ICM7242_07 Datasheet, PDF (7/10 Pages) Intersil Corporation – Long Range Fixed Timer

ICM7242
Typical Performance Curves
260
240
220
T_A = -20°C
200
180
160
T_A = +25°C
140
120
T_A = +75°C
100
80
60
40
RESET MODE
20
0
0
2
4
6
8
10 12 14 16
SUPPLY VOLTAGE (V)
FIGURE 7. SUPPLY CURRENT vs SUPPLY VOLTAGE
100M
10M
1M
100k
10k
RECOMMENDED RANGE OF
TIMING COMPONENT VALUES
1k
100
100pF 0.001
T_A = +25°C
0.01 0.1
1
10 100 1000 10,000
TIMING CAPACITOR, C (µF)
FIGURE 8. RECOMMENDED RANGE OF TIMING
COMPONENT VALUES FOR ACCURATE TIMING
10,000
1,000
100
10
1
0.1
0.01
0.001
100p
10p
1p
0.1
1MΩ
1
10kΩ
V_DD = 5.0V
T_A = +25°C
100kΩ
1kΩ
10MΩ
10 100 1k 10k 100k 1M 10M
TIME BASE FREQUENCY (Hz)
FIGURE 9. TIMEBASE FREE RUNNING FREQUENCY vs R AND C
1500
1400
1300
T_A = +25°C
1200
1100
1000
900
800
700
V_DD = 16V
600
500
V_DD = 5V
400
300
200
100 ^VDD ^{= 2V}
0
0 1 2 3 4 5 6 7 8 9 10
TRIGGER AMPLITUDE (V)
FIGURE 10. MINIMUM TRIGGER PULSE WIDTH vs TRIGGER
AMPLITUDE
1500
1400
1300
T_A = 25°C
1200
1100
1000
900
V_DD = 5V
800
700
600
V_DD = 2V
500
400
300
V_DD = 16V
200
100
0
0 1 2 3 4 5 6 7 8 9 10
RESET AMPLITUDE (V)
FIGURE 11. MINIMUM RESET PULSE WIDTH vs RESET
AMPLITUDE
+10.0
+8.0
+6.0
+4.0
+2.0
0.0
-2.0
-4.0
-6.0
-8.0
-10.0
2
T_A = +25°C
R
C
10kΩ
1MΩ
1kΩ
100kΩ
10kΩ
100kΩ
0.001µF
100pF
0.1µF
0.001µF
0.01µF
0.01µF
4 6 8 10 12 14 16 18 20
SUPPLY VOLTAGE (V)
FIGURE 12. NORMALIZED FREQUENCY STABILITY IN THE
ASTABLE MODE vs SUPPLY VOLTAGE
7
FN2866.4
February 9, 2007