REI Datasheet
LM131, LM131A, LM231, LM231A, LM331, LM331A
Precision Voltage-to-Frequency Converters
The LM131/LM231/LM331 family of voltage-to-frequency converters are ideally suited for use in
simple low-cost circuits for analog-to-digital conversion, precision frequency-to-voltage conversion,
long-term integration, linear frequency modulation or demodulation, and many other functions.
The output when used as a voltage-to-frequency converter is a pulse train at a frequency precisely
proportional to the applied input voltage. Thus, it provides all the inherent advantages of the voltage-
to-frequency conversion techniques, and is easy to apply in all standard voltage-to-frequency
converter applications. Further, the LM131A/LM231A/LM331A attains a new high level of accuracy
versus temperature which could only be attained with expensive voltage-to-frequency modules.
Rochester Electronics
Manufactured Components
Rochester branded components are
manufactured using either die/wafers
purchased from the original suppliers
or Rochester wafers recreated from the
original IP. All recreations are done with
the approval of the OCM.
Parts are tested using original factory
test programs or Rochester developed
test solutions to guarantee product
meets or exceeds the OCM data sheet.
Quality Overview
•
•
•
•
ISO-9001
AS9120 certification
Qualified Manufacturers List (QML) MIL-PRF-38535
•
Class Q Military
•
Class V Space Level
Qualified Suppliers List of Distributors (QSLD)
•
Rochester is a critical supplier to DLA and
meets all industry and DLA standards.
Rochester Electronics, LLC is committed to supplying
products that satisfy customer expectations for
quality and are equal to those originally supplied by
industry manufacturers.
The original manufacturer’s datasheet accompanying this document reflects the performance
and specifications of the Rochester manufactured version of this device. Rochester Electronics
guarantees the performance of its semiconductor products to the original OEM specifications.
‘Typical’ values are for reference purposes only. Certain minimum or maximum ratings may be
based on product characterization, design, simulation, or sample testing.
© 2014 Rochester Electronics, LLC. All Rights Reserved 01152014
To learn more, please visit
www.rocelec.com