PIC16LC72-04I/SS - 8-bit 4MHz MCU, 3.5KB OTP, 28-SSOP | Microchip
MPN： PIC16LC72-04I/SS ✓ 啟用中PIC16LC72-04I/SS 概覽
A microcontroller (MCU) is a single-chip computer containing a CPU, memory, and peripherals. Within the PIC family, the PIC16LC72 belongs to the mid-range architecture, which uses a 14-bit instruction word and Harvard memory structure. Low-dropout CMOS variants (LC) operate over an extended voltage range, making them appropriate for power-constrained embedded systems. In the broader hierarchy, an MCU falls under microcontrollers, then integrated circuits, then semiconductors.
Key features of the PIC16LC72-04I/SS include an industrial temperature grade (-40C to +85C), three timer/counter blocks (8-bit Timer0 with prescaler, 16-bit Timer1 with sleep-mode crystal increment capability, 8-bit Timer2), and synchronous serial port (SSP) supporting both SPI and I2C. Program memory is OTP (one-time programmable), which is suitable for high-volume production where firmware is fixed and code updates are not expected in the field.
The device uses Microchip's classic PIC RISC architecture with a small instruction set and deterministic timing. The integrated 8-bit ADC allows direct interfacing with analog sensors (temperature, light, voltage), while the I2C/SPI peripherals enable communication with external EEPROMs, sensors, and displays. The PIC16LC72 is widely used in legacy and cost-sensitive designs, including automotive subsystems, consumer appliances, and industrial control.
Typical applications for the PIC16LC72-04I/SS include low-power remote sensor nodes, white goods and home appliance motor drivers, HVAC control modules, automotive interior lighting controllers, and simple industrial timer/counter subsystems. The industrial temperature grade allows use in non-extreme factory environments.
When designing with this part, note that the OTP program memory means firmware cannot be field-updated. Engineers should use a flash-based sibling (such as the PIC16F72 family) during development and prototyping, then transition to the PIC16LC72-04I/SS for cost-optimized production. Ensure decoupling capacitors are placed close to VDD/VSS pins and that MCLR is properly biased for reliable resets.
直接替換替代品，適用於 PIC16LC72-04I/SS — 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： PIC16LC72-04I/SS （相同外形與佔位） — 差異在於 Package, Timers, ADC, Operating Temperature, Core Architecture.
PIC16LC72-04I/SP
✅ 直接替換聯絡詢價
查看資料表 →PIC16LC72I-04/SS
✅ 直接替換📋 參考替代品（不在目錄中）
PIC16LC711-04I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC16LC711-04/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC16LC558T-04/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC16LC558-04I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC16LC72-04I/SS 最大額定值與電氣特性
| Manufacturer | Microchip Technology |
| Series | PIC16LC72 |
| Core Processor | PIC |
| Core Size | 8-bit |
| Program Memory Size | 3.5 KB (2K x 14) |
| Program Memory Type | OTP (One-Time Programmable) |
| RAM Size | 128 x 8 bytes |
| 最大時脈頻率 | 4 MHz |
| Number of I/O Pins | 22 |
| Supply Voltage Range | 2.5 V to 5.5 V |
| A/D Converter | 8-bit, 5 channels |
| Connectivity | I2C, SPI |
| Timers | Timer0 (8-bit), Timer1 (16-bit), Timer2 (8-bit) |
| 工作溫度 | -40C to +85C (Industrial) |
| 封裝 | 28-SSOP (0.209 inch / 5.30mm width) |
| 安裝類型 | Surface Mount |
| Terminal Form | GULL WING |
| Architecture | RISC, Harvard, Mid-Range |
PIC16LC72-04I/SS 腳位配置
| 腳位 1 | MCLR — Master Clear (Reset) input, active low |
| 腳位 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| 腳位 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| 腳位 4 | RA2/AN2 — PORTA bit 2 / Analog input 2 |
| 腳位 5 | RA3/AN3/VREF — PORTA bit 3 / Analog input 3 / Voltage Reference |
| 腳位 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| 腳位 7 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SPI Slave Select |
| 腳位 8 | RE0/RD — PORTE bit 0 / Read control (parallel slave port) |
| 腳位 9 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| 腳位 10 | OSC2/CLKOUT — Oscillator crystal output / clock output |
| 腳位 11 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| 腳位 12 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / Capture/Compare/PWM 2 |
| 腳位 13 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM 1 |
| 腳位 14 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| 腳位 15 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| 腳位 16 | RC5/SDO — PORTC bit 5 / SPI data out |
| 腳位 17 | RC6 — PORTC bit 6 |
| 腳位 18 | RC7 — PORTC bit 7 |
| 腳位 19 | VSS — Ground reference |
| 腳位 20 | VDD — Positive supply voltage |
| 腳位 21 | RB0/INT — PORTB bit 0 / External interrupt input |
| 腳位 22 | RB1 — PORTB bit 1 |
| 腳位 23 | RB2 — PORTB bit 2 |
| 腳位 24 | RB3 — PORTB bit 3 |
| 腳位 25 | RB4 — PORTB bit 4 |
| 腳位 26 | RB5 — PORTB bit 5 |
| 腳位 27 | RB6 — PORTB bit 6 |
| 腳位 28 | RB7 — PORTB bit 7 |
典型應用
PIC16LC72-04I/SS 適用於 7 應用s: Low-Power Remote Sensor Node, White Goods and Home Appliance Control, HVAC Control Module, Automotive Interior Lighting Controller, Industrial Timer/Counter Subsystem, Consumer Electronics Remote Control, Security and Access Control Panel.
Low-Power Remote Sensor Node
The PIC16LC72-04I/SS is well suited for battery-powered remote sensor nodes because it operates from 2.5V to 5.5V (compatible with 2x AA alkaline cells or a single lithium cell) and the LC variant has low quiescent current draw. Its integrated 8-bit 5-channel ADC allows direct connection of temperature, humidity, or light sensors without external ADC components. Timer1 can increment during sleep via an external 32.768 kHz crystal, enabling periodic wake-up duty cycling. The I2C/SPI SSP supports external sensor modules or EEPROM data logging.
推薦
White Goods and Home Appliance Control
The PIC16LC72-04I/SS fits white goods (washing machines, dishwashers, microwave ovens, refrigerators) because its 22 I/O pins drive multiple loads, sensors, and user interface elements, while the industrial -40C to +85C temperature range tolerates kitchen/laundry thermal environments. OTP program memory reduces BOM cost for high-volume appliance production where firmware is locked at manufacturing. The I2C interface drives LCD or LED display modules and EEPROM for user setting storage.
推薦
HVAC Control Module
The PIC16LC72-04I/SS works well in HVAC thermostat and damper control modules where its 8-bit ADC reads multiple temperature sensors (room, supply air, return air), digital I/O drives relay controls for fans and valves, and I2C connects to the LCD display and external EEPROM for setpoint storage. The industrial temperature grade handles indoor HVAC equipment thermal stress. Timer0/Timer1/Timer2 provide the precise timing needed for PID loop control and scheduling functions.
推薦
Automotive Interior Lighting Controller
The PIC16LC72-04I/SS serves automotive dome-light, ambient lighting, and interior LED controller applications where 22 I/O pins drive multiple LED channels via PWM or simple GPIO control. The industrial temperature range covers cabin environments. I2C connects to body control modules for command input, and the 8-bit ADC monitors battery voltage or ambient light sensors for automatic on/off control. OTP memory locks the lighting pattern firmware at production.
推薦
Industrial Timer/Counter Subsystem
The PIC16LC72-04I/SS fits industrial timer, counter, and process controller subsystems because its three timers (8-bit Timer0, 16-bit Timer1, 8-bit Timer2) handle multiple independent time bases for sequencing, debouncing, and PWM generation. The 8-bit ADC reads 4-20 mA process signals via a sense resistor, and the industrial temperature grade operates reliably in factory ambient conditions. 22 I/O pins drive relays, status LEDs, and keypad inputs.
推薦
Consumer Electronics Remote Control
The PIC16LC72-04I/SS supports consumer IR/RF remote controls because its low-power CMOS design extends battery life across months of standby, and the integrated ADC reads battery voltage for low-battery warnings. The I2C/SPI SSP can drive external RF transceivers or IR modulator ICs. The 22 I/O pins scan a full matrix keypad (4x5 or 5x4) and drive status LEDs without external logic, keeping BOM cost minimal.
推薦
Security and Access Control Panel
The PIC16LC72-04I/SS fits security alarm panels, door access controllers, and keypad-based entry systems because its I2C/SPI interface connects to external EEPROM for credential storage and to LCD displays for status indication. The 22 I/O pins scan matrix keypads (4x4 or larger), drive multiple zone-status indicators, and control relay outputs for door strikes or sirens. OTP memory prevents field firmware tampering in security applications.
推薦
推薦產品摘要
工程參考資料，適用於 PIC16LC72-04I/SS — 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 | PIC16LC72-04I/SP | PIC16LC72I-04/SS | PIC16LC711-04I/SO | PIC16LC711-04/SO |
|---|---|---|---|---|---|
| Package | 28-SSOP | 28-SPDIP | 28-SSOP - same | 28-SOIC | 28-SOIC |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 1.75 KB OTP | 1.75 KB OTP |
| RAM Size | 128 bytes | 128 bytes | 128 bytes | 68 bytes | 68 bytes |
| Max Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| ADC | 8-bit, 5 channels | 8-bit, 5 channels | 8-bit, 5 channels | 8-bit, 4 channels | 8-bit, 4 channels |
| I/O Pins | 22 | 22 | 22 | 15 | 15 |
| Connectivity | I2C, SPI | I2C, SPI | I2C, SPI | I2C, SPI | I2C, SPI |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | 0C to +70C |
主要差異化特點
- Mid-range PIC architecture with 3.5KB OTP and 5-channel 8-bit ADC (對比PIC16LC711-04I/SO)
- Same SSOP-28 package for drop-in compatibility with temperature grade variants (對比PIC16LC72I-04/SS)
- Integrated I2C/SPI synchronous serial port for peripheral expansion (對比PIC16LC558T-04/SO)
設計說明
Decouple VDD (pin 20) with a 100 nF ceramic capacitor placed within 5 mm of the VDD pin, and add a bulk 10 uF tantalum or aluminum capacitor near the IC. The PIC16LC72-04I/SS operates from 2.5V to 5.5V. For battery-powered designs, use the LC variant's lower quiescent current and put the device into sleep mode between ADC conversions. Add a series inductor or ferrite bead on VDD if the supply is shared with a switching regulator to prevent digital switching noise from coupling into the analog ADC measurements.
The 28-SSOP package has 0.65 mm pitch leads and gull-wing terminations. Route all 28-SSOP signals on a single routing layer if possible, and use a ground pour on the opposite side. Place the MCLR pull-up resistor (typically 10 kohm) close to pin 1, and route the crystal/oscillator traces to pins 9-10 with short, symmetric traces and a guard ring tied to ground. Avoid routing high-speed signals (CCP PWM, SPI clock) under or near the analog ADC inputs (RA0-RA5/AN0-AN4) to minimize digital-to-analog crosstalk.
OTP (one-time programmable) memory cannot be erased or rewritten - once a PIC16LC72-04I/SS is programmed, the firmware is locked. Engineers should develop and debug using a flash-based sibling such as PIC16F72-I/SS, then transition to the LC72 for production to save BOM cost. Ensure MCLR (pin 1) is never left floating during operation - use a proper pull-up to VDD. When using the ADC, allow adequate acquisition time (typically 20 us) before starting conversion to avoid channel-to-channel crosstalk and inaccurate readings.
合規資訊
Compliance status not explicitly stated in the verified web data. RoHS/REACH lead-free status should be confirmed with Microchip directly for production designs. AEC-Q100 not applicable - this part targets industrial/consumer applications, not automotive-grade qualification. The OTP (one-time programmable) memory and 28-SSOP package suggest this is a legacy, mature product.
