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Craft Port™ Tiny RS-232 Transceiver for
Portable Applications
Data Sheet
ADM101E
FEATURES
460 kbit/s Transmission Rate
Single 5 V Power Supply
Compatible with RS-232 Input/Output Levels
0.1 μF Charge Pump Capacitors
One Driver and One Receiver
On-Board DC-DC Converter
±4.2 V Output Swing with 5 V Supply
Low Power BiCMOS: 500 μA I
CC
Ultralow Power (1 μA) Shutdown Mode
10-Lead MSOP Package
Qualified for Automotive Applications
APPLICATIONS
Mobile Telephones
Palmtop Computers
PDAs
Portable Instrumentation
GPS Receivers
FUNCTIONAL BLOCK DIAGRAM
Figure 1.
GENERAL DESCRIPTION
The ADM101E is a single channel RS-232 driver and receiver in
the Analog Devices Craft Port series, designed to operate from a
single, 5 V supply. A highly efficient charge-pump voltage inverter
generates an on-chip −5 V supply, which eliminates the need for
a negative power supply for the driver and permits RS-232
compatible output levels to be developed using charge pump
capacitors as small as 0.1 μF.
A shutdown input disables the charge pump and puts the device
into a low power shutdown mode, in which the current
consumption is typically less than 1 μA. The transmitter is
disabled during shutdown but the receiver remains functional.
An epitaxial BiCMOS construction minimizes power consumption
to 3 mW and also guards against latch-up. Overvoltage protection
is provided allowing the receiver inputs to withstand continuous
voltages in excess of ±30 V. In addition, all I-O pins have ESD
protection to levels greater than 15 kV.
The ADM101E is available in a 10-lead MSOP package, which
makes it ideal for serial communications in small, portable
applications such as palmtop computers and mobile telephones,
where a full, RS-232 serial interface is not required, but compact
size and low power drain are paramount.
Craft Port is a trademark of Analog Devices, Inc.
Rev. B Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2001–2014 Analog Devices, Inc. All rights reserved.
Technical Support www.analog.com
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