REI Datasheet
SN5446A, ‘47A, ‘48, ‘LS47, ‘LS48, ‘LS49
SN7446A, ‘47A, ‘48, ‘LS47, ‘LS48, ‘LS49
BCD-To-Seven-Segment Decoders/Drivers
The ‘46A, ‘47A, and ‘LS47 feature active-low outputs designed for driving common-anode LEDs or
incandescent indicators directly. The ‘48, ‘LS48, and ‘LS49 feature active-high outputs for driving
lamp buffers or common-cathode LEDs. All of the circuits except ‘LS49 have full ripple-blanking input/
output controls and a lamp test input. The ‘LS49 circuit incorporates a direct blanking input. Segment
identification and resultant displays are shown below. Display patterns for BCD inputs counts above
9 are unique symbols to authenticate input conditions.
Quality Overview
Rochester Electronics
Manufactured Components
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ISO-9001
AS9120 certification
Qualified Manufacturers List (QML) MIL-PRF-38535
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.
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Class Q Military
Class V Space Level
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Qualified Suppliers List of Distributors (QSLD)
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Rochester is a critical supplier to DLA and
meets all industry and DLA standards.
Parts are tested using original factory
test programs or Rochester developed
test solutions to guarantee product
meets or exceeds the OCM data sheet.
RochesterElectronics, LLCiscommittedtosupplying
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.
© 2013 Rochester Electronics, LLC. All Rights Reserved 10152013
To learn more, please visit www.rocelec.com
ROCHESTER [ Rochester Electronics ]
