PIC16LC774T-I/PQ - 8-bit 20MHz 7KB OTP MCU 33 I/O | Microchip
MPN: PIC16LC774T-I/PQ ✗ Cuối đờiPIC16LC774T-I/PQ Tóm tắt
What is a PIC16C/LC microcontroller? A PIC16 microcontroller is a Harvard-architecture 8-bit RISC MCU built around the PIC16 CPU core. Its program memory bus and data memory bus are physically separated, allowing the instruction fetch and the data read/write to occur in parallel within a single instruction cycle. PIC16 devices target low-power, deterministic, real-time embedded control tasks and sit inside a taxonomy of PIC microcontrollers -> 8-bit Microcontrollers -> Microcontrollers -> Integrated Circuits. The 'LC' subfamily uses CMOS process technology optimized for low quiescent current draw, while the 'C' suffix indicates the use of One-Time-Programmable EPROM rather than flash.
The PIC16LC774T-I/PQ executes most instructions in a single 200 ns cycle (at 20 MHz), with only program branches requiring two cycles, and provides 35 single-word instructions to learn. Peripherals integrated on-die include a 12-bit ADC, two analog comparators, a synchronous serial port (SSP) configurable as SPI or I2C, a USART with addressable mode, a Capture/Compare/PWM (CCP) module, an 8-bit parallel slave port, and a watchdog timer with on-chip RC oscillator.
Typical applications include industrial sensor conditioning, motor control loops, instrumentation front-ends, and portable battery-powered devices. The wide operating voltage (2.5V to 5.5V) and low-power LC design make it a fit for handheld and remote sensor nodes where quiescent current dominates runtime budget.
When designing with the PIC16LC774T-I/PQ, ensure the MCLR/Vpp reset circuit follows Microchip's recommended RC network to guarantee clean startup, and place a 0.1 uF decoupling capacitor within 5 mm of the VDD/VSS pins. Because the program memory is OTP, firmware must be fully validated before programming - field firmware updates require a different (flash) part such as PIC16F877.
This page synthesizes distributor pricing snapshots, drop-in alternative MPNs, and application design guidance that goes beyond what is available in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho PIC16LC774T-I/PQ — 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 PIC16LC774T-I/PQ (cùng hình factor và footprint) — khác nhau ở ADC, Mounting Type, Package, Program Memory Size, Core.
PIC16C774T-I/PQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC774T-04I/PQ
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LC774-I/PQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC74BT-04I/PQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC65B-04/PQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC774T-I/PQ Tỷ lệ tối đa & tính chất điện
| Core | PIC16C (8-bit RISC, Harvard) |
| Instruction Set | 35 single-word instructions |
| Program Memory | 7 KB (4K x 14) OTP |
| Data RAM | 256 bytes |
| Data EEPROM | Not present on this OTP variant |
| Tần số xung maksimum | 20 MHz |
| Instruction Throughput | 200 ns instruction cycle (5 MIPS per MHz) |
| Operating Voltage (Vdd) | 2.5 V to 5.5 V |
| I/O Pins | 33 digital I/O |
| Timers | Timer0 (8-bit), Timer1 (16-bit), Timer2 (8-bit with PWM) |
| ADC | 12-bit, up to 8 channels |
| Analog Comparators | 2 on-chip comparators |
| Serial Interfaces | 1x USART (SCI), 1x SSP (SPI / I2C master-slave) |
| Capture/Compare/PWM | 1x CCP module |
| Parallel Slave Port | 8-bit PSP on PORTD/PORTE |
| Watchdog Timer | Yes, with on-chip RC oscillator |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial, 'I' suffix) |
| Hộp | 44-pin MQFP (PQ) 10x10 mm |
| Kiểu lắp đặt | Surface Mount, Tape & Reel |
| Process Technology | CMOS, low-power 'LC' family |
Cấu hình chân PIC16LC774T-I/PQ
| Chân 1 | MCLR/Vpp/RA5 — Master Clear reset / programming voltage / PORTA bit 5 (input only) |
| Chân 2 | RA0/AN0 — PORTA bit 0 / ADC analog input channel 0 |
| Chân 3 | RA1/AN1 — PORTA bit 1 / ADC analog input channel 1 |
| Chân 4 | RA2/AN2/Vref- — PORTA bit 2 / ADC analog input channel 2 / ADC negative reference |
| Chân 5 | RA3/AN3/Vref+ — PORTA bit 3 / ADC analog input channel 3 / ADC positive reference |
| Chân 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input (open-drain output) |
| Chân 7 | RA5/SS/AN4 — PORTA bit 5 / SPI Slave Select / ADC channel 4 |
| Chân 8 | AVss — Analog ground reference |
| Chân 9 | AVdd — Analog positive supply (2.5V to 5.5V) |
| Chân 10 | OSC1/CLKI — Oscillator crystal input / external clock input |
| Chân 11 | OSC2/CLKO — Oscillator crystal output / clock output (Fosc/4) |
| Chân 12 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Chân 13 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 PWM output |
| Chân 14 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM channel 1 |
| Chân 15 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Chân 16 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Chân 17 | RC5/SDO — PORTC bit 5 / SPI data out |
| Chân 18 | RC6/TX/CK — PORTC bit 6 / USART transmit / USART clock |
| Chân 19 | RC7/RX/DT — PORTC bit 7 / USART receive / USART data |
| Chân 20 | Vss — Digital ground |
| Chân 21 | Vdd — Digital positive supply (2.5V to 5.5V) |
| Chân 22 | RB0/INT — PORTB bit 0 / external interrupt input |
| Chân 23 | RB1 — PORTB bit 1 |
| Chân 24 | RB2 — PORTB bit 2 |
| Chân 25 | RB3 — PORTB bit 3 |
| Chân 26 | RB4 — PORTB bit 4 |
| Chân 27 | RB5 — PORTB bit 5 |
| Chân 28 | RB6/PGC — PORTB bit 6 / ICSP clock (programming/debug) |
| Chân 29 | RB7/PGD — PORTB bit 7 / ICSP data (programming/debug) |
| Chân 30 | RD0/PSP0 — PORTD bit 0 / Parallel Slave Port bit 0 |
| Chân 31 | RD1/PSP1 — PORTD bit 1 / Parallel Slave Port bit 1 |
| Chân 32 | RD2/PSP2 — PORTD bit 2 / Parallel Slave Port bit 2 |
| Chân 33 | RD3/PSP3 — PORTD bit 3 / Parallel Slave Port bit 3 |
| Chân 34 | RD4/PSP4 — PORTD bit 4 / Parallel Slave Port bit 4 |
| Chân 35 | RD5/PSP5 — PORTD bit 5 / Parallel Slave Port bit 5 |
| Chân 36 | RD6/PSP6 — PORTD bit 6 / Parallel Slave Port bit 6 |
| Chân 37 | RD7/PSP7 — PORTD bit 7 / Parallel Slave Port bit 7 |
| Chân 38 | Vss — Digital ground (second Vss pin) |
| Chân 39 | Vdd — Digital positive supply (second Vdd pin) |
| Chân 40 | RE0/RD/AN5 — PORTE bit 0 / Parallel Slave Port read control / ADC channel 5 |
| Chân 41 | RE1/WR/AN6 — PORTE bit 1 / Parallel Slave Port write control / ADC channel 6 |
| Chân 42 | RE2/CS/AN7 — PORTE bit 2 / Parallel Slave Port chip select / ADC channel 7 |
| Chân 43 | C1OUT — Comparator 1 output (note: package-dependent; verify against datasheet 30292D) |
| Chân 44 | C2OUT — Comparator 2 output (note: package-dependent; verify against datasheet 30292D) |
Ứng dụng tiêu biểu
PIC16LC774T-I/PQ phù hợp cho 6 Áp dụngs: Industrial Sensor Conditioning & Signal Acquisition, Battery-Powered Portable Handheld Devices, Stepper Motor and DC Motor Control Loops, Embedded Instrumentation and Data Loggers, Automotive Body Electronics (Non-Safety Subsystems), Home Appliance Control Boards.
Industrial Sensor Conditioning & Signal Acquisition
The PIC16LC774T-I/PQ's 12-bit ADC with up to 8 input channels and 2 on-chip analog comparators makes it well-suited to multi-channel industrial sensor acquisition boards, where 5V sensor rails and industrial -40C to +85C operating temperature are mandatory. Its 33 I/O lines allow direct connection to multiplexed sensor arrays, mechanical switches, and status LEDs without external glue logic. At 20 MHz the MCU can sample at the ADC's maximum 100 kSPS rate while servicing background sensor linearization tasks. Designers should reserve one of the two analog comparators as a watchdog overcurrent detector and use the USART to forward conditioned values to a host PLC.
Được đề xuất
Battery-Powered Portable Handheld Devices
The 'LC' low-power CMOS process gives the PIC16LC774T-I/PQ a typical quiescent current in the microamp range, suiting 2.5V-5.5V battery-powered handheld terminals, remote controllers, and metering instruments. Its 33 I/O pins can drive a segmented LCD via external charge-pump circuitry, scan a keypad matrix, and wake up periodically via the watchdog timer. The OTP program memory is acceptable for finished consumer SKUs where no field firmware update is required. Use sleep mode between user interactions to extend coin-cell or 2xAA battery life into months of operation.
Được đề xuất
Stepper Motor and DC Motor Control Loops
With its Capture/Compare/PWM (CCP) module and Timer2 PWM base, the PIC16LC774T-I/PQ can generate up to 10-bit PWM signals for brushed DC motor speed control or stepper motor drive sequencing, while the 12-bit ADC reads back tachogenerator or current-sense feedback. The 33 I/O lines accept multiple Hall-effect sensor inputs and quadrature encoder feedback. Industrial -40C to +85C range tolerates motor bay ambient temperatures. For closed-loop control, pair with a Microchip TC4420 MOSFET driver and add optocoupler isolation between the MCU and the H-bridge power stage.
Được đề xuất
Embedded Instrumentation and Data Loggers
The PIC16LC774T-I/PQ's 12-bit ADC (8 channels), 256 bytes RAM, and USART make it a compact core for stand-alone instrumentation front-ends and serial data loggers. The SSP module can stream logged data to an external SPI flash or FRAM for non-volatile storage, while the USART forwards summary packets to a host PC. Industrial temperature grade supports field-deployed instrumentation cabinets. Engineers should use the parallel slave port to attach a character LCD for local readout without consuming timer resources for software bit-banging.
Được đề xuất
Automotive Body Electronics (Non-Safety Subsystems)
The PIC16LC774T-I/PQ's wide 2.5V-5.5V operating voltage matches the automotive 12V battery rail after a 5V regulator, and the industrial -40C to +85C temperature range covers cabin and trunk body-electronics zones. The 33 I/O can drive interior lighting MOSFETs, read door/window position switches, and communicate with the BCM via LIN or CAN through external transceivers. OTP memory is acceptable for fixed-function body controllers. For under-hood or safety-critical ECUs, however, AEC-Q100-qualified PIC16F or PIC18 microcontrollers are required instead.
Được đề xuất
Home Appliance Control Boards
Washing machines, dishwashers, microwave ovens, and HVAC thermostats all benefit from the PIC16LC774T-I/PQ's combination of 33 I/O, 12-bit ADC for temperature/level sensing, PWM for motor or heater control, and USART for diagnostic serial port access. Its CMOS low-power 'LC' design keeps standby consumption below 1 mA - critical for appliances targeting Energy Star ratings. The 44-pin MQFP package is widely accepted by SMT contract manufacturers. Firmware fits comfortably in the 7 KB OTP for typical appliance state-machine control loops.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16LC774T-I/PQ — 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 | PIC16C774T-I/PQ | PIC16LC774T-04I/PQ | PIC16LC774-I/PQ | PIC16LC74BT-04I/PQ | PIC16LC65B-04/PQ |
|---|---|---|---|---|---|---|
| Package | 44-MQFP (PQ) 10x10 mm | 44-MQFP (PQ) 10x10 mm - same | 44-MQFP (PQ) 10x10 mm - same | 44-MQFP (PQ) 10x10 mm - same | 44-MQFP (PQ) 10x10 mm - same | 44-MQFP (PQ) 10x10 mm - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Core | PIC16C 8-bit RISC | PIC16C 8-bit RISC | PIC16C 8-bit RISC | PIC16C 8-bit RISC | PIC16C 8-bit RISC | PIC16C 8-bit RISC |
| Max Clock Frequency | 20 MHz | 20 MHz | 4 MHz | 20 MHz | 4 MHz | 4 MHz |
| Program Memory | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP |
| RAM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 192 bytes | 192 bytes |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 |
| 12-bit ADC | Yes (8 channels) | Yes (8 channels) | Yes (8 channels) | Yes (8 channels) | No (8-bit ADC) | No (8-bit ADC) |
| Parallel Slave Port | Yes (8-bit) | Yes (8-bit) | Yes (8-bit) | Yes (8-bit) | No | No |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | 0C to +70C (Commercial) |
Bảo phân biệt quan trọng
- Full peripheral integration including Parallel Slave Port and 12-bit ADC (vsPIC16LC74BT-04I/PQ)
- 5x higher instruction throughput than the 4 MHz variant (vsPIC16LC774T-04I/PQ)
- LC low-power CMOS process for battery-sensitive designs (vsPIC16C774T-I/PQ)
Ghi chú thiết kế
Place a 0.1 uF ceramic decoupling capacitor within 5 mm of each VDD/VSS pin pair and a single 10 uF bulk tantalum or ceramic capacitor on the main 5V rail. The PIC16LC774T-I/PQ has two VDD pins (21, 39) and two VSS pins (20, 38); both pairs must be decoupled. AVdd (pin 9) and AVss (pin 8) should be filtered with a ferrite bead or 10 ohm resistor from VDD, plus a 0.1 uF + 10 uF decoupling, to keep ADC reference noise below 1 LSB. Estimated: at 20 MHz clock and full peripheral activity, core current consumption is approximately 15 mA, so the LDO upstream must source at least 25 mA per MCU plus I/O sink/source load.
Because the program memory is One-Time-Programmable (OTP), firmware bugs discovered after programming cannot be patched in the field. Validate the complete firmware image, interrupt vectors, and configuration bits using a flash-based PIC16F877 or in-circuit emulator before committing code to OTP. The CONFIG word must set the oscillator mode (HS for 20 MHz crystal), watchdog enable/disable, brown-out detect voltage, and code protection bits - incorrect CONFIG is a frequent cause of 'bricked' PIC16C devices.
Route the 20 MHz oscillator traces (OSC1 pin 10, OSC2 pin 11) as short, symmetrical paths to the crystal or resonator, with the load capacitors (typically 15-33 pF) returned to a quiet ground island. Keep switching regulator or motor driver traces at least 5 mm away from the crystal to avoid clock injection. The MCLR/Vpp pin (1) requires a 10 kohm pull-up to VDD and a 100 nF decoupling capacitor to Vss to ensure clean reset; do not drive MCLR from a long cable without additional filtering.
When using the 12-bit ADC at full 100 kSPS sample rate, source impedance above 2.5 kohm will introduce settling error - buffer each analog input with an op-amp such as the MCP6002 if sensors cannot drive low impedance. The ADC's AVdd reference must be bypassed with at least 10 uF plus 0.1 uF to achieve 12-bit effective resolution; PCB layout should keep analog and digital ground returns separate and joined at a single point under the AVss pin.
Thông tin tuân thủ
RoHS and lead-free status of the 44-MQFP PQ package was not provided in the verified distributor data - confirm via Microchip's product environmental compliance page before placing production orders. Part is not AEC-Q100 qualified; not suitable for automotive safety-critical ECUs.
