Samsung Wingo S-2450, Руководство по обслуживанию

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Samsung Electronics 10-3
IC Internal Diagram
AC Electrical Characteristics
MM74HCT245
V
CC
e
5(0V* t
r
e
t
f
e
6 ns* T
A
e
25 C (unless otherwise specified)
Symbol Parameter Conditions Typ
Guaranteed
Units
Limit
t
PHL
* t
PLH
Maximum Output C
L
e
45 pF 16 20 ns
Propagation Delay
t
PZL
* t
PZH
Maximum Output C
L
e
45 pF 29 40 ns
Enable Time R
L
e
1 k
X
t
PLZ
* t
PHZ
Maximum Output C
L
e
5 pF 20 25 ns
Disable Time R
L
e
1 k
X
AC Electrical Characteristics
MM74HCT245
V
CC
e
5(0V
g
10%* t
r
e
t
f
e
6 ns (unless otherwise specified)
T
A
e
25 C
74HCT
T
A
e
125 C
Symbol Parameter Conditions
T
A
e b
40 to 85 C
Units
Typ Guaranteed Limits
t
PHL
* t
PLH
Maximum Output C
L
e
50 pF 17 23 29 34 ns
Propagation Delay
C
L
e
150 pF 24 30 38 45 ns
t
PZL
Maximum Output R
L
e
1 k
X
31 42 53 63 ns
Enable Time C
L
e
50 pF
t
PZH
Maximum Output R
L
e
1 k
X
23 33 41 49 ns
Enable Time C
L
e
50 pF
t
PHZ
* t
PLZ
Maximum Output R
L
e
1 k
X
21 30 38 45 ns
Disable Time C
L
e
50 pF
t
THL
* t
TLH
Maximum Output C
L
e
50 pF 8 12 15 18 ns
Rise and Fall Time
C
IN
Maximum Input 10 15 15 15 pF
Capacitance
C
OUT
Maximum OutputInput 20 25 25 25 pF
Capacitance
C
PD
Power Dissipation (Note 5) G
e
V
CC
7 pF
Capacitance GND G
e
100 pF
Note 56 C
PD
determines the no load power consumption* P
D
e
C
PD
V
CC
2
f
a
I
CC
V
CC
* and the no load dynamic current consumption* I
S
e
C
PD
V
CC
f
a
I
CC
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