參數(shù)資料
型號(hào): 74LCX245
廠(chǎng)商: Toshiba Corporation
英文描述: LOW VOLTAGE OCTAL BUS TRANSCEIVER WITH 5V TOLERANT INPUTS AND OUTPUTS
中文描述: 低壓八路總線(xiàn)收發(fā)器和5V容限輸入和輸出
文件頁(yè)數(shù): 5/13頁(yè)
文件大?。?/td> 278K
代理商: 74LCX245
74LCX245
5/13
Table 8: AC Electrical Characteristics
1) Skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs of the same device switch-
ing in the same direction, either HIGH or LOW (t
OSLH
= | t
PLHm
- t
PLHn
|, t
OSHL
= | t
PHLm
- t
PHLn
|)
2) Parameter guaranteed by design
Table 9: Capacitive Characteristics
1) C
is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without
load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. I
CC(opr)
= C
PD
x V
CC
x f
IN
+ I
CC
/8 (per circuit)
Symbol
Parameter
Test Condition
Value
Unit
V
CC
(V)
C
L
(pF)
R
L
(
)
t
s
=
t
r
(ns)
-40 to 85 °C
-55 to 125 °C
Min.
Max.
Min.
Max.
t
PLH
t
PHL
Propagation Delay
Time
2.7
50
500
2.5
1.5
1.5
1.5
1.5
1.5
1.5
8.0
7.0
9.5
8.5
8.5
7.5
1.0
1.5
1.5
1.5
1.5
1.5
1.5
9.2
8.1
10.7
9.7
9.7
8.7
1.0
ns
3.0 to 3.6
2.7
3.0 to 3.6
2.7
3.0 to 3.6
3.0 to 3.6
t
PZL
t
PZH
Output Enable Time
50
500
2.5
ns
t
PLZ
t
PHZ
Output Disable Time
50
500
2.5
ns
t
OSLH
t
OSHL
Output To Output
Skew Time (note1,
2)
50
500
2.5
ns
Symbol
Parameter
Test Condition
Value
Unit
V
CC
(V)
T
A
= 25 °C
Min.
Typ.
Max.
C
IN
C
OUT
C
PD
Input Capacitance
Output Capacitance
Power Dissipation Capacitance
(note 1)
3.3
3.3
3.3
V
IN
= 0 to V
CC
V
IN
= 0 to V
CC
f
IN
= 10MHz
V
IN
= 0 or V
CC
6
12
45
pF
pF
pF
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