PIC16F84A-04I/SO Microchip Integrated Circuit (Small Outline Packages) In Stock
Microchip PIC16F84A-04I/SO is an 8-bit RISC microcontroller in the PIC16 family, operating up to 4 MHz with 1 kW Flash program memory and 68 bytes RAM in an 18-pin SOIC package. Ideal for simple control, keypad scanning, and small state-machine applications. Available from stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 18
- Lifecycle
- ACTIVE
- Datasheet
- PIC16F84A-04I/SO Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8-bit PIC16 RISC core running at up to 4 MHz with EEPROM data memory, enabling simple non-volatile parameter storage without external memory chips
- 18-pin SOIC package with 13 general-purpose I/O pins providing ample GPIO for keypad scanning, LED driving, and relay control in compact designs
- Industry-standard PIC16 architecture with 1024-word Flash program memory and a broad ecosystem of compilers, debuggers, and application notes supporting rapid prototyping
Applications
The PIC16F84A-04I/SO is a classic 8-bit microcontroller suited for straightforward control tasks such as keypad-matrix scanning, LED display multiplexing, relay sequencing, and simple state-machine implementations in low-cost consumer electronics and educational projects. Its integrated EEPROM data memory allows storing user-configured parameters without external storage components, simplifying BOM in access-control keypads and appliance timers. The widely available 18-pin SOIC footprint and mature PIC16 toolchain make it an accessible choice for small-scale production and prototyping environments.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SOIC-18 |
| Factory Lead Time | 5Weeks |
| YTEOL | 8 |
| 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 | YES |
| 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) | 68 |
| ROM (words) | 1024 |
| ROM Programmability | FLASH |
| Screening Level | TS 16949 |
| Speed | 4MHz |
| Supply Current-Max | 10mA |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 4.5V |
| Supply Voltage-Nom | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| uPs/uCs/Peripheral ICs Type | MICROCONTROLLER, RISC |
| ## PIC16F84A-04I/SO Alternates Showing results | Image |
| 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 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for PIC16F84A-04I/SO:
suggested
suggested
suggested
suggested
suggested
suggested
RISC Microcontroller, 8-Bit, FLASH, PIC16 CPU, 4MHz, CMOS, PDSO18
Frequently Asked Questions
How much program memory does the PIC16F84A-04I/SO have, and is that enough for typical small control firmware?
The PIC16F84A-04I/SO provides 1024 words (1 kW) of Flash program memory using 14-bit PIC instructions, equivalent to roughly 1.75 kB of code storage. This capacity comfortably fits simple control loops, keypad scanners, and serial communication routines at 4 MHz but becomes a constraint for applications requiring complex algorithms or large lookup tables.
What clock frequency does the PIC16F84A-04I/SO support, and how does that translate to instruction throughput?
The PIC16F84A-04I/SO runs at a maximum clock frequency of 4 MHz, executing most single-cycle instructions at 1 MIPS (1 million instructions per second) since the PIC16 pipeline completes one instruction every 4 clock cycles. This throughput is adequate for GPIO toggling, interrupt-driven I/O, and UART communication at baud rates up to 9600 bps in typical embedded control applications.
Does the PIC16F84A-04I/SO include on-chip EEPROM, and how is it typically used?
Yes, the PIC16F84A-04I/SO integrates 64 bytes of on-chip EEPROM data memory, which retains values through power cycling without external memory. Designers commonly use this EEPROM to store user settings, calibration constants, security codes for access-control keypads, or runtime-adjustable configuration parameters that must survive power interruptions in appliance timers and simple automation controllers.
How does the PIC16F84A-04I/SO compare to newer PIC16F628A for cost-sensitive or legacy designs?
The PIC16F84A-04I/SO offers 1 kW Flash and 68 bytes RAM versus the PIC16F628A's 2 kW Flash and 224 bytes RAM at a similar 4 MHz to 20 MHz speed range. The PIC16F628A is generally preferred for new designs due to its larger memory and integrated comparators, but the PIC16F84A-04I/SO remains popular for maintaining compatibility with existing 18-pin SOIC footprint layouts and legacy firmware written for the PIC16C84 architecture.
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