參數(shù)資料
型號(hào): 74LCX245BQX
廠商: FAIRCHILD SEMICONDUCTOR CORP
元件分類: 通用總線功能
英文描述: Low Voltage Bidirectional Transceiver with 5V Tolerant Inputs and Outputs
中文描述: LVC/LCX/Z SERIES, 8-BIT TRANSCEIVER, TRUE OUTPUT, PQCC20
封裝: 2.50 X 4.50 MM, MO-241, DQFN-20
文件頁數(shù): 5/13頁
文件大小: 278K
代理商: 74LCX245BQX
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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