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CF8223A PDF даташит

Спецификация CF8223A изготовлена ​​​​«Nippon Precision Circuits Inc» и имеет функцию, называемую «FSK Decoder and DTMF Receiver IC».

Детали детали

Номер произв CF8223A
Описание FSK Decoder and DTMF Receiver IC
Производители Nippon Precision Circuits Inc
логотип Nippon Precision Circuits Inc логотип 

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CF8223A Даташит, Описание, Даташиты
NIPPON PRECISION CIRCUITS INC.
SM8223A
FSK Decoder and DTMF Receiver IC
OVERVIEW
The SM8223A is a FSK (Frequency shift keying) decoder and DTMF (Dual tone multi-frequency) receiver IC.
It is fabricated using a CMOS process and features a power-down function for low power dissipation opera-
tion. The FSK decoder and DTMF receiver have the same performance characteristics as dedicated ICs that
perform the same functions, with the added benefit of an FSK decoder/DTMF receiver auto-select function1
using the telephone tip/ring input signal. It also features a ring (call signal) signal detection circuit, making for
easy construction of low power dissipation, high-performance analog telephone-related applications.
FEATURES
s Both FSK signal caller-ID information services
and DTMF signal caller-ID information services
supported
s FSK decoder/DTMF receiver auto-select function
s Ring (call signal) signal detection circuit built-in
s Serial I/O
s Input gain adjustment circuit built-in
s Power-down mode
s Single supply operation: 3.0V ± 10%
s 3.579545MHz external crystal oscillator fre-
quency
s Molybdenum-gate CMOS process
APPLICATIONS
s Telephones, fax machines and modems that sup-
port caller-ID information services
s Adapters for caller-ID information service func-
tions
s Telephones, fax machines and modems that sup-
port remote operation functions
ORDERING INFORMATION
Device
SM8223A
CF8223A
Package
16-pin DIP
Chip
PINOUT
(Top view)
TIP
RING
GS
AGND
RDIN
RDRC
RDET
PDWN
1
8
PINOUT
(Unit: µm)
RING TIP
GS
AGND
RDIN
16 VDD
DV
DOUT
FSK/DTMF
IC
OSCIN
OSCOUT
9 GND
VDD
DV
(2810, 3160)
DOUT
FSK/DTMF
IC
RDRC
OSCIN
(0, 0)
RDET PDWN
GND OSCOUT
P ad size : 90µm × 90µm
1. Auto-select function operates if the FSK signal conforms to the Bellcore GR-30-CORE standard.
NIPPON PRECISION CIRCUITS—1









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CF8223A Даташит, Описание, Даташиты
PACKAGE DIMENSIONS
(Unit: mm)
SM8223A
19.05
2.54 0.46
1.52
BLOCK DIAGRAM
Differential
Amplifier
TIP
RING
GS
FSK/DTMF
FSK Decoder
Band Pass
Filter
FSK
Decoder
Logic
FSK/DTMF
Discriminator
Logic
AGND
Bias
Circuit
Dial Tone
Filter
High Group
Filter
Low Group
Filter
DTMF Receiver
DTMF
Decoder
Logic
OSC
Ring Detect
DV
DOUT
VDD GND PDWN OSCIN OSCOUT
RDIN
RDRC RDET
NIPPON PRECISION CIRCUITS—2









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CF8223A Даташит, Описание, Даташиты
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
XY
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,
and DV are HIGH.
1063
226
– 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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Номер в каталогеОписаниеПроизводители
CF8223AFSK Decoder and DTMF Receiver ICNippon Precision Circuits Inc
Nippon Precision Circuits Inc

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