PIC12C508T-04E/SM - 8-Bit 4MHz OTP MCU 768B | Microchip
MPN: PIC12C508T-04E/SM ✓ Hoạt độngPIC12C508T-04E/SM Tóm tắt
What is an 8-bit OTP microcontroller? An 8-bit OTP MCU is a small single-chip computer that executes one instruction per clock cycle through a reduced-instruction-set core, where program memory is written once at production or in-circuit and cannot be electrically erased. The PIC12C5xx family sits in the hierarchy: 8-bit microcontroller -> RISC microcontroller -> embedded MCU -> semiconductor. It is designed for cost-sensitive, space-constrained applications where a full flash-based MCU would be overkill.
Key features include a 4 MHz maximum operating frequency, 2.0 V to 5.5 V supply range, an integrated 8-bit timer/counter (TMR0) with 8-bit programmable prescaler, watchdog timer with its own on-chip RC oscillator, power-on reset (POR), device reset timer (DRT), and selectable 4 MHz or 37 kHz internal oscillator modes. The PIC12C508T-04E/SM operates across the extended -40°C to +125°C temperature range.
The device uses a 12-bit instruction word architecture yielding a 2:1 code compression advantage over competing 8-bit MCUs, allowing more functional code in 768 bytes of OTP than most peers. With only 33 single-word/single-cycle instructions, the learning curve is short and interrupt latency is deterministic.
Typical applications include consumer electronics remote controls, sensor interface front-ends, LED driver controllers, small appliance control boards, battery chargers, and low-end industrial control modules where minimal BOM and small footprint matter most.
When designing with this part, note that the OTP memory cannot be reprogrammed in the field - choose the PIC12C508A flash-based variants or the PIC10F/12F series for development or in-field updates. The '04' speed suffix denotes the 4 MHz internal oscillator; the 'E' suffix denotes the extended temperature grade.
This page synthesizes distributor pricing, verified drop-in alternatives, application context, and design considerations not aggregated in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho PIC12C508T-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 PIC12C508T-04E/SM (cùng hình factor và footprint) — khác nhau ở Program Memory Size, Core Architecture, Operating Temperature Range, Package, Program Memory Type.
PIC12C508-04E/SM
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC12C508T-04/SM
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC12C508A-04E/SM
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC12C508AT-04E/SM
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC12C508A-04I/SM
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC12F508-I/SM
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC12C508T-04E/SM Tỷ lệ tối đa & tính chất điện
| Core Architecture | 8-bit PIC RISC |
| Instruction Set | 33 single-word/single-cycle instructions |
| Tần số xung maksimum | 4 MHz |
| Program Memory Type | OTP (One-Time Programmable) EPROM |
| Program Memory Size | 768 bytes (512 x 12) |
| Data RAM | 25 bytes |
| Supply Voltage Range | 2.0 V to 5.5 V |
| Khoảng nhiệt độ hoạt động | -40°C to +125°C (Extended, 'E' grade) |
| I/O Pins | 5 (GP0-GP4, GP5 is MCLR only) |
| Timers | 1 x 8-bit TMR0 with 8-bit programmable prescaler |
| Watchdog Timer | Yes, with dedicated on-chip RC oscillator |
| Reset Features | Power-On Reset (POR), Device Reset Timer (DRT) |
| Oscillator Modes | Internal 4 MHz, Internal 37 kHz, External |
| Hộp | 8-SOIJ (5.30 mm body width, J-lead) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 1 (per JEDEC J-STD-020) |
| Trạng thái RoHS | Compliant |
| Code Protection | Programmable |
Cấu hình chân PIC12C508T-04E/SM
| Chân 1 | GP5/OSC1/CLKIN — General-purpose I/O / external clock input / oscillator pin 1 |
| Chân 2 | GP0/AN0 — General-purpose I/O / analog input channel 0 |
| Chân 3 | GP1/AN1/VREF — General-purpose I/O / analog input channel 1 / voltage reference |
| Chân 4 | GP2/AN2/T0CKI — General-purpose I/O / analog input channel 2 / TMR0 clock input |
| Chân 5 | GP3/MCLR/VPP — General-purpose input-only / Master Clear reset / programming voltage |
| Chân 6 | GP4/AN3/OSC2 — General-purpose I/O / analog input channel 3 / oscillator pin 2 |
| Chân 7 | VSS — Ground reference |
| Chân 8 | VDD — Positive supply voltage (2.0 V to 5.5 V) |
Ứng dụng tiêu biểu
PIC12C508T-04E/SM phù hợp cho 6 Áp dụngs: Consumer Remote Control, LED Lighting Controllers, Battery Chargers, Small Appliance Controls, Sensor Interface Modules, Toy and Hobby Electronics.
Consumer Remote Control
The PIC12C508T-04E/SM is widely deployed in IR/RF remote control handsets where its 4 MHz RISC core, 768-byte OTP, and 25-byte RAM are sufficient to encode button scan matrices and modulation patterns. The device draws sub-mA active current at 3 V and microamp-level sleep current, enabling years of operation from a coin cell or 2x AAA cells. The 5 usable I/O pins (GP0-GP2, GP4-GP5) easily accommodate a 4x4 scan matrix via a diode encoder or a direct 4-5 button interface. Its deterministic 33-instruction core eliminates the need for an RTOS.
Được đề xuất
LED Lighting Controllers
For low-end decorative and architectural LED drivers, the PIC12C508T-04E/SM delivers precise PWM dimming control through its 8-bit TMR0 with programmable prescaler. The 4 MHz internal oscillator and 2.0 V to 5.5 V supply range allow direct operation from rectified 5 V rails or battery packs. The OTP memory stores fixed dim curves and color sequences, eliminating external EEPROM. Five I/O pins comfortably drive 3-channel RGB or 5-channel single-color LED strings via external MOSFET drivers. The extended -40°C to +125°C temperature range supports outdoor fixtures.
Được đề xuất
Battery Chargers
Simple NiCd, NiMH, and Li-ion charger circuits use the PIC12C508T-04E/SM to monitor voltage, temperature, and charge time via its 5 I/O pins driving ADC inputs through external resistor networks. The integrated watchdog timer ensures charger restart on firmware upset, while the power-on reset guarantees clean startup. The 768-byte OTP accommodates CC/CV charge algorithms with safety timers. With 2.0 V minimum VDD, the MCU operates directly from a single Li-ion cell. The extended -40°C to +125°C range supports automotive and industrial charger environments.
Được đề xuất
Small Appliance Controls
In microwave ovens, coffee makers, toasters, and similar white goods, the PIC12C508T-04E/SM coordinates keypad input, display driving, relay control, and sensor monitoring. The 8-SOIJ package fits within tight enclosure constraints, while the OTP memory locks in firmware to prevent unauthorized modification. The watchdog timer and power-on reset deliver the reliability needed for unattended operation. Five I/O pins handle keypad scan, buzzer drive, and a couple of relay outputs via transistors, with TMR0 providing timing for cooking or brewing cycles.
Được đề xuất
Sensor Interface Modules
Industrial sensor signal-conditioning boards pair the PIC12C508T-04E/SM with bridge sensors, thermistors, or analog front ends to digitize, linearize, and transmit readings via UART or PWM. The 4 MHz core and 12-bit instruction width handle basic calibration math in firmware. With 25 bytes of RAM, the MCU can buffer readings and execute simple moving-average filters before output. The extended temperature range and 5.5 V maximum supply suit 24 V industrial loops with simple resistor dividers. The deterministic instruction timing enables precise PWM-based analog output.
Được đề xuất
Toy and Hobby Electronics
Cost-sensitive toys, electronic games, and hobby kits use the PIC12C508T-04E/SM for sound playback, motor control, and button interfaces. The OTP memory locks in firmware to protect IP from copying, and the 8-pin SOIJ package integrates into the smallest form factors. The 2.0 V minimum VDD enables operation from a single CR2032 coin cell or 2x AA alkaline cells. The low active current under 1 mA and sub-microamp sleep current preserve battery life. Five I/O pins drive LEDs, piezo buzzers, and a couple of low-current DC motors via external transistors.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC12C508T-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 | PIC12C508-04E/SM | PIC12C508T-04/SM | PIC12C508A-04E/SM | PIC12F508-I/SM |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 8-SOIJ (5.30 mm) | 8-SOIJ (5.30 mm) - same | 8-SOIJ (5.30 mm) - same | 8-SOIJ (5.30 mm) - same | 8-SOIJ (5.30 mm) - same |
| Program Memory | 768 B OTP (512 x 12) | 768 B OTP (512 x 12) | 768 B OTP (512 x 12) | 768 B OTP (512 x 12) | 500 B Flash |
| RAM | 25 B | 25 B | 25 B | 25 B | 25 B |
| Max Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Operating Temperature | -40C to +125C (Extended) | -40C to +125C (Extended) | 0C to +70C (Commercial) | -40C to +125C (Extended) | -40C to +85C (Industrial) |
| Memory Type | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | Flash (reprogrammable) |
| Silicon Revision | Original PIC12C508 | Original PIC12C508 | Original PIC12C508 | Improved 'A' revision | Flash PIC12F508 |
| I/O Pins | 5 (GP0-GP2, GP4-GP5) | 5 | 5 | 5 | 5 |
Bảo phân biệt quan trọng
- Tape and Reel packaging with Extended temperature grade (vsPIC12C508-04E/SM)
- Improved 'A' silicon revision with better oscillator accuracy (vsPIC12C508T-04E/SM)
- Reprogrammable flash memory for development and field updates (vsPIC12F508-I/SM)
Ghi chú thiết kế
The PIC12C508T-04E/SM operates from 2.0 V to 5.5 V VDD. Place a 100 nF decoupling capacitor as close as possible to the VDD pin (Pin 8) to suppress high-frequency noise. For battery applications drawing peak currents below 10 mA, add a bulk 10 uF tantalum or ceramic capacitor near the supply pin. The integrated power-on reset (POR) eliminates the need for external reset circuitry, but ensure VDD rise time meets the datasheet specification of 0.05 V/ms or faster for reliable POR.
Estimated: configuring GP3 as a general-purpose input is only available on PIC12C508A; on the original PIC12C508, GP3 serves only as MCLR/VPP and cannot be used as a digital input. Programmers must verify this before board design. Also, OTP memory cannot be electrically erased - verify firmware with a flash-based PIC12F508 prototype before committing to PIC12C508T-04E/SM production. Note that the 'T' suffix is purely a packaging indicator (Tape and Reel) and does not affect electrical performance.
The 8-SOIJ package uses J-leads on a 5.30 mm body width. Follow the land pattern recommended in the Microchip PIC12C5xx datasheet (DS40139E) - SOIJ pads are wider than SOIC pads and require specific stencil design for reflow soldering. Place the IC close to supporting components (resonator, decoupling caps, I/O connectors) to minimize loop areas. For noisy environments, route sensitive analog inputs (AN0-AN3) away from high-current switching traces and add 10-100 ohm series resistors with 100 nF caps to ground for RC filtering.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product page. Industrial extended temperature grade -40C to +125C; not AEC-Q100 qualified for automotive use. Lead-free and halogen-free per Microchip environmental certification.
