PIC16C55-XT/SO Microchip Integrated Circuit (Other) In Stock
Microchip PIC16C55-XT/SO is an 8-bit PIC16C-family microcontroller with 0.75 KB OTP program memory and a 4 MHz maximum clock frequency in a 28-pin SOIC package. It features 20 I/O pins and is suited for simple embedded control tasks with one-time-programmable ROM. REACH-compliant and available in standard surface-mount format for legacy and low-cost designs.
- Manufacturer
- Microchip
- Package
- Other
- Pin Count
- 28
- Lifecycle
- ACTIVE
- Datasheet
- PIC16C55-XT/SO Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.9424(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 PIC16C architecture with 0.75 KB OTP memory for simple, cost-effective embedded control tasks
- 4 MHz maximum clock frequency with 1 µs instruction cycle time for deterministic timing applications
- 20 digital I/O pins in a 28-pin SOIC package enabling compact multi-signal control board designs
- One-time-programmable ROM eliminates erasing steps and suits high-volume production with fixed firmware
Applications
The PIC16C55-XT/SO is used in legacy industrial control panels, appliance timing circuits, and low-cost consumer devices that require simple 8-bit digital I/O sequencing without ADC or boundary scan complexity. Its OTP ROM makes it ideal for high-volume production runs where the firmware is frozen and cost per unit must be minimized. The 28-pin SOIC footprint allows easy PCB population on standard surface-mount assembly lines.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SOIC-28 |
| Reach Compliance Code | Compliant |
| Factory Lead Time | 5Weeks |
| 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-G28 |
| JESD-609 Code | e3 |
| Low Power Mode | YES |
| Number of I/O Lines | 20 |
| Number of Timers | 1 |
| On Chip Data RAM Width | 8 |
| On Chip Program ROM Width | 12 |
| PWM Channels | NO |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP28,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Qualification Status | Not Qualified |
| RAM (bytes) | 24 |
| RAM (words) | 24 |
| ROM (words) | 512 |
| ROM Programmability | OTPROM |
| Speed | 4MHz |
| Supply Current-Max | 3.3mA |
| Supply Voltage-Max | 6.25V |
| Supply Voltage-Min | 3.25V |
| Supply Voltage-Nom | 3.25V |
| 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 | Other |
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 PIC16C55-XT/SO:
Frequently Asked Questions
What memory capacity and clock speed does the PIC16C55-XT/SO offer for simple control tasks?
The PIC16C55-XT/SO provides 0.75 KB of OTP program memory and runs at up to 4 MHz, giving a 1 µs instruction cycle time. This combination suits fixed-function sequencing tasks such as relay timer logic, keyboard scanning, and LED pattern generation where the firmware is small enough to fit in under 512 program words and real-time response within microseconds is acceptable.
How does OTP program memory affect production economics for high-volume appliance designs?
One-time-programmable memory eliminates the UV-erase and re-program steps required by EPROM devices, reducing per-unit handling cost significantly at volumes above 10,000 units. Once the firmware is verified in a design validation run, OTP parts are programmed directly on the production line in seconds per device. The tradeoff is zero field-reprogrammability, so OTP devices like the PIC16C55 are best reserved for designs with stable, finalized firmware.
Is the PIC16C55-XT/SO a good fit for a new design, or should a flash-based PIC be chosen?
For new designs, Microchip recommends selecting a flash-based PIC16F device such as PIC16F886 which provides reprogrammable flash memory, an 8-channel 10-bit ADC, and similar 28-pin SOIC packaging at competitive pricing. The PIC16C55 YTEOL score of 3 suggests limited remaining production life, making it more appropriate for legacy system maintenance or final-order stocking than for new product development.
Can the PIC16C55-XT/SO drive external relays or optocouplers directly from its 20 I/O pins?
Each I/O pin of the PIC16C55-XT/SO can source or sink up to 25 mA, with a total device current limit of 200 mA across all ports. This allows direct connection to low-current optocoupler LEDs and small signal transistor bases for relay coil switching, provided the total current budget across all 20 I/O pins does not exceed the 200 mA device limit when multiple outputs are simultaneously active.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.9424 | $0.94 |
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