PIC12CE674-04E/P - 8-Bit 4MHz OTP MCU 3.5KB Flash | Microchip
MPN: PIC12CE674-04E/P ✓ Hoạt độngPIC12CE674-04E/P Tóm tắt
A PIC microcontroller (Programmable Intelligent Computer, or Peripheral Interface Controller) is a class of 8/16/32-bit RISC microcontrollers built on a Harvard architecture - separate program and data buses - that became the de-facto standard for low-pin-count embedded control. The PIC12 family sits at the entry level of Microchip's PIC line (PIC10/12/16/18 hierarchy, scaling up to PIC24/dsPIC and PIC32), prioritizing small package count, low cost, and deterministic interrupt response over raw compute. Within the PIC12 family, the "CE" sub-family specifically adds EEPROM data memory on-chip for parameter storage in user-reprogrammable applications.
Key features of this part include: 6 general-purpose I/O pins multiplexed with ADC inputs and the MCLR/reset function, an 8-bit timer/counter (TMR0) with an 8-bit prescaler, a watchdog timer with its own on-chip RC oscillator for reliable resets, an internal 4 MHz RC oscillator (plus an optional external oscillator), and in-circuit serial programming (ICSP) capability via two pins. The four ADC channels share the I/O pins and offer 8-bit resolution.
Architecturally, the device uses a 14-bit instruction word and an 8-bit data path with a two-stage pipeline, allowing most instructions to complete in one oscillator cycle. The OTP program memory is one-time programmable but supports field updates via ICSP for prototypes and small production runs. Power management features include a power-on reset, brown-out detection, and a SLEEP mode that drops current to sub-microamp levels.
Typical applications include low-cost sensor interfaces, appliance controls, LED lighting controllers, automotive body electronics (under-the-hood sensors), battery chargers, and replacement of discrete logic in 8-pin designs. The integrated ADC and EEPROM make it especially well suited to small-signal analog acquisition with non-volatile calibration storage.
When designing with this MCU, the "E" suffix denotes the extended (-40C to +125C) industrial operating temperature range, which is essential for automotive and outdoor deployments. The OTP program memory requires in-system programming via ICSP - code cannot be erased and rewritten like Flash - so provision a programming header and pre-test all firmware on a Flash-equivalent development device before committing code to OTP production units.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet, optimized for engineers evaluating the PIC12CE674-04E/P for new designs and legacy support.
Bộ thay thế dễ dàng lắp đặt cho PIC12CE674-04E/P — 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 PIC12CE674-04E/P (cùng hình factor và footprint) — khác nhau ở Package, Operating Temperature, Timers, I/O Pins, RoHS Status.
PIC12CE674-04/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC12CE673-10E/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC12CE673-04/P
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC12C672-04E/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC12C672-10/P
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC12CE519-04E/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC12CE674-04E/P Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC 8-bit RISC (Harvard) |
| Instruction Set | 35 single-word instructions, 14-bit wide |
| Program Memory (ROM) | 3.5 KB (2K x 14) OTP |
| Data SRAM | 128 bytes |
| Data EEPROM | 16 bytes |
| Maximum CPU Speed | 4 MHz (10 MHz max for -10 grade) |
| Instruction Cycle Time | 400 ns (single-cycle instructions) |
| Operating Voltage (Vdd) | 2.5 V to 5.5 V |
| I/O Pins | 6 (general purpose) |
| ADC | 4-channel, 8-bit |
| Timers | 1 x 8-bit (TMR0 with 8-bit prescaler) |
| Watchdog Timer | Yes, with dedicated on-chip RC oscillator |
| Oscillator | Internal 4 MHz RC + external oscillator option |
| In-Circuit Programming | ICSP (In-Circuit Serial Programming) |
| Nhiệt độ hoạt động | -40 C to +125 C (Extended, "E" suffix) |
| Hộp | 8-pin PDIP (PDIP-8, through-hole) |
| Số chân | 8 |
| Trạng thái RoHS | Compliant (lead-free) |
Cấu hình chân PIC12CE674-04E/P
| Chân 1 | Vdd — Positive supply voltage (2.5V to 5.5V) |
| Chân 2 | GP5/T1CKI/OSC1/CLKIN — GPIO/Timer1 clock input/oscillator input/external clock input |
| Chân 3 | GP4/AN3/T1G/OSC2/CLKOUT — GPIO/ADC channel 3/Timer1 gate/oscillator output/clock output |
| Chân 4 | GP3/MCLR/Vpp — GPIO input only/Master Clear reset/ICSP programming voltage |
| Chân 5 | GP2/AN2/TOCKI/INT/COUT — GPIO/ADC channel 2/Timer0 clock input/external interrupt/comparator output |
| Chân 6 | GP1/AN1/CIN-/ICSPCLK — GPIO/ADC channel 1/comparator inverting input/ICSP clock |
| Chân 7 | GP0/AN0/CIN+/ICSPDAT — GPIO/ADC channel 0/comparator non-inverting input/ICSP data |
| Chân 8 | Vss — Ground reference |
Ứng dụng tiêu biểu
PIC12CE674-04E/P phù hợp cho 6 Áp dụngs: Automotive Sensor Interface, Battery-Powered Sensor Tag, LED Lighting Controller, Appliance Control Board, Smart Home Edge Node, Replacement of Discrete Logic.
Automotive Sensor Interface
The PIC12CE674-04E/P's extended -40C to +125C temperature range (E suffix), on-chip 4-channel 8-bit ADC, and 16-byte EEPROM data memory for non-volatile calibration storage make it ideal for low-cost automotive sensor nodes. Typical circuits read thermistor or Hall-sensor voltages on the AN0-AN3 channels, apply linearization in firmware, store trim constants in the internal EEPROM, and transmit the result over a single-wire LIN or PWM interface. The 4 MHz core and 400 ns instruction cycle easily handle 10 Hz sample rates with <10% CPU utilization, while the 16B EEPROM retains calibration through power cycles - critical for ABS, MAP, and oxygen-sensor modules that must not lose trim across battery disconnect events.
Được đề xuất
Battery-Powered Sensor Tag
The PIC12CE674-04E/P's sub-microamp SLEEP current (<1 uA with WDT disabled) and 2.5 V minimum supply voltage allow direct connection to two AA alkaline cells for multi-year battery life in remote sensor tags. The on-chip ADC reads moisture, temperature, or contact-closure sensors on a periodic wake-up interval; the 16-byte EEPROM stores the device address and last-known state across reset events. Compared with a discrete 555-timer-plus-ADC solution, the integrated MCU provides more accurate timing, digital filtering, and configurable thresholds via firmware rather than external resistor tweaks.
Được đề xuất
LED Lighting Controller
The PIC12CE674-04E/P drives multi-channel LED strings in architectural and accent lighting fixtures, using the 8-bit timer TMR0 to generate PWM dimming waveforms in firmware. The on-chip ADC monitors photodiode current for ambient-light feedback, while the 16-byte EEPROM stores the user's last brightness setting and color mix across power cycles. With 5 MIPS throughput, the MCU handles both the PWM generation (typically 200 Hz, 8-bit resolution on 2-3 channels) and the DMX-512 or DALI protocol parsing in a single-chip implementation, replacing what would otherwise require a dedicated LED driver plus logic controller.
Được đề xuất
Appliance Control Board
White-goods appliances - washing machines, dishwashers, microwave ovens - frequently use 8-bit PIC microcontrollers like the PIC12CE674-04E/P to drive relays, read user-panel buttons, and sense temperature or water level. The 6 general-purpose I/O pins suffice for simple user-interface boards (4 LEDs, 2 buttons or a 2x2 keypad matrix), while the on-chip ADC handles thermistor-based temperature sensing. The 16-byte EEPROM stores the user's preferred cycle, language, and last fault code, surviving brown-outs and power-line glitches that are common in residential AC environments.
Được đề xuất
Smart Home Edge Node
IoT edge devices for smart-home automation - door/window contact sensors, leak detectors, occupancy sensors - leverage the PIC12CE674-04E/P's small footprint, ADC, and EEPROM to implement compact battery-powered nodes that communicate over sub-GHz radios or one-wire buses. The MCU sleeps at sub-microamp current most of the time, wakes on an external interrupt from a sensor or push-button, transmits the event, and returns to sleep. The 16-byte EEPROM holds the device UUID, network channel, and last-synced state, allowing nodes to rejoin a network after a long power-down without re-provisioning.
Được đề xuất
Replacement of Discrete Logic
The PIC12CE674-04E/P is a cost-effective replacement for legacy 74HC-series glue logic and small gate arrays in industrial equipment, replacing 2-4 logic ICs with a single 8-pin MCU programmed as a state machine. With 6 I/O pins, 3.5KB of program memory, and 5 MIPS throughput, the device can implement custom timing, sequencing, and signal-conditioning functions that would require a dozen discrete gates. Designers benefit from firmware-level reconfigurability - the same PCB can ship with different logic configurations by simply changing the OTP code, eliminating hard-to-source TTL part numbers.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC12CE674-04E/P — 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 | PIC12CE674-04/P | PIC12CE673-10E/P | PIC12C672-04E/P | PIC12CE519-04E/P |
|---|---|---|---|---|---|
| Package | PDIP-8 | PDIP-8 (same) | PDIP-8 (same) | PDIP-8 (same) | PDIP-8 (same) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 3.5 KB OTP | 3.5 KB OTP (same) | 1 KB OTP (-71%) | 3.5 KB OTP (same) | 1 KB OTP (-71%) |
| Data SRAM | 128 bytes | 128 bytes (same) | 128 bytes (same) | 128 bytes (same) | 41 bytes (-68%) |
| Data EEPROM | 16 bytes | 16 bytes (same) | 16 bytes (same) | None (0 bytes) | 16 bytes (same) |
| ADC | 4-channel 8-bit | 4-channel 8-bit (same) | 4-channel 8-bit (same) | 4-channel 8-bit (same) | None |
| Maximum Clock Speed | 4 MHz | 4 MHz (same) | 10 MHz (+150%) | 4 MHz (same) | 4 MHz (same) |
| Operating Temperature | -40C to +125C (E suffix) | 0C to +70C (commercial) | -40C to +125C (E suffix) | -40C to +125C (E suffix) | -40C to +125C (E suffix) |
| I/O Pins | 6 | 6 (same) | 6 (same) | 6 (same) | 6 (same) |
| Voltage Range | 2.5V to 5.5V | 2.5V to 5.5V (same) | 2.5V to 5.5V (same) | 2.5V to 5.5V (same) | 2.5V to 5.5V (same) |
Bảo phân biệt quan trọng
- 16-byte on-chip EEPROM for parameter storage (vsPIC12C672-04E/P)
- Extended -40C to +125C temperature range (vsPIC12CE674-04/P)
- 3.5 KB program memory for richer firmware (vsPIC12CE519-04E/P)
Ghi chú thiết kế
The PIC12CE674-04E/P supports a 2.5 V to 5.5 V supply range, allowing direct operation from 2x AA alkaline cells (3.0 V nominal, dropping to 2.0 V end-of-life) or a regulated 3.3 V/5 V rail. Place a 100 nF decoupling capacitor within 5 mm of the Vdd pin (pin 1) and a 10 uF bulk capacitor on the supply rail to suppress voltage transients during SLEEP-wake transitions. The MCLR pin (pin 4) requires a 10 kohm pull-up to Vdd; if ICSP is used, add a diode to isolate the application reset circuit from the 13 V programming voltage.
The PIC12CE674-04E/P uses OTP (One-Time Programmable) memory, not Flash - code cannot be erased and rewritten like Flash-based PIC12F or PIC16 parts. According to Microchip programming specifications, blank/erased OTP cells read as 0x3FFF (14-bit all-ones), so any firmware must first verify the chip is blank before programming. For development, use a Flash-based PIC12F675 or PIC12F683 dev board first, then commit final firmware to OTP production units - this avoids burning dozens of OTP chips during firmware iteration.
The 8-pin PDIP footprint accepts through-hole assembly with 2.54 mm (0.100 inch) pin pitch. Keep the ICSP header within 50 mm of pins 6 and 7 (ICSPCLK and ICSPDAT) to avoid signal-integrity issues during in-circuit programming. For noisy environments (automotive, industrial), add 10 kohm series resistors on GP0/GP1 (ICSPDAT/ICSPCLK) to dampen ringing; pin 4 (MCLR/Vpp) must have a clamp diode to Vdd to limit programming-voltage transients below 14 V absolute maximum.
Estimated: At maximum 4 MHz clock, 5.5 V supply, and full GPIO switching, the PIC12CE674-04E/P draws about 2.0 mA typical active current and less than 1 uA in SLEEP. Power dissipation at peak operation is roughly 11 mW (5.5 V x 2.0 mA), well below any thermal concern for the PDIP-8 package. However, in automotive under-hood environments at +125 C ambient, derate clock speed and I/O switching frequency by 20% to maintain junction temperature within Microchip's reliability guidelines.
Thông tin tuân thủ
RoHS compliant per Microchip product page. The extended -40C to +125C temperature range supports automotive environments but the part is NOT AEC-Q100 qualified; for AEC-Q100 designs, use the PIC12F683-E/P or PIC16F family with explicit Q100 qualification.
