lCM7217BlJl Intersil Corporation, lCM7217BlJl Datasheet - Page 16

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

STORE
CLOSED ONCE/REV
RESET
5M
INVERTERS: CD40106B
NANDS: CD4011B
1K
GATE
REEL SWITCH
C
R
R
0.47µF
A
B
7
2
6
DIS
TR
TH
V
V
0.0047µF
DD
SS
8
1
1M
V
DD
OUT
RS
CV
STOP
4
5
3
300µs
50µs
4 DIGIT
RECORDER CONTROL
THUMBWHEEL SWITCHES
LOGIC TO GENERATE
0.047µF
3K
COUNT INPUT
V
V
9999
SIGNALS
DD
DD
10K
FIGURE 20. TAPE RECORDER POSITION INDICATOR
FIGURE 19. INEXPENSIVE FREQUENCY COUNTER
FORWARD
REWIND
GND
N.O.
RESET
GATE
N.O.
SET PT
ZERO
EQ
1s
ICM7217
FIGURE 19A.
FIGURE 19B.
1
CARRY
ZERO
EQUAL
COUNT IN
STORE
UP/DOWN
LOAD REG
LOAD CTR
SCAN
RESET
16
BCD I/O
D1
D2
D3
D4
d
b
g
c
a
e
f
28
14
9
8
V
DD
STORE
RESET
COUNT
ICM7217
V
SS
20
BLANK
NORMAL
INHIBIT LZB
V
DD
24
7 SEGMENTS
4 DIGITS
V
DD
LED DISPLAY
COMMON CATHODE
LED DISPLAY