PIC16LC72AT-04/SO - 8-Bit 4MHz MCU 3.5KB OTP 28-SOIC | Microchip
部品番号: PIC16LC72AT-04/SO ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.66 | $16.60 |
| 100 | $1.48 | $148.00 |
| 500 | $1.32 | $660.00 |
| 1,000 | $1.18 | $1,180.00 |
| 3,000 | $1.05 | $3,150.00 |
PIC16LC72AT-04/SO 概要
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, working RAM, and peripheral set. The PIC16C family uses a Harvard RISC architecture with separate program and data buses, allowing the CPU to fetch an opcode while reading data memory in the same cycle. Within Microchip's taxonomy, the PIC16LC72A sits in the mid-range PIC16 family -> 8-bit PIC microcontroller -> MCU -> semiconductor hierarchy. The '04' speed suffix specifies 4 MHz maximum oscillator frequency, and 'SO' is the package designator for 28-pin 300-mil SOIC.
Key features include the 8-bit accumulator-based ALU, 22 I/O pins with high-current sink/source capability, three hardware timers (Timer0, Timer1, Timer2), a 10-bit successive-approximation ADC with up to 5 channels, a 5-bit digital-to-analog converter (CCP/PWM module), a synchronous/asynchronous serial port (SSP/SPI/I2C), and a USART with on-chip baud-rate generator. Brown-out Reset (BOR), Power-on Reset (POR), and a watchdog timer with its own on-chip RC oscillator are also integrated. The instruction set is 35 single-word instructions, most executing in a single instruction cycle.
The architecture uses a modified Harvard layout with a 14-bit program word and 8-bit data path. The enhanced PIC16C72A silicon revision adds hardware multiply, larger stack depth (8 levels), and improved ADC linearity compared with the original PIC16C72. Internal RC oscillator options and selectable oscillator modes support crystal, resonator, and external clock sources across the 0-4 MHz range. The CMOS process yields typical active current of 2 mA at 4 MHz / 5 V and standby currents under 1 uA at 3.3 V.
Typical applications include low-power embedded control for white goods and small appliances, HVAC fan controllers, security-system sensor nodes, remote-keyless-entry transmitters, low-end motor-control loops (small DC and BLDC fans), battery chargers, and consumer-electronics human-interface panels where deterministic 8-bit control at low cost is preferred over 32-bit performance. The 28-pin SOIC footprint also suits retrofitting older 28-pin PIC16C72 boards with an enhanced-A revision drop-in.
A key design consideration is OTP memory: code cannot be erased after programming, so for in-field firmware updates choose the PIC16F72 (Flash) or PIC16CR72 (ROM) variants instead. Ensure your programmer supports 3.3 V (LC) programming levels and use AC162061-ICD or MPLAB ICD 2/3 in-circuit debug for development with the -ICE/-ICD suffix parts.
This page consolidates distributor pricing, drop-in cross-reference alternatives, and design notes not found in the manufacturer datasheet, giving engineers a single reference for sourcing and replacing the PIC16LC72AT-04/SO.
ドロップイン代替品: PIC16LC72AT-04/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: PIC16LC72AT-04/SO （同一形状・フットプリント） — 相違点: Package, Timers, ADC, Operating Temperature, Program Memory Type.
クイック比較ツール — 並列比較する代替部品を選択:
PIC16C72AT-04/SO
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$3.5 / 個
データシートを見る →PIC16LC72A-04/SO
✅ ドロップイン📋 参考代替品（カタログ未掲載）
PIC16LC72AT-04I/SO
✅ ドロップイン✓ 在庫あり
$2.65 / 個
データシートを見る →PIC16LC72-04/SO
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$1.95 / 個
データシートを見る →PIC16F72-I/SO
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$1.95 / 個
データシートを見る →PIC16LC72AT-04/SO 最大定格＆電気的特性
| Core Processor | PIC |
| Core Size | 8-bit |
| Core Architecture | RISC (Harvard, modified) |
| Series | PIC 16C |
| Program Memory Type | OTP (One-Time-Programmable) |
| Program Memory Size | 3.5 KB (2K x 14) |
| Data RAM Size | 128 bytes |
| 最大クロック周波数 | 4 MHz |
| Instruction Cycle Time | 1 MIPS at 4 MHz |
| Supply Voltage Range | 2.5 V to 6.0 V (typical 3.3 V / 5 V) |
| I/O Pins | 22 |
| ADC | 10-bit, up to 5 channels |
| Timers | 3 x 8/16-bit (Timer0, Timer1, Timer2) |
| Serial Interfaces | SSP/SPI/I2C, USART with BRG |
| PWM / CCP Modules | 1 CCP, 10-bit PWM |
| Watchdog Timer | Yes (with on-chip RC oscillator) |
| Brown-out Reset / POR | Yes / Yes |
| 動作温度 | -40C to +85C (industrial) |
| パッケージ | 28-pin SOIC (SO), wide-body 300-mil |
| 実装タイプ | Surface Mount |
| Silicon Revision | A (enhanced vs. original PIC16C72) |
PIC16LC72AT-04/SO ピン構成
| ピン 1 | MCLR/Vpp — Master Clear (Reset) input / programming voltage |
| ピン 2 | RA0/AN0 — Digital I/O / analog input channel 0 |
| ピン 3 | RA1/AN1 — Digital I/O / analog input channel 1 |
| ピン 4 | RA2/AN2 — Digital I/O / analog input channel 2 |
| ピン 5 | RA3/AN3/Vref — Digital I/O / analog input 3 / ADC Vref |
| ピン 6 | RA4/T0CKI — Digital I/O / Timer0 clock input |
| ピン 7 | RA5/AN4/SS — Digital I/O / analog input 4 / SPI slave select |
| ピン 8 | Vss — Ground reference |
| ピン 9 | OSC1/CLKIN — Oscillator crystal input / external clock in |
| ピン 10 | OSC2/CLKOUT — Oscillator crystal output / clock out |
| ピン 11 | RC0/T1OSO/T1CKI — Digital I/O / Timer1 oscillator out / Timer1 clock |
| ピン 12 | RC1/T1OSI/CCP2 — Digital I/O / Timer1 oscillator in / CCP2 |
| ピン 13 | RC2/CCP1 — Digital I/O / CCP1 PWM output |
| ピン 14 | RC3/SCK/SCL — Digital I/O / SPI clock / I2C clock |
| ピン 15 | RC4/SDI/SDA — Digital I/O / SPI data in / I2C data |
| ピン 16 | RC5/SDO — Digital I/O / SPI data out |
| ピン 17 | RC6/TX/CK — Digital I/O / USART TX / USART clock |
| ピン 18 | RC7/RX/DT — Digital I/O / USART RX / USART data |
| ピン 19 | Vss — Ground reference |
| ピン 20 | Vdd — Positive supply voltage |
| ピン 21 | RB0/INT — Digital I/O / external interrupt |
| ピン 22 | RB1 — Digital I/O |
| ピン 23 | RB2 — Digital I/O |
| ピン 24 | RB3/PGM — Digital I/O / LVP programming entry |
| ピン 25 | RB4 — Digital I/O |
| ピン 26 | RB5 — Digital I/O |
| ピン 27 | RB6/PGC — Digital I/O / ICD clock |
| ピン 28 | RB7/PGD — Digital I/O / ICD data |
主な用途
PIC16LC72AT-04/SO の用途: 6 件s: Low-Power White Goods Control, HVAC Fan Motor Controller, Security System Sensor Node, Remote Keyless Entry Transmitter, Consumer Audio Volume / Tone Control, Battery Charger Controller.
Low-Power White Goods Control
The PIC16LC72AT-04/SO suits white-goods control boards (washing-machine user interfaces, dishwasher timers, microwave keypads) where its 3.5 KB OTP, 128 B RAM, and 22 I/O pins handle button-scanning, LED driving, and relay logic. The LC variant's 2.5-6.0 V supply supports 3.3 V appliance rails, drawing under 2 mA active at 4 MHz. Its 10-bit ADC reads water-level thermistors, and the CCP/PWM modulates buzzer tones. Compared with 32-bit alternatives, the 8-bit core delivers deterministic interrupt latency critical for safety timers.
おすすめ
HVAC Fan Motor Controller
In HVAC indoor-unit fan controllers, the PIC16LC72AT-04/SO drives a triac-fired BLDC or shaded-PEL motor via its 10-bit PWM module. The 'AT-04' speed grade provides the 4 MHz / 1 MIPS throughput needed for closed-loop RPM sensing via the input-capture pin. The 10-bit ADC samples tachometer feedback and thermistor inputs, while the USART links to a wall thermostat. The 28-SOIC footprint is well-proven in production HVAC boards, and the enhanced 'A' silicon revision's hardware multiply accelerates FIR-filter RPM calculations.
おすすめ
Security System Sensor Node
In PIR motion detectors, door/window contact sensors, and glass-break detectors, the PIC16LC72AT-04/SO operates from a 3 V lithium battery, exploiting the LC variant's sub-1 uA sleep current and <2 mA active draw. The 22 I/O pins read multiple reed switches, drive an RF transmitter (via USART/SPI), and blink a status LED via Timer2 PWM. The 3.5 KB OTP holds pet-immune algorithms and pulse-counting logic. Brown-out Reset prevents corruption when batteries age below 2.5 V. The 28-SOIC footprint enables compact PCBs behind wall-mount sensor housings.
おすすめ
Remote Keyless Entry Transmitter
For automotive RKE fobs the PIC16LC72AT-04/SO provides the 8-bit control core that reads button-matrix inputs, encrypts rolling codes, and drives a 315/433 MHz SAW-resonator-based transmitter via OOK/FSK modulation. The 4 MHz / 1 MIPS timing is sufficient for 100 us button-debounce loops and Manchester-encoded data streams. The LC process yields years of standby on a CR2032 cell, and the 28-SOIC enables thin fob PCB layouts. Industrial -40 to +85C variants (PIC16LC72AT-04I/SO) handle automotive thermal-cycling requirements.
おすすめ
Consumer Audio Volume / Tone Control
In low-cost audio equipment (boomboxes, mini Hi-Fi amplifiers, PA mixers) the PIC16LC72AT-04/SO drives rotary encoder inputs and LED VU-meter displays while communicating with digital potentiometers or DSP volume chips over I2C. The 10-bit PWM generates beep tones and click-suppression ramps; the 10-bit ADC monitors supply voltage for brown-out muting. The 3.3 V LC variant runs from the audio rail directly. 28-SOIC packaging suits through-hole-friendly retrofit boards in legacy audio products.
おすすめ
Battery Charger Controller
NiCd/NiMH/Li-ion charger designs use the PIC16LC72AT-04/SO for delta-V peak detection, temperature monitoring, and PWM control of the charging current via a MOSFET driver. The 10-bit ADC samples battery voltage and thermistor inputs at 4 MHz / 1 MIPS throughput, while the CCP/PWM module regulates charge current at up to 10-bit resolution. The LC variant's 2.5-6.0 V supply matches single-cell Li-ion rails, and the BOR prevents over-discharge damage. The 28-SOIC footprint accommodates thermal copper pours for the power section.
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: PIC16LC72AT-04/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 | PIC16C72AT-04/SO | PIC16LC72A-04/SO | PIC16LC72AT-04I/SO | PIC16LC72-04/SO | PIC16F72-I/SO |
|---|---|---|---|---|---|---|
| Package | 28-SOIC | 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 |
| Program Memory Type | OTP 3.5 KB | OTP 3.5 KB | OTP 3.5 KB | OTP 3.5 KB | OTP 3.5 KB | Flash 3.5 KB (reprogrammable) |
| Silicon Revision | Enhanced A (hardware multiply) | Enhanced A | Enhanced A | Enhanced A | Original (no HW multiply) | Flash-based A-equivalent |
| Supply Voltage | 2.5 V to 6.0 V (LC) | 4.5 V to 5.5 V (standard C) | 2.5 V to 6.0 V (LC) | 2.5 V to 6.0 V (LC) | 2.5 V to 6.0 V (LC) | 2.0 V to 5.5 V (F) |
| Max Clock Frequency | 4 MHz (1 MIPS) | 4 MHz (1 MIPS) | 4 MHz (1 MIPS) | 4 MHz (1 MIPS) | 4 MHz (1 MIPS) | 20 MHz (5 MIPS) |
| Operating Temperature | 0C to +70C (commercial) | 0C to +70C (commercial) | 0C to +70C (commercial) | -40C to +85C (industrial) | 0C to +70C (commercial) | -40C to +85C (industrial) |
| Tape & Reel Suffix | Yes (T in MPN) | Yes | No (tray/tube) | Yes | No (tray/tube) | No (tray/tube) |
| Param Match Percentage | 100% | 90% (supply voltage differs) | 100% | 95% (temp range only) | 80% (no HW multiply) | 80% (Flash vs OTP, faster clock) |
主な差別化要因
- Enhanced 'A' silicon revision with hardware multiply （vs PIC16LC72-04/SO)
- Low-voltage LC process for 3.3 V battery operation （vs PIC16C72AT-04/SO)
- Industrial temperature grade option in same package （vs PIC16LC72AT-04I/SO)
設計ノート
The PIC16LC72AT-04/SO requires a clean 2.5-6.0 V supply; place a 100 nF decoupling capacitor within 5 mm of Vdd (pin 20) and a bulk 10 uF tantalum or ceramic on the same rail. For battery applications, add a 100 kohm pull-down on MCLR/Vpp to avoid floating-reset lockups. Brown-out Reset is enabled by config bit BODEN; configure BOR voltage to 2.5 V or 4.0 V via the BORV1:BORV0 bits in the configuration word.
Layout: keep the 28-SOIC footprint on a 1.27 mm pitch (300-mil SOIC). Place the crystal/oscillator within 5 mm of OSC1 (pin 9) and OSC2 (pin 10) to minimize parasitic capacitance. Route analog signals (RA0-RA5) away from digital switching traces, and add a ground guard ring around AVss if used. The exposed-pad (none on SOIC) is not present, but thermal relief is generally unnecessary given the device's 2 mA typical active current.
OTP memory warning: code programmed into the PIC16LC72AT-04/SO cannot be erased. Use MPLAB X with the PICkit 3/4 or ICD 3/4 in DEBUG mode on the PIC16C72A-ICD equivalent for development, then program the OTP production units only after firmware is final. In-circuit Serial Programming (ICSP) requires Vpp = 13 V on MCLR/Vpp - ensure your programmer supports the PIC16C72A device ID (0x162 or 0x172 family).
The PIC16LC72AT-04/SO has limited ADC input impedance (~10 kohm). For high-impedance sensor sources, add a 100 nF capacitor on the analog input and a unity-gain buffer (MCP6022 op-amp) to drive the ADC channel. Configure the ADC acquisition time via ADCON1 register to allow adequate sample-hold settling - 20 us acquisition time is recommended for 10 kohm source impedance. Use the internal Vref for ratio-metric measurements to avoid external reference noise coupling.
コンプライアンス情報
RoHS status not confirmed in verified web data - marked [DATA_NEEDED]. Microchip PIC products are generally RoHS compliant via Pb-free matte-tin lead finish, but verify via the manufacturer's Certificate of Compliance before procurement. AEC-Q100 not qualified - PIC automotive parts carry a -I or -E automotive temperature grade suffix but are not formally AEC-Q100 unless explicitly noted.
