Obsolete Device Please use 24LC32A. 24C32A 32K 5.0V I2C™ Serial EEPROM FEATURES PDIP A0 1 A1 2 A2 3 Vss 8 Vcc 7 WP 6 SCL 4 5 SDA A0 1 8 Vcc A1 2 7 WP A2 3 6 SCL Vss 4 5 SDA 24C32A SOIC 24C32A • Voltage operating range: 4.5V to 5.5V - Maximum write current 3 mA at 5.5V - Standby current 1 µA typical at 5.0V • 2-wire serial interface bus, I2C compatible • 100 kHz and 400 kHz compatibility • Self-timed ERASE and WRITE cycles • Power on/off data protection circuitry • Hardware write protect • 1,000,000 Erase/Write cycles guaranteed • 32-byte page or byte write modes available • Schmitt trigger filtered inputs for noise suppression • Output slope control to eliminate ground bounce • 2 ms typical write cycle time, byte or page • Up to eight devices may be connected to the same bus for up to 256K bits total memory • Electrostatic discharge protection > 4000V • Data retention > 200 years • 8-pin PDIP and SOIC packages • Temperature ranges - Commercial (C): 0°C to 70°C - Industrial (I): -40°C to +85°C - Automotive (E): -40°C to +125°C PACKAGE TYPES DESCRIPTION The Microchip Technology Inc. 24C32A is a 4K x 8 (32K bit) Serial Electrically Erasable PROM. It has been developed for advanced, low power applications such as personal communications or data acquisition. The 24C32A also has a page-write capability of up to 32 bytes of data. The 24C32A is capable of both random and sequential reads up to the 32K boundary. Functional address lines allow up to eight 24C32A devices on the same bus, for up to 256K bits address space. Advanced CMOS technology and broad voltage range make this device ideal for low-power/low-voltage, nonvolatile code and data applications. The 24C32A is available in the standard 8-pin plastic DIP and both 150 mil and 200 mil SOIC packaging. BLOCK DIAGRAM A0 A1 A2 WP I/O CONTROL LOGIC MEMORY CONTROL LOGIC HV GENERATOR XDEC EEPROM ARRAY PAGE LATCHES I/O SCL YDEC SDA VCC VSS SENSE AMP R/W CONTROL I2C is a trademark of Philips Corporation. 2004 Microchip Technology Inc. DS21163E-page 1 24C32A 1.0 1.1 ELECTRICAL CHARACTERISTICS TABLE 1-1: Maximum Ratings* VCC...................................................................................7.0V All inputs and outputs w.r.t. VSS ............... -0.6V to VCC +1.0V Storage temperature .....................................-65°C to +150°C Ambient temp. with power applied ................-65°C to +125°C Soldering temperature of leads (10 seconds) ............. +300°C ESD protection on all pins ..................................................≥ 4 kV PIN FUNCTION TABLE Name Function A0,A1,A2 VSS SDA SCL WP VCC User Configurable Chip Selects Ground Serial Address/Data I/O Serial Clock Write Protect Input +4.5V to 5.5V Power Supply *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 operational listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability. TABLE 1-2: DC CHARACTERISTICS Vcc = +4.5V to 5.5V Commercial (C): Tamb = 0°C to +70°C Industrial (I): Tamb = -40°C to +85°C Automotive(E): Tamb = -40°C to +125°C Parameter Symbol A0, A1, A2, SCL , SDA and WP pins: High level input voltage VIH Low level input voltage VIL Hysteresis of Schmitt Trigger VHYS inputs Low level output voltage VOL Input leakage current ILI Output leakage current ILO Pin capacitance CIN, COUT (all inputs/outputs) Operating current ICC Write ICC Read Standby current ICCS Note: Min Typ Max Units .7 VCC — .05 VCC — -10 -10 — — .3 Vcc — V V V .40 10 10 10 V µA µA pF — — — 3 0.5 5 mA mA µA 1 Conditions (Note) IOL = 3.0 mA VIN = .1V to VCC VOUT = .1V to VCC VCC = 5.0V (Note) Tamb = 25°C, Fc = 1 MHz VCC = 5.5V, SCL = 400 kHz VCC = 5.5V, SCL = 400 kHz SCL = SDA = VCC = 5.5V WP = VSS, A0, A1, A2 = VSS This parameter is periodically sampled and not 100% tested. FIGURE 1-1: BUS TIMING START/STOP VHYS SCL THD:STA TSU:STA TSU:STO SDA START DS21163E-page 2 STOP 2004 Microchip Technology Inc. 24C32A TABLE 1-3: AC CHARACTERISTICS Vcc = 4.5-5.5 Parameter Symbol Units Min Max Remarks Clock frequency FCLK — 100 kHz Clock high time THIGH 4000 — ns Clock low time TLOW 4700 — ns SDA and SCL rise time TR — 1000 ns (Note 1) SDA and SCL fall time TF — 300 ns (Note 1) START condition hold time THD:STA 4000 — ns After this period the first clock pulse is generated START condition setup time TSU:STA 4700 — ns Only relevant for repeated START condition Data input hold time THD:DAT 0 — ns Data input setup time TSU:DAT 250 — ns STOP condition setup time TSU:STO 4000 — ns Output valid from clock TAA — 3500 ns (Note 2) Bus free time TBUF 4700 — ns Time the bus must be free before a new transmission can start Output fall time from VIH min to VIL max TOF — 250 ns (Note 1), CB ≤ 100 pF Input filter spike suppression (SDA and SCL pins) TSP — 50 ns (Note 3) Write cycle time TWR — 5 ms — 1M — cycles Endurance 25°C, Vcc = 5.0V, Block Mode (Note 4) Note 1: Not 100% tested. CB = Total capacitance of one bus line in pF. 2: As a transmitter, the device must provide an internal minimum delay time to bridge the undefined region (minimum 300 ns) of the falling edge of SCL to avoid unintended generation of START or STOP conditions. 3: The combined TSP and VHYS specifications are due to Schmitt trigger inputs which provide improved noise and spike suppression. This eliminates the need for a Ti specification for standard operation. 4: This parameter is not tested but guaranteed by characterization. For endurance estimates in a specific application, please consult the Total Endurance Model which can be obtained on our website. FIGURE 1-2: BUS TIMING DATA TR TF THIGH TLOW SCL TSU:STA SDA IN THD:DAT TSU:DAT TSU:STO THD:STA TSP TAA THD:STA TAA TBUF SDA OUT 2004 Microchip Technology Inc. DS21163E-page 3 24C32A 2.0 FUNCTIONAL DESCRIPTION The 24C32A supports a Bi-directional 2-wire bus and data transmission protocol. A device that sends data onto the bus is defined as transmitter, and a device receiving data as receiver. The bus must be controlled by a master device which generates the Serial Clock (SCL), controls the bus access, and generates the START and STOP conditions, while the 24C32A works as slave. Both master and slave can operate as transmitter or receiver but the master device determines which mode is activated. 3.0 BUS CHARACTERISTICS 3.4 Data Valid (D) The state of the data line represents valid data when, after a START condition, the data line is stable for the duration of the HIGH period of the clock signal. The data on the line must be changed during the LOW period of the clock signal. There is one clock pulse per bit of data. Each data transfer is initiated with a START condition and terminated with a STOP condition. The number of the data bytes transferred between the START and STOP conditions is determined by the master device. The following bus protocol has been defined: 3.5 • Data transfer may be initiated only when the bus is not busy. • During data transfer, the data line must remain stable whenever the clock line is HIGH. Changes in the data line while the clock line is HIGH will be interpreted as a START or STOP condition. Each receiving device, when addressed, is obliged to generate an acknowledge signal after the reception of each byte. The master device must generate an extra clock pulse which is associated with this acknowledge bit. Note: Accordingly, the following bus conditions have been defined (Figure 3-1). 3.1 Bus not Busy (A) Both data and clock lines remain HIGH. 3.2 Start Data Transfer (B) A HIGH to LOW transition of the SDA line while the clock (SCL) is HIGH determines a START condition. All commands must be preceded by a START condition. 3.3 Stop Data Transfer (C) Acknowledge The 24C32A does not generate any acknowledge bits if an internal programming cycle is in progress. A device that acknowledges must pull down the SDA line during the acknowledge clock pulse in such a way that the SDA line is stable LOW during the HIGH period of the acknowledge related clock pulse. Of course, setup and hold times must be taken into account. During reads, a master must signal an end of data to the slave by NOT generating an acknowledge bit on the last byte that has been clocked out of the slave. In this case, the slave (24C32A) will leave the data line HIGH to enable the master to generate the STOP condition. A LOW to HIGH transition of the SDA line while the clock (SCL) is HIGH determines a STOP condition. All operations must be ended with a STOP condition. FIGURE 3-1: (A) DATA TRANSFER SEQUENCE ON THE SERIAL BUS (B) (D) (D) (C) (A) SCL SDA START CONDITION DS21163E-page 4 ADDRESS OR DATA ACKNOWLEDGE ALLOWED VALID TO CHANGE STOP CONDITION 2004 Microchip Technology Inc. 24C32A 3.6 Device Addressing Following the start condition, the 24C32A monitors the SDA bus checking the device type identifier being transmitted. Upon receiving a 1010 code and appropriate device select bits, the slave device outputs an acknowledge signal on the SDA line. Depending on the state of the R/W bit, the 24C32A will select a read or write operation. A control byte is the first byte received following the start condition from the master device. The control byte consists of a 4-bit control code; for the 24C32A this is set as 1010 binary for read and write (R/W) operations. The next three bits of the control byte are the device select bits (A2, A1, A0). They are used by the master device to select which of the eight devices are to be accessed. These bits are in effect the three most significant bits of the word address. The last bit of the control byte defines the operation to be performed. When set to a one a read operation is selected, and when set to a zero a write operation is selected. The next two bytes received define the address of the first data byte (Figure 3-3). Because only A11...A0 are used, the upper four address bits must be zeros. The most significant bit of the most significant byte of the address is transferred first. FIGURE 3-2: 0 1 FIGURE 3-3: R/W 0 A2 A1 R/W Read Write 1010 1010 Device Address Device Address 1 0 A A0 ADDRESS SEQUENCE BIT ASSIGNMENTS ADDRESS BYTE 1 CONTROL BYTE 0 Device Select READ/WRITE SLAVE ADDRESS 1 Control Code CONTROL BYTE ALLOCATION START 1 Operation 1 SLAVE ADDRESS 0 A 2 A 1 A 0 R/W 0 0 0 0 A 11 A 10 A 9 ADDRESS BYTE 0 A 8 A 7 • • • • • • A 0 DEVICE SELECT BUS 2004 Microchip Technology Inc. DS21163E-page 5 24C32A 4.0 WRITE OPERATION 4.2 4.1 Byte Write The write control byte, word address and the first data byte are transmitted to the 24C32A in the same way as in a byte write. But instead of generating a stop condition, the master transmits up to 32 bytes which are temporarily stored in the on-chip page buffer and will be written into memory after the master has transmitted a stop condition. After receipt of each word, the five lower address pointer bits are internally incremented by one. If the master should transmit more than 32 bytes prior to generating the stop condition, the address counter will roll over and the previously received data will be overwritten. As with the byte write operation, once the stop condition is received, an internal write cycle will begin. (Figure 4-2). Following the start condition from the master, the control code (four bits), the device select (three bits), and the R/W bit which is a logic low are clocked onto the bus by the master transmitter. This indicates to the addressed slave receiver that a byte with a word address will follow after it has generated an acknowledge bit during the ninth clock cycle. Therefore, the next byte transmitted by the master is the high-order byte of the word address and will be written into the address pointer of the 24C32A. The next byte is the least significant address byte. After receiving another acknowledge signal from the 24C32A the master device will transmit the data word to be written into the addressed memory location. Note: The 24C32A acknowledges again and the master generates a stop condition. This initiates the internal write cycle, and during this time the 24C32A will not generate acknowledge signals (Figure 4-1). FIGURE 4-1: S T A R T SDA LINE S DS21163E-page 6 S T O P DATA 0 0 0 0 A C K P A C K A C K A C K PAGE WRITE S BUS ACTIVITY T A MASTER R T BUS ACTIVITY ADDRESS LOW BYTE ADDRESS HIGH BYTE CONTROL BYTE BUS ACTIVITY SDA LINE Page write operations are limited to writing bytes within a single physical page, regardless of the number of bytes actually being written. Physical page boundaries start at addresses that are integer multiples of the page buffer size (or ‘page size’) and end at addresses that are integer multiples of [page size - 1]. If a page write command attempts to write across a physical page boundary, the result is that the data wraps around to the beginning of the current page (overwriting data previously stored there), instead of being written to the next page as might be expected. It is therefore necessary for the application software to prevent page write operations that would attempt to cross a page boundary. BYTE WRITE BUS ACTIVITY MASTER FIGURE 4-2: Page Write CONTROL BYTE ADDRESS HIGH BYTE ADDRESS LOW BYTE DATA BYTE 0 S T O P DATA BYTE 31 0 0 0 0 S A C K P A C K A C K A C K 2004 Microchip Technology Inc. 24C32A 5.0 ACKNOWLEDGE POLLING Since the device will not acknowledge during a write cycle, this can be used to determine when the cycle is complete (this feature can be used to maximize bus throughput). Once the stop condition for a write command has been issued from the master, the device initiates the internally timed write cycle. Acknowledge Polling (ACK) can be initiated immediately. This involves the master sending a start condition followed by the control byte for a write command (R/W = 0). If the device is still busy with the write cycle, then NO ACK will be returned. If the cycle is complete, then the device will return the ACK and the master can then proceed with the next read or write command. See Figure 5-1 for flow diagram. FIGURE 5-1: ACKNOWLEDGE POLLING FLOW Send Write Command 6.0 Read operations are initiated in the same way as write operations with the exception that the R/W bit of the slave address is set to one. There are three basic types of read operations: current address read, random read, and sequential read. 6.1 Current Address Read The 24C32A contains an address counter that maintains the address of the last word accessed, internally incremented by one. Therefore, if the previous access (either a read or write operation) was to address n (n is any legal address), the next current address read operation would access data from address n + 1. Upon receipt of the slave address with R/W bit set to one, the 24C32A issues an acknowledge and transmits the eight bit data word. The master will not acknowledge the transfer but does generate a stop condition and the 24C32A discontinues transmission (Figure 6-1). 6.2 Random Read Random read operations allow the master to access any memory location in a random manner. To perform this type of read operation, first the word address must be set. This is done by sending the word address to the 24C32A as part of a write operation (R/W bit set to zero). After the word address is sent, the master generates a start condition following the acknowledge. This terminates the write operation, but not before the internal address pointer is set. Then the master issues the control byte again but with the R/W bit set to a one. The 24C32A will then issue an acknowledge and transmit the 8-bit data word. The master will not acknowledge the transfer but does generate a stop condition which causes the 24C32A to discontinue transmission (Figure 6-2). Send Stop Condition to Initiate Write Cycle Send Start Send Control Byte with R/W = 0 Did Device Acknowledge (ACK = 0)? READ OPERATION NO YES Next Operation FIGURE 6-1: CURRENT ADDRESS READ BUS ACTIVITY MASTER S T A R T SDA LINE S BUS ACTIVITY CONTROL BYTE S T O P DATA BYTE P A C K N O A C K 2004 Microchip Technology Inc. DS21163E-page 7 24C32A 6.3 Contiguous Addressing Across Multiple Devices 6.4 Sequential Read Sequential reads are initiated in the same way as a random read except that after the 24C32A transmits the first data byte, the master issues an acknowledge as opposed to the stop condition used in a random read. This acknowledge directs the 24C32A to transmit the next sequentially addressed 8-bit word (Figure 6-3). Following the final byte transmitted to the master, the master will NOT generate an acknowledge but will generate a stop condition. The device select bits A2, A1, A0 can be used to expand the contiguous address space for up to 256K bits by adding up to eight 24C32A's on the same bus. In this case, software can use A0 of the control byte as address bit A12, A1 as address bit A13, and A2 as address bit A14. To provide sequential reads the 24C32A contains an internal address pointer which is incremented by one at the completion of each operation. This address pointer allows the entire memory contents to be serially read during one operation. The internal address pointer will automatically roll over from address 0FFF to address 000 if the master acknowledges the byte received from the array address 0FFF. FIGURE 6-2: RANDOM READ S T BUS ACTIVITY A MASTER R T SDA LINE CONTROL BYTE ADDRESS HIGH BYTE S T A R T ADDRESS LOW BYTE 0 0 0 0 S S T O P DATA BYTE S A C K A C K BUS ACTIVITY CONTROL BYTE P A C K A C K N O A C K FIGURE 6-3: SEQUENTIAL READ BUS ACTIVITY MASTER CONTROL BYTE DATA n DATA n + 1 DATA n + 2 S T O P DATA n + x P SDA LINE BUS ACTIVITY A C K A C K A C K A C K N O A C K DS21163E-page 8 2004 Microchip Technology Inc. 24C32A 7.0 PIN DESCRIPTIONS 8.0 7.1 A0, A1, A2 Chip Address Inputs The SCL and SDA inputs have filter circuits which suppress noise spikes to ensure proper device operation even on a noisy bus. All I/O lines incorporate Schmitt triggers for 400 kHz (Fast Mode) compatibility. The A0..A2 inputs are used by the 24C32A for multiple device operation and conform to the 2-wire bus standard. The levels applied to these pins define the address block occupied by the device in the address map. A particular device is selected by transmitting the corresponding bits (A2, A1, A0) in the control byte (Figure 3-3). 7.2 SDA Serial Address/Data Input/Output This is a Bi-directional pin used to transfer addresses and data into and data out of the device. It is an open drain terminal, therefore the SDA bus requires a pullup resistor to VCC (typical 10KΩ for 100 kHz, 2 KΩ for 400 kHz) For normal data transfer SDA is allowed to change only during SCL low. Changes during SCL HIGH are reserved for indicating the START and STOP conditions. 7.3 9.0 NOISE PROTECTION POWER MANAGEMENT This design incorporates a power standby mode when the device is not in use and automatically powers off after the normal termination of any operation when a stop bit is received and all internal functions are complete. This includes any error conditions, i.e., not receiving an acknowledge or stop condition per the two-wire bus specification. The device also incorporates VDD monitor circuitry to prevent inadvertent writes (data corruption) during low-voltage conditions. The VDD monitor circuitry is powered off when the device is in standby mode in order to further reduce power consumption. SCL Serial Clock This input is used to synchronize the data transfer from and to the device. 7.4 WP This pin must be connected to either VSS or VCC. If tied to VSS, normal memory operation is enabled (read/write the entire memory 000-FFF). If tied to VCC, WRITE operations are inhibited. The entire memory will be write-protected. Read operations are not affected. 2004 Microchip Technology Inc. DS21163E-page 9 24C32A 24C32A Product Identification System To order or to obtain information, e.g., on pricing or delivery, please use the listed part numbers, and refer to the factory or the listed sales offices. 24C32A - /P P = Plastic DIP (300 mil Body), 8-lead Package: SN = Plastic SOIC (150 mil Body, EIAJ standard) SM = Plastic SOIC (207 mil Body, EIAJ standard) Temperature Range: Blank = 0°C to +70°C I = -40°C to +85°C E = -40°C to +125°C Device: 24C32A 24C32AT 32K I2C Serial EEPROM (100 kHz, 400 kHz) 32K I2C Serial EEPROM (Tape and Reel) Sales and Support Data Sheets Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recommended 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: (602) 786-7277 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. DS21163E-page 10 2004 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 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 components in life support systems is not authorized except with express written approval by Microchip. No licenses are conveyed, implicitly or otherwise, under any intellectual property rights. Trademarks The Microchip name and logo, the Microchip logo, Accuron, dsPIC, KEELOQ, microID, MPLAB, PIC, PICmicro, PICSTART, PRO MATE, PowerSmart, rfPIC, and SmartShunt are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. AmpLab, FilterLab, MXDEV, MXLAB, PICMASTER, SEEVAL, SmartSensor and The Embedded Control Solutions Company are registered trademarks of Microchip Technology Incorporated in the U.S.A. Analog-for-the-Digital Age, Application Maestro, dsPICDEM, dsPICDEM.net, dsPICworks, ECAN, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB, In-Circuit Serial Programming, ICSP, ICEPIC, Migratable Memory, MPASM, MPLIB, MPLINK, MPSIM, PICkit, PICDEM, PICDEM.net, PICLAB, PICtail, PowerCal, PowerInfo, PowerMate, PowerTool, rfLAB, rfPICDEM, Select Mode, Smart Serial, SmartTel and Total Endurance are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. © 2004, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. Printed on recycled paper. Microchip received ISO/TS-16949:2002 quality system certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona and Mountain View, California in October 2003. The Company’s quality system processes and procedures are for its PICmicro® 8-bit MCUs, KEELOQ® code hopping devices, Serial EEPROMs, microperipherals, nonvolatile memory and analog products. In addition, Microchip’s quality system for the design and manufacture of development systems is ISO 9001:2000 certified. 2004 Microchip Technology Inc. DS21163E-page 11 WORLDWIDE SALES AND SERVICE AMERICAS China - Beijing Singapore Corporate Office Unit 706B Wan Tai Bei Hai Bldg. No. 6 Chaoyangmen Bei Str. Beijing, 100027, China Tel: 86-10-85282100 Fax: 86-10-85282104 200 Middle Road #07-02 Prime Centre Singapore, 188980 Tel: 65-6334-8870 Fax: 65-6334-8850 2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7200 Fax: 480-792-7277 Technical Support: 480-792-7627 Web Address: www.microchip.com China - Chengdu 3780 Mansell Road, Suite 130 Alpharetta, GA 30022 Tel: 770-640-0034 Fax: 770-640-0307 Rm. 2401-2402, 24th Floor, Ming Xing Financial Tower No. 88 TIDU Street Chengdu 610016, China Tel: 86-28-86766200 Fax: 86-28-86766599 Boston China - Fuzhou 2 Lan Drive, Suite 120 Westford, MA 01886 Tel: 978-692-3848 Fax: 978-692-3821 Unit 28F, World Trade Plaza No. 71 Wusi Road Fuzhou 350001, China Tel: 86-591-7503506 Fax: 86-591-7503521 Atlanta Chicago 333 Pierce Road, Suite 180 Itasca, IL 60143 Tel: 630-285-0071 Fax: 630-285-0075 Dallas 16200 Addison Road, Suite 255 Addison Plaza Addison, TX 75001 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 Kokomo 2767 S. Albright Road Kokomo, IN 46902 Tel: 765-864-8360 Fax: 765-864-8387 Los Angeles 25950 Acero St., Suite 200 Mission Viejo, CA 92691 Tel: 949-462-9523 Fax: 949-462-9608 San Jose 1300 Terra Bella Avenue Mountain View, CA 94043 Tel: 650-215-1444 Fax: 650-961-0286 Toronto 6285 Northam Drive, Suite 108 Mississauga, Ontario L4V 1X5, Canada Tel: 905-673-0699 Fax: 905-673-6509 China - Hong Kong SAR Unit 901-6, Tower 2, Metroplaza 223 Hing Fong Road Kwai Fong, N.T., Hong Kong Tel: 852-2401-1200 Fax: 852-2401-3431 Taiwan Kaohsiung Branch 30F - 1 No. 8 Min Chuan 2nd Road Kaohsiung 806, Taiwan Tel: 886-7-536-4816 Fax: 886-7-536-4817 Taiwan Taiwan Branch 11F-3, No. 207 Tung Hua North Road Taipei, 105, Taiwan Tel: 886-2-2717-7175 Fax: 886-2-2545-0139 Taiwan Taiwan Branch 13F-3, No. 295, Sec. 2, Kung Fu Road Hsinchu City 300, Taiwan Tel: 886-3-572-9526 Fax: 886-3-572-6459 EUROPE China - Shanghai Austria 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 Durisolstrasse 2 A-4600 Wels Austria Tel: 43-7242-2244-399 Fax: 43-7242-2244-393 China - Shenzhen Regus Business Centre Lautrup hoj 1-3 Ballerup DK-2750 Denmark Tel: 45-4420-9895 Fax: 45-4420-9910 Rm. 1812, 18/F, Building A, United Plaza No. 5022 Binhe Road, Futian District Shenzhen 518033, China Tel: 86-755-82901380 Fax: 86-755-8295-1393 China - Shunde Room 401, Hongjian Building, No. 2 Fengxiangnan Road, Ronggui Town, Shunde District, Foshan City, Guangdong 528303, China Tel: 86-757-28395507 Fax: 86-757-28395571 China - Qingdao Rm. B505A, Fullhope Plaza, No. 12 Hong Kong Central Rd. Qingdao 266071, China Tel: 86-532-5027355 Fax: 86-532-5027205 India Divyasree Chambers 1 Floor, Wing A (A3/A4) No. 11, O’Shaugnessey Road Bangalore, 560 025, India Tel: 91-80-22290061 Fax: 91-80-22290062 Japan ASIA/PACIFIC Yusen Shin Yokohama Building 10F 3-17-2, Shin Yokohama, Kohoku-ku, Yokohama, Kanagawa, 222-0033, Japan Tel: 81-45-471- 6166 Fax: 81-45-471-6122 Australia Korea Microchip Technology Australia Pty Ltd Unit 32 41 Rawson Street Epping 2121, NSW Sydney, Australia Tel: 61-2-9868-6733 Fax: 61-2-9868-6755 168-1, Youngbo Bldg. 3 Floor Samsung-Dong, Kangnam-Ku Seoul, Korea 135-882 Tel: 82-2-554-7200 Fax: 82-2-558-5932 or 82-2-558-5934 Denmark France 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 Steinheilstrasse 10 D-85737 Ismaning, Germany Tel: 49-89-627-144-0 Fax: 49-89-627-144-44 Italy Via Salvatore Quasimodo, 12 20025 Legnano (MI) Milan, Italy Tel: 39-0331-742611 Fax: 39-0331-466781 Netherlands Waegenburghtplein 4 NL-5152 JR, Drunen, Netherlands Tel: 31-416-690399 Fax: 31-416-690340 United Kingdom 505 Eskdale Road Winnersh Triangle Wokingham Berkshire, England RG41 5TU Tel: 44-118-921-5869 Fax: 44-118-921-5820 07/12/04 2004 Microchip Technology Inc.