SM8224C
Dual-Tone Receiver IC
OVERVIEW
The SM8224C is a receiver and decoder that supports the Bellcore TR-NWT-000030 and SR-TSV-002476
standards calling number identification (caller ID) and call waiting dual-tone signals. It has separate caller ID
signal and call waiting signal inputs, which allows the gain for each input to be adjusted independently. It is
fabricated in CMOS and features a power-down function, realizing low power dissipation operation.
FEATURES
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PINOUT
(Top view)
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TR-NWT-000030 and SR-TSV-002476 standards
(Bellcore)
Call waiting
FSK decoder
High input sensitivity
Independent input gain adjustment for caller ID
signal and call waiting signal inputs
Power-down mode
Crystal oscillator circuit built-in
Single supply operation: 2.7 to 5.5V
Molybdenum-gate CMOS process
Package: 20-pin SSOP, Chip form
AGND
TIP
RING
TRQ
GND
OSCIN
OSCOUT
MODE
TEST
DOUT
1
20
DT1
DT2
DTQ
S0
S1
VDD
CDET
CR
DTDET
APPLICATIONS
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Telephones, fax machines and modems that support
pre- and mid-conversation information services
Adapters for pre- and mid-conversation informa-
tion service functions
Telephone answering machines
Facsimile machines
Computer peripheral equipment
10
11
STR
PACKAGE DIMENSIONS
(Unit: mm)
ORDERING INFORMATION
Device
SM8224CM
CF8224C
Package
1.30
±
0.10
7.40 max
7.20
±
0.05
20-pin SSOP
Chip form
0.20
±
0.05
5.30
±
0.05
7.90
±
0.20
0.62 typ
1.80
±
0.10
2.10 max
0 to 8
0.10
±
0.10
0.68
±
0.12
0.10
0.30
±
0.10
0.65
0.13
M
SEIKO NPC CORPORATION —1
0.6
±
0.15
NPC [ NIPPON PRECISION CIRCUITS INC ]
