NPC CF8224C Dual-tone receiver ic Datasheet

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
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
(Top view)
AGND
1
20
TIP
DT2
RING
DTQ
TRQ
S0
GND
S1
VDD
OSCIN
CDET
OSCOUT
APPLICATIONS
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Telephones, fax machines and modems that support
pre- and mid-conversation information services
Adapters for pre- and mid-conversation information service functions
Telephone answering machines
Facsimile machines
Computer peripheral equipment
DT1
CR
MODE
TEST
DOUT
DTDET
11
10
STR
PACKAGE DIMENSIONS
(Unit: mm)
ORDERING INFORMATION
0.6 ± 0.15
1.30 ± 0.10
0.62 typ
Chip form
0.20 ± 0.05
7.90 ± 0.20
CF8224C
7.40 max
7.20 ± 0.05
5.30 ± 0.05
20-pin SSOP
2.10 max
SM8224CM
1.80 ± 0.10
Package
0.10 ± 0.10
Device
0 to 8
0.65
0.68 ± 0.12
0.10
0.30 ± 0.10
0.13 M
SEIKO NPC CORPORATION —1
SM8224C
PAD LAYOUT
(Unit: µm)
TIP AGND
2
RING
3
TRQ
1
DT1 DT2
20
(2320,2730)
19
NPC
HB8224C
18
DTQ
4
17
S0
GND
5
16
S1
OSCIN
6
15
VDD
OSCOUT
7
14
CDET
13
CR
MODE
8
9
(0,0)
10
TEST DOUT
11
12
STR DTDET
Chip size: 2.32 × 2.73mm
Chip thickness: 300 ± 30µm
PAD size: 80µm × 80µm
Chip base: VDD level
PAD NAME and DIMENSIONS
Pad dimensions [µm]
Pad number
Pad name
X
Y
1
AGND
731
2574
2
TIP
448
2574
3
RING
205
2330
4
TRQ
205
1947
5
GND
205
1643
6
OSCIN
205
1235
7
OSCOUT
205
789
8
MODE
205
398
9
TEST
451
155
10
DOUT
734
155
11
STR
1585
155
12
DTDET
1817
155
13
CR
2114
451
14
CDET
2114
684
15
VDD
2114
990
16
S1
2114
1644
17
S0
2114
1947
18
DTQ
2114
2330
19
DT2
1896
2574
20
DT1
1613
2574
SEIKO NPC CORPORATION —2
SM8224C
BLOCK DIAGRAM
TIP
Filter
RING
FSK
Demodulator
Output
Circuit
DOUT
TRQ
Carrier
Detector
DT1
CDET
DT2
Filter
(2130Hz)
DTQ
Detector
Circuit
(2130Hz)
Level
Detector
Filter
Time-constant
Circuit
AGND
Filter
(2750Hz)
Bias
Circuit
Detector
Circuit
(2750Hz)
STR
CR
DTDET
Level
Detector
Crystal
Oscillator
Circuit
OSCIN OSCOUT
Power-down
Circuit
MODE S1 S0
VDD GND
SEIKO NPC CORPORATION —3
SM8224C
PIN DESCRIPTION
Number
Name
I/O
Function
1
AGND
O
Reference voltage output. Internal reference voltage (VDD/2) output level
2
TIP
I
Tip input. Connected to the telephone line through a protection circuit
3
RING
I
Ring input. Connected to the telephone line through a protection circuit
4
TRQ
O
Input-stage amplifier gain-select output. Used to adjust the gain of the input-stage amplifier.
5
GND
–
Ground. Connected to the system ground potential.
6
OSCIN
I
Crystal oscillator input. The crystal oscillator element is connected between this pin and OSCOUT.
7
OSCOUT
O
Crystal oscillator output. The crystal oscillator element is connected between this pin and OSCIN.
8
MODE
I
When MODE is HIGH, and S1 and S0 are both LOW, the device is in power-down state. See table 2.
9
TEST
–
TEST pin. Set OPEN when normal using.
10
DOUT
O
Data output. Demodulated FSK signal output. HIGH level output when CDET goes HIGH.
11
STR
O
Dual-tone confirmation output. Function is selected by S0 and S1. See table 2.
Dual-tone confirmation: Active-LOW output when dual tone detection signal passes through RC time
constant delay circuit.
12
DTDET
O
Dual-tone detector output. HIGH-level output when dual tone is detected.
13
CR
I/O
Dual tone RC time constant circuit connection. The dual tone detection signal passes through the RC
network to generate the STR signal.
14
CDET
O
FSK signal carrier detector output. LOW-level when active carrier is detected.
15
VDD
–
Supply
16
S1
I
Function select bit 1. Selects the device mode in combination with S0 and MODE. See table 2.
17
S0
I
Function select bit 1. Selects the device mode in combination with S1 and MODE. See table 2.
18
DTQ
O
Dual-tone signal input-stage amplifier output. Used to adjust the gain of the input-stage amplifier.
19
DT2
I
Dual-tone signal input-stage operational amplifier inverting input
20
DT1
I
Dual-tone signal input-stage operational amplifier non-inverting input
SEIKO NPC CORPORATION —4
SM8224C
SPECIFICATIONS
Absolute Maximum Ratings
GND = 0V
Parameter
Symbol
Condition
Rating
Unit
Supply voltage range
VDD
−0.5 to 7.0
V
Input voltage range
VIN
−0.3 to VDD + 0.3
V
Power dissipation
PD
100
mW
Storage temperature range
Tstg
−55 to 155
°C
Recommended Operating Conditions
GND = 0V
Rating
Parameter
Symbol
Condition
Unit
min
typ
max
Supply voltage
VDD
2.7
–
5.5
V
Clock frequency
fCLK
–
3.579545
–
MHz
Clock frequency accuracy
∆fC
−0.1
–
+0.1
%
Operating temperature
Topr
−20
–
85
°C
Electrical Characteristics
VDD = 2.7 to 5.5V, GND = 0V, fCLK = 3.579545MHz, Ta = −20 to 85°C unless otherwise noted.
Rating
Parameter
Symbol
Condition
Unit
min
typ
max
Supply current consumption
IDD
No analog signal input, no output
load, S1 = 0V, S0 = VDD, MODE = 0V
–
–
8.0
mA
Power-down current
IDPD
No analog signal input, other inputs =
VDD or 0V, no output load, S1 = 0V,
S0 = 0V, MODE = VDD
–
–
15
µA
MODE, S0, S1 LOW-level input
voltage
VIL1
–
–
0.3VDD
V
MODE, S0, S1 HIGH-level input
voltage
VIH1
0.7VDD
–
–
V
OSCIN LOW-level input voltage
VIL2
–
–
0.3VDD
V
OSCIN HIGH-level input voltage
VIH2
0.7VDD
–
–
V
DOUT, STR, DTDET, CR, CDET
LOW-level output current
IOL
2
–
–
mA
DOUT, STR, DTDET, CR, CDET
HIGH-level output current
IOH
–
–
−0.8
mA
TIP, RING, DT1, DT2, MODE, S1, S0
input leakage current
IIN
−1
–
1
µA
SEIKO NPC CORPORATION —5
SM8224C
AC Electrical Characteristics
Measurement conditions: R1 = 430kΩ, R2 = 34kΩ, R3 = 390kΩ, C1= 0.22µF
FSK decoder
VDD = 2.7 to 5.5V, GND = 0V, fCLK = 3.579545MHz, Ta = −20 to 85°C unless otherwise noted.
Rating
Parameter
Symbol
Condition
Unit
min
typ
max
–
−43
CDON
dBm
FSKSNR
20
–
–
dB
Carrier detection sensitivity
CDON
–
−43
−37.78
dBm
Carrier non-detection sensitivity
CDOFF
−50
−46
–
dBm
fCLK
typ − 0.1%
3.579545
typ + 0.1%
MHz
Input sensitivity
S/N ratio1
Oscillator frequency
1. Mark signal and SPACE signal are same level.
Noise: Random noise from 200Hz to 3400Hz.
Dual tone detector
VDD = 2.7 to 5.5V, GND = 0V, fCLK = 3.579545MHz, Ta = −20 to 85°C unless otherwise noted.
Rating
Parameter
Symbol
Condition
Unit
min
typ
max
Frequency (low frequency)
fL
–
2130
–
Hz
Frequency (high frequency)
fH
–
2750
–
Hz
Detection frequency deviation
1.1
–
–
%
Non-detection frequency deviation
3.5
–
–
%
−37.78
–
–
dBm
Non-detection sensitivity
–
–
−43.78
dBm
Signal level deviation
–
–
6
dB
Detection sensitivity
Note: (S0, S1, MODE) = (VDD, 0V, 0V)
Input-stage amplifier Characteristics
VDD = 2.7 to 5.5V, GND = 0V, fCLK = 3.579545MHz, Ta = −20 to 85°C unless otherwise noted.
Rating
Parameter
Symbol
Condition
Unit
min
typ
max
IIN
–
–
1
µA
GOL
30
–
–
dB
Unity gain frequency
fC
80
–
–
kHz
Load capacitance
CL
–
–
100
pF
Load resistance
RL
50
–
–
kΩ
Input leakage current
DC open-loop voltage gain
SEIKO NPC CORPORATION —6
SM8224C
Timing Characteristics
FSK decoder
VDD = 2.7 to 5.5V, GND = 0V, fCLK = 3.579545MHz, Ta = −20 to 85°C unless otherwise noted.
Rating
Parameter
Symbol
Condition
Unit
min
typ
max
Power-down release to start-up time
tDOSC
–
5
–
ms
Carrier detection ON time
tDAQ
2.5
–
10
ms
Final data to carrier detection OFF
time
tDCH
3
–
15
ms
Output timing
VDD = 2.7 to 5.5V, GND = 0V, fCLK = 3.579545MHz, Ta = −20 to 85°C, FSK input data = 1200 ± 12 baud
unless otherwise noted.
Rating
Parameter
Symbol
Condition
Unit
min
typ
max
STR, DOUT rise time
tr0
–
–
200
ns
STR, DOUT fall time
tf0
–
–
200
ns
Input/output delay
tIDD
–
–
5
ms
1188
1200
1212
baud
DOUT data rate
Input to DOUT
SEIKO NPC CORPORATION —7
SM8224C
TIMING DIAGRAMS
FSK demodulator timing
2nd Ring
1st Ring
L1/L2
101010...
1
Data
PDWN
CDET
tDCH
tDAQ
DOUT
101010...1
Data
OSCOUT
tDOSC
PDWN is an internal signal (set by S0, S1, MODE)
Output timing
DOUT
90%
DOUT
10%
tr0
tf0
STR
90%
STR
10%
tf0
tr0
Data timing
STOP START
TIP/RING
b6 b7 1
STOP START
0 b0 b1 b2 b3 b4 b5 b6 b7 1
0 b0 b1 b2 b3 b4 b5 b6
tIDD
START
DOUT
b4 b5 b6 b7
b0 b1 b2 b3 b4 b5 b6 b7
b0 b1 b2 b3 b4
STOP
SEIKO NPC CORPORATION —8
SM8224C
FUNCTIONAL DESCRIPTION
The SM8224C receiver with caller ID service conforms to the Bellcore standards. It incorporates FSK demodulator and dual-tone detection functions in a single chip. It has a dedicated dual-tone signal input so that the
FSK signal input amplification and dual-tone signal input amplification can be set independently. This allows
systems can be easily constructed that provide pre- and mid-conversation information services.
FSK Demodulator
Calling number identification service is sent as an FSK signal, and the SM8224C FSK demodulator processes
this signal. The FSK signal conforms to the following Bellcore standard.
Table 1. FSK signal
Parameter
Description
Modulation type
Continuous-phase binary frequency-shift-keying
Logic “1” data (mark)
1200 ± 12 Hz
Logic “0” data (space)
2200 ± 22 Hz
Signal level (mark)
−32 to −12 dBm
Signal level (space)
−36 to −12 dBm
Data transfer rate
1200 ± 12 baud
Table 2. Function select
S1
S0
MODE
Function
STR
LOW
LOW
HIGH
Power-down
HIGH
LOW (dual tone confirmation)
HIGH
LOW
LOW
Dual-tone detection from DT1/DT21
LOW
HIGH
LOW
FSK and dual-tone detection from
TIP/RING
LOW (dual tone confirmation)
HIGH
HIGH
LOW
FSK detection from TIP/RING
HIGH
LOW
Test mode2
LOW
LOW
1. DT1, DT2, DTQ are active in this mode only.
2. Test mode should not be used.
Note: S1, S0, MODE setting should be used from above combination except Test mode.
Dual Tone Detector
When using mid-conversation information services, 2 mixed signals of 2130Hz and 2750Hz are sent on lines
L1 and L2. The SM8224C detects the 2 signals from the background noise. It uses 2 separate high-order filters
with center frequencies of 2130Hz and 2750Hz to detect the presence of the signal frequencies.
In series with the filters are level detectors. When the input level exceeds the preset rating, the signal is
detected. When the input level is below the rating, the signal is not detected.
If both the 2130Hz and 2750Hz signals are simultaneously detected, DTDET goes HIGH and starts charging
the time constant circuit comprised by an external capacitor and external resistor. When the time constant circuit voltage rises above a fixed voltage level, STR signal goes LOW to indicate dual tone detection.
SEIKO NPC CORPORATION —9
SM8224C
TYPICAL APPLICATION CIRCUIT
Speech
Network
Circuit
R6
1%
C2
5%
C2
5%
R6
1%
R8
1%
R9
1%
VDD
Protection
Circuit
R1
1%
R2
1%
R4
1%
L1
C1
5%
VDD
R5
1%
R3
1%
L2
C1
5%
R1
1%
R2
1%
0.1µF
20%
AGND
DT1
TIP
DT2
RING
DTQ
TRQ
S0
GND
S1
OSCIN
R7
1%
VDD
VDD
OSCOUT CDET
MODE
CR
TEST
DTDET
DOUT
STR
0.1µF
20%
Note : Please set this capacitor
nearby IC pin.
Symbol
Rating1
Unit
R1
330
kΩ
R2
27
kΩ
R3
220
kΩ
C1
0.001
µF
R4
47.5
kΩ
R5
60.4
kΩ
R6
430 + 34
kΩ
R7
390
kΩ
C2
0.22
µF
R8
52.3
kΩ
R9
60.4
kΩ
1. Circuit values are preliminary.
SEIKO NPC CORPORATION —10
SM8224C
Please pay your attention to the following points at time of using the products shown in this document.
The products shown in this document (hereinafter “Products”) are not intended to be used for the apparatus that exerts harmful influence on
human lives due to the defects, failure or malfunction of the Products. Customers are requested to obtain prior written agreement for such
use from SEIKO NPC CORPORATION (hereinafter “NPC”). Customers shall be solely responsible for, and indemnify and hold NPC free and
harmless from, any and all claims, damages, losses, expenses or lawsuits, due to such use without such agreement. NPC reserves the right
to change the specifications of the Products in order to improve the characteristic or reliability thereof. NPC makes no claim or warranty that
the contents described in this document dose not infringe any intellectual property right or other similar right owned by third parties.
Therefore, NPC shall not be responsible for such problems, even if the use is in accordance with the descriptions provided in this document.
Any descriptions including applications, circuits, and the parameters of the Products in this document are for reference to use the Products,
and shall not be guaranteed free from defect, inapplicability to the design for the mass-production products without further testing or
modification. Customers are requested not to export or re-export, directly or indirectly, the Products to any country or any entity not in
compliance with or in violation of the national export administration laws, treaties, orders and regulations. Customers are requested
appropriately take steps to obtain required permissions or approvals from appropriate government agencies.
SEIKO NPC CORPORATION
15-6, Nihombashi-kabutocho, Chuo-ku,
Tokyo 103-0026, Japan
Telephone: +81-3-6667-6601
Facsimile: +81-3-6667-6611
http://www.npc.co.jp/
Email: [email protected]
NC0021CE
2006.04
SEIKO NPC CORPORATION —11
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