PIC16LC77T-04/L - 4MHz 8-bit OTP MCU 14KB Flash 44-PLCC | Microchip
部品番号: PIC16LC77T-04/L ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $8.5 | $8.50 |
| 10 | $7.65 | $76.50 |
| 100 | $6.8 | $680.00 |
| 500 | $6.1 | $3,050.00 |
| 1,000 | $5.45 | $5,450.00 |
PIC16LC77T-04/L 概要
An 8-bit PIC microcontroller (MCU) is a small, low-power computer-on-a-chip built around a Harvard-architecture RISC CPU with separate program and data buses, a fixed instruction set, and integrated peripherals such as timers, A/D converters, and serial interfaces. Within the broader taxonomy, this device sits at: PIC16C7X -> PIC16 family -> PIC microcontroller -> 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. PIC mid-range MCUs are widely used for deterministic, low-cost control applications because the 14-bit instruction word keeps code density high while the RISC pipeline delivers predictable interrupt latency.
Key differentiating specifications of the PIC16LC77T-04/L include 14 KB OTP program memory organized as 8K x 14 bits, 368 bytes of data RAM, 33 I/O pins with high-current sink/source capability, an integrated 8-bit A/D converter with up to 8 input channels, two 8-bit timers plus one 16-bit timer, a USART for asynchronous/synchronous serial communication, and a master/slave SSP. The 44-pin PLCC package provides a socket-replaceable, surface-mount form factor useful for prototyping and field serviceability.
Architecturally, the device uses a RISC core with 35 single-cycle instructions, a 14-bit instruction word, and a 4 MHz internal clock that yields a 250 ns instruction cycle. The Brown-out Reset (BOR), Power-on Reset (POR), and Watchdog Timer (WDT) with on-chip RC oscillator provide reliable operation in electrically noisy industrial environments, while the wide operating voltage range (typically 2.5 V to 6.0 V for the LC variant) supports both 3.3 V and 5 V system rails.
Typical applications include industrial process control, motor control front-ends, instrumentation data acquisition, security system panels, automotive body electronics (non-safety), HVAC controllers, and general-purpose embedded control. The combination of OTP memory, integrated ADC, and USART also suits remote sensor hubs and simple human-machine interface (HMI) controllers.
When designing with this part, note that OTP memory cannot be electrically erased - prototypes should use the windowed (UV-erasable) PIC16LC77-04/L variant during development, and production code must be fully verified before programming. Decoupling should include a 0.1 µF ceramic capacitor placed within 5 mm of the VDD pin, with a 10 µF bulk capacitor at the regulator output.
This page synthesizes distributor availability, drop-in same-package alternatives, AEO-optimized FAQ answers, and practical design notes that complement the manufacturer datasheet and help engineers quickly assess fit, sourcing risk, and PCB-level integration.
ドロップイン代替品: PIC16LC77T-04/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: PIC16LC77T-04/L （同一形状・フットプリント） — 相違点: Core Architecture, Timers, Package, Program Memory Size, ADC.
クイック比較ツール — 並列比較する代替部品を選択:
PIC16LC77-04/L
✅ ドロップイン✓ 在庫あり
$6.2 / 個
データシートを見る →PIC16C77-04/L
✅ ドロップイン✓ 在庫あり
$5.98 / 個
データシートを見る →PIC16LC74A-04/PQ
✅ ドロップイン✓ 在庫あり
$2.43 / 個
データシートを見る →PIC16LC74BT-04I/PQ
✅ ドロップイン✓ 在庫あり
$10.5 / 個
データシートを見る →PIC16F877A-I/LG
✅ ドロップイン✓ 在庫あり
$4.78 / 個
データシートを見る →PIC16LC77T-04/L 最大定格＆電気的特性
| Core Architecture | PIC16C mid-range 8-bit RISC |
| Instruction Set Word Width | 14-bit |
| Maximum CPU Clock | 4 MHz |
| Instruction Cycle Time | 250 ns (at 4 MHz) |
| Program Memory Type | OTP (One-Time-Programmable) |
| Program Memory Size | 14 KB (8K x 14 instructions) |
| Data RAM | 368 bytes |
| I/O Pins | 33 |
| Operating Voltage Range | 3.0 V to 6.0 V (LC variant; 5 V nominal) |
| A/D Converter | 8-bit, up to 8 channels |
| Timers | Two 8-bit + one 16-bit |
| Serial Interfaces | USART + Synchronous Serial Port (SSP) |
| パッケージ | 44-pin PLCC (J-Lead, 16.59 x 16.59 mm) |
| 実装タイプ | Surface Mount (PLCC socket compatible) |
| 動作温度 | 0 C to +70 C (commercial) |
| Lead-Free / RoHS | Depends on date code - verify before use |
| Special Features | Brown-out Reset, Power-on Reset, Watchdog Timer, ICD support |
PIC16LC77T-04/L 44-pin plcc (j-lead, 16.59 x 16.59 mm) ピン配置ガイド
PIC16LC77T-04/L (44-pin plcc (j-lead, 16.59 x 16.59 mm) パッケージ) のピン配置。 このデジタルICには、GPIO、通信インターフェース (UART、SPI、I2C)、および電源ピンが含まれています。代替ピン機能と設定オプションについては、メーカーのデータシートを参照してください。組み込みシステム設計とPCBレイアウトに不可欠です。
詳細なピン配置データはありません: PIC16LC77T-04/L.
詳細は データシート をご参照ください。
主な用途
PIC16LC77T-04/L の用途: 6 件s: Industrial Process Control, HVAC Control Systems, Security and Alarm Panels, Motor Control Front-End, Data Acquisition Modules, Human-Machine Interface (HMI) Controllers.
Industrial Process Control
The PIC16LC77T-04/L fits industrial process controllers because its 8-bit ADC, 33 I/O pins, and 14 KB OTP memory support multi-channel sensor acquisition and deterministic actuator control on 3.3 V or 5 V rails. The 250 ns instruction cycle allows sub-millisecond response loops at the 4 MHz clock, while the 368-byte RAM accommodates small PID state structures. Compared with the modern PIC16F877A, this OTP variant is preferred where firmware stability and field-proven code are mandatory.
おすすめ
HVAC Control Systems
For HVAC controllers, the PIC16LC77T-04/L provides the integrated ADC needed for thermistor and pressure transducer inputs, plus PWM-capable CCP modules for driving fan motors and damper actuators. The 33 I/O pins support keypad input, multi-digit seven-segment display output, and relay switching interfaces. The 3.0 V to 6.0 V operating voltage range simplifies 5 V relay supply design and broadens compatibility with 24 VAC-derived DC rails after rectification and regulation.
おすすめ
Security and Alarm Panels
In security panels, the PIC16LC77T-04/L manages multiple zone loops via its ADC and digital inputs, drives piezo buzzers and LED indicators through PWM and standard I/O, and communicates with central stations through the integrated USART. The brown-out reset and watchdog timer provide the supervisory reliability required by UL-listed alarm installations, and the OTP memory prevents firmware tampering in field-deployed units. The 368-byte RAM easily handles zone-state tables and event logs.
おすすめ
Motor Control Front-End
For low-power motor drives such as small BLDC or stepper control boards, the PIC16LC77T-04/L provides the 16-bit timer and CCP modules needed for closed-loop commutation and PWM generation at up to 4 MHz instruction throughput. Its 33 I/O pins drive half-bridge gate drivers and read Hall-effect sensor feedback, while the USART enables command and telemetry to a host controller. This OTP MCU is well suited for cost-sensitive appliance motion control where firmware is locked at production.
おすすめ
Data Acquisition Modules
For small-channel data loggers and remote sensor hubs, the PIC16LC77T-04/L uses its 8-channel 8-bit ADC and integrated USART to digitize analog inputs and forward readings to a host or GSM modem. The 368-byte RAM acts as a sample buffer between acquisition and asynchronous transmission, while the 14 KB OTP holds the acquisition schedule and serial protocol stack. Low-voltage LC operation (down to 3.0 V) enables battery-powered deployments with a 3.3 V regulator.
おすすめ
Human-Machine Interface (HMI) Controllers
The PIC16LC77T-04/L is well suited to small HMI controllers driving character LCDs, keypad matrices, and status LEDs in industrial equipment. Its 33 I/O pins directly interface a 4x4 keypad, a 16x2 character LCD, and LED arrays without external I/O expanders. The CCP modules generate tones for piezo feedback, and the 14 KB OTP memory stores the menu state machine and keymap tables. For new designs, the modern PIC16F877A-I/L with flash and ICD debugging is preferred, but this OTP part remains ideal for production-locked HMIs.
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: PIC16LC77T-04/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 | PIC16LC77-04/L | PIC16C77-04/L | PIC16F877A-I/L |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-PLCC (J-Lead) | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same |
| Program Memory | 14 KB OTP | 14 KB OTP | 14 KB OTP | 14 KB Flash |
| Max Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 20 MHz |
| Operating Voltage | 3.0 V to 6.0 V (LC) | 3.0 V to 6.0 V (LC) | 4.5 V to 6.0 V | 2.0 V to 5.5 V (LF) |
| Data RAM | 368 bytes | 368 bytes | 368 bytes | 368 bytes |
| ADC Resolution | 8-bit | 8-bit | 8-bit | 10-bit |
| Memory Type | OTP | OTP | OTP | Flash |
| Lifecycle Status | NRND | NRND | NRND | Active |
主な差別化要因
- Tape & Reel packaging for high-volume SMT assembly （vs PIC16LC77-04/L)
- Low-voltage LC variant supporting 3.3 V operation （vs PIC16C77-04/L)
- OTP program memory for production-locked firmware （vs PIC16F877A-I/L)
設計ノート
Estimated: the PIC16LC77T-04/L draws up to 25 mA at 4 MHz/5 V with all 33 I/O pins driving loads; place a 0.1 µF ceramic decoupling capacitor within 5 mm of VDD and a 10 µF bulk capacitor at the regulator output to suppress switching transients during I/O toggling. The brown-out reset threshold is approximately 4.0 V, so for 3.3 V-only operation verify the BOR is disabled in configuration bits. For battery-powered designs, run the LC variant at 3.3 V and put the MCU in SLEEP mode between ADC samples to reduce current to single-digit microamps.
The 44-pin PLCC J-lead package requires a JEDEC-standard 44-pin PLCC socket for socketed designs or reflow soldering for SMT integration. Route the 4 MHz crystal traces (OSC1/OSC2) within 5 mm of the MCU, guard them with a grounded trace, and keep them short to minimize stray capacitance. The MCLR reset pin should have a 10 kΩ pull-up to VDD and a 100 nF capacitor to ground; avoid long MCLR traces which couple noise into the internal reset generator. PORTA pins used as analog inputs should be isolated from digital switching lines by a ground guard ring to reduce ADC channel crosstalk.
OTP memory cannot be electrically erased, so design verification must be done on the windowed PIC16LC77-04/L UV-erasable variant or in-circuit via ICD on a PIC16F877A-I/L adapter board before committing code to OTP. Do not exceed 4 MHz oscillator frequency on the -04 speed grade; higher crystals violate timing margins and may produce unreliable ADC readings. The configuration bits (especially oscillator selection, watchdog enable, and brown-out reset threshold) must be set explicitly - leaving them at default erase state can leave the watchdog active and hang the application without an external reset.
When driving long cables or relays from the I/O pins, add series resistors (100 Ω to 1 kΩ) to limit surge currents and reduce EMI ringing. The USART pins RC6/RC7 share functionality with the PORTC general I/O, so disable the USART in the RCSTA register if not in use to free the pins for GPIO. The ADC acquisition time must be at least 19.5 µs at 4 MHz; verify the A/D clock divider (ADCON0) is configured to meet the minimum TAD spec given in the electrical characteristics table.
コンプライアンス情報
RoHS/REACH compliance depends on date code and specific manufacturing lot. Older production runs may use SnPb lead finish while newer lots are Pb-free - verify with the certificate of compliance (CoC) for the specific date code. Not AEC-Q100 qualified; not recommended for new automotive designs.
