Datasheet

8-172
Functional Diagram
Discharge Leakage I
DIS
V
DD
= 15V - - 10 - - 50 nA
Output Voltage V
OL
V
DD
= 15V, I
SINK
= 20mA - 0.4 1.0 - - 1.25 V
V
DD
= 5V, I
SINK
= 3.2mA - 0.2 0.4 - - 0.5 V
V
OH
V
DD
= 15V, I
SOURCE
= 0.8mA 14.3 14.6 - 14.2 - - V
V
DD
= 5V, I
SOURCE
= 0.8mA 4.0 4.3 - 3.8 - - V
Discharge Output Voltage V
DIS
V
DD
= 5V, I
SINK
= 15mA - 0.2 0.4 - - 0.6 V
V
DD
= 15V, I
SINK
= 15mA -----0.4V
Supply Voltage (Note 3) V
DD
Functional Operation 2.0 - 18.0 3.0 - 16.0 V
Output Rise Time (Note 3) t
R
R
L
= 10M, C
L
= 10pF, V
DD
= 5V -75---- ns
Output Fall Time (Note 3) t
F
R
L
= 10M, C
L
= 10pF, V
DD
= 5V -75---- ns
Oscillator Frequency
(Note 3)
f
MAX
V
DD
= 5V, R
A
= 470Ω, R
B
= 270Ω,
C = 200pF
-1----MHz
NOTES:
3. These parameters are based upon characterization data and are not tested.
4. Applies only to military temperature range product (M suffix).
TRUTH TABLE
THRESHOLD VOLTAGE TRIGGER VOLTAGE RESET OUTPUT DISCHARGE SWITCH
Don’t Care Don’t Care Low Low On
>
2
/
3
(V+) >
1
/
3
(V+) High Low On
<
2
/
3
(V+) >
1
/
3
(V+) High Stable Stable
Don’t Care <
1
/
3
(V+) High High Off
NOTE: RESET will dominate all other inputs: TRIGGER will dominate over THRESHOLD.
Electrical Specifications Applies to ICM7555 and ICM7556, Unless Otherwise Specified
PARAMETER SYMBOL TEST CONDITIONS
T
A
= 25
o
C
(NOTE 4)
-55
o
C TO 125
o
C
UNITSMIN TYP MAX MIN TYP MAX
+
-
THRESHOLD
CONTROL
VOLTAGE
6
5
3
1
+
-
TRIGGER
2
COMPARATOR
R
GND
B
COMPARATOR
A
R
V
DD
8
OUTPUT
7
1
n
DISCHARGE
OUTPUT
DRIVERS
FLIP-FLOP
RESET
4
R
NOTE: This functional diagram reduces the circuitry down to its simplest equivalent components. Tie down unused inputs. R = 100kΩ, ±20% (Typ)
ICM7555, ICM7556