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| ICM7224 Datasheet, PDF (4/7 Pages) Intersil Corporation – 41/2 Digit LCD Display Counter | |||
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ICM7224
Typical Performance Curves
30
LCD DEVICES, TEST CIRCUIT
DISPLAY BLANK
25 PIN 36 OPEN
20
TA = -20oC
15
TA = 25oC
10
5
TA = 70oC
0
1
2
3
4
5
6
7
SUPPLY VOLTAGE (V)
FIGURE 2. OPERATING SUPPLY CURRENT AS A FUNCTION
OF SUPPLY VOLTAGE
1000
100
LCD DEVICES
TA = 25oC
VSUPPLY = 5V
VSUPPLY = 6V
10
VSUPPLY = 4V
VSUPPLY = 3V
1
1
10
100
1000
COSC (pF)
FIGURE 3. BACKPLANE FREQUENCY AS A FUNCTION OF
OSCILLATOR CAPACITOR COSC
45
SINE WAVE INPUT
40 SWINGING FULL SUPPLY
35
30
25
TA = -20oC
TA = 25oC
TA = 70oC
20
15
4
5
6
SUPPLY VOLTAGE (V)
FIGURE 4. MAXIMUM COUNT FREQUENCY (TYPICAL) AS A
FUNCTION OF SUPPLY VOLTAGE
10
V+ = 5V
TA = 25oC
1
0.1
0.01
1kHz
10kHz
100kHz 1MHz
ÆCOUNT
10MHz 100MHz
FIGURE 5. SUPPLY CURRENT AS A FUNCTION OF COUNT
FREQUENCY
TERMINAL
29
31
33
34
TABLE 1. CONTROL INPUT DEFINITIONS
INPUT
VOLTAGE
Leading Zero Blanking
INput
COUNT INHIBIT
RESET
STORE
VDD or Floating
VSS
VDD or Floating
VSS
VDD or Floating
VSS
VDD or Floating
VSS
FUNCTION
Leading Zero Blanking Enabled
Leading Zeroes Displayed
Counter Enabled
Counter Disabled
Inactive
Counter Reset to 0000
Output Latches not Updated
Output Latches Updated
4
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