PIC16C74A-04E/PQ - 8-Bit MCU, 7KB OTP, 4MHz, 44-MQFP | Microchip
MPN: PIC16C74A-04E/PQ ✗ Cuối đờiPIC16C74A-04E/PQ Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip computer integrating a CPU, program memory (ROM/EPROM/Flash/OTP), data RAM, I/O ports, timers, and often analog and serial peripherals on one die. The PIC16C7X mid-range architecture uses a 14-bit instruction word and an 8-bit data path, offering higher code density than 8/12-bit competitors at moderate complexity. The MQFP (Metric Quad Flat Pack) family is a surface-mount plastic-leaded package standardized for mid-pin-count MCUs and is itself part of the broader QFP -> SMD plastic-IC package family.
Key features include 33 digital I/O lines, 25 mA sink/source current per pin, wide operating voltage (2.5V to 6.0V), and typical active current of 15 uA at 5V/4MHz with standby current down to 1 uA at 3V/32 kHz, supporting battery-friendly embedded designs. Brown-out Reset, Power-on Reset, and a programmable code-protection mechanism simplify field deployment of firmware.
The device employs a Harvard RISC architecture with a two-stage pipeline, 35 single-word instructions, and interrupt-driven I/O, allowing deterministic real-time response for control loops and human-interface firmware.
Typical applications include industrial automation controllers, automotive body/comfort modules, HVAC controls, instrumentation front-ends, and embedded sensor hubs that benefit from on-chip A/D conversion and standard serial buses.
When migrating designs, note that Microchip recommends the Flash-based PIC16F74 as a newer pin-compatible successor with in-circuit programmability.
This page consolidates distributor stock, parametric drop-in alternatives, and design considerations that complement but do not replace the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC16C74A-04E/PQ — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC16C74A-04E/PQ (cùng hình factor và footprint) — khác nhau ở Timers, Package, Program Memory Size, Program Memory Type, Operating Temperature Range.
PIC16C74A-04/PQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C74A-10E/PQ
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C74A-20E/PQ
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C74A-04I/PQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F74-I/PQ
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C74A-04E/PQ Tỷ lệ tối đa & tính chất điện
| Product Type | 8-bit CMOS Microcontroller (MCU) |
| Family | PIC16C7X (mid-range) |
| Core | PIC16C RISC (14-bit instruction, 8-bit data path) |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 7KB (4K x 14) |
| RAM Size | 192 x 8 bytes |
| Number of I/O Pins | 33 |
| Tần số xung maksimum | 4 MHz |
| Operating Voltage Range | 2.5 V to 6.0 V |
| A/D Converter | 8 channels, 8-bit |
| Timers | Two 8-bit + one 16-bit |
| Serial Interfaces | I2C, SPI, USART |
| I/O Sink/Source Current | 25 mA / 25 mA |
| Typical Active Current | 15 uA at 5 V, 4 MHz |
| Standby Current | 1 uA typical at 3 V, 32 kHz |
| Hộp / Vỏ | 44-MQFP (10x10 mm) |
| Kiểu lắp đặt | Surface Mount |
| Operating Temperature Grade | Extended ("E" suffix) |
Cấu hình chân PIC16C74A-04E/PQ
| Chân 1 | MCLR/VPP — Master Clear (Reset) input / Programming voltage |
| Chân 2 | OSC1/CLKIN — Crystal oscillator input / external clock input |
| Chân 3 | OSC2/CLKOUT — Crystal oscillator output / clock output |
| Chân 4 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| Chân 5 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| Chân 6 | RA2/AN2 — PORTA bit 2 / Analog input 2 |
| Chân 7 | RA3/AN3/VREF — PORTA bit 3 / Analog input 3 / A/D reference |
| Chân 8 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Chân 9 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SPI slave select |
| Chân 10 | VSS — Ground reference |
| Chân 11 | VDD — Positive supply voltage |
| Chân 12 | RB0/INT — PORTB bit 0 / External interrupt |
| Chân 13 | RB1 — PORTB bit 1 |
| Chân 14 | RB2 — PORTB bit 2 |
| Chân 15 | RB3 — PORTB bit 3 |
| Chân 16 | RB4 — PORTB bit 4 |
| Chân 17 | RB5 — PORTB bit 5 |
| Chân 18 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Chân 19 | RB7/PGD — PORTB bit 7 / ICSP data |
| Chân 20 | VSS — Ground reference |
| Chân 21 | VDD — Positive supply voltage |
| Chân 22 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Chân 23 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| Chân 24 | RC2/CCP1 — PORTC bit 2 / CCP1 |
| Chân 25 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Chân 26 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Chân 27 | RC5/SDO — PORTC bit 5 / SPI data out |
| Chân 28 | RC6/TX/CK — PORTC bit 6 / USART TX / USART clock |
| Chân 29 | RC7/RX/DT — PORTC bit 7 / USART RX / USART data |
| Chân 30 | VSS — Ground reference |
| Chân 31 | VDD — Positive supply voltage |
| Chân 32 | RD0 — PORTD bit 0 |
| Chân 33 | RD1 — PORTD bit 1 |
| Chân 34 | RD2 — PORTD bit 2 |
| Chân 35 | RD3 — PORTD bit 3 |
| Chân 36 | RD4 — PORTD bit 4 |
| Chân 37 | RD5 — PORTD bit 5 |
| Chân 38 | RD6 — PORTD bit 6 |
| Chân 39 | RD7 — PORTD bit 7 |
| Chân 40 | RE0/RD/AN5 — PORTE bit 0 / Read control / Analog input 5 |
| Chân 41 | RE1/WR/AN6 — PORTE bit 1 / Write control / Analog input 6 |
| Chân 42 | RE2/CS/AN7 — PORTE bit 2 / Chip select / Analog input 7 |
| Chân 43 | AVSS — Analog ground |
| Chân 44 | AVDD — Analog positive supply |
Ứng dụng tiêu biểu
PIC16C74A-04E/PQ phù hợp cho 6 Áp dụngs: Industrial Automation Controllers, Automotive Body and Comfort Modules, HVAC Control Systems, Embedded Instrumentation Front-Ends, Sensor Hub and Data Acquisition Nodes, User Interface Keypad and Display Controllers.
Industrial Automation Controllers
The PIC16C74A-04E/PQ fits industrial automation because it offers 33 25 mA sink/source I/O lines that can directly drive relays, solenoids, and indicator LEDs, plus an integrated 8-channel 8-bit A/D converter for reading 4-20 mA or 0-10V process signals without an external ADC. Its 4MHz PIC16C RISC core executes deterministic real-time control loops in motor starters, conveyor sequencers, and PLC-style I/O modules, while the 2.5V to 6.0V supply range accepts 24V-derived industrial rails after regulation. Brown-out Reset and Power-on Reset support reliable cold-start in factory-floor environments where line glitches are common.
Được đề xuất
Automotive Body and Comfort Modules
The PIC16C74A-04E/PQ is well suited to automotive body and comfort modules (window lifters, seat controllers, mirror adjusters, interior lighting) because its 33 high-current I/O lines can drive small DC motors and lamp loads directly, while its extended temperature grade ("E") tolerates under-hood and cabin thermal swings. The integrated I2C/SPI/USART peripherals let the device talk to BCM master controllers and sensor nodes, and the 8-bit A/D monitors analog sensors such as position potentiometers and battery voltage. The 2.5V to 6.0V supply range aligns with 12V automotive rails after clamping.
Được đề xuất
HVAC Control Systems
The PIC16C74A-04E/PQ suits HVAC control boards where its 8-channel 8-bit A/D converter reads thermistor temperature sensors, pressure transducers, and humidity probes, while 25 mA I/O lines switch triac drivers or relay coils that actuate fans, dampers, and compressors. The 7KB OTP program memory stores the full PID control firmware plus the user-interface lookup tables for fan curves and setpoint scheduling. Operating from 2.5V to 6.0V, the device runs directly from a 5V regulated supply common in HVAC control boards, and the extended temperature grade handles equipment-room thermal conditions.
Được đề xuất
Embedded Instrumentation Front-Ends
The PIC16C74A-04E/PQ serves as an instrumentation front-end because its 8-channel 8-bit A/D converter digitizes sensor signals at up to 4MHz system clock and the USART peripheral streams results to a host PC, PLC, or display controller at standard baud rates. The PIC16C RISC core runs scaling and linearization routines on each conversion while the 192-byte RAM holds temporary sample buffers. The 44-MQFP package keeps the design compact for handheld or panel-mount instruments, and the 15 uA typical active current at 5V/4MHz supports battery-powered portable meters.
Được đề xuất
Sensor Hub and Data Acquisition Nodes
The PIC16C74A-04E/PQ works as a multi-sensor hub because its I2C and SPI peripherals interface to external temperature sensors, accelerometers, and EEPROM memory, while the on-chip 8-bit A/D digitizes analog channels at rates adequate for environmental monitoring. The 7KB program memory stores sensor drivers and averaging algorithms, and the 33 I/O lines provide discrete control of LED indicators and actuators. Brown-out Reset and Power-on Reset handle noisy industrial sensor-bus power conditions gracefully, and the low 1 uA standby current extends battery life in remote monitoring nodes.
Được đề xuất
User Interface Keypad and Display Controllers
The PIC16C74A-04E/PQ is a strong fit for keypad-scanning and display-refresh controllers because it offers 33 I/O pins to matrix-scan up to 64 keys or refresh multiplexed LED/LCD segments, while 25 mA sink/source current directly drives LED displays without external buffers. The 16-bit Timer1 provides accurate debounce and refresh timing, and the USART peripheral can relay key events to a host processor. The 7KB OTP holds full key-mapping and display-font lookup tables, and the extended temperature grade supports appliance, kiosk, and industrial panel environments.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C74A-04E/PQ — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC16C74A-04/PQ | PIC16C74A-10E/PQ | PIC16C74A-20E/PQ | PIC16C74A-04I/PQ | PIC16F74-I/PQ |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-MQFP (PQ) 10x10 mm | 44-MQFP (PQ) - same | 44-MQFP (PQ) - same | 44-MQFP (PQ) - same | 44-MQFP (PQ) - same | 44-MQFP (PQ) - same |
| Max Clock Frequency | 4 MHz | 4 MHz | 10 MHz | 20 MHz | 4 MHz | 20 MHz |
| Program Memory Type | OTP EPROM, 7KB | OTP EPROM, 7KB | OTP EPROM, 7KB | OTP EPROM, 7KB | OTP EPROM, 7KB | Flash, 7KB |
| RAM Size | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 192 bytes |
| Number of I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 |
| Operating Voltage Range | 2.5 V to 6.0 V | 2.5 V to 6.0 V | 2.5 V to 6.0 V | 4.5 V to 6.0 V | 2.5 V to 6.0 V | 2.0 V to 6.0 V (extended) |
| Temperature Grade | Extended ("E") | Commercial | Extended ("E") | Extended ("E") | Industrial ("I") | Industrial ("I") |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND | Active |
Bảo phân biệt quan trọng
- Extended temperature grade ("E") over commercial variant (vsPIC16C74A-04/PQ)
- Flash memory with ICSP support (vsPIC16F74-I/PQ)
- Higher maximum clock frequency (vsPIC16C74A-20E/PQ)
Ghi chú thiết kế
The PIC16C74A-04E/PQ uses OTP-EPROM program memory, so firmware cannot be field-upgraded. Designers planning firmware revisions should select the Flash-based PIC16F74 in the same 44-MQFP package instead, otherwise a software bug forces mechanical replacement of every programmed part. When migrating, verify that the PIC16F74 oscillator configuration bits, ICSP programming pins (RB6/PGC, RB7/PGD), and A/D converter registers match your firmware intent before committing to layout.
Place decoupling capacitors (100 nF ceramic) on each VDD/VSS pin pair as close to the IC body as possible to suppress digital switching noise that could couple into the A/D converter channels. Add a 10 uF bulk electrolytic or tantalum at the supply entry point. For applications that digitize low-level analog signals, separate the analog AVDD/AVSS pins with their own ferrite-bead-isolated supply and connect AVSS to VSS at a single star ground to minimize digital noise in the A/D readings.
The PIC16C74A-04E/PQ typically draws 15 uA at 5V/4MHz active and 1 uA in standby at 3V/32 kHz, per the PIC16C7X datasheet. Brown-out Reset is configured via configuration fuses; set the BOR voltage threshold above the minimum operating voltage required by analog peripherals to avoid ADC reference collapse during brown-out. For battery-powered designs, leverage the 1 uA standby mode plus the Watchdog Timer wake-up interval to extend battery life while still maintaining system supervision.
Thông tin tuân thủ
RoHS, REACH, lead-free, and halogen-free status were not present in the verified web data and are marked unknown. AEC-Q100 is not applicable because the PIC16C74A-04E/PQ is not specifically marketed as an automotive-qualified part; the "E" suffix is a temperature grade, not an automotive qualification.
