NPC SM8222AP, SM8222AS, SM8222BP, SM8222BS Datasheet
SM8222A/B
NIPPON PRECISION CIRCUITS INC.
OVERVIEW
The SM8222A/B is a calling number identification
(caller ID) and call waiting signal (dual tone signal)
receiver decoder IC that conforms with the TRNWT-000030 and SR-TSV-002476 (Bellcore) dialer
FEATURES
■
Conforms to TR-NWT-000030 and SR-TSV002476 (Bellcore) standards
■
Call waiting
■
FSK demodulator
■
Ring signal detect circuit built-in
■
High input sensitivity
■
Input gain adjust circuit built-in
■
Power-down mode
APPLICATIONS
Caller ID Service IC with Call Waiting
telephone number display standards. It is implemented in CMOS and incorporates a power-down
function for low power operation.
■
Crystal oscillator circuit built-in
■
Single supply operation
■
Microcontroller I/O interface
■
Molybdenum-gate CMOS process
■
24-pin SOP and 24-pin DIP packages
■
SM8222A : 2.7 to 3.3V operation
■
SM8222B : 4.5 to 5.5V operation
■
Telephones that display dialer number before and
during conversation
■
Adapters to display dialer number before and dur-
■
Answering machines
■
Facsimile machines
■
Computer peripheral devices
ing conversation
ORDERING INFORMATION PINOUT
De vice Pack age
SM8222AS 24-pin SOP
SM8222AP 24-pin DIP
SM8222BS 24-pin SOP
SM8222BP 24-pin DIP
preliminary
(T op V iew)
OSCOUT
TIP
RING
GS
AGND
CAP
RDIN
RDRC
RDET
MODE
OSCIN
GND
1
12
24
13
VDD
STGT
EST
STD
INT
CDET
DR
DOUT
DCLK
FSKEN
PDWN
IC
NIPPON PRECISION CIRCUITS—1
PACKAGE DIMENSIONS
(Unit: mm)
SM8222A/B
24-pin SOP
+ 0.25
15.24
− 0.20
1.27
0.45 0.10
0.10
0.13
BLOCK DIAGRAM
TIP
RING
GS
7.60 0.30
M
10.20 0.40
0.05min
2.80max
Amplifier
0.50 0.20
0.15
0.05
+
0.02
−
Filter
Filter
(2130Hz)
24-pin DIP
4.96max
3.00min
FSK
Demodulator
Carrier
Detector
Data
Detector
(2130Hz)
30.20
2.54
+ 0.20
− 0.30
+ 0.50
1.50
− 0
Data Timing
MODEFSKEN
Control
Interrupt
Generator
0.45 0.08
13.55 0.25
0.51min
DOUT
DCLK
DR
CDET
INT
15 max
15.24
0.25 0.05
CAP
AGND
Level
Detector
Data
Detector
(2750Hz)
Level
Detector
Guard Time
Control
STD
STGT
EST
Bias
Generator
Oscillator
Filter
Filter
(2750Hz)
preliminary
OSCIN OSCOUT RDIN
RDRC RDET
GNDVDDPDWN
NIPPON PRECISION CIRCUITS—2
SM8222A/B
PIN DESCRIPTION
Number Name I/O Description
1 TIP I Tip input: Connected to the telephone through a protection circuit.
2 RING I Ring input: Connected to the telephone through a protection circuit.
3 GS O Input stage amplifier output: Used to select the input amplifier gain
4 AGND O Analog ground: Internal reference voltage (V
5 CAP I Reference voltage capacitor connection. C = 0.1 µF
6 RDIN I
7 RDRC
8 RDET
9 MODE I
10 OSCIN I Crystal oscillator element input: Oscillator element connection between OSCIN and OSCOUT.
11 OSCOUT O Crystal oscillator element output: Oscillator element connection between OSCIN and OSCOUT.
12 GND – Ground: Connect to system ground.
13 IC I Test input: Tie LOW for normal operation.
14 PDWN I
15 FSKEN I
16 DCLK I/O
17 DOUT O
18 DR
19 CDET
20 INT O Interrupt signal output: Goes LOW when either RDET is LOW, DR is LOW or STD is HIGH.
21 STD O
22 EST O Dual tone detect output: Goes HIGH when the dual tone is detected.
23 STGT I/O
24 VDD – Supply voltage
Ring detect input: Line reversal and ring signal detect input. Connect to detect attenuated ring
signals. Schmitt-trigger input.
Ring detect RC connection: RC network connection to set the ring detect delay time. Open-drain
I/O
output and schmitt-trigger input.
O Ring detect output: RDRC schmitt-trigger buffer output. LOW when a ring signal is detected.
FSK interface mode select: Demodulated FSK signal output method select.
LOW [Mode = 0]: Demodulated data output and data sync clock output.
HIGH [Mode = 1]: Data output in sync with an external clock.
Power-down control: LOW for normal operation. HIGH for device power-down state. When device is
powered-down, AGND, OSCOUT, DCLK, DOUT, INT, CDET are all HIGH. DR also goes HIGH in
mode 0 output. Schmitt-trigger input.
FSK signal output control: Demodulated FSK signal output and carrier detect output control.
Mode 0: DCLK, DOUT, DR, CDET control
Mode 1: DCLK, DOUT, CDET control
FSK signal reception enabled when HIGH.
Signal pins (above) go HIGH when FSKEN is LOW.
FSK interface clock: Demodulated FSK signal output clock.
Mode 0: Clock output in sync with data
Mode 1: Data read clock input
Data output: Demodulated FSK signal output. HIGH-le v el output when PD WN is HIGH or FSKEN is
LOW, or when CDET
Data output trigger: Demodulated FSK data timing output. Active-LOW. Becomes active when 8 bits
O
of data are completed.
O Carrier (FSK signal) detect output: Goes LOW when a valid carrier signal is detected.
Dual tone indicator output: Goes HIGH if the dual tone detect signal is recognized after the external
RC circuit time delay has elapsed.
Dual tone RC time constant circuit connection: External RC network connection for dual tone signal
detection processing. Sets STD output.
is HIGH in receive state.
/2) output.
DD
preliminary
NIPPON PRECISION CIRCUITS—3
−
−
−
+
−
° C
∆
−
−
°
SPECIFICATIONS
Absolute Maximum Ratings
GND = 0 V
Parameter Symbol Condition Rating Unit
Supply voltage range V
Input voltage range V
Input current I
Power dissipation P
Storage temperature range T
DD
IN
IN
D
stg
Recommended Operating Conditions
SM8222A
SM8222B
SM8222A/B
0.5 to 5.0
0.5 to 7.0
0.3 to V
0.3 V
DD
10 mA
44 mW
40 to 125
V
GND = 0 V
Parameter Symbol Condition
Supply voltage range V
Clock frequency f
Clock frequency accuracy
Operating temperature T
DD
CLK
opr
Rating
min typ ma x
SM8222A 2.7 – 3.3
SM8222B 4.5 – 5.5
– 3.579545 – MHz
f
C
0.1 – +0.1 %
20 – 85
Unit
V
C
preliminary
NIPPON PRECISION CIRCUITS—4
DC Electrical Characteristics
SM8222A
■
V
= 3.0 ± 0.3 V, GND = 0 V, f
DD
Parameter Symbol Condition
Current consumption I
Power-down current consumption I
LOW-level input v oltage 1 V
HIGH-level input voltage 1 V
LOW-level input v oltage 2 V
HIGH-level input voltage 2 V
LOW-level input v oltage 3 V
HIGH-level input voltage 3 V
LOW-level output current I
HIGH-level output current I
Input leakage current I
Output leakage current I
CLK
DPD
SM8222A/B
= 3.579545 MHz, T
OSCIN = PWDN = RDIN =
RDRC
DD
IL1
IH1
IL2
IH2
IL3
IH3
OL
OH
IN
OFF
= MODE = 0 V,
FSKEN = V
inputs open
OSCIN = RDIN = RDRC
MODE = 0 V, PWDN =
FSKEN = V
inputs open
PWDN, MODE, FSKEN – – 0.3V
PWDN, MODE, FSKEN 0.7V
RDIN, RDRC
RDIN, RDRC
OSCIN – – TBD V
OSCIN T BD – – V
DOUT, EST, STD, STGT,
DCLK, DR
DOUT, EST, STD, STGT,
DCLK, DR
OSCIN, PWDN, RDIN
RDRC
, INT ––1µA
= − 20 to 85 ° C
a
, all other
DD
, all other
DD
, RDET, CDET
, RDET, CDET
−
−
min typ max
– 2.5 4.5 mA
=
––15µA
DD
– – 0.3V
0.7V
DD
2––mA
––−0.8 mA
1– 1µA
Rating
DD
––V
DD
––V
Unit
V
V
■
SM8222B
V
= 5.0 ± 0.5 V, GND = 0 V, f
DD
Parameter Symbol Condition
Current consumption I
Power-down current consumption I
LOW-level input v oltage 1 V
HIGH-level input voltage 1 V
LOW-level input v oltage 2 V
HIGH-level input voltage 2 V
LOW-level input v oltage 3 V
HIGH-level input voltage 3 V
preliminary
LOW-level output current I
HIGH-level output current I
Input leakage current I
Output leakage current I
= 3.579545 MHz, T
CLK
OSCIN = PWDN = RDIN =
DD
DPD
IL1
IH1
IL2
IH2
IL3
IH3
OL
OH
IN
OFF
RDRC = MODE = 0 V,
FSKEN = V
inputs open
OSCIN = RDIN = RDRC =
MODE = 0 V, PWDN =
FSKEN = V
inputs open
PWDN, MODE, FSKEN – – 0.3V
PWDN, MODE, FSKEN 0.7V
RDIN, RDRC – – 0.3V
RDIN, RDRC 0.7V
OSCIN – – TBD V
OSCIN T BD – – V
DOUT, EST, STD, STGT,
DCLK, DR, RDET , CDET
DOUT, EST, STD, STGT,
DCLK, DR, RDET , CDET
OSCIN, PWDN, RDIN
RDRC, INT ––1µA
= − 20 to 85 ° C
a
, all other
DD
, all other
DD
Rating
min typ m ax
– 4.5 8.0 mA
––15µA
DD
DD
DD
2––mA
–– − 0.8 mA
1– 1µA
––V
DD
––V
Unit
V
V
NIPPON PRECISION CIRCUITS—5
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