DSPIC33EP128GP502T-I/SO - 70MIPS 16-bit DSC | Microchip
MPN: DSPIC33EP128GP502T-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.2 | $5.20 |
| 10 | $4.7 | $47.00 |
| 100 | $4.25 | $425.00 |
| 500 | $3.9 | $1,950.00 |
| 1,000 | $3.55 | $3,550.00 |
DSPIC33EP128GP502T-I/SO Overview
A Digital Signal Controller combines the architectural strengths of a microcontroller (MCU) with the computational features of a digital signal processor (DSP). The dsPIC33E family sits within Microchip's broader 16-bit microcontroller and DSC hierarchy, offering the fastest 70 MIPS core in the portfolio together with DSP multiply-accumulate instructions, high code density, and advanced analog integration, making it a bridge between general-purpose MCUs and dedicated DSPs in embedded power management and control systems.
Key features include the 70 MIPS dsPIC33E core, CAN 2.0B communication, a Charge Time Measurement Unit (CTMU), Peripheral Trigger Generator (PTG), and multiple on-chip op amps and comparators. The enhanced high-speed PWM and superior ADC performance make it especially suitable for closed-loop digital power conversion and sensor-heavy control loops. IrDA, LINbus, I2C, and SPI serial interfaces round out connectivity options, and the device operates from a 3V to 3.6V supply.
Architecturally, the dsPIC33E core uses a modified Harvard pipeline with a 16-bit data path and 24-bit instruction width, supporting DSP-class MAC instructions alongside microcontroller peripherals. The GP (General Purpose) subfamily emphasizes broad peripheral coverage rather than motor-control-specific PWM features.
Typical applications include industrial automation nodes with CAN networking, digital power supplies and battery chargers, and general-purpose sensor interfaces leveraging the CTMU and integrated op amps.
Design consideration: at 70 MIPS ensure a stable 3.3V rail and proper decoupling on all VDD pins, and note that ICSP programming requires PGECx/PGEDx pairs to be used as matched pairs.
This page synthesizes distributor data, same-family drop-in alternatives, pinout, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for DSPIC33EP128GP502T-I/SO — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with DSPIC33EP128GP502T-I/SO (same form factor and footprint) — differing in Package, Core Architecture, Operating Temperature, ADC, CAN.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP256GP502-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.32 / Unit
View Datasheet →DSPIC33EP64GP502-I/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP32GP502-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.65 / Unit
View Datasheet →DSPIC33EP128GP502-H/SO
✅ Drop-In✓ In Stock
$3.36 / Unit
View Datasheet →DSPIC33EP64MC202-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$0.13 / Unit
View Datasheet →DSPIC33EP128GP502-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33EP128GP502T-I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33E DSC |
| Core Speed | 70 MIPS (60 MHz peripheral clock) |
| Flash Program Memory | 128KB (43K x 24) |
| RAM | 16KB |
| Operating Voltage | 3 V to 3.6 V |
| Package | 28-SOIC (0.295", 7.50mm width) |
| Pin Count | 28 |
| Mounting Type | Surface Mount |
| Connectivity | CANbus, I2C, SPI, IrDA, LINbus, UART |
| Peripherals | CTMU, PTG, Op Amps, Comparators, High-Speed PWM |
| Temperature Range | -40C to +85C (I grade) |
| Family | dsPIC33EP GP (General Purpose) |
| Programming/Debug | ICSP via PGECx/PGEDx pairs |
| Packaging Type | Tape & Reel (T suffix) |
| Standard Package Quantity | 1600 |
DSPIC33EP128GP502T-I/SO Pin Configuration
| Pin 1 | MCLR — Master clear reset, programming voltage input |
| Pin 2 | AN0/CN2/RB0 — Analog input 0 / change notification / port B |
| Pin 3 | AN1/CN3/RB1 — Analog input 1 / change notification / port B |
| Pin 4 | AN2/SS1/CN4/RB2 — Analog input 2 / SPI slave select / port B |
| Pin 5 | AN3/INDX/CN5/RB3 — Analog input 3 / QEA index / port B |
| Pin 6 | AN4/CN6/RB4 — Analog input 4 / port B |
| Pin 7 | VDD — Power supply (3.0-3.6 V) |
| Pin 8 | OSC1/CLKI/RA2 — Crystal oscillator input / external clock |
| Pin 9 | OSC0/CLKO/RA3 — Crystal oscillator output / clock out |
| Pin 10 | PGED1/AN5/CN7/RB5 — In-circuit debug data channel 1 / analog input 5 |
| Pin 11 | PGEC1/AN6/CN8/RB6 — In-circuit debug clock channel 1 / analog input 6 |
| Pin 12 | AN7/CN9/RB7 — Analog input 7 / port B |
| Pin 13 | VSS — Ground reference |
| Pin 14 | VDD — Power supply (3.0-3.6 V) |
| Pin 15 | AN9/RB9 — Analog input 9 / port B |
| Pin 16 | AN10/RB10 — Analog input 10 / port B |
| Pin 17 | AN11/RB11 — Analog input 11 / port B |
| Pin 18 | AN12/RB12 — Analog input 12 / port B |
| Pin 19 | AN13/RB13 — Analog input 13 / port B |
| Pin 20 | AN14/RB14 — Analog input 14 / port B |
| Pin 21 | VSS — Ground reference |
| Pin 22 | VDD — Power supply (3.0-3.6 V) |
| Pin 23 | PGED2/AN8/RB8 — In-circuit debug data channel 2 / analog input 8 |
| Pin 24 | PGEC2/RP15/RF15 — In-circuit debug clock channel 2 / remappable pin |
| Pin 25 | RP14/RF14 — Peripheral remappable pin / port F |
| Pin 26 | RP13/RF13 — Peripheral remappable pin / port F |
| Pin 27 | RP12/RTCC/RF12 — Remappable pin / RTCC alarm / port F |
| Pin 28 | RP11/RF11 — Peripheral remappable pin / port F |
Typical Applications
DSPIC33EP128GP502T-I/SO is suitable for 6 applications: Industrial CAN Networking Nodes, Digital Power Supplies and Converters, Analog Sensor Interfaces, Motor Control Subsystems, Secure Embedded Systems, General Purpose Embedded Control.
Industrial CAN Networking Nodes
The integrated CAN 2.0B controller makes the DSPIC33EP128GP502T-I/SO a natural fit for industrial automation nodes on CANopen- or J1939-style buses. Its 70 MIPS dsPIC33E core has the headroom to run the application stack plus message filtering without external co-processors, while LINbus, UART, and SPI cover hybrid networks. 128KB Flash holds protocol stacks (e.g., CANopen) with room for field updates, and the 16KB RAM supports several buffered mailboxes. Place the CAN transceiver (e.g., MCP2551-class) on the C1TX/C1RX pins with a 120-ohm termination; the on-chip DMA offloads message handling so control-loop timing stays deterministic under bus load.
Recommended
Digital Power Supplies and Converters
The 70 MIPS core combined with high-speed PWM and the Peripheral Trigger Generator (PTG) makes the GP502 well suited to closed-loop buck, boost, and PFC converters. The PTG can sequence ADC sampling and PWM updates autonomously, keeping loop latency predictable, while DSP MAC instructions accelerate PI/PID compensation math. Microchip highlights this family's superior ADC performance for exactly this use case. Use the high-speed PWM module at switching frequencies of 100-500 kHz, feed the ADC through the PTG trigger, and keep the compensation ISR under a few microseconds. Note the GP502's PWM set is general purpose; for multi-phase or motor drives, consider the MC variants of the same dsPIC33E family.
Recommended
Analog Sensor Interfaces
With on-chip op amps, comparators, and the Charge Time Measurement Unit (CTMU), the DSPIC33EP128GP502T-I/SO can condition and measure sensors with minimal external components. The CTMU provides precise time-based charge measurement for capacitive sensing and current measurement (time-of-flight style), while the internal op amps can buffer or amplify signals at gain settings controlled in firmware. AN0-AN4 arrive directly on pins 2-6 of the SOIC-28. A typical topology feeds a bridge sensor into the internal op amp, samples via the 10/12-bit ADC at PTG-controlled intervals, and applies DSP filtering in the 70 MIPS core - avoiding a separate analog front end and shortening the signal chain.
Recommended
Motor Control Subsystems
Although the GP subfamily is not motor-control-specific, the 70 MIPS dsPIC33E core and high-speed PWM handles small BLDC/DC motor control tasks effectively, with the 128KB Flash accommodating sensorless estimation code (BEMF observers) plus commutation. The DSP MAC engine computes control loops fast enough for current-loop control in the tens-of-kHz range. Use complementary PWM outputs through gate drivers, sample shunt currents via the on-chip op amps to the ADC, and reserve the comparator module for cycle-by-cycle overcurrent protection. For traction or multi-axis designs, the same-footprint MC202 variants or dsPIC33CK parts provide dedicated motor PWM features and higher throughput.
Recommended
Secure Embedded Systems
For designs that require cryptographic protection, the drop-in DSPIC33EP128GP502-H/SO variant (identical footprint and die family) adds a Secure Hash accelerator, enabling SHA-256 secure boot and firmware authentication without changing the PCB. The standard GP502T-I/SO can be swapped to the -H part during production to add security, or the -H part can serve as a second-source in a common footprint to hedge supply. 128KB Flash stores the application plus signature verification code; 70 MIPS keeps boot-time authentication under tens of milliseconds. This makes the family attractive to industrial equipment vendors implementing secure firmware update flows over CAN or UART bootloaders.
Recommended
General Purpose Embedded Control
As a general-purpose 16-bit controller, the GP502 in SOIC-28 offers a balanced peripheral mix - I2C, SPI, two UARTs with IrDA/LIN support, PWM, ADC, CTMU, and PTG - at 70 MIPS, comfortably outperforming classic 8-bit PIC16/18 parts while retaining low cost and wide temperature availability. Typical uses include appliance control, metering front ends, HVAC boards, and instrumentation panels. The hand-migratable peripheral set, free MPLAB X IDE and XC16 compiler, and 5V-tolerant-style robustness make upgrades from dsPIC33F straightforward since code largely ports with minor configuration changes. Reuse of the SOIC-28 footprint across Flash sizes (32/64/128/256KB) simplifies BOM tiering across product lines.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP128GP502T-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP128GP502-H/SO | DSPIC33EP256GP502-I/SO | DSPIC33EP64GP502-I/SO | DSPIC33EP64MC202-I/SO | DSPIC33EP128GP502T-I/MM |
|---|---|---|---|---|---|---|
| Package | 28-SOIC (7.50mm) | 28-SOIC (7.50mm) - same | 28-SOIC (7.50mm) - same | 28-SOIC (7.50mm) - same | 28-SOIC (7.50mm) - same | 28-QFN-S 6x6 (different) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Speed | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS |
| Flash Memory | 128KB | 128KB | 256KB | 64KB | 64KB | 128KB |
| CAN Controller | Yes (CAN 2.0B) | Yes | Yes | Yes | Yes | Yes |
| Crypto / Secure Hash | No | Yes (SHA) | No | No | No | No |
| Peripheral Family | GP (General Purpose) | GP | GP | GP | MC (Motor Control) | GP |
Key Differentiators
- Largest Flash in same SOIC-28 footprint at 256KB (vs DSPIC33EP256GP502-I/SO)
- Crypto-free standard part at lower cost (vs DSPIC33EP128GP502-H/SO)
- General Purpose peripheral set with CAN and CTMU (vs DSPIC33EP64MC202-I/SO)
Design Notes
Decouple every VDD pin (pins 7, 14, 22) with a 0.1uF ceramic capacitor placed within 2mm of the pin, tied to the nearest VSS (pins 13, 21) with short return paths. At 70 MIPS with internal PLL, supply ripple couples directly into the ADC and oscillator, so a solid ground plane and one bulk 10uF capacitor per supply region are recommended. Keep the crystal (pins 8-9) within 10mm of the device with guard ground traces.
ICSP programming requires PGECx/PGEDx to be used as matched pairs - if PGEC2 is wired to ICSPCLK, ICSPDAT must go to PGED2. Mixing pairs prevents programming. Also note that analog-capable pins default to analog mode after reset; firmware must clear ANSEL-type registers (AD1PCFGL) before using pins 2-6 and 10-12, 15-20, 23 as digital I/O, a common first-run bring-up failure.
Estimated: core current at 70 MIPS is on the order of 40-60 mA (typical for dsPIC33E family; consult the datasheet electrical characteristics chapter for the exact figure). A 3.3V regulator rated at 150 mA or more per device plus I/O budget provides margin. Sequence MCLR low during power-up and use a supervisor reset for reliable flash programming and PLL lock.
Remappable pins RP11-RP15 (pins 24-28) let you route UART/SPI anywhere, but keep high-speed SPI traces under 10cm and series-terminate 33-ohm if driving off-board. For CAN on remappable pins, route TX/RX as a short differential pair after the transceiver and observe the 120-ohm bus termination at both network ends only.
Compliance Information
Compliance status not stated in the retrieved web data; verify on Microchip's product page. AEC-Q100-qualified variants exist in the broader family (e.g., DSPIC33EP128GP502T-E/SS is listed as AEC-Q100 qualified), but this commercial-grade /SO part is not automotive qualified.
