CML MX613 Global call progress detector Datasheet

DATA BULLETIN
MX613
Global Call Progress Detector
PRELIMINARY INFORMATION
• Analog In / Serial Data Out
• µProcessor Compatible Outputs
• Speech Discrimination Ability
• Low Power Operation
• MX•COM MiXed Signal CMOS
• Covers Worldwide Call Progress Frequencies
(300Hz TO 2150Hz)
• Decode Single or Modulated Tones
SERIAL CLOCK
SERIAL OUTPUT
PORT (6-BITS)
DATA OUT
0 1 2 3 4 5
CHIP SELECT
V DD
CS
LATCH
AVAILABLE
PACKAGES
TIME
COUNT
f
SIGNAL IN
FILTER &
BAND SELECTOR
FREQUENCY
COUNTER
f/4
HI / LO BAND
LEVEL IN
MX613DW
16-pin SOIC
RESET
LEVEL
DETECTOR
DECODE
ON / OFF
VBIAS
HI / LO
V SS
f/4
SIGNAL QUALITY
ASSESSOR
GOOD/BAD
LOGIC
RESET
RESET
MX613P
14-pin PDIP
CS
HI / LO
TIME
XTAL/CLOCK
3.579545MHz
CLOCK
GENERATOR
TIMER
LO = 39.4ms
HI = 13.16ms
IRQ
XTAL
The MX613 is a wide-band, ‘N-Tone’ non-predictive tone decoder that measures telephone system call progress
tones in PABX, Pay/Feature-Phone, Fax and Modem systems.
Adhering to Must/Must-Not Decode limits and able to measure inband frequencies in outband modulation, this
decoder measures the frequency of input signals in the range 300 to 2,150Hz. The result of each measurement is
presented to a system µProcessor as a 6-bit serial word.
The decode frequency range, which covers the world's call progress application spectrum, is processed internally
as two bands: LO = 300 to 660Hz and HI = 900 to 2150Hz. Frequency measurement is achieved by counting the
number of cycles in a set time period
(LO = 39.47ms or HI = 13.16ms). Bad signal/level quality or NOTONE results in a count-abort, timing-reset and no
output from the decoder.
Front-end filtering is achieved using our patented Auto-Correlator. Current frequency information is output for the
µProcessor using a Serial Data, Clock and Interrupt interface.
Data from the MX613 should be processed by a µProcessor whose algorithms are able to recognize the
frequency, sequence and/or cadence of input signals as national call progress information; e.g.: ‘Dial,’ ‘Busy,’
‘Number-Unobtainable,’ ‘Ringing’ and automatic tones used by fax and modem systems. Software can be simply
configured to reject speech frequencies.
Available in SOIC and PDIP packages, this low-cost, mixed signal IC has a typical power requirement of less
than 1mA at 3 volts and utilizes a telecom-system clock input of 3.579545MHz to maintain frequency accuracy.
© 1997 MX•COM Inc.
www.mxcom.com Tele: 800 638-5577 910 744-5050 Fax: 910 744-5054
Doc. # 20480086.003
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USAAll trademarks and service marks are held by their respective companies
Global Call Progress Tone Detector
Pin Number
2
MX613
Preliminary Information
Function
MX613DW MX613P
1
1
Xtal/Clock: The input to the on-chip clock oscillator inverter. A 3.579545MHz Xtal or
externally derived telephone system clock (fXTAL) should be connected here. Operation
of the MX613 without a suitable Xtal/Clock input may cause device damage.
2
2
Xtal: The output of the on-chip clock oscillator inverter. See Figure 2.
3
3
No internal connection.
4
4
VBIAS: The internal circuitry bias line, held at VDD/2 this pin must be decoupled to VSS.
5
5
Level In: The input for level discrimination. This input is internally biased to VBIAS. Signals
must be a.c. coupled, and the audio signal must be fed to both this pin and the Signal In
pin. Correct level detection determines the operation of this device (see Principles of
Decoder Operation). But if you wish to disregard the amplitude of the input levels, the
MX613 may be permanently enabled by pulling this pin to VDD and disabled by pulling to
VSS.
6
6
Signal In: The input for frequency discrimination and decoding. This input is internally
biased to VBIAS. Signals must be a.c. coupled. The audio signal must be fed to both this
pin and the Level In pin.
No internal connection.
7
8
7
VSS: Signal ground (GND).
9
8
No internal connection.
No internal connection.
10
11
9
IRQ: This Interrupt Request output from the MX613 is ‘wire-OR able’ allowing the
interrupt outputs of other peripherals to be combined and connected to the Interrupt input
of a µProcessor. This input has a low-impedance pulldown to VSS when active and a highimpedance when inactive. An interrupt is produced on completion of a HI or LO frequency
measurement.
12
10
Serial Clock: The serial clock from the µProcessor. Data Out is clocked into the
µProcessor on the rising edge of the Serial Clock. See Data-Read Timing diagram.
13
11
Chip Select: A logic “0” at this input will select this device.
14
12
Data Out: The serial data output. Under the control of the Chip Select and Serial Clock
inputs, data should be read from this output in 6-bit blocks MSB (Bit-5) first.
If 8 serial clock pulses are applied, two additional logic “0s” will be output after Bit-0.
15
13
No internal connection.
16
14
VDD: Positive supply input. A single, stable supply is required. Levels and voltages within
the MX613 are dependent upon this supply. This pin should be decoupled to VSS by a
capacitor located close to the MX613 pins.
© 1997 MX•COM Inc.
www.mxcom.com Tele: 800 638-5577 910 744-5050 Fax: 910 744-5054
Doc. # 20480086.003
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USAAll trademarks and service marks are held by their respective companies
Global Call Progress Tone Detector
3
MX613
Preliminary Information
Application Information
VDD
VDD
1
R2
X1
XTAL/CLOCK
C5
2
XTAL
C6
VBIAS
C2
AUDIO SIGNAL
LEVEL IN
SIGNAL IN
C1
C3
VSS
1
16
2
15
3
14
4
13
5
MX613DW
VDD
R1
C4
DATA OUT
CHIP SELECT
SERIAL CLOCK INPUT
12
6
11
7
10
8
9
IRQ
Notes
(1) The Xtal/Clock input may be driven from the host telephone
system's 3.579545MHz clock; if a Xtal drive is required, the
configuration shown in the INSET is recommended.
Component
Value
R1
R2
C1
C2
C3
C4
C5
C6
X1
22.0kΩ
1.0MΩ
0.01µF
0.1µF
1.0µF
1.0µF
33.0pF
33.0pF
3.579545MHz
(2) The audio signal should be input to both Signal In and Level In
pins via separate coupling capacitors. If it is wished to operate
the device with disregard to on-chip level thresholds and
permanently enable the MX613, the Level In pin should be held
at
V DD.
To disable the MX613 the Level In pin should be held at VSS.
Level thresholds are preset internally.
Tolerances: C = ± 20% R = ± 10%
Figure 2 - External Component Connections
VDD
775mVrms
0
Level (dB)
-10
Low Band
(LO)
-20
High Band
(HI)
Must
Decode
-30
-40
Must-Not
Decode
-50
0
200
400
600
800
1000
1200
1400
1600
1800
2000
2200
Frequency (Hz)
Figure 3
-
HI/LO Decode Bands
© 1997 MX•COM Inc.
www.mxcom.com Tele: 800 638-5577 910 744-5050 Fax: 910 744-5054
Doc. # 20480086.003
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USAAll trademarks and service marks are held by their respective companies
Global Call Progress Tone Detector
4
MX613
Preliminary Information
Application Information ......
Principles of Decoder Operation
Level Detection
Because level and frequency discrimination operations take place in parallel, the audio signal should, under normal
circumstances, be input to both Signal In and Level In pins via coupling capacitors.
If the input signal level (Level In) is outside the preset ‘Must/Must Not Decode’ thresholds (see Specifications), the
Universal Call Progress Decoder will be disabled.
If it is wished to disregard signal input levels at the Level In pin and attempt to decode under all conditions, the decoder
may be permanently enabled by holding the Level In pin at VDD.
The MX613 can disabled by pulling Level In to V SS.
NOTONE Recognition
The NOTONE condition can be recognized using µProcessor software timing as below.
a. Set the µP timer period to a period greater than the relevant frequency-band measurement period (13.16ms
or 39.47ms).
b. Each ‘Tone Measurement Complete’ interrupt from the MX613 must reset the µP timer.
c. With NOTONE or white noise at the decoder input, the MX613 on-chip timer will be continually reset.
i. ‘Tone Measurement Complete' interrupt will not occur - the µP timer will run.
ii. The µP Timer time-out can be considered as a NOTONE indication.
Level In
Timer
IRQ
In Limits
Running
Enabled
Enabled
Reset
Disabled
Disabled
(frozen to previous bit-5 level
VDD
Running/Reset
Enabled/Disabled
Enabled
(dependent upon Quality measurement)
VSS
Reset
Disabled
Disabled
(frozen to previous bit-5 level)
Out of Limits
Data Out
Frequency Band Discrimination
The input signal is amplified by a self-biased (zero-crossing) inverting amplifier and then ‘filtered’ to remove highfrequency noise and jitter.
High (HI) and Low (LO) counters are employed to determine the input frequency band (HI = 900Hz to 2150Hz,
LO = 300Hz to 660Hz).
If the input frequency is in the LO Band, the device will operate as a LO Band decoder and will remain so until a
HI frequency signal is detected. If the input frequency is in the HI Band, the device will operate as a HI Band
decoder and will remain so until a LO frequency signal is detected.
Frequency band monitoring is continuous with the band selection taking place every 9.8ms. It will therefore take
9.8ms from Power-Up to set up the initial correct decode frequency band.
On-Chip Timer Operation
For frequency measurement, the MX613 counts the number of input cycles in a fixed time period. This fixed
period, measured by the continuous on-chip timer, is set to 13.16ms for HI Band inputs and 39.47ms for LO Band
inputs.
When the timer expires the following actions take place:
a. A HI or LO (“1” or “0”) band indication bit is latched into Bit-5 of the Serial Output Port.
b. The Frequency Counter count of 5-bits is latched into the Serial Output Port (Bit-4 [MSB] to Bit-0). The
Serial Output Port Contains 6-bits, if 8 Serial Clock edges are employed, two extra “0s”, which should be
ignored, will be output last.
c. An interrupt is generated (IRQ) to the µProcessor. The contents of the Serial Output Port should be read
before the next interrupt is expected; if not data will be overwritten.
When the Chip Select input is set to “0” the interrupt is reset.
The On-Chip Timer and Frequency Counter will be reset in mid-count, and therefore unable to allow a valid
measurement, under the following conditions:
a. A change of decode frequency band.
b. Decoder disabled; signal input level out of specification or Level Detect input set to VSS.
c. Signal Quality Assessment considered ‘Bad’.
d. Input signal frequency outside limits.
© 1997 MX•COM Inc.
www.mxcom.com Tele: 800 638-5577 910 744-5050 Fax: 910 744-5054
Doc. # 20480086.003
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USAAll trademarks and service marks are held by their respective companies
Global Call Progress Tone Detector
5
MX613
Preliminary Information
Application Information ......
N = int (Frequency x Measurement Period)
Measurement Period
= 39.47ms for Low Band
(300Hz to 660Hz)
= 13.16ms for High Band
(900Hz to 2150Hz)
Note: For input frequencies of between 661Hz and 899Hz the MX613 will give no reliable output.
When a ‘correct’ decode has been allowed and an interrupt generated, a 6-bit data word is presented at the Serial Output
Port. This 6-bit word indicates the input frequency's band (Bit 5) and value ‘N’ as indicated below.
Bit 5
Output
First
Band Bit (5)
MSB (4)
HI-“1”/LO-“0”
(3)
(2)
(1)
Bits
0 to 4
=N
LSB (0)
Bits 0 to 4 represent the measured frequency in the selected band
When a ‘correct’ decode has been allowed and an interrupt generated, a 6-bit data word will be presented at the Serial
Output Port. This 6-bit word indicates the input frequency's band and value as described below.
As an example, the following binary-word presented at the Serial Output Port (1 1 0 1 1 0) will indicate a frequency
in the HI Band of between 1680Hz and 1740Hz (Bit-5 = “1” = HI, ‘N’ = 22).
LO Band
HI Band
N
B5
280
285
290
295
300
305
310
315
320
325
330
335
340
345
350
355
360
840
855
870
885
900
915
930
945
960
975
990
1005
1020
1035
1050
1065
1080
365
11
11
11
11
11
12
12
12
12
12
13
13
13
13
13
14
14
1095
H/L
0
1
0
1
1
H/L
0
1
1
0
0
1110
1125
1140
1155
1170
1185
1200
1215
1230
1245
1260
1275
1290
1305
1320
1335
1350
1365
1380
1395
1410
1425
1440
1455
1470
1485
1500
14
14
14
15
15
15
15
15
16
16
16
16
16
17
17
17
17
17
18
18
18
18
18
19
19
19
19
370
375
380
385
390
395
400
405
410
415
420
425
430
435
440
445
450
455
460
465
470
475
480
485
490
495
500
H/L
H/L
B4 B3 B2 B1 B0
0
0
1
1
1
1
0
1
1
0
LO Band
HI Band
N
505
510
515
520
525
530
535
540
545
550
555
560
565
570
575
580
585
1515
1530
1545
1560
1575
1590
1605
1620
1635
1650
1665
1680
1695
1710
1725
1740
1755
590
19
20
20
20
20
20
21
21
21
21
21
22
22
22
22
22
23
1770
595
600
605
610
615
620
625
630
635
640
645
650
655
660
665
670
675
680
685
690
695
700
705
710
715
720
725
1785
1800
1815
1830
1845
1860
1875
1890
1905
1920
1935
1950
1965
1980
1995
2010
2025
2040
2055
2070
2085
2100
2115
2130
2145
2160
2175
23
23
23
24
24
24
24
24
25
25
25
25
25
26
26
26
26
26
27
27
27
27
27
28
28
28
28
14
H/L
0
1
1
1
1
H/L
1
0
0
0
0
H/L
1
0
0
0
1
H/L
1
0
0
1
0
H/L
1
0
0
1
1
B5 B4 B3 B2 B1 B0
H/L
H/L
1
1
0
0
0
1
1
0
1
0
H/L
1
0
1
0
1
H/L
1
0
1
1
0
H/L
23
1
0
1
1
1
H/L
1
1
0
0
0
H/L
1
1
0
0
1
H/L
1
1
0
1
0
H/L
1
1
0
1
1
H/L
1
1
1
0
0
Table 1 - Decode Frequency Data
© 1997 MX•COM Inc.
www.mxcom.com Tele: 800 638-5577 910 744-5050 Fax: 910 744-5054
Doc. # 20480086.003
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USAAll trademarks and service marks are held by their respective companies
Global Call Progress Tone Detector
6
MX613
Preliminary Information
Application Information ......
Decoder Timing
CHIP SELECT
tCSE
tCYC
tCSH
SERIAL CLOCK
tPWL
tDE
tPWH
tCDS
tDH
tHIZ
DATA OUT
BIT 5
TRI-STATE
BIT 0
BIT 4
tIR
IRQ
Figure 4 - Data-Read Timing
Decoder Timing Characteristics
With reference to Figure 4, Data-Read Timing.
Characteristics
Min.
Typ.
Max.
Unit
tPWH
Serial Clock “High” Pulse Width
250
-
-
ns
tPWL
Serial Clock “Low” Pulse Width
250
-
-
ns
tCYC
Serial Clock-Cycle Time
600
-
-
ns
tCSE
Chip Select Low to Clock “High” Edge
450
-
-
ns
tCSH
Last Clock “High” Edge to CS “High”
600
-
-
ns
tDH
Data Out Hold Time
0
-
-
ns
tCDS
Clock Edge to Data Out Set Time
-
-
200
ns
tIR
Interrupt (IRQ) Reset Time
-
-
200
ns
tDE
Chip Select “Low” to Data Enable
-
-
200
ns
tHIZ
Chip Select “High” to Output Tri-State
-
-
1000
ns
Notes
1 Data is output bit 5 first. Bit 5 can be clocked into the µProcessor by the first Serial Clock rising edge.
If 8 Serial Clock pulses are employed the last 2 data-bits will be “0” and should be ignored by the software.
2 Chip Select should be used to react to Interrupts and then returned to a logic “1”.
If Chip Select stays low there will be no further Interrupts and no Data Output update.
© 1997 MX•COM Inc.
www.mxcom.com Tele: 800 638-5577 910 744-5050 Fax: 910 744-5054
Doc. # 20480086.003
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USAAll trademarks and service marks are held by their respective companies
Global Call Progress Tone Detector
7
MX613
Preliminary Information
Specifications
Absolute Maximum Ratings
Operating Limits
Exceeding the maximum rating can result in device
damage. Operation of the device outside the operating
limits is not suggested.
All devices were measured under the following
conditions unless otherwise noted.
Supply Voltage
Input Voltage at any pin
(ref VSS=0V)
Sink/Source Current
(supply pins)
(other pins)
Total Device Dissipation
(@ TAMB=25°C)
Derating
Operating Temperature
Storage Temperature
-0.3 to 7.0V
VDD = 3.3V
-0.3 to (VDD+ 0.3V)
TOP = 25°C
± 30mA
±20mA
Audio Level 0dB ref = 775 mVrms
Xtal/Clock f0 = 3.579545 MHz
800mW max.
10 mW/°C
-40°C to +85°C
-55°C to +125°C
Characteristics
See Note
Min.
Typ.
Max.
Unit
3.0
-
5.5
V
-
0.3
1.0
mA
Input Logic “1”
70.0
-
100
% VDD
Input Logic “0”
0
-
30.0
% VDD
Static Values
Supply Voltage (VDD) at 25°C
Supply Current
Output Logic “1”
1
90.0
-
100
% VDD
Output Logic “0”
1
-
-
10.0
% VDD
10.0
-
-
MΩ
Signal Input
-
50.0
-
kΩ
Level Input
-
210
-
kΩ
IRQ Output (Logic “0”)
-
-
500
Ω
Data Output (Logic “0”)
-
500
-
Ω
(Logic “1”)
-
-
2.5
kΩ
10.0
-
-
MΩ
-
230
825
kΩ
25.0
42.0
-
V/V
5.0
11.0
-
MHz
-25.2
-
-
dB
Impedances
Chip Select and Serial Clock Input
Dynamic Values
On-Chip Xtal Oscillator
RIN
ROUT
DC Voltage Gain
Bandwidth at Unity Gain
Single Tone Operation
Must-Decode Input Level
2
© 1997 MX•COM Inc.
www.mxcom.com Tele: 800 638-5577 910 744-5050 Fax: 910 744-5054
Doc. # 20480086.003
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USAAll trademarks and service marks are held by their respective companies
Global Call Progress Tone Detector
Characteristics
8
MX613
Preliminary Information
See Note
Min.
Typ.
Max.
Unit
2
-
-
-46.0
dB
LO Band Frequency Range
4
300
660
Hz
HI Band Frequency Range
4
900
2150
Hz
Must-Not Decode Input Level
Frequency Resolution (Table 1)
LO Band
-
-
25.0
Hz
HI Band
-
-
75.0
Hz
-
18.0
-
dB
Input Signal/White-Noise Ratio (HI & LO Bands)
Interrupt Rate
(LO Band)
3
19.0
-
-
/sec
(HI Band)
3
57.0
-
-
/sec
6
-
1.0
-
/2 secs
5
-
-
10.0
%
False Decodes Due to Noise
Outband modulation level limits
for correct decode (fIN = 340Hz to 620Hz)
Notes
1.
Into a high-impedance load (>1.0MΩ).
2.
Must decode signal above -25.2dB; Must Not decode signal below -46.0dB.
If a supply other than 3.3 volts is used, levels will change pro-rata.
3.
Under ‘Pure Tone’ input conditions.
4.
For input frequencies of between 661Hz and 899Hz the MX613 will provide no reliable output.
5.
With an amplitude modulating frequency of between 16.0Hz and 100Hz.
6.
Test noise input = 5.0kHz at 100mVrms
Package Tolerances
A
Z
ALTERNATIVE
PIN
LOCATION
MARKING
B
E
W
L
T
PIN 1
X
Y
C
H
J
P
K
DIM.
A
B
C
E
H
J
K
L
P
T
W
X
Y
Z
MIN.
TYP.
MAX.
0.395 (10.03)
0.413 (10.49)
0.286 (7.26)
0.299 (7.59)
0.093 (2.36)
0.105 (2.67)
0.390 (9.90)
0.419 (10.64)
0.003 (0.08)
0.020 (0.51)
0.013 (0.33)
0.020 (0.51)
0.041 (1.04)
0.050 (1.27)
0.016 (0.41)
0.050 (1.27)
0.009 (0.23)
0.0125 (0.32)
45°
0°
10°
7°
5°
5°
NOTE : All dimensions in inches (mm.)
Angles are in degrees
Figure 5: 16-pin SOIC Mechanical Outline: order as part no. MX613DW
© 1997 MX•COM Inc.
www.mxcom.com Tele: 800 638-5577 910 744-5050 Fax: 910 744-5054
Doc. # 20480086.003
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USAAll trademarks and service marks are held by their respective companies
Global Call Progress Tone Detector
9
MX613
Package Tolerances
A
B
E1
E
Y
T
PIN 1
K
C
H
L
J
J1
Preliminary Information
P
DIM.
A
B
C
E
E1
H
J
J1
K
L
P
T
Y
MIN.
TYP.
MAX.
0.810 (20.57)
0.740 (18.80)
0.262 (6.63)
0.240 (6.10)
0.200 (5.06)
0.135 (3.43)
0.390 (9.91).
0.300 (7.62)
0.290 (7.37)
0.325 (8.26)
0.015 (0.38)
0.070 (1.77)
0.014 (0.35)
0.023 (0.58)
0.040 (1.02)
0.065 (1.65)
0.056 (1.42)
0.064 (1.63)
0.150 (3.81)
0.121 (3.07)
0.100 (2.54)
0.008 (0.20)
0.015 (0.38)
7°
NOTE : All dimensions in inches (mm.)
Angles are in degrees
Figure 6: 16-pin PDIP Mechanical Outline: order as part no. MX613P
© 1997 MX•COM Inc.
www.mxcom.com Tele: 800 638-5577 910 744-5050 Fax: 910 744-5054
Doc. # 20480086.003
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USAAll trademarks and service marks are held by their respective companies
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
Microcircuits.
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.
CML Microcircuits (USA) [formerly MX-COM, Inc.] Product Textual Marking
On CML Microcircuits (USA) products, the ‘MX-COM’ textual logo is being replaced by a ‘CML’
textual logo.
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
[email protected]
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
[email protected]
www.cmlmicro.com
No 2 Kallang Pudding Road, 09-05/
06 Mactech Industrial Building,
Singapore 349307
Tel: +65 7450426
Fax: +65 7452917
[email protected]
www.cmlmicro.com
D/CML (D)/2 May 2002