PIC16C74B-04E/L - 8-bit OTP MCU 4MHz 7KB 44-PLCC | Microchip
Артикул: PIC16C74B-04E/L ✗ Снят с производства| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $14.5 | $14,50 |
| 10 | $13.05 | $130,50 |
| 100 | $11.6 | $1.160,00 |
| 500 | $10.45 | $5.225,00 |
| 1.000 | $9.3 | $9.300,00 |
PIC16C74B-04E/L Обзор
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, and peripherals on one die. The PIC16C family sits within Microchip's mid-range MCU hierarchy: PIC10/12/16 baseline -> PIC16C mid-range -> PIC18/dsPIC enhanced -> 32-bit Cortex-M class. Mid-range MCUs target embedded control tasks that need deterministic timing, simple peripheral sets, and code density better than 8-bit baselines without the cost of a 32-bit core.
Key features include 33 digital I/O lines, 8 channels of 8-bit Analog-to-Digital conversion, two 8-bit timers plus one 16-bit timer, two Capture/Compare/PWM (CCP) peripherals, a synchronous serial port configurable as SPI or I2C, and a Universal Synchronous/Asynchronous Receiver-Transmitter (USART). High sink/source current of 25 mA per pin simplifies direct drive of LEDs and small relays. Wide operating voltage spans 2.5 V to 6.0 V with typical standby current of 1 uA at 3 V / 32 kHz.
Typical applications include industrial control panels, automotive body electronics, sensor signal conditioning, and embedded instrumentation where the extended temperature range and OTP-based code security are required. The PIC16C74B is also a drop-in successor to PIC16C74A variants in the same 44-pin PLCC footprint, offering a clear migration path within Microchip's mid-range portfolio.
Аналоги без доработки для PIC16C74B-04E/L — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с PIC16C74B-04E/L (тот же форм-фактор и посадочное место) — отличается по Package, Timers, Core Architecture, Operating Temperature, Mounting Type.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
PIC16C74B-04/L
✅ Прямая замена✓ В наличии
$3.32 / шт.
Открыть даташит →PIC16C74B-04I/L
✅ Прямая замена✓ В наличии
$2.61 / шт.
Открыть даташит →PIC16C74B-20/L
✅ Прямая замена✓ В наличии
$8.2 / шт.
Открыть даташит →PIC16F74-I/L
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
PIC16C74A-04/L
✅ Прямая замена✓ В наличии
$6.1 / шт.
Открыть даташит →PIC16C74B-04E/L Максимальные параметры и электрические характеристики
| Core Architecture | PIC16CXX mid-range 8-bit RISC |
| Program Memory | 7 KB (4K x 14) OTP |
| RAM Size | 192 x 8 bytes |
| Максимальная тактовая частота | 4 MHz |
| Instruction Execution Time | 200 ns at 20 MHz |
| Instruction Set Size | 35 single-word instructions |
| Number of I/O Pins | 33 |
| ADC | 8 channels, 8-bit resolution |
| Timers | 2 x 8-bit + 1 x 16-bit |
| Capture/Compare/PWM | 2 CCP modules |
| Serial Interfaces | SPI, I2C, USART |
| Operating Voltage Range | 2.5 V to 6.0 V |
| DC Source/Sink Current per I/O | 25 mA / 25 mA |
| Typical Standby Current | 1 uA at 3 V, 32 kHz |
| Рабочая температура | -40C to +125C (Extended, grade E) |
| Корпус | 44-pin PLCC (J-Lead, L) |
| Package Dimensions | 16.59 mm x 16.59 mm |
| Тип монтажа | Surface Mount |
| Lead-Free / RoHS | Lead-containing (non-RoHS by default for OTP C parts) |
Конфигурация выводов PIC16C74B-04E/L
| Контакт 1 | MCLR/VPP — Master Clear (Reset) input / Programming voltage |
| Контакт 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| Контакт 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| Контакт 4 | RA2/AN2 — PORTA bit 2 / Analog input 2 |
| Контакт 5 | RA3/AN3/VREF — PORTA bit 3 / Analog input 3 / VREF+ |
| Контакт 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Контакт 7 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SPI Slave Select |
| Контакт 8 | RE0/RD — PORTE bit 0 / Read control for parallel slave port |
| Контакт 9 | RE1/WR — PORTE bit 1 / Write control for parallel slave port |
| Контакт 10 | RE2/CS — PORTE bit 2 / Chip select for parallel slave port |
| Контакт 11 | VDD — Positive supply (5 V nominal) |
| Контакт 12 | VSS — Ground reference |
| Контакт 13 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| Контакт 14 | OSC2/CLKOUT — Oscillator crystal output / clock out (Fosc/4) |
| Контакт 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator out / clock in |
| Контакт 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator in / CCP2 |
| Контакт 17 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM 1 |
| Контакт 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Контакт 19 | RD0/PSP0 — PORTD bit 0 / Parallel slave port data bit 0 |
| Контакт 20 | RD1/PSP1 — PORTD bit 1 / Parallel slave port data bit 1 |
| Контакт 21 | RD2/PSP2 — PORTD bit 2 / Parallel slave port data bit 2 |
| Контакт 22 | RD3/PSP3 — PORTD bit 3 / Parallel slave port data bit 3 |
| Контакт 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Контакт 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| Контакт 25 | RC6/TX/CK — PORTC bit 6 / USART TX / clock (sync mode) |
| Контакт 26 | RC7/RX/DT — PORTC bit 7 / USART RX / data (sync mode) |
| Контакт 27 | RD4/PSP4 — PORTD bit 4 / Parallel slave port data bit 4 |
| Контакт 28 | RD5/PSP5 — PORTD bit 5 / Parallel slave port data bit 5 |
| Контакт 29 | RD6/PSP6 — PORTD bit 6 / Parallel slave port data bit 6 |
| Контакт 30 | RD7/PSP7 — PORTD bit 7 / Parallel slave port data bit 7 |
| Контакт 31 | VSS — Ground reference |
| Контакт 32 | VDD — Positive supply (5 V nominal) |
| Контакт 33 | RB0/INT — PORTB bit 0 / External interrupt input |
| Контакт 34 | RB1 — PORTB bit 1 |
| Контакт 35 | RB2 — PORTB bit 2 |
| Контакт 36 | RB3 — PORTB bit 3 |
| Контакт 37 | RB4 — PORTB bit 4 |
| Контакт 38 | RB5 — PORTB bit 5 |
| Контакт 39 | RB6/PGC — PORTB bit 6 / ICSP clock (programming/debug) |
| Контакт 40 | RB7/PGD — PORTB bit 7 / ICSP data (programming/debug) |
| Контакт 41 | NC — Not connected (per datasheet) |
| Контакт 42 | NC — Not connected (per datasheet) |
| Контакт 43 | NC — Not connected (per datasheet) |
| Контакт 44 | NC — Not connected (per datasheet) |
Типичное применение
PIC16C74B-04E/L подходит для 6 применениеs: Industrial Process Control, Automotive Body Electronics, Embedded Sensor Signal Conditioning, White Goods and Home Appliance Control, Test and Measurement Instrumentation, Security and Access Control Panels.
Industrial Process Control
The PIC16C74B-04E/L fits industrial process controllers thanks to its 8-channel 8-bit ADC for analog sensor inputs (4-20 mA, 0-10 V, thermocouple pre-amp outputs), 33 digital I/O for valve/relay drivers, and the 25 mA sink/source capability that eliminates external transistors. The extended -40C to +125C temperature grade handles unconditioned cabinet environments, while 192 bytes of RAM and 7 KB OTP cover typical PID control loops. Placed on a backplane with optoisolated I/O, it executes a 200 ns instruction cycle at 4 MHz fast enough for sub-millisecond loop times, and the USART links directly to an RS-485 transceiver for SCADA networks.
Рекомендуется
Automotive Body Electronics
The PIC16C74B-04E/L's extended -40C to +125C temperature grade and OTP code security make it a fit for automotive body modules such as climate controls, lighting timers, and seat controllers. The two CCP peripherals drive PWM outputs for LED dimming and motor speed, the USART interfaces with body control network gateways, and the 25 mA I/O drive small relays directly. Code is locked in OTP after verification, reducing the risk of field firmware tampering. Placed on a switch-mode supply input and connected via I2C to sensor clusters, it replaces larger discrete logic with deterministic mid-range PIC performance.
Рекомендуется
Embedded Sensor Signal Conditioning
Multi-channel sensor conditioning benefits from the PIC16C74B-04E/L's 8-channel 8-bit ADC scanning rate (around 15 ksps combined) and on-chip 16-bit Timer1 for precise sampling windows. The 7 KB OTP holds scaling, calibration and linearization tables for thermocouples, RTDs and strain gauges. The master SPI/I2C port reads digital sensors or drives an external DAC/ADC for higher-precision front ends. Mounted on a 4-layer sensor board with the MCU in 44-PLCC, designers gain an 8-bit deterministic engine that is reproducible and tamper-resistant for OEM instruments.
Рекомендуется
White Goods and Home Appliance Control
Washing machine, dishwasher and HVAC control boards use the PIC16C74B-04E/L to manage triac-driven loads, keypad inputs, and alphanumeric LCDs. The CCP PWM outputs dim indicators and drive variable-speed pumps, while the 33 I/O scan the keypad matrix without external muxes. OTP program memory locks the certified control algorithm, preventing field tampering with safety-critical parameters. Connected to a triac opto-coupler interface and protected by the wide 2.5-6.0 V supply range, the PIC16C74B-04E/L operates reliably from rectified mains-rail rails with minimal external regulation.
Рекомендуется
Test and Measurement Instrumentation
Bench instruments and portable dataloggers use the PIC16C74B-04E/L as a measurement co-processor: the 8-bit ADC captures multiplexed analog inputs while the USART streams data to a host PC or display. The 35-instruction mid-range core runs deterministic state machines with sub-microsecond latency, ideal for waveform-edge detection via the CCP capture inputs. OTP code security protects proprietary calibration constants stored in non-volatile memory. Paired with an external 16-bit ADC for high-precision channels, it forms a compact front end for hand-held multimeters.
Рекомендуется
Security and Access Control Panels
Alarm panels and access controllers use the PIC16C74B-04E/L for keypad scanning, sensor loop monitoring, and dialer output via the USART. The 33 I/O handle multiple zones directly, while the 16-bit Timer1 keeps wall-clock time with a 32.768 kHz crystal. OTP memory locks installer codes and event logs, resisting tamper attempts. Placed in a wall-mounted enclosure with battery backup, the PIC16C74B-04E/L extends battery life through its 1 uA typical standby current at 3 V / 32 kHz, meeting the multi-year standby requirement of UL-listed alarm panels.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для PIC16C74B-04E/L — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | PIC16C74B-04/L | PIC16C74B-04I/L | PIC16C74B-20/L | PIC16F74-I/L | PIC16C74A-04/L |
|---|---|---|---|---|---|---|
| Package | 44-PLCC (J-Lead, 16.59x16.59 mm) | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Program Memory | 7 KB (4K x 14) OTP | 7 KB OTP - same | 7 KB OTP - same | 7 KB OTP - same | 7 KB Flash | 7 KB OTP - same |
| Maximum Clock Speed | 4 MHz | 4 MHz | 4 MHz | 20 MHz (5x faster) | 20 MHz | 4 MHz |
| RAM Size | 192 x 8 bytes | 192 bytes - same | 192 bytes - same | 192 bytes - same | 192 bytes - same | 192 bytes - same |
| Temperature Grade | Extended (-40C to +125C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) |
| ADC | 8-channel 8-bit | 8-channel 8-bit - same | 8-channel 8-bit - same | 8-channel 8-bit - same | 8-channel 8-bit - same | 8-channel 8-bit - same |
| Serial Interfaces | USART + SPI/I2C | USART + SPI/I2C - same | USART + SPI/I2C - same | USART + SPI/I2C - same | USART + SPI/I2C - same | USART + SPI/I2C - same |
| Memory Type | OTP (one-time-program) | OTP - same | OTP - same | OTP - same | Flash (re-programmable) | OTP - same |
Ключевые отличия
- Extended temperature grade (-40C to +125C) (против PIC16C74B-04/L)
- OTP code security for certified/production code (против PIC16F74-I/L)
- 8-channel 8-bit ADC integrated with CCP/USART (против PIC16C73B-04/SP (28-pin variant))
Заметки по проектированию
Place a 0.1 uF ceramic decoupling capacitor within 5 mm of each VDD/VSS pin pair (pins 11/12 and 32/31 on the 44-PLCC). For wide-temperature boards add a 10 uF tantalum bulk cap on the main 5 V rail. Estimated: total supply current at 4 MHz / 5 V is 5-15 mA across the digital + ADC + peripherals, well within the recommended VDD source capability.
Keep the analog inputs (RA0-RA5) traces short and guarded by a ground plane to minimize ADC crosstalk with digital switching noise. Place the crystal at pins 13/14 within 10 mm of the MCU and surround it with a guard trace tied to VSS; per the PIC16C74B datasheet, long oscillator traces cause frequency drift and ADC conversion errors. NC pins (41-44) should be left floating per Microchip application notes.
PIC16C74B is OTP - once programmed it cannot be cleared. Therefore always validate firmware on a PIC16F74-I/L (Flash equivalent, same 44-PLCC footprint) before committing production code. Ensure ICSP programming lines PGC/PGD (RB6/RB7, pins 39/40) have no series resistors >470 ohm; larger values will violate the In-Circuit Serial Programming timing. Estimated: programming pulse rise time must be <50 ns to pass Microchip spec.
Информация о соответствии
The Microchip PIC16C family OTP C-parts are typically leaded (SnPb) and are flagged as non-RoHS by default; check the device marking or factory documentation for specific lead-free variants. AEC-Q100 automotive qualification has not been obtained - use PIC16C74B-04E/Q or PIC18F equivalent for AEC-Q100 requirements.
