LS7211-S Просмотр технического описания (PDF) - LSI Corporation
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LS7211-S Datasheet PDF : 8 Pages
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ELECTRICAL CHARACTERISTICS (Voltages referenced to Vss) (Con’t)
Characteristic
SYMBOL VDD
Min Max Min Max
Switching Characteristics (See Fig. 3)
4.0
-
1.3
-
1.0
RC Oscillator Frequency
fosc 10.0
-
4.0
-
3.0
18.0
-
6.0
-
4.5
4.0
-
2.3
-
1.8
External Clock or
fext 10.0
-
7.0
-
5.5
Crystal Oscillator
18.0
-
11.0
-
8.5
Frequency
4.0
-
1.2
-
0.93
fext 10.0
-
4.0
-
3.0
18.0
-
7.0
-
5.5
TRIG Set-Up Time
A, B Set-Up Time
WB0 - WB7 Set-Up Time
Clock to Out Delay
t1
-
23
-
30
-
t2
-
0
-
0
-
t3
-
0
-
0
-
4.0 215
-
280
-
t4
10.0
80
-
105
-
18.0 50
-
65
-
Min Max
-
0.76
-
2.3
-
3.4
-
1.3
-
4.0
-
6.5
-
0.7
-
2.3
-
4.2
40
-
0
-
0
-
370
-
140
-
85
-
Unit Condition
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
-
For prescale
factor S = 1 or 3000
or 3600
S = 32768
or
32768 X 60
ns -
ns -
ns -
ns
ns CL = 50pF
ns
A1
B2
+V
500K
+
V
500K
TRIG 18
RESET 7
CLOCK/RC/XTLI 4
500K
MODE
REG
LATCH
EDGE
DETECT
500K
CLOCK
OSC
MUX
XTLO(LS7212) 5
RCS/CLKS(LS7211) 5
500K
PSCLS 6
+V
1M
1M
3-STATE
DECODER
CONTROL
LOGIC
BUF
9 OUT
LATCH/TIMER
8
10-17 WB7-WB0
500K (8)
PRESCALER
+V
-V (Gnd)
3 VDD
8 VSS
FIGURE 2. LS7211/LS7212 BLOCK DIAGRAM
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