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Renesas Electronics Components Datasheet

HD74LS47P Datasheet

BCD-to-Seven-Segment Decoder/Driver

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HD74LS47
BCD-to-Seven-Segment Decoder / Driver (with 15 V Outputs)
REJ03D0410-0301
Rev.3.01
May 10, 2006
HD74LS47 features active-low outputs designed for driving incandescent indicators directly. This device has full
ripple-blanking input / output controls and a lamp test. Display patterns for BCD input counts above 9 are unique
symbols to authenticate input conditions. This circuit incorporates automatic leading and / or trailing-edge zero-
blanking control (RBI and RBO). Lamp test (LT) of these types may be performed at any time when the BI / RBO
node is at a high level. It contains an overriding blanking input (BI) which can be used to control the lamp intensity of
pulsing or to inhibit the outputs. Inputs and outputs are entirely compatible for use with TTL or DTL logic outputs.
Features
Ordering Information
Part Name
Package Type
Package Code
(Previous Code)
Package
Abbreviation
HD74LS47P
DILP-16 pin
PRDP0016AE-B
P
(DP-16FV)
HD74LS47FPEL SOP-16 pin (JEITA)
PRSP0016DH-B
(FP-16DAV)
FP
Note: Please consult the sales office for the above package availability.
Taping Abbreviation
(Quantity)
EL (2,000 pcs/reel)
Pin Arrangement
B1
Inputs
C2
LT 3
BI/RBO 4
RBI 5
D6
Inputs
A7
GND 8
B
f
C
g
LT
a
BI/RBO b
RBI
c
D
d
A
e
16 VCC
15 f
14 g
13 a
12 b Outputs
11 c
10 d
9e
(Top view)
Rev.3.01, May 10, 2006, page 1 of 6


Renesas Electronics Components Datasheet

HD74LS47P Datasheet

BCD-to-Seven-Segment Decoder/Driver

No Preview Available !

HD74LS47
Function Table
Decimal or
Inputs
BI/
Outputs
Function LT RBI D C B A RBO a
b
c
d
e
f
Note
g
0
H H LLLL
H
ON ON ON ON ON ON OFF
1
H X LLLH
H OFF ON ON OFF OFF OFF OFF
2
H X LLHL
H
ON ON OFF ON ON OFF ON
3
H X L LHH
H
ON ON ON ON OFF OFF ON
4
H X LHL L
H OFF ON ON OFF OFF ON ON
5
H X LHLH
H
ON OFF ON ON OFF ON ON
6
H X LHHL
H OFF OFF ON ON ON ON ON
7
H X LHHH
H
ON ON ON OFF OFF OFF OFF
1
8
H X HLLL
H
ON ON ON ON ON ON ON
9
H X HLLH
H
ON ON ON OFF OFF ON ON
10
H X HLHL
H OFF OFF OFF ON ON OFF ON
11
H X HLHH
H OFF OFF ON ON OFF OFF ON
12
H X HHL L
H OFF ON OFF OFF OFF ON ON
13
H X HHLH
H
ON OFF OFF ON OFF ON ON
14
H X HHHL
H OFF OFF OFF ON ON ON ON
15
H X HHHH
H OFF OFF OFF OFF OFF OFF OFF
BI
X X XXXX
L OFF OFF OFF OFF OFF OFF OFF 2
RBI
H L LLLL
L OFF OFF OFF OFF OFF OFF OFF 3
LT
L X XXXX
H
ON ON ON ON ON ON ON 4
H; high level, L; low level, X, irrelevant
Notes: 1. The blanking input (BI) must be open or held at a high logic level when output functions 0 through 15 are
desired. The ripple-blanking input (RBI) must be open or high if blanking of a decimal zero is not desired.
2. When a low logic level is applied directly to the blanking input (BI), all segment outputs are off regardless of
the level of any other input.
3. When ripple-blanking input (RBI) and inputs A, B, C, and D are a low level with the lamp test input high, all
segment outputs go off and the ripple-blanking output (RBO) goes to a low level (response condition).
4. When a blanking input / ripple blanking output (BI / RBO) is open or held high and a low is applied to the
lamp-test input, all segment outputs are on.
a
f gb
e
c
d 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Rev.3.01, May 10, 2006, page 2 of 6


Part Number HD74LS47P
Description BCD-to-Seven-Segment Decoder/Driver
Maker Renesas
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HD74LS47P Datasheet PDF






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