Overview
The MAX3243ECPWE4, produced by Texas Instruments, is a 3V to 5.5V multichannel RS-232 line driver and receiver. This single-chip, single-supply device is designed to provide a comprehensive interface for IBM PC/AT serial ports and other compatible systems. It integrates three line drivers and five line receivers, along with a dual charge-pump circuit, making it ideal for applications requiring robust serial communication.
The device is characterized by its high ESD protection, meeting or exceeding the requirements of TIA/EIA-232-F and ITU V.28 standards. It operates at data signaling rates up to 250 kbit/s and features an auto-powerdown function to conserve power when no valid RS-232 signal is detected.
Key Specifications
| Parameter | Min | Typical | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage | 3 | - | 5.5 | V |
| Operating Temperature (MAX3243C) | 0 | - | 70 | °C |
| Operating Temperature (MAX3243I) | -40 | - | 85 | °C |
| High-Level Output Voltage (VOH) | 5 | 5.4 | - | V |
| Low-Level Output Voltage (VOL) | -5 | -5.4 | - | V |
| Data Signaling Rate | - | - | 250 | kbit/s |
| Active Current | - | 300 | - | μA |
| Standby Current | - | 1 | - | μA |
| ESD Protection (HBM) | - | - | ±15kV | - |
Key Features
- Operates with a 3V to 5.5V VCC supply, making it versatile for various applications.
- Single-chip and single-supply interface for IBM PC/AT serial ports.
- Three line drivers and five line receivers, suitable for DE-9 DTE interfaces.
- ±15kV ESD protection using the Human-Body Model (HBM) and IEC61000-4-2 standards.
- Auto-powerdown feature to disable driver outputs when no valid RS-232 signal is sensed, reducing power consumption.
- Always-active noninverting receiver output (ROUT2B) for ring indicator and valid RS-232 input checking.
- Accepts 5V logic input with a 3.3V supply.
- Serial-mouse driveability.
- Low active current (300μA typical) and low standby current (1μA typical).
Applications
- Battery-powered systems.
- Notebooks and laptops.
- Hand-held equipment.
- Tablets and palmtop PCs.
- Wired networking and data center and enterprise computing.
Q & A
- What is the operating voltage range of the MAX3243ECPWE4?
The MAX3243ECPWE4 operates with a VCC supply voltage ranging from 3V to 5.5V.
- How many line drivers and receivers does the MAX3243ECPWE4 have?
The device includes three line drivers and five line receivers.
- What is the maximum data signaling rate of the MAX3243ECPWE4?
The device can operate at data signaling rates up to 250 kbit/s.
- What kind of ESD protection does the MAX3243ECPWE4 offer?
The device provides ±15kV ESD protection using the Human-Body Model (HBM) and IEC61000-4-2 standards.
- Does the MAX3243ECPWE4 have an auto-powerdown feature?
- What is the typical active current consumption of the MAX3243ECPWE4?
The typical active current is 300μA.
- What is the typical standby current consumption of the MAX3243ECPWE4?
The typical standby current is 1μA.
- Can the MAX3243ECPWE4 accept 5V logic input with a 3.3V supply?
- What are some common applications of the MAX3243ECPWE4?
- What are the operating temperature ranges for the MAX3243C and MAX3243I versions?
The MAX3243C operates from 0°C to 70°C, while the MAX3243I operates from –40°C to 85°C.
