PIC16C55AT-04I/SS - 8-bit 4MHz 768B OTP MCU SSOP-28 | Microchip
MPN: PIC16C55AT-04I/SS ✓ نشطPIC16C55AT-04I/SS نظرة عامة
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals. The PIC16C5X family uses a RISC architecture with only 33 single-word/single-cycle instructions, placing it within the broader taxonomy of microcontroller -> embedded processor -> semiconductor device. MCUs serve as the decision-making core in countless embedded systems, replacing discrete logic and reducing BOM cost while adding reprogrammability.
Key features of the PIC16C55AT-04I/SS include 12-bit wide instructions that yield 2:1 code compression versus competing 8-bit architectures, an operating voltage range of 3.0 V to 6.25 V, a wide operating temperature range, and low power consumption typical of CMOS designs. The device provides 20 bidirectional I/O pins and supports both internal and external reset options, making it adaptable to various embedded control scenarios.
The PIC16C55AT-04I/SS uses a Harvard architecture with separate program and data buses, executed through a two-stage pipeline. With 768 bytes of OTP program memory and only 24 bytes of data RAM, this part is targeted at cost-sensitive, low-volume applications where Flash reprogrammability is unnecessary and one-time-programmable (OTP) memory is acceptable. The 4 MHz maximum clock provides instruction cycle times of 1 microsecond.
Typical applications include appliance control, automotive subsystems, low-end consumer electronics, industrial control, and remote transmitters. The compact SSOP-28 footprint also makes it suitable for space-constrained designs.
When designing with this device, note that the OTP memory cannot be erased or rewritten, so firmware must be fully validated before programming. Engineers should use the appropriate Microchip programmer (e.g., PICSTART Plus, MPLAB PM3) for device programming.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers and procurement teams a single source for evaluating the PIC16C55AT-04I/SS in new designs and legacy board reworks.
بدائل مباشرة لـ PIC16C55AT-04I/SS — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع PIC16C55AT-04I/SS (نفس عامل الشكل والبصمة) — يختلف في Program Memory Size, Package, Core Architecture, RAM Size, Watchdog Timer.
PIC16C55AT-04/SS
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16C55AT-04E/SS
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16C55A-04I/SS
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16C55A-20I/SS
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16C55-04I/SS
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PIC16C558-04I/SO
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16C55AT-04I/SS الحدود القصوى والخصائص الكهربائية
| Core Architecture | 8-bit PIC |
| Family | PIC16C5X |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 768 bytes (512 x 12-bit) |
| Data RAM | 24 bytes |
| أقصى تردد للساعة | 4 MHz |
| Instruction Cycle Time | 1 us at 4 MHz |
| I/O Pins | 20 |
| جهد التغذية | 3.0 V to 6.25 V |
| درجة حرارة التشغيل | -40C to +85C (Industrial) |
| العلبة | SSOP-28 |
| نوع التركيب | Surface Mount |
| Instruction Set | 33 single-word/single-cycle instructions |
| Instruction Width | 12-bit |
| Architecture | Harvard, RISC |
| حالة RoHS | Compliant |
تكوين أطراف PIC16C55AT-04I/SS
| دبوس 1 | RA2 — Bidirectional I/O pin |
| دبوس 2 | RA3 — Bidirectional I/O pin |
| دبوس 3 | RA4/T0CKI — Bidirectional I/O / Timer0 clock input |
| دبوس 4 | MCLR/VPP — Master Clear (reset) input / programming voltage |
| دبوس 5 | VSS — Ground reference |
| دبوس 6 | RB0/INT — Bidirectional I/O / External interrupt |
| دبوس 7 | RB1 — Bidirectional I/O pin |
| دبوس 8 | RB2 — Bidirectional I/O pin |
| دبوس 9 | RB3 — Bidirectional I/O pin |
| دبوس 10 | RB4 — Bidirectional I/O pin |
| دبوس 11 | RB5 — Bidirectional I/O pin |
| دبوس 12 | RB6 — Bidirectional I/O pin |
| دبوس 13 | RB7 — Bidirectional I/O pin |
| دبوس 14 | VSS — Ground reference |
| دبوس 15 | OSC1/CLKIN — Oscillator input / external clock input |
| دبوس 16 | OSC2/CLKOUT — Oscillator output / clock output |
| دبوس 17 | RC0 — Bidirectional I/O pin |
| دبوس 18 | RC1 — Bidirectional I/O pin |
| دبوس 19 | RC2 — Bidirectional I/O pin |
| دبوس 20 | RC3 — Bidirectional I/O pin |
| دبوس 21 | RC4 — Bidirectional I/O pin |
| دبوس 22 | RC5 — Bidirectional I/O pin |
| دبوس 23 | RC6 — Bidirectional I/O pin |
| دبوس 24 | RC7 — Bidirectional I/O pin |
| دبوس 25 | VSS — Ground reference |
| دبوس 26 | VDD — Positive supply voltage |
| دبوس 27 | RA0 — Bidirectional I/O pin |
| دبوس 28 | RA1 — Bidirectional I/O pin |
التطبيقات النموذجية
PIC16C55AT-04I/SS مناسب لـ 6 التطبيقs: Appliance Control, Industrial Control Systems, Remote Control and RF Transmitters, Low-End Consumer Electronics, Sensor Interface Modules, Automotive Body Electronics (Non-Safety).
Appliance Control
The PIC16C55AT-04I/SS fits appliance control designs through its compact SSOP-28 footprint, 20 I/O pins, and OTP memory suited to locked firmware production. The 4 MHz clock and 768-byte OTP program space handle sensor reads, relay actuation, and user-interface scanning for washers, dryers, microwaves, and dishwashers. With 3.0-6.25 V supply range, the part accepts both 3.3 V logic sensors and legacy 5 V relay drivers without level shifters.
موصى به
Industrial Control Systems
For industrial control, the PIC16C55AT-04I/SS delivers -40C to +85C industrial temperature operation, 20 mA source/sink I/O for direct LED and relay drive, and CMOS low-power consumption suitable for always-on monitoring nodes. The OTP memory prevents accidental firmware modification in the field, while the 33-instruction RISC core enables responsive control loops. The SSOP-28 package supports compact PLC I/O modules and sensor interface boards.
موصى به
Remote Control and RF Transmitters
The PIC16C55AT-04I/SS suits remote control transmitters because its 768-byte OTP holds simple button-scan and RF encoding firmware, while the 20 I/O pins directly drive key matrixes and modulator circuits. CMOS low power extends battery life in handheld transmitters, and the SSOP-28 small footprint fits key-fob and remote enclosures. Industrial temperature rating supports outdoor or automotive-garage applications.
موصى به
Low-End Consumer Electronics
The PIC16C55AT-04I/SS fits cost-sensitive consumer devices including desk toys, novelty electronics, simple timers, and basic educational kits. OTP memory at $2-3 unit cost keeps BOM minimal, while 20 I/O drive LEDs, buttons, and small displays directly. The 33-instruction RISC core is straightforward for embedded beginners and hobbyists.
موصى به
Sensor Interface Modules
The PIC16C55AT-04I/SS operates as a sensor pre-processor in distributed I/O modules, reading analog sensors via external ADC and conditioning signals before forwarding to a host controller. Its 24-byte RAM and 768-byte OTP handle linearization, calibration, and digital filtering for thermistor, RTD, and basic pressure sensors. Industrial temperature and 3-6.25 V supply accommodate plant-floor 5 V systems.
موصى به
Automotive Body Electronics (Non-Safety)
The PIC16C55AT-04I/SS handles non-safety automotive body functions such as interior lighting, seat-position memory, and accessory timing where AEC-Q100 is not strictly required. Industrial temperature rating covers cabin environments, and the OTP memory prevents field reprogramming of certified firmware. For under-hood or safety-critical modules, choose AEC-Q100-qualified PIC16F or PIC18F Q1 variants instead.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC16C55AT-04I/SS — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC16C55AT-04/SS | PIC16C55AT-04E/SS | PIC16C55A-04I/SS | PIC16C55A-20I/SS | PIC16C55-04I/SS | PIC16C558-04I/SO |
|---|---|---|---|---|---|---|---|
| Package | SSOP-28 | SSOP-28 - same | SSOP-28 - same | SSOP-28 - same | SSOP-28 - same | SSOP-28 - same | SOIC-28 wider (pin-compatible) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Maximum Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 20 MHz | 4 MHz | 4 MHz |
| Program Memory | 768 bytes OTP | 768 bytes OTP | 768 bytes OTP | 768 bytes OTP | 768 bytes OTP | 768 bytes OTP | 2 KB OTP |
| Data RAM | 24 bytes | 24 bytes | 24 bytes | 24 bytes | 24 bytes | 24 bytes | 128 bytes |
| I/O Pins | 20 | 20 | 20 | 20 | 20 | 20 | 20 |
| Operating Temperature | -40C to +85C (Industrial) | 0C to +70C (Commercial) | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| Supply Voltage | 3.0 V to 6.25 V | 3.0 V to 6.25 V | 3.0 V to 6.25 V | 3.0 V to 6.25 V | 3.0 V to 6.25 V | 3.0 V to 6.25 V | 3.0 V to 6.25 V |
| Memory Type | OTP | OTP | OTP | OTP | OTP | OTP | OTP |
أبرز الفروقات
- Compact SSOP-28 with industrial temperature range (مقابلPIC16C558-04I/SO)
- OTP memory prevents accidental firmware modification (مقابلPIC16F54-I/SS)
- 33-instruction RISC core with 2:1 code compression (مقابلPIC16C55-04I/SS)
ملاحظات التصميم
Place a 0.1 uF ceramic decoupling capacitor as close as possible to the VDD pin (pin 26) and a bulk capacitor (e.g., 10 uF tantalum or ceramic) on the supply rail. The PIC16C55AT-04I/SS operates from 3.0-6.25 V, so a regulated supply is recommended for sensitive analog applications. Power-on rise time should be less than the oscillator start-up time to ensure clean reset behavior; add an external RC delay on MCLR if the supply ramp is slow.
OTP memory cannot be erased or rewritten - verify firmware with a Flash-equivalent emulator (e.g., PIC16F54) before committing to OTP programming. Code-protect fuses, once set, prevent verification of programmed memory, so ensure firmware is fully debugged before enabling code protection. Use the appropriate Microchip programmer (PICSTART Plus, MPLAB PM3, or MPLAB ICD) with a known-good adapter socket to avoid programming failures.
The SSOP-28 has a 0.65 mm pitch - keep-out zone and trace width are tight; use 0.1 mm traces and 0.2 mm spaces minimum. Place the MCLR pull-up resistor (typically 10 kOhm) close to the pin to avoid noise-induced resets. If using an external crystal or resonator, place it within 5 mm of OSC1/OSC2 with short, symmetric traces and a ground guard ring to reduce EMI susceptibility.
I/O pins can source or sink up to 25 mA per pin, but the total package dissipation must not exceed 800 mW. If driving multiple high-current loads, distribute current across multiple ports to stay within thermal limits. For noisy industrial environments, add 100 nF capacitors near each I/O connector and use series resistors on signal lines to dampen ringing.
معلومات الامتثال
RoHS compliant per Microchip product page. Industrial temperature grade, not AEC-Q100 qualified - not suitable for automotive safety-critical applications. Use PIC16F or PIC18F Q1 variants for AEC-Q100.
