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PIC16F690 Product Overview
The PIC16F690 is a mature 20-pin 8-bit Flash microcontroller used in small control boards, appliances, sensor interfaces and legacy products. It integrates ADC, EEPROM, communications and timing functions in a familiar compact package.
Its strongest commercial role is installed-base support. Existing boards may have validated firmware, mechanical constraints and field history that make an exact replacement more attractive than redesigning around a newer MCU.
For new projects, buyers and engineers should compare the PIC16F690 with newer 20-pin devices, because Microchip identifies a newer option on the official product page.
Market position Best content angle: maintenance and lifecycle-extension demand. Use transparent migration guidance and avoid encouraging speculative stock without exact package and customer demand. |
PIC16F690 Key Specifications
Parameter | PIC16F Device Summary |
Architecture | 8-bit mid-range PIC MCU |
Maximum CPU speed | Up to 20 MHz |
Program Flash | 7 KB |
Data SRAM | 256 bytes |
Data EEPROM | 256 bytes |
I/O capability | Up to 18 I/O pins |
Analog | 10-bit ADC with up to 12 channels |
Clock options | Internal oscillator up to 8 MHz plus external options |
Serial interfaces | EUSART and MSSP supporting SPI/I2C |
Control peripherals | Timers, comparators and PWM/CCP resources |
Typical packages | 20-pin PDIP, SOIC, SSOP and QFN variants |
Official status | In Production; newer-device notice shown by Microchip |
Specifications can vary by device revision, package and full ordering code. Engineers should validate pinout, electrical limits, programming requirements and errata against the latest Microchip documentation before releasing a design.
Why This Device Still Attracts Buyer and Engineer Interest
Installed-base maintenance
Products already designed around PIC16F690 can create steady replacement demand when board changes are costly.
Balanced basic peripherals
ADC, EEPROM, serial interfaces and timers cover many simple mixed-signal controller requirements.
Compact 20-pin format
The package provides sufficient I/O for small control boards without moving to a 28- or 40-pin device.
Typical Applications
Appliance control
Supports buttons, sensors, indicators, relay outputs and basic communications.
Sensor and interface modules
ADC inputs, comparators and serial buses suit small monitoring nodes.
Lighting and power-control boards
Timers and PWM/CCP functions can manage switching and timed outputs.
Repair and service inventories
Exact-device sourcing may be required to maintain validated products and avoid firmware changes.
Design and Procurement Advantages
• Compact 20-pin package with analog, EEPROM and serial functions.
• Mature firmware and application knowledge in existing designs.
• Broad operating-voltage support for traditional embedded products.
• Relevant to maintenance and product-lifecycle extension.
Package and Ordering-Code Guidance
Package and suffix matter because PIC16F690 is supplied in multiple 20-pin forms. Confirm through-hole versus surface mount, temperature grade and packing. Do not mix PIC16F and PIC16LF voltage variants without electrical review.
1. Quote the complete orderable part number, not only the base device name.
2. Confirm package, temperature grade, packing method and required compliance documentation.
3. For replacement or migration projects, verify pin compatibility, oscillator behavior, peripheral registers, programming voltage and firmware changes.
4. For production purchases, agree acceptable lot/date-code range and traceability requirements before order confirmation.
Lifecycle and Market Position
Microchip displayed PIC16F690 as In Production on the review date and identified PIC16F18344 as a newer device. This supports continued sourcing while signaling that new designs should evaluate migration.
Migration note Microchip identifies PIC16F18344 as a newer device. It is not an automatic drop-in replacement; compare pinout, peripherals, memory, voltage and firmware behavior. |
Alternative and Migration Options
Replacement planning should start with the reason for change: availability, cost, power, memory or peripheral limitations.
• PIC16F18344 as the manufacturer-identified newer device for evaluation.
• PIC16F1829 for a 20-pin enhanced-mid-range device with more Flash and RAM.
• PIC16F15244 for a cost-effective current 20-pin architecture with a different peripheral set.
• An exact PIC16F690 order code for maintenance when redesign is not economically justified.
Alternative devices are comparison starting points only. They are not automatically pin-compatible or firmware-compatible, and the final choice must be validated against the complete electrical, mechanical and regulatory requirements.
Sourcing and Quality Checklist
• Confirm manufacturer, complete ordering code and requested quantity.
• Review product status, current PCNs, errata and any customer-specific qualification requirements.
• Specify package condition, moisture-sensitivity handling, packing and labeling requirements.
• Request lot/date-code information and traceability documentation appropriate to the transaction.
• Use incoming inspection and functional or programming verification proportionate to the application risk.
• Avoid approving substitutes solely on price; conduct engineering and quality review first.
Frequently Asked Questions
Is PIC16F690 discontinued?
No. Microchip displayed it as In Production on 31 August 2026.
What newer device does Microchip identify?
The official product page identifies PIC16F18344 as a newer device.
Can PIC16F18344 replace PIC16F690 directly?
Do not assume direct replacement. Hardware, firmware and qualification review are required.
Should a distributor stock PIC16F690?
Use demand-backed purchasing by exact suffix. Legacy demand can be real, but package fragmentation and date-code expectations increase inventory risk.
