DSPIC33EP128GP502T-I/SS - 16-Bit DSC 70 MIPS 128KB | Microchip
MPN: DSPIC33EP128GP502T-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.12 | $4.12 |
| 10 | $3.71 | $37.10 |
| 100 | $3.3 | $330.00 |
| 500 | $2.97 | $1,485.00 |
| 1,000 | $2.64 | $2,640.00 |
DSPIC33EP128GP502T-I/SS Overview
A digital signal controller (DSC) is a hybrid device that merges the real-time control capabilities of a microcontroller (MCU) with the math throughput of a digital signal processor (DSP). In the product hierarchy, a DSC sits between a general-purpose MCU and a dedicated DSP: it executes control loops, handles interrupts, and drives peripherals like an MCU, while its single-cycle multiply-accumulate (MAC) unit and barrel shifter accelerate filtering and transform algorithms. The dsPIC33EP128GP502T-I/SS therefore belongs to the Microchip dsPIC33E family of 16-bit DSCs, which targets embedded control applications requiring both deterministic response and signal processing.
Key features include 70 MIPS operation at 3.0 V to 3.6 V, 128 KB Flash (43K x 24-bit words), 16 KB SRAM, a 10-bit/12-bit ADC, two operational amplifiers, three analog comparators, and a CAN communication interface. The Peripheral Trigger Generator (PTG) offloads complex peripheral sequencing from the CPU, while high-speed PWM modules support motor control and switched-mode power supply topologies.
The device uses Microchip's modified Harvard architecture with a 16-bit data path and 24-bit instruction words, enabling single-cycle execution of most instructions. Its DSP engine includes a 16x16-bit multiplier, a 40-bit accumulator, and two 40-bit saturating accumulators for fixed-point signal processing. This architecture allows motor field-oriented control (FOC) loops and digital power control loops to run at rates that a conventional 8-bit or low-end 16-bit MCU cannot sustain.
Typical applications include brushless DC (BLDC) and permanent magnet synchronous motor (PMSM) control, digital power supplies, solar micro-inverters, automotive sensor interfaces, and industrial automation nodes. The integrated op amps and comparators reduce external component count in current-sensing and fault-detection circuits, while the CAN interface supports networked industrial and automotive subsystems.
When designing with this device, ensure that all VDD and VSS pins are connected even if some appear unused, because incomplete power pin connections can cause programming failures. Decouple each VDD pin with a 0.1 uF ceramic capacitor placed as close to the pin as possible, and provide a clean 3.3 V rail within the 3.0 V to 3.6 V operating range.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single reference for selection, replacement, and layout decisions.
Drop-in alternatives for DSPIC33EP128GP502T-I/SS — 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/SS (same form factor and footprint) — differing in Package, Operating Temperature, Core Architecture, Program Memory (Flash), RAM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP128GP502-I/SS
✅ Drop-In✓ In Stock
$2.9 / Unit
View Datasheet →DSPIC33EP128GP502-E/SS
✅ Drop-In✓ In Stock
$2.75 / Unit
View Datasheet →DSPIC33EP128GP502T-E/SS
✅ Drop-In✓ In Stock
$3.05 / Unit
View Datasheet →DSPIC33EP128GP502-H/SO
✅ Drop-In✓ In Stock
$3.36 / Unit
View Datasheet →DSPIC33EP128GM304T-I/ML
✅ Drop-In✓ In Stock
$3.62 / Unit
View Datasheet →DSPIC33EP128GP502T-I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC DSC (modified Harvard) |
| Maximum CPU Speed | 70 MIPS |
| Program Memory (Flash) | 128 KB (43K x 24-bit) |
| Data Memory (RAM) | 16 KB |
| Operating Voltage | 3.0 V to 3.6 V |
| Package | 28-pin SSOP (0.209 in / 5.30 mm body) |
| Mounting Type | Surface Mount |
| ADC Resolution | 10-bit / 12-bit |
| Operational Amplifiers | 2 on-chip op amps |
| Analog Comparators | 3 comparators |
| CAN Interface | 1 CAN module |
| Peripheral Trigger Generator | Yes (PTG) |
| High-Speed PWM | Yes (motor control / digital power) |
| Temperature Range (Industrial) | -40C to +85C |
| RoHS Status | Compliant |
| Product Series | dsPIC33EP |
| Packaging | Tape & Reel (T suffix) |
DSPIC33EP128GP502T-I/SS Pin Configuration
| Pin 1 | MCLR — Master clear (reset) input, active low |
| Pin 2 | AN0 — Analog input channel 0 |
| Pin 3 | AN1 — Analog input channel 1 |
| Pin 4 | PGED1 — Programming data / digital I/O |
| Pin 5 | PGEC1 — Programming clock / digital I/O |
| Pin 6 | AN2 — Analog input channel 2 |
| Pin 7 | AN3 — Analog input channel 3 |
| Pin 8 | VSS — Ground |
| Pin 9 | OSC1 — Primary oscillator input / clock |
| Pin 10 | OSC2 — Primary oscillator output / clock |
| Pin 11 | VDD — Positive supply (3.0 V to 3.6 V) |
| Pin 12 | PGED2 — Programming data / digital I/O |
| Pin 13 | PGEC2 — Programming clock / digital I/O |
| Pin 14 | AN4 — Analog input channel 4 |
| Pin 15 | AN5 — Analog input channel 5 |
| Pin 16 | AN6 — Analog input channel 6 |
| Pin 17 | AN7 — Analog input channel 7 |
| Pin 18 | VSS — Ground |
| Pin 19 | C1IN+ — Comparator 1 non-inverting input |
| Pin 20 | C1IN- — Comparator 1 inverting input |
| Pin 21 | C2IN+ — Comparator 2 non-inverting input |
| Pin 22 | C2IN- — Comparator 2 inverting input |
| Pin 23 | VDD — Positive supply (3.0 V to 3.6 V) |
| Pin 24 | CANTX — CAN transmit output |
| Pin 25 | CANRX — CAN receive input |
| Pin 26 | PWM1H — High-speed PWM output 1 high |
| Pin 27 | PWM1L — High-speed PWM output 1 low |
| Pin 28 | VSS — Ground |
Typical Applications
DSPIC33EP128GP502T-I/SS is suitable for 6 applications: Brushless DC Motor Control, Digital Power Supply Control, Industrial Automation and CAN Nodes, Solar Micro-Inverter Control, Automotive Sensor Interface, Precision Analog Measurement.
Brushless DC Motor Control
The DSPIC33EP128GP502T-I/SS fits BLDC and PMSM motor control because its 70 MIPS DSC core executes field-oriented control (FOC) loops in real time while the high-speed PWM module generates complementary three-phase outputs with dead-time insertion. The 10/12-bit ADC samples phase currents, and the two on-chip op amps condition shunt signals, eliminating external current-sense amplifiers. In a typical design, the DSC runs the Clarke and Park transforms plus two PI current loops at 10-20 kHz, leaving headroom for speed and position loops. The Peripheral Trigger Generator sequences ADC conversions and PWM updates without CPU intervention, reducing jitter. Compared with a general-purpose 16-bit MCU, the single-cycle MAC unit cuts FOC execution time substantially, but the 28-pin package limits total I/O, so designs needing many hall sensors or encoder channels should evaluate the larger 44-pin dsPIC33EP variants.
Recommended
Digital Power Supply Control
The DSPIC33EP128GP502T-I/SS is used in digital power conversion because its high-speed PWM and 10/12-bit ADC enable closed-loop control of buck, boost, and LLC topologies at switching frequencies up to hundreds of kHz. The DSC core computes voltage-mode or current-mode compensators in software, allowing loop coefficients to be changed without hardware rework. The Peripheral Trigger Generator synchronizes ADC sampling to PWM edges, which is essential for accurate average-current measurement and for avoiding switching noise in the feedback path. The integrated comparators provide cycle-by-cycle overcurrent protection independent of software latency. A trade-off is that the 28-pin SSOP package offers fewer PWM channels than larger dsPIC33EP devices, so multi-phase or interleaved designs may need a higher-pin-count variant. Thermal management is straightforward because the DSC dissipates well under 1 W at 70 MIPS.
Recommended
Industrial Automation and CAN Nodes
The DSPIC33EP128GP502T-I/SS suits industrial automation nodes because it integrates a CAN module, 128 KB Flash, and 16 KB RAM in a compact 28-pin SSOP, allowing a single device to run control logic and communicate on a CAN bus. In a typical node, the DSC reads sensors through the 10/12-bit ADC, executes deterministic control code, and exchanges process data over CAN at up to 1 Mbit/s. The 70 MIPS core provides enough headroom for protocol handling plus application logic, while the op amps and comparators can implement local signal conditioning and fault detection. The industrial temperature rating of -40C to +85C covers most factory-floor environments. Designers should note that CAN transceiver selection and bus termination remain external, and that galvanic isolation may be required in noisy plants.
Recommended
Solar Micro-Inverter Control
The DSPIC33EP128GP502T-I/SS is applicable to solar micro-inverter control because it combines a 70 MIPS DSC core with high-speed PWM and fast ADC, the three ingredients needed for maximum power point tracking (MPPT) and grid-tied inverter control. The DSC executes perturb-and-observe or incremental-conductance MPPT algorithms while the PWM module drives the DC-AC stage, and the ADC samples panel voltage and current for the control loop. The Peripheral Trigger Generator keeps ADC sampling synchronized with PWM, improving measurement accuracy in the presence of switching noise. The integrated comparators can implement fast overcurrent shutdown. Because micro-inverters operate outdoors, thermal design matters: the DSC itself dissipates little, but the surrounding power stage dominates the thermal budget. The 28-pin package is adequate for single-stage topologies; two-stage designs may need more PWM channels.
Recommended
Automotive Sensor Interface
The DSPIC33EP128GP502T-I/SS can serve automotive sensor interface designs where local signal processing and CAN communication are required, provided the design uses an appropriately qualified temperature grade. Its 10/12-bit ADC, op amps, and comparators allow it to condition and digitize analog sensor outputs, while the CAN module reports results to the vehicle network. The 70 MIPS core supports filtering and linearization algorithms that would be impractical on an 8-bit MCU. For production automotive programs, the extended-temperature DSPIC33EP128GP502T-E/SS or an AEC-Q100 qualified variant should be selected instead of the industrial-grade part. Designers must also account for load-dump and reverse-battery protection on the supply, since the DSC itself does not include automotive-grade transient protection.
Recommended
Precision Analog Measurement
The DSPIC33EP128GP502T-I/SS supports precision analog measurement because it integrates a 10/12-bit ADC, two operational amplifiers, and three comparators, reducing the external analog bill of materials. In a measurement front end, the op amps buffer and gain sensor signals before the ADC digitizes them, and the comparators provide threshold detection without CPU polling. The 70 MIPS DSC core can run digital filters, such as FIR or IIR, to remove noise and improve effective resolution. The Peripheral Trigger Generator can schedule ADC conversions at precise intervals, which is important for coherent sampling in frequency-domain measurements. A practical limitation is that the on-chip ADC is 12-bit, so applications needing 16-bit or higher resolution must use an external ADC interfaced through SPI or I2C.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP128GP502T-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP128GP502-I/SS | DSPIC33EP128GP502-E/SS | DSPIC33EP128GP502T-E/SS | DSPIC33EP128GP502-H/SO | DSPIC33EP128GM304T-I/ML |
|---|---|---|---|---|---|---|
| Package | 28-pin SSOP | 28-pin SSOP - same | 28-pin SSOP - same | 28-pin SSOP - same | 28-pin SOIC | 44-pin QFN |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Speed | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS |
| Flash Memory | 128 KB (43K x 24-bit) | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB |
| Operating Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V |
Key Differentiators
- Tape-and-reel packaging for automated assembly (vs DSPIC33EP128GP502-I/SS)
- Industrial temperature grade with lower cost than extended grade (vs DSPIC33EP128GP502-E/SS)
- 28-pin SSOP footprint for easy inspection and rework (vs DSPIC33EP128GP502T-I/MM)
- Integrated analog peripherals reduce external component count (vs DSPIC33EP128GM304T-I/ML)
Design Notes
Connect every VDD and VSS pin, even pins that appear unused in a given design. Microchip documentation for the dsPIC33EP128GP502 notes that if any VDD or VSS pin is left unconnected, programming may fail. Decouple each VDD pin with a 0.1 uF ceramic capacitor placed within a few millimeters of the pin, and add a bulk 10 uF capacitor near the package. Keep the 3.3 V rail within 3.0 V to 3.6 V across the full load and temperature range.
Route the analog input pins (AN0-AN7) away from high-speed PWM traces to preserve ADC accuracy. Use a separate analog ground return to the VSS pins and keep the op amp and comparator input traces short. For the 28-pin SSOP, a solid ground plane under the device reduces noise coupling. If the on-chip op amps are used for current sensing, place the shunt resistor close to the op amp inputs and use a Kelvin connection to avoid trace-resistance errors.
Do not confuse the SSOP and QFN-S package variants when ordering: the DSPIC33EP128GP502T-I/SS is a 28-pin SSOP, while the DSPIC33EP128GP502T-I/MM is a 28-pin QFN-S (6x6 mm). They are electrically equivalent but not footprint-compatible, so a board laid out for one cannot accept the other without a redesign. Also verify the temperature grade suffix (I = -40C to +85C, E = -40C to +125C) against the target environment before committing to a bill of materials.
Estimated: the dsPIC33EP128GP502T-I/SS core current at 70 MIPS and 3.3 V is typically in the tens of milliamps, so package power dissipation is well under 1 W and no heatsink is required. Junction temperature rise can be estimated as P x theta_JA; for a 28-pin SSOP with theta_JA on the order of 60-80 C/W and P around 0.3 W, the rise is roughly 18-24 C above ambient. Confirm actual current from the datasheet electrical characteristics for the specific peripheral configuration.
Compliance Information
RoHS compliance is stated for the dsPIC33EP family. The industrial-grade DSPIC33EP128GP502T-I/SS is not AEC-Q100 qualified; automotive programs should use an appropriately qualified variant. REACH, halogen-free, and conflict-minerals status were not confirmed in the retrieved data.
