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54HC245 PDF预览

54HC245

更新时间: 2022-12-14 20:46:48
品牌 Logo 应用领域
摩托罗拉 - MOTOROLA 总线收发器
页数 文件大小 规格书
7页 179K
描述
Octal Bus Transceiver

54HC245 数据手册

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MC74VHC245  
DC ELECTRICAL CHARACTERISTICS  
T
A
= 25°C  
T = – 40 to 85°C  
A
V
CC  
V
Symbol  
Parameter  
Test Conditions  
Min  
Typ  
Max  
Min  
Max  
Unit  
I
Maximum Three–State  
Leakage Current  
V
= V or V  
5.5  
± 0.25  
± 2.5  
µA  
OZ  
in  
IL  
= V  
IH  
or GND  
V
out  
CC  
or GND  
I
Maximum Quiescent  
Supply Current  
V
in  
= V  
5.5  
4.0  
40.0  
µA  
CC  
CC  
AC ELECTRICAL CHARACTERISTICS (Input t = t = 3.0ns)  
r
f
T
A
= 25°C  
T
A
= – 40 to 85°C  
Symbol  
Parameter  
Test Conditions  
Unit  
Min  
Typ  
Max  
Min  
1.0  
Max  
t
t
,
Maximum Propagation Delay,  
A to B or B to A  
V
V
V
= 3.3 ± 0.3V  
= 5.0 ± 0.5V  
= 3.3 ± 0.3V  
C
C
= 15pF  
= 50pF  
5.8  
8.3  
8.4  
11.9  
10.0  
13.5  
ns  
PLH  
CC  
CC  
CC  
L
L
1.0  
PHL  
C
C
= 15pF  
= 50pF  
4.0  
5.5  
5.5  
7.5  
1.0  
1.0  
6.5  
8.5  
L
L
t
t
,
Output Enable Time  
OE to A or B  
C
C
= 15pF  
= 50pF  
8.5  
11.0  
13.2  
16.7  
1.0  
1.0  
15.5  
19.0  
ns  
ns  
PZL  
L
L
R
= 1 kΩ  
PZH  
L
V
R
= 5.0 ± 0.5V  
= 1 kΩ  
C
L
C
L
= 15pF  
= 50pF  
5.8  
7.3  
8.5  
10.6  
1.0  
1.0  
10.0  
12.0  
CC  
L
t
t
,
Output Disable Time  
OE to A or B  
V
R
= 3.3 ± 0.3V  
= 1 kΩ  
C
C
C
C
= 50pF  
= 50pF  
= 50pF  
= 50pF  
11.5  
15.8  
9.7  
1.5  
1.0  
10  
1.0  
18.0  
11.0  
1.5  
PLZ  
CC  
L
L
L
L
PHZ  
L
V
R
= 5.0 ± 0.5V  
= 1 kΩ  
7.0  
1.0  
CC  
L
t
t
,
Output to Output Skew  
V
CC  
= 3.3 ± 0.3V  
(Note 1.)  
pF  
ns  
pF  
pF  
OSLH  
OSHL  
V
= 5.0 ± 0.5V  
CC  
(Note 1.)  
1.0  
C
Maximum Input Capacitance  
DIR, OE  
4
8
10  
in  
C
Maximum Three–State  
I/O Capacitance  
I/O  
Typical @ 25°C, V  
= 5.0V  
CC  
C
Power Dissipation Capacitance (Note 2.)  
pF  
21  
PD  
1. Parameter guaranteed by design. t = |t – t  
|, t  
= |t  
– t |.  
PHLm PHLn  
OSLH  
PLHm PLHn OSHL  
2. C  
is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load.  
PD  
Averageoperatingcurrentcanbeobtainedbytheequation:I  
=C  
V
f
+I  
/8(perbit).C isusedtodeterminetheno–load  
PD  
CC(OPR)  
PD CC in CC  
2
dynamic power consumption; P = C  
V
f
+ I  
in CC  
V
.
D
PD  
CC  
CC  
NOISE CHARACTERISTICS (Input t = t = 3.0ns, C = 50pF, V  
= 5.0V)  
r
f
L
CC  
T
A
= 25°C  
Symbol  
Parameter  
Unit  
V
Typ  
Max  
V
OLP  
Quiet Output Maximum Dynamic V  
0.9  
1.2  
–1.2  
3.5  
OL  
V
OLV  
Quiet Output Minimum Dynamic V  
–0.9  
V
OL  
V
IHD  
Minimum High Level Dynamic Input Voltage  
Maximum Low Level Dynamic Input Voltage  
V
V
ILD  
1.5  
V
3
MOTOROLA  

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