PIC18F27Q43T-I/STX - 64MHz 128KB Flash 8-bit MCU | Microchip
料号： PIC18F27Q43T-I/STX ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.1 | $3.10 |
| 10 | $2.79 | $27.90 |
| 100 | $2.49 | $249.00 |
| 500 | $2.22 | $1,110.00 |
| 1,000 | $1.98 | $1,980.00 |
PIC18F27Q43T-I/STX 概述
An 8-bit PIC microcontroller is a Harvard-architecture CMOS device that executes one byte-wide instruction per cycle from on-chip Flash, with peripherals and interrupt logic integrated onto the same die. PIC18 sits inside Microchip's mid-range 8-bit family, above the PIC16 baseline and below PIC24/dsPIC 16-bit parts, and is widely used where deterministic behavior, low power, and rich analog integration matter more than raw CPU throughput. Functional-safety (FuSa) documentation is available to assist IEC 61508 SIL-2 capable designs, which positions the Q43 family for safety-critical sensor and control subsystems.
Key features include up to 64MHz CPU speed (16 MIPS), 128KB self-programmable Flash program memory with device information area (DIA) and unique ID, 8KB SRAM, 1KB EEPROM, a 12-bit differential ADC2 with oversampling and accumulators, an 8-bit DAC, multiple zero-cross detect op-amps, comparators, 16-bit PWM with complementary outputs, UART/SPI/I2C, and rich DMA-style peripheral triggers. The 28-VQFN-EP (4x4 mm) package gives a compact footprint with an exposed thermal pad for heat spreading.
The device uses Microchip's enhanced PIC18 RISC core with a 16-bit instruction word and 31-level hardware stack. The peripheral interconnect fabric allows peripherals to be chained without CPU intervention, lowering interrupt latency and active-mode energy. The 12-bit ADC2 with averaging, accumulation and threshold compare simplifies firmware sensor conditioning, while the flexible PWM and CWG let designers generate sophisticated motor and lighting waveforms.
Typical applications include industrial sensor nodes, IoT edge controllers, functional-safety subsystems, motor and lighting control, battery-powered metering and CryptoSecure-enabled appliance controllers. The wide operating voltage and eXtreme Low Power (XLP) sleep modes suit battery and energy-harvesting designs, while on-chip CAN-FD-friendly peripherals make it viable for automotive body and appliance controllers.
When designing, ensure the exposed pad on the VQFN-28 is soldered to a sufficient ground copper pour for thermal and electrical performance. MPLAB X IDE with MPLAB Code Configurator (MCC) and the XC8 compiler are the recommended toolchain, and the PIC18F27Q43T-I/STX is pin-compatible with other 28-pin PIC18FxxQ43 variants.
直接替换替代料： PIC18F27Q43T-I/STX ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC18F27Q43T-I/STX （相同外形与封装尺寸） ——差异在于 ADC, DAC, Operating Temperature, Package, Program Memory (Flash).
快速对比工具——选择替代料号进行并排对比：
PIC18F25Q43-I/STX
✅ 直接替换✓ 有现货
$1.55 / 个
查看数据手册 →PIC18F47Q43-I/STX
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
PIC18F27Q43T-I/STX 最大额定值与电气特性
| Core Architecture | 8-bit PIC18 enhanced RISC, 16-bit instruction word |
| Program Memory (Flash) | 128 KB |
| Data SRAM | 8 KB |
| EEPROM | 1 KB |
| Maximum CPU Clock | 64 MHz (16 MIPS) |
| ADC | 12-bit differential ADC2 with computation, oversampling and accumulators |
| DAC | 8-bit DAC |
| Comparators | On-chip (per datasheet) |
| Op-Amps | On-chip configurable op-amps (per datasheet) |
| PWM | 16-bit PWM with complementary outputs |
| Communication Interfaces | UART, SPI, I2C (per Q43 family datasheet) |
| Core Independent Peripherals | Yes - CLC, CWG, NCO, DSM (per Q43 family) |
| Functional Safety | FuSa documentation package - IEC 61508 SIL-2 capable (per Microchip) |
| Low-Power Technology | eXtreme Low Power (XLP) |
| 封装 | 28-pin VQFN-EP (4x4 mm) with exposed thermal pad |
| 工作温度 | -40 C to +85 C (industrial, 'I' suffix) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant (per Verified Electronics listing) |
PIC18F27Q43T-I/STX 引脚配置
| 引脚 1 | RA2 — Bidirectional I/O / analog input (per Q43 datasheet) |
| 引脚 2 | RA3 — Bidirectional I/O / analog input |
| 引脚 3 | RA4 — Bidirectional I/O (also ADC or reference) |
| 引脚 4 | RA5 — Bidirectional I/O / analog input |
| 引脚 5 | RA6 — Bidirectional I/O / oscillator |
| 引脚 6 | RA7 — Bidirectional I/O / oscillator |
| 引脚 7 | VDD — Positive supply voltage |
| 引脚 8 | VSS — Ground |
| 引脚 9 | RB0 — Bidirectional I/O - interrupt-on-change |
| 引脚 10 | RB1 — Bidirectional I/O - interrupt-on-change |
| 引脚 11 | RB2 — Bidirectional I/O - interrupt-on-change |
| 引脚 12 | RB3 — Bidirectional I/O - interrupt-on-change |
| 引脚 13 | RB4 — Bidirectional I/O - interrupt-on-change |
| 引脚 14 | RB5 — Bidirectional I/O - interrupt-on-change / PGEC |
| 引脚 15 | RB6 — Bidirectional I/O - interrupt-on-change / PGEC2 |
| 引脚 16 | RB7 — Bidirectional I/O - interrupt-on-change / PGED2 |
| 引脚 17 | RC0 — Bidirectional I/O |
| 引脚 18 | RC1 — Bidirectional I/O |
| 引脚 19 | RC2 — Bidirectional I/O |
| 引脚 20 | RC3 — Bidirectional I/O |
| 引脚 21 | RC4 — Bidirectional I/O |
| 引脚 22 | RC5 — Bidirectional I/O |
| 引脚 23 | RC6 — Bidirectional I/O |
| 引脚 24 | RC7 — Bidirectional I/O |
| 引脚 25 | RA0 — Bidirectional I/O / analog input |
| 引脚 26 | RA1 — Bidirectional I/O / analog input |
| 引脚 27 | MCLR — Master Clear (reset) input |
| 引脚 28 | AVSS — Analog ground (per Q43 datasheet) |
典型应用
PIC18F27Q43T-I/STX 适用于 7 应用s: Industrial Sensor Node, IoT Edge Controller, Functional-Safety Subsystem, Motor and Lighting Control, Battery-Powered Metering, Automotive Body and Appliance Controller, Appliance User Interface with HMI.
Industrial Sensor Node
The PIC18F27Q43T-I/STX suits industrial sensor nodes with 128 KB Flash for Modbus/IO-Link stacks, 8 KB SRAM for ring buffers, and the 12-bit ADC2 with computation for direct thermistor, strain-gauge, and 4-20 mA front-end conditioning. Its DMA-style peripheral triggers let the ADC2 accumulate and threshold-compare in hardware, so the core can remain in XLP sleep until a threshold event wakes it. Functional-safety (FuSa) IEC 61508 documentation helps designers meet SIL-2 capable factory sensor certifications.
推荐
IoT Edge Controller
The PIC18F27Q43T-I/STX fits low-power IoT edge controllers with 64 MHz throughput for TLS handshake offload and on-chip peripherals that operate while the core sleeps in XLP nanoWatt mode. The 128 KB Flash supports an embedded TLS library and OTA bootloader, while 8 KB SRAM holds MQTT buffers. The CLC (Configurable Logic Cell) fabric can implement hardware crypto glue and wake-on-edge triggers, reducing active-mode energy per event by orders of magnitude.
推荐
Functional-Safety Subsystem
The PIC18F27Q43T-I/STX is well-matched to functional-safety subsystems because Microchip supplies IEC 61508 SIL-2 capable documentation, FMEDA, diagnostic libraries and a safety manual. The 12-bit ADC2 with computation enables built-in diagnostics on analog inputs, and the comparator with windowed DAC supports hardware sanity checks. The 31-level hardware stack and deterministic PIC18 core provide predictable interrupt latency essential for safety integrity measurement.
推荐
Motor and Lighting Control
The PIC18F27Q43T-I/STX drives motor and lighting control with its 16-bit PWM (4 channels typical for Q43), Complementary Waveform Generator (CWG) for dead-band control, and zero-cross-detect op-amps for TRIAC synchronization. At 64 MHz / 16 MIPS the core easily handles FOC loops in firmware while CIPs offload PWM generation. The 28-VQFN-EP 4x4 mm footprint fits compact BLDC fan, LED driver, and appliance-control PCBs.
推荐
Battery-Powered Metering
The PIC18F27Q43T-I/STX is suitable for battery-powered metering thanks to eXtreme Low Power (XLP) sleep current in the nanoWatt range and a wide operating voltage range that allows direct 2xAA / 1xLi-ion input. The 12-bit ADC2 with accumulation averages battery current over hundreds of cycles for coulomb-counting accuracy below 1 percent. The 1 KB EEPROM stores calibration constants and tamper flags without external NVMs.
推荐
Automotive Body and Appliance Controller
The PIC18F27Q43T-I/STX serves automotive body and appliance controllers thanks to its CAN-FD-friendly peripherals, robust ESD/EMC on I/O, and Automotive-grade siblings in the same Q43 family. Functional-safety IEC 61508 documentation also helps Tier-1 suppliers seeking similar architectures in non-automotive safety markets. Note: this exact part is industrial-grade; for AEC-Q100 qualified devices, choose the automotive PIC18F27Q43-I/STX with a /VAO or automotive suffix.
推荐
Appliance User Interface with HMI
The PIC18F27Q43T-I/STX supports appliance user interfaces with its 12-bit ADC2 reading multiple capacitive-touch buttons, an 8-bit DAC controlling buzzer volume, and 16-bit PWM dimming LED indicators. The peripheral interconnect fabric chains ADC, comparator and CWG for off-CPU HMI timing, while 128 KB Flash holds graphics strings and the menu state machine. The 4x4 mm VQFN leaves room on the PCB for the touch sensor pattern.
推荐
推荐产品汇总
工程参考数据： PIC18F27Q43T-I/STX ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PIC18F25Q43-I/STX | PIC18F47Q43-I/STX (same family, larger Flash) | PIC18F27Q43T-I/SS (T&R of SSOP variant, not VQFN) |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-VQFN-EP (4x4) | 28-VQFN-EP (4x4) - same | 40/44/48-pin Q43 family only - verify pinout | 28-SSOP - not VQFN |
| Flash Memory | 128 KB | 64 KB | 128 KB (different pin count) | 128 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB |
| Maximum CPU Clock | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| ADC | 12-bit ADC2 with computation | 12-bit ADC2 with computation | 12-bit ADC2 with computation | 12-bit ADC2 with computation |
| Functional Safety (FuSa) | Yes (IEC 61508 SIL-2 capable) | Yes (IEC 61508 SIL-2 capable) | Yes (IEC 61508 SIL-2 capable) | Yes (IEC 61508 SIL-2 capable) |
| Package Match | 28-VQFN-EP (4x4) | true (same VQFN-EP) | false (40/44/48-pin packages only) | false (SSOP, not VQFN) |
关键差异点
- Only 28-VQFN-EP Q43 variant with tape-and-reel packing and 128 KB Flash （对比 PIC18F25Q43-I/STX)
- Functional-safety IEC 61508 SIL-2 documentation on a 28-pin footprint （对比 PIC18F27K42-I/SS)
- Compact 4x4 mm VQFN with exposed pad for thermal spread （对比 PIC18F27Q43T-I/SS (T&R of SSOP variant, not VQFN))
设计说明
The PIC18F27Q43T-I/STX in the 28-VQFN-EP 4x4 mm package dissipates modest power because the PIC18 core runs at low uA/MHz, but the exposed pad (EP) must be soldered to a ground copper pour of at least 25 mm squared to keep theta_JA low. Under-estimation of the EP connection is a common PCB-layout defect on QFN microcontrollers and leads to thermal accumulation during sustained EEPROM writes. Estimated: assume theta_JA ~ 40-60 C/W (per Q43 family thermal guidance) and confirm with a hot-IC spot test in your enclosure.
Place a 100 nF decoupling capacitor within 2 mm of the VDD pin (pin 7) and a bulk 1 uF + 100 nF pair within 5 mm. Route the MCLR line (pin 27) with a short trace and add a 10 kohm pull-up to VDD plus a 100 nF to ground for in-circuit programming noise immunity. Avoid running noisy switching traces under the exposed pad; doing so couples ground bounce into the analog reference. For analog measurements with the 12-bit ADC2, dedicate a quiet AVSS trace and a ferrite bead between digital and analog VDD.
Do not confuse the PIC18F27Q43T-I/STX (28-VQFN) with the PIC18F27K42-I/SS (28-SSOP) - the footprints are not PCB-compatible even though both share a '28-pin PIC18' identity. Another common mistake is omitting configuration words: the PIC18F27Q43 uses configuration bits such as WDT, BOR, and LVP that must be set in source code or MCC before code runs after a MCLR. Estimated: verification of programming range 3.0V-5.5V via the PICkit 4 'Read Device ID' command is the fastest sanity check for new boards.
When using the PIC18F27Q43T-I/STX's analog peripherals, route the AVSS pin to a ground island with a single point connection to digital ground to avoid ground-loop coupling from the I/O switching. The 12-bit ADC2 with computation is sensitive to high-frequency noise on the analog input, so place the input RC filter within 5 mm of the pin and use 0.1 percent or better resistor tolerance where measurement accuracy under 1 LSB matters.
合规信息
RoHS and lead-free per Microchip product page (Verified Electronics listing). Industrial temperature grade -40C to +85C only; not AEC-Q100 automotive qualified.
