Holtek HT9032B Calling line identification receiver Datasheet

HT9032
Calling Line Identification Receiver
Features
·
·
·
·
HT9032B/C/D operating voltage: 3.5V~5.5V
HT9032F operating voltage: 3.0V~5.5V
Bell 202 FSK and V.23 demodulation
Ring detection input and output
Carrier detection output
·
·
·
Power down mode
High input sensitivity
HT9032C: 16-pin DIP/SOP package
HT9032B/F-A: 8-pin DIP package
HT9032D/F-B: 8-pin SOP package
·
·
Computer telephony interface products
ADSI products
Applications
·
·
·
Feature phones
Caller ID adjunct boxes
Fax and answering machines
General Description
receive and display the calling number, or message waiting indicator sent to subscribers from
the central office facilities. The device also provides a carrier detection circuit and a ring detection circuit for easier system applications.
The HT9032 calling line identification receiver
is a low power CMOS integrated circuit designed for receiving physical layer signals transmitted according to Bellcore TR-NWT-000030
and ITU-T V.23 specifications. The primary application of this device is for products used to
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April 6, 2000
HT9032
Block Diagram
T IP
B a n d P a s s
F ilte r
R IN G
D e m o d u la to r
D O U T C
V a lid D a ta
D e te c tio n
P D W N
D O U T
C D E T
P o w e r U p
L o g ic
R T IM E
In te rn a l
P o w e r U p
L o g ic
R D E T 1
R D E T
R in g
A n a ly s is
C ir c u it
R D E T 2
V D D
R e fe re n c e
V o lta g e
V S S
X 1
C lo c k
G e n e ra to r
X 2
Pin Assignment
T IP
R IN G
1
1 6
2
1 5
V D D
D O U T C
R D E T 1
3
1 4
D O U T
R D E T 2
4
1 3
N C
5
1 2
C D E T
R D E T
6
1 1
7
1 0
8
T IP
1
8
R IN G
P D W N
2
7
V D D
D O U T
3
6
X 1
R T IM E
P D W N
V S S
4
5
X 2
V S S
H T 9 0 3 2 B
8 D IP
9
D O U T
1
8
X 1
N C
X 1
V D D
T IP
2
7
X 2
3
6
V S S
X 2
R IN G
4
5
P D W N
H T 9 0 3 2 C
1 6 D IP /S O P
T IP
1
8
R IN G
P D W N
2
7
V D D
D O U T
3
6
C D E T
V S S
4
5
X 1
H T 9 0 3 2 F -A
8 D IP
H T 9 0 3 2 D
8 S O P
D O U T
1
8
V D D
T IP
2
7
C D E T
X 1
3
6
V S S
R IN G
4
5
P D W N
H T 9 0 3 2 F -B
8 S O P
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April 6, 2000
HT9032
Pin Description
Pin Name I/O
Description
Power Inputs
VDD
¾
Power-VDD is the input power for the internal logic.
VSS
¾
Ground-VSS is ground connection for the internal logic.
PDWN
I
A logic ²1² on this pin puts the chip in power down mode. When a logic ²0² is on
this pin, the chip is activated. This is a schmitt trigger input.
Clock
X1
I
X2
O
A crystal or ceramic resonator should be connected to this pin and X2.
This pin may be driven from an external clock source.
A crystal or ceramic resonator should be connected to this pin and X1.
Ring Detections
RDET1
I
It detects ring energy on the line through an attenuating network and enables
the oscillator and ring detection. This is a schmitt trigger input.
RDET2
I
It couples the ring signal to the precision ring detector through an attenuating
network. RDET=²0² if a valid ring signal is detected. This is a schmitt trigger input.
RTIME
An RC network may be connected to this pin in order to hold the pin voltage below 2.2V between the peaks of the ringing signal. This pin controls internal
I/O power up and activates the partial circuitry needed to determine whether the
incoming ring is valid or not. The input is a schmitt trigger input. The output
cell structure is an NMOS output.
FSK Signal Inputs
TIP
I
This input pin is connected to the tip side of the twisted pair wires. It is internally biased to 1/2 VDD when the device is in power up mode. This pin must be
DC isolated from the line.
RING
I
This input pin is connected to the ring side of the twisted pair wires. It is internally biased to 1/2 VDD when the device is in power up mode. This pin must be
DC isolated from the line.
Detection Results
RDET
O
This open drain output goes low when a valid ringing signal is detected. When
connected to PDWN pin, this pin can be used for auto power up.
CDET
O
This open drain output goes low indicating that a valid carrier is present on the
line. A hysteresis is built-in to allow for a momentary drop out of the carrier.
When connected to PDWN pin, this pin can be used for auto power up.
DOUT
O
This pin presents the output of the demodulator whenever CDET pin is low.
This data stream includes the alternate ²1² and ²0² pattern, the marking, and
the data. At all other times, this pin is held high.
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April 6, 2000
HT9032
Pin Name I/O
DOUTC
O
Description
This output presents the output of the demodulator whenever CDET pin is low
and when an internal validation sequence has been successfully passed. This
data stream does not include the alternate ²1² and ²0² pattern. This pin is always held high.
Absolute Maximum Ratings
Voltages are referenced to VSS, except where noted.
Supply Voltage..............................-0.5V to 6.0V
All Input Voltages ....................................25mW
Operating Temperature Range .......0°C to 70°C
Storage Temperature Range .....-40°C to 150°C
Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maximum Ratings² may cause substantial damage to the device. Functional operation of this device
at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability.
D.C. Characteristics
Symbol
VDD
IDD1
Parameter
Supply Voltage
Supply Current
Crystal=3.58MHz, Ta=0~70°C
Test Conditions
Min.
Typ.
9032B/C/D
3.5
5
5.5
V
9032F
3.0
5
5.5
V
5V
PDWN=0 (3.58MHz OSC on)
¾
3.2
5
mA
¾
1.9
2.5
mA
VDD
¾
Conditions
Max. Unit
IDD2
Supply Current
5V
PDWN=1 and RTIME=0
(3.58MHz OSC on and
internal circuits
partially on)
ISTBY
Standby Current
5V
PDWN=1 and RTIME=1
(3.58MHz OSC off)
¾
¾
1
mA
VIL
Input Voltage Logic 0
5V
¾
¾
¾
0.2V
VDD
VIH
Input Voltage Logic 1
5V
¾
0.8V
¾
¾
VDD
IOL
Output Voltage Logic 0
5V
IOL=1.6mA
¾
0.1V
VDD
IOH
Output Voltage Logic 1
5V
IOH=0.8mA
0.9V
¾
¾
VDD
IIN
Input Leakage Current,
All Inputs
5V
¾
-1
¾
1
mA
VT-
Input Low Threshold
Voltage
5V
RDET1, RTIME, PDWN
2.0
2.3
2.6
V
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April 6, 2000
HT9032
Symbol
Test Conditions
Parameter
Min.
Typ.
RDET1, RTIME, PDWN
2.5
2.75
3.0
V
5V
RDET2
1.0
1.1
1.2
V
5V
TIP, RING
¾
500
¾
kW
VDD
Conditions
5V
VTRDET2 Input Threshold Voltage
RIN
VT+
Input High Threshold
Voltage
Input DC Resistance
T IP
R IN G
V D D
D O U T C
R D E T 1
D O U T
C D E T
R D E T
R D E T 2
R T IM E
P D W N
V S S
~
Max. Unit
0 .1 m F
X 1
X 2
H T 9 0 3 2 C
3 .5 8 M H z
1 0 M W
3 0 p F
S u p p ly c u r r e n t te s tin g : A ll, e x c e p t P D W N a n d R T IM E ,
u n w ir e d p in s a r e le ft flo a tin g .
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April 6, 2000
HT9032
A.C. Characteristics - FSK Detection
VSS=0V, Crystal=3.58MHz, Ta=0 to 70°C, 0dBm=0.7746Vrms @ 600W
Symbol
Test Conditions
Parameter
VDD
Conditions
Min.
Typ.
Max.
Unit
Input Sensitivity: TIP,
RING
5V
-40
-45
¾
dBm
Signal to Noise Ratio
5V
¾
20
¾
dB
Band Pass Filter
60Hz
550Hz
2700Hz
3300Hz
5V
¾
dB
Carrier Detect Sensitivity
5V
tDOSC
Oscillator Start Up Time
5V
tSUPD
Power Up to FSK Signal
Set Up Time
tDAQ
tDCH
S/N
Frequency Response
Relative to 1700Hz @
0dBm
-64
-4
-3
-34
¾
¾
-48
¾
dBm
¾
¾
2
¾
ms
5V
¾
15
¾
¾
ms
Carrier Detect
Acquisition Time
5V
¾
¾
14
¾
ms
End of Data to Carrier
Detect High
5V
¾
8
¾
¾
ms
2 S e c
0 .5 S e c
0 .5 S e c
1
0 1 0 1 0 1 ..
R in g S ig n a l
tD
D A T A
O S C
R T IM E
R D E T
P D W N
C D E T
tS
U P D
tD
tD
A Q
D O U T
R a w D A T A
D O U T C
X 1
C H
C o o k e d D A T A
3 .5 8 M H z
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April 6, 2000
HT9032
Functional Description
· Logical 0 (Space)=2100Hz
· Transmission rate=1200bps
The HT9032 is designed to be the physical layer
demodulator for products targeted for the caller
ID market. The data signaling interface should
conform to Bell 202, which is described as follows:
Since the band pass filter of the HT9032 can
pass the V.23 signal, hence the HT9032 also can
demodulate the V.23 signal.
· Analog, phase coherent, frequency shift keying
· Logical 1 (Mark)=1200+/-12Hz
Ring detection
· Logical 0 (Space)=2200+/-22Hz
· Transmission rate=1200bps
The data will be transmitted in the silent period between the first and second power ring before a voice path is established. The HT9032
should first detect a valid ring and then perform the FSK demodulation. The typical ring
detection circuit of the HT9032 is depicted below. The power ring signal is first rectified
through a bridge circuit and then sent to a resistor network that attenuates the incoming
power ring. The values of resistors and capacitor given in the figure have been chosen to provide a sufficient voltage at RDET1 pin to turn
on the Schmitt Trigger input with approximately a 40 Vrms or greater power ring input
from tip and ring. When VT+ of the Schmitt is
exceeded, the NMOS on the pin RTIME will be
driven to saturation discharging capacitor on
RTIME. This will initialize a partial power up,
with only the portions of the part involved with
the ring signal analysis enabled, including
RDET2 pin. With RDET2 pin enabled, a portion
of the power ring above 1.2V is fed to the ring
analysis circuit. Once the ring signal is qualified, the RDET pin will be sent low.
· Data application=serial, binary,
asynchronous
The interface should be arranged to allow simple data transmission from the terminating
central office, to the CPE (Customer Premises
Equipment), only when the CPE is in an
on-hook state. The data will be transmitted in
the silent period between the first and second
power ring before a voice path is established.
The transmission level from the terminating
C.O. will be -13.5dBm+/-1.0. The worst case attenuation through the loop is expected to be
-20dB. The receiver therefore, should have a
sensitivity of approximately -34.5dBm to handle the worst case installations. The ITU-T V.23
is also using the FSK signaling scheme to
transmit data in the general switched telephone network. For mode 2 of the V.23, the
modulation rate and characteristic frequencies
are listed below:
· Analog, phase coherent, frequency shift keying
· Logical 1 (Mark)=1300Hz
P D W N
V
2 7 0 k W
R T IM E
D D
P o w e r U p
L o g ic
0 .2 m F
T o
B r id g e
4 7 0 k W
In te rn a l
P o w e r U p
L o g ic
R D E T 1
1 8 k W
R D E T 2
R in g
A n a ly s is
C ir c u it
1 5 k W
R D E T
1 .2 V
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April 6, 2000
HT9032
Operation mode
There are three operation modes of the HT9032. They are power down mode, partial power up mode,
and power up mode. The three modes are classified by the following conditions:
Modes
Current
Consumption
Conditions
Power down
PDWN=²1² and RTIME=²1²
<1mA
Partial power up
PDWN=²1² and RTIME=²0²
1.9mA typically
Power up
PDWN=²0²
3.2mA typically
1.9mA typically. Once the PDWN pin is below
VT-, the part will be fully powered up, and ready
to receive FSK. During this mode, the device
current will increase to approximately 3.2mA
(typ). The state of the RTIME pin is now a
²don¢t care² as far as the part is concerned. After the FSK message has been received, the
PDWN pin can be allowed to return to VDD and
the part will return to the power down mode.
Normally, the PDWN pin and the RTIME pin
control the operation mode of the HT9032.
When both pins are HIGH, the HT9032 is set at
the power down mode, consuming less than 1mA
of supply current. When a valid power ring arrives, the RTIME pin will be driven below VTand the portions of the part involved in the ring
signal analysis are enabled. This is partial
power up mode, consuming approximately
Application Circuits
Application circuit 1
T IP
V
0 .2 m F
~
0 .0 1 m F
D D
H T 1 0 5 0
2 0 0 k W
9 V
~
0 .1 m F
4 7 0 k W
0 .2 m F
R IN G
0 .0 1 m F
2 0 0 k W
T IP
R IN G
D O U T
1 8 k W
1 5 k W
V D D
P D W N
V S S
H T 9 0 3 2 B /D
8
m C
X 1
3 .5 8 M H z
X 2
1 0 M W
3 0 p F
3 0 p F
April 6, 2000
HT9032
Application circuit 2
T IP
V
0 .2 m F
~
0 .0 1 m F
D D
H T 1 0 5 0
2 0 0 k W
9 V
~
0 .1 m F
4 7 0 k W
0 .2 m F
2 0 k W
R IN G
0 .0 1 m F
2 0 0 k W
D O U T
C D E T
R D E T
R D E T 1
1 8 k W
R D E T 2
V
1 5 k W
D D
R T IM E
P D W N
V S S
2 7 0 k W
m C
X 1
3 .5 8 M H z
X 2
1 0 M W
H T 9 0 3 2 C
0 .2 m F
2 0 k W
V D D
D O U T C
T IP
R IN G
3 0 p F
3 0 p F
Application circuit 3
T IP
V
0 .2 m F
~
0 .0 1 m F
D D
H T 1 0 5 0
2 0 0 k W
9 V
~
0 .1 m F
4 7 0 k W
0 .2 m F
R IN G
0 .0 1 m F
2 0 0 k W
T IP
R IN G
V D D
2 0 k W
D O U T
1 8 k W
m C
C D E T
1 5 k W
P D W N
V S S
H T 9 0 3 2 F
9
3 .5 8 M H z
X 1
1 0 M W
3 0 p F
3 0 p F
April 6, 2000
HT9032
Holtek Semiconductor Inc. (Headquarters)
No.3 Creation Rd. II, Science-based Industrial Park, Hsinchu, Taiwan, R.O.C.
Tel: 886-3-563-1999
Fax: 886-3-563-1189
Holtek Semiconductor Inc. (Taipei Office)
5F, No.576, Sec.7 Chung Hsiao E. Rd., Taipei, Taiwan, R.O.C.
Tel: 886-2-2782-9635
Fax: 886-2-2782-9636
Fax: 886-2-2782-7128 (International sales hotline)
Holtek Semiconductor (Hong Kong) Ltd.
RM.711, Tower 2, Cheung Sha Wan Plaza, 833 Cheung Sha Wan Rd., Kowloon, Hong Kong
Tel: 852-2-745-8288
Fax: 852-2-742-8657
Copyright ã 2000 by HOLTEK SEMICONDUCTOR INC.
The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek
assumes no responsibility arising from the use of the specifications described. The applications mentioned herein are
used solely for the purpose of illustration and Holtek makes no warranty or representation that such applications
will be suitable without further modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. Holtek reserves the right to alter its products without prior
notification. For the most up-to-date information, please visit our web site at http://www.holtek.com.tw.
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April 6, 2000
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