CD22859 查看數據表（PDF） - Intersil
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CD22859 Datasheet PDF : 5 Pages
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Functional Diagram
C1 3
C2 4
C3 5
C4 9
CD 15
VDD
R1 14
R2 13
R3 12
R4 11
OSC 1 7
OSC 2 8
CD22859
VDD
COUNT CONT.
COL. DIVIDER
C1-46 C3-38
C2-42 C4-34
COL
SENSE
COL INH
÷ 32
D
A
ROW
SENSE
ROW DIVIDER
R1-80 R3-66
R2-73 R4-59
COUNT
CONT.
÷ 32
D
A
ROW INH
ENABLE
OP AMP
OSC
÷2
MUTE
CONTROL
VDD
1
16
VOUT
RX
10
TX
2
VSS
6
d
a
D1
L1
G
1K
D2
1.65K
2.55K
I
51K
g
TX
RX
f
F RR
B GN
GN
IT
VDD
+
RX
TX
/CD
1
OSC1
A
K
a
b
L2
c
C2 R1
C1
V1
L4
R2
V2
C3
L1
L2
D3
NETWORK
8
OSC2
VOUT
RL
R4
R3
VSS
C
D4
FIGURE 2. INTERFACE WITH STANDARD K500 TELEPHONE NETWORK
KEYPAD
123
456
789
*0#
4-130
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