PIC16C77-20I/L - 8-Bit 20MHz OTP MCU 14KB | Microchip
MPN: PIC16C77-20I/L ✓ Hoạt độngPIC16C77-20I/L Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data memory, and peripherals on one die, optimized for embedded control rather than computational throughput. Within the broader semiconductor taxonomy, the PIC16C77 belongs to the family of 8-bit microcontrollers -> microcontrollers -> microcontrollers (MCUs) -> embedded processors -> semiconductors. The OTP variant is intended for production designs where firmware is finalized and no field re-programmability is needed; a UV-erasable windowed sibling (CERDIP) is used during prototype bring-up.
Key differentiating specifications include 5 MIPS peak throughput at 20 MHz, 35 single-word instructions with all instructions executing in a single cycle except program branches (two cycles), high sink/source current of 25 mA/25 mA per pin suitable for direct LED driving, and ultra-low standby current of 1 uA typical at 3V/32 kHz for battery-backed applications. The wide 2.5 V to 6.0 V operating range covers both 3.3 V and 5 V systems from a single part.
Architecturally, the PIC16C77 uses a Harvard-class RISC core with separate program and data buses, enabling simultaneous instruction fetch and operand access. The CMOS process yields typical active current of 2 mA at 5 V/4 MHz and 15 uA at 3 V/32 kHz, giving designers headroom for power-budgeting in always-on industrial nodes. Brown-out reset and a programmable watchdog timer are integrated for unattended field operation.
Typical applications include industrial automation controllers, sensor signal conditioning front-ends, motor drive command processors, HVAC damper/valve actuators, automotive body and chassis subsystems, and white-goods user-interface boards. The 8-channel ADC is well-matched to multi-sensor scanning, while the dual PWM channels support brushed DC and stepper commutation.
When designing with this device, budget for OTP programming time during manufacturing (one-shot, no field updates) and ensure the PLCC-44 socket accommodates a programming adapter. The device's 25 mA sink/source eliminates many discrete driver transistors, simplifying PCB layout and BOM cost.
This page synthesizes DigiKey/Mouser/Octopart pricing, Microchip cross-reference guidance, and parametric drop-in alternatives not found in any single distributor listing, giving engineers a single-source decision view.
Bộ thay thế dễ dàng lắp đặt cho PIC16C77-20I/L — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC16C77-20I/L (cùng hình factor và footprint) — khác nhau ở Core Architecture, Operating Temperature, Package, Timers, Program Memory Type.
PIC16C77-10I/L
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C77-04I/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C77-04/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C77-10/PT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C77-20I/L Tỷ lệ tối đa & tính chất điện
| Architecture | 8-bit Harvard RISC |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 14 KB (8K x 14) |
| RAM Size | 368 bytes |
| EEPROM Data Memory | None (external only) |
| Tần số xung maksimum | 20 MHz |
| Instruction Throughput | 5 MIPS (200 ns per instruction) |
| Instruction Set | 35 single-word instructions |
| I/O Pins | 33 |
| ADC | 8 channels x 8-bit |
| Timers | 2 x 8-bit + 1 x 16-bit |
| Capture/Compare/PWM | 2 modules |
| Serial Interfaces | SSP (SPI / I2C) + USART |
| Operating Voltage | 2.5 V to 6.0 V (4.0 V to 5.5 V for 20 MHz) |
| I/O Sink/Source Current | 25 mA / 25 mA |
| Standby Current | 1 uA typical at 3 V / 32 kHz |
| Active Current | 15 uA typical at 3 V / 32 kHz; 2 mA typical at 5 V / 4 MHz |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial, "I") |
| Hộp | 44-pin PLCC (16.59 x 16.59 mm) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 3 (168 hours) |
| Lead-Free / RoHS | Lead-free terminal finish, RoHS compliant status varies by date code |
Cấu hình chân PIC16C77-20I/L
| Chân 1 | RA2/AN2 — PORTA bit 2 / ADC analog input 2 |
| Chân 2 | RA3/AN3 — PORTA bit 3 / ADC analog input 3 |
| Chân 3 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Chân 4 | RA5/AN4/SS — PORTA bit 5 / ADC input 4 / SPI slave select |
| Chân 5 | RA6/OSC2 — PORTA bit 6 / crystal oscillator output |
| Chân 6 | OSC1/CLKIN — Crystal oscillator input / external clock |
| Chân 7 | RA0/AN0 — PORTA bit 0 / ADC analog input 0 |
| Chân 8 | RA1/AN1 — PORTA bit 1 / ADC analog input 1 |
| Chân 9 | MCLR/VPP — Master clear reset / programming voltage input |
| Chân 10 | VSS — Ground reference |
| Chân 11 | VDD — Positive supply voltage |
| Chân 12 | RB7/PGD — PORTB bit 7 / ICSP data |
| Chân 13 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Chân 14 | RB5 — PORTB bit 5 |
| Chân 15 | RB4 — PORTB bit 4 |
| Chân 16 | RB3/CCP2 — PORTB bit 3 / Capture-Compare-PWM 2 |
| Chân 17 | RB2 — PORTB bit 2 |
| Chân 18 | RB1 — PORTB bit 1 |
| Chân 19 | RB0/INT — PORTB bit 0 / external interrupt |
| Chân 20 | VSS — Ground reference |
| Chân 21 | VDD — Positive supply voltage |
| Chân 22 | RC7/RX/DT — PORTC bit 7 / USART RX / synchronous data |
| Chân 23 | RC6/TX/CK — PORTC bit 6 / USART TX / synchronous clock |
| Chân 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| Chân 25 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Chân 26 | RC3/SCL/SCK — PORTC bit 3 / I2C clock / SPI clock |
| Chân 27 | RC2/CCP1 — PORTC bit 2 / Capture-Compare-PWM 1 |
| Chân 28 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator in / CCP2 |
| Chân 29 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator out / Timer1 clock |
| Chân 30 | RD7 — PORTD bit 7 |
| Chân 31 | RD6 — PORTD bit 6 |
| Chân 32 | RD5 — PORTD bit 5 |
| Chân 33 | RD4 — PORTD bit 4 |
| Chân 34 | RD3 — PORTD bit 3 |
| Chân 35 | RD2 — PORTD bit 2 |
| Chân 36 | RD1 — PORTD bit 1 |
| Chân 37 | RD0 — PORTD bit 0 |
| Chân 38 | VSS — Ground reference |
| Chân 39 | VDD — Positive supply voltage |
| Chân 40 | RE0/AN5 — PORTE bit 0 / ADC input 5 |
| Chân 41 | RE1/AN6 — PORTE bit 1 / ADC input 6 |
| Chân 42 | RE2/AN7 — PORTE bit 2 / ADC input 7 |
| Chân 43 | VSS — Ground reference |
| Chân 44 | VDD — Positive supply voltage |
Ứng dụng tiêu biểu
PIC16C77-20I/L phù hợp cho 6 Áp dụngs: Industrial Process Sensor Scanner, HVAC Damper and Valve Actuator Control, Automotive Body and Chassis Subsystems, White Goods User Interface Board, Battery-Backed Remote Sensor Node, Brushed DC Motor Speed Controller.
Industrial Process Sensor Scanner
The PIC16C77-20I/L fits industrial multi-sensor scanning because it integrates 8 channels of 8-bit ADC in one chip, allowing direct interface to thermistor, pressure, flow, and level transducers without an external analog mux. Its 33 digital I/O lines drive indicator LEDs, keypads, and relay coils at 25 mA per pin, eliminating discrete drivers. The 5 MIPS throughput at 20 MHz easily handles linearization, averaging, and Modbus-over-RS-485 framing in real time, and the 1 uA standby current preserves battery backup on panel-mounted controllers.
Được đề xuất
HVAC Damper and Valve Actuator Control
The PIC16C77-20I/L is well matched to HVAC actuator control thanks to its dual capture/compare/PWM channels, which directly drive TRIAC gate optos for AC damper/valve modulation while a third timer schedules the PID loop. The 8-channel ADC scans mixed-temperature and pressure sensors, and the USART links to a wall thermostat or building automation bus. Industrial -40 to +85 C operation tolerates rooftop and plant-room environments, and the 25 mA I/O eliminates relay-driver transistors in compact PCB layouts.
Được đề xuất
Automotive Body and Chassis Subsystems
For non-safety automotive body electronics such as seat controllers, mirror adjusters, or auxiliary lighting modules, the PIC16C77-20I/L provides 33 I/O with 25 mA drive, dual PWM for motor speed, and SPI/I2C for sensor and lighting-network peripherals. The -40 to +85 C Industrial grade tolerates under-dash thermal environments. However, AEC-Q100 safety-critical modules should migrate to a Q100-qualified Flash MCU; this part is appropriate only for body-comfort subsystems without functional-safety mandates.
Được đề xuất
White Goods User Interface Board
Washing machines, dishwashers, and microwave ovens benefit from the PIC16C77-20I/L's mix of 8-bit ADC for water-level/temperature sensing, dual PWM for motor and buzzer control, and 25 mA I/O to scan 7-segment LED displays without driver ICs. The USART interfaces to inverter boards, while SSP runs an I2C EEPROM for cycle-memory storage. Its 2.5-6.0 V supply range covers both 3.3 V and 5 V designs, simplifying BOM reuse across product variants in a white-goods family.
Được đề xuất
Battery-Backed Remote Sensor Node
The PIC16C77-20I/L is suited to duty-cycled remote sensor nodes because its 1 uA typical standby at 3 V/32 kHz lets a primary cell last years between service intervals. The internal ADC samples slow-moving environmental variables (temperature, humidity, soil moisture), and the USART bursts data through a 433 MHz or LoRa module on a periodic wake schedule. Brown-out reset protects against low-cell conditions, and the Industrial temperature grade tolerates outdoor enclosures in cold-climate deployments.
Được đề xuất
Brushed DC Motor Speed Controller
Speed control of small brushed DC motors (fans, pumps, conveyor rollers) maps directly onto the PIC16C77-20I/L's two capture/compare/PWM modules, which generate complementary PWM signals up to 20 kHz for MOSFET H-bridge gate drivers. The 8-channel ADC monitors back-EMF or current shunt feedback for closed-loop regulation. The 25 mA I/O drives opto-isolated fault inputs without buffering, and the USART exposes a tuning/debug port for factory calibration of motor parameters.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C77-20I/L — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC16C77-10I/L | PIC16C77-04I/L | PIC16C77-04/L |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-PLCC (16.59 x 16.59 mm) | 44-PLCC - same | 44-PLCC - same | 44-PLCC - same |
| Max Clock Frequency | 20 MHz | 10 MHz | 4 MHz | 4 MHz |
| Temperature Grade | Industrial (-40 to +85 C) | Industrial (-40 to +85 C) | Industrial (-40 to +85 C) | Commercial (0 to +70 C) |
| Program Memory Type | OTP (14 KB) | OTP (14 KB) | OTP (14 KB) | OTP (14 KB) |
| I/O Pins | 33 | 33 | 33 | 33 |
| ADC Channels | 8 x 8-bit | 8 x 8-bit | 8 x 8-bit | 8 x 8-bit |
| Operating Voltage | 4.0-5.5 V at 20 MHz | 2.5-6.0 V at 10 MHz | 2.5-6.0 V at 4 MHz | 2.5-6.0 V at 4 MHz |
Bảo phân biệt quan trọng
- Highest-speed grade in the PIC16C77 OTP family (vsPIC16C77-10I/L)
- Industrial temperature grade in a 20 MHz OTP MCU (vsPIC16C77-20/L)
- 33 high-current I/O pins eliminate driver ICs (vsPIC16C77-04I/L)
Ghi chú thiết kế
Place the 44-pin PLCC socket footprint on 1.27 mm (50 mil) pitch per IPC-7351 nominal PLCC-44 land pattern. Tie MCLR (pin 9) high through a 10 kohm pull-up to VDD, with a 100 nF cap to ground for noise immunity on industrial boards. Add a 10 uF bulk + 100 nF decoupling pair close to each VDD/VSS pin pair (pins 11/10, 21/20, 39/38, 44/43) - the PLCC has four VDD/VSS pairs to minimize switching-current loop area.
Estimated: At 5 V VDD, 20 MHz oscillator, the PIC16C77-20I/L draws approximately 15 mA active current; on a 2-layer FR-4 board with theta_JA around 80 C/W the junction-to-ambient rise is 1.2 C per mA. For battery-backed designs, leverage the 1 uA typical standby at 3 V/32 kHz by switching to the secondary LF oscillator via the OSCCON register before sleep and gating unused peripherals in PCFG and TRIS.
OTP memory cannot be re-programmed in the field, so the only firmware recovery after lockup is external programmer access via ICSP pins RB6/PGC (pin 13) and RB7/PGD (pin 12). Always design the ICSP header to be accessible even in production enclosures, or factory-reset becomes a recall event. Brown-out and watchdog must be enabled in the CONFIG word, or unexpected reset behavior will appear in field deployments.
Thông tin tuân thủ
RoHS compliant per Microchip product page; lead-free terminal finish. Industrial temperature grade (-40 to +85 C) but NOT AEC-Q100 qualified - not for safety-critical automotive. Halogen-free status not stated in the verified web data.
