FX631 Consumer Microcircuits Limited, FX631 Datasheet

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FX631

Manufacturer Part Number
FX631
Description
Low-voltage Spm Detector
Manufacturer
Consumer Microcircuits Limited
Datasheet

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Features
Features
Features
Brief Description
Brief Description
Brief Description
Features
Features
Brief Description
Brief Description
Subscriber Pulse Metering (SPM) detector to indicate
the presence, on a telephone line, of both 12kHz and
16kHz telephone call-charge frequencies.
input amplitude/sensitivities are component adjustable to
the user's national ‘Must/Must-Not Decode’
specifications via an on-chip input amplifier, whilst the
12kHz and 16kHz frequency limits are accurately
defined by the use of an external 3.579545MHz
telephone-system Xtal or clock-pulse input.
16kHz performance in the presence of both voice and
noise, can operate from either a single or differential
analogue signal input from which it will produce two
individual logic outputs.
Fig.1 Functional Block Diagram
XTAL/CLOCK
(12kHz/16kHz)
The FX631 is a low-power, system-selectable
Deriving its input directly from the telephone line,
The FX631, which demonstrates high 12kHz and
V
V
XTAL
SIGNAL
SIGNAL
AMP OUT
SYSTEM
IN (+)
IN (-)
DD
BIAS
Detects 12kHz and 16kHz SPM
Detects 12kHz and 16kHz SPM
Detects 12kHz and 16kHz SPM
Detects 12kHz and 16kHz SPM
Detects 12kHz and 16kHz SPM
Frequencies
Frequencies
Frequencies
Frequencies
Frequencies
Lo
Lo
Low P
Lo
Lo
Operation
Operation
Operation
Operation
Operation
High Speec
High Speec
High Speechband Rejection
High Speec
High Speec
Pr Pr
Pr Proper
Pr
oper
operties
oper
oper
w P
w P
w Po o o o o wer (3.0
w P
INPUT AMP
+
XTAL/CLOCK
OSCILLATOR
-
ties
ties
ties
ties
wer (3.0
wer (3.0
wer (3.0
wer (3.0 V V V V V olt
hband Rejection
hband Rejection
hband Rejection
hband Rejection
+20dB
12kHz/16kHz
olt
olt
olt
olt
CML Semiconductor Products
CML Semiconductor Products
FX631
FX631
CML Semiconductor Products
CML Semiconductor Products
CML Semiconductor Products
PRODUCT INFORMATION
PRODUCT INFORMATION
PRODUCT INFORMATION
PRODUCT INFORMATION
PRODUCT INFORMATION
FX631
FX631
FX631
MIN
MIN
MIN
MIN
MIN
LEVEL DETECTOR
CLOCK
OUT
<1.0mA)
<1.0mA)
<1.0mA)
<1.0mA)
<1.0mA)
CLOCK IN
DIVIDER
1
SYSTEM
32
Lo
Lo
Low-V
Lo
Lo
SYSTEM
w-V
w-V
1
w-V
w-Volta
MEASURE
PERIOD
which may be line-powered, is available in 16-pin plastic
DIL and surface mount SOIC and 24-pin plastic SSOP
packages.
DIVIDERS
CLOCK
1. Tone Follower Output - A 'tone-following' logic
2. Packet (Cumulative Tone) Mode Output - To
This system (12kHz/16kHz) selectable microcircuit,
olta
olta
oltag g g g g e SPM Detector
olta
T T T T T one-Follo
Outputs
Outputs
Outputs
Outputs
Outputs
Applications
Applications
Applications
Applications
Applications
one-Follo
one-Follo
one-Follo
one-Follower and P
output producing a “Low” level for the period of a
correct decode and a “High” level for a bad
decode or N
respond and de-respond after a cumulative 40ms
of good tone (or N
This process will ignore small fluctuations or
fades of a valid frequency input and is available
for µProcessor ‘Wake-Up’, Minimum tone
detection, N
avoidance.
FOLLOWER
PACKET
T T T T T elephone Systems
Systems
Systems
Systems
Systems
Systems
Comple
Comple
Comple
Comple
Complex and/or Simple
Call-Char
Call-Char
Call-Charg g g g g e/-Log
Call-Char
Call-Char
LOGIC
LOGIC
TONE
TONE
elephone Systems
elephone Systems
elephone Systems
elephone Systems
e SPM Detector
e SPM Detector
e SPM Detector
e SPM Detector
TONE FOLLOWER
PACKET MODE
OUTPUT
Publication D/631/8 July 1998
OTONE
OUTPUT
OTONE
wer and P
wer and P
wer and P
wer and Pac
x and/or Simple
x and/or Simple
x and/or Simple
x and/or Simple
V
SS
.
OTONE
indication or transient
e/-Log
e/-Log
e/-Logging
e/-Log
) in any 48ms period.
FX631
FX631
FX631
FX631
FX631
ging
ging
ging
ging
ac
ac
ac
acket Mode
ket Mode
ket Mode
ket Mode
ket Mode

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FX631 Summary of contents

Page 1

... Xtal or clock-pulse input. The FX631, which demonstrates high 12kHz and 16kHz performance in the presence of both voice and noise, can operate from either a single or differential analogue signal input from which it will produce two individual logic outputs ...

Page 2

... within the FX631 are dependant upon this supply. This pin should be decoupled capacitor mounted close to the pin. Note that if this device is ‘line’ powered, the resulting supply must be stable. See notes on Microcircuit Protection from high and spurious line voltages. ...

Page 3

... Differential Input Tip (a) Ring ( Fig.3 Example Input Configurations V DD XTAL/CLOCK 1 16 XTAL 2 15 CLOCK OUT CLOCK IN FX631DW BIAS External Components External Components External Components External Components External Components Value Value Value Value Value 1 ...

Page 4

Application Inf Application Inf ormation ...... ormation ...... Application Inf Application Inf Application Information ...... ormation ...... ormation ...... -10 -15 -20 MUST DECODE LEVEL -25 MUST NOT DECODE LEVEL -30 -35 -40 -45 MINIMUM AMPLIFIER GAIN -50 -25 -20 ...

Page 5

... Microcircuit Protection Microcircuit Protection Telephone systems may have high d.c. and a.c. voltages present on the line. If the FX631 is part of a host equipment that has its own signal input protection circuitry, there will be no need for further protection as long as the voltage on any pin is limited to within ...

Page 6

... Tone Follower Output Response and De-Response Times Packet Mode Output Response and De-Response Times 25°C AMB 25°C AMB FX631DW/D5/P FX631DW/D5/P FX631DW/D5/P FX631DW/D5/P FX631DW/D5/P : FX631DW/D5/P FX631DW/D5/P FX631DW/D5/P FX631DW/D5/P FX631DW/D5/P See Note See Note See Note Min. Min. Min. See Note See Note Min. Min ...

Page 7

Specification ...... Specification ...... Specification ...... Specification ...... Specification ...... Notes Notes Notes Notes Notes 3. 5. With adherence to Signal-to-Voice and Signal-to Noise specifications. 4. With Input Amp gain setting: ...

Page 8

... CML does not assume any responsibility for the use of any circuitry described. No circuit patent licences are implied and CML reserves the right at any time without notice to change the said circuitry. Handling Precautions The FX631 is a CMOS LSI circuit which includes input protection. However precautions should be taken to prevent static discharges which may cause damage. ...

Page 9

... CML Microcircuits Product Prefix Codes Until the latter part of 1996, the differentiator between products manufactured and sold from MXCOM, Inc. and Consumer Microcircuits Limited were denoted by the prefixes MX and FX respectively. These products use the same silicon etc. and today still carry the same prefixes. ...

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