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| ICM7224 Datasheet, PDF (3/7 Pages) Intersil Corporation – 41/2 Digit LCD Display Counter | |||
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ICM7224
Absolute Maximum Ratings
Supply Voltage (VDD - VSS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.5V
Input Voltage (Any Terminal) (Note 1) . . . (VDD + 0.3V) to (VSS - 0.3V)
Operating Conditions
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . -25oC to 85oC
Thermal Information
Thermal Resistance (Typical, Note 2)
θJA (oC/W)
PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
50
Maximum Junction Temperature. . . . . . . . . . . . . . . . . . . . . . . 150oC
Maximum Storage Temperature Range . . . . . . . . . . -65oC to 150oC
Maximum Lead Temperature (Soldering, 10s) . . . . . . . . . . . . 300oC
CAUTION: Stresses above those listed in âAbsolute Maximum Ratingsâ may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES:
1. Due to the SCR structure inherent in the CMOS process, connecting any terminal to voltages greater than VDD or less than VSS may
cause destructive device latchup. For this reason, it is recommended that no inputs from sources operating on a different power supply
be applied to the device before its supply is established, and that in multiple supply systems, the supply to the ICM7224 be turned on first.
2. θJA is measured with the component mounted on an evaluation PC board in free air.
Electrical Specifications VDD = 5V, VSS = 0V, TA = 25oC, Unless Otherwise Indicated
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Operating Current, IDD
Test Circuit, Display Blank
-
10
50
µA
Operating Supply Voltage Range
(VDD - VSS), VSUPPLY
3
-
6
V
OSClLLATOR Input Current, IOSCI
Pin 36
-
±2
±10
µA
Segment Rise/Fall Time, tr, tf
CLOAD = 200pF
-
0.5
-
µs
BackPlane Rise/Fall Time, tr, tf
CLOAD = 5000pF
-
1.5
-
µs
Oscillator Frequency, fOSC
Pin 36 Floating
-
19
-
kHz
Backplane Frequency, fBP
Pin 36 Floating
-
150
-
Hz
Input Pullup Currents, IP
Pins 29, 31, 33, 34, VIN = VDD - 3V
-
10
-
µA
Input High Voltage, VIH
Pins 29, 31, 33, 34
3
-
-
V
Input Low Voltage, VIL
Pins 29, 31, 33, 34
-
-
1
V
COUNT Input Threshold, VCT
-
2
-
V
COUNT Input Hysteresis, VCH
-
0.5
-
V
Output High Current, IOH
CARRY Pin 28
-350
-500
-
µA
Leading Zero Blanking OUT Pin 30
VOUT = VDD - 3V
Output Low Current, IOL
CARRY Pin 28
350
500
-
µA
Leading Zero Blanking OUT Pin 30
VOUT = +3V
Count Frequency, fCOUNT
4.5V < VDD < 6V
0
-
15
MHz
STORE, RESET Minimum Pulse Width, tS, tr
3
-
-
µs
Timing Waveforms
OSCILLATOR
FREQUENCY
BACKPLANE
INPUT/OUTPUT
OFF SEGMENTS
128 CYCLES
64 CYCLES
64 CYCLES
ON SEGMENTS
FIGURE 1. ICM7224 DISPLAY WAVEFORMS
3
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