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54F646BSPCX Datasheet(数据表) 7 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部件型号  54F646BSPCX
说明  Octal Transceiver/Register with TRI-STATE Outputs
下载  12 Pages
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 

 7 page
background image
’F646’F648
AC Electrical Characteristics
74F
54F
74F
TA ea25 C
TA VCC e Mil
TA VCC e Com
Symbol
Parameter
VCC ea50V
CL e 50 pF
CL e 50 pF
Units
CL e 50 pF
Min
Max
Min
Max
Min
Max
fmax
Maximum Clock Frequency
90
75
90
MHz
tPLH
Propagation Delay
20
70
20
85
20
80
ns
tPHL
Clock to Bus
20
80
20
95
20
90
tPLH
Propagation Delay
10
70
10
80
10
75
ns
tPHL
Bus to Bus (’F646)
10
65
10
80
10
70
tPLH
Propagation Delay
20
85
10
100
20
90
ns
tPHL
Bus to Bus (’F648)
10
75
10
90
10
80
tPLH
Propagation Delay
20
85
20
110
20
95
ns
tPHL
SBA or SAB to A or B
20
80
20
100
20
90
tPZH
Enable Time
20
85
20
100
20
90
ns
tPZL
OE to A or B
20
120
20
135
20
125
tPHZ
Disable Time
10
75
10
90
10
85
ns
tPLZ
OE to A or B
20
90
20
110
20
95
tPZH
Enable Time
20
140
20
160
20
150
ns
tPZL
DIR to A or B
20
130
20
150
20
140
tPHZ
Disable Time
10
90
10
100
10
95
ns
tPLZ
DIR to A or B
20
110
20
120
20
115
’F646’F648
AC Operating Requirements
74F
54F
74F
Symbol
Parameter
TA ea25 C
TA VCC e Mil
TA VCC e Com
Units
VCC ea50V
Min
Max
Min
Max
Min
Max
ts(H)
Setup Time HIGH or LOW
50
50
50
ns
ts(L)
Bus to Clock
50
50
50
th(H)
Hold Time HIGH or LOW
20
25
20
ns
th(L)
Bus to Clock
20
25
20
tw(H)
Clock Pulse Width
50
50
50
ns
tw(L)
HIGH or LOW
50
50
50
7




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