sm8220 Nippon Precision Circuits Inc, (NPC), sm8220 Datasheet - Page 7

• Manufacturer Part Number: sm8220
• Description: Calling Number Identification Receiver Ic
• Manufacturer: Nippon Precision Circuits Inc, (NPC)

TIMING DIAGRAM
TYPICAL APPLICATION CIRCUIT
(Note)
From RING
When the Ring Detect feature of SM8220 is not used, always connect RDIN and RDRC pins to the system ground level.
This will cut excess current drain from VDD under the normal and power down mode of operation.
This diagram example is desingned to adapt to the specifications of United States.
When it is used in other area, the constants may have to chenged appropriately.
From TIP
From RING
From TIP
Protection
Network
(TIP, RING)
OSCOUT*
INPUT
RDRC*
RDET*
PDWN
DOUT
CDET
0.2µF
Protection
Network
0.2µF
0.001µF
0.001µF
1st Ring
0.001µF
0.001µF
470kΩ
33kΩ
91kΩ (240kΩ)
91kΩ (240kΩ)
91kΩ (240kΩ)
91kΩ (240kΩ)
0.2µF
t
DISCONTINUED
SUPD
270kΩ
t
DOSC
0.1µF
SM8220/SM8221
101010... 1
PRODUCT
TIP
RING
PDWN
GND
101010... 1
t
DAQ
SM8221
TIP
RING
AGND
RDIN
RDRC
RDET
PDWN
GND
V
V
IH2
IL2
SM8220
CLKIN
DOUT
CDET
VDD
OSCOUT
Data
/CLKIN
OSCIN
DOUT
DMIN
FOUT
CDET
Data
VDD
NC
3.579545MHz
10µF
+5V
0.1µF
t
DCH
+5V
3.579545
*: Not available for SM8221.
MHz
10µF
NIPPON PRECISION CIRCUITS-7
2nd Ring
( ) = When 3V range
( ) = When 3V range
LCD Display
Controller
LCD Driver
LCD Display
Controller
LCD Driver