PIC18LC442-I/L - 8-bit MCU, 16KB OTP, 40MHz, 44-PLCC | Microchip
部品番号: PIC18LC442-I/L ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $9.85 | $9.85 |
| 10 | $8.92 | $89.20 |
| 100 | $7.65 | $765.00 |
| 500 | $6.4 | $3,200.00 |
| 1,000 | $5.55 | $5,550.00 |
PIC18LC442-I/L 概要
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (Flash/ROM/OTP), data memory (RAM), and integrated peripherals such as timers, ADCs, and communication interfaces. The PIC18LC442 belongs to the PIC18 family of 8-bit microcontrollers, which sits in Microchip's broader PIC product hierarchy: PIC18 -> PIC microcontrollers -> 8-bit MCUs -> microcontrollers -> integrated circuits -> semiconductors. The 'LC' suffix denotes the low-voltage variant optimized for 3.3V operation, while the 'I' industrial temperature suffix matches all refrigerator variants.
Key differentiating specifications include 16KB (8K x 16) of OTP program memory, 512 bytes of RAM, 33 I/O pins, and a 40 MHz maximum clock speed. The PIC18 core supports a RISC instruction set with 77 instructions and a 16-bit wide instruction word, delivering ~10 MIPS performance at 40 MHz. Integrated peripherals include multiple timers, a 10-bit ADC, USART, and a synchronous serial port (SSP) supporting SPI and I2C. The 44-pin PLCC package provides robust through-hole mounting suitable for industrial and legacy designs.
The PIC18LC442 architecture uses a 16-bit program memory bus with 8-bit data path, enabling efficient C compiler support while preserving the deterministic behavior of the PIC legacy. The 'LC' low-voltage core allows operation down to 2.5V, suiting battery-powered and 3-ULP applications. The OTP memory is one-time programmable, meaning each device can be written exactly once - making this part cost-effective for high-volume production but unsuited to field firmware updates.
Typical applications include industrial control systems, legacy embedded designs, motor control front-ends, sensor signal processing, and consumer electronics where 8-bit processing is sufficient. Its through-hole 44-PLCC package suits test fixtures and hand-soldered prototypes, while the LC voltage range covers both 3.3V and 5V rails.
When designing with this device, observe that OTP memory requires code to be fully validated before programming. Ensure the supply rail stays within 2.5V-5.5V; for 5V-only operation, use the PIC18C442 or PIC18F442 variants. The 44-PLCC socket allows easy firmware swap in development.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives across the PIC18 family, and practical design notes not aggregated in a single manufacturer datasheet view.
ドロップイン代替品: PIC18LC442-I/L — 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: PIC18LC442-I/L （同一形状・フットプリント） — 相違点: Mounting Type, Package, Core Architecture, Instruction Set, Operating Temperature Range.
クイック比較ツール — 並列比較する代替部品を選択:
PIC18F442-I/L
✅ ドロップイン✓ 在庫あり
$3.75 / 個
データシートを見る →PIC18C442-I/L
✅ ドロップイン📋 参考代替品（カタログ未掲載）
PIC18LF442-I/L
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$6.28 / 個
データシートを見る →PIC18F452-I/L
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$6.85 / 個
データシートを見る →PIC18F458-I/L
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$4.79 / 個
データシートを見る →PIC18LC442-I/L 最大定格＆電気的特性
| Core Architecture | PIC 8-bit (Harvard, 16-bit instruction) |
| Family | PIC18 |
| Series | PIC18C |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 16 KB (8K x 16) |
| RAM Size | 512 bytes |
| 最大クロック周波数 | 40 MHz |
| Operating Voltage (LC variant) | 2.5 V to 5.5 V |
| Number of I/O Pins | 33 |
| Communication Interfaces | USART, SSP (SPI/I2C) |
| パッケージ / ケース | 44-LCC (J-Lead), 16.59 x 16.59 mm |
| 実装タイプ | Through-Hole (PLCC socket) |
| 動作温度 | -40 C to +85 C (Industrial) |
| Instruction Set | 77 instructions, RISC |
PIC18LC442-I/L ピン構成
| ピン 1 | MCLR — Master Clear (reset) input, active low |
| ピン 2 | RA0/AN0 — PORTA bit0 / Analog input 0 |
| ピン 3 | RA1/AN1 — PORTA bit1 / Analog input 1 |
| ピン 4 | RA2/AN2 — PORTA bit2 / Analog input 2 |
| ピン 5 | RA3/AN3/VREF+ — PORTA bit3 / Analog input 3 / ADC VREF+ |
| ピン 6 | RA4/T0CKI — PORTA bit4 / Timer0 clock input |
| ピン 7 | RA5/AN4/SS — PORTA bit5 / Analog input 4 / SPI slave select |
| ピン 8 | RE0/RD/AN5 — PORTE bit0 / Read control / Analog input 5 |
| ピン 9 | RE1/WR/AN6 — PORTE bit1 / Write control / Analog input 6 |
| ピン 10 | RE2/CS/AN7 — PORTE bit2 / Chip select / Analog input 7 |
| ピン 11 | VDD — Positive supply (2.5V-5.5V) |
| ピン 12 | VSS — Ground reference |
| ピン 13 | OSC1/CLKIN — Oscillator input / external clock in |
| ピン 14 | OSC2/CLKOUT — Oscillator output / clock out |
| ピン 15 | RC0/T1OSO/T1CKI — PORTC bit0 / Timer1 oscillator out / Timer1 clock in |
| ピン 16 | RC1/T1OSI/CCP2 — PORTC bit1 / Timer1 oscillator in / CCP2 PWM |
| ピン 17 | RC2/CCP1 — PORTC bit2 / CCP1 PWM output |
| ピン 18 | RC3/SCK/SCL — PORTC bit3 / SPI clock / I2C clock |
| ピン 19 | RD0/PSP0 — PORTD bit0 / Parallel Slave Port bit0 |
| ピン 20 | RD1/PSP1 — PORTD bit1 / Parallel Slave Port bit1 |
| ピン 21 | RD2/PSP2 — PORTD bit2 / Parallel Slave Port bit2 |
| ピン 22 | RD3/PSP3 — PORTD bit3 / Parallel Slave Port bit3 |
| ピン 23 | RC4/SDI/SDA — PORTC bit4 / SPI data in / I2C data |
| ピン 24 | RC5/SDO — PORTC bit5 / SPI data out |
| ピン 25 | RC6/TX/CK — PORTC bit6 / USART TX / USART clock |
| ピン 26 | RC7/RX/DT — PORTC bit7 / USART RX / USART data |
| ピン 27 | RD4/PSP4 — PORTD bit4 / Parallel Slave Port bit4 |
| ピン 28 | RD5/PSP5 — PORTD bit5 / Parallel Slave Port bit5 |
| ピン 29 | RD6/PSP6 — PORTD bit6 / Parallel Slave Port bit6 |
| ピン 30 | RD7/PSP7 — PORTD bit7 / Parallel Slave Port bit7 |
| ピン 31 | VSS — Ground reference |
| ピン 32 | VDD — Positive supply (2.5V-5.5V) |
| ピン 33 | RB0/INT0 — PORTB bit0 / External interrupt 0 |
| ピン 34 | RB1/INT1 — PORTB bit1 / External interrupt 1 |
| ピン 35 | RB2/INT2 — PORTB bit2 / External interrupt 2 |
| ピン 36 | RB3/CCP2 — PORTB bit3 / CCP2 (alternate) |
| ピン 37 | RB4 — PORTB bit4 (interrupt-on-change) |
| ピン 38 | RB5 — PORTB bit5 (interrupt-on-change) |
| ピン 39 | RB6/PGC — PORTB bit6 / ICSP clock |
| ピン 40 | RB7/PGD — PORTB bit7 / ICSP data |
| ピン 41 | NC — Not connected |
| ピン 42 | NC — Not connected |
| ピン 43 | NC — Not connected |
| ピン 44 | NC — Not connected |
主な用途
PIC18LC442-I/L の用途: 7 件s: Industrial Control Systems, Legacy Embedded Consumer Electronics, Motor Control and Drive Homing, Sensor Signal Processing and Data Acquisition, HVAC and Building Automation, Test Fixtures and ATE Equipment, Automotive Body and Comfort Electronics.
Industrial Control Systems
The PIC18LC442-I/L is well-suited for industrial control front-ends thanks to its 33 GPIO pins, 40 MHz core clock (~10 MIPS), and 2.5V-5.5V wide-voltage operation. In a motor drive, the MCU reads encoder inputs on PORTA, drives PWM outputs on PORTB/PORTC for the inverter stage, and exchanges data with the host PLC over USART. The 16 KB OTP memory holds the PID control loop, fault-handling state machine, and serial protocol stack with deterministic interrupt response within 100 ns. Compared to a 5V-only PIC18C442, the LC variant tolerates brownouts and 3.3V sensor rails on the same board without level shifters.
おすすめ
Legacy Embedded Consumer Electronics
PIC18LC442-I/L's OTP memory and 44-PLCC through-hole package suit legacy consumer products where firmware is finalized and field updates are not required. In a washing machine controller, the MCU sequences the wash cycle, drives the triac outputs on PORTB, reads water-level and temperature sensors on the ADC, and displays status on a multiplexed 7-segment panel via PORTC. The 44-PLCC socket allows the manufacturer to program and verify firmware at the line, then ship fully-tested modules. The LC variant's 2.5V floor is helpful when the appliance uses a 3.3V backup battery for power-loss memory retention.
おすすめ
Motor Control and Drive Homing
The PIC18LC442-I/L fits cost-optimized motor control thanks to its 40 MHz clock, integrated PWM-capable CCP modules, and 33 I/O for H-bridge gate drive and feedback. In a BLDC ceiling fan controller, the MCU runs a sensorless back-EMF commutation algorithm on PORTA, drives the MOSFET half-bridge on PORTB/PORTC, and modulates speed via a triac-dimmer interface on the ADC. At 40 MHz, the 10 MIPS throughput sustains the commutation ISR within the 50 us electrical cycle window with margin for housekeeping. The 2.5V-5.5V range accommodates 3.3V Hall-sensor or back-EMF comparator supplies.
おすすめ
Sensor Signal Processing and Data Acquisition
PIC18LC442-I/L is suitable for multi-channel data acquisition nodes where its integrated ADC, USART, and 33 GPIO handle 8-12 analog/digital channels at moderate sampling rates. In a remote environmental monitor, the MCU reads temperature/humidity/gas sensors on the ADC, time-stamps with the RTCC, stores burst data in the 512-byte RAM, and transmits via USART to a host logger. The 40 MHz clock sustains 100 kHz ADC throughput with averaging. The 2.5V floor suits solar/battery power; the OTP memory is acceptable since the firmware is fixed. For OTA firmware support, migrate to PIC18F442-I/L (Flash).
おすすめ
HVAC and Building Automation
The PIC18LC442-I/L is appropriate for HVAC zone controllers where its 33 I/O drive thermostats, dampers, and LCD displays, and the 40 MHz core runs the scheduling logic. In a multi-zone rooftop unit controller, the MCU reads zone setpoints via SPI from a touch controller, drives TRIAC outputs on PORTB for damper motors, reads temperature via the ADC, and exchanges BACnet/Modbus over USART. The 16 KB OTP holds the schedule algorithm and serial protocol stack; the 512-byte RAM is sufficient for zone state. The 44-PLCC package suits the through-hole industrial assembly line. The wide 2.5V-5.5V range accommodates 24VAC-derived DC rails after rectification.
おすすめ
Test Fixtures and ATE Equipment
The PIC18LC442-I/L is a strong fit for in-circuit test (ICT) fixtures and bench-top ATE where its 44-PLCC socket allows fast device swap, and its deterministic PIC18 core delivers repeatable timing for go/no-go tests. In a bed-of-nails production tester, the MCU drives relay scan matrix via PORTB/PORTC, measures DUT pins via comparator/ADC on PORTA, and reports results over USART to the host PC. The OTP memory guarantees the test program cannot be accidentally overwritten during fixture bring-up. The industrial -40C to +85C temperature range supports factory-floor operation. For firmware flexibility during test-program development, use PIC18F442-I/L on the fixture.
おすすめ
Automotive Body and Comfort Electronics
While the PIC18LC442-I/L is not AEC-Q100 qualified, the wider PIC18 family supports body/comfort applications where 8-bit processing suffices. In an aftermarket central-locking controller, the MCU drives 4 door actuators via H-bridge outputs on PORTB, reads lock-position switches on the ADC, and exchanges LIN-bus messages over USART. The 16 KB OTP holds the locking algorithm; the 512-byte RAM buffers state. For OEM automotive, choose PIC18F458-I/L (CAN) or PIC18F46K22 (AEC-Q100). The 2.5V-5.5V range tolerates 12V-battery brownouts down to crank voltage. The 44-PLCC through-hole package eases automotive repair-shop rework.
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: PIC18LC442-I/L — 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 | PIC18F442-I/L | PIC18C442-I/L | PIC18LF442-I/L | PIC18F452-I/L | PIC18F458-I/L |
|---|---|---|---|---|---|---|
| Package | 44-PLCC (J-Lead) | 44-PLCC - same | 44-PLCC - same | 44-PLCC - same | 44-PLCC - same | 44-PLCC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 16 KB OTP | 16 KB Flash | 16 KB OTP | 16 KB Flash | 32 KB Flash | 32 KB Flash |
| Operating Voltage | 2.5 V - 5.5 V | 4.2 V - 5.5 V | 4.5 V - 5.5 V | 2.0 V - 5.5 V | 4.2 V - 5.5 V | 4.2 V - 5.5 V |
| Max Clock Frequency | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| RAM | 512 bytes | 512 bytes | 512 bytes | 512 bytes | 1536 bytes | 1536 bytes |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 |
| Memory Type | OTP (one-time) | Flash (reprogrammable) | OTP (one-time) | Flash (reprogrammable) | Flash (reprogrammable) | Flash (reprogrammable) |
| Lifecycle | NRND | Active | NRND | Active | Active | Active |
| Approx. Unit Price (qty 100) | $7.65 | $8.50 | $7.20 | $9.10 | $9.80 | $10.40 |
主な差別化要因
- Low-voltage 2.5V-5.5V operation vs 5V-only PIC18C442 （vs PIC18C442-I/L)
- Industry-standard drop-in Flash alternative available （vs PIC18F442-I/L)
- Wider voltage range than PIC18F442-I/L （vs PIC18F442-I/L)
- Higher program memory than PIC18LC442 （vs PIC18F452-I/L)
設計ノート
The PIC18LC442-I/L operates from 2.5V to 5.5V. Both VDD pins (11 and 32) must be tied together and decoupled with 100 nF ceramic capacitors placed within 5 mm of each VDD pin. Add a bulk 10 uF tantalum or aluminum-polymer capacitor at the supply entry point. For brownout-sensitive applications, use the on-chip Brown-out Reset (BOR) feature configured via the configuration word; otherwise, the MCU may execute errant code when VDD dips below 2.5V. The LC variant's 2.5V minimum is the design constraint - never operate below this threshold or the program counter may jump into invalid memory.
The 44-PLCC package mounts in a through-hole PLCC socket (e.g., 44-pin 0.05 in pitch socket). Place a 0.1 uF decoupling capacitor on each VDD pin and a 10 uF bulk capacitor near the MCU. Keep the OSC1/OSC2 traces short (under 10 mm) and route them symmetrically to avoid duty-cycle distortion on CLKOUT. Ground plane under the MCU improves EMI; ensure all VSS pins (12 and 31) are tied together with a low-impedance trace or plane. For ICD (in-circuit debugger) support, route PGC (RB6) and PGD (RB7) to a 6-pin header with no series resistors on the production board; resistors can be added for EMI but must be removable for debug.
Critical pitfalls when using PIC18LC442-I/L: (1) OTP memory cannot be erased - verify firmware thoroughly on a PIC18F442-I/L emulator part before committing to PIC18LC442-I/L production programming; (2) the part is NRND (Not Recommended for New Designs) - confirm Microchip will not issue an EOL notice within your product lifecycle, or migrate to PIC18F442-I/L (Flash, same pinout) for new designs; (3) configuration bits (CONFIG1L through CONFIG4L) must be programmed correctly - an unconfigured oscillator or watchdog setting can brick the part permanently since OTP cannot be re-written; (4) the ICSP clock/data pins (RB6/RB7) are shared with PORTB - ensure the in-circuit programmer is disconnected or the RB6/RB7 load does not exceed 25 mA during normal operation.
The PIC18LC442-I/L GPIO pins have limited slew-rate control; for high-speed switching signals (e.g., SPI at 10 MHz or above), use series resistors (22-33 ohm) close to the MCU pin to dampen reflections on the trace. The USART TX/RX pins (RC6/RC7) are 5V-tolerant in 5V mode but only 3.3V-tolerant in 3.3V mode - confirm signal levels before connecting to a 5V peripheral. The analog inputs (PORTA) should be bypassed with 100 nF to AVSS when not used as ADC channels, to prevent digital switching noise from coupling into the ADC readings.
コンプライアンス情報
RoHS, REACH, lead-free, and halogen-free status not stated in verified distributor data. Microchip PIC18 family is generally RoHS-compliant for current production but the PIC18LC442-I/L predates many compliance mandates. AEC-Q100 not qualified - choose PIC18F458 or PIC18F46K22 for automotive.
