ICM7226A, ICM7226B
o
Electrical Specifications
V
= 5.0V, T = 25 C, Unless Otherwise Specified (Continued)
DD
A
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Multiplex Inputs: Pins 1, 4, 20, 21
Input Low Voltage, V
IL
-
-
-
0.8
V
V
Input High Voltage, V
2.0
50
-
-
IH
Input Resistance to V , R
V
= +1.0V
IN
100
kΩ
SS IN
Digit Driver: Pins 22-24, 26-30
Low Output Current, I
V
= +1.0V
-
-0.3
180
-
-
mA
mA
OL
High Output Current, I
O
V
= V
-2.0V
-2.0V
-1.0V
150
OH
O
DD
ICM7226B
Segment Driver: Pins 22-24, 26-30
Leakage Current, I
V
= V
= V
-
-
10
-
µA
L
O
SS
DD
High Output Current, I
V
10
15
mA
OH
Multiplex Inputs: Pins 1, 4, 20, 21
Input Low Voltage, V
O
-
-
-
V
-2.0
V
V
IL
DD
Input High Voltage, V
V
-0.8
DD
-
IH
Input Resistance to V , R
V
= V
IN DD
100
360
-
kΩ
SS IN
Digit Driver: Pins 8-11, 13-16
Low Output Current, I
V
= +1.0V
50
-
75
-
-
mA
OL
High Output Current, I
O
V
= V -2.5V
DD
100
µA
OH
O
NOTES:
1. Assumes all leads soldered or welded to PC board and free air flow.
2. Typical values are not tested.
Timing Waveform
40ms
STORE
30ms TO 40ms
60ms
40ms
UPDATE
190ms TO 200ms
FUNCTION:
TIME INTERVAL
RESET
UPDATE
PRIMING
MEASUREMENT INTERVAL
MEASUREMENT
IN PROGRESS
INPUT A
INPUT B
PRIMING EDGES
250ns MIN
MEASURED
INTERVAL
(FIRST)
MEASURED
INTERVAL
(LAST)
NOTE:
1. If range is set to 1 event, first and last measured interval will coincide.
FIGURE 1. WAVEFORMS FOR TIME INTERVAL MEASUREMENT (OTHERS ARE SIMILAR, BUT WITHOUT PRIMING PHASE)
9-19
INTERSIL [ Intersil ]
