Overview
The MAX3232ECDB is a 3-V to 5.5-V multichannel RS-232 line driver and receiver produced by Texas Instruments. This device is designed to provide the electrical interface between an asynchronous communication controller and the serial-port connector, adhering to the TIA/EIA-232-F and ITU V.28 standards. It features a dual charge-pump circuit that allows operation from a single 3-V to 5.5-V supply, making it versatile for various applications. The MAX3232ECDB includes two line drivers and two line receivers, and it is notable for its high ESD protection and low power consumption.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 3.0 | 3.3 / 5.0 | 5.5 | V |
| Supply Current (No Load) | 0.3 | 1.0 | - | mA |
| Shutdown Supply Current | 1.0 | - | 10 | μA |
| Data Signaling Rate | - | - | 250 | kbit/s |
| Driver Output Slew Rate | - | - | 30 | V/μs |
| ESD Protection (HBM) | - | - | ±15 kV | - |
| ESD Protection (IEC61000-4-2) | - | - | ±8 kV (Contact), ±15 kV (Air-gap) | - |
| External Capacitors | - | - | 4 × 0.1 μF | - |
Key Features
- Operates with 3-V to 5.5-V VCC supply
- Meets or exceeds the requirements of TIA/EIA-232-F and ITU V.28 standards
- Two line drivers and two line receivers
- Low supply current: 300 μA typical
- External capacitors: 4 × 0.1 μF
- Accepts 5-V logic input with 3.3-V supply
- High ESD protection: ±15 kV (HBM), ±8 kV (IEC61000-4-2 Contact), ±15 kV (IEC61000-4-2 Air-gap)
- Pin compatible with alternative high-speed devices (e.g., SN65C3232E, SN75C3232E)
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 MAX3232ECDB?
The MAX3232ECDB operates with a supply voltage (VCC) ranging from 3.0 V to 5.5 V.
- How many line drivers and receivers does the MAX3232ECDB have?
The MAX3232ECDB includes two line drivers and two line receivers.
- What is the maximum data signaling rate of the MAX3232ECDB?
The device operates at data signaling rates up to 250 kbit/s.
- What kind of ESD protection does the MAX3232ECDB offer?
The device offers ±15 kV ESD protection using the human-body model (HBM) and ±8 kV (Contact) and ±15 kV (Air-gap) according to IEC61000-4-2.
- What external components are required for the MAX3232ECDB to operate?
The device requires four small external capacitors, each 0.1 μF.
- Is the MAX3232ECDB compatible with other high-speed devices?
Yes, it is pin compatible with alternative high-speed devices such as SN65C3232E and SN75C3232E.
- What are some typical applications of the MAX3232ECDB?
Typical applications include industrial PCs, wired networking, data center and enterprise computing, battery-powered systems, notebooks, laptops, and hand-held equipment.
- How does the MAX3232ECDB handle shutdown?
The device has a shutdown mode controlled by the SHDN pin, which reduces the supply current to 10 μA typical when active low.
- What is the driver output slew rate of the MAX3232ECDB?
The driver output slew rate is up to 30 V/μs.
- Can the MAX3232ECDB accept 5-V logic input with a 3.3-V supply?
Yes, the device can accept 5-V logic input even when the supply voltage is 3.3 V.
