The MAX3230E/AE and MAX3231E/AE are +2.5V to
+5.5V powered EIA/TIA-232 and V.28/V.24 communications
interfaces with low power requirements, high datarate
capabilities, and enhanced electrostatic discharge
(ESD) protection, in a chip-scale package (UCSP?)
and WLP package. All transmitter outputs and receiver
inputs are protected to ±15kV using IEC 1000-4-2 Air-
Gap Discharge, ±8kV using IEC 1000-4-2 Contact
Discharge, and ±15kV using the Human Body Model.
The MAX3230E/AE and MAX3231E/AE achieve a 1μA
supply current with Maxim’s AutoShutdown? feature.
They save power without changing the existing BIOS or
operating systems by entering low-power shutdown
mode when the RS-232 cable is disconnected, or when
the transmitters of the connected peripherals are off.
The transceivers have a proprietary low-dropout transmitter
output stage, delivering RS-232-compliant performance
from a +3.1V to +5.5V supply, and RS-232-
compatible performance with a supply voltage as low
as +2.5V. The dual charge pump requires only four,
small 0.1μF capacitors for operation from a +3.0V supply.
Each device is guaranteed to run at data rates of
250kbps while maintaining RS-232 output levels.
The MAX3230E/AE and MAX3231E/AE offer a separate
power-supply input for the logic interface, allowing configurable
logic levels on the receiver outputs and transmitter
inputs. Operating over a +1.65V to VCC range, VL
provides the MAX3230E/AE and MAX3231E/AE compatibility
with multiple logic families.
The MAX3231E/AE contains one receiver and one transmitter.
The MAX3230E/AE contains two receivers and two
transmitters. The MAX3230E/AE and MAX3231E/AE are
available in tiny chip-scale and WLP packaging and are
specified across the extended industrial (-40°C to +85°C)
temperature range.