LS7210 데이터 시트보기 (PDF) - LSI Corporation
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LS7210 Datasheet PDF : 4 Pages
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MODE DEFINITION TIMING DIAGRAM: (See Figure 3)
DUAL DELAY MODE
Thls is the Default Mode when the inputs A and B are left un-
programmed. The function of the Dual Delay mode is to provide a
time delay on both the turn-on and turn-off of the output. Once turned
on, the output will remain on as long as the trigger input is Logic 0.
Once turned off, the output will remain off as long as the trigger input
is a logic 1.
DELAYED OPERATE MODE
This mode causes a retriggerable delay in turning the output on in re-
sponse to a negative edge at the trigger input. The output is turned
off without delay in response to a positive transition at the trigger in-
put.
DELAYED RELEASE MODE
This mode causes a retriggerable delay in turning off the output
whenever there is a positive transition at the trigger input. The out-
put is turned on without delay in response to a negative transition at
the trigger input.
ONE-SHOT MODE
In this mode, the chip functions like a retriggerable monostable
multi-vibrator. The output is turned on whenever there is a negative
transition at the trigger input. At the end of the programmed delay,
the output is turned off automatically. If there is a negative transition
at the trigger input before the delay is over, the delay is restarted.
A positive transition at the trigger input has no effect on the output
in this mode. NOTE: In One-Shot mode, the TRIGGER input must
be held at logic 1 during a power-up.
ABSOLUTE MAXIMUM RATINGS: (All voltages referenced to VDD)
SYMBOL
VALUE
DC Supply Voltage
VSS
+18
Voltage (Any Pin)
VIN
0 to VSS+.3
Operating Temperature
TA
-25 to +70
Storage Temperature
TSTG
-65 to +150
DC ELECTRICAL CHARACERISTICS:
(-25°C ≤TA ≤+70°C unless otherwise specified. All voltages referenced to VDD)
PARAMETER
Suppy Voltage
Supply Current
SYMBOL
VSS
ISS
MIN
+4.75
-
MAX
+15.0
3.0
Trigger Input
Logic 1
VTH
VSS -1
VSS
Logic 0
VTL
0
.2VSS
All Other Inputs
Logic 1
VIH
.8VSS
VSS
Logic 0
VIL
0
.2VSS
Output
Source Current
for Vo = Vss - 1V
Io
+1.0
-
Io
+2.8
-
Io
+4.2
-
UNIT
V
V
°C
°C
UNIT
V
mA
CONDITION
VSS = +15V, output off
V
-
V
-
V
-
V
-
mA VSS = + 5V
mA VSS = +10V
mA VSS = +15V
SWITCHING CHARACTERISTICS: (See Figure 4)
PARAMETER
Oscillator Frequency
SYMBOL
fOSC
External Clock Frequency
fext
External Clock, Positive Pulse Width
tH
External Clock, Negative Pulse Width
tL
A,B and Trigger Input Set-Up Time
tS
Time-base Clock to Output Delay
(turn-on delay in Delayed Release mode
and turn-off delay in Delayed Operate mode)
tnd
Time-base Clock to Output Delay at the End of Time Out tod
Time-base Clock to Output Delay
tsd
(turn-on delay in One- Shot Mode)
MIN
-
DC
3
3
-
-
-
-
MAX
50
160
-
-
300
1
1.6
600
UNIT
KHz
KHz
µs
µs
ns
µs
µs
ns
7210-020298-2
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