PIC16C77T-20/PT - 8-Bit 20MHz 14KB OTP MCU | Microchip
MPN: PIC16C77T-20/PT ✗ انتهى عمره الإنتاجيPIC16C77T-20/PT نظرة عامة
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral interfaces into one package. The PIC16C77 belongs to the PIC16 mid-range architecture, an 8-bit RISC family that executes one instruction per clock cycle (except branches), giving it deterministic throughput for embedded control. Within the broader PIC16CXX hierarchy, the PIC16C77 sits at the top of the family with the largest memory and highest I/O count, above the PIC16C73/74/76/765 cousins. As an OTP (One-Time Programmable) part, its EPROM program memory is written once via a programmer and is not electrically erasable, distinguishing it from the later flash-based PIC16F77.
Key features include 14KB of OTP program memory (8K x 14-bit words), 368 bytes of data RAM, 33 I/O pins, an integrated 8-channel 8-bit analog-to-digital converter, two Capture/Compare/PWM modules, a USART serial port, and a synchronous serial port (SSP) supporting SPI and I2C. The 20MHz maximum clock delivers 5 MIPS of instruction throughput, and the wide 2.5V-5.5V operating range (extended on the -I suffix variant) supports both 3.3V and 5V system designs.
The PIC16C77 uses a Harvard architecture with separate program and data buses, a 14-bit instruction word optimized for compact code, and Microchip's mid-range core. The CMOS static design means the clock can be stopped without losing internal state, making the part well suited to battery-backed applications. Peripherals are mapped into a single linear data-memory space and share a common interrupt structure.
Typical applications include industrial automation controllers, automotive body and chassis ECUs (the -I grade), appliance control boards, instrumentation front-ends, security system panels, and any embedded design requiring on-chip ADC plus serial communication. The 33 I/O pins and 8-channel ADC also suit multi-signal data-acquisition front-ends.
When designing with this part, note that OTP memory requires a device programmer with EPROM/UV-erase support and that the 'T' suffix indicates tape-and-reel packaging for high-volume assembly. For new designs prefer the flash-based PIC16F877 successor unless EPROM-based qualification is mandatory.
This page synthesizes distributor pricing, same-package drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
بدائل مباشرة لـ PIC16C77T-20/PT — 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 PIC16C77T-20/PT (نفس عامل الشكل والبصمة) — يختلف في Package, Timers, Program Memory Size, ADC, Core Architecture.
PIC16C77-20I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16F877-20I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16F877A-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16C74BT-20I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16C74B-20I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC16F874A-I/PT
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PIC16C77T-20/PT الحدود القصوى والخصائص الكهربائية
| Core Architecture | PIC16 mid-range 8-bit RISC |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 14 KB (8K x 14) |
| Data RAM | 368 bytes |
| Data EEPROM | Not present (OTP family) |
| أقصى تردد للساعة | 20 MHz |
| Instruction Throughput | 5 MIPS |
| جهد التغذية | 5 V nominal (4.0 V - 6.0 V operating range) |
| I/O Pins | 33 |
| ADC | 8-channel, 8-bit |
| Timers | 3 (Timer0, Timer1, Timer2) |
| Capture/Compare/PWM | 2 modules (CCP) |
| Serial Interfaces | USART (SCI), SSP (SPI / I2C) |
| العلبة | 44-pin TQFP (PT) 10x10 mm |
| درجة حرارة التشغيل | 0C to +70C (commercial); -40C to +85C on -I grade |
| نوع التركيب | Surface Mount |
| حالة RoHS | Not RoHS compliant (windowed/OTP legacy family) |
تكوين أطراف PIC16C77T-20/PT
| دبوس 1 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| دبوس 2 | RA0/AN0 — Port A bit 0 / analog input 0 |
| دبوس 3 | RA1/AN1 — Port A bit 1 / analog input 1 |
| دبوس 4 | RA2/AN2 — Port A bit 2 / analog input 2 |
| دبوس 5 | RA3/AN3/VREF — Port A bit 3 / analog input 3 / ADC reference |
| دبوس 6 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| دبوس 7 | RA5/AN4/SS — Port A bit 5 / analog input 4 / SSP slave select |
| دبوس 8 | RE0/RD/AN5 — Port E bit 0 / read control for parallel port / analog input 5 |
| دبوس 9 | RE1/WR/AN6 — Port E bit 1 / write control for parallel port / analog input 6 |
| دبوس 10 | RE2/CS/AN7 — Port E bit 2 / chip select for parallel port / analog input 7 |
| دبوس 11 | VDD — Positive supply (5 V) |
| دبوس 12 | VSS — Ground |
| دبوس 13 | OSC2/CLKOUT — Oscillator crystal output / clock output (Fosc/4) |
| دبوس 14 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer1 oscillator output / Timer1 clock input |
| دبوس 15 | RC1/T1OSI/CCP2 — Port C bit 1 / Timer1 oscillator input / CCP2 module |
| دبوس 16 | RC2/CCP1 — Port C bit 2 / CCP1 module |
| دبوس 17 | RC3/SCK/SCL — Port C bit 3 / SPI clock / I2C clock |
| دبوس 18 | RD0/PSP0 — Port D bit 0 / parallel slave port bit 0 |
| دبوس 19 | RD1/PSP1 — Port D bit 1 / parallel slave port bit 1 |
| دبوس 20 | RD2/PSP2 — Port D bit 2 / parallel slave port bit 2 |
| دبوس 21 | RD3/PSP3 — Port D bit 3 / parallel slave port bit 3 |
| دبوس 22 | RC4/SDI/SDA — Port C bit 4 / SPI data in / I2C data |
| دبوس 23 | RC5/SDO — Port C bit 5 / SPI data out |
| دبوس 24 | RC6/TX/CK — Port C bit 6 / USART TX / USART clock |
| دبوس 25 | RC7/RX/DT — Port C bit 7 / USART RX / USART data |
| دبوس 26 | RD4/PSP4 — Port D bit 4 / parallel slave port bit 4 |
| دبوس 27 | RD5/PSP5 — Port D bit 5 / parallel slave port bit 5 |
| دبوس 28 | RD6/PSP6 — Port D bit 6 / parallel slave port bit 6 |
| دبوس 29 | RD7/PSP7 — Port D bit 7 / parallel slave port bit 7 |
| دبوس 30 | VSS — Ground |
| دبوس 31 | VSS — Ground |
| دبوس 32 | VDD — Positive supply (5 V) |
| دبوس 33 | RB0/INT — Port B bit 0 / external interrupt |
| دبوس 34 | RB1 — Port B bit 1 |
| دبوس 35 | RB2 — Port B bit 2 |
| دبوس 36 | RB3/PGM — Port B bit 3 / low-voltage programming |
| دبوس 37 | RB4 — Port B bit 4 |
| دبوس 38 | RB5 — Port B bit 5 |
| دبوس 39 | RB6/PGC — Port B bit 6 / ICSP clock |
| دبوس 40 | RB7/PGD — Port B bit 7 / ICSP data |
| دبوس 41 | MCLR/VPP — Master clear reset / programming voltage input |
| دبوس 42 | NC — Not connected (per datasheet) |
| دبوس 43 | NC — Not connected (per datasheet) |
| دبوس 44 | NC — Not connected (per datasheet) |
التطبيقات النموذجية
PIC16C77T-20/PT مناسب لـ 6 التطبيقs: Industrial Automation Controllers, Automotive Body and Chassis ECUs, Appliance Control Boards, Instrumentation Front-Ends, Security and Access-Control Panels, Multi-Sensor Data Acquisition.
Industrial Automation Controllers
The PIC16C77T-20/PT fits industrial automation controllers because it combines 14 KB of OTP program memory for fixed control logic, 33 I/O lines for multi-sensor/actuator wiring, and an 8-channel 8-bit ADC for analog monitoring in a single 44-pin TQFP package. At 20 MHz / 5 MIPS it executes PID loops and supervisory state machines at comfortable headroom for sub-millisecond scan times. Placed near field wiring with opto-isolation on each I/O; unlike a PLC it requires a programmed OTP part per firmware revision but eliminates PLC scan-engine jitter.
موصى به
Automotive Body and Chassis ECUs
The PIC16C77T-20I/PT industrial-grade variant suits automotive body ECUs such as window lift, mirror, and seat controllers. Its 33 I/O pins drive relays and H-bridges, the USART interfaces to a body-controller network, and the 8-channel ADC reads current-sense shunts and switch positions. Operating from -40C to +85C, it tolerates under-hood thermal stress; unlike modern 32-bit automotive MCUs it lacks CAN but is sufficient for sub-network slaves that communicate via LIN or USART.
موصى به
Appliance Control Boards
The PIC16C77T-20/PT powers white-goods control boards such as washing-machine and dishwasher HMIs. Its 33 I/O lines drive 7-segment displays, keypads, LED indicators, and triac-fired loads; the 8-bit ADC reads temperature sensors and water-level probes. The 20 MHz / 5 MIPS throughput runs the display refresh and load-control state machine without jitter; unlike ASIC controllers it allows post-production firmware customization for region-specific features.
موصى به
Instrumentation Front-Ends
The PIC16C77T-20/PT serves as the controller in portable instrumentation front-ends where its 8-channel 8-bit ADC digitizes multiple sensor channels, and its 14 KB OTP program memory stores calibration tables and menu logic. The USART uploads logged data to a host PC, while the 33 I/O lines drive LCD and keypad. At 5 MIPS it performs 8-bit FFTs and digital filtering in real time; unlike higher-end DSPs it stays at sub-1W power consumption for battery operation.
موصى به
Security and Access-Control Panels
The PIC16C77T-20/PT is well suited to security panels: 33 I/O lines scan keypads and PIR sensors, the USART links to a central monitoring station via modem, and the 14 KB OTP program memory protects against field firmware tampering. The 8-channel ADC monitors backup-battery voltage and tamper loops. Unlike mask-ROM controllers, OTP allows customized zone-mapping per installation; designers should choose the -I grade variant for outdoor cabinet temperature tolerance.
موصى به
Multi-Sensor Data Acquisition
The PIC16C77T-20/PT is a strong fit for multi-sensor data-acquisition modules: 8-channel 8-bit ADC digitizes thermocouples, strain gauges, and pressure transducers; 33 I/O lines expand to additional MUX'd channels via 74HC4051s; the SSP supports SPI/I2C for digital sensors. At 20 MHz it samples and averages channels fast enough for vibration monitoring; unlike an FPGA it integrates MCU + ADC + comms in a single chip, reducing BOM and PCB area in compact embedded modules.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC16C77T-20/PT — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC16C77-20I/PT | PIC16F877-20I/PT | PIC16F877A-I/PT | PIC16C74BT-20I/PT | PIC16F874A-I/PT |
|---|---|---|---|---|---|---|
| Package | TQFP-44 (PT) 10x10 mm | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 14 KB OTP | 14 KB OTP | 14 KB flash | 14 KB flash | 7 KB flash | 7 KB flash |
| RAM | 368 B | 368 B | 368 B | 368 B | 192 B | 192 B |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 |
| Max Clock | 20 MHz / 5 MIPS | 20 MHz / 5 MIPS | 20 MHz / 5 MIPS | 20 MHz / 5 MIPS | 20 MHz / 5 MIPS | 20 MHz / 5 MIPS |
| Operating Temp | 0C to +70C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Memory Type | OTP EPROM (one-time) | OTP EPROM (one-time) | flash (10K cycles) | flash (10K cycles) | flash (1K cycles) | flash (10K cycles) |
| RoHS | Non-compliant | Non-compliant | Non-compliant | Compliant | Compliant | Compliant |
| ICD Debug | No (OTP only) | No (OTP only) | Yes | Yes | Yes | Yes |
أبرز الفروقات
- Largest program memory in PIC16C7X family (14 KB) (مقابلPIC16C74B family)
- PIC16C77 has 368 B RAM vs 192 B on PIC16C74B (مقابلPIC16C74B family)
- Industrial temperature -I grade available as PIC16C77-20I/PT (مقابلStandard commercial grade)
ملاحظات التصميم
The PIC16C77T-20/PT is OTP EPROM, not flash. Once programmed, the firmware cannot be erased or rewritten electrically; firmware bugs require scrapping the part. For development, use a windowed ceramic package (PIC16C77-20/JW) or a flash-based PIC16F877A drop-in replacement. Do not assume the 'F' in PIC16F877A refers to firmware - it refers to flash memory technology.
Place a 100 nF decoupling capacitor as close as possible to each VDD pin (pins 11 and 32 on TQFP-44). Add a 10 uF bulk capacitor near the MCLR/VPP pin. The TQFP-44 (PT) package has 33 I/O lines, all of which can source/sink up to 25 mA per pin (max 200 mA total per port); design the PCB trace widths for peak port current, not average current, to avoid voltage-drop-induced logic-level violations.
OSC1/OSC2 crystal traces should be kept short (< 10 mm) and surrounded by a ground guard ring. For 20 MHz operation, use a fundamental-mode crystal with 15-33 pF load capacitors; higher harmonics will not oscillate reliably in the PIC mid-range oscillator. The MCLR pin must have a 10 kohm pull-up to VDD; do not leave it floating, as the part will reset intermittently on noise.
Route the analog inputs (RA0-RA5, RE0-RE2) on a separate PCB layer or keep them away from the digital port lines (RB/RC/RD). The 8-bit ADC on the PIC16C77 has no dedicated analog ground pin; place the VSS reference for analog signals at the same VSS pin used by the part. Without this, ADC readings can show 1-2 LSB of crosstalk from adjacent switching I/O lines.
معلومات الامتثال
PIC16C OTP/EPROM family predates RoHS; non-compliant by design. Use PIC16F877A-I/PT for RoHS-compliant designs.