HD74LS247
BCD-to-Seven-Segment Decoder / Driver
(with three-state outputs)
REJ03D0465–0300
Rev.3.00
Jul.15.2005
The HD74LS247 is electrically and functionally identical to the HD74LS47, respectively, and has the same pin
assignments as its equivalents.
It can be used interchangeably in present or future designs to offer designers a choice between two indicator fonts. The
HD74LS47 composes the 6 and the 9 without tails and the HD74LS247 composes the 6 and the 9 with tails.
Composition of all other characters, including display patterns for BCD inputs above nine, is identical. The
HD74LS247 features active-low outputs designed for driving indicators directly. All of the circuits have full rippleblanking input / output controls and a lamp test input.
Segment identification and resultant displays are shown below. Display patterns for BCD input conditions. This circuit
incorporates automatic leading and / or trailing-edge zero-blanking control (RBI and RBO). Lamp test (LT) of this type
may be performed at any time when the BI / RBO node is at a high level.
This type contains an overriding blanking input (BI) which can be used to control the lamp intensity be pulsing or to
inhibit the outputs.
Features
• Ordering Information
Part Name
Package Type
Package Code
(Previous Code)
Package
Abbreviation
Taping Abbreviation
(Quantity)
HD74LS247P
DILP-16 pin
PRDP0016AE-B
(DP-16FV)
P
—
HD74LS247FPEL
SOP-16 pin (JEITA)
PRSP0016DH-B
(FP-16DAV)
FP
EL (2,000 pcs/reel)
HD74LS247RPEL
SOP-16 pin (JEDEC)
PRSP0016DG-A
(FP-16DNV)
RP
EL (2,500 pcs/reel)
Note: Please consult the sales office for the above package availability.
Rev.3.00, Jul.15.2005, page 1 of 7
