參數(shù)資料
型號(hào): CD74HC541SM
廠商: Texas Instruments, Inc.
英文描述: High-Speed CMOS Logic Octal Buffer and Line Drivers, Three-State
中文描述: 高速CMOS邏輯八路緩沖器和線路驅(qū)動(dòng)器,三態(tài)
文件頁(yè)數(shù): 7/16頁(yè)
文件大小: 319K
代理商: CD74HC541SM
7
Three-State Output
Capacitance
C
O
-
-
20
-
20
-
20
-
20
pF
Power Dissipation Capacitance
(Notes 3, 4) (540, 541)
C
PD
C
L
= 15pF
5
-
55
-
-
-
-
-
pF
NOTES:
3. C
PD
is used to determine the dynamic power consumption, per channel.
4. P
D
= V
CC2
f
i
(C
PD
+ C
L
) where f
i
= Input Frequency, C
L
= Output Load Capacitance, V
CC
= Supply Voltage.
Switching Specifications
C
L
= 50pF, Input t
r
, t
f
= 6ns
(Continued)
PARAMETER
SYMBOL
TEST
CONDITIONS
V
CC
(V)
25
o
C
-40
o
C TO
85
o
C
-55
o
C TO
125
o
C
UNITS
MIN
TYP
MAX
MIN
MAX
MIN
MAX
Test Circuits and Waveforms
FIGURE 1. HC TRANSITION TIMES AND PROPAGATION
DELAY TIMES, COMBINATION LOGIC
FIGURE 2. HCT TRANSITION TIMES AND PROPAGATION
DELAY TIMES, COMBINATION LOGIC
FIGURE 3. HC THREE-STATE PROPAGATION DELAY
WAVEFORM
FIGURE 4. HCT THREE-STATE PROPAGATION DELAY
WAVEFORM
t
PHL
t
PLH
t
THL
t
TLH
90%
50%
10%
50%
10%
INVERTING
OUTPUT
INPUT
GND
V
CC
t
r
= 6ns
t
f
= 6ns
90%
t
PHL
t
PLH
t
THL
t
TLH
2.7V
1.3V
0.3V
1.3V
10%
INVERTING
OUTPUT
INPUT
GND
3V
t
r
= 6ns
t
f
= 6ns
90%
50%
10%
90%
GND
V
CC
10%
90%
50%
50%
OUTPUT
DISABLE
OUTPUT LOW
TO OFF
OUTPUT HIGH
TO OFF
OUTPUTS
ENABLED
OUTPUTS
DISABLED
OUTPUTS
ENABLED
6ns
6ns
t
PZH
t
PHZ
t
PZL
t
PLZ
0.3
2.7
GND
3V
10%
90%
1.3V
1.3V
OUTPUT
DISABLE
OUTPUT LOW
TO OFF
OUTPUT HIGH
TO OFF
OUTPUTS
ENABLED
OUTPUTS
DISABLED
OUTPUTS
ENABLED
t
r
6ns
t
PZH
t
PHZ
t
PZL
t
PLZ
6ns
t
f
1.3
CD54/74HC540, CD74HCT540, CD54/74HC541, CD54/74HCT541
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