PIC16LC925-I/L - 8-bit PIC MCU 7KB OTP LCD Driver | Microchip
MPN： PIC16LC925-I/L ✓ 啟用中PIC16LC925-I/L 概覽
Background: A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data memory, and peripheral interfaces. The PIC16LC925 belongs to the mid-range PIC family built on a Harvard RISC architecture with separate program and data buses. PIC microcontrollers sit within the broader taxonomy of microcontrollers -> embedded microcontrollers -> CMOS microcontrollers -> 8-bit MCUs. The "LC" suffix designates a low-power CMOS variant optimized for battery-friendly operation, and this specific part integrates a segment LCD driver for direct glass connection.
Key features include 52 digital I/O pins, a 20 MHz maximum clock speed, and an integrated LCD driver supporting up to 96 segments. The device operates from a 2.5V to 5.5V supply (typical 5V), includes three timers, a USART, and an analog comparator. Its instruction set is optimized for compact code density with 35 single-word instructions, most executing in a single instruction cycle.
The PIC16LC925 uses a modified Harvard architecture with a 14-bit instruction word and separate 8-bit data path. The integrated LCD module features selectable bias and duty cycle configurations, charge pump option, and software-controlled contrast. In-system programming is supported via the ICSP interface, simplifying field updates.
Typical applications include industrial control panels with LCD readouts, medical instrument displays, automotive dashboard sub-systems, instrumentation with character or graphic LCDs, point-of-sale terminals, and consumer appliances requiring a low-power MCU with display capability.
When designing with this part, note that OTP memory cannot be reprogrammed in-circuit; ensure firmware is fully validated before blowing the OTP array. Use the ICSP header for prototype development and migrate to a Flash-based PIC16F equivalent for production flexibility.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not consolidated in the manufacturer datasheet alone.
直接替換替代品，適用於 PIC16LC925-I/L — 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： PIC16LC925-I/L （相同外形與佔位） — 差異在於 Operating Temperature, Package, Mounting Type, Program Memory Size, Core Architecture.
PIC16LC925T-I/L
✅ 直接替換📋 參考替代品（不在目錄中）
PIC16LC924-04/PT
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →PIC16F946-I/L
✅ 直接替換📋 參考替代品（不在目錄中）
PIC16F946T-I/L
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
PIC16LC925-I/P
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
PIC16LC925-I/L 最大額定值與電氣特性
| Product Type | 8-bit Microcontroller (MCU) |
| Series | PIC 16C |
| Core Processor | PIC |
| Core Size | 8-bit |
| Program Memory Size | 7 KB (4K x 14) OTP |
| RAM Size | 176 bytes |
| Number of I/O | 52 |
| Maximum Clock Speed | 20 MHz |
| 供應電壓 | 2.5 V to 5.5 V (5 V typical) |
| 工作溫度 | -40 C to +85 C (Industrial) |
| 封裝 | 68-PLCC (J-Lead), 24.23 x 24.23 mm |
| Integrated LCD Driver | Yes, up to 96 segments |
| Connectivity | USART |
| Peripherals | LCD Driver, 3 Timers, Analog Comparator, Watchdog Timer |
| 安裝類型 | Surface Mount |
PIC16LC925-I/L 腳位配置
| 腳位 1 | SEG0 — LCD Segment 0 output |
| 腳位 2 | SEG1 — LCD Segment 1 output |
| 腳位 3 | SEG2 — LCD Segment 2 output |
| 腳位 4 | SEG3 — LCD Segment 3 output |
| 腳位 5 | SEG4 — LCD Segment 4 output |
| 腳位 6 | SEG5 — LCD Segment 5 output |
| 腳位 7 | SEG6 — LCD Segment 6 output |
| 腳位 8 | SEG7 — LCD Segment 7 output |
| 腳位 9 | SEG8 — LCD Segment 8 output |
| 腳位 10 | SEG9 — LCD Segment 9 output |
| 腳位 11 | SEG10 — LCD Segment 10 output |
| 腳位 12 | SEG11 — LCD Segment 11 output |
| 腳位 13 | SEG12 — LCD Segment 12 output |
| 腳位 14 | SEG13 — LCD Segment 13 output |
| 腳位 15 | SEG14 — LCD Segment 14 output |
| 腳位 16 | SEG15 — LCD Segment 15 output |
| 腳位 17 | VDD — Positive supply voltage |
| 腳位 18 | VSS — Ground reference |
| 腳位 19 | OSC1 — Oscillator input / external clock |
| 腳位 20 | OSC2 — Oscillator output |
| 腳位 21 | VLCD1 — LCD bias voltage 1 |
| 腳位 22 | VLCD2 — LCD bias voltage 2 |
| 腳位 23 | VLCD3 — LCD bias voltage 3 |
| 腳位 24 | COM0 — LCD Common 0 backplane |
| 腳位 25 | COM1 — LCD Common 1 backplane |
| 腳位 26 | COM2 — LCD Common 2 backplane |
| 腳位 27 | COM3 — LCD Common 3 backplane |
| 腳位 28 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| 腳位 29 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| 腳位 30 | RA2/AN2 — PORTA bit 2 / Analog input 2 |
| 腳位 31 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / Voltage reference plus |
| 腳位 32 | RA4/T0CKI — PORTA bit 4 / Timer 0 clock input |
| 腳位 33 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SPI slave select |
| 腳位 34 | RA6/OSC2 — PORTA bit 6 / secondary oscillator output |
| 腳位 35 | RA7/OSC1 — PORTA bit 7 / secondary oscillator input |
| 腳位 36 | RB0/INT — PORTB bit 0 / External interrupt |
| 腳位 37 | RB1 — PORTB bit 1 |
| 腳位 38 | RB2 — PORTB bit 2 |
| 腳位 39 | RB3 — PORTB bit 3 |
| 腳位 40 | RB4 — PORTB bit 4 |
| 腳位 41 | RB5 — PORTB bit 5 |
| 腳位 42 | RB6/PGC — PORTB bit 6 / ICSP clock |
| 腳位 43 | RB7/PGD — PORTB bit 7 / ICSP data |
| 腳位 44 | RC0 — PORTC bit 0 |
| 腳位 45 | RC1 — PORTC bit 1 |
| 腳位 46 | RC2/CCP1 — PORTC bit 2 / Capture-Compare-PWM 1 |
| 腳位 47 | RC3 — PORTC bit 3 |
| 腳位 48 | RC4 — PORTC bit 4 |
| 腳位 49 | RC5 — PORTC bit 5 |
| 腳位 50 | RC6/TX/CK — PORTC bit 6 / USART TX / clock |
| 腳位 51 | RC7/RX/DT — PORTC bit 7 / USART RX / data |
| 腳位 52 | RD0 — PORTD bit 0 |
| 腳位 53 | RD1 — PORTD bit 1 |
| 腳位 54 | RD2 — PORTD bit 2 |
| 腳位 55 | RD3 — PORTD bit 3 |
| 腳位 56 | RD4 — PORTD bit 4 |
| 腳位 57 | RD5 — PORTD bit 5 |
| 腳位 58 | RD6 — PORTD bit 6 |
| 腳位 59 | RD7 — PORTD bit 7 |
| 腳位 60 | RE0 — PORTE bit 0 |
| 腳位 61 | RE1 — PORTE bit 1 |
| 腳位 62 | RE2 — PORTE bit 2 |
| 腳位 63 | MCLR/VPP — Master clear reset / programming voltage |
| 腳位 64 | SEG16 — LCD Segment 16 output |
| 腳位 65 | SEG17 — LCD Segment 17 output |
| 腳位 66 | SEG18 — LCD Segment 18 output |
| 腳位 67 | SEG19 — LCD Segment 19 output |
| 腳位 68 | NC — Not connected (per datasheet) |
典型應用
PIC16LC925-I/L 適用於 6 應用s: Industrial Control Panel with LCD Readout, Medical Instrument Display, Automotive Dashboard Sub-System, Point-of-Sale Terminal, Consumer Appliance with Character LCD, Battery-Powered Instrumentation.
Industrial Control Panel with LCD Readout
The PIC16LC925-I/L fits industrial control panels because its integrated 96-segment LCD driver eliminates the need for an external display controller, reducing BOM cost and PCB area. With 52 I/O pins the MCU can scan keypads, drive relays, read sensors, and update LCD segments simultaneously, while the -40 C to +85 C industrial temperature range covers most factory environments. Power dissipation is low thanks to the LC CMOS core, simplifying thermal design in sealed enclosures.
推薦
Medical Instrument Display
The PIC16LC925-I/L suits medical instruments such as portable glucometers, blood-pressure monitors, and digital thermometers where a segment LCD readout is required. The 2.5 V to 5.5 V supply range supports battery operation, while the integrated LCD driver with charge pump can directly bias the display glass from a single-cell supply. The 176 bytes of RAM are sufficient for sensor filtering and last-reading storage, and OTP memory locks firmware to support regulatory IP protection requirements.
推薦
Automotive Dashboard Sub-System
The PIC16LC925-I/L works in non-safety automotive sub-systems such as climate-control panels, mirror adjusters, and infotainment secondary displays. Its 52 I/O pins handle button scanning, encoder input, and backlight control, while the LCD driver directly drives the segment glass. The 5 V supply is compatible with automotive 12 V post-regulation rails. For safety-critical or AEC-Q100-qualified applications, Microchip's PIC16F equivalents with automotive grade should be selected instead.
推薦
Point-of-Sale Terminal
The PIC16LC925-I/L supports point-of-sale (POS) terminals by integrating an LCD driver for transaction displays, a USART for receipt printer or networking, and 52 I/O for keypads, card readers, and cash-drawer control. The 20 MHz clock and 7 KB OTP provide ample headroom for menu state machines and encryption subroutines. OTP memory locks the firmware to prevent tampering, supporting PCI-style security requirements at the device level.
推薦
Consumer Appliance with Character LCD
The PIC16LC925-I/L fits consumer appliances such as washing machines, microwave ovens, and air conditioners where a 16x2 or 20x4 character LCD is required. The integrated LCD driver with selectable bias and duty cycle supports common character LCD configurations without external components. The 52 I/O pins handle button matrices, encoder inputs, and triac/relay outputs for motor and heater control, while the OTP memory locks firmware against unauthorized cloning of appliance features.
推薦
Battery-Powered Instrumentation
The PIC16LC925-I/L suits battery-powered instrumentation such as handheld multimeters, portable data loggers, and field-calibration tools. The "LC" low-power CMOS core reduces active current draw, while the integrated LCD driver with internal charge pump can operate the display directly from a 3 V battery without boost circuitry. The 20 MHz clock can be gated down to 32 kHz for sleep-mode current under 1 uA, extending battery life for field-deployed measurement tools.
推薦
推薦產品摘要
工程參考資料，適用於 PIC16LC925-I/L — 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 | PIC16LC925T-I/L | PIC16LC924-04/PT | PIC16F946-I/L | PIC16F946T-I/L | PIC16LC925-I/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 68-PLCC (J-Lead) | 68-PLCC (J-Lead) - same | 68-PLCC (J-Lead) - same | 68-PLCC (J-Lead) - same | 68-PLCC (J-Lead) - same | PDIP-68 (different package, not drop-in) |
| Program Memory | 7 KB OTP | 7 KB OTP | 4 KB OTP (-43%) | 14 KB Flash | 14 KB Flash | 7 KB OTP |
| Memory Type | OTP | OTP | OTP | Flash | Flash | OTP |
| RAM | 176 bytes | 176 bytes | 176 bytes | 336 bytes | 336 bytes | 176 bytes |
| Maximum Clock | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| I/O Pins | 52 | 52 | 52 | 53 | 53 | 52 |
| LCD Driver | Yes (96 segments) | Yes (96 segments) | Yes (96 segments) | Yes (96 segments) | Yes (96 segments) | Yes (96 segments) |
| Operating Voltage | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.5 V to 5.5 V |
| In-Circuit Reprogrammable | No (OTP) | No (OTP) | No (OTP) | Yes (Flash) | Yes (Flash) | No (OTP) |
主要差異化特點
- Integrated 96-segment LCD driver with charge pump (對比PIC16LC924-04/PT)
- Flash memory allows in-circuit reprogramming (對比PIC16F946-I/L)
- Tape-and-reel automated assembly (對比PIC16LC925-I/P)
設計說明
The PIC16LC925-I/L operates from 2.5 V to 5.5 V; for battery applications, the integrated LCD charge pump can generate VLCD voltages from a single 3 V cell, removing the need for an external boost converter. For stable oscillator operation, place a 100 nF decoupling capacitor close to each VDD/VSS pair, with a bulk 10 uF tantalum or ceramic capacitor at the board supply entry. Keep total VDD rise time under 50 ms to ensure proper Power-On Reset behavior.
Route the LCD segment and common lines as short as possible and away from high-frequency digital traces (USART, oscillator) to minimize coupled noise that produces ghosting on the display. Keep the VLCD bias capacitors within 5 mm of the VLCD1/VLCD2/VLCD3 pins. Use a ground plane under the MCU for noise immunity, and route the ICSP clock (PGC) and data (PGD) lines as a differential pair to maintain programming reliability.
OTP memory on PIC16LC925-I/L cannot be erased - a single misconfigured fuse bit or watchdog timeout during firmware development can render the device unusable. Always prototype with a Flash-based PIC16F946-I/L or PIC16F946T-I/L, and only commit to OTP once firmware is fully validated and locked. Be aware that ICSP programming can still occur after the first write, but only to set configuration bits, not to reprogram flash memory.
合規資訊
Compliance status for PIC16LC925-I/L not found in the Verified Web Data. Microchip's industrial-grade MCUs are typically RoHS-compliant; verify with manufacturer before procurement.
