PIC32MX320F128HT-80I/PT - 80MHz 32-bit MCU 128KB Flash | Microchip
MPN: PIC32MX320F128HT-80I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.85 | $6.85 |
| 10 | $6.2 | $62.00 |
| 100 | $5.5 | $550.00 |
| 500 | $4.95 | $2,475.00 |
| 1,000 | $4.45 | $4,450.00 |
PIC32MX320F128HT-80I/PT Overview
A 32-bit microcontroller (MCU) is a single-chip computer that integrates a high-performance processor core, Flash program memory, SRAM data memory, and a rich set of on-chip peripherals (ADC, timers, USB, UART, SPI, I2C). PIC32MX parts use the MIPS M4K core, placing them in the broader hierarchy MCU -> microcontroller -> embedded processor -> semiconductor, and they are widely deployed when 8/16-bit parts lack the throughput or memory needed for graphical user interfaces, USB stacks, or real-time control loops.
Key features of this part include 128 KB on-chip Flash organized as 128K x 8, 16 KB SRAM, an 80 MHz maximum CPU clock (40 MHz system clock for peripherals), five 16-bit timers/counters, two I2C, two SPI, two UART channels, USB 2.0 full-speed device/host/OTG, a 16-channel 10-bit ADC with 1 Msps, and a parallel master port. The industrial temperature grade (-40C to +85C) and 2.3V-3.6V single supply operation simplify integration into harsh environments.
The architecture combines a 5-stage pipelined MIPS32 core with single-cycle multiplication and hardware divide, enabling 1.56 DMIPS/MHz and excellent deterministic interrupt response. The PMD (peripheral module disable) and power-saving modes let idle peripherals draw near-zero current, which is critical for USB bus-powered and battery-backed designs.
Typical applications include USB human-interface devices, industrial control and HMI panels, embedded web servers, data loggers, sensor hubs, and low-cost graphics terminals. The 80 MHz performance, USB, and 128 KB Flash cover most mid-range connected-embedded workloads.
When designing with this MCU, budget for a 2.3V-3.6V LDO and follow Microchip's recommended decoupling network (100 nF + 10 uF bulk). Always program the device through the ICSP interface using MPLAB X IDE + XC32 compiler; never assume 80 MHz operation without proper PLL configuration.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes beyond what is in the manufacturer datasheet alone.
Drop-in alternatives for PIC32MX320F128HT-80I/PT — 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 PIC32MX320F128HT-80I/PT (same form factor and footprint) — differing in ADC, Core Architecture, I/O Pins, Maximum CPU Frequency, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX320F128H-80I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX340F128HT-80I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC32MX320F128HT-40I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MX270F256D-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MX230F256D-50I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.15 / Unit
View Datasheet →PIC32MX150F128D-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.51 / Unit
View Datasheet →PIC32MX170F256B-I/ML
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.25 / Unit
View Datasheet →PIC32MX320F128HT-80I/PT Maximum Ratings & Electrical Characteristics
| Core | MIPS32 M4K |
| Core Architecture | 32-bit RISC, 5-stage pipeline |
| Maximum CPU Frequency | 80 MHz |
| System Clock | 40 MHz (peripheral bus) |
| Program Memory (Flash) | 128 KB (128K x 8) |
| Data Memory (SRAM) | 16 KB |
| Operating Voltage | 2.3 V to 3.6 V |
| I/O Pins | 53 |
| ADC | 10-bit, 16-channel, 1 Msps |
| USB | USB 2.0 Full-Speed Device/Host/OTG |
| UART | 2 |
| SPI | 2 |
| I2C | 2 |
| Timers | 5 x 16-bit |
| Package | 64-pin TQFP (PT), 10x10 mm |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (Industrial, -I suffix) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC32MX320F128HT-80I/PT Pin Configuration
| Pin 1 | RP15/PMA0/PMD15/AN15/SS2/RF5 — Remappable I/O / Parallel Master Port Address bit 0 |
| Pin 2 | RP14/PMA1/PMD14/AN14/SCK2/RF4 — Remappable I/O / SPI2 clock |
| Pin 3 | RP13/PMD13/AN13/C2IN-/OCFA/RF3 — Remappable I/O / Comparator input |
| Pin 4 | RP12/PMD12/AN12/C2IN+/RF2 — Remappable I/O / Comparator input |
| Pin 5 | RP11/OC5/PMRD/RF1 — Remappable I/O / Output Compare 5 |
| Pin 6 | RP10/PMWR/U6TX/RF0 — Remappable I/O / PMP write strobe |
| Pin 7 | SDA2/RA15 — I2C2 data / GPIO |
| Pin 8 | SCL2/RA14 — I2C2 clock / GPIO |
| Pin 9 | RA9/TDI — JTAG TDI / GPIO |
| Pin 10 | RA10/TCK — JTAG TCK / GPIO |
| Pin 11 | RA1/PGEC1 — ICSP clock / GPIO |
| Pin 12 | RA0/PGED1 — ICSP data / GPIO |
| Pin 13 | RA4/SOSCO — Secondary oscillator / GPIO |
| Pin 14 | RA5/SOSCI — Secondary oscillator / GPIO |
| Pin 15 | VDD — Positive supply (3.3V) |
| Pin 16 | RG15 — GPIO / PMP address |
| Pin 17 | RG13 — GPIO / PMP address |
| Pin 18 | RG12 — GPIO / PMP address |
| Pin 19 | RG14 — GPIO / PMP address |
| Pin 20 | VSS — Ground |
| Pin 21 | RG0/DEVCFG0 — GPIO / PMP data |
| Pin 22 | RG1 — GPIO / PMP data |
| Pin 23 | RG2 — GPIO / PMP data |
| Pin 24 | RG3 — GPIO / PMP data |
| Pin 25 | RE0/PMD0 — GPIO / PMP data |
| Pin 26 | RE1/PMD1 — GPIO / PMP data |
| Pin 27 | RE2/PMD2 — GPIO / PMP data |
| Pin 28 | RE3/PMD3 — GPIO / PMP data |
| Pin 29 | RE4/PMD4 — GPIO / PMP data |
| Pin 30 | RE5/PMD5 — GPIO / PMP data |
| Pin 31 | RE6/PMD6 — GPIO / PMP data |
| Pin 32 | RE7/PMD7 — GPIO / PMP data |
| Pin 33 | VDD — Positive supply (3.3V) |
| Pin 34 | RB0/PGED2/AN0 — ICSP data / ADC ch0 |
| Pin 35 | RB1/PGEC2/AN1 — ICSP clock / ADC ch1 |
| Pin 36 | RB2/AN2 — GPIO / ADC ch2 |
| Pin 37 | RB3/AN3 — GPIO / ADC ch3 |
| Pin 38 | RB4/AN4 — GPIO / ADC ch4 |
| Pin 39 | RB5/AN5 — GPIO / ADC ch5 |
| Pin 40 | RB6/AN6/OC1 — GPIO / ADC ch6 / OC1 |
| Pin 41 | RB7/AN7/OC2 — GPIO / ADC ch7 / OC2 |
| Pin 42 | VSS — Ground |
| Pin 43 | RB8/AN8/C1OUT — GPIO / ADC ch8 / Comparator out |
| Pin 44 | RB9/AN9/C2OUT — GPIO / ADC ch9 / Comparator out |
| Pin 45 | RB10/AN10 — GPIO / ADC ch10 |
| Pin 46 | RB11/AN11 — GPIO / ADC ch11 |
| Pin 47 | RC1/AN12 — GPIO / ADC ch12 |
| Pin 48 | RC2/AN13 — GPIO / ADC ch13 |
| Pin 49 | RC3/AN14 — GPIO / ADC ch14 |
| Pin 50 | RC4/AN15 — GPIO / ADC ch15 |
| Pin 51 | VDD — Positive supply (3.3V) |
| Pin 52 | OSC1/CLKI/RC12 — Crystal input / external clock |
| Pin 53 | OSC2/CLKO/RC15 — Crystal output / system clock out |
| Pin 54 | VSS — Ground |
| Pin 55 | RC13/CVREF — GPIO / comparator reference |
| Pin 56 | RC14 — GPIO |
| Pin 57 | RA6/TMS — JTAG TMS / GPIO |
| Pin 58 | RA7/TDO — JTAG TDO / GPIO |
| Pin 59 | RD0/SDO1 — SPI1 data out / GPIO |
| Pin 60 | RD1/SDI1 — SPI1 data in / GPIO |
| Pin 61 | RD2/SCK1 — SPI1 clock / GPIO |
| Pin 62 | RD3/SS1 — SPI1 slave select / GPIO |
| Pin 63 | RD4/SDO2/U1TX — SPI2/UART1 TX / GPIO |
| Pin 64 | RD5/SDI2/U1RX — SPI2/UART1 RX / GPIO |
Typical Applications
PIC32MX320F128HT-80I/PT is suitable for 6 applications: USB Human-Interface Devices (HID), Industrial Control and HMI Panels, Embedded Web Servers and TCP/IP Connectivity, Data Acquisition and Sensor Hubs, Low-Cost Graphics and LCD Terminals, Consumer Electronics and Home Appliance Controllers.
USB Human-Interface Devices (HID)
The PIC32MX320F128HT-80I/PT is well suited for USB HID peripherals such as custom keyboards, mice, game controllers, and industrial input panels. Its integrated USB 2.0 full-speed controller (device, host, OTG) eliminates the need for an external PHY, and the 80 MHz MIPS M4K core processes HID reports with deterministic interrupt latency. The 128 KB Flash holds the USB stack plus a 2 KB bootloader, while 16 KB SRAM comfortably buffers HID reports. Placed on a 4-layer board with 0.1uF + 4.7uF decoupling near the VDD pins, it delivers full-speed USB throughput with low EMI.
Recommended
Industrial Control and HMI Panels
The 53 GPIO pins of the PIC32MX320F128HT-80I/PT directly drive 7-segment displays, keypads, and relay outputs in industrial HMI front panels. The 16-channel 10-bit ADC samples 4-20 mA loop sensors at 1 Msps, and the 5 x 16-bit timers generate precise PWM outputs for motor or valve control. The industrial -40C to +85C temperature grade supports factory-floor operation. The 80 MHz core plus DMA offload keeps the UI responsive while running control loops, and the 16 KB SRAM holds a 128-segment LCD buffer plus Modbus RTU frame.
Recommended
Embedded Web Servers and TCP/IP Connectivity
The PIC32MX320F128HT-80I/PT is widely used in low-cost connected devices running Microchip's TCP/IP stack (or lwIP) for embedded web servers and MQTT clients. The 128 KB Flash accommodates the TCP/IP stack, an HTTP server, and application logic, while 16 KB SRAM serves socket buffers. The 80 MHz core and DMA deliver the throughput needed for several concurrent sockets at moderate data rates. With an external ENC28J60 or ENC424J600 Ethernet controller, it becomes a full-featured web server in industrial or building-automation applications.
Recommended
Data Acquisition and Sensor Hubs
The 16-channel 10-bit 1 Msps ADC of the PIC32MX320F128HT-80I/PT enables multi-sensor data acquisition at 100 kHz aggregate sample rates, suitable for vibration, temperature, and process-monitoring applications. The 53 I/O pins interface with SPI sensors, I2C peripherals, and parallel ADCs, while the 16 KB RAM holds time-stamped sample buffers for SD-card logging. The device's DMA engine moves ADC data to RAM without CPU intervention, leaving 80% of the core free for filtering, FFT, or compression before writing to removable storage.
Recommended
Low-Cost Graphics and LCD Terminals
The PIC32MX320F128HT-80I/PT drives small TFT or OLED graphical displays (up to 320x240 QVGA) with the PMP (Parallel Master Port) peripheral in 8-bit mode. The 80 MHz MIPS M4K core can update full-screen buffers at 30 fps, while the 16 KB SRAM holds a 320x240x1bpp monochrome framebuffer or a smaller RGB565 tile. Designers often pair it with the SSD1963 or ILI9341 controller, sending frame data via PMP and reading touch input over SPI. The 53 I/O frees pins for backlight PWM and touch interrupt.
Recommended
Consumer Electronics and Home Appliance Controllers
The PIC32MX320F128HT-80I/PT is used in consumer appliances such as coffee machines, washing-machine front panels, and air-conditioner controllers. The 80 MHz core handles user-interface logic, sensor fusion, and motor-control loops; USB enables firmware update and diagnostics. The integrated 16-bit timers generate precise PWM for TRIAC or IGBT drivers, and the 53 I/O connect keypads, LED rings, and rotary encoders. With a 3.3V LDO and ESD-protected USB, the design meets consumer safety and reliability expectations.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX320F128HT-80I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX320F128H-80I/PT | PIC32MX340F128HT-80I/PT | PIC32MX270F256D-I/PT | PIC32MX230F256D-50I/PT | PIC32MX150F128D-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-TQFP (PT), 10x10 mm | 64-TQFP (PT) - same | 64-TQFP (PT) - same | 64-TQFP (PT) - same | 64-TQFP (PT) - same | 64-TQFP (PT) - same |
| Maximum CPU Frequency | 80 MHz | 80 MHz | 80 MHz | 50 MHz | 50 MHz | 40 MHz |
| Flash | 128 KB | 128 KB | 128 KB | 256 KB | 256 KB | 128 KB |
| SRAM | 16 KB | 16 KB | 16 KB | 64 KB | 16 KB | 32 KB |
| USB | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed + CAN | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed |
| I/O Pins | 53 | 53 | 53 | 53 | 53 | 53 |
| ADC | 10-bit, 16-ch, 1 Msps | 10-bit, 16-ch, 1 Msps | 10-bit, 16-ch, 1 Msps | 10-bit, 28-ch, 1 Msps | 10-bit, 28-ch, 1 Msps | 10-bit, 28-ch, 1 Msps |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- 100% register/firmware compatible with PIC32MX320F128H-80I/PT (vs PIC32MX320F128H-80I/PT)
- Highest CPU clock in the 64-TQFP 128 KB Flash class (vs PIC32MX270F256D-I/PT (50 MHz, 256 KB Flash))
- Mature, widely-supported silicon with full Microchip toolchain (vs Generic 32-bit MCU alternatives from non-Microchip vendors)
Design Notes
The PIC32MX320F128HT-80I/PT operates from 2.3V to 3.6V and has multiple VDD/VSS pins (15, 20, 33, 42, 51, 54). Place a 100 nF 0.1uF X7R decoupling capacitor within 3 mm of every VDD/VSS pair, plus a single 4.7uF to 10uF bulk capacitor near the IC. The internal 1.8V regulator powers the core; no external core supply is needed. USB bus-powered designs must enforce <100 mA average inrush to comply with USB 2.0 specs.
Do not assume 80 MHz operation out of reset: the device boots on the FRC (internal 8 MHz) oscillator. To reach 80 MHz you must configure the PLL with the correct divider/multiplier and switch the system clock source. Failing to set the SYSKEY register leaves configuration registers locked. The ICSP pins PGEC1/PGED1 (RA1/RA0) must remain accessible for in-circuit programming - do not repurpose them as outputs in production boards without a debug header.
The 64-pin TQFP (10x10 mm) has 0.5 mm pitch, so use 0.25 mm via-in-pad or 0.2 mm traces with 0.2 mm clearances for the inner pins. Place the 8 MHz primary crystal within 5 mm of OSC1/OSC2 with traces symmetrically matched. Route the USB D+/D- differential pair with 90-ohm differential impedance and keep them short and isolated. Connect all 4 VSS pins and all 3 VDD pins with low-impedance pours to avoid ground bounce during USB enumeration.
Compliance Information
RoHS and lead-free per Microchip product page. Industrial temperature grade (-40C to +85C) but not AEC-Q100 qualified for automotive. For automotive, consider PIC32MX variants with -V or automotive suffixes, or migrate to dsPIC33/PIC32MK families.
