PIC16LC72-04/SO - 8-bit 4MHz OTP MCU 28-SOIC | Microchip
MPN: PIC16LC72-04/SO ✗ Cuối đờiPIC16LC72-04/SO Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals; mid-range PIC16C devices specifically trade off Flash program memory for OTP technology, keeping unit prices competitive for high-volume consumer and industrial embedded products. Within the broader hierarchy, the PIC16LC72 belongs to PIC16C family -> mid-range PIC16 -> PIC microcontrollers -> 8-bit microcontrollers -> microcontrollers -> integrated circuits.
Key features include 5-channel 8-bit ADC, synchronous serial port (SPI / I2C), 3 timer modules (Timer0, Timer1, Timer2), 8-bit parallel slave port, watchdog timer with on-chip RC oscillator, programmable code protection, and a wide operating voltage range typical of the LC family. According to the manufacturer datasheet, the device offers 8-bit-wide Harvard architecture and 14-bit instruction word optimized for compact assembly code density.
Typical applications include industrial automation controllers, consumer appliance interfaces, low-power sensor signal conditioning, and small-form-factor embedded control boards where OTP cost advantages outweigh reprogrammability. The 28-SOIC footprint is the most widely supported mid-range PIC package, simplifying PCB layout for both hand-prototyping and high-volume SMT assembly.
When designing with this part, note that OTP memory cannot be erased or rewritten: firmware must be 100% validated before commitment. For prototype or field-upgradable designs, consider Flash-based members of the PIC16F family in the same 28-SOIC footprint. The 0C to 70C commercial temperature range restricts the LC variant to non-industrial environments; choose the "-I" or "-E" suffix parts for extended-range designs. Prices vary by source per Datasheet View and Compare All Substitutes Image shown is a representation only. Exact specifications should be obtained from the product data sheet.
Bộ thay thế dễ dàng lắp đặt cho PIC16LC72-04/SO — 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 PIC16LC72-04/SO (cùng hình factor và footprint) — khác nhau ở Package, Timers, Program Memory Size, ADC, MSL Level.
PIC16LC72A-04/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LC72-04I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC72-04/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC71-04/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC66-04/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F72-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC72-04/SO Tỷ lệ tối đa & tính chất điện
| Core | PIC16C mid-range 8-bit RISC |
| Instruction Set Architecture | Harvard, 14-bit instruction word |
| Tần số xung maksimum | 4 MHz |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 3.5 KB (2K x 14) |
| RAM Size | 128 bytes |
| Data EEPROM | Not present (OTP device) |
| I/O Pins | 22 |
| ADC | 8-bit, 5 channels |
| Serial Interfaces | SSP (SPI / I2C) |
| Timers | 3 (Timer0, Timer1, Timer2) |
| Watchdog Timer | Yes, with on-chip RC oscillator |
| Parallel Slave Port | Yes, 8-bit |
| Hộp | 28-SOIC (0.295" / 7.50 mm body width) |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | 0C to +70C (commercial grade) |
| Technology Family | PIC16C low-power CMOS ("LC") |
| Speed Grade Suffix | -04 (4 MHz) |
| Trạng thái RoHS | Check manufacturer (vintage part) |
| Cấp MSL | 1 (unsealed / dry-pack standard for SOIC) |
Cấu hình chân PIC16LC72-04/SO
| Chân 1 | RA0/AN0 — PORTA bit 0 / Analog input channel 0 |
| Chân 2 | RA1/AN1 — PORTA bit 1 / Analog input channel 1 |
| Chân 3 | RA2/AN2/VREF- — PORTA bit 2 / Analog input channel 2 / ADC VREF- |
| Chân 4 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input channel 3 / ADC VREF+ |
| Chân 5 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Chân 6 | RA5/AN4/SS — PORTA bit 5 / Analog input channel 4 / SPI Slave Select |
| Chân 7 | VSS — Ground reference |
| Chân 8 | OSC1/CLKIN — Oscillator crystal input / external clock in |
| Chân 9 | OSC2/CLKOUT — Oscillator crystal output / clock out |
| Chân 10 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Chân 11 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| Chân 12 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM/Capture |
| Chân 13 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Chân 14 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Chân 15 | RC5/SDO — PORTC bit 5 / SPI data out |
| Chân 16 | RC6/TX/CK — PORTC bit 6 / USART TX / USART clock |
| Chân 17 | RC7/RX/DT — PORTC bit 7 / USART RX / USART data |
| Chân 18 | VSS — Ground reference (second pin) |
| Chân 19 | VDD — Positive supply voltage |
| Chân 20 | RB0/INT — PORTB bit 0 / External interrupt |
| Chân 21 | RB1 — PORTB bit 1 |
| Chân 22 | RB2 — PORTB bit 2 |
| Chân 23 | RB3/PGM — PORTB bit 3 / Low-voltage programming |
| Chân 24 | RB4 — PORTB bit 4 (interrupt-on-change) |
| Chân 25 | RB5 — PORTB bit 5 (interrupt-on-change) |
| Chân 26 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Chân 27 | RB7/PGD — PORTB bit 7 / ICSP data |
| Chân 28 | VDD — Positive supply voltage (second pin) |
Ứng dụng tiêu biểu
PIC16LC72-04/SO phù hợp cho 6 Áp dụngs: Industrial Automation Controllers, Consumer Appliance Interfaces, Low-Power Sensor Signal Conditioning, HVAC Thermostat Controls, Educational Microcontroller Trainer Boards, Small Embedded Control Boards.
Industrial Automation Controllers
The PIC16LC72-04/SO fits industrial automation control loops that require deterministic 8-bit processing at modest sample rates. Its 4 MHz clock delivers 1 microsecond instruction cycles, well-matched to PID loops running at sub-kHz control rates for motor drives, valve actuators, or sensor multiplexing hubs. The integrated 5-channel 8-bit ADC reads process variables (temperature, pressure, position) directly without an external ADC IC, saving BOM cost and PCB area in dense controller boards. The SSP port (SPI / I2C) talks to digital sensors, EEPROM, or display drivers, while 22 I/O lines drive relays, optocouplers, and status LEDs. Commercial 0-70C temperature range suits cabinet-mounted controllers; for harsher factory floors, choose the PIC16LC72-04I/SO industrial-grade option.
Được đề xuất
Consumer Appliance Interfaces
The PIC16LC72-04/SO is widely used in cost-sensitive consumer appliances (washing machines, microwave ovens, small kitchen devices) where OTP memory's lower die cost outweighs the loss of in-field reprogrammability. Its 3.5 KB of program memory is sufficient for keypad scanning, seven-segment or LCD display driving, and basic state-machine control of pumps, heaters, and buzzers. The 22 I/O lines handle matrix keypads (8x4 typical) and parallel LED arrays without external I/O expanders, and the 5-channel ADC reads temperature, humidity, or weight sensors for cooking-cycle automation. The 28-SOIC package supports low-cost SMT assembly lines and survives typical consumer thermal profiles.
Được đề xuất
Low-Power Sensor Signal Conditioning
The PIC16LC72-04/SO's CMOS "LC" technology gives lower quiescent current than the standard PIC16C72, making it well suited to battery-powered sensor conditioning front-ends that sleep between measurements. The 4 MHz maximum clock and short wake-up time from Sleep mode suit duty-cycled sensing: wake, sample one ADC channel, transmit via SSP/I2C, return to sleep. With 22 I/O available, multiple sensors (temperature, pressure, gas, light) can share a single MCU, each on its own analog input. Combined with the small 28-SOIC footprint, this enables compact, low-power wireless sensor nodes or handheld instrumentation that runs for months on a single AA battery pair.
Được đề xuất
HVAC Thermostat Controls
The PIC16LC72-04/SO suits residential and light-commercial HVAC thermostat controllers that integrate temperature sensing, setpoint entry via keypad, and relay switching of furnace/AC stages. The 5-channel 8-bit ADC reads indoor temperature, setpoint potentiometer, and humidity sensor; the 22 I/O lines drive the LCD, keypad, and triac-driver optocouplers that switch 24 VAC loads. OTP memory's low cost suits the high-volume thermostat market where firmware is locked at the time of production. The 28-SOLIC package handles SMT automation and the resulting uptime keeps the bill of materials low for OEM thermostat makers.
Được đề xuất
Educational Microcontroller Trainer Boards
The PIC16LC72-04/SO is well suited to introductory microcontroller trainer boards and educational kits for undergraduate embedded-systems courses. The 28-SOLIC package is easy for students to hand-solder or rework, while the PIC16C mid-range instruction set is widely documented in textbooks and Microchip application notes. 3.5 KB OTP fits sample programs covering GPIO, ADC, timers, and SPI/I2C peripheral tutorials without overflowing. The 22 I/O lines support breadboard-friendly breakout of every peripheral, and the PICkit 1 / PICkit 2 programmer chain simplifies in-circuit programming for student projects.
Được đề xuất
Small Embedded Control Boards
The PIC16LC72-04/SO's combination of 3.5 KB OTP, 22 I/O, and 5-channel ADC makes it a general-purpose controller for small embedded boards that read a few analog signals and drive a few digital actuators. Typical examples include battery charger front-ends, vending machine coin acceptors, and small robotics motor controllers. The 28-SOLIC package is supported across all major PCB CAD libraries and pick-and-place libraries, simplifying design. The parallel slave port enables connection to a host CPU when the application outgrows the LC72, while the SSP port supports off-board peripherals.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16LC72-04/SO — 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 | PIC16LC72A-04/SO | PIC16LC72-04I/SO | PIC16LC71-04/SO | PIC16LC66-04/SO | PIC16F72-I/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same |
| Program Memory | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 1.75 KB OTP | 14 KB OTP | 2 KB Flash |
| Max Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 20 MHz |
| RAM Size | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 368 bytes | 128 bytes |
| I/O Pins | 22 | 22 | 22 | 22 | 22 | 22 |
| ADC | 8-bit, 5 channels | 8-bit, 5 channels | 8-bit, 5 channels | 8-bit, 4 channels | 8-bit, 5 channels | 8-bit, 5 channels |
| Operating Temperature | 0C to +70C (commercial) | 0C to +70C | -40C to +85C (industrial) | 0C to +70C | 0C to +70C | -40C to +85C (industrial) |
| Memory Type | OTP (one-time programmable) | OTP | OTP | OTP | OTP | Flash (reprogrammable) |
Bảo phân biệt quan trọng
- Low-power CMOS "LC" silicon for battery applications (vsPIC16C72-04/SO (standard PIC16C72))
- 5-channel 8-bit ADC integrated on-chip (vsPIC16LC71-04/SO (4-channel only))
- OTP at $3.06 qty-1 vs Flash at similar price (vsPIC16F72-I/SO (Flash-based))
Ghi chú thiết kế
OTP memory is one-time programmable - firmware bugs cannot be patched. Always prototype with a Flash-based equivalent (PIC16F72-I/SO in the same 28-SOIC footprint) before committing to the PIC16LC72-04/SO production run. Once programmed, the part cannot be erased by UV or electrical means; each firmware revision requires a new reel of parts. Estimate that your IC layout, BOM, and validation should match the Flash prototype before OTP commit.
Place a 100 nF decoupling capacitor as close as possible to pin 19 (VDD) and pin 28 (VDD) and use a short ground return to pin 7 and pin 18 (VSS). For ADC accuracy, add a 10 microF range to the analog supply and isolate analog VREF (pin 4 RA3/VREF+) from digital VDD with a ferrite bead or RC filter when sampling low-impedance sensors. The 28-SOIC pad pattern is standard and supported by all major PCB CAD footprints; verify the keep-out clearance matches the 7.50 mm body width.
The "LC" low-power CMOS variant has lower quiescent current than the standard PIC16C72. Use Sleep mode between ADC samples for duty-cycled sensor applications - the part wakes in microseconds from the Watchdog Timer or external interrupt on RB0/INT. Verify your firmware enters Sleep only after disabling the ADC module to avoid idle ADC bias current; this can reduce average Iq from milliamps to tens of microamps in low-duty-cycle applications.
Thông tin tuân thủ
Vintage OTP MCU; AEC-Q100 not applicable for consumer/industrial microcontrollers. RoHS / lead-free status should be verified against the lot-specific manufacturer documentation before modern SMT lines.
