ICM7217_01 Datasheet, PDF (5/20 Pages) Intersil Corporation – 4-Digit LED Display, Programmable Up/Down Counter

Timing Waveforms
SCAN
INTERNAL OSC
OUTPUT
D4
INTERNAL
D3
(BCD AND
SEGMENT
ENABLE)
D2
D1
10µs TYP
FREE-RUNNING
D4
INTERNAL
(COMMON
D3
ANODE
DIGIT
STROBES)
D2
D1
ICM7217
400µs TYP
FREE-RUNNING
INTERDIGIT BLANK
UP/DOWN
COUNT INPUT
CARRY/BORROW
EQUAL
ZERO
FIGURE 1. MULTIPLEX TIMING
t_UCS
t_UCH
t_CWH
t_CB
t_CEL
t_CZL
t_BW
t_CWL
t_CEH
t_CZH
FIGURE 2. COUNT AND OUTPUTS TIMING
5