PIC18LC252-I/SO - 8-Bit 40MHz 32KB OTP MCU | Microchip
部品番号: PIC18LC252-I/SO ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $3.98 | $3.98 |
| 10 | $3.58 | $35.80 |
| 100 | $3.19 | $319.00 |
| 500 | $2.86 | $1,430.00 |
| 1,000 | $2.55 | $2,550.00 |
PIC18LC252-I/SO 概要
An 8-bit microcontroller (MCU) is a programmable logic device built around an 8-bit data path that executes simple instructions at low-to-moderate clock speeds, typically used in embedded control applications. Within the semiconductor hierarchy, the PIC18LC252 sits under: microcontroller -> embedded processor -> integrated circuit (IC) -> semiconductor. It uses Harvard architecture (separate program and data buses) and RISC instruction set with only 77 single-word instructions, simplifying firmware development and reducing code size relative to CISC 8-bit alternatives.
Key features include a 10-bit ADC, multiple timers, USART, SPI, and I2C peripherals, plus industrial-grade operating temperature of -40 °C to +85 °C. The "LC" suffix indicates a low-voltage core (2.5 V to 5.5 V operation) suitable for battery-powered designs. Hardware multiplier, 16-bit wide instruction word, and 32 KB program storage make this device suitable for moderately complex control firmware. The 28-SOIC package offers easy hand-soldering and broad compatibility with through-hole-style prototyping on SMD adapter PCBs.
The PIC18LC252-I/SO uses an OTP program memory architecture, meaning firmware is permanently written during manufacturing or in-system programming and cannot be erased. This contrasts with FLASH-based siblings (PIC18F252) which support in-application reprogramming. PIC18 microcontrollers are upwards compatible across the family, allowing code migration to higher pin-count or larger memory variants without architectural changes.
Typical applications include industrial control systems, sensor signal conditioning, motor control interfaces, low-power instrumentation, and legacy embedded product retrofits. The industrial temperature range and OTP memory target cost-sensitive, high-volume, field-deployed products where firmware revision is finalized at production time.
When designing with this device, note that OTP memory cannot be field-upgraded - choose the PIC18F252 flash-based variant if firmware revision is anticipated. The 28-SOIC footprint is shared with PIC18F242/F252, allowing PCB layout reuse between prototype (FLASH) and production (OTP) builds.
This page synthesizes distributor pricing, pin-compatible alternatives across PIC18C/F families, and practical OTP vs FLASH selection guidance not found in the manufacturer datasheet alone.
ドロップイン代替品: PIC18LC252-I/SO — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: PIC18LC252-I/SO （同一形状・フットプリント） — 相違点: ADC, Package, Core Architecture, RoHS Status, Operating Temperature.
クイック比較ツール — 並列比較する代替部品を選択:
PIC18F252-I/SO
✅ ドロップイン✓ 在庫あり
$3.95 / 個
データシートを見る →PIC18LC242T-I/SO
✅ ドロップイン✓ 在庫あり
$5.42 / 個
データシートを見る →PIC18LC242-I/SO
✅ ドロップイン✓ 在庫あり
$2.75 / 個
データシートを見る →PIC18F242-I/SO
✅ ドロップイン✓ 在庫あり
$3.5 / 個
データシートを見る →PIC18F252T-I/SO
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$6.91 / 個
データシートを見る →PIC18C252-I/SO
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
PIC18LC252-I/SO 最大定格＆電気的特性
| Manufacturer | Microchip Technology |
| Series | PIC® 18C |
| Core Architecture | 8-bit RISC (Harvard) |
| Core Processor | PIC |
| Instruction Set Width | 16-bit (16K x 16 = 32 KB) |
| Program Memory Type | OTP (One-Time-Programmable) |
| Program Memory Size | 32 KB (16K x 16) |
| RAM Size | 1536 bytes |
| 最大クロック周波数 | 40 MHz |
| Performance | 10 MIPS (100 ns instruction execution) |
| Number of I/O Pins | 23 |
| ADC | 10-bit |
| Supply Voltage Range | 2.5 V to 5.5 V (LC low-voltage core) |
| 動作温度範囲 | -40 °C to +85 °C (Industrial) |
| パッケージ | 28-SOIC (0.295", 7.50 mm body width) |
| 実装タイプ | Surface Mount |
| Number of Instructions | 77 single-word instructions |
| RoHS ステータス | See compliance info |
| ピン数 | 28 |
PIC18LC252-I/SO ピン構成
| ピン 1 | MCLR/VPP/RE3 — Master Clear (reset) input / programming voltage / digital input RE3 |
| ピン 2 | RA0/AN0 — PORTA bit 0 / analog input channel 0 |
| ピン 3 | RA1/AN1 — PORTA bit 1 / analog input channel 1 |
| ピン 4 | RA2/AN2/VREF- — PORTA bit 2 / analog input channel 2 / ADC VREF- |
| ピン 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input channel 3 / ADC VREF+ |
| ピン 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| ピン 7 | RA5/AN4/SS/LVDIN — PORTA bit 5 / analog input / SPI slave select / LVD input |
| ピン 8 | OSC2/CLKO/RA6 — Crystal output / clock output / PORTA bit 6 |
| ピン 9 | OSC1/CLKI/RA7 — Crystal input / clock input / PORTA bit 7 |
| ピン 10 | VSS — Ground reference |
| ピン 11 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| ピン 12 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| ピン 13 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM 1 |
| ピン 14 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| ピン 15 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| ピン 16 | RC5/SDO — PORTC bit 5 / SPI data out |
| ピン 17 | RC6/TX/CK — PORTC bit 6 / USART TX / USART clock |
| ピン 18 | RC7/RX/DT — PORTC bit 7 / USART RX / USART data |
| ピン 19 | VSS — Ground reference |
| ピン 20 | VDD — Positive supply voltage |
| ピン 21 | RB0/INT0 — PORTB bit 0 / external interrupt 0 |
| ピン 22 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| ピン 23 | RB2/INT2 — PORTB bit 2 / external interrupt 2 |
| ピン 24 | RB3/INT3 — PORTB bit 3 / external interrupt 3 |
| ピン 25 | RB4 — PORTB bit 4 |
| ピン 26 | RB5/PGM — PORTB bit 5 / LVP programming input |
| ピン 27 | RB6/PGC — PORTB bit 6 / ICSP clock |
| ピン 28 | RB7/PGD — PORTB bit 7 / ICSP data |
主な用途
PIC18LC252-I/SO の用途: 6 件s: Industrial Control Systems, Home Appliance Controllers, Automotive Body Electronics, Sensor Signal Conditioning Hubs, Battery-Powered Portable Devices, Legacy Embedded Product Retrofits.
Industrial Control Systems
The PIC18LC252-I/SO fits industrial control systems through its 10 MIPS performance, 32 KB OTP program memory, and 23 I/O pins supporting sensors, relays, and actuators. Its industrial temperature range of -40 °C to +85 °C and 2.5 V - 5.5 V supply tolerate factory floor conditions, while the 10-bit ADC handles analog sensor inputs directly. The OTP memory suits fixed-function industrial controllers where firmware is finalized at production. Per the Microchip datasheet, typical use includes PLC I/O modules, motor starters, and process control loops.
おすすめ
Home Appliance Controllers
The PIC18LC252-I/SO serves home appliance controllers via OTP memory for locked firmware, 32 KB code space for washing machine or microwave logic, and 23 I/O pins driving user interfaces, displays, and motor relays. The 2.5 V to 5.5 V supply range matches battery-backed and line-powered designs, while industrial temperature tolerance handles appliance environments. Per Microchip application notes, OTP reduces per-unit cost for high-volume white goods production. The 28-SOIC package is hand-solder-friendly for prototyping service replacement modules.
おすすめ
Automotive Body Electronics
The PIC18LC252-I/SO addresses non-safety automotive body electronics through 32 KB OTP memory for locked firmware and industrial -40 °C to +85 °C temperature tolerance suitable for cabin and body modules. The 10-bit ADC and 23 I/O pins interface with switches, sensors, and LED drivers for interior lighting, seat controllers, and accessory multiplex nodes. Note that this part is NOT AEC-Q100 qualified; for AEC-Q100 applications the PIC18F252-I/SO with automotive suffix is required per Microchip product documentation.
おすすめ
Sensor Signal Conditioning Hubs
The PIC18LC252-I/SO operates as a sensor signal conditioning hub by digitizing analog sensor inputs through its 10-bit ADC and applying calibration/linearization in firmware across 32 KB of code space. The 40 MHz clock and 10 MIPS throughput enable real-time filtering algorithms for pressure, flow, and temperature sensors. Per Microchip application literature, the LC core's 2.5 V minimum supply suits battery-powered wireless sensor nodes. The 23 I/O pins multiplex to multiple sensor channels and communication peripherals.
おすすめ
Battery-Powered Portable Devices
The PIC18LC252-I/SO is well-suited for battery-powered portable devices owing to its LC low-voltage core that operates down to 2.5 V, enabling direct connection to 2x AA alkaline or single Li-ion cells. The OTP memory suits disposable or non-upgradable consumer products, while 32 KB program memory handles display control, button scanning, and low-power timer routines. Per the Microchip datasheet, the LC variant offers reduced core current versus the standard C variant, extending battery life in remote controls, toys, and portable meters.
おすすめ
Legacy Embedded Product Retrofits
The PIC18LC252-I/SO supports legacy embedded product retrofits through its PIC18 instruction set compatibility and 28-SOIC footprint shared with the broader PIC18F242/F252 family. Designs originally built on PIC16 or older PIC18 OTP parts can migrate to the LC252 for additional code space (32 KB) and peripheral integration. Per Microchip migration guides, the LC core's 2.5 V - 5.5 V operation allows retrofit into existing power rails without redesign. The pin-compatible FLASH alternatives simplify firmware updates during service events.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: PIC18LC252-I/SO — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | PIC18F252-I/SO | PIC18LC242-I/SO | PIC18LC242T-I/SO | PIC18F242-I/SO | PIC18F252T-I/SO | PIC18C252-I/SO |
|---|---|---|---|---|---|---|---|
| Package | 28-SOIC | 28-SOIC (same) | 28-SOIC (same) | 28-SOIC (same) | 28-SOIC (same) | 28-SOIC (same) | 28-SOIC (same) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory Type | OTP | FLASH (reprogrammable) | OTP | OTP | FLASH (reprogrammable) | FLASH (reprogrammable) | OTP |
| Program Memory Size | 32 KB (16K x 16) | 32 KB FLASH | 16 KB (-50%) | 16 KB (-50%) | 16 KB (-50%) | 32 KB FLASH | 32 KB OTP |
| Supply Voltage Range | 2.5 V to 5.5 V (LC) | 2.0 V to 5.5 V (F) | 2.5 V to 5.5 V (LC) | 2.5 V to 5.5 V (LC) | 2.0 V to 5.5 V (F) | 2.0 V to 5.5 V (F) | 4.2 V to 5.5 V (C, standard) |
| Maximum Clock Frequency | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| I/O Pins | 23 | 23 | 23 | 23 | 23 | 23 | 23 |
| Lifecycle Status | Obsolete | Active | Obsolete | Obsolete | Active | Active | Obsolete |
主な差別化要因
- Active FLASH replacement available with identical footprint （vs PIC18F252-I/SO)
- Same 28-SOIC footprint at half the memory for cost-down （vs PIC18LC242-I/SO)
- Lower-voltage 2.5 V minimum supply vs standard C core （vs PIC18C252-I/SO)
設計ノート
OTP memory cannot be field-upgraded. Once the firmware is written, no further revisions are possible without physically replacing the chip. For prototypes, beta programs, or products with evolving firmware, use the FLASH-based PIC18F252-I/SO instead - it shares the identical 28-SOIC footprint and pinout, allowing PCB layout reuse. Estimated: a typical OTP-to-FLASH BOM swap requires no PCB changes when the same 28-SOIC package is used.
The LC low-voltage core supports 2.5 V - 5.5 V operation, but brown-out and low-voltage detect (LVD) thresholds must be configured per the application. Per the Microchip datasheet, configure BOR/LVD in the configuration words to prevent code corruption during supply voltage dips. Add a 100 nF decoupling capacitor close to VDD (pin 20) and a bulk 10 uF capacitor at the supply rail; Estimated: typical LC252 active current at 40 MHz / 5 V is around 15-20 mA, scaling down at lower clock and voltage.
Place the 28-SOIC decoupling capacitors (100 nF ceramic) within 3 mm of VDD (pin 20) and VSS (pins 10, 19). Route the crystal/oscillator traces (OSC1/OSC2, pins 8-9) symmetrically and short to minimize EMI. Use a ground pour under the device and avoid running high-frequency signals under the SOIC body. For programming header access, dedicate either RB6/RB7 (PGC/PGD) or MCLR (pin 1) for ICSP connectivity per Microchip development guidelines.
コンプライアンス情報
RoHS/REACH/lead-free status not present in the verified web data; set to unknown. AEC-Q100 marked not_applicable as the standard PIC18LC252 is industrial-grade; for automotive applications choose a Q-suffix or AEC-Q100 qualified variant. Conflict-minerals compliance is per Microchip Technology corporate policy.
