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參數資料
| 型號： | S374 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | OCTAL D-TYPE TRANSPARENT LATCHES AND EDGE-TRIGGERED FLIP-FLOPS |
| 中文描述： | 八路D型透明鎖存器和邊沿觸發(fā)觸發(fā)器 |
| 文件頁數： | 7/28頁 |
| 文件大?。?/td> | 685K |
| 代理商： | S374 |
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SN54LS373, SN54LS374, SN54S373, SN54S374,
SN74LS373, SN74LS374, SN74S373, SN74S374
OCTAL D-TYPE TRANSPARENT LATCHES AND EDGE-TRIGGERED FLIP-FLOPS
SDLS165B
–
OCTOBER 1975
–
REVISED AUGUST 2002
7
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54LS
’
TYP
SN74LS
’
TYP
UNIT
MIN
MAX
MIN
MAX
VIH
VIL
VIK
High-level input voltage
2
2
V
Low-level input voltage
0.7
0.8
V
Input clamp voltage
VCC = MIN,
VCC = MIN,
VIL = VIL max,
II =
–
18 mA
VIH = 2 V,
IOH = MAX
–
1.5
–
1.5
V
VOH
High level output voltage
High-level output voltage
2 4
2.4
3 4
3.4
2 4
2.4
3 1
3.1
V
VOL
Low level output voltage
Low-level output voltage
VCC = MIN,
VIL = VIL max
VIH = 2 V,
IOL = 12 mA
IOL = 24 mA
0.25
0.4
0.25
0.4
V
0.35
0.5
IOZH
Off-state output current,
high-level voltage applied
VCC = MAX,
VO = 2.7 V
VCC = MAX,
VO = 0.4 V
VIH = 2 V,
20
20
A
IOZL
Off-state output current,
low-level voltage applied
VIH = 2 V,
A
–
20
–
20
II
Input current at maximum
input voltage
VCC= MAX
VCC = MAX,
VI= 7 V
VI = 7 V
0 1
0.1
0 1
0.1
mA
IIH
IIL
IOS
High-level input current
VCC = MAX,
VCC = MAX,
VCC = MAX
VCC = MAX,
Output control at 4.5 V
VI = 2.7 V
VI = 0.4 V
20
20
A
Low-level input current
Short-circuit output current
§
–
0.4
–
0.4
mA
–
30
–
130
–
30
–
130
mA
ICC
Supply current
’
LS373
24
40
24
40
mA
’
LS374
27
40
27
40
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
All typical values are at VCC = 5 V, TA = 25
°
C.
§
Not more than one output should be shorted at a time and duration of the short circuit should not exceed one second.
switching characteristics, V
CC
= 5 V, T
A
= 25
°
C (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
TEST CONDITIONS
’
LS373
TYP
’
LS374
TYP
UNIT
(OUTPUT)
MIN
MAX
MIN
MAX
fmax
RL = 667
CL = 45 pF,
See Note 3
35
50
MHz
tPLH
tPHL
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
Data
Any Q
RL = 667
CL
See Note 3
12
18
ns
,
12
18
C or CLK
Any Q
RL = 667
CL
See Note 3
20
30
15
28
ns
,
18
30
19
28
OC
Any Q
RL = 667
CL
See Note 3
15
28
20
26
ns
,
25
36
21
28
15
25
15
28
OC
Any Q
RL = 667
CL = 5 pF
ns
12
20
12
20
NOTE 3: Maximum clock frequency is tested with all outputs loaded.
fmax= maximum clock frequency
tPLH= propagation delay time, low-to-high-level output
tPHL= propagation delay time, high-to-low-level output
tPZH= output enable time to high level
tPZL= output enable time to low level
tPHZ= output disable time from high level
tPLZ= output disable time from low level
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