PIC16LC65AT-04/PQ - 4MHz 8-Bit OTP MCU, 7KB, 44-MQFP | Microchip
MPN: PIC16LC65AT-04/PQ ✓ Hoạt độngPIC16LC65AT-04/PQ Tóm tắt
An 8-bit PIC microcontroller is a Harvard-architecture RISC device that executes one instruction per clock cycle (except branches, which take two). The PIC16C family, to which this part belongs, pioneered the OTP-programmed PIC architecture that has since evolved into the flash-based PIC16F family. MCUs such as the PIC16LC65A sit at the bottom of the embedded controller hierarchy: they integrate CPU core, non-volatile program memory, RAM, peripherals, and I/O into a single die, and they typically replace discrete logic in consumer, industrial, and appliance applications where deterministic real-time behavior is more important than absolute compute throughput.
Key features include 33 general-purpose digital I/O pins, three serial communication peripherals (I2C/SPI for short-distance inter-chip links and a UART/USART for asynchronous serial), and a high-performance RISC CPU with only 35 single-word instructions. The CMOS LC process variant lowers quiescent current draw relative to the standard 'C' die, allowing battery-friendly operation in the 3V-5.5V window. Multiple timer/counter modules support PWM generation and event timing. The 44-MQFP package is a JEDEC-standard 10x10mm metric quad flat pack suitable for surface-mount assembly.
Technically, the PIC16LC65A uses a 14-bit instruction word and a separate 8-bit data path, enabling compact code density compared with 8-bit CISC alternatives. Its deterministic 4-cycle instruction timing simplifies real-time scheduler design. Brown-out detection and a watchdog timer enhance field reliability in unattended industrial installations.
Typical applications include embedded control for industrial automation, HVAC, white goods, security alarm panels, and low-cost general-purpose control boards. Its combination of I2C, SPI, and UART peripherals makes it well-suited as a sensor hub or display controller. Designers also use the PIC16LC65A as a logic-replacement MCU bridging discrete components and modern bus interfaces.
When designing with this part, note that the 'LC' suffix requires a regulated supply within 3.0V-5.5V. Decoupling the VDD/VSS pair with 100nF ceramic capacitors placed within 5mm of each pin pair is recommended to suppress switching noise.
This page consolidates verified distributor pricing, drop-in Microchip PIC16LC65A-family alternatives, and practical design guidance not gathered in a single document elsewhere.
Bộ thay thế dễ dàng lắp đặt cho PIC16LC65AT-04/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 PIC16LC65AT-04/PQ (cùng hình factor và footprint) — khác nhau ở ADC, Timers, Program Memory Size, Program Memory Type, Supply Voltage Range.
PIC16LC65A-04/PQ
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Xem tài liệu →PIC16LC65A-04I/PQ
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Xem tài liệu →PIC16LC65AT-04E/PQ
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LC65BT-04/PQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC65BT-04I/PQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC65AT-04I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC65AT-04/PQ Tỷ lệ tối đa & tính chất điện
| Manufacturer | Microchip Technology |
| Series | PIC 16C |
| Core Processor | PIC |
| Core Size | 8-Bit |
| Maximum Clock Speed | 4 MHz |
| Program Memory Size | 7 KB (4K x 14) OTP |
| RAM Size | 192 bytes |
| Supply Voltage Range | 3 V to 5.5 V |
| Number of I/O Pins | 33 |
| Package Type | 44-MQFP (10x10 mm), Metric Quad Flat Pack |
| Kiểu lắp đặt | Surface Mount |
| Connectivity | I2C, SPI, UART/USART |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
| Instruction Set | 35 single-word instructions, mostly single-cycle |
Cấu hình chân PIC16LC65AT-04/PQ
| Chân 1 | OSC1/CLKIN — Oscillator input / external clock input |
| Chân 2 | RA0/AN0 — Port A bit 0 / analog input 0 |
| Chân 3 | RA1/AN1 — Port A bit 1 / analog input 1 |
| Chân 4 | RA2/AN2 — Port A bit 2 / analog input 2 |
| Chân 5 | RA3/AN3/VREF — Port A bit 3 / analog input 3 / VREF |
| Chân 6 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| Chân 7 | RA5/SS/AN4 — Port A bit 5 / SPI slave select / analog input 4 |
| Chân 8 | RE0/RD/AN5 — Port E bit 0 / read control / analog input 5 |
| Chân 9 | RE1/WR/AN6 — Port E bit 1 / write control / analog input 6 |
| Chân 10 | RE2/CS/AN7 — Port E bit 2 / chip select / analog input 7 |
| Chân 11 | VDD — Positive supply (3 V to 5.5 V) |
| Chân 12 | VSS — Ground reference |
| Chân 13 | OSC2/CLKOUT — Oscillator output / clock output |
| Chân 14 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer1 oscillator output / Timer1 clock input |
| Chân 15 | RC1/T1OSI/CCP2 — Port C bit 1 / Timer1 oscillator input / CCP2 |
| Chân 16 | RC2/CCP1 — Port C bit 2 / CCP1 PWM/capture |
| Chân 17 | RC3/SCK/SCL — Port C bit 3 / SPI clock / I2C clock |
| Chân 18 | RD0/PSP0 — Port D bit 0 / parallel slave port bit 0 |
| Chân 19 | RD1/PSP1 — Port D bit 1 / parallel slave port bit 1 |
| Chân 20 | RD2/PSP2 — Port D bit 2 / parallel slave port bit 2 |
| Chân 21 | RD3/PSP3 — Port D bit 3 / parallel slave port bit 3 |
| Chân 22 | RC4/SDI/SDA — Port C bit 4 / SPI data in / I2C data |
| Chân 23 | RC5/SDO — Port C bit 5 / SPI data out |
| Chân 24 | RC6/TX/CK1 — Port C bit 6 / USART TX / USART clock |
| Chân 25 | RC7/RX/DT1 — Port C bit 7 / USART RX / USART data |
| Chân 26 | RD4/PSP4 — Port D bit 4 / parallel slave port bit 4 |
| Chân 27 | RD5/PSP5 — Port D bit 5 / parallel slave port bit 5 |
| Chân 28 | RD6/PSP6 — Port D bit 6 / parallel slave port bit 6 |
| Chân 29 | RD7/PSP7 — Port D bit 7 / parallel slave port bit 7 |
| Chân 30 | VSS — Ground reference |
| Chân 31 | VDD — Positive supply (3 V to 5.5 V) |
| Chân 32 | RB0/INT — Port B bit 0 / external interrupt |
| Chân 33 | RB1 — Port B bit 1 |
| Chân 34 | RB2 — Port B bit 2 |
| Chân 35 | RB3 — Port B bit 3 |
| Chân 36 | RB4 — Port B bit 4 |
| Chân 37 | RB5 — Port B bit 5 |
| Chân 38 | RB6/PGC — Port B bit 6 / ICSP clock |
| Chân 39 | RB7/PGD — Port B bit 7 / ICSP data |
| Chân 40 | MCLR/VPP — Master clear reset / programming voltage |
| Chân 41 | RA6 — Port A bit 6 |
| Chân 42 | RA7 — Port A bit 7 |
| Chân 43 | VSS — Ground reference |
| Chân 44 | VDD — Positive supply (3 V to 5.5 V) |
Ứng dụng tiêu biểu
PIC16LC65AT-04/PQ phù hợp cho 6 Áp dụngs: Industrial Automation Controllers, HVAC Control Boards, Security Alarm Panels, White Goods / Appliance Controllers, Sensor Hub / Data Aggregator, Display Controller / User-Interface MCU.
Industrial Automation Controllers
The PIC16LC65AT-04/PQ fits industrial automation controllers because its 33 GPIO pins can drive relays, optocouplers, and sensor arrays while the I2C/SPI/UART peripherals talk to PLC backplanes and HMI panels. At 4 MHz the deterministic instruction timing enables precise PWM-driven motor and actuator sequencing, and the on-chip brown-out reset plus watchdog timer deliver the field reliability required for unattended factory-floor installations. With 7 KB of OTP memory, designers can hold full state-machine plus Modbus-RTU firmware on-chip. The 3 V-5.5 V supply window accepts a wide range of regulated industrial 24 V-derived rails, simplifying power-tree design.
Được đề xuất
HVAC Control Boards
HVAC control boards benefit from the PIC16LC65AT-04/PQ's combination of 33 digital I/O for keypad/LED interfaces, UART for thermostat networking, and PWM timers for triac-fired damper and valve control. The CMOS LC process variant keeps quiescent current low, important for always-on climate-control thermostats drawing standby power from battery or wall transformers. With 7 KB of OTP, the firmware can hold full PID control loops plus user-interface logic without external memory. The 4 MHz clock rate is more than adequate for sub-second HVAC update cycles.
Được đề xuất
Security Alarm Panels
The PIC16LC65AT-04/PQ is well-matched to security alarm panels because its I2C peripheral can poll PIR sensors and keypad matrices, the SPI bus can drive an LCD character display, and the UART enables dialer or cellular-module interfaces. The brown-out reset prevents false alarm states during power glitches, while the watchdog timer recovers the panel from firmware lockups. The 192 bytes of RAM are sufficient for zone-status buffering, and the 7 KB OTP holds full alarm-state machine plus dialer protocols.
Được đề xuất
White Goods / Appliance Controllers
White goods such as washing machines and dishwashers use the PIC16LC65AT-04/PQ to replace electromechanical timers with microcontroller-driven cycle control. Its 33 GPIO can scan keypads and drive 7-segment or LCD displays, while PWM timers control motor speed and triac-fired heater elements. The OTP memory stores fixed wash-cycle profiles, and the CMOS LC variant operates efficiently from rectified mains-derived 5 V rails. With 4 MHz clock and deterministic RISC execution, real-time motor control loops run reliably.
Được đề xuất
Sensor Hub / Data Aggregator
The PIC16LC65AT-04/PQ acts as a low-cost sensor hub by aggregating I2C temperature, pressure, and humidity sensors, then relaying the consolidated data over UART or SPI to a higher-level processor. Its 33 GPIO lines provide ample chip-select and interrupt fan-out for multi-sensor I2C buses. The 3 V-5.5 V supply lets it ride directly on battery stacks, and the LC variant's low quiescent current preserves battery life in remote sensor installations. At 4 MHz the CPU can service sub-kHz sensor update rates without missing events.
Được đề xuất
Display Controller / User-Interface MCU
The PIC16LC65AT-04/PQ is well-suited as a dedicated display controller or user-interface MCU, offloading menu rendering from a host processor. Its SPI peripheral drives graphic or character LCDs at high frame rates, while GPIO pins scan keypads and LEDs. The 192 bytes of RAM hold screen buffers and debounce state, and the 7 KB OTP stores fonts plus menu trees. With I2C and UART alongside SPI, the same MCU can simultaneously drive a display, a touch controller, and a back-channel communication port, reducing overall BOM cost.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16LC65AT-04/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 | PIC16LC65A-04/PQ | PIC16LC65A-04I/PQ | PIC16LC65AT-04E/PQ | PIC16LC65BT-04/PQ | PIC16LC65BT-04I/PQ | PIC16LC65AT-04I/PT |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-MQFP (10x10 mm) | 44-MQFP (10x10 mm) | 44-MQFP (10x10 mm) | 44-MQFP (10x10 mm) | 44-MQFP (10x10 mm) | 44-MQFP (10x10 mm) | 44-TQFP (10x10 mm) |
| Maximum Clock Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 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 | 7 KB OTP |
| RAM | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 192 bytes |
| Supply Voltage | 3 V to 5.5 V | 3 V to 5.5 V | 3 V to 5.5 V | 3 V to 5.5 V | 3 V to 5.5 V | 3 V to 5.5 V | 3 V to 5.5 V |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 | 33 |
| Packaging Format | Tape & Reel | Tray | Tray | Tray | Tray | Tray | Tape & Reel (TQFP) |
| Temperature Grade | Commercial (per part suffix) | Commercial | Industrial | Extended | Commercial | Industrial | Industrial |
Bảo phân biệt quan trọng
- Tape-and-reel variant of legacy OTP PIC16LC65A die (vsPIC16LC65A-04/PQ (tray variant))
- Industrial temperature grade option available (vsPIC16LC65A-04I/PQ (industrial grade))
- B-revision silicon available with errata fixes (vsPIC16LC65BT-04/PQ (B revision))
- TQFP package option for thinner enclosures (vsPIC16LC65AT-04I/PT (TQFP variant))
Ghi chú thiết kế
The PIC16LC65AT-04/PQ requires a regulated 3 V to 5.5 V supply per the datasheet. Place a 100 nF decoupling ceramic capacitor within 5 mm of each VDD/VSS pin pair (the device has multiple VDD/VSS pairs on pins 11/12, 30/31, 43/44). For battery operation, choose a low-dropout regulator with <50 mV dropout to maximize usable battery capacity. The 'LC' suffix denotes low-voltage CMOS, which limits operation below 3 V; respect this to avoid brown-out reset.
Route the 4 MHz crystal traces (OSC1/OSC2) with short, symmetric traces and a ground guard ring to minimize EMI and stray capacitance. Place the MCLR/VPP pull-up resistor (typically 10 kohm) close to pin 40 to ensure clean reset behavior. Keep ICSP clock/data lines (RB6/RB7) away from analog signals to prevent programming-time noise coupling. Use a four-layer PCB with a dedicated ground plane for clean digital switching.
Do not confuse the PIC16LC65AT-04/PQ with the PIC16F877A-family flash parts, which have different memory maps and peripheral layouts despite sharing some package pin counts. Verify that downstream tools (compiler, programmer, debugger) target the PIC16C65/LC65A instruction set, not the PIC16F877 set. Also note that '04' = 4 MHz speed grade; do not clock above 4 MHz. Use MPLAB 8.x or legacy IDE for the PIC16C family; modern XC8 compilers may not fully support OTP PIC16C parts.
When routing the 44-MQFP (10x10 mm) on a two-layer board, allocate at least 8 mil traces with 8 mil spaces between MQFP leads (0.8 mm pitch). Use vias under the exposed die-pad area if the package variant supports thermal pad stitching. Place bypass capacitors on the same layer as the MCU with vias to the ground plane directly under the cap. Verify the MCLR pull-up is not shared with a long trace that could pick up noise and cause spurious resets in noisy industrial environments.
Thông tin tuân thủ
Compliance status for RoHS, REACH, lead-free, and halogen-free not confirmed in the verified web data - refer to the Microchip product page or contact the manufacturer. AEC-Q100 not applicable to commercial/industrial PIC16C OTP microcontrollers in the legacy 'LC' line.
