DSPIC33EP128MU502-I/SP - 70MIPS 16-bit USB DSC | Microchip
MPN： DSPIC33EP128MU502-I/SP ✓ 啟用中DSPIC33EP128MU502-I/SP 概覽
A digital signal controller combines the computational capability of a DSP with the peripheral set and ease of use of a microcontroller. Within the power-management hierarchy, DSCs occupy the space between general-purpose MCUs and dedicated DSPs, making them the device of choice for control loops that need both fast math (MAC instructions, DSP engine) and flexible digital and analog peripherals.
Key features of this part include the dsPIC33E 16-bit core running at up to 70 MIPS, 128 KB of self-programmable Flash, 16 KB of on-chip RAM, and full-speed USB 2.0 On-The-Go (OTG) capability, which distinguishes the MU sub-family from the GP and MC variants. A 12-bit ADC with multiple sample-and-hold circuits supports simultaneous sampling for high-precision control applications.
Architecturally, the dsPIC33EP core pairs two 40-bit wide accumulators and a hardware DSP engine (17x17 MAC, dual operand fetch) with deterministic interrupt latency, allowing filter and control algorithms to execute in fixed cycle counts. In-Circuit Serial Programming (ICSP) and in-circuit debugging are supported through the MPLAB SNAP or PICkit programmers using just two device I/O pins.
Typical applications include USB-connected industrial instruments, digital power supplies and PFC converters, brushless DC motor control, and general embedded systems that benefit from DSP-class math in a DIP package that is easy to prototype and socket.
Design consideration: the dsPIC33EP core requires a VDDCORE/VCAP stabilization capacitor on pin 11; do not omit it, and sequence 3.3V supply within the 3.0V to 3.6V operating range.
This page synthesizes distributor inventory data, drop-in alternatives, pricing tiers, and practical design notes beyond what the manufacturer datasheet provides.
直接替換替代品，適用於 DSPIC33EP128MU502-I/SP — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： DSPIC33EP128MU502-I/SP （相同外形與佔位） — 差異在於 Package, Core, Mounting Type, ADC Resolution, Operating Temperature.
DSPIC33EP128MU502-E/SP
✅ 直接替換聯絡詢價
查看資料表 →DSPIC33EP128MU502-H/SP
✅ 直接替換聯絡詢價
查看資料表 →DSPIC33EP128GP502-I/SP
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
DSPIC33EP128MC502-I/SP
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →DSPIC33EP128MU502-I/SP 最大額定值與電氣特性
| Core | dsPIC33E 16-bit DSC |
| CPU Speed | 70 MIPS |
| Program Memory (Flash) | 128 KB |
| RAM | 16 KB |
| 供應電壓 | 3.0 V to 3.6 V |
| 工作溫度 | -40C to +85C (I grade) |
| 封裝 | 28-pin SPDIP (SP) |
| ADC Resolution | 12-bit |
| USB | USB 2.0 OTG, full speed |
| Programming Interface | ICSP (2-wire), in-circuit debug |
| 安裝類型 | Through Hole |
| Packaging | Tube |
DSPIC33EP128MU502-I/SP 腳位配置
| 腳位 1 | MCLR — Master clear reset / ICSP programming voltage input |
| 腳位 2 | AN0/RB0/PGED1 — Analog input 0 / Port B / primary debug data |
| 腳位 3 | AN1/RB1/PGEC1 — Analog input 1 / Port B / primary debug clock |
| 腳位 4 | AN2/RB2 — Analog input 2 / Port B |
| 腳位 5 | AN3/RB3 — Analog input 3 / Port B |
| 腳位 6 | AN4/RB4 — Analog input 4 / Port B |
| 腳位 7 | VDD — Positive supply, 3.0 V to 3.6 V |
| 腳位 8 | VSS — Ground reference |
| 腳位 9 | OSC1/CLKI/RA2 — Oscillator crystal input / external clock input |
| 腳位 10 | OSC2/CLKO/RA3 — Oscillator crystal output / clock output |
| 腳位 11 | VCAP/VDDCORE — Internal core regulator stabilization capacitor (connect low-ESR capacitor to VSS) |
| 腳位 12 | RA4/RP4 — Port A / remappable peripheral pin |
| 腳位 13 | RA5/RP5 — Port A / remappable peripheral pin |
| 腳位 14 | VSS — Ground reference |
| 腳位 15 | RB5/RP6/SOSCI — Port B / remappable pin / secondary oscillator input |
| 腳位 16 | RB6/RP7/SOSCO — Port B / remappable pin / secondary oscillator output |
| 腳位 17 | RB7/RP8 — Port B / remappable peripheral pin |
| 腳位 18 | RB8/RP9 — Port B / remappable peripheral pin |
| 腳位 19 | RB9/RP10 — Port B / remappable peripheral pin |
| 腳位 20 | RB10/RP11 — Port B / remappable peripheral pin |
| 腳位 21 | RB11/RP12 — Port B / remappable peripheral pin |
| 腳位 22 | RB12/RP13/PGD2 — Port B / remappable pin / secondary debug data |
| 腳位 23 | RB13/RP14/PGC2 — Port B / remappable pin / secondary debug clock |
| 腳位 24 | VDD — Positive supply, 3.0 V to 3.6 V |
| 腳位 25 | RB14/RP15/PGD1 — Port B / remappable pin / primary ICSP data |
| 腳位 26 | RB15/RP16/PGC1 — Port B / remappable pin / primary ICSP clock |
| 腳位 27 | AVSS — Analog ground reference |
| 腳位 28 | AVDD — Analog positive supply |
典型應用
DSPIC33EP128MU502-I/SP 適用於 6 應用s: USB-Connected Industrial Instruments, Digital Power Supplies and PFC Converters, Brushless DC Motor Control, Embedded Audio and Signal Processing, Sensor Data Loggers and IoT Edge Nodes, Prototyping and Educational Systems.
USB-Connected Industrial Instruments
The DSPIC33EP128MU502-I/SP fits USB-connected instruments because it is one of the few DSCs combining full-speed USB 2.0 OTG with a 70 MIPS DSP engine in a through-hole package. Placed as the main controller, its USB OTG peripheral handles device/host roles for data logging and firmware field updates, while the hardware MAC accelerator executes FFT filtering on 12-bit ADC samples. The 128 KB Flash supports protocol stacks plus application code with headroom. Trade-off: the 3.0V to 3.6V supply requires a 3.3V regulator ahead of the part, and the VDDCORE capacitor is mandatory for stable core regulation.
推薦
Digital Power Supplies and PFC Converters
Digital power and PFC designs benefit from the MU502's deterministic 70 MIPS core and dual 40-bit accumulators, which execute voltage/current control loops at fixed cycle counts. The 12-bit ADC with multiple sample-and-hold circuits can sample input and output rails in the same cycle, critical for feed-forward compensation. PWM peripherals generate the switching waveforms while the DSP engine runs the compensator. Because switching converters inject noise, keep analog grounds separate per the datasheet AVSS/AVDD guidance. The 128 KB Flash accommodates compensation tables, soft-start ramps, and fault-logging code without external memory.
推薦
Brushless DC Motor Control
The MU502 supports BLDC control with its fast core, 12-bit ADC, and PWM generation, executing trapezoidal or FOC commutation loops in software at 70 MIPS. Sensorless back-EMF detection uses the ADC with hardware sample triggers synchronized to PWM events. The hardware 17x17 MAC accelerates Clarke/Park transforms. Note the trade-off: the dedicated motor-control sub-family (DSPIC33EP128MC502) provides complementary PWM outputs and fault inputs, so for high-current drives prefer the MC variant; the MU502 is best where motor control is combined with USB reporting or host connectivity in one chip.
推薦
Embedded Audio and Signal Processing
The DSP engine - 17x17 hardware multiplier, dual 40-bit accumulators, and modulo addressing - makes the MU502 effective for embedded audio filtering, AGC, and spectral analysis. The 12-bit ADC digitizes microphone or line-level signals after external anti-alias filtering, while processed output streams over USB OTG to a host or over SPI/I2C to a codec. Running filters at 70 MIPS leaves substantial cycle margin at typical 48 kHz sample rates. Budget RAM carefully: 16 KB limits buffer depths, so design filter block sizes around available X and Y data memory before committing to long convolution kernels.
推薦
Sensor Data Loggers and IoT Edge Nodes
As a data-logger controller, the MU502 pairs its 12-bit ADC with multiple sensor inputs and its USB OTG port for data offload and configuration, avoiding a separate USB bridge chip. The 128 KB Flash stores calibration tables and logging firmware; 16 KB RAM buffers sampled batches before transfer. The industrial -40C to +85C rating suits unconditioned environments. For battery-powered nodes, characterize the core regulator's VDDCORE capacitor leakage and consider the lower-power PIC16LF family for sleep-dominant designs - the dsPIC33EP targets compute-heavy, duty-cycled acquisition rather than nanoamp sleep budgets.
推薦
Prototyping and Educational Systems
The 28-pin SPDIP through-hole package makes the MU502 uniquely approachable for prototyping, breadboarding, and university labs - it sockets directly into 0.1-inch perforated boards without adapters. The full-speed USB OTG peripheral lets students build real HID or CDC devices, while the DSP engine teaches fixed-point signal processing on professional-grade hardware. Programming uses MPLAB SNAP or PICkit over two-wire ICSP with just MCLR, PGD, and PGC exposed. The industrial temperature grade means lab prototypes behave identically to production parts, and the -E extended-grade variant can be substituted without any design change when environmental testing is added.
推薦
推薦產品摘要
工程參考資料，適用於 DSPIC33EP128MU502-I/SP — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | DSPIC33EP128MU502-E/SP | DSPIC33EP128MU502-H/SP | DSPIC33EP128GP502-I/SP | DSPIC33EP128MC502-I/SP |
|---|---|---|---|---|---|
| Package | 28-pin SPDIP (SP) | 28-pin SPDIP (SP) - same | 28-pin SPDIP (SP) - same | 28-pin SPDIP (SP) - same | 28-pin SPDIP (SP) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / MIPS | dsPIC33E, 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS |
| Flash / RAM | 128 KB / 16 KB | 128 KB / 16 KB | 128 KB / 16 KB | 128 KB / 16 KB | 128 KB / 16 KB |
| USB OTG | Yes (full speed) | Yes (full speed) | Yes (full speed) | No | No |
| Operating Temperature | -40C to +85C | -40C to +125C | -40C to +150C | -40C to +85C | -40C to +85C |
| ADC Resolution | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit |
| Distinguishing Peripheral | USB 2.0 OTG | USB 2.0 OTG (same die) | USB 2.0 OTG (same die) | General-purpose peripherals | Motor-control PWM module |
主要差異化特點
- USB 2.0 OTG on-chip (對比DSPIC33EP128GP502-I/SP)
- Extended temperature drop-in options on the identical die (對比DSPIC33EP128MU502-E/SP)
- Through-hole SPDIP package for a 70 MIPS DSC (對比DSPIC33EP128MC502-I/SP (also available in SS/SO))
設計說明
The dsPIC33EP core includes an internal regulator; the VCAP/VDDCORE pin (pin 11 on SPDIP-28) must be tied to a low-ESR ceramic capacitor to ground. Omitting this capacitor or using a high-ESR part causes core-rail droop and intermittent brownout resets, especially at 70 MIPS where core current demand spikes. Keep the 3.3V main supply within 3.0V to 3.6V under all load transients and add 100 nF decoupling at both VDD pins (7, 24) plus AVDD (28).
Even in a through-hole design, keep the analog domain clean: route ADC input traces away from PWM and USB lines, and connect AVSS (pin 27) to a quiet star ground rather than sharing a long return path with switching loads. For socketed prototypes, note that DIP sockets add inductance that can degrade high-speed remappable pin (RPn) signal integrity; for USB full-speed operation, minimize stub length between the device and the connector.
Two frequent mistakes: (1) assuming the MU502's USB peripheral means a 5V-tolerant VBUS pin handling - the USB VBUS sensing must be implemented within the datasheet absolute maximum ratings, typically via a resistor divider on an ADC-capable pin; (2) mixing up -I, -E, and -H temperature suffixes during BOM entry - all three share the same footprint, so a wrong suffix passes DRC but can fail in the field at extreme temperatures. Verify the suffix on incoming parts and confirm RPn pin mappings in code against the current family datasheet before freezing layout.
合規資訊
Compliance details were not present in the provided web data. Confirm RoHS/REACH status on the official Microchip product page or datasheet before procurement.
