lCM7217BlJl Intersil Corporation, lCM7217BlJl Datasheet - Page 17

• Manufacturer Part Number: lCM7217BlJl
• Description: 4-digit Led Display, Programmable Up/down Counter
• Manufacturer: Intersil Corporation

THUMBWHEEL SWITCHES
30pF
30pF
COUNTDOWN
LOAD SET PT.
DISPLAY OFF
4.1943MHz
CRYSTAL
R
ELAPSED
S
< 75Ω
1
2
3
4
5
6
7
ICM7213
V
V
V
DD
DD
DD
PRESET
RESET
5959
14
13
12
10
11
9
8
SW4
SW5
RUN MIN/SEC
STOP
RUN HRS/MIN
V
(4V MAX)
DD
SW2
SW3
10K
SW1
4
FIGURE 21. PRECISION TIMER
4
V
100K
DD
ICM7217
LOAD REG
CARRY
ZERO
EQUAL
COUNT IN
STORE
LOAD CTR
SCAN
RESET
UP/DOWN
BCD
I/O
17
ICM7217
EQUAL
ZERO
DIS. CONT.
V
V
D1
D2
D3
D4
DD
SS
TO LOGIC GENERATING
SIGNALS FOR CONTROL OF
EXTERNAL EQUIPMENT
g
b
d
e
a
c
f
V
DD
BLANK
SW6
INHIBIT
LZB
4
V
DD
COMMON ANODE
LED DISPLAY
7
SEGMENTS
DIGITS