Overview
The SN65C3232ED, produced by Texas Instruments, is a dual-channel RS-232 transceiver designed to provide a reliable and efficient interface between asynchronous communication controllers and serial-port connectors. This device is part of the SN65C3232 and SN75C3232 family, which offers robust ESD protection and operates over a wide voltage range. It is suitable for various applications requiring RS-232 communication, including industrial PCs, wired networking, data centers, and battery-powered systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VCC) | 3 to 5.5 | V |
| Data Signaling Rate | Up to 1 Mbit/s | |
| Supply Current (Typical) | 300 μA | |
| ESD Protection (HBM) | ±15 kV | |
| ESD Protection (IEC 61000-4-2 Air-Gap Discharge) | ±15 kV | |
| ESD Protection (IEC 61000-4-2 Contact Discharge) | ±8 kV | |
| Operating Free-Air Temperature (SN65C3232E) | –40 to 85°C | |
| Operating Free-Air Temperature (SN75C3232E) | 0 to 70°C | |
| Driver Output Slew Rate | 14 V/μs to 150 V/μs | |
| External Capacitors | 4 × 0.1 μF |
Key Features
- Operates with a 3-V to 5.5-V VCC supply.
- Supports data signaling rates up to 1 Mbit/s.
- Low supply current: 300 μA typical.
- Accepts 5-V logic input with a 3.3-V supply.
- ±15-kV ESD protection for RS-232 pins using the Human-Body Model (HBM) and IEC 61000-4-2 standards.
- Latch-up performance exceeds 100 mA per JESD 78, Class II.
- Includes two line drivers, two line receivers, and a dual charge-pump circuit.
- Outputs are protected against shorts to ground.
Applications
- Industrial PCs
- Wired networking
- Data center and enterprise computing
- Battery-powered systems
- Notebooks and laptops
- Palmtop PCs and hand-held equipment
Q & A
- What is the operating voltage range of the SN65C3232ED?
The SN65C3232ED operates with a supply voltage (VCC) ranging from 3 V to 5.5 V.
- What is the maximum data signaling rate supported by the SN65C3232ED?
The device supports data signaling rates up to 1 Mbit/s.
- What is the typical supply current of the SN65C3232ED?
The typical supply current is 300 μA.
- Does the SN65C3232ED support 5-V logic input with a 3.3-V supply?
- What level of ESD protection does the SN65C3232ED offer?
The device offers ±15-kV ESD protection using the Human-Body Model (HBM) and IEC 61000-4-2 standards.
- What components are required for the charge pump operation?
The charge pump requires four external capacitors (4 × 0.1 μF).
- What is the operating temperature range for the SN65C3232E and SN75C3232E?
The SN65C3232E operates from –40°C to 85°C, while the SN75C3232E operates from 0°C to 70°C.
- How many line drivers and receivers does the SN65C3232ED have?
The device includes two line drivers and two line receivers.
- What is the driver output slew rate of the SN65C3232ED?
The driver output slew rate ranges from 14 V/μs to 150 V/μs.
- Are the outputs of the SN65C3232ED protected against shorts to ground?
