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HD74LS190 Datasheet, PDF (4/11 Pages) Hitachi Semiconductor – Synchronous Up/Down Decade Counters(single clock line) | |||
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HD74LS190
Recommended Operating Conditions
Item
Supply voltage
Output current
Operating temperature
Clock frequency
Clock pulse width
Load pulse width
Setup time
Hold time
Enable time
Symbol
VCC
IOH
IOL
Topr
Æclock
tw (CK)
tw (Load)
tsu
th (data)
tenable
Min
4.75
â
â
â20
0
25
35
20
3
40
Typ
5.00
â
â
25
â
â
â
â
â
â
Max
5.25
â400
8
75
20
â
â
â
â
â
Unit
V
µA
mA
°C
MHz
ns
ns
ns
ns
ns
Electrical Characteristics
Item
Symbol
min.
typ.* max.
Unit
Input voltage
VIH
2.0
â
â
V
VIL
â
â
0.8
V
VOH
2.7
â
â
V
Output voltage
â
â
0.4
VOL
V
â
â
0.5
Enable
â
â
60
Others
IIH
µA
â
â
20
Input
Enable
â
â
â1.2
current Others
IIL
mA
â
â
â0.4
Enable
â
â
0.3
Others
II
mA
â
â
0.1
Short-circuit output
current
IOS
â20
â
â100
mA
Supply current**
ICC
â
20
35
mA
Input clamp voltage
VIK
â
â
â1.5
V
Notes: * VCC = 5 V, Ta = 25°C
** ICC is measured with all outputs open and all inputs grounded.
(Ta = â20 to +75 °C)
Condition
VCC = 4.75 V, VIH = 2 V, VIL = 0.8 V,
IOH = â400 µÎ
IOL = 4 mA VCC = 4.75 V, VIH = 2 V,
IOL = 8 mA VIL = 0.8 V
VCC = 5.25 V, VI = 2.7 V
VCC = 5.25 V, VI = 0.4 V
VCC = 5.25 V, VI = 7 V
VCC = 5.25 V
VCC = 5.25 V
VCC = 4.75 V, IIN = â18 mA
Rev.3.00, Jul.15.2005, page 4 of 10
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