SM8220/SM8221
NIPPON PRECISION CIRCUITS INC.
Calling Number Identification Receiver IC
OVERVIEW
The SM8220/SM8221 Calling Number Identification
Receiver IC is a CMOS integrated circuit, which provides
an interface to various calling information delivery services
such as Calling Number Delivery (CND) and Calling
Name Delivery (CNAM) compatible with the Bellcore
GR-30-CORE. The device also contains a power down cir-
cuit, a ring detect circuit and a carrier detect circuit for eas-
ier system implementation.
FEATURES
•Compatible
with Bellcore GR-30-CORE
•Integrated
band pass filter
•FSK
demodulator
Bell 202 and ITU-T V.23
•High
input sensitivity:
−48
dBm typical
•Ring
detect output
•Carrier
Detect Output (SM8220)
•Power
down mode: 1µA power down current
•Uses
3.579545 MHz crystal (SM8220) or external
clock source
•Power
supply voltage: 3V to 5.5V
•Low
power consumption
•Molybdenum-gate
CMOS process
•Package
SM8220: 16 pin SOP, 16 pin DIP
SM8221: 8 pin SOP, 8 pin DIP
APPLICATIONS
•Calling
Number Delivery service
•Adjunct
Boxes
•Telephone
Answering Machines
•Feature
Phones
•Fax
Machines
•Computer
Interface Products
PINOUT
(Top View)
SM8220S (16pin SOP)
SM8220P (16pin DIP)
TIP
RING
AGND
RDIN
RDRC
RDET
PDWN
GND
1
16
VDD
FOUT
DMIN
DOUT
NC
CDET
OSCOUT
OSCIN
/CLKIN
TIP
RING
AGND
RDIN
RDRC
RDET
PDWN
GND
1
16
VDD
FOUT
DMIN
DOUT
NC
CDET
OSCOUT
OSCIN
/CLKIN
SM 8220 S
SM 82 20 P
8
9
8
9
SM8221S (8pin SOP)
SM8221P (8pin DIP)
TIP
RING
PDWN
GND
1
8
VDD
DOUT
CDET
TIP
RING
PDWN
GND
1
8
VDD
DOUT
CDET
SM 82 2 1 P
8221
4
5
CLKIN
4
5
CLKIN
NIPPON PRECISION CIRCUITS-1
SM8220/SM8221
PACKAGE DIMENSIONS
(Unit: mm)
SM8220S (16 pin SOP)
SM8220P (16 pin DIP)
7.49 to 8.13
3.90 0.09
6.00 0.20
9.89 0.09
0 to 8
3.18
3.30
1.375 0.275
0.10
0.175 0.075
1.55 0.20
1.27
0.41 0.05
0.84 0.43
0.25
M
2.54
0.46
1.52
SM8221S (8 pin SOP)
SM8221P (8 pin DIP)
3.81 to 3.99
5.80 to 6.20
7.49 to 8.13
0.38 to 1.02
3.68 to 4.32
0.25
0.13 0.06
19.05
4.80 to 4.98
0.36 to 0.46
0.19 to 0.2
5
1.52
3.30
0 to 8
1.10 to 1.65
1.27
0.10 to 0.25
1.35 to 1.75
0.41 to 1.27
3.18
0.38 to 1.02
2.54
0.46
BLOCK DIAGRAM
FOUT*
DMIN*
TIP
RING
Band Pass
Filter
(SM8221)
FSK
Demodulator
3.68 to 4.32
DOUT
OSCIN*
/CLKIN
OSCOUT*
PDWN
RDIN*
Power Down Control
and Clock Generator
Carrier
Detect
CDET
RDET*
RDRC*
AGND*
VDD
GND
*: Not available for SM8221.
NIPPON PRECISION CIRCUITS-2
0.25
8.89
8.13 to 9.40
6.35
8.13 to 9.40
6.35
SM8220/SM8221
PIN DESCRIPTIONS
Number
SM8220
1
2
3
4
5
6
7
SM8221
1
2
-
-
-
-
3
TIP
RING
AGND
RDIN
RDRC
RDET
PDWN
i
i
o
si
od
o
si
Tip Input:
This pin is connected to the tip side of the twisted pair telephone wires.
This pin must be DC isolated from the phone line.
Ring Input:
This pin is connected to the ring side of the twisted pair telephone wires.
This pin must be DC isolated from the phone line.
Analog Ground:
1/2 V
DD
voltage output. This pin must be grounded through 0.1
µF
capacitor.
Ring Detect Input:
The attenuated ring signal is connected to this pin for the ring detection.
Ring Detect RC Terminal:
An RC network will be connected to this pin to set time delays for
the ring signal detection.
Ring Detect Output:
This pin is an output of a schmitt trigger buffer which input is connected
to RDRC pin. The low level at this pin indicates that the ring signal is detected.
Power Down Control:
This pin must be kept at low level for the normal operation.
When it is high, the device will be in the power down.
Under the power down mode, OSCOUT, CDET and DOUT pins are set to high level and
AGND, FOUT pins are set to high impedance.
8
9
10
11
12
13
14
15
16
4
5
-
6
-
7
-
-
8
GND
OSCIN
/CLKIN
OSCOUT
CDET
NC
DOUT
DMIN
FOUT
VDD
o
o
-
o
i
o
-
-
i
Device Ground:
This pin is connected to the system ground.
Crystal Oscillator Input:
A crystal will be connected between this pin and OSCOUT pin.
This pin may be driven from an external clock source.
Crystal Oscillator Output:
A crystal will be connected between this pin and OSCIN pin.
This pin must be kept open when OSCIN pin is driven from an external clock source.
Carrier Detect Output:
When low, this output indicates that a valid carrier present on the line.
No connection pin.
Data Out:
This pin presents the output of the demodulator while CDET pin is low.
When CDET pin goes high, this pin is held high.
Demodulator Input:
This pin is connected from FOUT pin through a 0.1µF capacitor.
No other components should be connected to this pin.
Band Pass Filter Output:
This pin is connected to DMIN pin through a 0.1µF capacitor.
No other components should be connected to this pin.
Power Supply:
Positive power supply pin.
(Note) si: Schmitt Triger Input, od: Open Drain Output.
Name
i/o
Function
NIPPON PRECISION CIRCUITS-3
SM8220/SM8221
ABSOLUTE MAXIMUM RATINGS
Parameter
Supply Voltage
Input Voltage
Input Current
Power Dissipation
Operating Temperature Range
Storage Temperature Range
Symbol
V
DD
V
IN
I
IN
P
D
Ta
T
STG
T
SLD
Condition
(GND= 0V unless otherwise noted)
Rating
Unit
−0.5
to 7.0
−0.3
to V
DD
+0.3
±10
120
−20
to 85
−40
to 125
255
10
V
V
mA
mW
°C
°C
°C
sec
Soldering Temperature
Soldering Time
t
SLD
ELECTRICAL CHARACTERISTICS
DC CHARACTERISTICS
(VDD= 5±0.5 V, GND = 0 V, f
CLK
= 3.579545 MHz, Ta =
−20
to 85 ˚C unless otherwise noted)
Rating
Parameter
DC Supply Voltage
Supply Current
Power Down Current
Input Low Voltage1
Input High Voltage1
Input Low Voltage2
Input High Voltage2
Output Low Voltage
Output High Voltage
Input Leakage Current
Output Leakage Current
Input DC Resistance
Symbol
V
DD
I
DD
I
DPD
V
IL1
V
IH1
V
IL2
V
IH2
V
OL
V
OH
I
IN
I
OFF
R
IN
*1
*2
OSCIN/CLKIN pin
V
OSCOUT
= 0.8V
DD
OSCIN/CLKIN pin
V
OSCOUT
= 0.2V
DD
PDWN, RDIN, RDRC pin
PDWN, RDIN, RDRC pin
DOUT, RDET, CDET, RDRC
pin, V
DD
= 4.5V, I
OL
= 1.6mA
DOUT, RDET, CDET pin
V
DD
= 4.5V, I
OH
=
−1.6mA
OSCIN/CLKIN, PDWN, RDIN
pin, V
DD
= 5.5V, V
IN
= 0 or 5V
RDRC pin, RDIN= 0V
V
DD
= 5.5V,V
OH
= 5.5V
TIP, RING pin, V
DD
= 5V
Impedance measured from 1/2V
DD
*1: OSCIN/CLKIN= 0V, PDWN= 0V, RDIN= 0V, RDRC= 0V, Other Input Pins= open
*2: OSCIN/CLKIN= 0V, PDWN= V
DD
, RDIN= 0V, RDRC= 0V, Other Input Pins= open
175
250
325
kΩ
1
µA
−1
1
µA
3.7
V
0.75V
DD
2
3
0.4
0.3V
DD
V
V
V
0.7V
DD
V
Condition
MIN
3
TYP
5
1.7
MAX
5.5
3
1
0.3V
DD
Unit
V
mA
µA
V
NIPPON PRECISION CIRCUITS-4
SM8220/SM8221
AC CHARACTERISTICS
(V
DD
= 5.0V, GND= 0V, f
CLK
= 3.579545MHz, Ta=
−20
to 85 ˚C, 0dBm= 0.7746Vrms @ 600Ω unless otherwise noted)
Rating
Parameter
Input Sensitivity
TIP, RING pin
Input Level
Band Pass Filter Frequency Response
(relative to 1700 Hz @
−34
dBm
input level)
Symbol
Condition
TIP, RING pin
V
DD
= 5V
V
DD
= 3V
60Hz
1200 Hz
2200Hz
4000Hz
≥10000Hz
Carrier Detect ON Sensitivity
Carrier Detect OFF Sensitivity
Oscillator Frequency
CD
ON
CD
OFF
f
CLK
CDET pin
CDET pin
−55
−0.1%
−80
−1
0
−43
−54
−48
−51
3.579545
+0.1%
−44
dBm
dBm
MHz
MIN
TYP
−48
−15
−18
dB
MAX
Unit
dBm
dBm
TYPICAL BAND-PASS FILTER FREQUENCY RESPONSE
(Relative to 1700 Hz @
−34
dBm input level)
20
0
-20
-40
-60
-80
-100
0
1000
2000
3000
4000
Gain (dB)
Frequency (Hz)
SWITCHING CHARACTERISTICS
(V
DD
= 5.0V, GND= 0V, f
CLK
= 3.579545MHz, Ta= 25 ˚C, C
L
= 50pF unless otherwise noted)
Rating
Parameter
Power Down Low to
Oscillator Start Up
Power Down Low to
FSK Data Detect
Carrier Detect Acquisition Time
End of Data to Carrier Detect High
Symbol
Condition
MIN
TYP
5
10
10
10
MAX
Unit
ms
ms
ms
ms
t
DOSC
t
SUPD
t
DAQ
t
DCH
NIPPON PRECISION CIRCUITS-5
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