerdown feature to disable driver outputs when no valid RS-232 signal is sensed.
Applications
- Battery-powered systems.
- Wired networking.
- Data center and enterprise computing.
- Notebooks and laptops.
- Palmtop PCs and hand-held equipment.
Q & A
- What is the operating voltage range of the MAX3243ECPWR?
The MAX3243ECPWR operates with a single 3-V to 5.5-V supply voltage.
- What kind of ESD protection does the MAX3243ECPWR offer?
The device features ±15-kV HBM, ±8-kV IEC61000-4-2 contact discharge, and ±15-kV IEC61000-4-2 air-gap discharge ESD protection.
- How many line drivers and receivers does the MAX3243ECPWR have?
The device includes three line drivers and five line receivers.
- What is the maximum data signaling rate of the MAX3243ECPWR?
The device can operate at data signaling rates up to 250 kbit/s.
- Does the MAX3243ECPWR support auto-powerdown?
Yes, it features an auto-powerdown function to disable driver outputs when no valid RS-232 signal is sensed.
- What are the typical standby and active currents of the MAX3243ECPWR?
The typical standby current is 1 μA, and the typical active current is 300 μA.
- What types of packages are available for the MAX3243ECPWR?
The device is available in SSOP (DB), SOIC (DW), and TSSOP (PW) packages.
- Does the MAX3243ECPWR support 5-V logic input with a 3.3-V supply?
Yes, it accepts 5-V logic input with a 3.3-V supply.
- What is the purpose of the ROUT2B output in the MAX3243ECPWR?
The ROUT2B output is an always-active noninverting receiver output, which allows applications using the ring indicator to transmit data while the device is powered down.
- What are some common applications for the MAX3243ECPWR?
Common applications include battery-powered systems, wired networking, data center and enterprise computing, notebooks, laptops, and hand-held equipment.
