Overview
The SN65C3222EPW, produced by Texas Instruments, is a 3-V to 5.5-V dual-channel RS-232 line driver and receiver integrated circuit. This device is designed to provide a robust and reliable interface between an asynchronous communication controller and the serial-port connector. It meets or exceeds the requirements of the TIA/EIA-232-F and ITU v.28 standards, ensuring compatibility with a wide range of serial communication applications.
The SN65C3222EPW features a dual charge-pump circuit that allows operation from a single 3-V to 5.5-V supply, eliminating the need for external voltage regulators. The device includes two line drivers and two line receivers, making it a comprehensive solution for serial communication needs.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage Range (VCC) | -0.3 | - | 6 | V |
| Positive-Output Supply Voltage Range (V+) | -0.3 | - | 7 | V |
| Negative-Output Supply Voltage Range (V-) | 0.3 | - | -3.2 | V |
| Driver and Control High-Level Input Voltage (VIH) | 2 | - | VCC | V |
| Driver and Control Low-Level Input Voltage (VIL) | 0.8 | - | 0.2 * VCC | V |
| Operating Free-Air Temperature (TA) | -40 | - | 85 | °C |
| Data Signaling Rate | - | - | 1000 kbit/s | - |
| ESD Protection (Human-Body Model) | - | - | ±15 kV | - |
| ESD Protection (IEC 61000-4-2, Contact Discharge) | - | - | ±8 kV | - |
| ESD Protection (IEC 61000-4-2, Air-Gap Discharge) | - | - | ±15 kV | - |
Key Features
- Operates with a 3-V to 5.5-V VCC supply, allowing flexibility in system design.
- Meets or exceeds TIA/EIA-232-F and ITU v.28 standards for RS-232 compatibility.
- Includes two line drivers and two line receivers, providing a complete serial communication interface.
- Dual charge-pump circuit for generating the necessary voltage levels from a single supply.
- Low standby current of 1 μA (typical) when in power-down mode.
- High ESD protection: ±15-kV Human-Body Model (HBM), ±8-kV IEC 61000-4-2 Contact Discharge, and ±15-kV IEC 61000-4-2 Air-Gap Discharge.
- Supports data signaling rates up to 1000 kbit/s.
- External capacitors required: 4 × 0.1 μF for typical operation.
- Accepts 5-V logic input with a 3.3-V supply.
Applications
- Industrial PCs and embedded systems.
- Wired networking and data center equipment.
- Notebooks and other portable devices.
- Hand-held equipment and mobile devices.
- Any application requiring reliable RS-232 serial communication.
Q & A
- What is the operating voltage range of the SN65C3222EPW?
The SN65C3222EPW operates with a supply voltage range of 3-V to 5.5-V.
- What are the ESD protection levels of the SN65C3222EPW?
The device offers ±15-kV Human-Body Model (HBM), ±8-kV IEC 61000-4-2 Contact Discharge, and ±15-kV IEC 61000-4-2 Air-Gap Discharge ESD protection.
- How many drivers and receivers does the SN65C3222EPW have?
The device includes two line drivers and two line receivers.
- What is the maximum data signaling rate supported by the SN65C3222EPW?
The device supports data signaling rates up to 1000 kbit/s.
- What is the standby current when the device is in power-down mode?
The standby current is 1 μA (typical) when in power-down mode.
- What are the typical applications of the SN65C3222EPW?
Typical applications include industrial PCs, wired networking, data center equipment, notebooks, and hand-held devices.
- Does the SN65C3222EPW require external voltage regulators?
No, the device includes a dual charge-pump circuit that allows operation from a single 3-V to 5.5-V supply.
- How many external capacitors are required for the SN65C3222EPW?
The device requires four external capacitors (4 × 0.1 μF) for typical operation.
- Can the SN65C3222EPW accept 5-V logic input with a 3.3-V supply?
- What is the operating temperature range of the SN65C3222EPW?
The operating free-air temperature range is -40°C to 85°C.
