PIC12F635T-I/MD - 8-bit PIC MCU, 1.75KB Flash, 6 I/O | Microchip
Артикул: PIC12F635T-I/MD ✓ Активен| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $0.5412 | $0,54 |
| 10 | $0.49 | $4,90 |
| 100 | $0.43 | $43,00 |
| 500 | $0.38 | $190,00 |
| 1.000 | $0.34 | $340,00 |
| 3.000 | $0.3 | $900,00 |
PIC12F635T-I/MD Обзор
An 8-bit PIC microcontroller is a low-power, deterministic single-core processor built on a Harvard architecture with separate program and data buses, belonging to the broader microcontroller -> embedded controller -> semiconductor category. Its strengths are low cost, low quiescent current, fast interrupt response, and a tiny instruction set that compiles to highly compact code - making PIC MCUs dominant in cost-sensitive, pin-constrained, battery-powered applications such as remote controls, sensor nodes, and appliance front panels.
Key features include 6 general-purpose I/O pins (each capable of interrupt-on-change and weak pull-up), one analog comparator with internal programmable reference, an 8-bit and a 16-bit timer, a hardware UART, and the LF (low-frequency) signal-chain block for KEELOQ-compatible security learning applications. The device includes an internal 4/8 MHz oscillator calibrated to +/-1 percent, supporting both INTOSC and low-power LFINTOSC modes for sleep-current-sensitive designs. Hardware diagnostic features such as on-chip debug and In-Circuit Serial Programming (ICSP) are retained on dedicated pins.
Architecturally, the PIC12F635 uses a 14-bit wide instruction word with single-cycle execution except for program branches, and an 8-level deep hardware stack. The AES encryption engine, security lock bits, and KEELOQ decoder are integrated to support encrypted remote-entry receivers. Internal peripherals connect via an 8-bit data bus and are mapped into the SFR space; the device supports up to 256 bytes of register-mapped SRAM with banked access for low-end C compilers.
Typical applications include automotive RKE/remote keyless entry receivers, secure token and authentication peripherals, simple sensor signal-conditioning front ends with on-chip comparator output, low-power remote-control transmitters, and consumer appliance user-interface controllers. The DFN-8 package is suited to space-limited designs where height must stay under 1 mm, including key fobs, smart-card readers, and sealed sensor pods.
When designing with this device, place the ICSPDAT/ICSPCLK trace pair symmetrically to avoid coupling noise into the analog comparator input, and provide a bulk decoupling capacitor (>=1 uF) plus a high-frequency 100 nF cap directly across VDD/VSS. Programming must leave both the clock and data ICSP lines accessible through test points or pads to allow in-field firmware updates via Microchip's MPLAB tools.
Аналоги без доработки для PIC12F635T-I/MD — 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 PIC12F635T-I/MD (тот же форм-фактор и посадочное место) — отличается по Timers, Package, Core Architecture, Program Memory (Flash), Communication.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
PIC12F635-I/MD
✅ Прямая замена✓ В наличии
$1.18 / шт.
Открыть даташит →PIC12F635T-I/MF
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
PIC12F636-I/MD
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
PIC12F609-I/MD
✅ Прямая замена✓ В наличии
$0.71 / шт.
Открыть даташит →PIC12F615-I/MD
✅ Прямая замена✓ В наличии
$0.64 / шт.
Открыть даташит →PIC12F635T-I/MD Максимальные параметры и электрические характеристики
| Core Processor | PIC |
| Core Size | 8-bit |
| Program Memory Size | 1.75 KB Flash |
| RAM Size | 64 bytes |
| EEPROM Size | 128 bytes |
| Maximum Clock Speed | 20 MHz |
| Supply Voltage Range | 2.0 V to 5.5 V |
| Number of I/O Pins | 6 |
| Peripherals | Brown-out Detect, Comparator, POR, WDT |
| Connectivity | UART/USART |
| Timers | 1 x 8-bit, 1 x 16-bit |
| Data Converters | Analog comparator only (no ADC) |
| Рабочая температура | -40 C to +85 C (Industrial) |
| Корпус | 8-pin DFN (3 x 3 x 0.9 mm) |
| Тип монтажа | Surface Mount |
| Уровень MSL | 1 (Unlimited) |
| Статус RoHS | Compliant |
| Lead-Free | Yes |
Конфигурация выводов PIC12F635T-I/MD
| Контакт 1 | VDD — Positive power supply (2.0 V to 5.5 V) |
| Контакт 2 | GP5/T1CKI/OSC1/CLKIN/ICSPCLK — GPIO5 / Timer1 clock / external oscillator input / ICSP clock |
| Контакт 3 | GP4/AN3/T1G/OSC2/CLKOUT/ICSPDAT — GPIO4 / analog channel 3 / Timer1 gate / oscillator output / ICSP data |
| Контакт 4 | GP3/MCLR/VPP — GPIO3 / Master Clear reset (active-low) / programming voltage input |
| Контакт 5 | GP2/AN2/T0CKI/INT/COUT/CCP1 — GPIO2 / analog channel 2 / Timer0 clock / external interrupt / comparator output / CCP1 |
| Контакт 6 | GP1/AN1/CIN-/VREF/ICSPCLK — GPIO1 / analog channel 1 / comparator inverting / voltage reference / ICSP clock |
| Контакт 7 | GP0/AN0/CIN+/INT0/ICSPDAT — GPIO0 / analog channel 0 / comparator non-inverting / external interrupt / ICSP data |
| Контакт 8 | VSS — Ground reference |
Типичное применение
PIC12F635T-I/MD подходит для 6 применениеs: Automotive Remote Keyless Entry (RKE) Receivers, Secure Authentication Tokens and Encrypted Fobs, Low-Power Remote Control Transmitters, Compact Sensor Signal-Conditioning Front Ends, Consumer Appliance User-Interface Controllers, Industrial Sensor Pods and Edge Nodes.
Automotive Remote Keyless Entry (RKE) Receivers
The PIC12F635T-I/MD is a workhorse for automotive RKE receiver nodes thanks to its integrated KEELOQ hardware decoder and hardware AES block, which decode encrypted rolling-code transmissions from a key fob with zero software overhead. Its 8-pin DFN package (3 x 3 mm) and 2.0-5.5 V supply operate directly from a 3 V coin cell or 5 V regulated body rail, while the on-chip analog comparator and CVREF simplify wake-on-RF signal conditioning without an external op-amp. With 1.75 KB Flash and 128 B EEPROM, the firmware fits a full KEELOQ decoder plus an LED/Horn driver state machine. Compared with a software-only AES approach on a generic 8-bit MCU, the hardware block reduces code size by 1.5-2 KB and shortens decode latency, helping meet the strict response-time budget required for body-control modules.
Рекомендуется
Secure Authentication Tokens and Encrypted Fobs
Authentication peripherals such as banking dongles, smart-card readers, and access-control fobs benefit from the PIC12F635T-I/MD's hardware AES block and code-protect lock bits, which provide tamper-resistant key storage without external secure elements. The 8-pin DFN footprint keeps the BOM small enough to fit inside an inline key-fob shell, and the 20 MHz clock allows sub-50 ms cryptographic challenge-response operations at typical security-token rates. Its -40 C to +85 C industrial temperature range ensures operation in outdoor or vehicle cabin environments. Compared with software-AES on a generic PIC10F or AVR, the dedicated hardware AES engine reduces active current and shortens wake-to-respond latency, critical for battery-life targets above 3 years on a CR2032.
Рекомендуется
Low-Power Remote Control Transmitters
The PIC12F635T-I/MD suits low-power remote-control transmitters where sleep current below 1 uA is mandatory and a small, cheap 8-pin controller is preferred over a larger Cortex-M device. Its LFINTOSC (low-frequency internal oscillator) drives Watchdog wake-up cycles that allow years of standby on a CR2032 cell. The integrated analog comparator can be wired to the SAW or MEMS sensor for proximity-trigger functions, and the 6 GPIO pins support matrix-key or pushbutton inputs plus an IR LED driver output. Compared with a discrete 555 timer + button matrix, the PIC12F635 firmware-defined behavior lets one device cover multiple SKUs with different key codes - a major logistics simplification for consumer electronics OEMs.
Рекомендуется
Compact Sensor Signal-Conditioning Front Ends
In compact sensor modules where PCB area is at a premium, the PIC12F635T-I/MD provides a comparator-based signal-conditioning front end that filters and digitizes analog sensor outputs without an external op-amp chain. The on-chip CVREF (programmable voltage reference) supplies a stable threshold for window-comparator arrangements, while the UART/USART ports the conditioned digital signal to a host MCU or wireless transceiver. The 8-pin DFN package enables the entire analog front end plus digital interface to occupy less than 25 mm squared of PCB. Compared with a discrete op-amp + comparator + MCU chain, the PIC12F635 solution reduces BOM cost by 30-50 percent and shrinks the bill-of-materials for thermocouples, photo-diodes, and Hall-effect sensors.
Рекомендуется
Consumer Appliance User-Interface Controllers
The PIC12F635T-I/MD fits appliance user-interface controllers such as coffee machines, microwave ovens, and air purifiers that need a small, reliable 8-bit MCU to scan a key matrix, drive a 7-segment display or LED bar, and talk to the main appliance MCU over UART. The 6 GPIO support a 3x3 key matrix with interrupt-on-change wake-up, the 16-bit timer provides accurate debounce and LED-PWM dimming, and the on-chip comparator supports capacitive-touch sensing via an external RC network. The 2.0-5.5 V supply works directly from a 3.3 V or 5 V rail, while -40 C to +85 C operation covers kitchen and laundry environments. Compared with mechanical switches and discrete logic, the firmware-driven approach enables multiple SKUs on a single hardware platform.
Рекомендуется
Industrial Sensor Pods and Edge Nodes
Industrial sensor pods for temperature, pressure, and process monitoring benefit from the PIC12F635T-I/MD's small footprint, wide supply range, and industrial temperature rating. The internal 4/8 MHz calibrated oscillator eliminates external clock components, the BOD (brown-out detect) prevents corruption during supply dips, and the 6 GPIO can drive a sensor, LED indicator, and UART/RS-485 link without expansion. The hardware AES engine lets the pod sign data packets before transmission, supporting authenticated telemetry in SCADA systems. Compared with a fully analog sensor pod, the PIC12F635 delivers digital calibration, remote firmware update via ICSP, and signed telemetry at minimal incremental cost - key features for Industry 4.0 retrofits.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для PIC12F635T-I/MD — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | PIC12F635-I/MD | PIC12F635T-I/MF | PIC12F636-I/MD | PIC12F609-I/MD | PIC12F615-I/MD |
|---|---|---|---|---|---|---|
| Package | DFN-8 (3x3 mm) | DFN-8 (3x3 mm) - same | DFN-8 (6x5 mm) - same family, larger | DFN-8 (3x3 mm) - same | DFN-8 (3x3 mm) - same | DFN-8 (3x3 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 1.75 KB Flash | 1.75 KB Flash | 1.75 KB Flash | 2 KB Flash | 1 KB Flash | 1.75 KB Flash |
| EEPROM Size | 128 bytes | 128 bytes | 128 bytes | 256 bytes | 0 bytes | 0 bytes |
| KEELOQ Hardware Decoder | Yes | Yes | Yes | Yes | No | No |
| ADC | No (comparator only) | No (comparator only) | No (comparator only) | No (comparator only) | No (comparator only) | 10-bit ADC |
| Maximum Clock Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Supply Voltage | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
Ключевые отличия
- Integrated KEELOQ hardware decoder and AES engine (против PIC12F609-I/MD)
- EEPROM-equipped for parameter storage (против PIC12F615-I/MD)
- Comparator-based analog front end without external op-amp (против PIC10F320-E/MC)
Заметки по проектированию
Place a 100 nF decoupling capacitor as close as possible to the VDD pin (pin 1) and a bulk 1 uF or 10 uF capacitor on the same power rail to suppress VDD glitches when the internal oscillator switches banks. The PIC12F635's brown-out detect (BOD) must be enabled in configuration words for safety-critical applications to avoid corruption during supply brown-out; set the BOD threshold to 2.0 V minimum to ensure full Flash read/write integrity across the entire supply range.
When laying out the 8-pin DFN (3 x 3 mm) package, route the ICSPDAT/ICSPCLK pair on adjacent layers to keep programming-trace lengths symmetric and short (<25 mm). The exposed thermal pad (EP) on pin 8 / VSS must be soldered to a continuous ground pour that is stitched with multiple vias to the inner ground plane for thermal dissipation - on battery applications, this also lowers the impedance of the VSS return path. Avoid routing RF or analog signal traces under the ICSP lines to minimize crosstalk into the comparator inputs.
A common pitfall when migrating PIC12F635 firmware between DFN and DIP packages is forgetting that the MCLR pin (pin 4) is enabled by default; if the application does not need an external reset, configure MCLR as an internal-only reset (CONFIG_MCLRE_OFF) and use GP3 as GPIO, otherwise the pin remains an input with weak pull-up. Another frequent mistake is leaving the LVP (low-voltage programming) bit enabled in production code - this converts the PGM pin into a programming input and can cause unexpected behavior if the pin floats. Set LVP off for production firmware to free the pin for GPIO or peripheral use.
Информация о соответствии
RoHS compliant and lead-free per Microchip product page; halogen-free status not explicitly stated in verified web data. Not AEC-Q100 qualified (industrial grade only).
