PIC16C66-20/SO Microchip Integrated Circuit (Small Outline Packages) In Stock
PIC16C66-20/SO is an 8-bit PIC16 family EPROM microcontroller from Microchip operating at up to 20 MHz in a 28-pin SOIC surface-mount package. It features multiple I/O ports, on-chip timers, and USART for serial communication in embedded control systems. Available from global distributors with worldwide shipping.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 28
- Lifecycle
- ACTIVE
- Datasheet
- PIC16C66-20/SO Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $2.3200(MOQ 1)
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of PIC16C66-20/SO?
- 8-bit PIC16 CPU core with up to 20 MHz clock frequency for efficient control tasks
- EPROM-based program memory allowing one-time programming for finalized production designs
- 28-pin SOIC (SOIC-28) SMT package compatible with automated PCB assembly processes
- Multiple configurable digital I/O pins supporting diverse peripheral interfacing
- On-chip USART serial port enabling RS-232 and sensor communication without external ICs
What is PIC16C66-20/SO used for?
The PIC16C66-20/SO is used in industrial control panels, HVAC systems, and vending machines where an 8-bit microcontroller running at 20 MHz provides sufficient processing power for state-machine-based logic. Its EPROM program memory suits production firmware that does not require field updates, lowering per-unit cost in high-volume manufacturing. The 28-pin SOIC package integrates seamlessly into multi-layer PCBs alongside sensor signal-conditioning and power management circuits.
What are the specifications of PIC16C66-20/SO?
| Pbfree Code | Yes |
| Manufacturer Package Code | SOIC-28 |
| Date Of Intro | 1993-07-01 |
| YTEOL | 3 |
| Has ADC | NO |
| Bit Size | 8 |
| Boundary Scan | NO |
| CPU Family | PIC16 |
| Clock Frequency-Max | 20MHz |
| DAC Channels | NO |
| DMA Channels | NO |
| Format | FIXED POINT |
| Integrated Cache | NO |
| JESD-30 Code | R-PDSO-G28 |
| JESD-609 Code | e3 |
| Low Power Mode | YES |
| Number of External Interrupts | 1 |
| Number of I/O Lines | 22 |
| Number of Serial I/Os | 4 |
| Number of Timers | 5 |
| On Chip Data RAM Width | 8 |
| On Chip Program ROM Width | 14 |
| PWM Channels | NO |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP28,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| RAM (bytes) | 368 |
| ROM (words) | 8192 |
| ROM Programmability | EPROM |
| Screening Level | TS 16949 |
| Speed | 20MHz |
| Supply Current-Max | 20mA |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 4.5V |
| Supply Voltage-Nom | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| uPs/uCs/Peripheral ICs Type | MICROCONTROLLER, RISC |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.31.00.01 |
| Country of Origin | Thailand |
Where can I find the PIC16C66-20/SO datasheet?
PIC16C66-20/SO Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for PIC16C66-20/SO?
Compatible alternatives and drop-in replacements for PIC16C66-20/SO:
RISC Microcontroller, 8-Bit, EPROM, PIC16 CPU, 20MHz, CMOS, PDSO28
RISC Microcontroller, 8-Bit, OTPROM, PIC16 CPU, 20MHz, CMOS, PDSO28
Frequently Asked Questions
What distinguishes the EPROM program memory of the PIC16C66-20/SO from flash-based PIC devices in a production context?
The PIC16C66-20/SO uses EPROM program memory, which requires UV erasing before it can be reprogrammed—unlike flash devices that allow electrical in-circuit erasing. This makes it best suited for mature, stable firmware at 20 MHz where code changes are rare, as UV erasing is impractical in the field but acceptable in a controlled lab environment for limited firmware revisions during development.
How many I/O pins does the PIC16C66-20/SO provide, and which serial interfaces are available for connecting external devices?
The PIC16C66-20/SO offers up to 22 digital I/O pins across its ports in the 28-pin SOIC package, along with an on-chip USART that supports full-duplex serial communication at baud rates scaled to the 20 MHz system clock. This allows direct connection to RS-232 transceivers, GPS modules, and serial sensors without requiring external shift registers.
For an engineer choosing between the PIC16C66-20/SO and a PIC18 device, what factors favor the older 8-bit PIC16 part?
The PIC16C66-20/SO suits designs already proven at 20 MHz that need a cost-stable, long-lifecycle 8-bit controller in a 28-pin SOIC without migrating to a new toolchain or bootloader. Its EPROM memory eliminates flash wear concerns in high-cycle environments, and the PIC16 architecture is well-documented with decades of reference code and community support for industrial control applications.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $2.3200 | $2.32 |
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