Overview
The SN65C3243PWR, produced by Texas Instruments, is a 3- to 5.5-V multichannel RS-232 line driver/receiver. This device is designed to provide the electrical interface between an asynchronous communication controller and the serial-port connector. It features three line drivers, five line receivers, and a dual charge-pump circuit, enabling operation from a single 3-V to 5.5-V supply. The SN65C3243PWR also includes robust ESD protection, exceeding ±15-kV using the Human-Body Model (HBM), and supports data signaling rates up to 1 Mbit/s.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Supply Voltage (VCC) | 3.0 | 3.3 / 5.0 | 5.5 | V |
| Operating Temperature (TA) | -40 | - | 85 | °C |
| Input Voltage Range (VI) | 0 | - | 5.5 | V |
| High-Level Output Voltage (VOH) | 5 | 5.4 | - | V |
| Low-Level Output Voltage (VOL) | -5.4 | -5 | - | V |
| Maximum Data Rate | - | - | 1 Mbit/s | - |
| ESD Protection | - | - | ±15 kV | - |
| Supply Current (ICC) | - | 1 | 10 | µA |
Key Features
- Operates with 3-V to 5.5-V VCC supply.
- Always-active noninverting receiver output (ROUT2B).
- Low standby current of 1 µA typical.
- External capacitors required (4 × 0.1 µF).
- Accepts 5-V logic input with 3.3-V supply.
- Inter-operable with SN65C3238 and SN75C3238.
- Supports operation from 250 kbit/s to 1 Mbit/s.
- RS-232 bus-pin ESD protection exceeds ±15-kV using Human-Body Model (HBM).
- Latch-up performance exceeds 100 mA per JESD 78, Class II.
- Flexible control options for power management, including auto-powerdown feature.
Applications
The SN65C3243PWR is suitable for various applications, including:
- Battery-powered systems.
- PDAs (Personal Digital Assistants).
- Notebooks and laptops.
- Palmtop PCs and hand-held equipment.
Q & A
- What is the operating voltage range of the SN65C3243PWR?
The SN65C3243PWR operates with a supply voltage (VCC) range of 3-V to 5.5-V. - What is the maximum data rate supported by the SN65C3243PWR?
The device supports data signaling rates up to 1 Mbit/s. - What kind of ESD protection does the SN65C3243PWR offer?
The SN65C3243PWR offers RS-232 bus-pin ESD protection exceeding ±15-kV using the Human-Body Model (HBM). - What are the key features of the auto-powerdown mode in the SN65C3243PWR?
The auto-powerdown feature disables the driver outputs when no valid RS-232 signal is detected, reducing the supply current to 1 µA when FORCEOFF is low and FORCEON is high. - What types of capacitors are required for the SN65C3243PWR?
The device requires four external capacitors (4 × 0.1 µF) for operation. - Is the SN65C3243PWR compatible with other Texas Instruments devices?
Yes, it is inter-operable with SN65C3238 and SN75C3238. - What is the typical standby current of the SN65C3243PWR?
The typical standby current is 1 µA. - What are some common applications for the SN65C3243PWR?
Common applications include battery-powered systems, PDAs, notebooks, laptops, palmtop PCs, and hand-held equipment. - What is the operating temperature range for the SN65C3243PWR?
The operating temperature range is -40°C to 85°C. - Does the SN65C3243PWR have any special power management features?
Yes, it includes flexible control options for power management, such as the auto-powerdown feature.
