ICM7555CFE 查看數據表（PDF） - Philips Electronics
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ICM7555CFE Datasheet PDF : 9 Pages
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Philips Semiconductors Linear Products
General purpose CMOS timer
Product specification
ICM7555
EQUIVALENT BLOCK DIAGRAM
VDD
8
FLIP–FLOP
RESET
4
THRESHOLD 6
CONTROL 5
VOLTAGE
2
TRIGGER
R
COMPARATOR
A
+
–
R
COMPARATOR
B
+
–
R
1
NOTE:
UNUSED INPUTS SHOULD BE CONNECTED TO APPROPRIATE VOLTAGE FROM TRUTH TABLE.
TRUTH TABLE
THRESHOLD VOLTAGE
TRIGGER VOLTAGE
RESET1
DON’T CARE
DON’T CARE
LOW
>2/3(V+)
> 1/3(V+)
HIGH
VTH < 2/3
DON’T CARE
VTR > 1/3
<1/3(V+)
HIGH
HIGH
NOTES:
1. RESET will dominate all other inputs: TRIGGER will dominate over THRESHOLD.
OUTPUT
DRIVERS
3 OUTPUT
DISCHARGE
7
N
1
OUTPUT
LOW
LOW
STABLE
HIGH
DISCHARGE SWITCH
ON
ON
STABLE
OFF
ABSOLUTE MAXIMUM RATINGS1
SYMBOL
PARAMETER
RATING
UNITS
VDD
VTRIG1
VCV
VTH
VRST
IOUT
PDMAX
Supply voltage
Trigger input voltage
Control voltage
Threshold input voltage
RESET input voltage
Output current
Maximum power dissipation, TA = 25°C (still air)2
N package
+18
V
> -0.3 to
<VDD + 0.3
V
100
mA
1160
mW
D package
780
mW
TSTG
Storage temperature range
-65 to +150
°C
TSOLD
Lead temperature (Soldering 60s)
300
°C
NOTES:
1. Due to the SCR structure inherent in the CMOS process used to fabricate these devices, connecting any terminal to a voltage greater than
VDD + 0.3V or less than GND -0.3V may cause destructive latch-up. For this reason it is recommended that no inputs from external sources
not operating from the same power supply be applied to the device before its power supply is established. In multiple systems, the supply of
the ICM7555 must be turned on first.
2. Derate above 25°C, at the following rates:
N package at 9.3mW/°C
D package at 6.2mW/°C
3. See “Power Dissipation Considerations” section.
August 31, 1994
338
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