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PIC MCUs expand with passive-keyless-entry, more peripherals

Posted: 14 Jul 2005 ?? ?Print Version ?Bookmark and Share

Keywords:microchip technology? microcontroller? mcu? pic12f510? pic16f506?

Microchip Technology Inc. has beefed-up its microcontroller (MCU) line with four new product offerings, broadening out both its low- and high-end families into new 8bit applications. The company has also launched an application-specific device for passive-keyless-entry and other wireless authentication uses.

For low-end cost sensitive applications, there's the new PIC12F510 (8-pin) and PIC16F506 (14-pin) MCUs. These two new PIC MCUs form the basic building blocks for a wide variety of systems across a broad range of markets. Their integrated analog functionality makes the units well suited for applications such as battery-operated products, power supplies and identification tags.

These two baseline 8bit flash MCUs come with up to two comparators and up to 3 channels of an 8-bit analog-to-digital converter. These analog features, combined with a faster internal oscillator (8MHz), provide designers with an easy way to integrate digital intelligence into more cost-sensitive applications. Features of the PIC12F510 and PIC16F506 include 1024 instructions (x12-bit program words) of flash program memory, 38 bytes to 67 bytes of data RAM memory, 25mA source/sink current I/O, low power (100nA) sleep current, wide operating voltage range from 2V to 5.5V, one 8-bit timer, and one watchdog timer.

Both devices are already available for general sampling. Volume production is planned for late 2005. In 10,000-unit quantities, the PIC12F510 is priced at 81 cents each, and the PIC16F506 at 90 cents each. The PIC12F510 comes in 8-pin PDIP, MSOP, SOIC while the PIC16F506 is housed in 14-pin PDIP, SOIC and TSSOPs.

Microchip has also expanded its PIC10F family with two members called the PIC10F220 and PIC10F222. They combine the new option of an onboard 8bit analog-to-digital converter with an 8bit, flash PIC MCU in a 6-pin SOT-23 package. The A/D converter compliments the comparator peripheral available on two of the four original family members. The new A/D and faster (8MHz) internal oscillator enable the PIC10F220 and PIC10F222 for battery-operated, power supply and property identification applications.

The two devices are offered in 6-pin SOT-23 packages. Limited sampling is available today, and volume production for both devices is expected in Q4 2005. In 10,000-unit quantities, the PIC10F220 is priced at 65 cents each and the PIC10F222 at 74 cents each.

The company's small PIC MCU line has been increased with a four member 20-pin family. These MCUs provide engineers with enhanced features such as steering-capable pulse-width modulation (PWM) and a synchronous serial port with address-masking for I2C, while offering additional program and data memory. The PIC16F685/687/689/690 offer smaller 4x4 QFN package options.

Several of the onboard peripherals were enhanced to provide greater flexibility and ease of use for design engineers. These enhancements include a new comparator module with more internal and external connections, and an analog-to-digital converter with up to 12 channels. Additionally, the onboard I?C synchronous serial port has address masking to support multiple addresses. The enhanced capture/compare/PWM module incorporates PWM steering, allowing output to multiple pins under software control a feature that provides greater layout flexibility for motor control and power supply applications. Another significant feature is the software-enabled Brownout Reset, which enables designers to significantly reduce standby current consumption in sleep.

All four MCUs are available now for sampling and volume production in 20-pin PDIP, SOIC, SSOP and QFN packages. Prices start at $1.78 each in 10,000-unit quantities.

The three-channel transponder analog front end provides bi-directional low frequency communication, commonly used in PKE and RFID applications. KEELOQ technology is based on a proprietary, non-linear encryption algorithm that creates a unique transmission on every use, rendering code capture and resend schemes useless. Additional key features of the pic16f639 MCU include precision 8MHz internal oscillator with software clock switching, up to 3.5KB of flash program memory, 128 bytes of RAM, 256 bytes of EEPROM, two analog comparators, one 8-bit timer and one 16-bit timer.

The analog front end boasts three channels for omni-directional 125kHz wireless communications, 3mV input sensitivity, programmable antenna tuning and support for batteryless operation. The PIC16F639 is available today for sampling in a 20-pin SSOP package, and volume production is expected in calendar Q3 2005. In 10,000-unit quantities, the PIC16F639 is $2.18 each.

The PIC16F639 is supported by the company's MPLAB Integrated Development Environment (IDE), MPLAB ICE 2000 in-circuit emulator, MPLAB PM3 universal device programmer, PICSTART Plus low-cost development system, MPLAB ICD 2 in-circuit debugger/programmer and the new PICkit 2 Starter Kit (expected to be available in August). In addition, a complete PIC16F639-based Passive Keyless Entry Reference Design (part # APGRD001) is expected to be available in Q3 2005.

- Marty Gold


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