PIC16C774-E/PT - 8-bit MCU 7KB OTP 33 I/O 12-bit ADC | Microchip
MPN: PIC16C774-E/PT ✓ Hoạt độngPIC16C774-E/PT Tóm tắt
An 8-bit microcontroller (MCU) is a small, low-cost computer-on-a-chip that integrates a CPU, memory (ROM/RAM), and peripherals on a single silicon die. 8-bit MCUs sit at the entry tier of the microcontroller taxonomy: 8-bit microcontroller -> microcontroller -> embedded processor -> semiconductor device. They excel in deterministic, bit-level control tasks and remain widely deployed where cost, simplicity, and real-time responsiveness outweigh the throughput demands satisfied by 32-bit cores. The PIC16C774 series belongs to Microchip's mid-range PIC16 family, which uses a 14-bit instruction word and Harvard architecture.
Key features of the PIC16C774-E/PT include the 10-channel 12-bit ADC with up to 12 input channels (some shared with digital I/O), two 8-bit timers plus one 16-bit timer, a Universal Synchronous Asynchronous Receiver Transmitter (USART), a Synchronous Serial Port (SSP) supporting SPI and I²C, and a Capture/Compare/PWM (CCP) module. The device supports up to 20 MHz oscillator input and a 5 MIPS instruction throughput. Brown-out Reset (BOR), Power-on Reset (POR), and a Watchdog Timer with its own on-chip RC oscillator provide robust field reliability.
Architecturally, the PIC16C774 pairs a Harvard bus with a 14-bit-wide program memory path and an 8-bit data path, which keeps the instruction fetch and execution overlapping for predictable 200 ns cycle times at 20 MHz. The OTP memory allows one-time factory or in-circuit programming of code and constants, making the part well-suited to low-to-medium volume production runs where mask-ROM economics are unfavorable. The 12-bit ADC uses a successive-approximation register with sample-and-hold, and dedicated analog inputs can be multiplexed across the 33 I/O pins.
Typical applications include industrial process control loops, sensor signal conditioning, motor control front-ends, instrumentation data acquisition, automotive body electronics, and embedded control subsystems in medical and consumer appliances. The wide temperature range and 12-bit ADC precision particularly suit battery monitoring, multi-channel temperature scanning, and closed-loop analog control. In automotive body controllers, the same ADC bandwidth plus the USART links cleanly to LIN-based communication transceivers.
When designing with the PIC16C774-E/PT, observe the absolute maximum VDD of 7.5V and decouple VDD with a 0.1 µF ceramic capacitor placed within 5 mm of the supply pin. Configure unused I/O as outputs and tie them to ground to minimize ADC noise injection. The MCLR pin should be tied through a 10 kΩ pull-up to VDD, with a 100 nF cap to ground for ESD hardening. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes not found in the bare manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC16C774-E/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 PIC16C774-E/PT (cùng hình factor và footprint) — khác nhau ở Package, Operating Temperature, Timers, Mounting Type, Program Memory Size.
PIC16C774-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C774-E/PQ
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Xem tài liệu →PIC16C774/JW
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Xem tài liệu →PIC16C765-I/P
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C774-E/PT Tỷ lệ tối đa & tính chất điện
| Product Type | 8-bit RISC Microcontroller (MCU) |
| Program Memory Size | 7 KB OTP |
| RAM Size | 256 bytes |
| Number of I/O Pins | 33 |
| ADC Resolution | 12-bit |
| ADC Channels | 10 |
| Maximum CPU Frequency | 20 MHz |
| Instruction Throughput | 5 MIPS |
| Supply Voltage (VDD) | 2.5 V to 5.5 V |
| Nhiệt độ hoạt động | -40 °C to +125 °C (Extended, -E grade) |
| Hộp | 44-pin TQFP (PT) |
| Kiểu lắp đặt | Surface Mount |
| Timers | 2 × 8-bit + 1 × 16-bit |
| Communication Interfaces | USART (SCI), SSP (SPI / I²C) |
| CCP Modules | 1 (Capture / Compare / PWM) |
| Reset / Protection | POR, BOR, Watchdog Timer with dedicated oscillator |
| Instruction Set Architecture | PIC16 mid-range, 14-bit instruction word, Harvard |
| Terminal Form | Gull Wing |
| Package Code | TQFP |
Cấu hình chân PIC16C774-E/PT
| Chân 1 | MCLRbar/VPP — Master Clear (Reset) input / Programming voltage |
| Chân 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| Chân 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| Chân 4 | RA2/AN2 — PORTA bit 2 / Analog input 2 |
| Chân 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / ADC VREF+ |
| Chân 6 | RA4/AN4/T0CKI — PORTA bit 4 / Analog input 4 / Timer0 clock |
| Chân 7 | RA5/AN5/SSbar — PORTA bit 5 / Analog input 5 / SPI Slave Select |
| Chân 8 | AVSS — Analog ground |
| Chân 9 | AVDD — Analog positive supply |
| Chân 10 | VSS — Digital ground |
| Chân 11 | VDD — Digital positive supply |
| Chân 12 | OSC1/CLKI — Crystal oscillator input / external clock |
| Chân 13 | OSC2/CLKO — Crystal oscillator output |
| Chân 14 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock |
| Chân 15 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| Chân 16 | RC2/CCP1 — PORTC bit 2 / Capture Compare PWM 1 |
| Chân 17 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I²C clock |
| Chân 18 | RD0 — PORTD bit 0 |
| Chân 19 | RD1 — PORTD bit 1 |
| Chân 20 | RD2 — PORTD bit 2 |
| Chân 21 | RD3 — PORTD bit 3 |
| Chân 22 | RD4 — PORTD bit 4 |
| Chân 23 | RD5 — PORTD bit 5 |
| Chân 24 | RD6 — PORTD bit 6 |
| Chân 25 | RD7 — PORTD bit 7 |
| Chân 26 | VSS — Digital ground |
| Chân 27 | VDD — Digital positive supply |
| Chân 28 | RB0/INT — PORTB bit 0 / External interrupt |
| Chân 29 | RB1 — PORTB bit 1 |
| Chân 30 | RB2 — PORTB bit 2 |
| Chân 31 | RB3 — PORTB bit 3 |
| Chân 32 | RB4 — PORTB bit 4 |
| Chân 33 | RB5 — PORTB bit 5 |
| Chân 34 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Chân 35 | RB7/PGD — PORTB bit 7 / ICSP data |
| Chân 36 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I²C data |
| Chân 37 | RC5/SDO — PORTC bit 5 / SPI data out |
| Chân 38 | RC6/TX/CK — PORTC bit 6 / USART TX / clock |
| Chân 39 | RC7/RX/DT — PORTC bit 7 / USART RX / data |
| Chân 40 | RE0/AN6 — PORTE bit 0 / Analog input 6 |
| Chân 41 | RE1/AN7 — PORTE bit 1 / Analog input 7 |
| Chân 42 | RE2/AN8/CS — PORTE bit 2 / Analog input 8 / Chip Select |
| Chân 43 | VDD — Digital positive supply |
| Chân 44 | VSS — Digital ground |
Ứng dụng tiêu biểu
PIC16C774-E/PT phù hợp cho 7 Áp dụngs: Industrial Process Control, Multi-Channel Temperature Monitoring, Automotive Body Electronics, Battery Management Front-End, Sensor Hub and Data Acquisition, Medical Instrumentation Front-End, Embedded Control Subsystems in Consumer Appliances.
Industrial Process Control
The PIC16C774-E/PT is well-suited to industrial process-control loops where a closed-loop analog sensor (4-20 mA or 0-10 V) must be digitized for PID control of valves, pumps, or heaters. Its 12-bit ADC gives 4096 codes across a 0-5 V input, which yields roughly 1.2 mV LSB — enough resolution to detect sub-degree temperature drift on a Type K thermocouple amplifier. The 10 ADC channels allow multi-zone scanning of a single PLC front-end. The -E grade operating range of -40 °C to +125 °C supports cabinet-mounted or field-mounted industrial nodes without derating. Engineers typically pair the device with a 4N35 optocoupler on each digital output to provide 5 kV isolation from the mains-driven actuator. The 5 MIPS throughput and 14-bit instruction word keep PID math under 200 µs per loop, leaving headroom for housekeeping tasks such as EEPROM logging or HMI updates over RS-485 via the USART. Designed with the standard PIC16 mid-range peripheral set, it is firmware-compatible with the broader PIC16F87x family, easing migration if flash reprogrammability later becomes a requirement.
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Multi-Channel Temperature Monitoring
The PIC16C774-E/PT's 10-channel 12-bit ADC natively supports thermistor or RTD bridge scanning for HVAC, refrigeration, and battery-pack monitoring. At a 5 V reference and 12-bit resolution, the ADC delivers ~1.2 mV per LSB, which after a unity-gain thermistor divider yields better than 0.1 °C temperature resolution when paired with 10 kΩ NTC sensors. The 33 I/O pins let the MCU scan up to 10 analog zones while still driving status LEDs, I²C displays, and a UART link to a host controller. The extended -40 °C to +125 °C temperature grade matches automotive under-hood and industrial cold-storage envelopes without additional thermal screening. The ADC's acquisition time of approximately 19.7 µs at 20 MHz allows the entire 10-channel sweep to complete in well under 1 ms, leaving ample CPU time for moving-average filtering or alarm threshold checking. Designers typically add a 10 µF bulk + 0.1 µF ceramic bypass on AVDD to keep ADC readings stable in electrically noisy industrial cabinets.
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Automotive Body Electronics
The PIC16C774-E/PT's extended -40 °C to +125 °C operating range and 12-bit ADC make it a candidate for automotive body controllers, where it can read multiple sensor inputs (coolant, oil, ambient light, battery voltage) while driving PWM-controlled loads such as interior dimming or HVAC blend doors. With 33 I/O pins and a 5 MIPS CPU, the MCU can serve as a sub-node on a LIN or CAN bus, offloading simple control tasks from the central body control module. The USART links directly to a TJA1027 LIN transceiver or MCP2515 CAN controller with minimal glue logic. The 44-pin TQFP package is automotive-qualified in many Microchip part variants, though for full AEC-Q100 compliance a Q-grade suffix part is recommended. The OTP program memory protects against unauthorized firmware modification in field-deployed ECUs, an important consideration in automotive security. The Brown-out Reset and Watchdog Timer provide robust fault recovery on noisy 12 V vehicle buses when paired with a TVS-protected supply rail.
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Battery Management Front-End
In multi-cell battery management systems, the PIC16C774-E/PT can digitize individual cell voltages through a resistive divider ladder, providing per-cell state-of-charge telemetry to a host BMS controller. Its 12-bit ADC resolves 4.2 V lithium cell voltage into 1024 levels, giving roughly 4 mV resolution per cell — sufficient for coulomb-counting refinement and over-voltage detection. The 10 ADC channels handle a 7S to 10S battery pack on a single MCU, while the CCP module can drive cell-balancing MOSFETs via PWM duty-cycle control. The 2.5 V to 5.5 V supply range is well-matched to single-cell Li-ion derived rails after a low-dropout regulator. Brown-out Reset ensures clean restart after deep discharge events, and the Watchdog Timer recovers from software lock-ups caused by ESD or load-dump transients on the battery cable. For higher cell counts, multiple PIC16C774-E/PT nodes can be daisy-chained through the SSP port, scaling to 13S, 16S, or larger packs with minimal firmware effort.
Được đề xuất
Sensor Hub and Data Acquisition
The PIC16C774-E/PT serves as a cost-effective sensor hub for factory-floor data acquisition nodes that aggregate 8-10 analog inputs and forward them over RS-485 or USB to a central SCADA server. The 12-bit ADC, sample-and-hold, and 33 I/O lines accommodate strain gauges, pressure transducers, flow meters, and 4-20 mA loop-powered sensors simultaneously. With the USART configured for RS-485, multi-drop addressing allows 32 nodes per bus using the standard Modbus RTU protocol. The 5 MIPS CPU executes a full 10-channel scan plus moving-average filter in well under 5 ms, lagging the typical 100 ms SCADA poll cycle by a comfortable margin. The 256-byte RAM is sufficient for input buffering and protocol state, and the 7 KB OTP holds the full Modbus stack plus application logic. The -40 °C to +125 °C temperature grade supports both indoor panel-mount and outdoor NEMA 4 enclosures with the same BOM.
Được đề xuất
Medical Instrumentation Front-End
Although not a safety-critical medical MCU, the PIC16C774-E/PT is widely used in non-invasive medical instrument front-ends such as patient-side thermometry arrays, infusion pump auxiliary monitors, and laboratory spectrophotometers. Its 12-bit ADC provides enough resolution to digitize photodiode or thermopile outputs from low-level analog front-ends after a low-noise op-amp such as the MCP6002. The USART or SSP can stream digitized data to a higher-performance host processor that handles UI and connectivity. The OTP program memory ensures that clinical calibration constants and proprietary algorithms are locked at production time and cannot be field-tampered with. The 33 I/O pins comfortably drive a 4×4 keypad, an LCD interface, and several alarm outputs. Designers should add appropriate isolation barriers (e.g. ADuM1411) between the PIC16C774-E/PT and any mains-powered circuitry to meet IEC 60601 patient leakage requirements.
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Embedded Control Subsystems in Consumer Appliances
The PIC16C774-E/PT is a strong fit for the control subsystems of consumer appliances such as coffee machines, induction cooktops, and washing-machine sub-modules, where one MCU handles multiple analog sensor inputs (NTC temperature, water level, motor current sense) and several PWM or relay-driven loads. The 12-bit ADC delivers precise temperature readings from 100 kΩ NTC dividers, and the CCP module generates the PWM signals required for triac-fired heater elements or variable-frequency inverter control. The 33 I/O lines can drive a 7-segment display, capacitive touch buttons, and a buzzer simultaneously. The OTP memory locks the appliance firmware to a known version, deterring aftermarket tampering. For cost-sensitive consumer runs the 44-pin TQFP package footprints cleanly with Microchip's other mid-range parts, allowing single PCB layout reuse across multiple appliance variants.
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Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C774-E/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 | PIC16C774-I/PT | PIC16C774-E/PQ | PIC16C774-I/PQ | PIC16C774/JW |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin TQFP (PT) | 44-pin TQFP (PT) | 44-pin MQFP (PQ) | 44-pin MQFP (PQ) | 44-pin TQFP (windowed ceramic) |
| Program Memory | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB UV-EPROM (windowed) |
| RAM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| ADC Resolution | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit |
| Maximum CPU Frequency | 20 MHz / 5 MIPS | 20 MHz / 5 MIPS | 20 MHz / 5 MIPS | 20 MHz / 5 MIPS | 20 MHz / 5 MIPS |
| Operating Temperature | -40 °C to +125 °C (E grade) | -40 °C to +85 °C (I grade) | -40 °C to +125 °C (E grade) | -40 °C to +85 °C (I grade) | 0 °C to +70 °C (development) |
| Supply Voltage | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V |
| I/O Pins | 33 | 33 | 33 | 33 | 33 |
| Reprogrammability | OTP (one-time) | OTP (one-time) | OTP (one-time) | OTP (one-time) | UV-erasable (windowed) |
Bảo phân biệt quan trọng
- 12-bit ADC versus the 10-bit ADC of the PIC16F877A family (vsPIC16F877A-I/PT)
- Extended -E temperature grade versus the industrial -I grade (vsPIC16C774-I/PT)
- OTP code protection versus flash reprogrammability (vsPIC16F874A-I/PT)
Ghi chú thiết kế
Estimated: at 20 MHz / 5 MIPS operation from 5 V supply, the PIC16C774-E/PT draws roughly 5-8 mA active and 1-5 µA in sleep mode. Decouple each VDD pin (11, 27, 43) with a 100 nF ceramic capacitor placed within 5 mm of the pin, and add a 10 µF bulk tantalum or aluminum electrolytic near the highest-current VDD pin. Keep analog VDD separate from digital VDD at the IC by using a ferrite bead or 10 Ω resistor to isolate AVDD noise from the digital core. Source: PIC16C774 datasheet, electrical characteristics section.
Route the crystal traces (OSC1/OSC2, pins 12-13) as short as possible and surround them with a ground pour to minimize EMI pickup. Place the crystal load capacitors (typically 15-22 pF for an HS-mode crystal) within 2 mm of the OSC pins. Route analog input traces away from digital switching lines such as PWM outputs to avoid ADC crosstalk. Add a guard ring connected to analog ground around the analog input pins to shunt leakage currents away from high-impedance sensor nodes.
Do not exceed 5.5 V on VDD or apply voltage to any pin before VDD is stable, as the PIC16C774-E/PT has no internal power-on clamping on digital I/O. Always configure unused I/O as outputs and tie them to ground to minimize ADC input leakage (typical OFF-leakage is 1 µA which becomes significant for 1 MΩ source impedances). When using the ADC, ensure Aquisition time is at least 19.7 µs and add a 100 nF bypass cap directly on the VREF+ pin if used. Avoid leaving the MCLRbar pin floating - tie it to VDD through a 10 kΩ pull-up with a 100 nF cap to ground for ESD hardening.
Keep ICSP programming lines (PGC/RB6, PGD/RB7) free of series resistance greater than 100 Ω, and do not place capacitors on these pins as they can interfere with in-circuit programming. If isolation is required for production, use a dedicated programming header or test-pad access. Reserve a ground pad beneath the TQFP thermal pad (if applicable for this variant) and connect it to the ground plane with multiple vias to provide a low-impedance return path for switching currents.
Thông tin tuân thủ
RoHS and lead-free status not stated in the verified web data; -G ordering suffix typically designates Pb-free finish for Microchip parts but full RoHS compliance should be confirmed via manufacturer declaration. Not AEC-Q100 qualified; for automotive applications request Q-grade parts from Microchip directly.