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PDF 74LS247 Data sheet ( Hoja de datos )
| Número de pieza | 74LS247 | |
| Descripción | LOW POWER SCHOTTKY | |
| Fabricantes | ON Semiconductor | |
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Hay una vista previa y un enlace de descarga de 74LS247 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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SN74LS247
BCD-to-Seven-Segment
Decoders/Drivers
The SN74LS247 is a BCD-to-Seven-Segment Decoder/Drivers.
The LS247 composes the and with the tails. The LS247 has
active-low outputs for direct drive of indicators.
The LS247 features a lamp test input and have full ripple-blanking
input/output controls. An automatic leading and/or trailing-edge
zero-blanking control (RBI and RBO) is incorporated and an
overriding blanking input (BI) is contained which may be used to
control the lamp intensity by pulsing or to inhibit the output’s lamp test
may be performed at any time when the BI/RBO node is at high level.
Segment identification and resultant displays are shown below.
Display pattern for BCD input counts above 9 are unique symbols to
authenticate input conditions.
• Open-Collector Outputs Drive Indicators Directly
• Lamp-Test Provision
• Leading/ Trailing Zero Suppression
GUARANTEED OPERATING RANGES
Symbol
Parameter
Min Typ Max Unit
VCC Supply Voltage
TA Operating Ambient
Temperature Range
4.75 5.0 5.25
V
0 25 70 °C
IOH Output Current – High
BI/RBO
– 50 mA
IOL Output Current – Low
BI/RBO
3.2 mA
VO(off)
Off–State Output Voltage
a–g
15 V
IO(on)
On–State Output Current
a–g
24 mA
http://onsemi.com
LOW
POWER
SCHOTTKY
16
1
PLASTIC
N SUFFIX
CASE 648
16
1
SOIC
D SUFFIX
CASE 751B
ORDERING INFORMATION
Device
Package
Shipping
SN74LS247N 16 Pin DIP 2000 Units/Box
SN74LS247D
16 Pin
2500/Tape & Reel
© Semiconductor Components Industries, LLC, 1999
December, 1999 – Rev. 6
1
Publication Order Number:
SN74LS247/D
1 page  
SN74LS247
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol
Parameter
Min Typ Max Unit
Test Conditions
VIH Input HIGH Voltage
2.0
V
Guaranteed Input HIGH Voltage for
All Inputs
VIL Input LOW Voltage
0.8
V
Guaranteed Input LOW Voltage for
All Inputs
VIK
VOH
VOL
Input Clamp Diode Voltage
Output HIGH Voltage
BI / RBO
Output LOW Voltage
BI / RBO
– 0.65 – 1.5 V VCC = MIN, IIN = – 18 mA
2.4 4.2
V
VCC = MIN, IOH = MAX, VIN = VIH
or VIL per Truth Table
0.25 0.4
0.35 0.5
V IOL = 1.6 mA
V IOL = 3.2 mA
VCC = VCC MIN,
VIN = VIL or VIH
per Truth Table
IO(off)
VO(on)
IIH
IIL
Off-State Output Current
a–g
On-State Output Voltage
a–g
Input HIGH Current
Input LOW Current
Any Input, except BI / RBO
BI / RBO
250
0.25 0.4
0.35 0.5
20
0.1
µA
VCC = MAX, VIH = 2.0 V,
VO(off) = 15 V, VIL = MAX
V
IO(on) = 12 mA
VCC = MIN, VIH = 2.0 V,
V
IO(on) = 24 mA
VIL per Truth Table
µA VCC = MAX, VIN = 2.7 V
mA VCC = MAX, VIN = 7.0 V
– 0.4 mA VCC = MAX, VIN = 0.4 V
– 1.2
Short Circuit Current
IOS BI / RBO (Note 1)
– 0.3
– 2.0 mA VCC = MAX
ICC Power Supply Current
7.0 13 mA VCC = MAX
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
AC CHARACTERISTICS (VCC = 5.0 V, TA = 25°C)
Symbol
tPLH
tPHL
tPHL
tPLH
Parameter
Turn-Off Time from A Input
Turn-On Time from A Input
Turn-Off Time from RBI Input
Turn-On Time from RBI Input
Min
Limits
Typ
Max
100
100
100
100
Unit
ns
ns
Test Conditions
CL = 15 pF,
RL = 665 Ω
http://onsemi.com
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet 74LS247.PDF ] | |
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