參數(shù)資料
型號(hào)： 74LCXH245WM
廠商： FAIRCHILD SEMICONDUCTOR CORP
元件分類(lèi)： 通用總線功能
英文描述： Low Voltage Bidirectional Transceiver with Bushold
中文描述： LVC/LCX/Z SERIES, 8-BIT TRANSCEIVER, TRUE OUTPUT, PDSO20
封裝： 0.300 INCH, MS-013, SOIC-20
文件頁(yè)數(shù)： 4/10頁(yè)
文件大小： 197K
代理商： 74LCXH245WM
www.fairchildsemi.com
4
7
DC Electrical Characteristics
(Continued)
Note 5:
Outputs disabled or 3-STATE only.
Note 6:
An external driver must source at least the specified current to switch from LOW-to-HIGH.
Note 7:
An external driver must sink at least the specified current to switch from HIGH-to-LOW.
AC Electrical Characteristics
Note 8:
Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device. The
specification applies to any outputs switching in the same direction, either HIGH-to-LOW (t
OSHL
) or LOW-to-HIGH (t
OSLH
).
Dynamic Switching Characteristics
Capacitance
Symbol
Parameter
Conditions
V
CC
(V)
T
A
=
40
°
C to
+
85
°
C
Min
45
45
75
75
300
300
450
450
Units
Max
I
I(HOLD)
Bushold Input Minimum
Drive Hold Current
V
IN
=
0.7V
V
IN
=
1.7V
V
IN
=
0.8V
V
IN
=
2.0V
(Note 6)
2.3
μ
A
3.0
I
I(OD)
Bushold Input Over-Drive
2.7
μ
A
Current to Change State
(Note 7)
(Note 6)
(Note 7)
V
O
=
V
CC
or GND
V
I
=
V
CC
or GND
3.6V
≤
V
I
, V
O
≤
5.5V (Note 5)
V
IH
=
V
CC
0.6V
3.6
I
OZ
I
CC
3-STATE I/O Leakage
Quiescent Supply Current
2.3
3.6
2.3
3.6
2.3
3.6
2.3 - 3.6
±
5.0
10
±
10
500
μ
A
μ
A
I
CC
Increase in I
CC
per Input
μ
A
Symbol
Parameter
T
A
=
40
°
C to
+
85
°
C, R
L
=
500
V
CC
=
2.7V
C
L
=
50 pF
Min
1.5
1.5
Units
V
CC
=
3.3V
±
0.3V
C
L
=
50 pF
Min
1.5
1.5
V
CC
=
2.5V
±
0.2V
C
L
=
30 pF
Min
1.5
1.5
Max
7.0
7.0
Max
8.0
8.0
Max
t
PHL
t
PLH
t
PZL
t
PZH
t
PLZ
t
PHZ
t
OSHL
t
OSLH
Propagation Delay
A
n
to B
n
or B
n
to A
n
Output Enable Time
8.4
8.4
ns
1.5
1.5
8.5
8.5
1.5
1.5
9.5
9.5
1.5
1.5
10.5
10.5
ns
Output Disable Time
1.5
1.5
7.5
7.5
1.0
1.5
1.5
8.5
8.5
1.5
1.5
9.0
9.0
ns
Output to Output Skew
ns
(Note 8)
1.0
Symbol
Parameter
Conditions
V
CC
(V)
3.3
2.5
3.3
T
A
=
25
°
C
Typical
0.8
0.6
0.8
0.6
Units
V
OLP
Quiet Output Dynamic Peak V
OL
C
L
=
50 pF, V
IH
=
3.3V, V
IL
=
0V
C
L
=
30 pF, V
IH
=
2.5V, V
IL
=
0V
C
L
=
50 pF, V
IH
=
3.3V, V
IL
=
0V
C
L
=
30 pF, V
IH
=
2.5V, V
IL
=
0V
V
V
OLV
Quiet Output Dynamic Valley V
OL
V
2.5
Symbol
Parameter
Conditions
Typical
7
Units
pF
C
IN
C
I/O
C
PD
Input Capacitance
V
CC
=
Open, V
I
=
0V or V
CC
V
CC
=
3.3V, V
I
=
0V or V
CC
V
CC
=
3.3V, V
I
=
0V or V
CC
, f
=
10 MHz
Input/Output Capacitance
Power Dissipation Capacitance
8
pF
pF
25
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