Deco

'46A, '47A, 'LS47
feature

• Open-Collector Outputs
Orive lndicators Directly

• Lamp-Test Provision

• Leading/Trailing Zero
Suppression

'48, 'LS48
feature

• Interna! Puii-Ups Eliminate
Need for Externa! Resistors

• lamp-Test Provision

• leading/Trailing Zero
Suppression

'LS49
feature

• Open-Collector Outputs

• Blanking Input

SN5446A,SN5447A,SN54LS47, SN5448,SN54LS48 ... J PACKAGE SN7446A, SN7447A.
SN7448 . .. N PACKAGE SN74LS47,SN74LS48 ... D OR N PACKAGE (TOP VIEWI
8 vee

SN54LS47, SN54LS48 ••• FK PACKAGE
ITOP VIEWI

u
u u
u coz>-

-- LT g

e f
-- LT g
81/R80 a
R81 b D e A d
GND e

SN54LS49 . •• J OR W PACKAGE SN74LS49 ••.D OR N PACKAGE ITOP VIEWI

8 vcc
e f
81 g D a Ab e e
GND d

81/RBO a NC NC R81 b
D e

SN54LS49 • . . FK PACKAGE
CTOP VIEW)
u u
u u
coz>-

81 g NC NC D a
NC NC
A b

QlOU"'u
zz
(!}

NC - No internal connection

PRODUC TION DATA information is current as of pubilcation date. Products conform to specifications per the terms of Texas lnstruments standard warranty.Production processing does notnecessarily inelude testing of all parameters.

.TEXAS

Copyright © 1988, Texas lnstruments lncorporated

SN5446A, '47A, '48, SN54LS47, 'LS48, 'LS49
SN7446A, '47A, '48, SN74LS47, 'LS48, 'LS49
BCD-TO-SEVEN-SEGMENT DECODERS/DRIVERS
SDLS111- MARCH 1974- REVISEO MARCH 1988

• All Circuit Types Feature Lamp lntensity Modulation Capability

TYPE | DRIVER OUTPUTS | TYPICAL POWERDISSIPATION |PACKAGES |
| ACTIVELEVEL | OUTPUTCONFIGURATION | SINKCURRENT | MAXVOLTAGE | | |
SN5446A SN5447ASN5448 | low lowhigh | open-collector open-collector2-kO pull-up | 40mA40 mA6.4 mA | 30 V15 V5.5 V | 320 mW320mW265 mW | J, wJ,W J,W |
SN54LS47SN54LS48SN54LS49 | lowhigh high | open-collector2-kO pull-up open-collector | 12 mA2 mA4 mA | 15 V5.5 V5.5 V | 35mW125 mW40mW | J,W J,WJ, w |SN7446A SN7447ASN7448 | low lowhigh | open-collector open-collector2-kO pull-up | 40 mA40 mA6.4 mA | 30 V15 V5.5 V | 320 mW320 mW265 mW | J, N J, NJ, N |
SN74LS47SN74LS48SN74LS49 | lowhigh high | open-collector2-kO pull-up open-collector | 24 mA6 mA8 mA | 15 V5.5 V5.5 V | 35mW125 mW40mW | J, N J, NJ,N |

logic symbols t

'46A, '47A, 'LS47 '48, 'LS48

(4)
Bi¡RiiQ ,

...1-:::

BIN/7.SEG [>
[Tl)
;;.1

Bi/R80

BIN/7-SEG
;;.1
(4) .... IT2J
L..:::

(5) ......
RBI 8c

G21

RBI (5) ...... 8c

G21

rr (3)

[i' (3)

cT oL
...t:::.. V20 a 2ii:21 O' (13) •

CT•oL
l...t::.. V20 a 20,21

(131

1
A
(7) b 20,21 o (12) b
(1) e 20,210 ...... (11) e

(7) b 20,21 (121 b
A 1
(1) e20,21 ( 11) e

B 2 d 20,210 ..... (10) d

B 2 (10)
d | 20,21 |
e | 20,21 |
f | 20,21 |
g | 20,21 |

d

e (2) 4 • 20,21 o .... (9)

e (21 4 (9) •

o (6) 8 f 20,21 o (15)
9 20,210 .... (14)

o (6) 8

(151
(141
g

'LS49

iii

131

G20

BIN/7-SEG (T31

A (51 ( 111 a
b
e
(1)
B 2
d
e 2 4

o 141 8

trhesesymbols are in accordance with ANSI/IEEE Std 91-1984 and lEC Publication 617-12.
Pin numbers shown are for D, J, N, and W packages.

• TEXAS INSTRUMENTS
2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

description

The '46A, '47A, and 'LS47 feature active-low outputs designed for driving common-anode LEDs or incandescent indicators directly. The '48, 'LS48, and 'LS49 featureactive-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 input counts above 9 are unique symbols to authenticate input conditions.

The...