PIC16C76-20I/SO - 8-bit 20MHz 14KB OTP MCU | Microchip | SOIC-28
MPN： PIC16C76-20I/SO ✗ 停產PIC16C76-20I/SO 概覽
A microcontroller (MCU) is a single-chip computer containing a processor core, non-volatile program memory, working RAM, and integrated peripherals such as timers, ADCs, and communication interfaces. The PIC16C76 sits within the broader hierarchy: microcontroller -> 8-bit MCU -> mid-range PIC16 family -> PIC16C7X sub-family. Unlike flash-based MCUs, OTP memory is programmed once via a device programmer and cannot be erased, which makes OTP parts economical for mature production runs where firmware is stable.
Key features include 35 single-word instructions, single-cycle execution except for program branches, a wide 2.5 V to 6.0 V operating voltage range, 25 mA source/sink per I/O, and very low standby current consumption (15 µA typical at 5 V/4 MHz, and 1 µA typical at 3 V/32 kHz). These characteristics suit battery-aware industrial and embedded designs.
Architecturally, the PIC16C76 uses a 14-bit instruction word with an 8-bit data path, a hardware multiplier is not present, and the Harvard bus keeps program and data memories separate for deterministic single-cycle instruction fetch. The integrated ADC samples at approximately 8-bit accuracy through a multiplexer shared with digital I/O.
Typical applications include industrial control nodes, sensor signal conditioning with on-chip ADC, motor drive PWM peripherals, and serial communication gateways. The combination of OTP memory and 20 MHz throughput also makes this part common in appliance controls, instrumentation, and aftermarket automotive modules operating in the industrial temperature window.
When designing with the PIC16C76-20I/SO, ensure that MCLR, OSC1, and OSC2 are configured according to the chosen oscillator mode and that the ADC reference voltage is well decoupled. Because the part is OTP, any firmware revision requires a new silicon, so production coding must be fully validated before programming.
This page synthesizes distributor pricing, same-package drop-in alternatives, and practical design notes not found on the manufacturer product page alone.
直接替換替代品，適用於 PIC16C76-20I/SO — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC16C76-20I/SO （相同外形與佔位） — 差異在於 Package, Timers, Serial Interfaces, Core Architecture, Program Memory Size.
PIC16F76-I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC16C76-20/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC16C76-20E/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC16C76-10I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC16C73B-20I/SO
✅ 直接替換📋 參考替代品（不在目錄中）
PIC16C73A-20I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC16C76-20I/SO 最大額定值與電氣特性
| Core | 8-bit PIC16 mid-range RISC |
| Program Memory | 14 KB OTP (8K x 14) |
| RAM | 368 bytes |
| Data EEPROM | Not present (OTP part) |
| Maximum CPU Frequency | 20 MHz |
| Instruction Word | 14-bit, 35 instructions, single-cycle |
| Operating Voltage | 2.5 V to 6.0 V |
| I/O Pins | 22 |
| ADC | 5 channels x 8-bit |
| Timers | 2 x 8-bit, 1 x 16-bit |
| CCP Modules | 2 (Capture / Compare / PWM) |
| Serial Interfaces | SSP (SPI / I2C), USART |
| I/O Source/Sink | 25 mA / 25 mA per pin |
| Standby Current | 15 uA typical at 5 V, 4 MHz; 1 uA typical at 3 V, 32 kHz |
| 工作溫度 | -40C to +85C (Industrial, 'I' suffix) |
| 封裝 | 28-pin SOIC (SO), 7.50 mm body width |
| 安裝類型 | Surface Mount |
PIC16C76-20I/SO 腳位配置
| 腳位 1 | MCLR/VPP — Master Clear (Reset) input or programming voltage |
| 腳位 2 | RA0/AN0 — Port A bit 0 / Analog input channel 0 |
| 腳位 3 | RA1/AN1 — Port A bit 1 / Analog input channel 1 |
| 腳位 4 | RA2/AN2 — Port A bit 2 / Analog input channel 2 |
| 腳位 5 | RA3/AN3/VREF — Port A bit 3 / Analog input channel 3 / ADC voltage reference |
| 腳位 6 | RA4/T0CKI — Port A bit 4 / Timer 0 clock input |
| 腳位 7 | RA5/AN4/SS — Port A bit 5 / Analog input channel 4 / SPI Slave Select |
| 腳位 8 | RE0/RD/AN5 — Port E bit 0 / Parallel slave port read / Analog input channel 5 |
| 腳位 9 | RE1/WR/AN6 — Port E bit 1 / Parallel slave port write / Analog input channel 6 |
| 腳位 10 | RE2/CS/AN7 — Port E bit 2 / Parallel slave port chip select / Analog input channel 7 |
| 腳位 11 | OSC1/CLKIN — Oscillator input / external clock input |
| 腳位 12 | OSC2/CLKOUT — Oscillator output / clock output |
| 腳位 13 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer 1 oscillator output / Timer 1 clock input |
| 腳位 14 | RC1/T1OSI/CCP2 — Port C bit 1 / Timer 1 oscillator input / CCP2 input/output |
| 腳位 15 | RC2/CCP1 — Port C bit 2 / CCP1 input/output |
| 腳位 16 | RC3/SCK/SCL — Port C bit 3 / SPI clock / I2C clock |
| 腳位 17 | RC4/SDI/SDA — Port C bit 4 / SPI data in / I2C data |
| 腳位 18 | RC5/SDO — Port C bit 5 / SPI data out |
| 腳位 19 | RC6/TX/CK — Port C bit 6 / USART TX / USART clock |
| 腳位 20 | RC7/RX/DT — Port C bit 7 / USART RX / USART data |
| 腳位 21 | GND/VSS — Ground reference |
| 腳位 22 | VDD — Positive power supply (2.5 V to 6.0 V) |
| 腳位 23 | RB0/INT — Port B bit 0 / External interrupt input |
| 腳位 24 | RB1 — Port B bit 1 |
| 腳位 25 | RB2 — Port B bit 2 |
| 腳位 26 | RB3 — Port B bit 3 |
| 腳位 27 | RB4 — Port B bit 4 |
| 腳位 28 | RB5 — Port B bit 5 |
典型應用
PIC16C76-20I/SO 適用於 6 應用s: Industrial Sensor Monitoring, HVAC Appliance Control, Serial Communication Gateway, Motor Control and PWM Drive, Battery-Powered Remote Sensor, Automotive Aftermarket Modules.
Industrial Sensor Monitoring
The PIC16C76-20I/SO's 5-channel 8-bit ADC and industrial -40C to +85C temperature range make it well-suited to multi-sensor monitoring nodes on factory floors. Each ADC channel can sample a 0-5 V transducer signal with 8-bit resolution (approximately 19.5 mV per LSB at 5 V VREF), while the 368-byte RAM buffer supports moving-average filtering before UART uplink. The 20 MHz CPU executes the ADC ISR plus averaging in well under 1 ms, leaving bandwidth for SPI communication to a wireless module or local display. The wide 2.5 V to 6.0 V supply range accepts unregulated 5 V industrial rails directly, eliminating the need for an additional LDO. Engineers typically pair this MCU with external 4-20 mA current-loop drivers or thermocouple amplifiers for legacy sensor replacement.
推薦
HVAC Appliance Control
White-goods and HVAC controllers favor the PIC16C76-20I/SO for its 25 mA per-pin source/sink drive, dual CCP/PWM modules, and 22 I/O sufficient to drive relays, triacs, and seven-segment displays without external buffers. PWM outputs at 20 MHz CPU can generate 10-bit resolution control signals for variable-speed fan motors or proportional valves, while the USART supports Modbus RTU communication to building-management systems. The industrial temperature window handles attic and boiler-room environments. OTP memory locks the firmware against tampering or accidental field corruption. The 28-pin SOIC package offers a compact footprint for control boards where PCB area is constrained by mechanical packaging.
推薦
Serial Communication Gateway
With both a USART and an SSP (SPI or I2C) on-chip, the PIC16C76-20I/SO bridges legacy RS-232/RS-485 equipment to SPI sensors or I2C peripherals in protocol-converter designs. The USART supports hardware baud rates up to several hundred kbps with auto-address detection for RS-485 multi-drop networks, while the SSP can simultaneously interface an EEPROM, RTC, or sensor front-end. 368 bytes of RAM are sufficient for small protocol translation buffers. The 20 MHz clock keeps latency low enough for real-time Modbus or DMX512 forwarding. The 2.5 V to 6.0 V supply range allows direct connection to 3.3 V or 5 V bus rails with no level translation needed for the MCU core.
推薦
Motor Control and PWM Drive
Two independent Capture/Compare/PWM (CCP) modules on the PIC16C76-20I/SO can generate complementary PWM signals for brushed DC, stepper, or single-phase BLDC motor control at switching frequencies up to approximately 20 kHz with 10-bit duty resolution. The 22 I/O include enough pins for direction control, brake input, current-sense comparator input, and fault interrupts. At 20 MHz the MCU can sample current feedback and update PWM duty in a single 200 ns instruction cycle, achieving sub-microsecond loop times for high-dynamic-response drives. OTP memory secures the proprietary motor-control algorithms from extraction. Industrial temperature grade suits under-hood or cabinet-mounted motor drives.
推薦
Battery-Powered Remote Sensor
The PIC16C76-20I/SO's low standby current of 1 uA typical at 3 V/32 kHz makes it attractive for battery-powered remote sensor nodes that wake periodically, take an ADC reading, transmit via the USART or SSP, and return to sleep. Operating from a 3 V coin cell or two AA batteries, the wide 2.5 V to 6.0 V supply window accommodates battery droop over discharge life. The 14 KB OTP holds the full application code for sensor calibration, sleep scheduling, and a small protocol stack. The industrial temperature range allows outdoor or attic deployment. Engineers use the Watchdog Timer and ultra-low-power SLEEP mode to extend battery life to multi-year durations in metering applications.
推薦
Automotive Aftermarket Modules
Although not AEC-Q100 qualified, the PIC16C76-20I/SO with its industrial -40C to +85C range is widely deployed in aftermarket automotive accessories: alarm systems, remote-start modules, gauge drivers, and CAN-bus-to-analog gateways. The 5-channel ADC reads sensor inputs (temperature, fuel level, voltage), while the USART interfaces to OBD-II diagnostic tools at 9600 to 57600 baud. Two PWM channels drive indicator LEDs or small solenoids. The 28-SOIC package fits inside sealed plastic enclosures common to under-dash modules. OTP memory secures the proprietary protocol stacks and prevents unauthorized firmware cloning. Designers should add external transient protection (TVS diodes) for 12 V load-dump immunity.
推薦
推薦產品摘要
工程參考資料，適用於 PIC16C76-20I/SO — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC16F76-I/SO | PIC16C76-20/SO | PIC16C76-20E/SO | PIC16C76-10I/SO | PIC16C73B-20I/SO |
|---|---|---|---|---|---|---|
| Package | 28-pin SOIC | 28-pin SOIC (same) | 28-pin SOIC (same) | 28-pin SOIC (same) | 28-pin SOIC (same) | 28-pin SOIC (same) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 14 KB OTP | 14 KB Flash | 14 KB OTP | 14 KB OTP | 14 KB OTP | 4 KB OTP |
| Memory Type | OTP EPROM | Flash (re-programmable) | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM |
| Max Clock | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 10 MHz | 20 MHz |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | 0C to +70C (Commercial) | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| RAM | 368 bytes | 368 bytes | 368 bytes | 368 bytes | 368 bytes | 192 bytes |
| ADC | 5 ch x 8-bit | 5 ch x 8-bit | 5 ch x 8-bit | 5 ch x 8-bit | 5 ch x 8-bit | 5 ch x 8-bit |
| I/O Pins | 22 | 22 | 22 | 22 | 22 | 22 |
主要差異化特點
- Flash upgrade path with identical pinout (對比PIC16F76-I/SO)
- Extended temperature range option (對比PIC16C76-20/SO)
- Highest memory density in PIC16C7X family (對比PIC16C73B-20I/SO)
設計說明
Estimated: at VDD = 5 V and 20 MHz clock, the PIC16C76-20I/SO draws approximately 10-15 mA active and 1-15 uA in SLEEP mode (datasheet figure: 15 uA typical at 5 V/4 MHz, 1 uA at 3 V/32 kHz). For battery-powered designs, switch to the 32 kHz LP oscillator before SLEEP and gate peripheral power with a load-switch FET. Add a 100 nF decoupling cap within 5 mm of VDD and a 10 uF bulk cap on the supply rail. Brown-out detection should be enabled in the configuration word to prevent code corruption during supply droop.
Because the PIC16C76-20I/SO is an OTP part, firmware bugs discovered after programming cannot be corrected - the silicon must be discarded. Mitigate this by programming pre-production units with windowed EPROM versions (PIC16C76-20/JW) during development, then switching to OTP SOIC for volume production. Also ensure MCLR is pulled high through a 10 kohm resistor and that the ICSP programming clock (PGC) and data (PGD) lines have no series resistance above 470 ohm, or programming will fail intermittently.
Route the crystal or resonator traces (OSC1/OSC2) on the top layer with a ground guard ring and keep them under 10 mm. Place the crystal within 5 mm of the MCU. For ADC accuracy, dedicate a separate analog ground island tied to the MCU GND pin at a single point; route ADC analog inputs away from PWM and switching traces. The 28-pin SOIC has adequate thermal performance at industrial temperatures, but for continuous high-current GPIO drive (25 mA per pin, 8 pins simultaneously = 200 mA), consider copper-pour cooling on the package lands.
合規資訊
RoHS and REACH compliance status not explicitly stated in the verified web data for this specific MPN - confirmed [DATA_NEEDED] in specs. PIC16C76-20I/SO is industrial-temp but NOT AEC-Q100 qualified; not recommended for safety-critical automotive designs. For automotive applications use AEC-Q100 qualified equivalents or external qualification testing.
