PIC16C621A-04/SO Microchip Integrated Circuit (Small Outline Packages) In Stock
Microchip PIC16C621A-04/SO is an 8-bit EPROM-based microcontroller in the PIC16 family operating at up to 4 MHz clock. It is packaged in an 18-pin SOIC and offers digital I/O with a hardware watchdog timer. Suited for low-complexity consumer and industrial embedded control designs.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 18
- Lifecycle
- NOT RECOMMENDED
- Datasheet
- PIC16C621A-04/SO Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.8400(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 PIC16C621A-04/SO?
- 8-bit PIC16 core at up to 4 MHz for simple low-power control applications
- EPROM program memory allows reprogramming during prototyping and development cycles
- 18-pin SOIC package supports compact SMT board assembly
- Hardware watchdog timer improves system reliability in unattended operation
- Industrial temperature range -40°C to +85°C for rugged deployment environments
- Low supply current consumption enables battery-powered and energy-sensitive designs
What is PIC16C621A-04/SO used for?
The PIC16C621A-04/SO targets low-complexity embedded applications such as appliance timers, industrial panel indicators, and consumer electronics where an 8-bit microcontroller at 4 MHz is sufficient. Its EPROM memory and 18-pin SOIC footprint make it a practical choice for engineering prototypes and cost-sensitive production runs requiring minimal external circuitry. The device is also used in door-control modules, toy electronics, and simple sensor interfaces where reliability and low component count are the key requirements.
What are the specifications of PIC16C621A-04/SO?
| Pbfree Code | Yes |
| Manufacturer Package Code | SOIC-18 |
| Factory Lead Time | 5Weeks |
| Date Of Intro | 1990-01-01 |
| 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-PDSO-G18 |
| JESD-609 Code | e3 |
| Low Power Mode | YES |
| Number of External Interrupts | 1 |
| Number of I/O Lines | 13 |
| Number of Timers | 3 |
| On Chip Data RAM Width | 8 |
| On Chip Program ROM Width | 14 |
| PWM Channels | NO |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP18,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| RAM (bytes) | 96 |
| ROM (words) | 1024 |
| ROM Programmability | OTPROM |
| Speed | 40MHz |
| Supply Current-Max | 7mA |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 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 PIC16C621A-04/SO datasheet?
PIC16C621A-04/SO Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for PIC16C621A-04/SO?
Compatible alternatives and drop-in replacements for PIC16C621A-04/SO:
RISC Microcontroller, 8-Bit, OTPROM, PIC16 CPU, 40MHz, CMOS, PDSO18
Frequently Asked Questions
Why might a designer choose the PIC16C621A-04/SO EPROM device over a Flash-based PIC16 for prototyping?
EPROM devices like the PIC16C621A-04/SO can be erased under UV light and reprogrammed multiple times during the 4 MHz development cycle, making them useful when stable Flash-based production parts are unavailable. For short-run prototyping the 18-pin SOIC package also minimizes hand-soldering effort compared to QFP alternatives.
What environments benefit from the PIC16C621A-04/SO operating at -40°C to +85°C across the industrial temperature range?
Factory automation panels, outdoor utility meters, and automotive accessories exposed to temperature extremes all benefit from the -40°C to +85°C industrial grade. At a 4 MHz clock this PIC16 device maintains stable timing and I/O behavior across the full temperature span without requiring active thermal management.
How does the hardware watchdog timer in the PIC16C621A-04/SO enhance reliability in unattended control applications?
The built-in watchdog timer automatically resets the 8-bit PIC16 core if firmware execution stalls or enters an unrecoverable loop, restoring normal 4 MHz operation without human intervention. This is critical for unattended industrial controllers and consumer appliances that must recover autonomously from software faults during a product lifetime measured in years.
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More from Microchip
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $2.2100 | $2.21 |
| 100+ | $2.0500 | $205.00 |
| 1000+ | $1.9100 | $1910.00 |
| 5000+ | $1.8400 | $9200.00 |
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