PIC17C752T-33I/L - 8-Bit 33MHz OTP MCU 16KB | Microchip
MPN: PIC17C752T-33I/L ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $17.1 | $171.00 |
| 100 | $15.4 | $1,540.00 |
| 500 | $13.95 | $6,975.00 |
| 1,000 | $12.6 | $12,600.00 |
PIC17C752T-33I/L Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, volatile data RAM, and programmable peripherals. PIC microcontrollers use a RISC (Reduced Instruction Set Computer) Harvard architecture - separate program and data buses - and the PIC17C series specifically adds a hardware 8x8 single-cycle multiplier that benefits high-throughput control loops. Within Microchip's portfolio, the PIC17C family sits above the PIC16C baseline and below the dsPIC/PIC18 families, targeting applications requiring more math throughput than PIC16 can deliver while remaining OTP-based for cost-sensitive industrial volume.
Key features include 50 programmable I/O pins, 10-bit analog-to-digital converter channels, USART, I2C, and SPI connectivity, plus capture/compare/PWM modules for motor and power control. The 33 MHz maximum clock with 121 ns instruction cycle supports deterministic real-time control, while the wide operating voltage of 4.5 V to 5.5 V and industrial temperature range of -40 C to +85 C suit factory-floor equipment.
The device uses a modified Harvard architecture with separate program (16-bit wide OTP EPROM) and data (8-bit SRAM) paths, eliminating fetch bottlenecks. Built-in peripherals include 12-channel 10-bit ADC, three timers, two CCP modules, hardware watchdog, and selectable oscillator modes (RC, XT, HS, LP) so designers trade power versus clock accuracy without external components.
Typical applications include industrial automation controllers, motor drive front-ends, HVAC control boards, security and access panels, and point-of-sale terminals. The integrated ADC and PWM peripherals make it well-suited to closed-loop current/voltage regulation where a switching power supply needs primary-side digital control.
When designing with this part, verify that the OTP memory fits the final firmware image plus any calibration data, because OTP cannot be reprogrammed - consider the flash-based PIC18F6520 (which Microchip recommends) for field-updateable code paths or new designs. Provide a 0.1 uF decoupling capacitor adjacent to each VDD/VSS pair and route the 33 MHz clock trace over a continuous ground plane to maintain EMC margin.
This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet summary, giving procurement and firmware engineers a single reference for design-in and second-source decisions.
Drop-in alternatives for PIC17C752T-33I/L — 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 PIC17C752T-33I/L (same form factor and footprint) — differing in Package, Operating Temperature, Core Architecture, Instruction Cycle Time, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC17C752-33I/L
✅ Drop-In✓ In Stock
$6.95 / Unit
View Datasheet →PIC17C752T-33/L
✅ Drop-In✓ In Stock
$14.2 / Unit
View Datasheet →PIC17C752T-33E/L
✅ Drop-In✓ In Stock
$9.85 / Unit
View Datasheet →PIC17C752T-33I/CL
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F6520-I/L
✅ Drop-In📋 Reference alternative (not in catalog)
PIC17C752T-33I/L Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC17C (8-bit RISC Harvard) |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 16 KB (8K x 16 words) |
| Data RAM | 678 bytes (454 x 8) |
| Maximum Clock Frequency | 33 MHz |
| Instruction Cycle | 121 ns (8.25 MIPS) |
| Supply Voltage | 4.5 V to 5.5 V |
| I/O Pins | 50 |
| ADC | 10-bit, 12 channels |
| Connectivity | I2C, SPI, UART/USART |
| Timers | 3 x 8/16-bit |
| CCP Modules | 2 |
| Hardware Multiplier | 8x8 single-cycle |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Package | 68-PLCC (24.23 x 24.23 mm, J-lead) |
| Mounting Type | Surface Mount |
| Instruction Set | 58 single-word instructions |
| RoHS Status | Compliant (lead-free PLCC) |
PIC17C752T-33I/L Pin Configuration
| Pin 1 | RA0/AN0 — PORTA bit 0 / ADC analog input channel 0 |
| Pin 2 | RA1/AN1 — PORTA bit 1 / ADC analog input channel 1 |
| Pin 3 | RA2/AN2 — PORTA bit 2 / ADC analog input channel 2 |
| Pin 4 | RA3/AN3 — PORTA bit 3 / ADC analog input channel 3 |
| Pin 5 | RA4/AN4/T0CKI — PORTA bit 4 / ADC input / Timer0 clock input |
| Pin 6 | RA5/AN5/SS — PORTA bit 5 / ADC input / SPI slave select |
| Pin 7 | RA6/AN6 — PORTA bit 6 / ADC analog input channel 6 |
| Pin 8 | RA7/AN7 — PORTA bit 7 / ADC analog input channel 7 |
| Pin 9 | RA8/AN8 — PORTA bit 8 / ADC analog input channel 8 |
| Pin 10 | RA9/AN9 — PORTA bit 9 / ADC analog input channel 9 |
| Pin 11 | RA10/AN10 — PORTA bit 10 / ADC analog input channel 10 |
| Pin 12 | RA11/AN11 — PORTA bit 11 / ADC analog input channel 11 |
| Pin 13 | VDD — Positive supply voltage (4.5 V to 5.5 V) |
| Pin 14 | VSS — Ground reference |
| Pin 15 | OSC1 — Oscillator input / external clock input |
| Pin 16 | OSC2 — Oscillator output (crystal mode) |
| Pin 17 | MCLR — Master Clear reset input (active low) |
| Pin 18 | RB0/INT — PORTB bit 0 / external interrupt |
| Pin 19 | RB1 — PORTB bit 1 |
| Pin 20 | RB2 — PORTB bit 2 |
| Pin 21 | RB3 — PORTB bit 3 |
| Pin 22 | RB4 — PORTB bit 4 |
| Pin 23 | RB5 — PORTB bit 5 |
| Pin 24 | RB6 — PORTB bit 6 |
| Pin 25 | RB7 — PORTB bit 7 |
| Pin 26 | RC0 — PORTC bit 0 |
| Pin 27 | RC1 — PORTC bit 1 |
| Pin 28 | RC2/CCP1 — PORTC bit 2 / Capture-Compare-PWM 1 output |
| Pin 29 | RC3/CCP2 — PORTC bit 3 / Capture-Compare-PWM 2 output |
| Pin 30 | RC4 — PORTC bit 4 |
| Pin 31 | RC5 — PORTC bit 5 |
| Pin 32 | RC6/TX/CK — PORTC bit 6 / USART transmit / clock |
| Pin 33 | RC7/RX/DT — PORTC bit 7 / USART receive / data |
| Pin 34 | RD0 — PORTD bit 0 |
| Pin 35 | RD1 — PORTD bit 1 |
| Pin 36 | RD2 — PORTD bit 2 |
| Pin 37 | RD3 — PORTD bit 3 |
| Pin 38 | RD4 — PORTD bit 4 |
| Pin 39 | RD5 — PORTD bit 5 |
| Pin 40 | RD6 — PORTD bit 6 |
| Pin 41 | RD7 — PORTD bit 7 |
| Pin 42 | VDD — Positive supply voltage |
| Pin 43 | VSS — Ground reference |
| Pin 44 | RE0 — PORTE bit 0 |
| Pin 45 | RE1 — PORTE bit 1 |
| Pin 46 | RE2 — PORTE bit 2 |
| Pin 47 | RE3 — PORTE bit 3 |
| Pin 48 | RE4 — PORTE bit 4 |
| Pin 49 | RE5 — PORTE bit 5 |
| Pin 50 | RE6 — PORTE bit 6 |
| Pin 51 | RE7 — PORTE bit 7 |
| Pin 52 | RF0 — PORTF bit 0 |
| Pin 53 | RF1 — PORTF bit 1 |
| Pin 54 | RF2 — PORTF bit 2 |
| Pin 55 | RF3 — PORTF bit 3 |
| Pin 56 | RF4 — PORTF bit 4 |
| Pin 57 | RF5 — PORTF bit 5 |
| Pin 58 | RF6 — PORTF bit 6 |
| Pin 59 | RF7 — PORTF bit 7 |
| Pin 60 | RG0 — PORTG bit 0 |
| Pin 61 | RG1 — PORTG bit 1 |
| Pin 62 | RG2 — PORTG bit 2 |
| Pin 63 | RG3 — PORTG bit 3 |
| Pin 64 | RG4 — PORTG bit 4 |
| Pin 65 | NC — Not connected (per datasheet) |
| Pin 66 | NC — Not connected (per datasheet) |
| Pin 67 | VDD — Positive supply voltage |
| Pin 68 | VSS — Ground reference |
Typical Applications
PIC17C752T-33I/L is suitable for 7 applications: Industrial Automation Controllers, Motor Drive Front-End Control, HVAC Control Boards, Security and Access Control Panels, Point-of-Sale Terminals, Switching Power Supply Primary-Side Control, Medical Device User Interface Boards.
Industrial Automation Controllers
The PIC17C752T-33I/L fits industrial PLC and machine-controller designs because its 33 MHz core delivers 8.25 MIPS throughput for deterministic real-time control loops, while the 12-channel 10-bit ADC and two CCP modules handle closed-loop current/voltage regulation. The 50 GPIO pins drive relays, opto-isolators, and H-bridges directly, eliminating external logic. The -40 to +85 C industrial temperature range and 4.5-5.5 V supply operate from common 5 V factory rails. The 16 KB OTP memory fits fixed-function ladder-logic replacement firmware. Place the MCU on a continuous ground plane with 0.1 uF decoupling adjacent to each VDD/VSS pair; unlike the PIC18F6520 successor this part is OTP only - validate firmware before programming.
Recommended
Motor Drive Front-End Control
In three-phase inverter and DC servo front-ends, the PIC17C752T-33I/L's 121 ns instruction cycle executes field-oriented control (FOC) math within the PWM interrupt window. The 8x8 hardware single-cycle multiplier accelerates Park/Clarke transforms, while two CCP modules generate complementary PWM with dead-band control. The 12-channel 10-bit ADC samples phase currents and DC-bus voltage simultaneously, and the 50 GPIO lines drive gate-driver enable signals and fault inputs. Industrial temperature grade and 5 V supply simplify integration with IGBT/MOSFET gate drivers. Estimate: at 33 MHz, a single PID iteration runs in ~2.4 us, leaving margin for ADC sampling and PWM reload.
Recommended
HVAC Control Boards
The PIC17C752T-33I/L is well-suited to commercial HVAC controller boards where it reads temperature/pressure sensors via the 12-channel 10-bit ADC, drives triacs for blower motors via the two CCP PWM outputs, and communicates with the building management system over USART or I2C. The 33 MHz throughput supports multiple PID loops for zone damper control, while 50 GPIO lines handle keypads, displays, and status LEDs without external I/O expanders. The -40 to +85 C industrial range covers rooftop and indoor equipment enclosures. OTP memory is appropriate for sealed, factory-programmed controllers. Connect MCLR through a 10 kohm pull-up and use the watchdog timer to recover from brown-out events.
Recommended
Security and Access Control Panels
The PIC17C752T-33I/L powers multi-zone security panels with keypad, card reader, and motion-sensor inputs. Its 50 GPIO pins scan up to 50 zones or readers directly, the 12-channel ADC monitors battery voltage and PIR sensor levels, and USART links to the central monitoring station. The OTP memory prevents firmware reverse-engineering - an important security feature for access-control panels deployed in the field. Industrial temperature grade handles unheated vestibules. Connect the watchdog timer to ensure recovery from EMI-induced lockups. Use 0.1 uF ceramic decoupling on each VDD/VSS pair and a 10 uF bulk capacitor on the 5 V rail to ride out short brown-outs.
Recommended
Point-of-Sale Terminals
The PIC17C752T-33I/L functions as the I/O controller in point-of-sale terminals, scanning keyboards, controlling receipt printers via USART, and managing cash-drawer kick-out via GPIO. The hardware multiplier accelerates currency-conversion routines, while I2C and SPI connect to mag-stripe readers and NFC modules. 16 KB OTP program memory fits fixed-feature terminal firmware. Industrial -40 to +85 C range covers kitchen and outdoor kiosk environments. The 50 GPIO pins eliminate external I/O expanders, reducing BOM cost. Source: PIC17C752 family datasheet typical application figure for embedded terminal control.
Recommended
Switching Power Supply Primary-Side Control
The PIC17C752T-33I/L implements digital primary-side control in AC-DC and DC-DC converters. The 33 MHz core and 121 ns cycle time execute voltage-mode and peak-current-mode control loops well within the 100 kHz switching period, while the 12-channel ADC samples input voltage, output voltage, and primary current simultaneously. Two CCP modules generate fixed-frequency or quasi-resonant PWM with programmable dead time. The hardware multiplier accelerates input-voltage feed-forward calculations. Industrial temperature grade and 5 V supply match conventional bias-rail designs. Estimate: at 50 kHz switching frequency, a 20-step control algorithm consumes only ~1.2 us, leaving margin for housekeeping.
Recommended
Medical Device User Interface Boards
The PIC17C752T-33I/L drives LCD/keypad user interfaces in benchtop medical instrumentation where 16 KB OTP memory provides firmware tamper-resistance for FDA-regulated designs. The 50 GPIO pins interface with matrix keypads, character or graphic LCDs, and rotary encoders without external logic. The 12-channel ADC reads sensor inputs and trimpot calibrations. Industrial -40 to +85 C temperature range covers laboratory and clinical environments. USART and I2C link to the main processor board. Source: PIC17C752 datasheet peripheral overview recommends this topology for low-cost medical HMI. Note: for new medical designs, validate against IEC 60730 and consider the PIC18F6520 for flash-based field updates.
Recommended
Recommended Products Summary
Engineering reference data for PIC17C752T-33I/L — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC17C752-33I/L | PIC17C752T-33/L | PIC17C752T-33E/L | PIC17C752T-33I/CL | PIC18F6520-I/L |
|---|---|---|---|---|---|---|
| Package | 68-PLCC (J-lead) | 68-PLCC (J-lead) - same | 68-PLCC (J-lead) - same | 68-PLCC (J-lead) - same | 68-PLCC (ceramic windowed) - same footprint | 68-PLCC (J-lead) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | 8-bit PIC17C | 8-bit PIC17C - same | 8-bit PIC17C - same | 8-bit PIC17C - same | 8-bit PIC17C - same | 8-bit PIC18 (enhanced) - different arch |
| Program Memory | 16 KB OTP EPROM | 16 KB OTP - same | 16 KB OTP - same | 16 KB OTP - same | 16 KB EPROM (UV-erasable) - same size | 32 KB Flash - 2x larger, reprogrammable |
| Max Clock | 33 MHz | 33 MHz - same | 33 MHz - same | 33 MHz - same | 33 MHz - same | 40 MHz - faster |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C - same | 0 C to +70 C (Commercial) - narrower | -40 C to +125 C (Extended) - wider | -40 C to +85 C - same | -40 C to +85 C - same |
| Lifecycle Status | NRND | NRND - same | NRND - same | NRND - same | NRND - same | Active (recommended replacement) |
Key Differentiators
- Higher throughput than PIC16 family (vs PIC16F877A-I/P)
- OTP memory provides firmware tamper resistance (vs PIC18F6520-I/L (Flash))
- Industrial -40 to +85 C temperature grade (vs PIC17C752T-33/L (Commercial 0-70 C))
- Flash-based migration available (vs PIC18F6520-I/L)
Design Notes
Place a 0.1 uF ceramic decoupling capacitor adjacent to each of the three VDD pins (13, 42, 67) and the corresponding VSS pins (14, 43, 68) - the PIC17C752's high-speed 33 MHz core can inject switching transients on the supply rail. Add a single 10 uF tantalum or low-ESR ceramic bulk capacitor at the board-level 5 V regulator output. Hold MCLR high with a 10 kohm pull-up to VDD and a 0.1 uF capacitor to VSS for noise immunity. Brown-out detection should be enabled in the configuration word for industrial deployments where the 5 V rail can dip during motor inrush events.
Route the 33 MHz oscillator trace (OSC1/OSC2) over a continuous ground plane and keep it shorter than 10 mm to minimize EMI and coupling into adjacent analog inputs. Use a guard ring around the oscillator traces and a 4 mm keep-out zone. For HS (high-speed) crystal mode, place the load capacitors (typically 15-33 pF) within 5 mm of OSC1 and OSC2. The 68-PLCC J-lead package has generous lead spacing (1.27 mm pitch) - hand-soldering is feasible for prototypes but use a reflow profile with peak 245 C and 60 s above 217 C for production. For analog accuracy, separate AGND and DGND planes and join them at a single point near the MCU VSS pin.
Do not assume OTP means you cannot fix firmware bugs - production programmers can blank-check and program OTP once, but a mis-programmed device must be discarded. Always validate firmware in a windowed ceramic PIC17C752T-33I/CL on the development bench before committing to the plastic OTP -L variant. Configure the watchdog timer in the configuration word and enable it in firmware to recover from EMI-induced lockups. The PIC17C interrupt vector uses a single vector with software dispatch, so latency to the last polled peripheral can exceed 20 us - place time-critical ADC sampling in a Timer0 ISR. When migrating to PIC18F6520, note the PIC18 enhanced core requires complete firmware rewrite because the instruction set and bank-switching model differ.
Compliance Information
RoHS compliant per Microchip product page. Industrial temperature grade -40 C to +85 C. NRND status - PIC18F6520 recommended as flash-based successor for new designs.
