425: Filing under Securities Act Rule 425 of certain prospectuses and communications in connection with business combination transactions

Filed by Microchip Technology Incorporated
Pursuant to Rule 425 under the Securities Act of 1933
Subject Company: Telcom Semiconductor, Inc.
Commission File No. 0-21184

The following slides were used at an investor conference on October 30, 2000.

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vin Why expand Microchip's Analog capability?

. Analog market growing from $22B in `99 to $48B in `03*

. Proprietary analog enjoys high, sustainable margins

. $1.50 of analog for every $1.00 of microcontroller**

. Leverage:

. Brand recognition

. Over 30,000 current PICmicro customers

. Sales and Applications resources

. Technology investment

. Design re-use
* Source: SIA June 2000
** Source: Design News-1998

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vin Why TelCom Semiconductor?

. Analog business is a natural fit for Microchip's microcontroller product line

. TelCom: 6,000 Analog customers, 230 Analog products and high quality
engineering team accelerate our Analog initiative by years

. TelCom's analog products and capabilities can increase microcontroller /
analog attach rates

. TelCom can leverage Microchip's existing fab capacity for both existing and
future products

. Attractive value - $185M enterprise value - $115M cash

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vin Microchip's Stand-alone Analog Customer Growth



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