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Microchips' 8bit MCUs cut need for external crystal

Posted: 20 Sep 2012     Print Version  Bookmark and Share

Keywords:USB  PIC  MCU 

Microchip Technology Inc. introduces three new families of MCUs under its Full-Speed USB 2.0 Device PIC MCU portfolio. Totalling 15 MCUs, the new devices feature internal clock sources with 0.25 per cent clock accuracy required for USB communication and eliminate the need for an external crystal. All the MCUs offer 35µA/MHz power consumption in active mode and 20nA in sleep mode.

8bit USB MCUs

The PIC16F145X family includes the company's smallest 14- and 20-pin MCUs at 4mm x 4mm. Featuring integrated peripherals, the three-member low-cost family enables embedded applications that require USB connectivity and capacitive touch sensing, such as pulse oxymeters, PC accessories and security dongles.

The PIC18F2X/4XK50 family includes devices with 28-, 40- or 44-pins, for a cost-effective, pin-compatible migration option for designs using legacy PIC18 USB MCUs. The family has three members, operating from 1.8V to 5V and integrating a "Charge Time Measurement Unit" for higher performance capacitative-touch sensing as well as measurement in applications such as audio docks and data loggers.

The PIC18F97J94 family has nine 8bit members with integrated LCD control, RTCC with Vbat, and USB in 64-, 80- and 100-pin packages. The 60x8 LCD controller offers a total of 480 segments, eliminating the need for an external controller in applications with large segmented displays. It also integrates a real-time clock/calendar with battery back-up for end products such as home-automation/security panels, handheld scanners and single-phase energy meters.

Tools to speed development
A downloadable and open-source USB Framework is available from the free Microchip Library of Applications (MLA), including USB drivers for common USB classes such as HID, CDC, Mass Storage, Win-USB and Audio-MIDI. These drivers can be used with all 15 of the new PIC MCUs.

A Low Pin Count USB Development Kit (part # DM164127) is also available for use with the PIC16F145X family. The PICDEM FS-USB Board (part # DM163025-1) is expected to be available in October, for use with the PIC18FXXK50 family.

Full-Speed USB Plug-in Modules (PIMs) are expected to be available in November for the PIC18F97J94 and PIC18F87J94.

The PIC16F145X family is available for sampling, with volume production expected in October. The PIC16F1454 and PIC16F1455 are offered in 14-pin SOIC, TSSOP and PDIP, as well as 4mm x 4mm 16-pin QFN packages, while the PIC16F1459 is available in 20 pins with the same package types and sizes.

The three-member PIC18FXXK50 family is available now for sampling, and volume production is expected in November. The PIC18F24K50 and PIC18F25K50 are offered in 28-pin SOIC, SSOP, SPDIP and 6x6 mm QFN packages, while the PIC18F45K50 is available in 44-pin TQFP, as well as 40-pin PDIP and 5x5 mm UQFN packages.

Finally, all nine members of the PIC18F97J94 family are expected to be available for sampling in October, and volume production is expected in November. The PIC18F65J94, PIC18F66J94 and PIC18F67J94 are offered in 64-pin TQFP and QFN packages. The PIC18F85J94, PIC18F86J94 and PIC18F87J94 are available in the 80-pin TQFP package. The PIC18F95J94, PIC18F96J94 and PIC18F97J94 are available in the 100-pin TQFP package.

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