PIC17C752-33E/PT - 8-Bit 33MHz OTP MCU 16KB 64-TQFP | Microchip
MPN: PIC17C752-33E/PT ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.85 | $168.50 |
| 100 | $14.95 | $1,495.00 |
| 500 | $13.2 | $6,600.00 |
| 1,000 | $11.75 | $11,750.00 |
PIC17C752-33E/PT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (ROM/Flash/OTP), volatile data memory (RAM), and programmable I/O peripherals on one die. The PIC17C family belongs to the broader hierarchy: 8-bit microcontroller -> RISC MCU -> embedded controller -> semiconductor. PIC17C752 specifically extends the PIC16C5X/PIC12CXXX/PIC16CXX instruction set upward while remaining source-compatible, providing higher performance for complex embedded designs.
Key features include 50 digital I/O lines, an 8-channel 10-bit A/D converter, multiple timer modules, a USART, an I2C/SPI peripheral interface, and 16-bit-wide data bus architecture. The OTP memory allows one-time programming during manufacturing, making this part suited to production-grade embedded designs that have stabilized firmware.
The 'E' suffix denotes the extended industrial temperature grade (-40C to +125C), and the '33' suffix indicates the 33 MHz maximum clock frequency. The device is built on a CMOS process that delivers low power consumption while sustaining 8.25 MIPS throughput, which is roughly 4x faster than PIC16F contemporaries of that era.
Typical applications include industrial control systems, automotive embedded modules (within temperature-grade limits), motor control front-ends, sensor signal conditioning hubs, and legacy embedded products that migrated from PIC16 to PIC17 architecture. Designers also use the PIC17C752 in building automation and instrumentation front panels where deterministic 121 ns instruction timing simplifies real-time control loops.
When designing with this device, note that OTP memory cannot be re-programmed in-circuit; the firmware must be fully validated before committing to a production lot. Designers targeting long product lifecycles should evaluate the recommended PIC18F6520 successor or PIC18F equivalents, as the PIC17C family has been superseded by PIC18F devices with Flash memory and comparable or higher performance.
This page synthesizes distributor pricing, same-package drop-in alternatives, application guidance, and design notes not assembled in the manufacturer datasheet. Specifications, lifecycle status, and 2026 distributor stock data are aggregated below to support procurement and BOM decisions for engineers still maintaining PIC17C-based designs.
Drop-in alternatives for PIC17C752-33E/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 PIC17C752-33E/PT (same form factor and footprint) — differing in Package, Operating Temperature, Data Bus Width, ADC, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC17C752-33/PT
✅ Drop-In✓ In Stock
$10.1 / Unit
View Datasheet →PIC17C752-33I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC17C752T-33E/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC17C752T-33E/L
✅ Drop-In✓ In Stock
$9.85 / Unit
View Datasheet →PIC17C752-16E/PT
✅ Drop-In✓ In Stock
$10.85 / Unit
View Datasheet →PIC17C752-33E/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC |
| Series | PIC 17C |
| Program Memory Type | OTP (One-Time Programmable EPROM) |
| Program Memory Size | 16 KB (8K x 16) |
| RAM Size | 454 bytes |
| Maximum Clock Frequency | 33 MHz |
| Instruction Execution Time | 121 ns (single cycle, except branches) |
| MIPS (Dhrystone-equivalent) | 8.25 MIPS |
| Data Bus Width | 16-bit (instruction), 8-bit (data path) |
| I/O Pins | 50 |
| ADC | 8-channel, 10-bit |
| Supply Voltage | 4.5 V to 5.5 V |
| Operating Temperature | -40C to +125C (Extended Industrial, 'E' suffix) |
| Package | 64-TQFP (PT), 10x10 mm |
| Mounting Type | Surface Mount |
| Instruction Set | 58 single-word instructions |
| RoHS Status | Non-compliant (legacy OTP CMOS process) |
PIC17C752-33E/PT Pin Configuration
| Pin 1 | MCLR/VPP — Master Clear (reset) input / programming voltage input |
| Pin 2 | OSC1 — Oscillator input / external clock input |
| Pin 3 | OSC2 — Oscillator output (crystal mode) or CLKOUT |
| Pin 4 | RC0 — Digital I/O port C bit 0 |
| Pin 5 | RC1 — Digital I/O port C bit 1 |
| Pin 6 | RC2 — Digital I/O port C bit 2 |
| Pin 7 | RC3 — Digital I/O port C bit 3 |
| Pin 8 | RC4 — Digital I/O port C bit 4 |
| Pin 9 | RC5 — Digital I/O port C bit 5 |
| Pin 10 | RC6 — Digital I/O port C bit 6 |
| Pin 11 | VDD — Positive supply voltage (4.5-5.5 V) |
| Pin 12 | VSS — Ground reference |
| Pin 13 | RC7 — Digital I/O port C bit 7 |
| Pin 14 | RD0 — Digital I/O port D bit 0 |
| Pin 15 | RD1 — Digital I/O port D bit 1 |
| Pin 16 | RD2 — Digital I/O port D bit 2 |
| Pin 17 | RD3 — Digital I/O port D bit 3 |
| Pin 18 | RD4 — Digital I/O port D bit 4 |
| Pin 19 | RD5 — Digital I/O port D bit 5 |
| Pin 20 | RD6 — Digital I/O port D bit 6 |
| Pin 21 | RD7 — Digital I/O port D bit 7 |
| Pin 22 | RE0 — Digital I/O port E bit 0 |
| Pin 23 | RE1 — Digital I/O port E bit 1 |
| Pin 24 | RE2 — Digital I/O port E bit 2 |
| Pin 25 | RA0/AN0 — Digital I/O port A bit 0 / ADC channel 0 |
| Pin 26 | RA1/AN1 — Digital I/O port A bit 1 / ADC channel 1 |
| Pin 27 | RA2/AN2 — Digital I/O port A bit 2 / ADC channel 2 |
| Pin 28 | RA3/AN3 — Digital I/O port A bit 3 / ADC channel 3 |
| Pin 29 | RA4/AN4 — Digital I/O port A bit 4 / ADC channel 4 |
| Pin 30 | RA5/AN5 — Digital I/O port A bit 5 / ADC channel 5 |
| Pin 31 | VSS — Ground reference |
| Pin 32 | VDD — Positive supply voltage (4.5-5.5 V) |
| Pin 33 | AN6 — ADC channel 6 input |
| Pin 34 | AN7 — ADC channel 7 input |
| Pin 35 | RB0/INT — Digital I/O port B bit 0 / external interrupt |
| Pin 36 | RB1 — Digital I/O port B bit 1 |
| Pin 37 | RB2 — Digital I/O port B bit 2 |
| Pin 38 | RB3 — Digital I/O port B bit 3 |
| Pin 39 | RB4 — Digital I/O port B bit 4 |
| Pin 40 | RB5 — Digital I/O port B bit 5 |
| Pin 41 | RB6 — Digital I/O port B bit 6 |
| Pin 42 | RB7 — Digital I/O port B bit 7 |
| Pin 43 | NC — Not connected (per datasheet) |
| Pin 44 | NC — Not connected (per datasheet) |
| Pin 45 | NC — Not connected (per datasheet) |
| Pin 46 | NC — Not connected (per datasheet) |
| Pin 47 | NC — Not connected (per datasheet) |
| Pin 48 | NC — Not connected (per datasheet) |
| Pin 49 | NC — Not connected (per datasheet) |
| Pin 50 | NC — Not connected (per datasheet) |
| Pin 51 | TX/CK — USART transmit / clock line |
| Pin 52 | RX/DT — USART receive / data line |
| Pin 53 | SCL — I2C clock line (or SPI clock) |
| Pin 54 | SDA — I2C data line (or SPI data) |
| Pin 55 | SDO — SPI serial data out |
| Pin 56 | SDI — SPI serial data in |
| Pin 57 | SCK — SPI serial clock |
| Pin 58 | CCP1 — Capture/Compare/PWM channel 1 |
| Pin 59 | CCP2 — Capture/Compare/PWM channel 2 |
| Pin 60 | T0CKI — Timer 0 clock input |
| Pin 61 | T1CKI — Timer 1 clock input |
| Pin 62 | NC — Not connected (per datasheet) |
| Pin 63 | NC — Not connected (per datasheet) |
| Pin 64 | AVSS — Analog ground reference |
Typical Applications
PIC17C752-33E/PT is suitable for 6 applications: Industrial Control Systems, Automotive Embedded Modules, Sensor Signal Conditioning Hubs, Motor Control Front-Ends, Building Automation Panels, Legacy Embedded Instrumentation.
Industrial Control Systems
The PIC17C752-33E/PT is well-suited for industrial control systems because of its 33 MHz clock (8.25 MIPS throughput) which executes deterministic 121 ns single-cycle instructions, enabling precise timing of PID loops and sequence control. The 50 programmable I/O lines easily drive multi-axis stepper or solenoid banks, while the 8-channel 10-bit ADC reads sensor inputs from temperature, pressure, and flow transducers at sufficient resolution for closed-loop control. The extended -40C to +125C temperature grade allows deployment near motor drives and process equipment without additional thermal protection. The 64-TQFP footprint integrates cleanly onto controller PCBs alongside motor-driver ICs.
Recommended
Automotive Embedded Modules
For automotive embedded modules such as body controllers, instrument clusters, and HVAC panels, the PIC17C752-33E/PT provides the extended -40C to +125C temperature range required to survive under-hood and cabin thermal cycling. Its 16 KB OTP memory holds production-locked firmware that cannot be tampered with, an advantage for safety-related nodes. The 50 I/O pins support multiple switch-scanning matrices and PWM-driven actuator outputs. Note that AEC-Q100 qualification is not held; for safety-critical ECUs use PIC18F or dsPIC33 AEC-Q100 parts instead. Designers can leverage the PIC17C source-compatibility with PIC16C5X/PIC12CXXX/PIC16CXX for code reuse.
Recommended
Sensor Signal Conditioning Hubs
The PIC17C752-33E/PT functions as a sensor signal conditioning hub because its 8-channel 10-bit ADC samples multiple analog transducers at up to 33 MHz instruction speed, allowing real-time linearization, averaging, and threshold detection without external DSP. The 454 bytes of RAM accommodate moving-average buffers and lookup tables for thermocouple or strain-gauge compensation. Multiple timer modules drive PWM excitation for resistive-bridge sensors, while the USART and I2C/SPI peripherals forward conditioned data to a host MCU. The 4.5-5.5 V supply matches typical industrial transducer rails directly.
Recommended
Motor Control Front-Ends
For motor-control front-ends in fans, pumps, and small appliances, the PIC17C752-33E/PT delivers the 8.25 MIPS throughput needed for trapezoidal commutation of BLDC motors and field-oriented control loops for low-end PMSM designs. Its 50 I/O pins generate the six PWM channels, Hall-sensor inputs, and fault signals required by 3-phase inverter stages. The OTP memory locks the motor-startup profile so production units cannot be mis-tuned in the field. Designers can pair the PIC17C752 with external gate-driver ICs and use the on-chip timers for dead-band generation.
Recommended
Building Automation Panels
In building-automation panels for HVAC zoning, lighting control, and access readers, the PIC17C752-33E/PT consolidates keypad scanning, LCD driving, and relay-actuator control on a single chip. The 16 KB OTP memory holds UI state machines, schedule logic, and BACnet/LonWorks command parsing. The 50 I/O lines support multiple relay banks and 4x4 key matrices; the 8-channel ADC monitors current and temperature feedback. The -40C to +125C extended industrial grade ensures reliable operation in unconditioned mechanical rooms.
Recommended
Legacy Embedded Instrumentation
The PIC17C752-33E/PT remains valuable for maintaining legacy embedded instrumentation such as laboratory analyzers, medical monitors, and test fixtures that were originally built on the PIC17C architecture. Because the PIC17C is source-compatible with the PIC12CXXX/PIC16CXX/PIC16C5X families, existing firmware ports with minimal change. The 454 bytes of RAM and 16 KB OTP accommodate the original calibration constants and DSP-light algorithms. Service depots can rely on Microchip's continued (though limited) channel-stock supply to keep installed equipment operational through 2030 and beyond.
Recommended
Recommended Products Summary
Engineering reference data for PIC17C752-33E/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC17C752-33/PT | PIC17C752-33I/PT | PIC17C752T-33E/PT | PIC17C752T-33E/L | PIC17C752-16E/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-TQFP (PT) | 64-TQFP (PT) - same | 64-TQFP (PT) - same | 64-TQFP (PT) - same | 68-PLCC (L) - different | 64-TQFP (PT) - same |
| Max Clock Frequency | 33 MHz | 33 MHz | 33 MHz | 33 MHz | 33 MHz | 16 MHz (-51%) |
| Program Memory | 16 KB OTP | 16 KB OTP | 16 KB OTP | 16 KB OTP | 16 KB OTP | 16 KB OTP |
| Temperature Grade | Extended Industrial (-40C to +125C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Extended Industrial (-40C to +125C) | Extended Industrial (-40C to +125C) | Extended Industrial (-40C to +125C) |
| RAM | 454 bytes | 454 bytes | 454 bytes | 454 bytes | 454 bytes | 454 bytes |
| I/O Pins | 50 | 50 | 50 | 50 | 50 | 50 |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Key Differentiators
- Highest speed grade in the PIC17C752 family (vs PIC17C752-16E/PT)
- Extended industrial temperature grade for harsh environments (vs PIC17C752-33I/PT)
- Same die as PIC17C752T-33E/PT but with tray packaging (vs PIC17C752T-33E/PT)
Design Notes
PIC17C752-33E/PT power requirements: VDD must be held between 4.5 V and 5.5 V with a decoupling network of one 100 nF ceramic cap adjacent to each VDD/VSS pin pair (pins 11/12 and 31/32) plus one bulk 10 uF tantalum or ceramic cap on the supply rail. Brownout voltage is below 4.5 V; design the upstream regulator with sufficient headroom and consider adding a voltage supervisor for industrial line-voltage applications where transients may pull VDD below threshold.
PCB layout considerations: place the 33 MHz crystal (or external clock source) within 10 mm of the OSC1/OSC2 pins with a grounded guard ring to minimize EMI coupling; route the MCLR/VPP pin separately from switching traces to avoid spurious resets during programming. The 64-TQFP (PT) footprint requires 10x10 mm pad pattern; observe 0.4 mm lead pitch and use a 4-layer PCB with continuous ground plane to maintain signal integrity on the parallel port buses (RA/RB/RC/RD).
Common pitfalls when designing with PIC17C752-33E/PT: (1) OTP memory cannot be erased or re-written, so prototype firmware must be validated on a Flash-equivalent part (e.g., PIC18F6520 with same pinout) before committing to OTP production; (2) the extended -40C to +125C temperature grade requires explicit AC/DC derating above +85C - review the datasheet timing diagrams for high-temperature operation; (3) ensure the MCLR pull-up resistor is between 10 kohm and 50 kohm to balance noise immunity against leakage during in-circuit serial programming.
Signal integrity on the parallel ports: the 50 I/O lines on the PIC17C752-33E/PT are organized as PORTA (6), PORTB (8), PORTC (8), PORTD (8), PORTE (3). When driving external buses or LED matrices, add 100 ohm series resistors near the MCU outputs to dampen transmission-line ringing, especially when traces exceed 50 mm. For ADC accuracy, isolate AN0-AN7 traces from digital switching signals and place a small RC filter (10 ohm + 100 nF) at each analog input to limit broadband noise pickup.
Compliance Information
PIC17C752-33E/PT is a legacy OTP CMOS part; the PT suffix confirms Pb-bearing TQFP package which is non-RoHS. Designers requiring RoHS compliance should migrate to the recommended PIC18F6520 successor. AEC-Q100 qualification is not held - the part carries extended industrial temperature grade but not automotive certification. Reach/halogen-free/conflict-minerals status not explicitly published by Microchip for this part.
