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TC650AEVUA [MICROCHIP]

Tiny Integrated Temperature Sensor & Brushless DC Fan Controller with Over-Temperature Alert; 微型集成温度传感器和无刷直流风扇控制器具有超温报警
TC650AEVUA
型号： TC650AEVUA
厂家： MICROCHIP    MICROCHIP
描述：

Tiny Integrated Temperature Sensor & Brushless DC Fan Controller with Over-Temperature Alert
微型集成温度传感器和无刷直流风扇控制器具有超温报警

风扇 传感器 温度传感器 控制器
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中文：  中文翻译
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TC650/TC651  
Tiny Integrated Temperature Sensor & Brushless DC Fan  
Controller with Over-Temperature Alert  
Features  
Package Type  
• Integrated Temperature Sensing and Multi-speed  
Fan Control  
8-Pin MSOP  
8-Pin SOIC  
• Built-in Over Temperature Alert (T  
)
OVER  
V
8
PWM  
DD  
1
• Temperature Proportional Fan Speed Control for  
Acoustic Noise Reduction and Longer Fan Life  
NC  
2
3
4
7 GND  
6
TC650  
TC651  
• Pulse Width Modulation Output Drive for Cost and  
Power Savings  
SHDN  
GND  
T
OVER  
5
NC  
• Solid-State Temperature Sensing  
• ±1°C (Typical) Accuracy from 25°C to +70°C  
• 2.8V – 5.5V Operating Range  
General Description  
• TC651 includes Auto Fan Shutdown  
• Low Operating Current: 50µA (Typical)  
The TC650/TC651 are integrated temperature sensors  
and brushless DC fan speed controllers. The TC650/  
TC651 measure their junction temperature and control  
the speed of the fan based on that temperature, making  
them especially suited for applications in modern  
electronic equipment.  
Applications  
• Thermal Protection For Personal Computers  
• Digital Set-Top Boxes  
• Notebook Computers  
• Data Communications  
• Power Supplies  
Temperature data is converted from the on-chip  
thermal sensing element and translated into  
fractional fan speed from 40% to 100%. A temperature  
selection guide in the data sheet is used to choose the  
low and high temperature limits to control the fan. The  
TC650/TC651 also include a single trip point over  
a
• Projectors  
Related Literature  
temperature alert (T  
) that eliminates the need for  
OVER  
additional temperature sensors. In addition, the TC651  
features an auto fan shutdown function for additional  
power savings.  
• Application Note: AN771  
Device Selection Table  
The TC650/TC651 are easy to use, require no software  
overhead and are therefore the ideal choice for  
implementing thermal management in a variety of  
systems.  
Temperature  
Range  
Part Number  
Package  
TC650XXVUA 8-PinSOIC  
TC651XXVUA 8-PinMSOP  
-40°C to +125°C  
-40°C to +125°C  
X
Temperature  
A
B
C
D
E
F
25  
30  
35  
40  
45  
50  
55  
G
The "X" denotes  
a suffix for temperature threshold settings.  
Contact factory for other temperature ranges.  
2002 Microchip Technology Inc.  
DS21450B-page 1  
TC650/TC651  
Typical Application Diagram  
+12V  
+5V V  
DD  
DC Fan  
500mA  
TC650  
TC651  
V
8
1
2
3
4
DD  
PWM  
C
SLOW  
NC  
GND 7  
T
6
OVER  
SHDN  
GND  
NC  
5
GND  
GND  
Over-Temp.  
Alert  
SHDN Control  
µController  
DS21450B-page 2  
2002 Microchip Technology Inc.  
TC650/TC651  
*Stresses above those listed under "Absolute Maximum Rat-  
ings" may cause permanent damage to the device. These are  
stress ratings only and functional operation of the device at  
these or any other conditions above those indicated in the  
operation sections of the specifications is not implied. Expo-  
sure to Absolute Maximum Rating conditions for extended  
periods may affect device reliability.  
1.0  
ELECTRICAL  
CHARACTERISTICS  
Absolute Maximum Ratings*  
Input Voltage (V to GND) ...................................+6V  
DD  
Output Voltage (OUT to GND) ................................. 6V  
Voltage On Any Pin....... (GND – 0.3V) to (V + 0.3V)  
DD  
Package Thermal Resistance (θ ) ..............250°C/W  
JA  
Operating Temperature Range ..........-40°C to +125°C  
Storage Temperature ......................... -65°C to +150°C  
TC650/TC651 ELECTRICAL SPECIFICATIONS  
Electrical Characteristics: VDD = 2.8V to 5.5V, SHDN = VDD, TA = -40°C to 125°C unless otherwise specified.  
Symbol  
Parameter  
Min  
Typ.  
Max  
Units Test Conditions  
VDD  
IDD  
Supply Voltage  
Supply Current  
2.8  
—
—
5.5  
90  
V
50  
µA  
PWM, TOVER are open  
SHDN Input  
VIH  
VIL  
SHDN Input High Threshold  
SHDN Input Low Threshold  
65  
—
—
—
—
%VDD  
%VDD  
15  
PWM Output  
VOL  
VOH  
tR  
PWM Output Low Voltage  
PWM Output High Voltage  
PWM Rise Time  
—
VDD - 0.5  
—
—
—
10  
0.3  
—
V
V
ISINK = 1mA  
ISOURCE = 5mA  
—
µsec IOH = 5mA, 1nF from  
PWM to GND  
tF  
PWM Fall Time  
—
10  
—
µsec IOL = 1mA, 1nF from  
PWM to GND  
fOUT  
PWM Frequency  
Start-up Time  
10  
—
15  
—
—
Hz  
tSTARTUP  
32/fOUT  
sec  
VDD Rises from GND,  
or SHDN Released  
Temperature Accuracy  
TH ACC  
High Temperature Accuracy  
TH – 3  
-1.0  
-2.5  
—
TH  
—
TH + 3  
+1.0  
+2.5  
—
°C  
°C  
°C  
°C  
Note 1  
(TH –TL) ACC Temp. Range Accuracy  
(TH - TL) ≤ 20°C  
(TH - TL) ≥ 20°C  
TC651 Only  
—
THYST  
Auto-shutdown Hysteresis  
(TH -TL)/5  
TOVER Output  
VHIGH  
TOVER Output High Voltage  
TOVER Output Low Voltage  
Absolute Accuracy  
VDD - 0.5  
—
—
—
0.4  
—
V
V
ISOURCE = 1.2mA  
ISINK = 2.5mA  
At Trip Point  
VLOW  
—
—
—
TOVER ACC  
TOVER HYST  
TH + 10  
5
°C  
°C  
Trip Point Hysteresis  
—
Note 1: Transition from 90% to 100% Duty Cycle.  
2002 Microchip Technology Inc.  
DS21450B-page 3  
TC650/TC651  
2.0  
PIN DESCRIPTIONS  
The descriptions of the pins are listed in Table 2-1.  
TABLE 2-1:  
Pin No.  
PIN FUNCTION TABLE  
(8-Pin MSOP) Symbol  
(8-Pin SOIC)  
Description  
1
2
3
V
Power Supply Input. May be independent of fan power supply.  
No Internal Connect.  
DD  
NC  
SHDN  
Fan Shutdown, Active-Low Input. During Shutdown mode the chip still monitors temper-  
ature and T  
is low if temperature rises above factory set point.  
OVER  
4
5
6
7
8
GND  
NC  
Ground. Ground return for all TC650/TC651 functions.  
No Connect.  
T
Over-Temperature Alert, Active-Low Output.  
Ground.  
OVER  
GND  
PWM  
PWM Fan Drive Output. Pulse width modulated rail-to-rail logic output. Nominal  
Frequency is 15Hz.  
DS21450B-page 4  
2002 Microchip Technology Inc.  
TC650/TC651  
FIGURE 3-1:  
FUNCTIONAL BLOCK  
DIAGRAM  
3.0  
DETAILED DESCRIPTION  
The TC650/TC651 acquire and convert their junction  
V+  
temperature (T ) information from an on-chip solid-state  
V
DD  
T
OVER  
J
SHDN  
sensor with a typical accuracy of ±1°C. The temperature  
data is digitally stored in an internal register. The  
register is compared with pre-defined threshold values.  
The six threshold values are equally distributed over a  
pre-defined range of temperatures (see Table 3-1 and  
Table 3-2). The TC650/TC651 control the speed of a  
DC brushless fan using a fractional speed control  
scheme. The output stage requires only a 2N2222-type  
small-signal BJT for fans up to 300mA. For larger  
current fans (up to 1 Amp) a logic-level N-channel  
MOSFET may be used. In addition to controlling the  
speed of the fan, the TC650/TC651 include an on-chip  
Duty Cycle  
Logic  
Control  
Temperature  
SetPointand  
TrimRange  
PWM  
A/D Converter  
Oscillator  
Temperature Sensor  
over-temperature alarm (T  
when the temperature of the chip exceeds T by 10°C,  
) that gives a low signal  
OVER  
3.1  
PWM Output  
H
(typical). This feature eliminates the need for a separate  
temperature sensor for over-temperature monitoring.  
The PWM pin is designed to drive a low cost transistor  
or MOSFET as the low side power switching element in  
the system. This output has an asymmetric  
complementary drive and is optimized for driving NPN  
transistors or N-channel MOSFETs. Since the system  
relies on PWM rather than linear power control, the  
dissipation in the power switch is kept to a minimum.  
Generally, very small devices (TO-92 or SOT  
packages) will suffice. The frequency of the PWM is  
about 15Hz. The PWM is also the time base for the  
Start-up Timer (see paragraphs below). The PWM duty  
cycle has a range of 40% to 100% for the TC650 and  
50% to 100% for the TC651.  
TABLE 3-1:  
TEMPERATURE RANGE  
DEFINITION FOR TC650  
(MINIMUM-SPEED MODE)  
Temperature (T = T )  
PWM Duty Cycle  
J
T < T  
40%  
L
T < = T < T  
50%  
L
1
T < = T < T  
60%  
1
2
T < = T <T  
70%  
2
3
T < = T < T  
80%  
3
4
H
3.2  
Start-Up Timer  
T < = T < T  
90%  
100%  
4
To ensure reliable fan start-up, the Start-up Timer turns  
PWM high for about 2 seconds whenever the fan is  
started from the off state. This occurs at power-up and  
when coming out of Shutdown mode.  
T
< = T < T  
OV  
H
T
< = T  
100% with Over Temp Alert  
OV  
(T  
= L)  
OVER  
3.3  
Over-Temperature Alert (TOVER)  
TABLE 3-2:  
TEMPERATURE RANGE  
DEFINITION FOR TC651  
(AUTO-SHUTDOWN MODE)  
This pin goes low when the T set point is exceeded by  
H
o
10 C (typical). This indicates that the fan is at  
maximum drive and the potential exists for system  
overheating; either heat dissipation in the system has  
gone beyond the cooling system's design limits, or  
some FAULT exists such as fan bearing failure or an  
airflow obstruction. This output may be treated as a  
“System Overheat” warning and used to trigger system  
shutdown, or bring other fans to full speed in the  
system. The fan will continue to run at 100% speed  
Temperature (T = T )  
PWM Duty Cycle  
J
T < T  
“OFF”  
L
T < = T < T  
50%  
L
1
T < = T < T  
60%  
1
2
T < =T < T  
70%  
2
3
T < =T < T  
80%  
3
4
while T  
is asserted. Built-in hysteresis prevents  
OVER  
T < = T < T  
90%  
100%  
4
H
T
from “chattering” when measured temperature  
OVER  
T
< = T < T  
OV  
H
is at or near the T + 10°C trip point. As temperature  
H
falls through the T + 10°C trip point, hysteresis  
T
< = T  
100% with Over-Temp Alert  
H
OV  
maintains the  
T
output low until measured  
(T  
= L)  
OVER  
OVER  
temperature is 5°C above the trip point setting.  
Note:The temperature regions defined by the six temperature thresh-  
olds are pre-defined in the TC650/TC651 by means of trimming. Once  
a TL and TH are programmed, the T1 – T4 thresholds are automatically  
equally spaced between TL and TH.  
2002 Microchip Technology Inc.  
DS21450B-page 5  
TC650/TC651  
T and T can be selected in 5°C increments. T must  
3.4  
Shutdown (SHDN)  
L
H
H
o
be chosen at least 10 C higher than T . T can range  
L
L
The fan can be unconditionally shutdown by pulling low  
the SHDN pin. During shutdown, the PWM output is  
low. This is ideal for notebook computers and other  
portable applications when you need to change  
batteries and must not have the fan running at that  
anywhere from 25°C to 35°C.  
As an example, suppose you wanted the fan to run at  
40% speed at 25°C or less and go to full speed at  
45°C. You would order the part number TC650AEVUA.  
time. Thermal monitoring and T  
are still in  
As another example, suppose you wanted the fan to  
turn on at 30°C and go to full speed at 45°C. You  
would order the part number TC651BEVUA.  
OVER  
operation during shutdown. I  
shutdown current is  
DD  
around 50µA.  
3.5  
Auto-Shutdown Mode  
The TC651 features auto-shutdown; when the  
temperature is below the factory set point at minimum  
speed (T ), PWM is low and the fan is automatically  
L
shut off (Auto-shutdown mode). This feature is ideal for  
notebook computers and other portable equipment that  
need to conserve as much battery power as possible  
and thus run a fan when it is only absolutely needed.  
The TC651 will continue to be active so as to monitor  
temperature for Tover. The TC651 exits Auto-shutdown  
mode when the temperature rises above the factory set  
point (T ).  
1
3.6  
Temperature Selection Guide  
(Minimum Fan Speed/Full Speed)  
The five temperature regions defined by the six  
thresholds are defined in the TC650/TC651 by means  
of factory trimming. Once a T and T are set, the T –  
L
H
1
T
thresholds are automatically equally spaced  
4
between T and T .  
L
H
Temp.  
Range  
T
T
Part #  
L
H
10°C  
15°C  
20°C  
30°C  
25  
30  
35  
25  
30  
35  
25  
30  
35  
25  
35  
40  
45  
40  
45  
50  
45  
50  
55  
55  
AC  
BD  
CE  
AD  
BE  
CF  
AE  
BF  
CG  
AG  
Note: The Bold Type temperature settings are available for  
ordering. Contact factory for other temperature selec-  
tions.  
DS21450B-page 6  
2002 Microchip Technology Inc.  
TC650/TC651  
4.0  
4.1  
TYPICAL APPLICATIONS  
Reducing Switching Noise  
For fans consuming more than 300mA, a slowdown  
capacitor (C is recommended for reducing  
)
SLOW  
switching PWM induced noise (see Figure 4-1). The  
value of this capacitor should be 4.7µF to 47µF,  
depending on the fan current consumption.  
See Application Note AN771 “Suppressing Acoustic  
Noise in PWM Fan Speed Control Systems” for more  
information.  
FIGURE 4-1:  
REDUCING SWITCHING  
NOISE  
+12V  
+5V V  
DD  
DC Fan  
TC650  
TC651  
500mA  
V
8
1
2
3
4
DD  
PWM  
C
SLOW  
NC  
GND 7  
T
6
OVER  
SHDN  
GND  
NC  
5
GND  
GND  
Over-Temp.  
Alert  
SHDN Control  
µController  
2002 Microchip Technology Inc.  
DS21450B-page 7  
TC650/TC651  
5.0  
TYPICAL CHARACTERISTICS  
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., out-  
side specified power supply range) and therefore outside the warranted range  
I
vs. Temperature  
Temperature Accuracy vs. V  
TH  
3.0  
DD  
90  
80  
70  
60  
50  
2.5  
2.0  
1.5  
V
DD = 5.6  
40  
30  
20  
10  
0
V
= 2.7  
DD  
1.0  
0.5  
0.0  
V
= 5.6  
V
DD  
= 2.7  
DD  
-25  
-50  
0
25 50 75 100 125 150  
T
T
T
T
H
T
T
3
1
4
2
L
T
TEMPERATURE (˚C)  
THRESHOLD  
PWM, I  
1.0  
vs. (V  
DD  
- V ), T = 25˚C  
PWM, I  
SINK  
vs. V , T = 25˚C  
OL  
SOURCE  
OH  
A
A
500  
0.9  
0.8  
0.7  
450  
400  
350  
V
= 2.8V  
DD  
V
= 2.8V  
DD  
0.6  
0.5  
0.4  
0.3  
0.2  
0.1  
300  
250  
200  
150  
V
= 5.5V  
V
= 5.5V  
DD  
DD  
100  
50  
0.0  
0.0  
0
2
4
6
8
10  
14  
18 20  
16  
12  
0
6
8
1
2
3
4
5
7
9
10  
I (mA)  
SOURCE  
I
(mA)  
SINK  
T
, I  
vs. (V - V ), T = 25˚C  
DD OH  
A
OVER SOURCE  
1.0  
0.9  
0.8  
0.7  
V
= 2.8V  
DD  
0.6  
0.5  
0.4  
0.3  
0.2  
0.1  
0.0  
V
= 5.5V  
DD  
6
8
1
2
3
4
5
7
9
10  
0
I
SOURCE (mA)  
DS21450B-page 8  
2002 Microchip Technology Inc.  
TC650/TC651  
6.0  
6.1  
PACKAGING INFORMATION  
Package Marking Information  
Package marking data not available at this time.  
6.2  
Taping Form  
Component Taping Orientation for 8-Pin MSOP Devices  
User Direction of Feed  
PIN 1  
W
P
Standard Reel Component Orientation  
for TR Suffix Device  
Carrier Tape, Number of Components Per Reel and Reel Size  
Package  
Carrier Width (W)  
Pitch (P)  
Part Per Full Reel  
Reel Size  
8-Pin MSOP  
12 mm  
8 mm  
2500  
13 in  
Component Taping Orientation for 8-Pin SOIC (Narrow) Devices  
User Direction of Feed  
PIN 1  
W
P
Standard Reel Component Orientation  
for TR Suffix Device  
Carrier Tape, Number of Components Per Reel and Reel Size  
Package  
Carrier Width (W)  
Pitch (P)  
Part Per Full Reel  
Reel Size  
8-Pin SOIC (N)  
12 mm  
8 mm  
2500  
13 in  
2002 Microchip Technology Inc.  
DS21450B-page 9  
TC650/TC651  
6.3  
Package Dimensions  
8-Pin MSOP  
PIN 1  
.197 (5.00)  
.189 (4.80)  
.122 (3.10)  
.114 (2.90)  
.026 (0.65) TYP.  
.122 (3.10)  
.114 (2.90)  
.043 (1.10)  
MAX.  
.008 (0.20)  
.005 (0.13)  
6° MAX.  
.016 (0.40)  
.010 (0.25)  
.006 (0.15)  
.002 (0.05)  
.028 (0.70)  
.016 (0.40)  
Dimensions: inches (mm)  
8-Pin SOIC  
PIN 1  
.157 (3.99)  
.150 (3.81)  
.244 (6.20)  
.228 (5.79)  
.050 (1.27) TYP.  
.197 (5.00)  
.189 (4.80)  
.069 (1.75)  
.053 (1.35)  
.010 (0.25)  
.007 (0.18)  
8
°
MAX.  
.020 (0.51)  
.013 (0.33)  
.010 (0.25)  
.004 (0.10)  
.050 (1.27)  
.016 (0.40)  
Dimensions: inches (mm)  
DS21450B-page 10  
2002 Microchip Technology Inc.  
TC650/TC651  
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.  
New Customer Notification System  
Register on our web site (www.microchip.com/cn) to receive the most current information on our products.  
2002 Microchip Technology Inc.  
DS21450B-page 11  
TC650/TC651  
NOTES:  
DS21450B-page 12  
2002 Microchip Technology Inc.  
TC650/TC651  
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 accuracy or use of such information, or infringement of  
patents or other intellectual property rights arising from such  
use or otherwise. Use of Microchip’s products as critical com-  
ponents in life support systems is not authorized except with  
express written approval by Microchip. No licenses are con-  
veyed, implicitly or otherwise, under any intellectual property  
rights.  
Trademarks  
The Microchip name and logo, the Microchip logo, FilterLab,  
KEELOQ, microID, MPLAB, PIC, PICmicro, PICMASTER,  
PICSTART, PRO MATE, SEEVAL and The Embedded Control  
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dsPIC, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB,  
In-Circuit Serial Programming, ICSP, ICEPIC, microPort,  
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MXDEV, PICC, PICDEM, PICDEM.net, rfPIC, Select Mode  
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Serialized Quick Turn Programming (SQTP) is a service mark  
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All other trademarks mentioned herein are property of their  
respective companies.  
© 2002, Microchip Technology Incorporated, Printed in the  
U.S.A., All Rights Reserved.  
Printed on recycled paper.  
Microchip received QS-9000 quality system  
certification for its worldwide headquarters,  
design and wafer fabrication facilities in  
Chandler and Tempe, Arizona in July 1999  
and Mountain View, California in March 2002.  
The Company’s quality system processes and  
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devices, Serial EEPROMs, microperipherals,  
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systems is ISO 9001 certified.  
2002 Microchip Technology Inc.  
DS21450B-page 13  
WORLDWIDE SALES AND SERVICE  
Japan  
AMERICAS  
ASIA/PACIFIC  
Microchip Technology Japan K.K.  
Benex S-1 6F  
3-18-20, Shinyokohama  
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Tel: 81-45-471- 6166 Fax: 81-45-471-6122  
Corporate Office  
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Tel: 480-792-7200 Fax: 480-792-7277  
Technical Support: 480-792-7627  
Web Address: http://www.microchip.com  
Australia  
Tel: 61-2-9868-6733 Fax: 61-2-9868-6755  
Korea  
Rocky Mountain  
China - Beijing  
Microchip Technology Korea  
168-1, Youngbo Bldg. 3 Floor  
Samsung-Dong, Kangnam-Ku  
Seoul, Korea 135-882  
2355 West Chandler Blvd.  
Chandler, AZ 85224-6199  
Tel: 480-792-7966 Fax: 480-792-7456  
Microchip Technology Consulting (Shanghai)  
Co., Ltd., Beijing Liaison Office  
Unit 915  
Bei Hai Wan Tai Bldg.  
Atlanta  
500 Sugar Mill Road, Suite 200B  
Atlanta, GA 30350  
Tel: 770-640-0034 Fax: 770-640-0307  
Boston  
2 Lan Drive, Suite 120  
Westford, MA 01886  
Tel: 978-692-3848 Fax: 978-692-3821  
Tel: 82-2-554-7200 Fax: 82-2-558-5934  
Singapore  
Microchip Technology Singapore Pte Ltd.  
200 Middle Road  
#07-02 Prime Centre  
No. 6 Chaoyangmen Beidajie  
Beijing, 100027, No. China  
Tel: 86-10-85282100 Fax: 86-10-85282104  
China - Chengdu  
Microchip Technology Consulting (Shanghai)  
Co., Ltd., Chengdu Liaison Office  
Rm. 2401, 24th Floor,  
Ming Xing Financial Tower  
No. 88 TIDU Street  
Singapore, 188980  
Tel: 65-6334-8870 Fax: 65-6334-8850  
Taiwan  
Microchip Technology Taiwan  
11F-3, No. 207  
Tung Hua North Road  
Taipei, 105, Taiwan  
Tel: 886-2-2717-7175 Fax: 886-2-2545-0139  
Chicago  
333 Pierce Road, Suite 180  
Itasca, IL 60143  
Chengdu 610016, China  
Tel: 86-28-6766200 Fax: 86-28-6766599  
Tel: 630-285-0071 Fax: 630-285-0075  
China - Fuzhou  
Dallas  
Microchip Technology Consulting (Shanghai)  
Co., Ltd., Fuzhou Liaison Office  
Unit 28F, World Trade Plaza  
No. 71 Wusi Road  
Fuzhou 350001, China  
4570 Westgrove Drive, Suite 160  
Addison, TX 75001  
EUROPE  
Denmark  
Microchip Technology Nordic ApS  
Regus Business Centre  
Lautrup hoj 1-3  
Ballerup DK-2750 Denmark  
Tel: 45 4420 9895 Fax: 45 4420 9910  
Tel: 972-818-7423 Fax: 972-818-2924  
Detroit  
Tri-Atria Office Building  
32255 Northwestern Highway, Suite 190  
Farmington Hills, MI 48334  
Tel: 248-538-2250 Fax: 248-538-2260  
Tel: 86-591-7503506 Fax: 86-591-7503521  
China - Shanghai  
Microchip Technology Consulting (Shanghai)  
Co., Ltd.  
Room 701, Bldg. B  
Far East International Plaza  
No. 317 Xian Xia Road  
Shanghai, 200051  
Tel: 86-21-6275-5700 Fax: 86-21-6275-5060  
Kokomo  
France  
2767 S. Albright Road  
Kokomo, Indiana 46902  
Tel: 765-864-8360 Fax: 765-864-8387  
Los Angeles  
Microchip Technology SARL  
Parc d’Activite du Moulin de Massy  
43 Rue du Saule Trapu  
Batiment A - ler Etage  
91300 Massy, France  
Tel: 33-1-69-53-63-20 Fax: 33-1-69-30-90-79  
Germany  
Microchip Technology GmbH  
Gustav-Heinemann Ring 125  
D-81739 Munich, Germany  
Tel: 49-89-627-144 0 Fax: 49-89-627-144-44  
18201 Von Karman, Suite 1090  
Irvine, CA 92612  
Tel: 949-263-1888 Fax: 949-263-1338  
China - Shenzhen  
Microchip Technology Consulting (Shanghai)  
Co., Ltd., Shenzhen Liaison Office  
Rm. 1315, 13/F, Shenzhen Kerry Centre,  
Renminnan Lu  
Shenzhen 518001, China  
Tel: 86-755-2350361 Fax: 86-755-2366086  
New York  
150 Motor Parkway, Suite 202  
Hauppauge, NY 11788  
Tel: 631-273-5305 Fax: 631-273-5335  
San Jose  
Microchip Technology Inc.  
2107 North First Street, Suite 590  
San Jose, CA 95131  
Tel: 408-436-7950 Fax: 408-436-7955  
Toronto  
Hong Kong  
Italy  
Microchip Technology Hongkong Ltd.  
Unit 901-6, Tower 2, Metroplaza  
223 Hing Fong Road  
Kwai Fong, N.T., Hong Kong  
Tel: 852-2401-1200 Fax: 852-2401-3431  
Microchip Technology SRL  
Centro Direzionale Colleoni  
Palazzo Taurus 1 V. Le Colleoni 1  
20041 Agrate Brianza  
Milan, Italy  
6285 Northam Drive, Suite 108  
Mississauga, Ontario L4V 1X5, Canada  
Tel: 905-673-0699 Fax: 905-673-6509  
India  
Tel: 39-039-65791-1 Fax: 39-039-6899883  
United Kingdom  
Arizona Microchip Technology Ltd.  
505 Eskdale Road  
Winnersh Triangle  
Wokingham  
Berkshire, England RG41 5TU  
Tel: 44 118 921 5869 Fax: 44-118 921-5820  
Microchip Technology Inc.  
India Liaison Office  
Divyasree Chambers  
1 Floor, Wing A (A3/A4)  
No. 11, O’Shaugnessey Road  
Bangalore, 560 025, India  
Tel: 91-80-2290061 Fax: 91-80-2290062  
03/01/02  
DS21450B-page 14  
2002 Microchip Technology Inc.  

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