DSPIC33EP128MU202-I/SO - 70MIPS 128KB DSC, USB | Microchip
料号： DSPIC33EP128MU202-I/SO ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $6.42 | $6.42 |
| 10 | $5.78 | $57.80 |
| 100 | $5.15 | $515.00 |
| 500 | $4.72 | $2,360.00 |
| 1,000 | $4.31 | $4,310.00 |
DSPIC33EP128MU202-I/SO 概述
A digital signal controller is a hybrid device that merges the computational horsepower of a digital signal processor (MAC operations, DSP instructions, circular addressing) with the peripheral integration and ease of use of a microcontroller. In the power-management hierarchy, DSCs sit above general-purpose MCUs and below multi-core DSPs, making them the preferred choice for closed-loop control systems that need real-time math and rich peripherals on a single chip.
Key features include the 70 MIPS dsPIC33E core with single-cycle MAC and 40-bit accumulator, 128 KB Flash with self-programming capability, 16 KB RAM, a 12-bit 1.1 Msps ADC with up to 10 input channels, and the USB 2.0 full-speed module that eliminates an external USB interface chip. Multiple UART, SPI, and I2C peripherals plus flexible peripheral pin select (PPS) allow digital remapping of I/O, simplifying PCB routing.
The dsPIC33EP architecture uses an enhanced Harvard bus structure with separate program and data paths, hardware loop support, and dual operand fetch for efficient FIR/IIR filtering. The 12-bit ADC can be synchronized to PWM modules via triggers, enabling precise current-sense sampling in digital power and motor control loops. Programmable PLL from the internal FRC or external crystal yields flexible clocking up to 70 MIPS.
Typical applications include USB-connected sensor hubs, battery charging and digital power supplies, BLDC/PMSM motor control, and portable instrumentation. The integrated USB makes it especially attractive for devices that must communicate with PCs without a separate USB bridge.
Design consideration: the dsPIC33E core requires a VCAP/VDDCORE capacitor (typically a low-ESR 10 uF) for the internal 2.5V regulator - omitting it or using an unstable capacitor is a common cause of boot failures.
This page synthesizes distributor pricing, drop-in same-family alternatives, pinout data, and practical design notes not consolidated in the manufacturer datasheet.
直接替换替代料： DSPIC33EP128MU202-I/SO ——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： DSPIC33EP128MU202-I/SO （相同外形与封装尺寸） ——差异在于 Package, Operating Temperature, Core, Program Memory (Flash), RoHS Status.
快速对比工具——选择替代料号进行并排对比：
DSPIC33EP128GP502-H/SO
✅ 直接替换✓ 有现货
$3.36 / 个
查看数据手册 →DSPIC33EP256MU202-I/SO
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
DSPIC33EP64MU202-I/SO
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
DSPIC33EP32MU202-I/SO
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
DSPIC33EP128MC202-I/MM
✅ 直接替换✓ 有现货
$4.9 / 个
查看数据手册 →DSPIC33EP128MU202-I/SO 最大额定值与电气特性
| Core | dsPIC33E 16-bit DSC |
| Max CPU Speed | 70 MIPS |
| Program Memory (Flash) | 128 KB |
| RAM | 16 KB |
| ADC Resolution | 12 bit |
| ADC Sampling Rate | 1.1 Msps |
| USB | USB 2.0 Full-Speed device/OTG |
| Communication Interfaces | USB, UART, SPI, I2C |
| Operating Voltage | 3.0 V to 3.6 V |
| 工作温度 | -40C to +85C |
| 封装 | SOIC-28 |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
DSPIC33EP128MU202-I/SO 引脚配置
| 引脚 1 | MCLR — Master clear reset (active low), programming voltage input |
| 引脚 2 | AN0/CN2/RB0 — Analog input 0 / change notification / port B bit 0 |
| 引脚 3 | AN1/CN3/RB1 — Analog input 1 / change notification / port B bit 1 |
| 引脚 4 | AN2/SS1/CN4/RB2 — Analog input 2 / SPI slave select / port B bit 2 |
| 引脚 5 | AN3/CN5/RB3 — Analog input 3 / port B bit 3 |
| 引脚 6 | VSS — Ground reference |
| 引脚 7 | OSC1/CLKI — Crystal oscillator input / external clock input |
| 引脚 8 | OSC2/CLKO — Crystal oscillator output / clock output |
| 引脚 9 | AN4/RB4 — Analog input 4 / port B bit 4 |
| 引脚 10 | AN5/RB5 — Analog input 5 / port B bit 5 |
| 引脚 11 | PGD/AN6/RB6 — Programming data / analog input 6 / port B bit 6 |
| 引脚 12 | PGC/AN7/RB7 — Programming clock / analog input 7 / port B bit 7 |
| 引脚 13 | VDD — Power supply (3.0 V to 3.6 V) |
| 引脚 14 | AN8/RB8 — Analog input 8 / port B bit 8 |
| 引脚 15 | AN9/RB9 — Analog input 9 / port B bit 9 |
| 引脚 16 | AN10/RB10 — Analog input 10 / port B bit 10 |
| 引脚 17 | AN11/RB11 — Analog input 11 / port B bit 11 |
| 引脚 18 | AN12/RB12 — Analog input 12 / port B bit 12 |
| 引脚 19 | AN13/RB13 — Analog input 13 / port B bit 13 |
| 引脚 20 | AN14/RB14 — Analog input 14 / port B bit 14 |
| 引脚 21 | AN15/RB15 — Analog input 15 / port B bit 15 |
| 引脚 22 | VSS — Ground reference |
| 引脚 23 | U1D-/RP — USB data minus (peripheral pin select capable pin) |
| 引脚 24 | U1D+/RP — USB data plus (peripheral pin select capable pin) |
| 引脚 25 | RP20/SDA1 — Remappable pin / I2C data 1 |
| 引脚 26 | RP21/SCL1 — Remappable pin / I2C clock 1 |
| 引脚 27 | VCAP/VDDCORE — Internal core regulator capacitor connection |
| 引脚 28 | AVDD/AVSS region via VDD — See datasheet - analog power/ground and remaining remappable pins |
典型应用
DSPIC33EP128MU202-I/SO 适用于 6 应用s: USB-Connected Sensor Hubs, BLDC / PMSM Motor Control, Digital Power Supplies (AC-DC / DC-DC), Battery Charging Systems, Portable Instrumentation, Industrial Automation Nodes.
USB-Connected Sensor Hubs
The integrated USB 2.0 full-speed module of the DSPIC33EP128MU202-I/SO eliminates an external USB bridge chip, allowing sensors to stream data directly to a PC host over CDC or HID classes. The 70 MIPS core performs filtering (FIR/IIR with single-cycle MAC) on sensor data before transmission, reducing host-side processing. The 12-bit 1.1 Msps ADC digitizes analog sensor outputs, while DMA offloads USB endpoint buffer management from the CPU. With 128 KB Flash, complex USB stacks plus application code fit comfortably. Place the device within 2.54 cm of the USB connector with series termination on D+/D- to maintain signal integrity at full-speed 12 Mbps rates.
推荐
BLDC / PMSM Motor Control
The 70 MIPS dsPIC33E core with hardware DSP MAC executes field-oriented control (FOC) loops well beyond the 10-20 kHz PWM frequencies typical of brushless motor drives. The 12-bit ADC samples phase currents triggered by PWM events for minimum offset error, and PWM modules generate center-aligned complementary outputs with dead-time insertion. According to Microchip, the dsPIC33E family enables high-performance, precision, energy-efficient, and quieter motor control for BLDC and permanent-magnet motors. The 28-pin SOIC fits compact driver boards; allocate two PWM outputs per phase and reserve an ADC channel for the bus-voltage sense divider.
推荐
Digital Power Supplies (AC-DC / DC-DC)
Digital power loops benefit from the deterministic 70 MIPS core, PWM-triggered ADC sampling, and software-defined compensation of the DSPIC33EP128MU202-I/SO. The controller implements voltage-mode or average-current-mode control in software, allowing adaptive tuning across load ranges that fixed analog compensators cannot match. The 1.1 Msps ADC captures transient events at microsecond resolution, and the internal 2.5V core regulator simplifies the 3.3 V supply tree. Reserve the UART or I2C peripheral for PMBus-style telemetry to a host. Keep the analog ground plane for ADC inputs separate from PWM switching grounds to preserve the 12-bit noise floor.
推荐
Battery Charging Systems
Smart battery chargers need closed-loop current/voltage control plus host reporting - exactly the combination the DSPIC33EP128MU202-I/SO provides with its 12-bit ADC, PWM-based power stage control, and USB port for PC configuration tools. The 70 MIPS core runs multi-phase charging state machines and coulomb-counting math concurrently, while 16 KB RAM buffers charge-profile logs. The 128 KB Flash stores multiple chemistry profiles (Li-ion, lead-acid, NiMH) selectable at runtime. The -40C to +85C industrial temperature grade supports outdoor EVSE accessories and solar charge controllers; apply conformal coating and derate maximum junction by 20C in sealed enclosures.
推荐
Portable Instrumentation
Handheld meters and data loggers exploit the 1.1 Msps 12-bit ADC for waveform capture, USB for data upload, and the low-power idle modes of the dsPIC33E core for battery conservation. The 70 MIPS throughput executes true-RMS, FFT, and windowing math on-device, displaying results on low-cost displays via SPI or I2C. The 28-pin SOIC keeps PCB area small enough for pocket-form-factor designs, and the 128 KB Flash retains calibration tables and logging firmware. Trigger the ADC synchronously with a timer for coherent sampling; the peripheral pin select lets routing place the display bus away from the analog front end to protect measurement accuracy.
推荐
Industrial Automation Nodes
In factory nodes, the DSPIC33EP128MU202-I/SO serves as an intelligent actuator or sensor controller: its UART/SPI/I2C peripherals interface PLC I/O, the 12-bit ADC reads 4-20 mA loops via a sense resistor, and the industrial -40C to +85C rating survives panel environments. The 70 MIPS DSP engine handles vibration-signature or power-quality analytics locally, escalating only exceptions over USB or serial links to supervisory systems. The 128 KB Flash supports field firmware updates, and peripheral pin select remaps pins so one PCB serves multiple product variants. Enforce watchdog supervision and CRC-checked firmware images for environments where unattended recovery is impossible.
推荐
推荐产品汇总
工程参考数据： DSPIC33EP128MU202-I/SO ——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 | DSPIC33EP128GP502-H/SO | DSPIC33EP256MU202-I/SO | DSPIC33EP64MU202-I/SO | DSPIC33EP32MU202-I/SO | DSPIC33EP128MC202-I/MM |
|---|---|---|---|---|---|---|
| Package | SOIC-28 | SOIC-28 - same | SOIC-28 - same | SOIC-28 - same | SOIC-28 - same | QFN-28 - different land pattern |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 128 KB | 128 KB | 256 KB | 64 KB | 32 KB | 128 KB |
| RAM | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| Core Speed | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS |
| USB 2.0 Peripheral | Yes (full-speed) | No | Yes (full-speed) | Yes (full-speed) | Yes (full-speed) | No |
关键差异点
- Integrated USB 2.0 full-speed device/OTG （对比 DSPIC33EP128GP502-H/SO)
- 128 KB Flash headroom for USB stacks + application （对比 DSPIC33EP64MU202-I/SO)
- Surface-mount SOIC-28 footprint （对比 DSPIC33EP128MU202-I/SP)
设计说明
The dsPIC33E internal regulator requires a low-ESR ceramic capacitor (typically 10 uF) on the VCAP/VDDCORE pin; check the datasheet ESR window because out-of-range ESR destabilizes the 2.5V core supply and is a leading cause of no-boot returns. Decouple each VDD pin with 0.1 uF ceramics placed within 3 mm of the pin plus one bulk 4.7-10 uF capacitor per device. AVDD should be filtered through an RC (e.g., 10 ohm + 1 uF) from the digital rail for best ADC noise performance.
For the USB 2.0 full-speed interface, route D+ and D- as a 90-ohm differential pair matched to within 1-2 mm, keep total length under 20 cm, and avoid routing under switching loads or crystals. Place a common-mode choke and ESD array at the connector if the cable is user-accessible. Use the internal PLL from an external crystal rather than the internal FRC oscillator when USB accuracy class compliance matters, since full-speed USB needs a precise 48 MHz source.
Config-word settings (OSC, WDT, code protection) are stored in Flash and are erased during full-chip erase - always set them in source code, not only via the programmer GUI, or production units may boot from the wrong oscillator. Keep MCLR pulled up through a 10k resistor for field reliability, and remember PPS (peripheral pin select) must be explicitly unlocked/locked (with a sequence) when remapping RP pins; forgetting to lock leaves mappings vulnerable to stray writes.
Estimated: at 70 MIPS with all peripherals active, core current is on the order of tens of mA at 3.3 V, giving power dissipation of roughly 100-200 mW - the SOIC-28 theta_JA of approximately 70-100 C/W yields only a 7-20 C junction rise at 25C ambient, so heatsinking is unnecessary. Verify against the datasheet current-consumption tables for your actual clock and peripheral configuration.
合规信息
RoHS compliance per standard Microchip commercial-grade offering; REACH and conflict-mineral declarations were not present in the provided data.
