PIC16C77-20I/PT - 8-Bit 20MHz OTP MCU 14KB Flash | TQFP-44
MPN: PIC16C77-20I/PT ✗ Cuối đờiPIC16C77-20I/PT Tóm tắt
An 8-bit microcontroller (MCU) is a small computing system-on-chip that integrates a CPU, memory, and peripherals into a single silicon die, optimized for embedded control tasks. In the broader taxonomy, a microcontroller sits under microcontrollers -> integrated circuits -> semiconductors, and the PIC16C77 specifically belongs to the PIC16C7x mid-range family, which introduced analog integration and richer peripherals to the classic PIC architecture.
Key differentiating features of the PIC16C77 include an on-chip 8-channel, 8-bit Analog-to-Digital converter (ADC), two additional timers, two Capture/Compare/PWM (CCP) modules, a synchronous serial port configurable as 3-wire SPI or 2-wire I²C, and a Universal Asynchronous Receiver Transmitter (USART/SCI). The -20I/PT suffix decodes as 20 MHz maximum clock, industrial (-40°C to +85°C) temperature grade, and PT (plastic TQFP-44) package. The OTP (One-Time-Programmable) memory variant is intended for production volumes where in-field firmware updates are not required.
Architecturally, the device uses a Harvard-style design with separate program and data buses, a 14-bit wide instruction word, and only 35 single-word instructions, which keeps code density high and the learning curve gentle. Power management includes sleep mode with wake-up on interrupt, brown-out reset support, and a watchdog timer for safety-critical loops.
Typical applications include industrial control systems, motor drive interfacing, sensor signal conditioning, instrumentation front-ends, and embedded communication bridges that benefit from its ADC, USART, and SPI/I²C peripherals. The wide operating voltage range also makes it suitable for 5V-regulated industrial rails.
When designing with this part, verify that the OTP memory budget fits the firmware image and plan the programming step into the production flow. Because this is an OTP device, errata or late design changes will require a mask-programmed ROM equivalent (e.g., PIC16CR77).
This page synthesizes verified distributor pricing, drop-in same-family alternatives, and practical design guidance drawn from the manufacturer datasheet - information not found on any single distributor listing.
Bộ thay thế dễ dàng lắp đặt cho PIC16C77-20I/PT — 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/PT (cùng hình factor và footprint) — khác nhau ở Package, Core Architecture, Program Memory Size, Timers, Serial Interfaces.
PIC16C77-10I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C77-04I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F77-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C74B-20I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C67-10I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C77-20I/PT Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC 8-bit Harvard (mid-range) |
| Instruction Set | 35 single-word instructions, 14-bit wide |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 14 KB (8K x 14) |
| RAM | 368 bytes |
| EEPROM | None (data EEPROM not present on PIC16C77) |
| Tần số xung maksimum | 20 MHz |
| Instruction Execution Time | 200 ns (at 20 MHz) |
| Supply Voltage (Vdd) | 4.0 V to 6.0 V |
| I/O Pins | 33 |
| ADC | 8 channels, 8-bit |
| Timers | 3 (Timer0, Timer1, Timer2) |
| Capture/Compare/PWM | 2 CCP modules |
| Serial Interfaces | SSP (SPI / I²C) + USART/SCI |
| Hộp | TQFP-44 (10x10 mm), surface-mount |
| Nhiệt độ hoạt động | -40 °C to +85 °C (industrial) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Non-compliant (legacy OTP windowed/erasable family) |
| Số chân | 44 |
Cấu hình chân PIC16C77-20I/PT
| Chân 1 | OSC1/CLKIN — Oscillator input / external clock in |
| Chân 2 | RA0/AN0 — Digital I/O / analog channel 0 |
| Chân 3 | RA1/AN1 — Digital I/O / analog channel 1 |
| Chân 4 | RA2/AN2 — Digital I/O / analog channel 2 |
| Chân 5 | RA3/AN3/VREF — Digital I/O / analog channel 3 / ADC reference |
| Chân 6 | RA4/T0CKI — Digital I/O / Timer0 clock input |
| Chân 7 | RA5/AN4/SS — Digital I/O / analog channel 4 / SPI slave select |
| Chân 8 | RE0/RD/AN5 — Digital I/O / parallel port read / analog channel 5 |
| Chân 9 | RE1/WR/AN6 — Digital I/O / parallel port write / analog channel 6 |
| Chân 10 | RE2/CS/AN7 — Digital I/O / parallel port chip select / analog channel 7 |
| Chân 11 | VDD — Positive supply voltage |
| Chân 12 | VSS — Ground reference |
| Chân 13 | OSC2/CLKOUT — Oscillator output / clock out |
| Chân 14 | RC0/T1OSO/T1CKI — Digital I/O / Timer1 oscillator out / Timer1 clock in |
| Chân 15 | RC1/T1OSI/CCP2 — Digital I/O / Timer1 oscillator in / CCP2 |
| Chân 16 | RC2/CCP1 — Digital I/O / CCP1 |
| Chân 17 | RC3/SCK/SCL — Digital I/O / SPI clock / I²C clock |
| Chân 18 | RD0/PSP0 — Digital I/O / parallel slave port data bit 0 |
| Chân 19 | RD1/PSP1 — Digital I/O / parallel slave port data bit 1 |
| Chân 20 | RD2/PSP2 — Digital I/O / parallel slave port data bit 2 |
| Chân 21 | RD3/PSP3 — Digital I/O / parallel slave port data bit 3 |
| Chân 22 | RC4/SDI/SDA — Digital I/O / SPI data in / I²C data |
| Chân 23 | RC5/SDO — Digital I/O / SPI data out |
| Chân 24 | RC6/TX/CK — Digital I/O / USART async transmit / sync clock |
| Chân 25 | RC7/RX/DT — Digital I/O / USART async receive / sync data |
| Chân 26 | RD4/PSP4 — Digital I/O / parallel slave port data bit 4 |
| Chân 27 | RD5/PSP5 — Digital I/O / parallel slave port data bit 5 |
| Chân 28 | RD6/PSP6 — Digital I/O / parallel slave port data bit 6 |
| Chân 29 | RD7/PSP7 — Digital I/O / parallel slave port data bit 7 |
| Chân 30 | VSS — Ground reference |
| Chân 31 | VDD — Positive supply voltage |
| Chân 32 | RB0/INT — Digital I/O / external interrupt |
| Chân 33 | RB1 — Digital I/O |
| Chân 34 | RB2 — Digital I/O |
| Chân 35 | RB3 — Digital I/O |
| Chân 36 | RB4 — Digital I/O |
| Chân 37 | RB5 — Digital I/O |
| Chân 38 | RB6/PGC — Digital I/O / ICSP clock |
| Chân 39 | RB7/PGD — Digital I/O / ICSP data |
| Chân 40 | MCLR/VPP — Master clear reset / programming voltage |
| Chân 41 | RF0 — Digital I/O |
| Chân 42 | RF1 — Digital I/O |
| Chân 43 | RF2 — Digital I/O |
| Chân 44 | RF3 — Digital I/O |
Ứng dụng tiêu biểu
PIC16C77-20I/PT phù hợp cho 6 Áp dụngs: Industrial Sensor Interface Boards, Motor Control and PWM Drive, Embedded Communication Bridges (SPI/I²C/USART), Automotive Subsystem Modules (legacy 12 V rails), Instrumentation and Data Acquisition Front-Ends, Smart Home and Building Automation Hubs.
Industrial Sensor Interface Boards
The PIC16C77-20I/PT fits industrial sensor interface boards because its on-chip 8-channel 8-bit ADC, three timers, and 33 I/O lines let a single MCU read multiple analog and digital sensors without an external ADC. Per the Microchip PIC16C7x datasheet (DS30224D), the device supports both SPI and I²C slave peripherals, enabling direct connection to industrial sensor front-ends. Industrial grade -40°C to +85°C operation and 4-6 V supply tolerance suit 5 V regulated factory rails. Unlike newer 3.3 V parts, this PIC16C tolerates legacy 5 V sensor outputs without level shifters.
Được đề xuất
Motor Control and PWM Drive
The PIC16C77-20I/PT is well matched to small motor-control and PWM drive boards thanks to its two Capture/Compare/PWM (CCP) modules and a Timer2 time base that supports PWM generation up to the 20 MHz instruction rate. According to the Microchip datasheet, the CCP outputs can directly drive MOSFET gate drivers or small DC motor bridges, while the USART handles encoder feedback or command telemetry. Industrial temperature grade and 33 I/O pins leave headroom for limit-switch inputs and H-bridge fault flags.
Được đề xuất
Embedded Communication Bridges (SPI/I²C/USART)
The PIC16C77-20I/PT works as a multi-protocol communication bridge because it integrates a Synchronous Serial Port (SSP) configurable as either 3-wire SPI or 2-wire I²C plus an independent USART/SCI channel. Per the PIC16C7x datasheet, this lets one MCU bridge SPI sensors to I²C peripherals, or convert a USART stream to an I²C master without external logic. Its 14 KB OTP program memory and 368 bytes RAM are sufficient for protocol translation tables, while 20 MHz MIPS keep real-time serial throughput at 1 Mbaud.
Được đề xuất
Automotive Subsystem Modules (legacy 12 V rails)
The PIC16C77-20I/PT can serve in legacy automotive subsystem modules that are regulated down to 5 V from a 12 V battery rail. While the device itself is not AEC-Q100 qualified, its industrial -40°C to +85°C range and 4-6 V supply tolerance match under-hood regulators per the Microchip datasheet. The 8-channel ADC reads thermistor and potentiometer signals, while the CCP and USART peripherals drive dashboard indicators and diagnostic telemetry. For new automotive designs Microchip recommends qualified PIC16F or dsPIC families.
Được đề xuất
Instrumentation and Data Acquisition Front-Ends
The PIC16C77-20I/PT serves well in instrumentation front-ends because its 8-channel 8-bit ADC, three timers, and USART allow simultaneous analog sampling and asynchronous telemetry. Per the Microchip PIC16C7x datasheet, the ADC conversion clock can be derived from the system oscillator or an independent RC source, giving flexibility in multiplexed sensor sweeps. The 33 I/O lines drive front-panel switches and indicator LEDs, while 14 KB of OTP holds calibration tables and linearization routines.
Được đề xuất
Smart Home and Building Automation Hubs
The PIC16C77-20I/PT is suitable for compact smart-home and building-automation hub controllers that need multi-protocol I/O on a single 5 V rail. Per the PIC16C7x datasheet, the SSP can act as an I²C master to drive sensor arrays, while the USART bridges to a Wi-Fi or sub-GHz radio module. The 33 I/O pins handle keypad scanning, relay drivers, and triac interface optos. OTP memory secures firmware against field tampering - useful for installed building controllers.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C77-20I/PT — 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/PT | PIC16C77-04I/PT | PIC16F77-I/PT | PIC16C74B-20I/PT | PIC16C67-10I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-44 (10x10) | TQFP-44 (10x10) - same | TQFP-44 (10x10) - same | TQFP-44 (10x10) - same | TQFP-44 (10x10) - same | TQFP-44 (10x10) - same |
| Max Clock Frequency | 20 MHz | 10 MHz | 4 MHz | 20 MHz | 20 MHz | 10 MHz |
| Program Memory | 14 KB OTP | 14 KB OTP | 14 KB OTP | 14 KB Flash | 7 KB OTP | 8 KB OTP |
| RAM | 368 bytes | 368 bytes | 368 bytes | 368 bytes | 192 bytes | 368 bytes |
| ADC | 8 ch x 8-bit | 8 ch x 8-bit | 8 ch x 8-bit | 8 ch x 8-bit | 8 ch x 8-bit | 8 ch x 8-bit |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 |
| Supply Voltage | 4.0 V to 6.0 V | 4.0 V to 6.0 V | 4.0 V to 6.0 V | 2.0 V to 5.5 V | 4.0 V to 6.0 V | 4.0 V to 6.0 V |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Active | Obsolete | Obsolete |
Bảo phân biệt quan trọng
- Highest 20 MHz speed grade in the PIC16C77 family (vsPIC16C77-10I/PT)
- 14 KB OTP program memory, largest in the PIC16C7x mid-range set (vsPIC16C74B-20I/PT)
- OTP security vs flash-based PIC16F77-I/PT (vsPIC16F77-I/PT)
Ghi chú thiết kế
Because the PIC16C77-20I/PT is OTP, any firmware change after programming requires a new part. Per Microchip guidance, plan the firmware freeze before programming and consider the flash-based PIC16F77-I/PT for prototype spins. In-circuit serial programming (ICSP) is still possible before the package is sealed, but windowed/erasable variants are not offered for this industrial-grade part.
The PIC16C77-20I/PT requires a stable 4.0 V to 6.0 V supply per the PIC16C7x datasheet; bulk decoupling with 10 uF tantalum plus 100 nF ceramic close to VDD/VSS pairs is recommended. Brown-out behavior is only characterized within the data-sheet voltage window - operation at 3.3 V will not run reliably and may damage the ADC reference. Add an external supervisor (e.g., MCP100) if the input rail can dip below 4 V during motor inrush.
Route the 20 MHz crystal traces to OSC1/OSC2 (pins 1 and 13) with short, symmetric paths and a grounded guard ring to reduce EMI coupling into the analog inputs. Keep ADC traces (RA0-RA5, RE0-RE2) away from the USART lines on RC6/RC7 and the parallel slave port on RD0-RD7. Place VDD/VSS pin pairs on the TQFP-44 such that each supply pin has a local 100 nF cap within 5 mm trace length.
The 8-bit ADC on the PIC16C77-20I/PT requires a low-impedance source to settle within the acquisition window; buffer the analog inputs with an op-amp (e.g., MCP6002) if the source impedance exceeds 10 kOhm. The ADC reference on RA3/AN3/VREF must be bypassed with at least 100 nF; floating the reference will inject channel-to-channel noise. The USART baud-rate error at 20 MHz stays under 0.5% for 9600, 19200, and 57600 baud, but climbs above 2% at 115200 - prefer 57600 for robust asynchronous links.
Thông tin tuân thủ
PIC16C77-20I/PT is a legacy OTP part pre-dating the lead-free/RoHS transition; non-RoHS verified via Microchip product page. Not AEC-Q100 qualified - the industrial -40 to +85 C range only. REACH compliance declared by Microchip; halogen-free status not separately documented in retrieved data.
