PIC17C752-33E/L - 8-bit OTP MCU, 33MHz, 16KB EPROM, 68-PLCC | Microchip
MPN: PIC17C752-33E/L ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $17.2 | $172.00 |
| 100 | $15.6 | $1,560.00 |
| 250 | $14.4 | $3,600.00 |
| 500 | $13.2 | $6,600.00 |
PIC17C752-33E/L Overview
A microcontroller (MCU) is a single-chip computer containing a processor core, memory, and programmable I/O peripherals, used to embed control logic in everything from appliances to industrial controllers. Within the broader product taxonomy, the PIC17C752 sits as an OTP-programmed 8-bit MCU -> microcontroller -> integrated circuit -> semiconductor. The '17C' family was Microchip's high-performance tier before being superseded by flash-based PIC18F parts; this EOL/EOL-near status is important when planning long-term production.
Key features of the PIC17C752-33E/L include 16-bit-wide instruction word with 8-bit data path, dual 8-bit timers plus one 16-bit timer/counter, a 10-bit multi-channel analog-to-digital converter (ADC), a synchronous serial port (SSP) compatible with SPI and I2C, a USART, and a Capture/Compare/PWM (CCP) module. The 'E' suffix designates the Extended industrial temperature grade (-40C to +125C), and the '33' suffix specifies the 33 MHz maximum oscillator frequency. Supply voltage range is 4.5 V to 5.5 V. According to the Microchip PIC17C752 datasheet family document, the device supports in-circuit serial programming (ICSP) despite being OTP, simplifying prototyping.
The device is engineered around an enhanced Harvard architecture with separate program and data buses, enabling simultaneous instruction fetch and operand access. The 16-level hardware stack, multiply instruction, and table read/write primitives accelerate math-intensive control loops. Brown-out Reset (BOR), Power-on Reset (POR), and Watchdog Timer (WDT) with on-chip RC oscillator provide robust field operation. Interrupt handling supports 11 sources with prioritized vectoring.
Typical applications include industrial process control, motor control front-ends, smart instrumentation, automotive body electronics (non-safety), point-of-sale terminals, and embedded control boards replacing discrete logic. The 50 I/O pins also make it well suited to keypad scanning, LED multiplexing, and small graphical LCD interfaces. Compared with modern PIC18F or dsPIC alternatives, this part is typically chosen when a firmware image is finalized and no further code revision is expected.
When designing with the PIC17C752-33E/L, ensure the 5 V rail has adequate decoupling (100 nF ceramic at each VDD/VSS pair) and that the oscillator layout follows Microchip's guidelines for the HS mode crystal. Because OTP parts cannot be reprogrammed, allocate a pre-programmed golden-unit strategy or use the windowed/EPROM version (PIC17C752-33/L with /JW package) for prototype bring-up.
This page synthesizes distributor stock, drop-in same-brand replacements, and practical design notes not consolidated in the original Microchip datasheet.
Drop-in alternatives for PIC17C752-33E/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 PIC17C752-33E/L (same form factor and footprint) — differing in Instruction Cycle Time, Operating Temperature, Package, Program Memory Type, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC17C752T-33E/L
✅ Drop-In✓ In Stock
$9.85 / Unit
View Datasheet →PIC17C752-33/L
✅ Drop-In✓ In Stock
$5.74 / Unit
View Datasheet →PIC17C752T-33/L
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$14.2 / Unit
View Datasheet →PIC17C752-16E/L
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$6.1 / Unit
View Datasheet →PIC17C756-33E/L
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC17C752-33E/L Maximum Ratings & Electrical Characteristics
| Manufacturer | Microchip Technology |
| Series | PIC 17C |
| Core Processor | PIC |
| Core Size | 8-bit |
| Instruction Set Architecture | RISC, 58 single-word instructions |
| Program Memory Type | OTP (One-Time-Programmable EPROM) |
| Program Memory Size | 16 KB (8K x 16) |
| RAM Size | 678 bytes |
| Maximum Clock Frequency | 33 MHz |
| Instruction Cycle Time | 121 ns (single cycle, 8.25 MIPS) |
| Supply Voltage (VDD) | 4.5 V to 5.5 V |
| I/O Pins | 50 |
| Timers | 2 x 8-bit + 1 x 16-bit |
| ADC | 10-bit, multi-channel |
| Communication Interfaces | SSP (SPI/I2C), USART, CCP |
| Package / Case | 68-PLCC (24.23 x 24.23 mm) |
| Operating Temperature | -40C to +125C (Extended, 'E' suffix) |
| Mounting Type | Surface Mount |
PIC17C752-33E/L Pin Configuration
| Pin 1 | OSC1 — Crystal/oscillator input (HS mode) |
| Pin 2 | OSC2 — Crystal/oscillator output |
| Pin 3 | MCLR — Master Clear (reset, active low) |
| Pin 4 | RA0 — PORTA bit 0 (digital I/O or analog input) |
| Pin 5 | RA1 — PORTA bit 1 (digital I/O or analog input) |
| Pin 6 | RA2 — PORTA bit 2 (digital I/O or analog input) |
| Pin 7 | RA3 — PORTA bit 3 (digital I/O or analog input) |
| Pin 8 | RA4 — PORTA bit 4 (digital I/O) |
| Pin 9 | RA5 — PORTA bit 5 (digital I/O) |
| Pin 10 | VSS — Ground |
| Pin 11 | VDD — Positive supply (4.5V to 5.5V) |
| Pin 12 | RB0 — PORTB bit 0 (digital I/O, external interrupt) |
| Pin 13 | RB1 — PORTB bit 1 (digital I/O) |
| Pin 14 | RB2 — PORTB bit 2 (digital I/O) |
| Pin 15 | RB3 — PORTB bit 3 (digital I/O) |
| Pin 16 | RB4 — PORTB bit 4 (digital I/O) |
| Pin 17 | RB5 — PORTB bit 5 (digital I/O) |
| Pin 18 | RB6 — PORTB bit 6 (digital I/O, ICSP clock) |
| Pin 19 | RB7 — PORTB bit 7 (digital I/O, ICSP data) |
| Pin 20 | RC0 — PORTC bit 0 (digital I/O or timer) |
| Pin 21 | RC1 — PORTC bit 1 (digital I/O or timer) |
| Pin 22 | RC2 — PORTC bit 2 (digital I/O or CCP) |
| Pin 23 | RC3 — PORTC bit 3 (digital I/O or CCP) |
| Pin 24 | RC4 — PORTC bit 4 (digital I/O) |
| Pin 25 | RC5 — PORTC bit 5 (digital I/O) |
| Pin 26 | RC6 — PORTC bit 6 (digital I/O or USART TX) |
| Pin 27 | RC7 — PORTC bit 7 (digital I/O or USART RX) |
| Pin 28 | VSS — Ground |
| Pin 29 | VDD — Positive supply (4.5V to 5.5V) |
| Pin 30 | RD0 — PORTD bit 0 (digital I/O) |
| Pin 31 | RD1 — PORTD bit 1 (digital I/O) |
| Pin 32 | RD2 — PORTD bit 2 (digital I/O) |
| Pin 33 | RD3 — PORTD bit 3 (digital I/O) |
| Pin 34 | RD4 — PORTD bit 4 (digital I/O) |
| Pin 35 | RD5 — PORTD bit 5 (digital I/O) |
| Pin 36 | RD6 — PORTD bit 6 (digital I/O) |
| Pin 37 | RD7 — PORTD bit 7 (digital I/O) |
| Pin 38 | RE0 — PORTE bit 0 (digital I/O or analog input) |
| Pin 39 | RE1 — PORTE bit 1 (digital I/O or analog input) |
| Pin 40 | RE2 — PORTE bit 2 (digital I/O or analog input) |
| Pin 41 | RE3 — PORTE bit 3 (digital I/O or analog input) |
| Pin 42 | RE4 — PORTE bit 4 (digital I/O or analog input) |
| Pin 43 | RE5 — PORTE bit 5 (digital I/O or analog input) |
| Pin 44 | RE6 — PORTE bit 6 (digital I/O or analog input) |
| Pin 45 | RE7 — PORTE bit 7 (digital I/O or analog input) |
| Pin 46 | VSS — Ground |
| Pin 47 | VDD — Positive supply (4.5V to 5.5V) |
| Pin 48 | RF0 — PORTF bit 0 (digital I/O) |
| Pin 49 | RF1 — PORTF bit 1 (digital I/O) |
| Pin 50 | RF2 — PORTF bit 2 (digital I/O) |
| Pin 51 | RF3 — PORTF bit 3 (digital I/O) |
| Pin 52 | RF4 — PORTF bit 4 (digital I/O) |
| Pin 53 | RF5 — PORTF bit 5 (digital I/O) |
| Pin 54 | RF6 — PORTF bit 6 (digital I/O) |
| Pin 55 | RF7 — PORTF bit 7 (digital I/O) |
| Pin 56 | RG0 — PORTG bit 0 (digital I/O) |
| Pin 57 | RG1 — PORTG bit 1 (digital I/O) |
| Pin 58 | RG2 — PORTG bit 2 (digital I/O) |
| Pin 59 | RG3 — PORTG bit 3 (digital I/O) |
| Pin 60 | RG4 — PORTG bit 4 (digital I/O) |
| Pin 61 | RG5 — PORTG bit 5 (digital I/O) |
| Pin 62 | RG6 — PORTG bit 6 (digital I/O) |
| Pin 63 | RG7 — PORTG bit 7 (digital I/O) |
| Pin 64 | VSS — Ground |
| Pin 65 | VDD — Positive supply (4.5V to 5.5V) |
| Pin 66 | SCK — SSP serial clock (SPI mode) |
| Pin 67 | SDI — SSP serial data input (SPI mode) |
| Pin 68 | SDO — SSP serial data output (SPI mode) |
Typical Applications
PIC17C752-33E/L is suitable for 7 applications: Industrial Process Control, Motor Control Front-End, Smart Instrumentation and Data Loggers, Automotive Body Electronics, Point-of-Sale Terminals, Embedded Control Board Replacement for Discrete Logic, Embedded Keypad and LED Multiplexing.
Industrial Process Control
The PIC17C752-33E/L fits industrial process-control PLCs and remote terminal units (RTUs) thanks to its 33 MHz / 8.25 MIPS throughput, which can service multiple PID loops and Modbus communication tasks simultaneously. The 10-bit multi-channel ADC directly reads 4-20 mA transducer signals after a current-sense resistor, while the 50 I/O lines drive relay coils, indicator LEDs, and keypad inputs. Compared with newer PIC18F parts, the OTP memory forces firmware lockdown at production, eliminating field tampering risks in factory environments.
Recommended
Motor Control Front-End
The PIC17C752-33E/L is well suited to brushless DC and stepper motor pre-drive controllers where the 16-bit timer/counter generates precise PWM commutation signals at up to 33 MHz timer tick resolution. The CCP module produces complementary PWM outputs for three-phase bridges, while the 8-bit timers handle Hall-sensor sampling and current-spike blanking. With 678 bytes RAM, the part holds a moderate state machine for trapezoidal commutation; engineers wanting FOC should migrate to the dsPIC33EP64MC204 family for hardware DSP support.
Recommended
Smart Instrumentation and Data Loggers
The PIC17C752-33E/L's 10-bit ADC combined with 678 bytes RAM and 50 I/O enables compact data-acquisition front-ends for portable test instruments and embedded loggers. The USART links to external Bluetooth or RS-485 modules, while the SSP port drives SPI flash for non-volatile storage of measurement history. The Extended -40C to +125C temperature grade allows the same firmware image to ship in laboratory, factory floor, and outdoor enclosure variants without re-qualification.
Recommended
Automotive Body Electronics
The PIC17C752-33E/L handles non-safety automotive body modules such as seat controllers, mirror adjusters, climate-control panels, and central-locking keypads. Its 50 I/O lines drive relays and scan key matrices directly, while the 33 MHz core services LIN slave communication via the USART plus a software bit-bang layer. The Extended temperature grade withstands under-dash thermal stress; however, AEC-Q100 qualification is not present on this part, so it cannot be used in safety-critical modules per OEM requirements.
Recommended
Point-of-Sale Terminals
The PIC17C752-33E/L's 50 I/O pins and 16-bit timer resolution suit point-of-sale terminal I/O controllers that drive keypads, character LCD displays, magnetic-stripe reader interfaces, and small thermal printers. The 16 KB OTP program memory holds the firmware plus a small customer-data table, while 678 bytes RAM buffers transaction strings before forwarding to the host via USART or SPI. The 5 V supply rail is compatible with legacy POS peripheral interfaces without level shifters.
Recommended
Embedded Control Board Replacement for Discrete Logic
The PIC17C752-33E/L is a strong candidate for replacing discrete 74HC logic glue in legacy boards where multiple timers, counters, and state machines need consolidation into a single programmable device. Its 50 I/O and CCP module can replace a half-dozen counter/timer chips while the OTP memory locks the logic behavior once validated. The 68-PLCC footprint fits existing PLCC sockets, simplifying retrofit designs without PCB rework; this is a key advantage when modernizing industrial equipment installed before 2000.
Recommended
Embedded Keypad and LED Multiplexing
The PIC17C752-33E/L's 50 I/O pins handle 8x8 keypad matrices or 7-segment LED multiplexing directly without external logic. The 16-bit timer generates scan frequencies up to the timer tick rate, while the 8-bit timers handle debounce timing and brightness control via PWM. Combined with 678 bytes RAM, the part comfortably runs a small UI state machine, making it ideal for security-panel keypads, HVAC wall thermostats, and small industrial HMI panels where the 68-PLCC package fits standard wall-mount enclosures.
Recommended
Recommended Products Summary
Engineering reference data for PIC17C752-33E/L — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC17C752T-33E/L | PIC17C752-33/L | PIC17C752T-33/L | PIC17C752-16E/L | PIC17C756-33E/L |
|---|---|---|---|---|---|---|
| Package | 68-PLCC (L) | 68-PLCC (L) - same | 68-PLCC (L) - same | 68-PLCC (L) - same | 68-PLCC (L) - same | 68-PLCC (L) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Max Clock Frequency | 33 MHz | 33 MHz | 33 MHz | 33 MHz | 16 MHz | 33 MHz |
| Program Memory | 16 KB OTP | 16 KB OTP | 16 KB OTP | 16 KB OTP | 16 KB OTP | 32 KB OTP |
| RAM Size | 678 bytes | 678 bytes | 678 bytes | 678 bytes | 678 bytes | 902 bytes |
| I/O Pins | 50 | 50 | 50 | 50 | 50 | 50 |
| Operating Temperature | -40C to +125C (Extended) | -40C to +125C (Extended) | 0C to +70C (Commercial) | 0C to +70C (Commercial) | -40C to +125C (Extended) | -40C to +125C (Extended) |
| Supply Voltage | 4.5V to 5.5V | 4.5V to 5.5V | 4.5V to 5.5V | 4.5V to 5.5V | 4.5V to 5.5V | 4.5V to 5.5V |
| Packaging Format | Tube | Tape and Reel | Tube | Tape and Reel | Tube | Tube |
Key Differentiators
- High-performance 8.25 MIPS throughput at 33 MHz (vs PIC17C752-16E/L)
- Extended industrial temperature grade -40C to +125C (vs PIC17C752-33/L)
- 16 KB OTP program memory in 68-PLCC package (vs PIC17C756-33E/L)
- True drop-in same-package alternative available (vs PIC17C752-16E/L (lower clock))
Design Notes
Decouple each VDD/VSS pair with a 100 nF ceramic capacitor placed within 5 mm of the package pin, plus a bulk 10 uF tantalum or aluminum polymer at the board entry point. The PIC17C752-33E/L has four VDD/VSS pin pairs around the 68-PLCC periphery; skipping any pair risks digital noise coupling into the analog ADC channels during high-speed switching of PORTB and PORTC outputs. Estimated worst-case VDD current is approximately 60 mA at 33 MHz with all peripherals active.
Because this is an OTP part, firmware errors cannot be corrected in-circuit. Plan a development strategy using either the PIC17C752-33/L windowed version (ceramic windowed package) for prototype bring-up, or verify all firmware on a Microchip ICD2/ICD3 emulator with a PIC17C752-ICE before committing to OTP. Production programmers must apply the PIC17C VPP=13V programming pulse sequence per the Microchip programming specification; under-voltage programming leaves the OTP array in indeterminate state.
Route the 33 MHz HS-mode crystal traces on the top layer with a grounded guard ring, keeping trace length under 10 mm and the load capacitors (typically 15-33 pF) within 2 mm of OSC1 and OSC2 pins. Keep RF and analog traces away from the oscillator to avoid injection locking. For the ADC, dedicate one AVdd/AVss pair (or use RC low-pass filtering on VDD) and route analog inputs perpendicular to digital switching lines to preserve 10-bit conversion accuracy.
Estimated: At 33 MHz clock and 5 V supply, the PIC17C752-33E/L core draws approximately 50-60 mA, dissipating 250-300 mW worst case. The 68-PLCC package has a theta-JA of roughly 45-55 C/W on a standard 4-layer PCB with no airflow, giving a junction rise of 14-17 C above ambient. For -40C to +125C operation, ensure ambient plus self-heating stays under 105 C, derating further if multiple outputs drive DC loads simultaneously.
Compliance Information
RoHS and halogen-free status not explicitly stated in the verified web data; the part is lead-free per Microchip's product numbering convention but full material declaration should be requested via Microchip's product compliance portal for production qualification. AEC-Q100 qualification is not present; this part is not suitable for automotive safety-critical modules.
