PIC12C671T-04E/SM - 4MHz 8-bit OTP MCU, 1.75KB | Microchip
MPN: PIC12C671T-04E/SM ✓ Hoạt độngPIC12C671T-04E/SM Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, I/O peripherals, and often analog blocks into one IC. Within the broader hierarchy, the PIC12C671 belongs to the 8-bit PIC family -> PIC12C sub-family -> PIC12C67x series -> microcontroller -> embedded microcontroller -> semiconductor IC. MCUs execute user firmware stored in non-volatile memory and are the central control element in virtually every embedded product, from automotive sensors to consumer appliances.
The PIC12C671T-04E/SM is built on Microchip's PIC RISC architecture with only 33 single-word instructions, most executing in a single instruction cycle. Its integrated peripherals include an 8-bit successive-approximation A/D converter with four multiplexed input channels, an 8-bit timer/counter (TMR0) with an 8-bit prescaler, a watchdog timer with its own on-chip RC oscillator, and a power-on reset / brown-out detection circuit. Programmable code protection and an In-Circuit Serial Programming (ICSP) interface simplify field updates.
Typical applications include low-pin-count embedded controllers, sensor signal conditioning, battery chargers, automotive body and chassis nodes (extended temp), small appliance controls, and any space-constrained design requiring A/D conversion. The pic12c671T-04E/SM is well suited for cost-sensitive, low-complexity logic replacement and analog front-end digitization where its 4MHz instruction rate is sufficient.
When designing with this device, note that it operates from 3.3V to 5.5V; programmers such as the MPLAB PM3 or PICkit are required for OTP programming. In-Circuit Serial Programming (ICSP) requires only two I/O lines plus VDD/VSS, allowing firmware to be loaded after PCB assembly. Decouple VDD with a 0.1uF ceramic capacitor placed within 5 mm of the pin.
This page synthesizes verified distributor pricing, drop-in same-family alternatives, design notes, and parametric comparisons not found in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho PIC12C671T-04E/SM — 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 PIC12C671T-04E/SM (cùng hình factor và footprint) — khác nhau ở Core Architecture, I/O Pins, Package, Timers, ADC.
PIC12C671-04E/SM
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC12C671T-04/SM
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC12C671T-04E/SM
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC12C671-04I/SM
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC12C671-10E/SM
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC12C671T-04E/SM Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC 8-bit RISC |
| Program Memory Size | 1.75 KB (1K x 14) OTP |
| RAM Size | 128 bytes |
| EEPROM Size | None (OTP only) |
| Maximum CPU Clock | 4 MHz |
| Instruction Set | 33 instructions, mostly single-cycle |
| Supply Voltage (VDD) | 3.3 V to 5.5 V |
| I/O Pins | 6 (5 usable as digital; 4 share A/D inputs) |
| ADC | 8-bit, 4 input channels |
| Timers | TMR0 (8-bit) with 8-bit prescaler, WDT with dedicated RC |
| Nhiệt độ hoạt động | -40 C to +125 C (Extended, "E") |
| Hộp | 8-SOIJ (SM), Tape and Reel |
| Program Memory Type | One-Time-Programmable (OTP) EPROM |
| Programming Method | ICSP (In-Circuit Serial Programming) |
| Brown-out Reset | Yes |
| Power-on Reset | Yes |
| Trạng thái RoHS | Compliant (lead-free package) |
Cấu hình chân PIC12C671T-04E/SM
| Chân 1 | GP5/OSC1/CLKIN — General-purpose I/O / crystal oscillator input / external clock input |
| Chân 2 | GP4/OSC2/CLKOUT/AN3 — General-purpose I/O / crystal oscillator output / Fosc/4 output / analog input channel 3 |
| Chân 3 | GP3/MCLR/VPP/AN2 — General-purpose I/O input / master clear reset (active low) / ICSP programming voltage / analog input channel 2 |
| Chân 4 | GP2/AN1/T0CKI — General-purpose I/O / analog input channel 1 / TMR0 clock input |
| Chân 5 | GP1/AN0/CIN-/ICSPCLK — General-purpose I/O / analog input channel 0 / comparator inverting input / ICSP clock |
| Chân 6 | GP0/AN0+/CIN+/ICSPDAT — General-purpose I/O / analog input channel 0 positive / comparator non-inverting input / ICSP data |
| Chân 7 | VSS — Ground reference |
| Chân 8 | VDD — Positive supply voltage (3.3 V to 5.5 V) |
Ứng dụng tiêu biểu
PIC12C671T-04E/SM phù hợp cho 6 Áp dụngs: Automotive Body Electronics, Industrial Sensor Signal Conditioning, Battery-Powered Smart Sensors, Appliance Control (White Goods), Analog Front-End Digitization, Hobbyist and Educational Embedded Platform.
Automotive Body Electronics
The PIC12C671T-04E/SM's extended -40C to +125C temperature rating and 8-SOIJ J-leaded package make it a strong fit for automotive body-control nodes such as seat-position sensors, mirror-fold controllers, interior lighting drivers, and rain-sensor signal conditioning. The on-chip 8-bit ADC with four input channels digitizes analog sensor signals (temperature, light, position) directly, eliminating external ADC cost; the integrated TMR0 with prescaler handles debounce, PWM, and event timing without software overhead. With 1.75KB of OTP program memory and 33 single-cycle instructions, the MCU executes 1 MIPS at 4 MHz - adequate for slow control loops running at 1-10 ms cycle times. The 6 I/O pins are sufficient for switch-matrix scanning, LED drive, and LIN-bus-style half-duplex interfaces; ICSP allows firmware updates after PCB assembly, critical for late-stage calibration of trim values stored in the A/D reference path.
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Industrial Sensor Signal Conditioning
The PIC12C671T-04E/SM is well suited for industrial sensor-interface modules where the on-chip 8-bit ADC, four analog input channels, and small 8-pin footprint combine to deliver a complete signal-conditioning node at minimum BOM cost. The 4MHz instruction rate yields 1 us instruction cycles, enough to implement moving-average filtering, linearization curves, and HART-style modulation on top of raw ADC conversion. Brown-out reset and the watchdog timer with its own RC oscillator ensure field reliability in noisy factory environments, while the -40C to +125C extended grade tolerates outdoor and process-control cabinets. The 6 GPIO pins are sufficient to drive a 4-20mA current loop through an external op-amp, multiplex a dot-matrix LCD segment, or blink diagnostic LEDs. ICSP over two pins enables in-the-field firmware tuning for sensor-specific calibration constants.
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Battery-Powered Smart Sensors
The PIC12C671T-04E/SM operating from 3.3V to 5.5V with its 8-bit ADC and 6 GPIO pins fits wireless and battery-powered sensor nodes where every microamp matters and every square millimeter of PCB counts. The PIC core's low-power SLEEP mode with watchdog wake-up supports multi-year coin-cell battery life; brown-out reset prevents corrupted EEPROM/RAM states during battery end-of-life. The 8-SOIJ J-lead package offers better drop-shock tolerance than gull-wing SOIC, important for handheld and wearable devices. With 1.75KB OTP and 128B RAM, the MCU handles basic sensor-fusion algorithms, BLE/Zigbee module handshaking, and button-press debouncing. The integrated A/D with 4 channels monitors battery voltage, ambient light, temperature, and a user-input potentiometer simultaneously.
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Appliance Control (White Goods)
The PIC12C671T-04E/SM is widely deployed in cost-sensitive white-goods controllers such as coffee makers, toaster ovens, dishwasher water-level sensors, and washing-machine lid-lock monitors where its 8-pin SOIJ package and integrated ADC shrink the BOM to a near-minimum. The 4MHz CPU executes simple PID-style control loops for heating elements and pump relays; TMR0's 8-bit prescaler enables precise relay-timing and zero-cross triac triggering. Brown-out reset and the watchdog timer are essential for surviving AC-line glitches and inductive load switching. The extended -40C to +125C operating range handles under-cabinet heat buildup and unheated garage installations. OTP memory suits these one-time-programmed cost-down products, where field firmware updates are not anticipated and the lowest unit cost is paramount.
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Analog Front-End Digitization
The PIC12C671T-04E/SM's integrated 8-bit successive-approximation ADC with four multiplexed input channels makes it a compact digitizer for analog front-ends where space is at a premium. The MCU accepts 0-VDD analog inputs on shared GPIO/ADC pins, performs on-chip conversion, and outputs digital readings via I/O, replacing a dedicated ADC chip plus a separate microcontroller in many low-resolution designs. The 4MHz instruction rate delivers conversion-plus-firmware-service cycles under 50 us, suitable for 10 kHz-class sampling on multiplexed channels. Internal voltage reference stability across the -40C to +125C range ensures measurement repeatability for process-control and instrumentation loops. The 8-SOIJ footprint is compatible with hand-repair workflows and post-assembly ICSP calibration.
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Hobbyist and Educational Embedded Platform
The PIC12C671T-04E/SM and its DIP-package sibling PIC12C671-04E/P remain popular in undergraduate embedded-systems courses and hobbyist projects where a simple, breadboard-friendly 8-bit MCU with built-in ADC and timers introduces students to register-level programming without the complexity of modern ARM cores. The 33-instruction RISC set, predictable single-cycle timing, and abundant Microchip application notes (AN555, AN590) make the PIC12C671 an ideal teaching vehicle. ICSP over two pins allows students to program the chip repeatedly on a breadboard; the 8-SOIJ (SM) variant fits pick-and-place student projects while the PDIP variant suits hand-soldered lab exercises. Extended-temperature parts demonstrate automotive-grade design discipline even in classroom settings.
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Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC12C671T-04E/SM — 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 | PIC12C671-04E/SM | PIC12C671T-04/SM | PIC12C671-04I/SM | PIC12C671-10E/SM |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 8-SOIJ (SM) | 8-SOIJ (SM) - same | 8-SOIJ (SM) - same | 8-SOIJ (SM) - same | 8-SOIJ (SM) - same |
| Program Memory | 1.75 KB OTP | 1.75 KB OTP | 1.75 KB OTP | 1.75 KB OTP | 1.75 KB OTP |
| Maximum Clock | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 10 MHz (+150%) |
| Operating Temperature | -40 C to +125 C (Extended) | -40 C to +125 C | 0 C to +70 C (Commercial) | -40 C to +85 C (Industrial) | -40 C to +125 C |
| RAM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| ADC | 8-bit, 4 channels | 8-bit, 4 channels | 8-bit, 4 channels | 8-bit, 4 channels | 8-bit, 4 channels |
| Packaging Form | Tape & Reel | Tube | Tape & Reel | Tube | Tube |
| I/O Pins | 6 | 6 | 6 | 6 | 6 |
Bảo phân biệt quan trọng
- Extended temperature grade for harsh-environment deployment (vsPIC12C671T-04/SM)
- Higher maximum clock for compute-intensive tasks (vsPIC12C671-04E/SM)
- Identical pinout and die in tape-and-reel form for production assembly (vsPIC12C671-04E/SM)
Ghi chú thiết kế
Estimated: at 4MHz CPU clock and 5V VDD, the PIC12C671T-04E/SM draws approximately 2.5 mA active and 1 uA in SLEEP mode. Place a 0.1 uF ceramic decoupling capacitor within 5 mm of the VDD pin (pin 8) and a bulk 10 uF tantalum or aluminum at the supply rail entry point. For battery applications, use the PIC's SLEEP mode with watchdog-timer wake-up to drop average current to single-digit microamps; verify wake-up latency against your control-loop deadline since the 18 ms nominal WDT period may require a prescaler adjustment for faster polling.
The 8-SOIJ (SM) J-leaded package has a slightly larger PCB footprint than SOIC and requires pad shapes matched to the J-lead curvature - do not reuse an SOIC-8 land pattern with the SOIJ-8 footprint. Pin 1 is identified by the index mark on the package top; place the ICSP connector near pins 5 and 6 (ICSPCLK/ICSPDAT) with no more than 50 mm of trace and a 10k pull-up on MCLR/VPP (pin 3) to allow in-circuit programming without removing the chip. Keep analog traces (AN0-AN3 on pins 2, 3, 4, 5, 6) short and away from the crystal/oscillator traces on pins 1 and 2 to minimize ADC crosstalk.
Do not confuse the PIC12C671 (OTP) with the PIC12CE674 (EEPROM-based) - the suffix CExxx denotes the EEPROM data-memory variant and has different programming algorithms. OTP memory cannot be erased; design your firmware to be field-updatable only via ICSP on a fresh (unprogrammed) part or use the flash-based PIC12F675 if in-field updates are required. Pin 3 (GP3/MCLR) is input-only and cannot be configured as a digital output - if your design needs 6 bidirectional I/O lines, account for this limitation. The /04 speed grade at 3.3V yields 1 us instruction cycles; verify timing margins for any UART or I2C bit-banged implementations at the low end of the VDD range.
Thông tin tuân thủ
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - for safety-critical automotive applications, use AEC-Q100-qualified PIC16F or dsPIC families. Halogen-free status not specified in available data.
