PIC16C77T-20E/PT - 8-Bit 20MHz OTP MCU 14KB | Microchip
料号： PIC16C77T-20E/PT ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $7.92 | $7.92 |
| 10 | $7.18 | $71.80 |
| 100 | $6.05 | $605.00 |
| 500 | $5.32 | $2,660.00 |
| 1,000 | $4.78 | $4,780.00 |
PIC16C77T-20E/PT 概述
A PIC microcontroller is a compact, single-chip computer built around the Harvard architecture with separate program and data buses. The PIC16C family specifically refers to the classic mid-range 14-bit instruction-set core introduced in the 1990s, which sits within Microchip's broader product hierarchy of 8-bit MCU -> microcontroller -> embedded controller -> semiconductor. OTP program memory means the device is programmed once at production time and cannot be erased, making it suited for high-volume, cost-sensitive applications where firmware is stable.
Key features of the PIC16C77T-20E/PT include an 8-channel 8-bit Analog-to-Digital Converter, three timer modules, a Universal Synchronous Asynchronous Receiver Transmitter (USART), a Capture/Compare/PWM module, and an extended operating temperature range of -40C to +125C for harsh-environment deployments. The 33 I/O pins provide generous connectivity for sensors, actuators, and communication peripherals.
Architecturally, the PIC16C77 uses a RISC instruction set with 35 single-word instructions and a 14-bit instruction word, enabling deterministic execution at four oscillator clocks per instruction cycle. The OTP EPROM cell array is fabricated on a non-volatile process that provides high noise immunity and decades of data retention at room temperature, though it cannot be electrically erased in-circuit.
Typical applications include industrial control systems, automotive body and powertrain subsystems, appliance controls, sensor signal conditioning, motor control front-ends, and embedded communication bridges. The wide temperature range makes it especially well suited to under-hood automotive modules and outdoor industrial equipment.
When designing with the PIC16C77T-20E/PT, plan for in-circuit programming via Microchip's ICSP interface because OTP cannot be reprogrammed. Always budget development cycles around a flash-equivalent PIC16F or PIC18F device for code iteration, then migrate to OTP for production.
This page synthesizes distributor pricing, drop-in same-package alternatives from Microchip's own PIC16C and PIC16F families, and practical design guidance not found in the standalone datasheet, giving engineers an actionable reference beyond the manufacturer document.
直接替换替代料： PIC16C77T-20E/PT ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC16C77T-20E/PT （相同外形与封装尺寸） ——差异在于 Package, Serial Interfaces, Timers, Program Memory Size, Program Memory Type.
快速对比工具——选择替代料号进行并排对比：
PIC16C77-20I/PT
✅ 直接替换✓ 有现货
$6.1 / 个
查看数据手册 →PIC16C77-10/PT
✅ 直接替换✓ 有现货
$5.7 / 个
查看数据手册 →PIC16C77-04E/PT
✅ 直接替换✓ 有现货
$10.45 / 个
查看数据手册 →PIC16C74B-20I/PT
✅ 直接替换✓ 有现货
$4.62 / 个
查看数据手册 →PIC16F877A-I/PT
✅ 直接替换✓ 有现货
$4.95 / 个
查看数据手册 →PIC16C77T-20E/PT 最大额定值与电气特性
| Core Processor | PIC16C |
| Core Size | 8-bit |
| Program Memory Type | OTP (One-Time Programmable EPROM) |
| Program Memory Size | 14 KB (8K x 14) |
| RAM Size | 368 x 8 bytes |
| 最大时钟频率 | 20 MHz |
| Number of I/O Pins | 33 |
| 封装 | 44-TQFP (10x10 mm) |
| 安装类型 | Surface Mount |
| 电源电压 | 5 V nominal (per datasheet) |
| 工作温度范围 | -40C to +125C (Enhanced, "E") |
| ADC | 8 channels x 8-bit (per datasheet) |
| Timers | 3 (Timer0, Timer1, Timer2) (per datasheet) |
| Communication | USART (SCI), SSP/SPI/I2C (per datasheet) |
| PWM Modules | Capture/Compare/PWM module (per datasheet) |
| Instruction Set | 35 instructions, 14-bit width, RISC (per datasheet) |
PIC16C77T-20E/PT 引脚配置
| 引脚 1 | MCLR#/VPP — Master Clear (active low) / Programming voltage |
| 引脚 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| 引脚 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| 引脚 4 | RA2/AN2 — PORTA bit 2 / Analog input 2 |
| 引脚 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / ADC reference + |
| 引脚 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| 引脚 7 | RA5/AN4/SS# — PORTA bit 5 / Analog input 4 / SPI slave select |
| 引脚 8 | RE0/RD#/AN5 — PORTE bit 0 / Parallel port read / Analog input 5 |
| 引脚 9 | RE1/WR#/AN6 — PORTE bit 1 / Parallel port write / Analog input 6 |
| 引脚 10 | RE2/CS#/AN7 — PORTE bit 2 / Parallel port chip select / Analog input 7 |
| 引脚 11 | VDD — Positive supply |
| 引脚 12 | VSS — Ground |
| 引脚 13 | OSC1/CLKIN — Oscillator input / external clock |
| 引脚 14 | OSC2/CLKOUT — Oscillator output |
| 引脚 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock |
| 引脚 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| 引脚 17 | RC2/CCP1 — PORTC bit 2 / Capture Compare PWM 1 |
| 引脚 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| 引脚 19 | RD0/PSP0 — PORTD bit 0 / Parallel slave port 0 |
| 引脚 20 | RD1/PSP1 — PORTD bit 1 / Parallel slave port 1 |
| 引脚 21 | RD2/PSP2 — PORTD bit 2 / Parallel slave port 2 |
| 引脚 22 | RD3/PSP3 — PORTD bit 3 / Parallel slave port 3 |
| 引脚 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| 引脚 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| 引脚 25 | RC6/TX/CK — PORTC bit 6 / USART TX / USART clock |
| 引脚 26 | RC7/RX/DT — PORTC bit 7 / USART RX / USART data |
| 引脚 27 | RD4/PSP4 — PORTD bit 4 / Parallel slave port 4 |
| 引脚 28 | RD5/PSP5 — PORTD bit 5 / Parallel slave port 5 |
| 引脚 29 | RD6/PSP6 — PORTD bit 6 / Parallel slave port 6 |
| 引脚 30 | RD7/PSP7 — PORTD bit 7 / Parallel slave port 7 |
| 引脚 31 | VSS — Ground |
| 引脚 32 | VDD — Positive supply |
| 引脚 33 | RB0/INT — PORTB bit 0 / External interrupt |
| 引脚 34 | RB1 — PORTB bit 1 |
| 引脚 35 | RB2 — PORTB bit 2 |
| 引脚 36 | RB3/PGM — PORTB bit 3 / Low-voltage programming |
| 引脚 37 | RB4 — PORTB bit 4 |
| 引脚 38 | RB5 — PORTB bit 5 |
| 引脚 39 | RB6/PGC — PORTB bit 6 / ICSP clock |
| 引脚 40 | RB7/PGD — PORTB bit 7 / ICSP data |
| 引脚 41 | NC — Not connected (per datasheet) |
| 引脚 42 | NC — Not connected (per datasheet) |
| 引脚 43 | NC — Not connected (per datasheet) |
| 引脚 44 | NC — Not connected (per datasheet) |
典型应用
PIC16C77T-20E/PT 适用于 6 应用s: Industrial Control Systems, Automotive Body and Powertrain Modules, Appliance Control Electronics, Sensor Signal Conditioning and Data Acquisition, Embedded Communication Bridges, Motor Control Front-Ends.
Industrial Control Systems
The PIC16C77T-20E/PT is well-suited to industrial control systems because its 14KB OTP program memory holds substantial state-machine logic and its 8-channel 8-bit ADC reads multiple sensor inputs simultaneously. The -40C to +125C enhanced temperature range tolerates factory-floor heat near motor cabinets. In a typical PLC-style digital I/O module the 33 I/O pins drive relays, optocouplers, and indicator LEDs directly, while the USART links to a master controller. The 20MHz clock executes deterministic scan loops within millisecond budgets, and the OTP non-volatile memory locks firmware to prevent field tampering with safety logic. Unlike flash parts the OTP cell is immune to radiation-induced bit flips in demanding industrial environments.
推荐
Automotive Body and Powertrain Modules
Automotive body controllers, instrument clusters, and powertrain peripherals benefit from the PIC16C77T-20E/PT because the OTP memory prevents firmware rollback attacks and the -40C to +125C range covers under-hood thermal stress. The 8-bit ADC monitors up to 8 analog sensors such as throttle position, coolant temperature, or battery voltage, while the PWM module drives actuators like idle-air control valves. The 20MHz instruction throughput sustains the 10ms typical automotive task cycle, and the 44-TQFP package offers a compact footprint for PCB-dense ECUs. OTP non-volatility also helps meet ISO 26262 requirements by guaranteeing firmware integrity after programming, a critical factor in functional-safety assessments.
推荐
Appliance Control Electronics
White-goods manufacturers choose the PIC16C77T-20E/PT for washing-machine, dishwasher, and refrigerator controllers because OTP memory locks the firmware at production, eliminating field-reprogramming costs and warranty risk. The 33 I/O lines interface with keypads, seven-segment displays, motor triac drivers, and temperature sensors, while the Capture/Compare/PWM peripheral generates timing-critical signals for universal-motor speed control. The enhanced -40C to +125C temperature grade handles compressor heat and freezer cold without thermal shutdown. The 14KB program memory accommodates complex wash-cycle algorithms and EEPROM emulation in flash-spare regions, while the 20MHz clock executes the main loop in well under 1ms for responsive user-interface updates.
推荐
Sensor Signal Conditioning and Data Acquisition
The PIC16C77T-20E/PT serves as a low-cost sensor hub in distributed data-acquisition systems, with its 8-channel ADC digitizing thermocouples, strain gauges, and process-variable transducers at the edge. The 368-byte RAM buffers 8-bit samples at up to the ADC's conversion rate, and the USART streams them to a host controller via RS-232 or RS-485 transceivers. The OTP memory ensures calibration coefficients stored in firmware cannot drift, which is essential in process-control and laboratory-instrument markets. The 20MHz instruction cycle sustains oversampling averaging loops for noise rejection, and the -40C to +125C range allows deployment near boilers, ovens, or outdoor process piping without thermal guarding.
推荐
Embedded Communication Bridges
The PIC16C77T-20E/PT is ideal as a serial-protocol bridge between incompatible industrial buses, leveraging its USART, SSP/SPI, and I2C peripherals simultaneously. In a typical application the USART connects to an RS-232 host, while the SPI bus drives an external EEPROM or ADC, and software bit-bangs a third protocol on general-purpose I/O. The 14KB OTP holds multi-protocol translation tables and the 368-byte RAM holds message buffers for sustained throughput. The 20MHz clock sustains real-time protocol translation without dropped characters, and OTP locking prevents accidental firmware swap that could corrupt bus traffic in safety-critical installations.
推荐
Motor Control Front-Ends
The PIC16C77T-20E/PT handles motor-control front-end tasks such as back-EMF sensing, current monitoring, and PWM generation for small DC and stepper drives. The 8-channel ADC samples phase currents and supply voltage, while the Capture/Compare/PWM module generates up to 10-bit PWM at 20kHz switching frequency. The 33 I/O pins drive gate-driver enable lines, fault inputs, and Hall-sensor feedback without external muxing. The -40C to +125C range tolerates heatsink-adjacent temperatures in integrated motor-drive assemblies, and OTP firmware ensures commutation algorithms cannot be corrupted by voltage transients on the DC bus, which is critical for industrial drives subject to IEC 61800 EMI immunity standards.
推荐
推荐产品汇总
工程参考数据： PIC16C77T-20E/PT ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PIC16C77-20I/PT | PIC16C77-10/PT | PIC16C77-04E/PT | PIC16C74B-20I/PT | PIC16F877A-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-TQFP (10x10) | 44-TQFP (10x10) | 44-TQFP (10x10) | 44-TQFP (10x10) | 44-TQFP (10x10) | 44-TQFP (10x10) |
| Core / Family | PIC16C / 8-bit | PIC16C / 8-bit | PIC16C / 8-bit | PIC16C / 8-bit | PIC16C / 8-bit | PIC16F / 8-bit flash |
| Program Memory | 14 KB OTP | 14 KB OTP | 14 KB OTP | 14 KB OTP | 4 KB OTP (-71%) | 14 KB flash (reprogrammable) |
| Maximum Clock | 20 MHz | 20 MHz | 10 MHz | 4 MHz | 20 MHz | 20 MHz |
| RAM Size | 368 bytes | 368 bytes | 368 bytes | 368 bytes | 192 bytes (-48%) | 368 bytes |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 |
| Temperature Range | -40C to +125C (Enhanced) | -40C to +85C (Industrial) | 0C to +70C (Commercial) | -40C to +125C (Enhanced) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
关键差异点
- OTP non-volatile program memory （对比 PIC16F877A-I/PT)
- Enhanced -40C to +125C temperature range （对比 PIC16C77-20I/PT)
- 20MHz clock versus 4MHz grade （对比 PIC16C77-04E/PT)
设计说明
The PIC16C77T-20E/PT operates at a nominal 5V supply (4.0V-6.0V per datasheet); place a 100nF decoupling capacitor within 5mm of each VDD/VSS pair (pins 11/12 and 31/32), and a bulk 10uF tantalum or ceramic on the main supply rail. Brown-out reset should be enabled in the configuration word to force a reset when VDD drops below approximately 4.0V, preventing code execution from corrupted memory during automotive load-dump transients.
Because the program memory is OTP (One-Time Programmable), firmware revisions are impossible after programming - any code bug becomes a production scrap issue. Always develop and debug on a flash-based PIC16F877A-I/PT (same 44-TQFP footprint) and migrate verified firmware to the OTP PIC16C77T-20E/PT only for production runs. Verify the configuration word (oscillator, watchdog, brown-out, code protect) on the prototype before locking the OTP mask. Configure MCLR# as a reset (not I/O) unless an external reset supervisor is used.
Place the 20MHz crystal or resonator within 10mm of OSC1 (pin 13) and OSC2 (pin 14) with short symmetrical traces and a guard ground to minimize EMI. Keep analog input traces (RA0-RA5, RE0-RE2) away from the USART pins (RC6/RC7) and PWM outputs (RC1/RC2) by at least 3mm to reduce ADC crosstalk. The 44-TQFP exposed thermal pad (if present per datasheet variant) should be soldered to a ground pour to lower thermal resistance and improve EMI performance in noisy automotive environments.
合规信息
Compliance flags not present in verified web data. The PIC16C7x family predates broad RoHS adoption; engineers should request the material declaration from Microchip before placing this part into a RoHS-bound production line.