ICM7217_01 Datasheet, PDF (6/20 Pages) Intersil Corporation – 4-Digit LED Display, Programmable Up/Down Counter

Timing Waveforms
ICM7217
LOAD COUNTER
(OR LOAD REGISTER)
SCAN
D4
D3
D2
D1
INTERNAL
OPERATING
MODE
INPUT
OUTPUT
BCD I/O
D_N OUT
D4
D3
D2
IN
IN
IN
= HIGH IMPEDANCE
= THREE-STATE W/PULLDOWN
FIGURE 3. BCD I/O AND LOADING TIMING
Typical Performance Curves
300
4.5 ≤ V_DD ≤ 6V
80
T_A = 25^oC
ICM7217
ICM7217B
200
60 ^ICM7217
ICM7217B
COUNT INHIBITED IF
LOAD COUNTER
D1
IN
D4 OUT
D3 OUT
V+ = 5.5V
100
85^oC
25^oC
-20^oC
0
0
1
2
3
V_DD - V_OUT (V)
FIGURE 4. TYPICAL IDIG vs V+
40
V+ = 4.5V
V+ = 5V
20
0
0
1
2
3
V_OUT (V)
FIGURE 5. TYPICAL ISEG vs V_OUT
6