CF8223A 查看數據表（PDF） - Nippon Precision Circuits
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CF8223A Datasheet PDF : 15 Pages
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SM8223A
PIN DESCRIPTION
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Name
TIP
RING
GS
AGND
RDIN
RDRC
RDET
PDW N
GND
OSCOUT
OSCIN
IC
FSK/DTMF
DOUT
DV
VDD
P ad dimensions (µm )
I/O
Function
X
Y
I Tip input. Connected to the telephone line through a protection circuit
1046
2934
I Ring input. Connected to the telephone line through a protection circuit
638
2934
O
Input-stage amplifier gain-select output. Used to adjust the gain of the input-
stage amplifier.
176
2665
O Analog ground output. Internal reference voltage (VD D /2) output level
I
Ring detector input. Used for line reversal and ring signal detection.
Connected for ring detection of attenuated ring signals.
176
1954
176
1534
I/O
Ring detector RC terminal. Connected to an RC network which sets the ring
detector delay time.
176
492
O
Ring detector output. R D R C -input Schmitt-trigger buffer output. LOW -level
output when ring signal is detected.
596
226
Pow er-down control input. LOW -level for normal operation. HIGH-level for
I pow er-down state. In the pow er-down state, pins AG N D, O S C O U T, DOUT, 1063
226
and DV are HIGH.
– Ground. Connected to the system ground potential.
1634
226
O
Crystal oscillator output.The crystal oscillator element is connected between
this pin and OSCIN.
2053
226
I
Crystal oscillator input. The crystal oscillator element is connected between
this pin and OSCOUT.
2634
506
I Test input. Tied LOW for normal operation.
2634
1550
O
FSK/DTMF discriminator output. HIGH-level output when receiving FSK
signal, and LOW -level output when receiving DTMF signal.
2634
1942
O
Demodulator output. Demodulated FSK or DTMF signal output. HIGH-level
output in pow er-down state.
2634
2623
O Data trigger output. Data is output on DOUT when this pin goes LOW .
2211
2934
– Supply
1612
2934
NIPPON PRECISION CIRCUITS—3
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