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LS7215 Datasheet(PDF) 4 Page - LSI Computer Systems

Part # LS7215
Description  PROGRAMMABLE DIGITAL DELAY TIMER
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Manufacturer  LSI [LSI Computer Systems]
Direct Link  http://www.lsicsi.com
Logo LSI - LSI Computer Systems

LS7215 Datasheet(HTML) 4 Page - LSI Computer Systems

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ELECTRICAL CHARACTERISTICS (Voltages referenced to Vss) (Con’t)
Characteristic
SYMBOL VDD
Unit Condition
Min
Max
Min
Max
Min
Max
Switching Characteristics (See Fig. 3)
3.0
-
1.8
-
1.4
-
1.05
MHz
RC Oscillator Frequency
fosc
10.0
-
4.5
-
3.4
-
2.6
MHz -
18.0
-
8.0
-
4.0
-
3.0
MHz
3.0
-
2.6
-
2.0
-
1.52
MHz For prescale
External Clock or
fext
10.0
-
5.3
-
4.0
-
3.0
MHz factor S = 1 or 3000
Crystal Oscillator
18.0
-
5.9
-
4.6
-
3.5
MHz or 3600
Frequency
3.0
-
7.2
-
5.5
-
4.2
MHz S = 32768
fext
10.0
-
16.0
-
12.8
-
9.7
MHz or
18.0
-
15.9
-
12
-
9.1
MHz 32768 x 60
TRIG Set-Up Time
t1
-
38
-
50
-
66
-
ns
-
A, B Set-Up Time
t2
-
0
-
0
-
0
-
ns
-
3.0
-
284
-
375
-
495
ns
Clock to Out Delay
t4
10.0
-
98
-
130
-
172
ns
CL = 50pF
18.0
-
87
-
115
-
152
ns
7215-062309-4
A 1
2
B
TRIG 19
CLOCK/RC/XTLI 4
XTLO (LS7216)
5
6
PSCLS
1M
1M
OSC
MUX
3-STATE
DECODER
CLOCK
LATCH
EDGE
DETECT
MODE
REG
LATCH/TIMER
PRESCALER
500k
8
CONTROL
LOGIC
BUF
9 OUT
500k
500k
500k
WB7-WB0
500k (8)
+V
+V
+V
VDD
VSS
RCS/CLKS (LS7215)
7
RESET
500k
+V
-V
LATCH
8
8
8
LOAD
20
3
8
11-18
ODOUT
10
5


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