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Access Control
Vehicle Identification
Container Tracking
Asset Management
Waste Management
DESCRIPTION
The Texas Instruments鈥?low-frequency (LF) reader provides all the functionality required to communicate with
Texas Instruments 134.2 kHz LF transponders which are available in a variety of form factors. The RI-STU-251B
Reader/Writer is capable driving a variety of antennas with inductance ranges from 26.0碌H to 27.9碌H including
TI standard antennas RI-ANT-G01E, RI-ANT-G02E, RI-ANT-G04E gate antennas as well as RI-ANT-S01C and
RI-ANT-S02C stick antennas. The RI-STU-251B includes an automatic antenna resonance tuning feature which
further reduces the need for maintenance and simplifies installation. It also supports both RS232 and RS422/485
interface standards.
The RI-STU-251B is well suited for usage in a broad range of applications including, but not limited to, access
control, vehicle identification, container tracking, asset management and waste management applications.
The Series 2000 Reader S251B provides all RF and Control Functions to communicate with 134.2 kHz
HDX/FSK transponders. It sends an energizing signal to the transponder, modulates the RF signal to send data
to the transponder, decodes and checks the received transponder data and transmits it via a standard serial
interface (RS232, RS422/485). The reader includes a Dynamic Auto Tuning (DAT) function that automatically
tunes a standard antenna to resonance and keeps it tuned during operation.
ABSOLUTE MAXIMUM RATINGS
(1)
over operating free-air temperature range (unless otherwise noted)
RI-STU-251B
Operating Temperature
Storage Temperature
(1)
鈥?0 to +70 (depending on power consumption)
鈥?0 to +85
UNIT
擄C
擄C
Stresses beyond those listed under
Absolute Maximum Ratings
may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under
Recommended Operating
Conditions
is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
TIRIS is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright 漏 2001, Texas Instruments Incorporated
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