PIC16LC74BT-04I/L - 8-bit 4MHz MCU 7KB OTP 44-PLCC | Microchip
部品番号: PIC16LC74BT-04I/L ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $10.47 | $10.47 |
| 10 | $9.92 | $99.20 |
| 100 | $9.42 | $942.00 |
| 500 | $8.8 | $4,400.00 |
| 1,000 | $8.2 | $8,200.00 |
PIC16LC74BT-04I/L 概要
A microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data memory, and peripheral interfaces on one die. Within the broader taxonomy, the PIC16LC74B belongs to the Mid-Range PIC16 architecture (14-bit instruction word, RISC core) which sits between the Base-Line PIC10/PIC12/PIC16C5x family and the Enhanced Mid-Range PIC16F1xxx family. The PIC16LC74B is a power-management-conscious derivative using a low-voltage CMOS process, and ultimately falls under the 8-bit MCU category within embedded microcontrollers and semiconductor ICs.
Key features of the PIC16LC74BT-04I/L include a Harvard-architecture 8-bit RISC core with a 14-bit instruction set, built-in peripherals such as Brown-out Detect/Reset, Power-on Reset (POR), Pulse-Width Modulation (PWM) outputs, and a Watchdog Timer (WDT). The device also integrates analog and digital resources, including an 8-bit ADC, multiple timers (5 x 8-bit plus 1 x 16-bit), and a 5 x 8-bit structure that maps I/O, timer, and interrupt resources. Connectivity is provided by one I2C/SPI interface and one UART/USART channel, supporting common industrial networking protocols.
The device utilizes Microchip's standard OTP EPROM-based program memory, which is mask-programmed during manufacturing and cannot be erased electrically. This makes the PIC16LC74BT-04I/L a production-targeted part for designs where the firmware is stable, cost-sensitive, and high-volume. The "T" suffix indicates a tape-and-reel packaging option, while "/L" specifies the leadless 44-PLCC surface-mount package with J-bend terminations.
Typical applications include industrial control panels, appliance controllers, automotive sub-system modules, sensor signal conditioning, and low-power embedded products where the 2.5V minimum supply enables direct battery or 3.3V-rail operation. The wide temperature range makes the part suitable for HVAC, factory automation, and outdoor instrumentation.
A key design consideration is the trade-off between OTP memory (no in-field updates) and Flash-based siblings such as PIC16F74. Engineers targeting a stable, low-cost, high-volume product should select the OTP "C" variant, but should prototype using the PIC16F74 Flash version to allow firmware iteration. Designers should also note the 33 I/O pin budget against the 44-pin PLCC assignments and ensure proper decoupling on VDD/AVDD/VDDCORE pins.
This page synthesizes distributor pricing, drop-in alternative options from the same PIC16C family, and practical design notes not consolidated in any single manufacturer document.
ドロップイン代替品: PIC16LC74BT-04I/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: PIC16LC74BT-04I/L （同一形状・フットプリント） — 相違点: Mounting Type, Operating Temperature Range, Program Memory Size, Program Memory Type, Instruction Cycle Time.
クイック比較ツール — 並列比較する代替部品を選択:
PIC16C74B-04I/L
✅ ドロップイン✓ 在庫あり
$2.61 / 個
データシートを見る →PIC16C74B-04/L
✅ ドロップイン✓ 在庫あり
$3.32 / 個
データシートを見る →PIC16LC74B-04I/L
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$6.95 / 個
データシートを見る →PIC16LC74B-04I/P
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$2.12 / 個
データシートを見る →PIC16C74A-04I/L
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
PIC16LC74AT-04I/L
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
PIC16LC74BT-04I/L 最大定格＆電気的特性
| Core | 8-bit PIC RISC (Mid-Range PIC16, 14-bit instruction word) |
| Program Memory Type | OTP (One-Time-Programmable EPROM) |
| Program Memory Size | 7 KB (4K x 14) |
| RAM | 192 bytes |
| 最大クロック周波数 | 4 MHz |
| Operating Voltage Range | 2.5 V to 5.5 V |
| 動作温度範囲 | -40 C to +85 C (Industrial) |
| Number of I/O Pins | 33 |
| Package Type | 44-pin PLCC (16.59 x 16.59 mm, J-bend) |
| ADC | 8-bit, 8 channels |
| Timers | 5 x 8-bit + 1 x 16-bit |
| Connectivity | I2C, SPI, UART/USART |
| Integrated Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
| 実装タイプ | Surface Mount |
PIC16LC74BT-04I/L ピン構成
| ピン 1 | MCLR/VPP — Master Clear (reset) input / programming voltage |
| 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 — PORTA bit 2 / analog input channel 2 |
| ピン 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog channel 3 / ADC reference positive |
| ピン 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| ピン 7 | RA5/AN4/SS — PORTA bit 5 / analog channel 4 / SPI slave select |
| ピン 8 | RE0/RD/AN5 — PORTE bit 0 / parallel port read / analog channel 5 |
| ピン 9 | RE1/WR/AN6 — PORTE bit 1 / parallel port write / analog channel 6 |
| ピン 10 | RE2/CS/AN7 — PORTE bit 2 / parallel port chip select / analog channel 7 |
| ピン 11 | VDD — Positive digital supply (2.5V to 5.5V) |
| ピン 12 | VSS — Digital ground |
| ピン 13 | OSC1/CLKIN — Oscillator input / external clock input |
| ピン 14 | OSC2/CLKOUT — Oscillator output / clock output |
| ピン 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| ピン 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / Capture-Compare-PWM 2 |
| ピン 17 | RC2/CCP1 — PORTC bit 2 / Capture-Compare-PWM 1 |
| ピン 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| ピン 19 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| ピン 20 | RC5/SDO — PORTC bit 5 / SPI data out |
| ピン 21 | RC6/TX/CK — PORTC bit 6 / UART transmit / I2C clock (slave mode) |
| ピン 22 | RC7/RX/DT — PORTC bit 7 / UART receive / I2C data (slave mode) |
| ピン 23 | VSS — Digital ground |
| ピン 24 | AVDD — Analog positive supply |
| ピン 25 | AVSS — Analog ground |
| ピン 26 | VREF- — ADC negative reference |
| ピン 27 | RB0/INT — PORTB bit 0 / external interrupt |
| ピン 28 | RB1 — PORTB bit 1 |
| ピン 29 | RB2 — PORTB bit 2 |
| ピン 30 | RB3/PGM — PORTB bit 3 / low-voltage programming |
| ピン 31 | RB4 — PORTB bit 4 |
| ピン 32 | RB5 — PORTB bit 5 |
| ピン 33 | RB6/PGC — PORTB bit 6 / ICSP clock |
| ピン 34 | RB7/PGD — PORTB bit 7 / ICSP data |
| ピン 35 | RD0/PSP0 — PORTD bit 0 / parallel slave port bit 0 |
| ピン 36 | RD1/PSP1 — PORTD bit 1 / parallel slave port bit 1 |
| ピン 37 | RD2/PSP2 — PORTD bit 2 / parallel slave port bit 2 |
| ピン 38 | RD3/PSP3 — PORTD bit 3 / parallel slave port bit 3 |
| ピン 39 | RD4/PSP4 — PORTD bit 4 / parallel slave port bit 4 |
| ピン 40 | RD5/PSP5 — PORTD bit 5 / parallel slave port bit 5 |
| ピン 41 | RD6/PSP6 — PORTD bit 6 / parallel slave port bit 6 |
| ピン 42 | RD7/PSP7 — PORTD bit 7 / parallel slave port bit 7 |
| ピン 43 | AVDD — Analog positive supply (redundant pin) |
| ピン 44 | AVSS — Analog ground (redundant pin) |
主な用途
PIC16LC74BT-04I/L の用途: 7 件s: Industrial Control Panels, Home Appliance Controllers, Automotive Body Electronics Sub-Modules, Sensor Signal Conditioning & Data Acquisition Front-Ends, HVAC and Building Automation, Low-Power Embedded Battery Products, Legacy Production Sustaining Designs.
Industrial Control Panels
The PIC16LC74BT-04I/L suits industrial HMI and control panels where deterministic 8-bit response and an industrial -40C to +85C grade are required. The 4 MHz/1 MIPS core, 33 I/O lines, and PWM peripherals handle relay drivers, indicator LEDs, and panel-switch matrix scanning, while Brown-out Detect/Reset and WDT provide robust field recovery. Designers typically pair the MCU with opto-isolated inputs and the 8-bit ADC for analog sensor conditioning inside 24V panels.
おすすめ
Home Appliance Controllers
In white-goods controllers such as washing machines, dishwashers, and microwave ovens, the PIC16LC74BT-04I/L's 33 I/O and PWM outputs directly drive triac/relay actuators, motor control signals, and seven-segment or LCD user-interface displays. The 192-byte RAM and 7KB OTP accommodate fixed-function appliance firmware, and the 2.5V to 5.5V supply allows direct 5V or 3.3V regulator operation. The OTP memory locks the appliance firmware against in-field tampering once production is locked.
おすすめ
Automotive Body Electronics Sub-Modules
The PIC16LC74BT-04I/L operates in automotive body-electronics sub-modules such as seat controllers, mirror adjusters, and climate-control heads, where its industrial temperature grade and PWM/USART peripherals fit interior 12V-bus subsystems. Its 8-channel 8-bit ADC reads sensor inputs (temperature, position, current) while PWM signals drive small DC-motor H-bridges. Note that for safety-critical automotive domains an AEC-Q100-qualified part is required; the PIC16LC74B family is generally non-automotive-graded.
おすすめ
Sensor Signal Conditioning & Data Acquisition Front-Ends
The PIC16LC74BT-04I/L acts as a low-cost data-acquisition front end for industrial sensors. Its 8-channel 8-bit ADC samples strain gauges, thermistors, or 4-20 mA loop sensors, while the I2C/SPI peripheral connects to external EEPROM, RTC, or DAC companions. With 192 bytes of RAM and serial comms, the part can buffer small packets before forwarding them to a host PLC or SCADA concentrator across UART. The 2.5V minimum supply enables battery-powered remote sensor nodes.
おすすめ
HVAC and Building Automation
The PIC16LC74BT-04I/L fits HVAC thermostats, fan-coil controllers, and building-automation nodes because it offers reliable -40C to +85C operation, 5 x 8-bit plus 1 x 16-bit timers for scheduling PWM outputs, and a Watchdog Timer for unattended operation. The 4 MHz core, brown-out reset, and POR combine for resilient start-up after power-cycling in equipment rooms. Multiple PWM channels can drive TRIAC/SSR heating and 3-speed fan stages from the same MCU.
おすすめ
Low-Power Embedded Battery Products
The "LC" low-voltage CMOS core enables the PIC16LC74BT-04I/L to run directly from a 3.3V rail or single-cell lithium-ion post-regulator, with operating voltage down to 2.5V. This makes it attractive for battery-powered instrumentation, wireless sensor nodes (paired with a discrete RF companion), and portable handheld tools where the 4 MHz instruction budget meets modest compute needs. The 192-byte RAM and 7KB OTP support typical wireless-protocol stack control loops.
おすすめ
Legacy Production Sustaining Designs
Because the PIC16LC74BT-04I/L is obsolete and uses OTP memory, the most common ongoing application is sustaining legacy production lines where firmware is locked and field-installed units need identical replacement MCUs. Industrial OEM customers with multi-decade service contracts (energy metering, elevator controllers, and railroad signaling auxiliaries) keep the part in scope specifically because OTP prevents accidental firmware drift on shipped units.
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: PIC16LC74BT-04I/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 | PIC16C74B-04I/L | PIC16C74B-04/L | PIC16LC74B-04I/L | PIC16LC74B-04I/P | PIC16C74A-04I/L | PIC16LC74AT-04I/L |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-PLCC | 44-PLCC (same) | 44-PLCC (same) | 44-PLCC (same) | 44-PLCC (same) | 44-PLCC (same) | 44-PLCC (same) |
| Core | 8-bit PIC16 RISC (Mid-Range) | 8-bit PIC16 RISC (same) | 8-bit PIC16 RISC (same) | 8-bit PIC16 RISC (same) | 8-bit PIC16 RISC (same) | 8-bit PIC16 RISC (same) | 8-bit PIC16 RISC (same) |
| Max Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Program Memory | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP |
| RAM | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 192 bytes |
| Operating Voltage | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V |
| Temperature Grade | Industrial -40C to +85C | Industrial -40C to +85C | Commercial 0C to +70C | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C |
| Packaging Suffix | Tape and Reel ("T") | Tube (no T suffix) | Tube (no T suffix) | Tube (no T suffix) | Tube (no T suffix) | Tube (no T suffix) | Tape and Reel (T suffix) |
| Lifecycle Status | Obsolete | Obsolete (per Microchip) | Obsolete (per Microchip) | Obsolete (per Microchip) | Obsolete (per Microchip) | Obsolete (per Microchip) | Obsolete (per Microchip) |
主な差別化要因
- Industrial OTP silicon with tape-and-reel packaging （vs PIC16C74B-04/L)
- Low-voltage CMOS "LC" core for 2.5V operation （vs PIC16C74B-04/L)
- Same 44-PLCC pinout as the Flash-based PIC16F74B successor （vs PIC16C74B-04I/L)
設計ノート
Do NOT select the PIC16LC74BT-04I/L for new designs as of 2026-09-22. The part is in obsolete lifecycle status and uses One-Time-Programmable memory, so firmware cannot be updated in the field. Use the Flash-based PIC16F74B-I/L on the same 44-PLCC footprint for any new development. Reserving the OTP "C" variant solely for legacy sustaining designs is the recommended design rule.
Decouple VDD/AVDD with 0.1 uF and 10 uF capacitors placed within 5 mm of the supply pins, per the Microchip PIC16C74B datasheet layout guidance. Tie the AVDD/AVSS pins on a 44-PLCC footprint to their corresponding supplies even if the ADC is unused, and route analog and digital grounds to a single point to prevent digital switching noise from coupling into ADC channels. Brown-out Detect must be enabled in configuration fuses for industrial deployments to avoid spurious reset behavior.
Place the 4 MHz crystal or resonator within 10 mm of the OSC1/OSC2 pins and keep the oscillator traces over a continuous ground plane. Avoid routing high-speed switching signals (PWM outputs, parallel-slave-port lines) across the MCLR/VPP pin or near the ICSP PGC/PGD pins, as capacitive coupling can corrupt in-circuit programming. For the 44-PLCC socketed application, ensure the PLCC socket retention clip grounds properly to prevent ESD-induced latch-up on the I/O pins.
コンプライアンス情報
This part is OTP CMOS silicon in a 44-PLCC J-bend package; RoHS/REACH/lead-free/halogen-free/conflict-mineral data was not provided in the verified web data and is therefore marked unknown. AEC-Q100 status is not applicable (not qualified per Microchip nomenclature; automotive applications require explicit AEC-Q100-grade parts).
