PIC16C66-04/SP Microchip Integrated Circuit (Dual-In-Line Packages) In Stock
Microchip PIC16C66-04/SP is an 8-bit PIC16 OTP microcontroller running up to 4 MHz with 22 digital I/O lines and on-chip UART, SPI, and I2C peripherals. It offers 8 KB of one-time programmable program memory in a 28-pin narrow DIP package. Available in stock from authorized distributors with worldwide shipping.
- Manufacturer
- Microchip
- Package
- Dual-In-Line Packages
- Pin Count
- 28
- Lifecycle
- ACTIVE
- Datasheet
- PIC16C66-04/SP Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $5.6850(MOQ 1)
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8-bit PIC16 core with up to 4 MHz operation and 22 bidirectional I/O lines for simple embedded control
- On-chip USART, SPI, and I2C peripherals enabling multi-protocol communication without external logic
- OTP (one-time programmable) 8 KB Flash program memory suited for high-volume production locking
- 28-pin 0.3-inch narrow DIP package with through-hole leads for easy prototyping and socketed replacement
Applications
The PIC16C66-04/SP targets simple embedded control tasks such as appliance controllers, LED display drivers, and industrial I/O expanders where a low-cost 8-bit OTP MCU is sufficient. Its USART and synchronous serial interfaces enable communication with sensors, displays, and host processors in 4 MHz clock-speed applications. The narrow DIP-28 through-hole package suits legacy board repair, socketed test fixtures, and educational lab environments.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SPDIP-28 |
| Date Of Intro | 1993-07-01 |
| YTEOL | 3 |
| Has ADC | NO |
| Bit Size | 8 |
| Boundary Scan | NO |
| CPU Family | PIC16 |
| Clock Frequency-Max | 4MHz |
| DAC Channels | NO |
| DMA Channels | NO |
| Format | FIXED POINT |
| Integrated Cache | NO |
| JESD-30 Code | R-PDIP-T28 |
| 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 | DIP28,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| RAM (bytes) | 368 |
| ROM (words) | 8192 |
| ROM Programmability | EPROM |
| Screening Level | TS 16949 |
| Speed | 4MHz |
| Supply Current-Max | 20mA |
| Supply Voltage-Max | 6V |
| Supply Voltage-Min | 4V |
| Supply Voltage-Nom | 5V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| uPs/uCs/Peripheral ICs Type | MICROCONTROLLER, RISC |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.31.00.01 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for PIC16C66-04/SP:
RISC Microcontroller, 8-Bit, EPROM, PIC16 CPU, 4MHz, CMOS, PDSO28
RISC Microcontroller, 8-Bit, OTPROM, PIC16 CPU, 4MHz, CMOS, PDIP28
RISC Microcontroller, 8-Bit, OTPROM, PIC16 CPU, 4MHz, CMOS, PDIP28
Frequently Asked Questions
What maximum clock frequency does the PIC16C66-04/SP support and how does that affect instruction throughput?
The PIC16C66-04/SP runs at a maximum clock frequency of 4 MHz, executing one PIC instruction every 4 clock cycles for an effective throughput of 1 MIPS. This is adequate for simple I/O control, display multiplexing, and serial communication at baud rates up to 19200 bps. For faster throughput, the PIC16C66-20 variant supports up to 20 MHz.
How many I/O lines does the PIC16C66-04/SP provide and what communication interfaces are built in?
The PIC16C66-04/SP provides 22 bidirectional digital I/O lines distributed across 3 full 8-bit ports plus a partial port. On-chip peripherals include a USART for asynchronous serial communication, an SPI master/slave interface, and an I2C interface, all available without external logic. Two 8-bit and one 16-bit timer are also integrated for timing and PWM generation.
What distinguishes OTP program memory in the PIC16C66-04/SP versus Flash-based PIC16F devices for production use?
The PIC16C66-04/SP uses OTP (one-time programmable) memory, meaning firmware is written once and cannot be erased or reprogrammed. This trades the reprogrammability of Flash-based PIC16F parts for a lower unit cost per wafer at high production volumes and eliminates the risk of unauthorized firmware modification. For prototyping or firmware-update scenarios, the PIC16F628A or PIC16F876A with 8 KB Flash are typical alternatives.
In a legacy board repair scenario, what makes the PIC16C66-04/SP practical to source and install?
The PIC16C66-04/SP comes in a 28-pin narrow 0.3-inch DIP package with 2.54 mm through-hole pin spacing, making it compatible with standard IC sockets for tool-free replacement. Authorized distributors typically stock it with short lead times, and the SPDIP-28 footprint is found on millions of legacy PCBs designed in the 1990s and early 2000s using the PIC16C family.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $8.0300 | $8.03 |
| 2+ | $7.5800 | $15.16 |
| 4+ | $5.6850 | $22.74 |
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