CMX602A [CMLMICRO]
Calling Line Identifier plus Call Waiting Type II; 主叫线路识别码以及呼叫等待II型
| 型号： | CMX602A |
| 厂家： | 
CML MICROCIRCUITS |
| 描述： | Calling Line Identifier plus Call Waiting Type II |
| 文件： | 总25页 (文件大小：663K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
CML Semiconductor Products
Calling Line Identifier
plus Call Waiting (Type II)
CMX602A
D/602A/4 February 1998
Provisional Issue
Features
Applications
· CLI and CIDCW System Operation
· Low Power Operation 0.5mA at 2.7V
· CLI and CIDCW Adjunct Boxes
· CLI and CIDCW Feature Phones
· Zero-Power Ring or Line Reversal
· Bellcore, ETSI, British Telecom and
Detector
Mercury Systems
· FSK Demodulator with Data Retiming
· High Sensitivity CAS Tone Detection
· Computer Telephone Integration
· Call Logging Systems
· Low CAS Tone Falsing in CIDCW Mode · Voice-Mail Equipment
1.1
Brief Description
The CMX602A is a low power CMOS integrated circuit for the reception of the physical layer signals used in
BT's Calling Line Identification Service (CLIP), Bellcore's Calling Identity Delivery System (CID), the Cable
Communications Association's Caller Display Services (CDS), and similar evolving systems. It also meets the
requirements of emerging Caller Identity with Call Waiting services (CIDCW).
The device includes a 'zero-power' ring or line reversal detector, a dual-tone (2130Hz plus 2750Hz) Tone Alert
Signal and a 1200-baud FSK V23/Bell202 compatible asynchronous data demodulator with a data retiming
circuit which removes the need for a UART in the associated µController.
It is suitable for use in systems to BT specifications SIN227 and SIN242, Bellcore GR-30-CORE and SR-TSV-
002476, CCA TW/P&E/312, ETSI ETS 300 659 parts 1 and 2, ETS 300 778 parts 1 and 2 and Mercury
Communications MNR 19.
ã 1998 Consumer Microcircuits Limited
Calling Line Identifier
CMX602A
CONTENTS
Section
Page
1.1 Brief Description ............................................................................................1
1.2 Block Diagram ................................................................................................3
1.3 Signal List .......................................................................................................4
1.4 External Components....................................................................................6
1.5 General Description .......................................................................................7
1.5.1 Mode Control Logic .......................................................................7
1.5.2 Input Signal Amplifier....................................................................7
1.5.3 Bandpass Filter ..............................................................................8
1.5.4 Level Detector.................................................................................8
1.5.5 FSK Demodulator...........................................................................9
1.5.6 FSK Data Retiming.........................................................................9
1.5.7 Tone Alert Detector......................................................................10
1.5.8 Ring or Line Polarity Reversal Detector ....................................11
1.5.9 Xtal Osc and Clock Dividers .......................................................13
1.6 Application Notes.........................................................................................14
1.6.1 'On-Hook' Operation ....................................................................14
1.6.2 'Off-Hook' Operation....................................................................17
1.7 Performance Specification..........................................................................19
1.7.1 Electrical Performance ................................................................19
1.7.2 Packaging .....................................................................................23
ã 1998 Consumer Microcircuits Limited
2
D/602A/4
Calling Line Identifier
CMX602A
1.2
Block Diagram
Figure 1 Block Diagram
ã 1998 Consumer Microcircuits Limited
3
D/602A/4
Calling Line Identifier
CMX602A
1.3
Signal List
Packages
D4 / P3
Signal
Description
Pin No.
Name
XTALN
Type
O/P
1
2
3
The output of the on-chip Xtal oscillator inverter.
The input to the on-chip Xtal oscillator inverter.
XTAL
RD
I/P
I/P (S)
Input to the Ring or Line Polarity Reversal
Detector.
4
RT
BI
Open-drain output and Schmitt trigger input
forming part of the Ring or Line Polarity Reversal
detector. An external resistor to V and a
DD
capacitor to V should be connected to RT to
SS
filter and extend the RD input signal.
5
6
7
AOP
INV
BI
The output of the on-chip Input Signal Amplifier
and the input to the Bandpass Filter.
I/P
I/P
The inverting input to the on-chip Input Signal
Amplifier.
NINV
The non-inverting input to the on-chip Input
Signal Amplifier.
8
9
V
V
Power
O/P
Negative supply rail (signal ground).
SS
Internally generated bias voltage, held at V /2
BIAS
DD
when the device is not in 'Zero-Power' mode.
Should be decoupled to V by a capacitor
SS
mounted close to the device pins.
10
11
MODE
ZP
I/P (S)
I/P (S)
Input used to select the operating mode. See
section 1.5.1.
A high level on this input selects 'Zero-Power'
mode, a low level enables the V
supply, the
BIAS
Input Signal Amplifier, the Bandpass Filter and
either the FSK or the Tone Alert circuits
depending on the MODE input.
ã 1998 Consumer Microcircuits Limited
4
D/602A/4
Calling Line Identifier
CMX602A
Packages
D4 / P3
Signal
Description
Pin No.
Name
IRQN
Type
O/P
12
An open-drain active low output that may be
used as an Interrupt Request / Wake-up input to
the associated µC. An external pull-up resistor
should be connected between this output and
V
DD
.
13
DET
O/P
A logic level output driven by the Ring or Line
Polarity Reversal Detector, the Tone Alert
Detector or the FSK Level detect circuits,
depending on the operating mode. See section
1.5.1.
14
15
RXCK
RXD
I/P (S)
O/P
An input which may be used to clock received
data bits out of the FSK Data Retiming block.
A logic level output carrying either the raw output
of the FSK Demodulator or re-timed 8-bit
characters depending on the state of the RXCK
input. See section 1.5.6
16
V
DD
Power
The positive supply rail. Levels and thresholds
within the device are proportional to this voltage.
Should be decoupled to V
by a capacitor
SS
mounted close to the device pins.
Notes: I/P
= Input
I/P (S) = Schmitt trigger input
O/P
BI
= Output
= Bidirectional
ã 1998 Consumer Microcircuits Limited
5
D/602A/4
Calling Line Identifier
CMX602A
1.4
External Components
R1
470kW
R2
See section 1.5.8
470kW
470kW
C1, C2
C3, C4
C5
C6, C7
C8,C9
18pF
R3, R4, R5
R6, R7
R8
0.1mF
0.33mF
680pF
0.1mF
470kW for V = 3.3V
DD
680kW for V = 5.0V
DD
(See section 1.5.2)
R9
240kW for V = 3.3V
DD
200kW for V = 5.0V
DD
(See section 1.5.2)
160kW
100kW ±20%
R10
R11
X1
D1 - D4
3.579545MHz
1N4004
Resistors ±1%, capacitors ±20% unless otherwise stated.
Figure 2 Recommended External Components for Typical Application
It is recommended that the printed circuit board is laid out with a ground plane in the CMX602A area to provide
a low impedance ground connection to the V pin and to the decoupling capacitors C8 and C9.
SS
ã 1998 Consumer Microcircuits Limited
6
D/602A/4
Calling Line Identifier
CMX602A
1.5
General Description
1.5.1 Mode Control Logic
The CMX602A's operating mode and the source of the DET and IRQN outputs are determined by the logic
levels applied to the MODE and ZP input pins;
ZP
0
MODE
Mode
Tone Alert Detect
DET o/p from
Tone Alert Signal
Detection
IRQN o/p from
Valid ‘off-hook’ CAS.
Ring or Line Polarity
Reversal Detector.
FSK Data Retiming
Ring or Line Polarity
Reversal Detector.
Ring or Line Polarity
Reversal Detector.
0
[1]
0
1
1
1
0
1
FSK Receive
'Zero-Power'
'Zero-Power'
FSK Level Detector
.
Ring or Line Polarity
Reversal Detector.
Ring or Line Polarity
Reversal Detector.
-
[1]
If enabled.
In the 'Zero-Power' modes, power is removed from all of the internal circuitry except for the Ring or Line
Polarity Reversal Detector and the DET and IRQN outputs.
1.5.2 Input Signal Amplifier
This amplifier is used to convert the balanced FSK and Tone Alert signals received over the telephone line to
an unbalanced signal of the correct amplitude for the FSK receiver and Tone Alert Detector circuits.
Figure 3a : Input Signal Amplifier, balanced input configuration
The design equations for this circuit are;
Differential voltage gain V
R6 = R7 = 470kW
R10 = 160kW
/ V(b-a) = R8/R6
AOP
R9 = R8 x R10 / (R8 - R10)
The target differential voltage gain depends on the expected signal levels between the A and B wires and the
CMX602A's internal threshold levels, which are proportional to the supply voltage.
ã 1998 Consumer Microcircuits Limited
7
D/602A/4
Calling Line Identifier
CMX602A
The CMX602A has been designed to meet the applicable specifications with R8 = 430kW at V
= 3.0V
DD
nominal, rising to 680kW at V = 5.0V, and R9 should be 240kW at V = 3.0V and 200kW at V = 5.0V as
DD
DD
DD
shown in section 1.4 and Fig 3c.
The Input Signal Amplifier may also be used with an unbalanced signal source as shown in Figure 3b. The
values of R6 and R8 are as for the balanced input case.
Figure 3b : Input Signal Amplifier, unbalanced input configuration
1000
900
800
700
R8
600
500
400
300
R9
200
100
0
3
3.5
4
4.5
5
Nominal V
DD
Figure 3c : Input Signal Amplifier, optimum values of R8 and R9 vs V
DD
1.5.3 Bandpass Filter
Is used to attenuate out of band noise and interfering signals which might otherwise reach the FSK
Demodulator, Tone Alert Detector and Level Detector circuits. The characteristics of this filter differ in FSK and
Tone Alert modes. Most of the filtering is provided by Switched Capacitor stages clocked at 57.7kHz.
1.5.4 Level Detector
This block operates by measuring the level of the signal at the output of the Bandpass Filter, and comparing it
against a threshold which depends on whether FSK Receive or Tone Alert Detect mode has been selected.
In Tone Alert Detect mode the output of the Level Detector block provides an input to the Tone Alert Signal
Detector.
In FSK Receive mode the CMX602A DET output will be set high when the level has exceeded the threshold for
sufficient time. Amplitude and time hysteresis are used to reduce chattering of the DET output in marginal
conditions.
Note that in FSK Receive mode this circuit may also respond to non-FSK signals such as speech.
ã 1998 Consumer Microcircuits Limited
8
D/602A/4
Calling Line Identifier
CMX602A
See section 1.7.1 for definitions of Teon and Teoff
Figure 4 : FSK Level Detector operation
1.5.5 FSK Demodulator
This block converts the 1200 baud FSK input signal to a logic level received data signal which is output via the
RXD pin as long as the Data Retiming function is not enabled (see section 1.5.6). This output does not depend
on the state of the FSK Level Detector output.
Note that in the absence of a valid FSK signal, the demodulator may falsely interpret speech or other
extraneous signals as data.
1.5.6 FSK Data Retiming
The Data Retiming block extracts the 8 data bits of each character from the received asynchronous data
stream, and presents them to the mC under the control of strobe pulses applied to the RXCK input. The timing
of these pulses is not critical and they may easily be generated by a simple software loop. This facility removes
the need for a UART in the mC without incurring an excessive software overhead.
The block operates on a character by character basis by first looking for the mark to space transition which
signals the beginning of the start bit, then, using this as a timing reference, sampling the output of the FSK
Demodulator in the middle of each of the following 8 received data bits, storing the results in an internal 8-bit
shift register.
When the eighth data bit has been clocked into the internal shift register, the CMX602A examines the RXCK
input. If this is low then the IRQN output will be pulled low and the first of the stored data bits put onto the RXD
output pin. On detecting that the IRQN output has gone low, the mC should pulse the RXCK pin high 8 times.
The high to low transition at the end of the first 7 of these pulses will be used by the CMX602A to shift the next
data bit from the shift register onto the RXD output. At the end of the eighth pulse the FSK Demodulator output
will be reconnected to the RXD output pin. The IRQN output will be cleared the first time the RXCK input goes
high.
Thus to use the Data Retiming function, the RXCK input should be kept low until the IRQN output goes low; if
the Data Retiming function is not required the RXCK input should be kept high.
The only restrictions on the timing of the RXCK waveform are those shown in Figure 5a and the need to
complete the transfer of all eight bits into the mC within 8.3ms (the time of a complete character at 1200 baud).
ã 1998 Consumer Microcircuits Limited
9
D/602A/4
Calling Line Identifier
CMX602A
td = Internal CMX602A delay; max. 1mS
tclo = RXCK low time; min 1mS
tchi = RXCK high time; min 1mS
Figure 5a : FSK Operation With Data Retiming
Note that, if enabled, the Data Retiming block will interpret the FSK Channel Seizure signal (a sequence of
alternating mark and space bits) as valid received characters, with values of 55 (hex). Similarly it may interpret
speech or other signals as random characters.
If the Data Retiming facility is not required, the RXCK input to the CMX602A should be kept high. The
asynchronous data from the FSK Demodulator will then be connected directly to the RXD output pin, and the
IRQN output will not be activated by the FSK signal. This case is illustrated in Figure 5b.
Figure 5b : FSK Operation Without Data Retiming (RXCK always high)
1.5.7 Tone Alert Detector
This block is enabled when the CMX602A is set to Tone Alert Detect mode. It will then monitor the received
signal for the presence of simultaneous 2130 and 2750Hz tones of sufficient level and duration.
Two digital bandpass filters, centred around 2130Hz and 2750Hz, are used within the block to give additional
rejection of interfering signals.
The CMX602A DET output will be set high while a Tone Alert signal is detected.
When the DET output goes low at the end of the Tone Alert signal, then if the DET output had been high for a
time within the CAS qualifying time TqCAS limits (see 1.7.1) , then the IRQN output will be pulled low and will
remain low until the CMX602A is switched out of Tone Alert Detect mode. Note that the TqCAS timing has been
optimised for the detection of 75 to 85ms Tone Alert (CAS) signals used in off-hook applications, the longer (88
to 110ms) Tone Alert signal employed by BT for on-hook applications will not necessarily cause IRQN to go
low.
ã 1998 Consumer Microcircuits Limited
10
D/602A/4
Calling Line Identifier
CMX602A
See section 1.7.1 for definitions of Tton, Ttoff and TqCAS
Figure 6 : Tone Alert Detector operation
1.5.8 Ring or Line Polarity Reversal Detector
These circuits are used to detect the Line Polarity Reversal and Ringing signals associated with the Calling
Line Identification protocol.
Figure 7 illustrates their use in a typical application.
Figure 7 : Ring or Line Polarity Reversal operation
ã 1998 Consumer Microcircuits Limited
11
D/602A/4
Calling Line Identifier
CMX602A
When no signal is present on the telephone line, RD will be at V and RT pulled to V by R5 so the output of
SS
DD
the Schmitt trigger 'B' will be low.
The ring signal is usually applied at the subscriber's exchange as an ac voltage inserted in series with one of
the telephone wires and will pass through either C3 and R3 or C4 and R4 to appear at the top end of R1 (point
X in Figure 7) in a rectified and attenuated form.
The signal at point X will be further attenuated by the potential divider formed by R1 and R2 before being
applied to the CMX602A input RD . If the amplitude of the signal appearing at RD is greater than the input
threshold (Vthi) of Schmitt trigger 'A' then the N transistor connected to RT will be turned on, pulling the voltage
at RT to V by discharging the external capacitor C5. The output of the Schmitt trigger 'B' will then go high,
SS
activating the DET and/or IRQN outputs depending on the states of the MODE and ZP inputs.
The minimum amplitude ringing signal that is certain to be detected is
( 0.7 + Vthi x [R1 + R2 + R3] / R2 ) x 0.707 Vrms
where Vthi is the high-going threshold voltage of the Schmitt trigger A (see section 1.7).
With R1, R3 and R4 all 470kW as Figure 2, then setting R2 to 68kW will guarantee detection of ringing signals
of 40Vrms and above for V
over the range 2.7 to 5.5V.
DD
A line polarity reversal may be detected using the same circuit but there will be only one pulse at RD. The BT
specification SIN242 says that the circuit must detect a +15V to -15V reversal between the two lines slewing in
30ms. For a linearly changing voltage at the input to C3 (or C4), then the voltage appearing at the RD pin will
be
dV/dt x C3 x [ 1 - exp(-t/T) ] x R2
where T = C3 x (R1 + R2 + R3) and dV/dt is the input slew rate.
For dV/dt = 500V/sec (15V in 30ms), R1, R3 and R4 all 470kW and C3, C4 both 0.1mF as Figure 2, then setting
R2 to 390kW will guarantee detection at V
= 5.5V.
DD
If the time constant of R5 and C5 is large enough then the voltage on RT will remain below the threshold of the
'B' Schmitt trigger keeping the DET and/or IRQN outputs active for the duration of a ring cycle
The time for the voltage on RT to charge from V towards V
can be derived from the formula
SS
DD
V
= V
x [1 - exp(-t/(R5 x C5)) ]
DD
RT
As the Schmitt trigger high-going input threshold voltage (Vthi) has a minimum value of 0.56 x V
, then the
DD
Schmitt trigger B output will remain high for a time of at least 0.821 x R5 x C5 following a pulse at RD.
Using the values given in Figure 2 (470kW and 0.33mF) gives a minimum time of 100 ms (independent of V ),
DD
which is adequate for ring frequencies of 10Hz or above.
If necessary, the µC can distinguish between a ring and a reversal by timing the length of the IRQN or DET
output.
ã 1998 Consumer Microcircuits Limited
12
D/602A/4
Calling Line Identifier
CMX602A
1.5.9 Xtal Osc and Clock Dividers
Frequency and timing accuracy of the CMX602A is determined by a 3.579545MHz clock present at the XTAL
pin. This may be generated by the on-chip oscillator inverter using the external components C1, C2 and X1 of
Figure 2, or may be supplied from an external source to the XTAL input, in which case C1, C2 and X1 should
not be fitted.
The oscillator is turned off in the 'Zero-Power' modes.
If the clock is provided by an external source which is not always running, then the ZP input must be set high
when the clock is not available. Failure to observe this rule may cause a significant rise in the supply current
drawn by CMX602A as well as generating undefined states of the RXD, DET and IRQN outputs.
ã 1998 Consumer Microcircuits Limited
13
D/602A/4
Calling Line Identifier
CMX602A
1.6
Application Notes
1.6.1 'On-Hook' Operation
The systems described in this section operate when the telephone set is not in use (on-hook) to display the
number of a calling party before the call is answered.
British Telecom System
Figure 8a illustrates the line signalling and CMX602A I/O signals for the BT on-hook Calling Line ID system as
defined in BT specifications SIN227 and SIN242 part 1. A similar system is described in ETS 300 659-1 section
6.1.2c.
The Tone Alert signal consists of simultaneous 2130Hz and 2750Hz tones, the 'Chan Seize' signal is a '1010..'
FSK bit sequence. Not shown are the requirements for AC and DC loads, including a short initial Current
Wetting Pulse, to be applied to the line 20ms after the end of the Tone Alert signal and to be maintained during
reception of the FSK signal. Note that, for simplicity of presentation, the Data Retiming function is not used in
Figure 8a (RXCK is kept high).
Figure 8a : BT On-hook System Signals
Bellcore System
Figure 8b illustrates the line signalling and CMX602A I/O signals for the Bellcore on-hook Caller ID system as
defined in Bellcore documents GR-30-CORE and SR-TSV-002476 and also in ETS 300 659-1 section 6.1.1.
As for the BT system, the 'Chan Seize' signal is a '1010..' FSK bit sequence. The Bellcore specifications do not
require AC or DC line terminations while the FSK data is being received, however ETS 300 659-1 allows for the
possibility of an AC termination being applied. Note that, for simplicity of presentation, the Data Retiming
function is not used in Figure 8b (RXCK is kept high).
ã 1998 Consumer Microcircuits Limited
14
D/602A/4
Calling Line Identifier
CMX602A
Figure 8b : Bellcore On-hook System Signals
Other On-hook Systems
ETS 300 659-1 also allows for systems where the FSK transmission is preceded by a Dual Tone Alerting signal
similar to that used by BT but without a line reversal (section 6.1.2a) or by a Ringing Pulse Alerting Signal
(section 6.1.2b).
The U.K. CCA (Cable Communications Association) specification TW/P&E/312 precedes the FSK signals by a
200 to 450ms ring burst. AC and DC line terminations during FSK reception are optional.
Mercury Communications Ltd. specification MNR 19 allows for either the BT system or that specified by CCA.
As these are all slight variants on the BT and Bellcore systems, they can also be handled by the CMX602A.
ã 1998 Consumer Microcircuits Limited
15
D/602A/4
Calling Line Identifier
CMX602A
Figure 8c : Flow Chart for On-hook Operation of CMX602A
ã 1998 Consumer Microcircuits Limited
16
D/602A/4
Calling Line Identifier
CMX602A
1.6.2 'Off-Hook' Operation
The CIDCW (Calling Identity on Call Waiting) system described in this section operates when the telephone set
is in use (off-hook) to display the number of a waiting caller without interrupting the current call.
Bellcore documents GR-30-CORE and SR-TSV-002476, BT specifications SIN227 and SIN242 Part 2 and ETS
300-659-2 all describe similar systems in which a successful CIDCW transaction consists of a sequence of
actions between the CPE (Customer Premises Equipment - e.g. a telephone) and the Central Office as
indicated in Figure 9a.
A.
B.
C.
D.
E.
F.
Normal conversation with both near and far end voice present.
Central Office mutes far end voice, sends CAS and becomes silent.
CPE recognises CIDCW initiation and mutes near end voice and keypad.
CPE sends dtmf ACK to Central Office to signal its readiness to receive FSK data.
Central Office recognises ACK and sends FSK Caller ID data to CPE.
CIDCW transaction is complete. CPE unmutes near end voice and the Central Office
unmutes far end voice, returning to normal conversation.
Figure 9a : CIDCW Transaction from Near End CPE Perspective
The CAS signal is transmitted by the Central Office to initiate a CIDCW transaction and consists of a 80ms
burst of simultaneous 2130Hz and 2750Hz tones.
CAS detection is very important because a “missed” signal causes Caller ID information to be lost and a false
signal detection produces a disruptive tone which is heard by the far end caller. Because the CAS signals must
be detected in the presence of conversations which both mask and masquerade as the tone signals, this
function is difficult to accomplish correctly.
Because the numbers of false responses (Talk-offs) and missed signals (Talk-downs) are related to the speech
levels at the CMX602A input, and because the level of near end speech from the local handset is normally
greater than that of far end speech coming from the Central Office, a further improvement in overall
performance can be obtained by taking the CMX602A’s audio input from the receive side of the telephone set
hybrid where this is possible.
The internal algorithms used by the CMX602A to drive the DET and IRQN outputs in Tone Alert Detect mode
have been optimised for the detection of off-hook CAS signals in the presence of speech when used according
to the following principles:
1.
If it is possible to mute the local speech from the microphone rapidly (within 0.5ms) without introducing
noise (i.e. where the CIDCW equipment is built into the telephone set) then this should be done
whenever the CMX602A is in Tone Detect mode and the DET output is high. Doing this will markedly
reduce the number of false responses generated by local (near end) speech. Note that the DET output
is not used for any other purpose in an off-hook application when the CMX602A is set to Tone Alert
Detect mode.
ã 1998 Consumer Microcircuits Limited
17
D/602A/4
Calling Line Identifier
CMX602A
2.
The IRQN output going low when in Tone Alert Detect mode indicates that a CAS has been detected.
The local handset and keypad should then be muted as required by the Bellcore specification and the
CMX602A switched to FSK Receive mode to be ready to receive the FSK data, doing this will also
clear the IRQN output.
3.
The CMX602A’s DET output should be monitored for a period of 50ms after changing to FSK Receive
mode, before sending the ACK signal, and the transaction abandoned if the DET output goes high
during this time, which would be the case if a false CAS detect had been caused by far end speech.
Figure 9b : Flow Chart for Off-hook Operation of CMX602A
ã 1998 Consumer Microcircuits Limited
18
D/602A/4
Calling Line Identifier
CMX602A
1.7
Performance Specification
1.7.1 Electrical Performance
Absolute Maximum Ratings
Exceeding these maximum ratings can result in damage to the device.
Min.
Max.
Units
Supply (V
Voltage on any pin to V
Current into or out of V and V pins
Current into or out of any other pin
- V
)
SS
-0.3
-0.3
-30
-20
7.0
V
V
mA
mA
DD
V
DD
+ 0.3
SS
+30
+20
DD
SS
D4 / P3 Packages
Total Allowable Power Dissipation at Tamb = 25°C
... Derating
Storage Temperature
Operating Temperature
Min.
Max.
800
13
+125
+85
Units
mW
mW/°C
°C
-55
-40
°C
Operating Limits
Correct operation of the device outside these limits is not implied.
Notes
Min.
2.7
Max.
5.5
Units
V
Supply (V - V
)
SS
DD
Operating Temperature
Xtal frequency
2
1
-40
3.575965
+85
3.583125
°C
MHz
Notes: 1. An Xtal frequency of 3.579545MHz ±0.1% is required for correct Tone Alert and FSK detection.
2. Operating temperature range -10°C to +60°C at V < 3.0V.
DD
ã 1998 Consumer Microcircuits Limited
19
D/602A/4
Calling Line Identifier
CMX602A
Operating Characteristics
For the following conditions unless otherwise specified:
V
DD
= 2.7V at Tamb = -10 to +60°C and V = 3.3V to 5.5V at Tamb = -40 to +85°C,
DD
Xtal Frequency = 3.579545MHz ± 0.1%
0dBV corresponds to 1.0Vrms
Notes
Min.
Typ.
Max.
Units
DC Parameters
I
I
I
(ZP input high) at V = 5.0V
1,2
1
1
0.02
0.5
1.0
1.0
1.0
2.0
µA
mA
mA
DD
DD
DD
DD
(ZP input low) at V = 3.0V
DD
(ZP input low) at V = 5.0V
DD
Logic '1' input level (RXCK and XTAL inputs)
Logic '0' input level (RXCK and XTAL inputs)
70%
-1.0
V
V
µA
DD
30%
+1.0
DD
Logic input leakage current (Vin = 0 to V
excluding XTAL input
)
DD
Output logic '1' level (l = 360µA)
V
DD
- 0.4
V
V
µA
OH
Output logic '0' level (l = 360µA)
0.4
1.0
OL
IRQN o/p 'off' state current (Vout = V
)
DD
Schmitt Trigger input thresholds, see fig 10
High going (Vthi)
0.56V
0.44V
0.56V
+ 0.6V
V
V
DD
DD
Low going (Vtlo)
0.44V
DD
DD
- 0.6V
Tone Alert Detector
'Low' tone nominal frequency
'High' tone nominal frequency
Start of Tone Alert signal to DET high time
(Fig. 6 Tton)
2130
2750
55.0
Hz
Hz
ms
End of Tone Alert signal to DET and IRQN low
time (Fig 6 Ttoff)
DET high time to ensure IRQN goes low
(Fig 6 TqCAS)
0.5
8.0
10.0
45.0
ms
ms
To ensure detection:
3
4
5
'Low' tone frequency tolerance
'High' tone frequency tolerance
Level (per tone)
2750Hz tone level wrt
2130Hz tone level
Signal to Noise ratio
±20
±30
-2.2
Hz
Hz
dBV
-40.0
-7.0
20.0
75
+7.0
85
dB
dB
ms
ms
Dual tone burst duration for DET output
Dual tone burst duration to ensure
IRQN goes low
75
To ensure non-detection:
'Low' tone frequency tolerance
'High' tone frequency tolerance
Level (total)
6
4
±75
±95
Hz
Hz
dBV
ms
-46.0
45.0
Dual tone burst duration
ã 1998 Consumer Microcircuits Limited
20
D/602A/4
Calling Line Identifier
CMX602A
Notes
Min.
Typ.
Max.
Units
FSK Receiver
Transmission rate
1188
1280
2068
1188
2178
-40.0
1200
1300
2100
1200
2200
1212
1320
2132
1212
2222
-8.0
Baud
Hz
Hz
Hz
Hz
V23 Mark (logical 1) frequency
V23 Space (logical 0) frequency
Bell202 Mark (logical 1) frequency
Bell202 Space (logical 0) frequency
Valid input level range
4
dBV
Acceptable twist (mark level wrt space level)
V23
-7.0
-10.0
+7.0
+10.0
dB
dB
Bell202
Acceptable Signal to Noise ratio
V23
5
5
4
20.0
30.0
dB
dB
dBV
ms
Bell202
Level Detector 'on' threshold level
Level Detector 'off' to 'on' time (Fig 4 Teon)
Level Detector 'on' to 'off' time (Fig 4 Teoff)
-40.0
25.0
8.0
ms
Input Signal Amplifier
Input impedance
Voltage gain
7
10.0
MW
V/V
500
XTAL Input
'High' pulse width
'Low' pulse width
8
8
100
100
ns
ns
Notes:
1. At 25°C, not including any current drawn from the CMX602A pins by external circuitry
other than X1, C1 and C2.
2. RD, MODE, RXCK inputs at V , ZP input at V . See also Figure 11.
SS
DD
3. All conditions must be met to ensure detection.
4. For V = 5.0V with equal level tones and with the input signal amplifier external components
DD
as section 1.4. The internal threshold levels are proportional to V . To cater for other supply
DD
voltages or different signal level ranges the voltage gain of the input signal amplifier should be
adjusted by selecting the appropriate external components as described in section 1.5
5. Flat noise in 300 - 3400Hz band for V23, 200 - 3200Hz for Bell202.
6. Meeting any of these conditions will ensure non-detection.
7. Open loop, small signal low frequency measurements.
8. Timing for an external input to the CLOCK/XTAL pin.
ã 1998 Consumer Microcircuits Limited
21
D/602A/4
Calling Line Identifier
CMX602A
4
3.5
3
Vthi
2.5
2
Vin
1.5
1
Vtlo
4.5
0.5
0
3
3.5
4
5
5.5
V
DD
Figure 10 : Schmitt Trigger typical input voltage thresholds vs. V
DD
10
1
0.1
0.01
0.001
0.0001
-40
-30
-20
-10
0
10
20
30
40
50
60
70
80
Temperature
Figure 11 : Typical 'Zero Power' I vs. Temperature (V = 5.0V)
DD
DD
1998 Consumer Microcircuits Limited
22
D/602A/4
Calling Line Identifier
CMX602A
1.7.2 Packaging
Figure 12 : 16-pin SOIC (D4) Mechanical Outline: Order as part no. CMX602AD4
Figure 13 : 16-pin DIL (P3) Mechanical Outline: Order as part no. CMX602AP3
Handling precautions: This product includes input protection, however, precautions should be taken to prevent
device damage from electro-static discharge. CML does not assume any responsibility for the use of any
circuitry described. No IPR or circuit patent licences are implied. CML reserves the right at any time without
notice to change the said circuitry and this product specification. CML has a policy of testing every product
shipped using calibrated test equipment to ensure compliance with this product specification. Specific testing
of all circuit parameters is not necessarily performed.
CONSUMER MICROCIRCUITS LIMITED
1 WHEATON ROAD
WITHAM - ESSEX
CM8 3TD - ENGLAND
Telephone:
Telefax:
e-mail:
+44 1376 513833
+44 1376 518247
sales@cmlmicro.co.uk
http://www.cmlmicro.co.uk
CML Microcircuits
COMMUNICATION SEMICONDUCTORS
CML Product Data
In the process of creating a more global image, the three standard product semiconductor
companies of CML Microsystems Plc (Consumer Microcircuits Limited (UK), MX-COM, Inc
(USA) and CML Microcircuits (Singapore) Pte Ltd) have undergone name changes and, whilst
maintaining their separate new names (CML Microcircuits (UK) Ltd, CML Microcircuits (USA)
Inc and CML Microcircuits (Singapore) Pte Ltd), now operate under the single title CML Micro-
circuits.
These companies are all 100% owned operating companies of the CML Microsystems Plc
Group and these changes are purely changes of name and do not change any underlying legal
entities and hence will have no effect on any agreements or contacts currently in force.
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.
In the latter part of 1996, both companies adopted the common prefix: CMX.
This notification is relevant product information to which it is attached.
Company contact information is as below:
CML Microcircuits
(UK)Ltd
CML Microcircuits
(USA) Inc.
CML Microcircuits
(Singapore)PteLtd
COMMUNICATION SEMICONDUCTORS
COMMUNICATION SEMICONDUCTORS
COMMUNICATION SEMICONDUCTORS
Oval Park, Langford, Maldon,
Essex, CM9 6WG, England
Tel: +44 (0)1621 875500
Fax: +44 (0)1621 875600
uk.sales@cmlmicro.com
www.cmlmicro.com
4800 Bethania Station Road,
Winston-Salem, NC 27105, USA
Tel: +1 336 744 5050,
0800 638 5577
Fax: +1 336 744 5054
us.sales@cmlmicro.com
www.cmlmicro.com
No 2 Kallang Pudding Road, 09-05/
06 Mactech Industrial Building,
Singapore 349307
Tel: +65 7450426
Fax: +65 7452917
sg.sales@cmlmicro.com
www.cmlmicro.com
D/CML (D)/1 February 2002
CML Microcircuits
COMMUNICATION SEMICONDUCTORS
CML Product Data
In the process of creating a more global image, the three standard product semiconductor
companies of CML Microsystems Plc (Consumer Microcircuits Limited (UK), MX-COM, Inc
(USA) and CML Microcircuits (Singapore) Pte Ltd) have undergone name changes and, whilst
maintaining their separate new names (CML Microcircuits (UK) Ltd, CML Microcircuits (USA)
Inc and CML Microcircuits (Singapore) Pte Ltd), now operate under the single title CML Micro-
circuits.
These companies are all 100% owned operating companies of the CML Microsystems Plc
Group and these changes are purely changes of name and do not change any underlying legal
entities and hence will have no effect on any agreements or contacts currently in force.
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.
In the latter part of 1996, both companies adopted the common prefix: CMX.
This notification is relevant product information to which it is attached.
Company contact information is as below:
CML Microcircuits
(UK)Ltd
CML Microcircuits
(USA) Inc.
CML Microcircuits
(Singapore)PteLtd
COMMUNICATION SEMICONDUCTORS
COMMUNICATION SEMICONDUCTORS
COMMUNICATION SEMICONDUCTORS
Oval Park, Langford, Maldon,
Essex, CM9 6WG, England
Tel: +44 (0)1621 875500
Fax: +44 (0)1621 875600
uk.sales@cmlmicro.com
www.cmlmicro.com
4800 Bethania Station Road,
Winston-Salem, NC 27105, USA
Tel: +1 336 744 5050,
0800 638 5577
Fax: +1 336 744 5054
us.sales@cmlmicro.com
www.cmlmicro.com
No 2 Kallang Pudding Road, 09-05/
06 Mactech Industrial Building,
Singapore 349307
Tel: +65 7450426
Fax: +65 7452917
sg.sales@cmlmicro.com
www.cmlmicro.com
D/CML (D)/1 February 2002
相关型号：
©2020 ICPDF网 联系我们和版权申明