TC670_03 [MICROCHIP]
Tiny Predictive Fan Failure Detector; 微小的预测风扇故障检测
| 型号： | TC670_03 |
| 厂家： | 
MICROCHIP |
| 描述： | Tiny Predictive Fan Failure Detector |
| 文件： | 总14页 (文件大小：343K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TC670
M
Tiny Predictive Fan Failure Detector
Features
General Description
• Fan Wear-Out Detection for 2-Wire
The TC670 is an integrated fan speed sensor that
predicts and/or detects fan failure, preventing thermal
damage to systems with cooling fans. When the fan
speed falls below a user-specified level, the TC670
asserts an ALERT signal. With this design, a critical
minimum fan speed is determined by the user. The fan
alert level is then set with a resistor divider on the
THRESHOLD pin (Pin 1) of the TC670. When the
minimum fan speed is reached, the ALERT pin (Pin 5)
changes from a digital high to low. This failure detection
works with all linear-controlled 2-wire fans. The TC670
eliminates the need for 3-wire fan solutions.
Linear-Controlled Fans
• Replacement System for 3-Wire Fans
• Fan Alert Signal when Fan Speed is below
Programmed Threshold
• CLEAR Capability for Eliminating False Alarm
• Low Operating Current, 90 µA (typ.)
• V Range 3.0V to 5.5V
DD
• Available in a 6-Pin SOT-23 Package
Applications
A CLEAR option can be used to reset the ALERT sig-
nal, allowing the flexibility of connecting the ALERT
output of the TC670 with other ALERT/FAULT inter-
rupts in the system. This feature can be implemented
so that false fan fault conditions do not initiate system
shutdown.
The TC670 is specified to operate over the full
industrial temperature range of -40°C to +85°C. The
TC670 is offered in a 6-pin SOT-23 pin package and
consumes 90 µA (typ.) during operation. The space-
saving package and low power consumption make this
device an ideal choice for systems requiring fan speed
monitoring.
• Protection for Linear-Controlled Fans
• Power Supplies
• Industrial Equipment
• PCs and Notebooks
• Data Storage
• Data Communications Equipment
• Instrumentation
Package Type
SOT-23A-6
THRESHOLD
1
2
3
SENSE
ALERT
6
5
4
Typical Application Circuit
+5V
GND
CLEAR
V
DD
ALERT
LED
4
VDD
R4
0.1 µF
+12V
CLEAR
3
5
6
ALERT
From
R3
Microcontroller
DC
FAN
1
CSENSE
THRESHOLD
SENSE
R2
RSENSE
GND
2
2003 Microchip Technology Inc.
DS21688C-page 1
TC670
TABLE 1-1:
Symbol
THRESHOLD Analog Input
PIN FUNCTION TABLE
Description
1.0
ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings†
GND
CLEAR
VDD
ALERT
SENSE
Ground Terminal
Digital Input
Bias Supply Input
Digital (Open-Drain) Output
Analog Input
VDD...................................................................................6.0V
All Inputs and Outputs. ............(GND − 0.3V) to (VDD + 0.3V)
Output Short-Circuit Current .................................continuous
Current at Input Pin ................................................... +/-2 mA
Current at Output Pin .............................................. +/-25 mA
Junction Temperature, TJ .............................................150°C
ESD protection on all pins..................................................≥ 4 kV
Operating Temperature Range........................-40°C to +85°C
Storage Temperature Range.........................-55°C to +150°C
† Notice: Stresses above those listed under "Maximum
Ratings" may cause permanent damage to the device. This is
a stress rating only and functional operation of the device at
those or any other conditions above those indicated in the
operation listings of this specification is not implied. Exposure
to maximum rating conditions for extended periods may affect
device reliability.
DC CHARACTERISTICS
Electrical Specifications: Unless otherwise specified, all limits are specified at +25°C, V = 3.0V to 5.5V,
DD
CLEAR = Low. Boldface type specifications apply for temperature range of -40°C to +85°C.
Parameters
Sym
Min
Typ
Max
Units
Conditions
Power Supply
Supply Voltage
Supply Current
V
I
3.0
—
—
90
5.5
150
V
µA
DD
DD
CLEAR Input
Logic Input High Level
Logic Input Low Level
SENSE Input
V
V
0.8V
—
—
—
—
0.2V
DD
V
V
IH
DD
IL
Input Level Threshold Voltage
Input Resistance
V
—
—
124
50
—
—
mV
kΩ
TH(SENSE)
R
SENSE
THRESHOLD Input
Input Voltage Minimum
Input Voltage Maximum
Input Resistance
—
—
—
0.0
2.4
100
—
—
—
—
V
V
MΩ
%
Programmed Fan Speed Alert Accuracy ALERT
-10
+10
V
= 3.0V
DD
ACC
(Note 1)
ALERT Output
Output Low Voltage
Output Delay Time
V
—
—
—
176
0.3
—
V
ms
I
= 2.5 mA
SINK
LOW
t
DELAY
Temperature Ranges
Specified Temperature Range
Operating Temperature Range
Thermal Package Resistances
Thermal Resistance, 6L-SOT-23
T
-40
-40
—
—
+85
+125
°C
°C
A
T
A
θ
—
230
—
°C/W
JA
Note 1: The TC670 will operate properly over the entire power supply range of 3.0V to 5.5V. As V
varies from
DD
3.0V, accuracy will degrade based on the percentage of V , as shown in Section 2.0, “Typical
DD
Performance Curves”.
DS21688C-page 2
2003 Microchip Technology Inc.
TC670
2.0
TYPICAL PERFORMANCE CURVES
Note: The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
Note: Unless otherwise indicated, all limits are specified at +25°C, V = 3.0V to 5.5V, CLEAR = Low.
DD
115
160
110
105
+90°C
140
120
100
80
V
= 3.0V
DD
100
95
90
85
80
75
70
+25°C
-45°C
60
40
V
= 5.5V
4
DD
20
0
0.5
1
1.5
2
2.5
3
3.5
4.5
3.0
3.3
3.6
3.9
4.2
4.5
4.8
5.1
5.4
5.7
6.0
2.7
ALERT I
SINK
(mA)
Supply Voltage (V)
FIGURE 2-1:
Supply Current vs. Supply
FIGURE 2-4:
SINK
ALERT V
vs. ALERT
LOW
Voltage.
I
.
15000
14000
13000
12000
11000
10000
9000
8000
7000
6000
5000
4000
3000
2000
1000
0
13000
12000
11000
10000
9000
8000
7000
6000
5000
4000
3000
T
= -40˚C
A
V
= 3.0V
DD
T
= +25˚C
= +90˚C
A
V
= 2.7V
DD
T
A
V
= 3.3V
DD
V
= 3.0V
DD
-10.0 -8.0 -6.0 -4.0 -2.0 0.0 2.0 4.0 6.0 8.0 10.0
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.25
2.50
ALERT (%)
ACC
THRESHOLD Voltage (V)
FIGURE 2-2:
Fan Speed vs. Threshold
FIGURE 2-5:
Fan Speed vs. ALERT
.
ACC
Voltage.
15000
14000
13000
12000
11000
10000
9000
8000
7000
6000
5000
4000
3000
2000
1000
0
V
= 3.6V
DD
177
176
175
174
173
172
171
170
169
V
= 5.5V
DD
V
= 5.0V
DD
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.25
2.50
168
2.5
THRESHOLD Voltage (V)
3.0
3.5
4.0
4.5
5.0
Power Supply Voltage (V
)
DD
FIGURE 2-3:
Fan Speed vs. Threshold
Voltage.
FIGURE 2-6:
ALERT Output Delay vs.
Power Supply Voltage.
2003 Microchip Technology Inc.
DS21688C-page 3
TC670
Note: Unless otherwise indicated, all limits are specified at +25°C, V = 3.0V to 5.5V, CLEAR = Low.
DD
FIGURE 2-7:
CLEAR pin high to ALERT
pin high Timing Diagram.
DS21688C-page 4
2003 Microchip Technology Inc.
TC670
3.3
Digital Input (CLEAR)
3.0
PIN DESCRIPTIONS
The CLEAR input is used to reset or blank the ALERT
output. When the CLEAR input is driven high, the
ALERT output will be high-impedance (the ALERT
output requires a pull-up resistor).
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1:
PIN FUNCTION TABLE
Description
THRESHOLD Analog Input
Pin
Symbol
No.
3.4
Bias Supply Input (V
)
DD
1
2
3
4
5
6
Bias Supply Input, 3.0V to 5.5V. The bias supply input
should be bypassed to ground with a 0.1 µF ceramic
capacitor.
GND
CLEAR
VDD
Ground Terminal
Digital Input
Bias Supply Input
Digital (Open-Drain) Output
Analog Input
3.5
Digital (Open-Drain) Output
(ALERT)
ALERT
SENSE
The ALERT output is an open-drain output that
requires an external pull-up resistor. The ALERT output
is pulled low when the sensed fan speed (detected by
the pulses occurring at the SENSE input) falls below
the speed that is represented by the voltage at the
THRESHOLD pin. The ALERT output is latched in this
state until power is cycled or the CLEAR input is
toggled.
3.1
Analog Input (THRESHOLD)
The voltage set at the THRESHOLD input represents
the fan speed at which the TC670 will signal a fan
speed warning by pulling the ALERT output low. The
threshold voltage to fan speed correlation can be seen
in Figures 2-2 and 2-3.
3.2
Ground (GND)
3.6
Analog Input (SENSE)
The GND pin (Pin 2) of the TC670 should be connected
directly to the analog ground plane of the circuit board.
Care should be taken to keep this pin away from
switching signals, such as the fan excitation signals in
order to avoid false signals on the SENSE pin.
Voltage pulses, which are generated by the fan current
flowing through a sense resistor, are detected at the
SENSE pin and used to calculate the fan speed.
2003 Microchip Technology Inc.
DS21688C-page 5
TC670
4.0
DETAILED DESCRIPTION
+5V
The TC670 is an integrated fan speed sensor that
predicts/detects fan failure, consequently preventing
thermal damage to systems with cooling fans. When
the fan speed falls below a user-programmed threshold
level, the TC670 asserts an ALERT signal. This
threshold is set with an external resistor divider
network.
ALERT
LED
4
VDD
R4
0.1 µF
3
+12V
CLEAR
5
6
ALERT
VDD
R3
CLEAR
DC
FAN
1
CSENSE
THRESHOLD
SENSE
ALERT
Logic
THRESHOLD
GND
R2
RSENSE
GND
2
50 kΩ
Frequency-to-
Voltage
SENSE
Note: This typical application circuit uses a LED to
124 mV
Bandgap
Oscillator
indicate that a fan failure has occurred.
FIGURE 4-2:
Typical Application Circuit.
FIGURE 4-1:
TC670 Block Diagram.
4.1 SENSE Input
As shown in Figure 4-1, the TC670 senses the fan
pulses and internally converts those pulses from a
frequency into an analog voltage. This voltage is then
compared with the DC voltage at the THRESHOLD pin.
If the converted frequency-to-voltage value from the
fan's pulses falls below the threshold voltage, the
ALERT output is pulled low.
In a 3.0V system, the external fan alert level on the
THRESHOLD pin can be designed from 0.0V (stalled
fan) to 2.4V (for 13,000 RPM) to cover most of the com-
mon fan speeds. This failure detection system works
with linear-controlled 2-wire fans and eliminates the
need for 3-wire fans. The TC670 can also work with
3-wire fans either by using the SENSE circuit or by
directly sensing the RPM output from the 3rd wire.
As shown in Figure 4-2, the SENSE input (Pin 6) is
connected to the sense resistor (R ) through a
SENSE
capacitor (C
). The low value current sensing
SENSE
SENSE
resistor (R
) is connected between the ground
return leg of the fan and the fan bias ground. During
normal fan operation, commutation occurs as each
pole of the fan is energized. This causes the fan current
to be an AC waveform with fast falling edges.
These short, rapid changes in fan current cause a
corresponding dV/dt voltage across the sense resistor,
as well as a corresponding dI/dt current through the
sense capacitor. The current through C
is termi-
SENSE
nated with the internal 50 kΩ input resistance at the
SENSE pin of the TC670. When positive-going fan
pulses at the SENSE input are greater than 124 mV
(typ.), the TC670 latches-in those voltage spikes. This
124 mV (typ.) SENSE input built-in threshold reduces
false triggering errors caused by extraneous noise
pulses associated with a running fan. The presence
and frequency of these pulses is a direct indication of
fan operation and fan speed.
A CLEAR pin is provided to allow the user to reset the
ALERT pin status back to a high state. This clear option
also allows the flexibility of connecting the ALERT out-
put of the TC670 with other alert/fault interrupts in the
system without having a risk of a system shutdown due
to false fan fault condition.
DS21688C-page 6
2003 Microchip Technology Inc.
TC670
The design of the proper input SENSE circuitry is a
4.2.1
THRESHOLD CALIBRATION USING
FAN’S FULL SCALE SPEED
matter of scaling R
to provide the necessary
SENSE
amount of gain and proper selection of the sensing
capacitor. The following table (Table 4-1) lists some
The fan should first be run at full speed. At full speed,
the threshold voltage level should be adjusted until the
ALERT output is asserted. With this full-scale value of
the threshold voltage, the value can be scaled down to
the fan fault speed as a percentage of the full speed.
For example, if the fan full speed threshold voltage is
1.5V, then the fan fault threshold voltage at 30% of full
speed would be 30% x 1.5V = 0.45V.
recommended values for R
according to the
SENSE
nominal operating current of the fan. Please note that
the current draw specified by the fan manufacturer may
be a worst-case rating and not the fan’s nominal oper-
ating current. If the fan current falls between two of the
values listed, it is recommended that the higher value
resistor is used.
4.2.2
THRESHOLD CALIBRATION USING
FAN’S MINIMUM ALLOWABLE
SPEED ESTIMATE
TABLE 4-1:
RECOMMENDED VALUES
FOR R PER FIGURE 4-2
SENSE
Nominal Fan Current
R
(Ω)
SENSE
For a more exact fan fault trip point, the user can run
the fan at its minimum allowed speed. At this speed,
the threshold voltage can be adjusted until the ALERT
output is asserted.
(mA)
100
200
300
400
500
600
4.7
2.4
1.8
1.3
1.0
0.8
4.3
CLEAR Input
The CLEAR input allows the user to reset the ALERT
pin to a high status. This is an active-high input.
Consequently, as long as CLEAR is high, ALERT will
always be high as well. To allow ALERT to operate cor-
rectly, CLEAR must be held low. This feature can be
implemented so that false fan fault conditions do not
initiate system shutdown.
A 0.1 µF ceramic capacitor is recommended for
C
. Smaller capacitor values will require larger
SENSE
sense resistors, whereas larger capacitors are more
expensive and occupy more board space.
4.2
THRESHOLD Input
4.4
ALERT Output
The voltage at the THRESHOLD input sets the
equivalent minimum allowable fan speed for the appli-
cation. As shown in Section 2.0, “Typical Performance
Curves”, the relationship between the threshold volt-
age and minimum fan speed is also power supply and
temperature dependant.
All the values for the threshold voltage that are shown
in these graphs represent typical numbers and might
not be optimized for all fans in all applications. To
ensure accurate fan speed monitoring of a specific fan
in a specific application, the user must perform a one-
time correlation check with the prototype.
There are two techniques that can be used to calibrate
the system. One approach is to find the fan’s full-scale
capability and mathematically estimate the minimum
acceptable speed of the fan. A second technique is to
identify the fan’s minimum speed and calibrate the
threshold voltage accordingly.
The ALERT output is an open-drain output capable of
sinking 2.5 mA (typ). The ALERT output is asserted
whenever the detected fan speed equals or falls below
the equivalent voltage set at the threshold pin. The
ALERT output is only deactivated once the CLEAR pin
is brought to a high state. Although the absolute
maximum sink current of this pin is 25 mA, it is
recommended that the current sinking into the ALERT
output does not exceed 20 mA.
4.5
Power Supply Input (V
)
DD
To assure proper operation of the TC670 in a noisy
environment where the fans are running, the V
pin
DD
(Pin 4) must be decoupled with a 0.1 µF capacitor, as
shown in Figure 4-1. This capacitor should be located
as close to the TC670 V pin as possible, as well as
DD
being promptly terminated to the ground plane. A
ceramic capacitor is recommended.
4.6
Ground Terminal (GND)
The GND pin (Pin 2) of the TC670 should be connected
directly to the analog ground plane of the circuit board.
Care should be taken to keep this pin away from
switching signals, such as the fan excitation signals in
order to avoid false signals on the SENSE pin.
2003 Microchip Technology Inc.
DS21688C-page 7
TC670
5.0
PACKAGE INFORMATION
5.1
Package Marking Information
6-Pin SOT-23A (EIAJ SC-74) Device
6
5
4
cdef
1
2
3
1 & 2 = part number code
Part Number
TC670ECH
Code
DA
3 = year and quarter code
4 = lot ID number
5.2
Taping Form
Component Taping Orientation for 6-Pin SOT-23A (EIAJ SC-74) Devices
User Direction of Feed
Device
Marking
W
P
PIN 1
Carrier Tape, Number of Components Per Reel and Reel Size:
Package
6-Pin SOT-23A
Carrier Width (W)
Pitch (P)
Part Per Full Reel
Reel Size
8 mm
4 mm
3000
7 in.
DS21688C-page 8
2003 Microchip Technology Inc.
TC670
5.3
Package Dimensions (6-Pin SOT-23)
E
E1
B
p1
D
n
1
α
c
A
A2
φ
L
A1
β
Units
INCHES*
NOM
MILLIMETERS
NOM
Dimension Limits
MIN
MAX
MIN
MAX
n
p
Number of Pins
Pitch
6
6
.038
0.95
1.90
1.18
1.10
0.08
2.80
1.63
2.95
0.45
p1
Outside lead pitch (basic)
Overall Height
.075
.046
.043
.003
.110
.064
.116
.018
A
A2
A1
E
.035
.057
0.90
1.45
1.30
0.15
3.00
1.75
3.10
0.55
10
Molded Package Thickness
Standoff
.035
.000
.102
.059
.110
.014
.051
.006
.118
.069
.122
.022
10
0.90
0.00
2.60
1.50
2.80
0.35
Overall Width
Molded Package Width
Overall Length
E1
D
Foot Length
L
φ
Foot Angle
0
5
0
5
c
Lead Thickness
Lead Width
.004
.014
.006
.017
.008
.020
10
0.09
0.35
0.15
0.43
0.20
0.50
10
B
Mold Draft Angle Top
Mold Draft Angle Bottom
0
5
0
5
α
β
0
5
10
0
5
10
*Controlling Parameter
Notes:
Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not
exceed .005" (0.127mm) per side.
JEITA (formerly EIAJ) equivalent: SC-74A
Drawing No. C04-120
2003 Microchip Technology Inc.
DS21688C-page 9
TC670
NOTES:
DS21688C-page 10
2003 Microchip Technology Inc.
TC670
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.
PART NO.
Device
X
XXXX
Examples:
a) TC670ECHTR: Predictive Fan Failure
Detector, SOT-23 package.
Temperature
Range
Package
Device:
TC670:
Predictive Fan Failure Detector
Temperature Range:
Package:
E
=
-40°C to +85°C
CHTR: = SOT-23, Small Outline Transistor, 6-lead
(Tape and Reel only)
Sales and Support
Data Sheets
Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recom-
mended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following:
1. Your local Microchip sales office
2. The Microchip Corporate Literature Center U.S. FAX: (480) 792-7277
3. The Microchip Worldwide Site (www.microchip.com)
Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using.
Customer Notification System
Register on our web site (www.microchip.com/cn) to receive the most current information on our products.
2003 Microchip Technology Inc.
DS21688C-page11
TC670
NOTES:
DS21688C-page 12
2003 Microchip Technology Inc.
Note the following details of the code protection feature on Microchip devices:
•
Microchip products meet the specification contained in their particular Microchip Data Sheet.
•
Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
•
There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip's Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
•
•
Microchip is willing to work with the customer who is concerned about the integrity of their code.
Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such
acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Information contained in this publication regarding device
applications and the like is intended through suggestion only
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications. No
representation or warranty is given and no liability is assumed
by Microchip Technology Incorporated with respect to the
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The Company’s quality system processes and
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2003 Microchip Technology Inc.
DS21688C - page 13
M
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Epping 2121, NSW
3-18-20, Shinyokohama
Kohoku-Ku, Yokohama-shi
Kanagawa, 222-0033, Japan
Tel: 81-45-471- 6166 Fax: 81-45-471-6122
Chandler, AZ 85224-6199
Tel: 480-792-7200 Fax: 480-792-7277
Technical Support: 480-792-7627
Web Address: http://www.microchip.com
Australia
Korea
Tel: 61-2-9868-6733 Fax: 61-2-9868-6755
Rocky Mountain
Microchip Technology Korea
168-1, Youngbo Bldg. 3 Floor
Samsung-Dong, Kangnam-Ku
Seoul, Korea 135-882
China - Beijing
2355 West Chandler Blvd.
Chandler, AZ 85224-6199
Tel: 480-792-7966 Fax: 480-792-4338
Microchip Technology Consulting (Shanghai)
Co., Ltd., Beijing Liaison Office
Unit 915
Tel: 82-2-554-7200 Fax: 82-2-558-5934
Atlanta
Bei Hai Wan Tai Bldg.
Singapore
3780 Mansell Road, Suite 130
Alpharetta, GA 30022
No. 6 Chaoyangmen Beidajie
Beijing, 100027, No. China
Tel: 86-10-85282100 Fax: 86-10-85282104
Microchip Technology Singapore Pte Ltd.
200 Middle Road
Tel: 770-640-0034 Fax: 770-640-0307
#07-02 Prime Centre
Boston
China - Chengdu
Singapore, 188980
2 Lan Drive, Suite 120
Westford, MA 01886
Tel: 978-692-3848 Fax: 978-692-3821
Microchip Technology Consulting (Shanghai)
Co., Ltd., Chengdu Liaison Office
Rm. 2401-2402, 24th Floor,
Tel: 65-6334-8870 Fax: 65-6334-8850
Taiwan
Microchip Technology (Barbados) Inc.,
Taiwan Branch
Ming Xing Financial Tower
Chicago
No. 88 TIDU Street
333 Pierce Road, Suite 180
Itasca, IL 60143
11F-3, No. 207
Chengdu 610016, China
Tung Hua North Road
Taipei, 105, Taiwan
Tel: 86-28-86766200 Fax: 86-28-86766599
Tel: 630-285-0071 Fax: 630-285-0075
China - Fuzhou
Tel: 886-2-2717-7175 Fax: 886-2-2545-0139
Dallas
Microchip Technology Consulting (Shanghai)
Co., Ltd., Fuzhou Liaison Office
Unit 28F, World Trade Plaza
4570 Westgrove Drive, Suite 160
Addison, TX 75001
EUROPE
Austria
Tel: 972-818-7423 Fax: 972-818-2924
No. 71 Wusi Road
Microchip Technology Austria GmbH
Durisolstrasse 2
Detroit
Fuzhou 350001, China
Tri-Atria Office Building
Tel: 86-591-7503506 Fax: 86-591-7503521
A-4600 Wels
32255 Northwestern Highway, Suite 190
Farmington Hills, MI 48334
Tel: 248-538-2250 Fax: 248-538-2260
China - Hong Kong SAR
Austria
Microchip Technology Hongkong Ltd.
Unit 901-6, Tower 2, Metroplaza
223 Hing Fong Road
Tel: 43-7242-2244-399
Fax: 43-7242-2244-393
Denmark
Kokomo
Kwai Fong, N.T., Hong Kong
2767 S. Albright Road
Kokomo, Indiana 46902
Tel: 765-864-8360 Fax: 765-864-8387
Microchip Technology Nordic ApS
Regus Business Centre
Lautrup hoj 1-3
Tel: 852-2401-1200 Fax: 852-2401-3431
China - Shanghai
Microchip Technology Consulting (Shanghai)
Co., Ltd.
Ballerup DK-2750 Denmark
Tel: 45 4420 9895 Fax: 45 4420 9910
Los Angeles
18201 Von Karman, Suite 1090
Irvine, CA 92612
Room 701, Bldg. B
France
Far East International Plaza
No. 317 Xian Xia Road
Microchip Technology SARL
Parc d’Activite du Moulin de Massy
43 Rue du Saule Trapu
Tel: 949-263-1888 Fax: 949-263-1338
San Jose
Shanghai, 200051
Microchip Technology Inc.
2107 North First Street, Suite 590
San Jose, CA 95131
Tel: 86-21-6275-5700 Fax: 86-21-6275-5060
Batiment A - ler Etage
China - Shenzhen
91300 Massy, France
Microchip Technology Consulting (Shanghai)
Co., Ltd., Shenzhen Liaison Office
Tel: 33-1-69-53-63-20 Fax: 33-1-69-30-90-79
Tel: 408-436-7950 Fax: 408-436-7955
Germany
Rm. 1812, 18/F, Building A, United Plaza
No. 5022 Binhe Road, Futian District
Shenzhen 518033, China
Toronto
Microchip Technology GmbH
Steinheilstrasse 10
6285 Northam Drive, Suite 108
Mississauga, Ontario L4V 1X5, Canada
Tel: 905-673-0699 Fax: 905-673-6509
D-85737 Ismaning, Germany
Tel: 49-089-627-144-100
Fax: 49-089-627-144-44
Tel: 86-755-82901380 Fax: 86-755-82966626
China - Qingdao
Rm. B505A, Fullhope Plaza,
Italy
No. 12 Hong Kong Central Rd.
Qingdao 266071, China
Microchip Technology SRL
Via Quasimodo, 12
20025 Legnano (MI)
Milan, Italy
Tel: 86-532-5027355 Fax: 86-532-5027205
India
Tel: 39-0331-742611 Fax: 39-0331-466781
Microchip Technology Inc.
India Liaison Office
United Kingdom
Marketing Support Division
Divyasree Chambers
Microchip Ltd.
505 Eskdale Road
1 Floor, Wing A (A3/A4)
No. 11, O’Shaugnessey Road
Bangalore, 560 025, India
Tel: 91-80-2290061 Fax: 91-80-2290062
Winnersh Triangle
Wokingham
Berkshire, England RG41 5TU
Tel: 44 118 921 5869 Fax: 44-118 921-5820
02/12/03
DS21688B-page 14
2003 Microchip Technology Inc.
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