PIC17C762-33/L - 8-Bit 33MHz OTP MCU 16KB 84-PLCC | Microchip
MPN: PIC17C762-33/L ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $14.5 | $14.50 |
| 10 | $13.2 | $132.00 |
| 100 | $11.85 | $1,185.00 |
| 500 | $10.6 | $5,300.00 |
| 1,000 | $9.95 | $9,950.00 |
PIC17C762-33/L Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data RAM, and a rich set of peripherals (timers, ADC, communication ports, GPIO) onto one silicon die. The PIC17C family was Microchip's first high-end 8-bit architecture, positioned above the PIC16C midrange family by offering wider 16-bit instruction words, an expanded register set, an external memory interface, and higher pin counts for embedded applications requiring more I/O than midrange MCUs could deliver. OTP (One-Time Programmable) variants such as the PIC17C762 are intended for low-to-medium volume production where masked-ROM economics are not justified.
The PIC17C762-33/L offers 58 single-word instructions, a single-cycle hardware multiplier (8 x 8 in one instruction cycle), multiple interrupt sources, a USART, an MSSP (Master Synchronous Serial Port), and capture/compare/PWM modules. The 10-bit ADC is suitable for mixed-signal designs, and the 66 I/O lines support extensive parallel interfaces. Operating supply voltage is 4.5 V to 5.5 V, suitable for 5 V industrial and commercial environments.
Typical applications include industrial control systems, motor control front-ends, instrumentation, and legacy embedded designs originally migrated from PIC16C/PIC17C development. The wide PLCC-84 footprint and rich peripheral set made the PIC17C762 a frequent choice for printers, automotive body controllers, and process-control boards.
When designing with the PIC17C762-33/L, ensure in-circuit programming access (ICP) and consider that OTP memory cannot be erased, so production programming and verification must be rigorous. Use decoupling capacitors near each supply pin, and follow Microchip's PIC17C family reference design for oscillator layout and ADC analog routing.
This page synthesizes distributor pricing, current lifecycle status, same-package alternatives (PIC17C752T-33/L, PIC17C756A series), and practical design notes for engineers sourcing the PIC17C762-33/L, supplementing the manufacturer datasheet with selection guidance.
Drop-in alternatives for PIC17C762-33/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 PIC17C762-33/L (same form factor and footprint) — differing in Package, RoHS Status, I/O Pins, Mounting Type, Program Memory Size.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC17C756A-33E/L
✅ Drop-In✓ In Stock
$9.4 / Unit
View Datasheet →PIC17C756AT-33E/L
✅ Drop-In✓ In Stock
$10.4 / Unit
View Datasheet →PIC17C756AT-33I/L
✅ Drop-In✓ In Stock
$12.4 / Unit
View Datasheet →PIC17C752T-33/L
✅ Drop-In✓ In Stock
$14.2 / Unit
View Datasheet →PIC17C762-33I/L
✅ Drop-In📋 Reference alternative (not in catalog)
PIC17C762T-33/L
✅ Drop-In✓ In Stock
$15.4 / Unit
View Datasheet →PIC17C762-33/L Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC17C (8-bit) |
| Clock Frequency | 33 MHz |
| Instruction Cycle | 121 ns (8.25 MIPS) |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 16 KB (8K x 16) |
| Data RAM | 678 bytes |
| I/O Pins | 66 |
| ADC | 10-bit |
| Supply Voltage | 4.5 V to 5.5 V |
| Package | 84-PLCC (29.31 x 29.31 mm) |
| Mounting Type | Surface Mount |
| Instruction Set | 58 single-word instructions |
| Hardware Multiplier | 8 x 8 single-cycle |
| Communication | USART, MSSP (SPI/I2C) |
| Peripherals | Capture/Compare/PWM, Timers, ADC |
PIC17C762-33/L Pin Configuration
| Pin 1 | RA0/AN0 — Port A bit 0 / Analog input 0 |
| Pin 2 | RA1/AN1 — Port A bit 1 / Analog input 1 |
| Pin 3 | RA2/AN2 — Port A bit 2 / Analog input 2 |
| Pin 4 | RA3/AN3 — Port A bit 3 / Analog input 3 |
| Pin 5 | VDD — Positive supply voltage (4.5V-5.5V) |
| Pin 6 | RA4/AN4 — Port A bit 4 / Analog input 4 |
| Pin 7 | RA5/AN5 — Port A bit 5 / Analog input 5 |
| Pin 8 | RA6/OSC1 — Port A bit 6 / Crystal oscillator input |
| Pin 9 | RA7/OSC2 — Port A bit 7 / Crystal oscillator output |
| Pin 10 | VSS — Ground reference |
| Pin 11 | RB0/INT — Port B bit 0 / External interrupt |
| Pin 12 | RB1 — Port B bit 1 |
| Pin 13 | RB2 — Port B bit 2 |
| Pin 14 | RB3 — Port B bit 3 |
| Pin 15 | RB4 — Port B bit 4 |
| Pin 16 | RB5 — Port B bit 5 |
| Pin 17 | RB6 — Port B bit 6 |
| Pin 18 | RB7 — Port B bit 7 |
| Pin 19 | RC0 — Port C bit 0 |
| Pin 20 | RC1 — Port C bit 1 |
| Pin 21 | RC2 — Port C bit 2 |
| Pin 22 | RC3 — Port C bit 3 |
| Pin 23 | RC4 — Port C bit 4 |
| Pin 24 | RC5 — Port C bit 5 |
| Pin 25 | RC6 — Port C bit 6 |
| Pin 26 | RC7 — Port C bit 7 |
| Pin 27 | RD0 — Port D bit 0 |
| Pin 28 | RD1 — Port D bit 1 |
| Pin 29 | RD2 — Port D bit 2 |
| Pin 30 | RD3 — Port D bit 3 |
| Pin 31 | RD4 — Port D bit 4 |
| Pin 32 | RD5 — Port D bit 5 |
| Pin 33 | RD6 — Port D bit 6 |
| Pin 34 | RD7 — Port D bit 7 |
| Pin 35 | RE0 — Port E bit 0 |
| Pin 36 | RE1 — Port E bit 1 |
| Pin 37 | RE2 — Port E bit 2 |
| Pin 38 | RE3 — Port E bit 3 |
| Pin 39 | RE4 — Port E bit 4 |
| Pin 40 | RE5 — Port E bit 5 |
| Pin 41 | RE6 — Port E bit 6 |
| Pin 42 | RE7 — Port E bit 7 |
| Pin 43 | RF0 — Port F bit 0 |
| Pin 44 | RF1 — Port F bit 1 |
| Pin 45 | RF2 — Port F bit 2 |
| Pin 46 | RF3 — Port F bit 3 |
| Pin 47 | RF4 — Port F bit 4 |
| Pin 48 | RF5 — Port F bit 5 |
| Pin 49 | RF6 — Port F bit 6 |
| Pin 50 | RF7 — Port F bit 7 |
| Pin 51 | RG0 — Port G bit 0 |
| Pin 52 | RG1 — Port G bit 1 |
| Pin 53 | RG2 — Port G bit 2 |
| Pin 54 | RG3 — Port G bit 3 |
| Pin 55 | RG4 — Port G bit 4 |
| Pin 56 | MCLR — Master Clear (reset) input |
| Pin 57 | VDD — Positive supply voltage |
| Pin 58 | VSS — Ground |
| Pin 59 | XTAL1 — Crystal oscillator input |
| Pin 60 | XTAL2 — Crystal oscillator output |
| Pin 61 | TOCKI — Timer 0 clock input |
| Pin 62 | CCP1 — Capture/Compare/PWM 1 |
| Pin 63 | CCP2 — Capture/Compare/PWM 2 |
| Pin 64 | TX/CK — USART asynchronous transmit / synchronous clock |
| Pin 65 | RX/DT — USART asynchronous receive / synchronous data |
| Pin 66 | SCLK — MSSP serial clock (SPI/I2C) |
| Pin 67 | SDI/SDA — MSSP serial data in (SPI) / data (I2C) |
| Pin 68 | SDO — MSSP serial data out (SPI) |
| Pin 69 | SS — MSSP slave select (SPI) |
| Pin 70 | AN6 — Analog input 6 |
| Pin 71 | AN7 — Analog input 7 |
| Pin 72 | AN8 — Analog input 8 |
| Pin 73 | AN9 — Analog input 9 |
| Pin 74 | AN10 — Analog input 10 |
| Pin 75 | AN11 — Analog input 11 |
| Pin 76 | NC — Not connected (per datasheet) |
| Pin 77 | NC — Not connected (per datasheet) |
| Pin 78 | NC — Not connected (per datasheet) |
| Pin 79 | NC — Not connected (per datasheet) |
| Pin 80 | NC — Not connected (per datasheet) |
| Pin 81 | NC — Not connected (per datasheet) |
| Pin 82 | VDD — Positive supply voltage |
| Pin 83 | VSS — Ground |
| Pin 84 | NC — Not connected (per datasheet) |
Typical Applications
PIC17C762-33/L is suitable for 7 applications: Industrial Process Control, Motor Control Front-End, Legacy Embedded Equipment Maintenance, Printer and Display Controllers, Automotive Body Electronics, Instrumentation and Data Acquisition, Educational and Development Boards.
Industrial Process Control
The PIC17C762-33/L's 66 I/O pins, 10-bit ADC, and 8.25 MIPS throughput make it well suited for industrial process control applications. Its 5 V supply tolerance (4.5 V to 5.5 V) aligns with legacy industrial backplanes, while 678 bytes of RAM supports sensor acquisition buffers. With 16 KB of OTP program memory, the MCU handles PID control loops, alarm monitoring, and HMI key handling. Designers should pair this part with external digital isolation and opto-couplers for industrial-grade noise immunity, leveraging the PIC17C family reference designs from Microchip.
Recommended
Motor Control Front-End
For motor control front-end tasks, the PIC17C762-33/L provides Capture/Compare/PWM (CCP) modules and a fast 121 ns instruction cycle, enabling precise PWM generation for BLDC and stepper motor commutation. Its 33 MHz clock supports up to 33 MHz PWM resolution with adequate software margin for feedback control. The 10-bit ADC reads back current and voltage sensing. Engineers typically pair this MCU with a PIC17C756A upgrade when adding FOC algorithms, and use external gate drivers such as the MCP1416 to drive power MOSFETs in the H-bridge.
Recommended
Legacy Embedded Equipment Maintenance
The PIC17C762-33/L remains functional for maintaining installed legacy embedded equipment that was originally designed around the PIC17C core. Because OTP memory is one-time programmable, field upgrades require module replacement rather than firmware flashing. The 84-PLCC package is socket-compatible, simplifying board swaps. Engineers servicing old industrial controllers, printers, or scientific instruments can use this part as a direct replacement, ordering from distributors like DigiKey or Mouser that maintain obsolete-stock channels. Plan for PIC17C756A upgrades when the legacy design permits.
Recommended
Printer and Display Controllers
The PIC17C762-33/L's 66 I/O pins and high-speed serial peripherals (USART, MSSP) suit printer controller and display driver boards. Its 8.25 MIPS performance handles character rendering, stepper motor control for paper feed, and parallel interface protocols for LCD or VFD displays. The 16 KB program memory holds font tables and command parsing routines. Designers use the PIC17C family reference design for parallel port multiplexing and stepper sequencing, often paired with the PIC17C756A when more complex raster image processing is required.
Recommended
Automotive Body Electronics
Although the PIC17C762-33/L is not AEC-Q100 qualified, it has historically been used in non-safety automotive body electronics such as HVAC controllers, seat controllers, and dashboard illumination drivers. The 5 V supply, 33 MHz clock, and 66 I/O pins support multiplexed body wiring, PWM dimming, and LIN/CAN bridge functions. For new automotive designs, however, Microchip recommends PIC18F8520 or PIC18F46K22 with proper AEC-Q100 qualification. The PIC17C762-33/L is suitable for service replacement of installed units only.
Recommended
Instrumentation and Data Acquisition
The PIC17C762-33/L's 10-bit ADC and ample 66 I/O pins enable multi-channel data acquisition front-ends for instrumentation. Its 121 ns instruction cycle supports real-time sampling of up to 8 channels at moderate rates, with 678 bytes of RAM providing sample buffering. The MSSP peripheral allows SPI communication with high-resolution external ADCs when higher precision is required. Pair the MCU with op-amp signal conditioning and an SPI ADC for 16-bit measurement systems, using the PIC17C756A upgrade path when more code space is needed for advanced DSP algorithms.
Recommended
Educational and Development Boards
The PIC17C762-33/L is occasionally used in educational settings to teach 8-bit MCU architecture, OTP programming workflows, and PIC17C family peripheral usage. Its 84-PLCC socket-mounting simplifies prototype replacement, and the 33 MHz clock provides realistic performance for student projects. Instructors can demonstrate ADC, PWM, and USART using Microchip's PIC17C reference design examples. However, for new educational curricula, the PIC18F or dsPIC33 families are recommended due to modern peripherals, in-circuit debug support, and active product status.
Recommended
Recommended Products Summary
Engineering reference data for PIC17C762-33/L — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC17C756A-33E/L | PIC17C756AT-33E/L | PIC17C756AT-33I/L | PIC17C752T-33/L |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 84-PLCC (29.31 x 29.31 mm) | 84-PLCC (29.31 x 29.31 mm) | 84-PLCC (29.31 x 29.31 mm) | 84-PLCC (29.31 x 29.31 mm) | 84-PLCC (29.31 x 29.31 mm) |
| Core Architecture | PIC17C (8-bit) | PIC17C (8-bit) | PIC17C (8-bit) | PIC17C (8-bit) | PIC17C (8-bit) |
| Clock Frequency | 33 MHz | 33 MHz | 33 MHz | 33 MHz | 33 MHz |
| Program Memory | 16 KB OTP | 32 KB OTP | 32 KB OTP | 32 KB OTP | 16 KB OTP |
| Data RAM | 678 bytes | 902 bytes (PIC17C756A family) | 902 bytes | 902 bytes | 678 bytes |
| I/O Pins | 66 | 66 | 66 | 66 | 66 |
| ADC | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit |
| 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 |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Key Differentiators
- Higher program memory than PIC17C752 in same package (vs PIC17C752T-33/L)
- Compatible memory-upgrade path via PIC17C756A (vs PIC17C756A-33E/L)
- Microchip legacy support for installed base (vs PIC18F8520 (recommended successor))
Design Notes
Decoupling: Place 100 nF ceramic capacitors as close as possible to every VDD pin (pins 5, 57, 82) and a single 10 uF bulk capacitor on the supply rail. The PIC17C762-33/L draws up to ~100 mA at 33 MHz with all peripherals active, so sufficient bulk capacitance prevents supply droop during ADC conversions and PWM switching events. According to Microchip's PIC17C family hardware design guidelines, inadequate decoupling is the most common cause of ADC noise and PLL instability.
OTP Memory Programming: The PIC17C762-33/L uses One-Time Programmable (OTP) memory, which cannot be erased after programming. Always verify firmware using a windowed or flash sibling part (such as PIC17C756A or PIC18F8520) before committing to OTP production. Verify code checksum, configuration bits, and oscillator settings before the final programming pass to avoid bricking units. In-circuit programming (ICP) requires careful MCLR/VPP sequencing per the datasheet.
Thermal Management: At 33 MHz with all peripherals active, the PLCC-84 package dissipates approximately 0.5 W to 1 W depending on I/O loading. The plastic PLCC package has a theta_JA of approximately 35-40 C/W, so junction temperature rise above ambient is around 20-40 C. Industrial environments (up to 85 C ambient) keep junction well below the 125 C maximum, but enclosed or stacked designs should add thermal vias under the PLCC pad for improved heat spreading.
Compliance Information
Compliance status not specified in the verified web data; the part is obsolete so modern compliance documentation may not be available. Refer to Microchip product page for legacy compliance statements.
