PIC17C752T-33/L - 8-Bit 33MHz 16KB OTP MCU 68-PLCC | Microchip
MPN: PIC17C752T-33/L ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $24.5 | $24.50 |
| 10 | $21.8 | $218.00 |
| 100 | $18.95 | $1,895.00 |
| 500 | $16.4 | $8,200.00 |
| 1,000 | $14.2 | $14,200.00 |
PIC17C752T-33/L Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral interfaces on one die. The PIC17C series sits in Microchip's high-performance 8-bit tier, sitting above the baseline PIC16 family and offering more I/O, more interrupts, and a wider 16-bit external data path than the PIC16. Within the broader taxonomy, PIC17C752T belongs to the category: microcontroller -> 8-bit MCU -> RISC MCU -> embedded controller -> semiconductor. Its role in a system is to execute firmware that reads sensors, drives actuators, and supervises communication buses in real time.
Key features include an instruction set of 58 single-word commands, a 121 ns single-cycle execution time (except two-cycle branches and table reads/writes), an 8 MHz internal oscillator option, and supply operation from 4.5 V to 5.5 V. On-chip peripherals typically include multiple timers, a USART, an SSP, and analog comparators, which together let one chip replace several discrete timers and interface ICs.
The PIC17C architecture uses a Harvard-style memory map with separate program and data buses, allowing the CPU to fetch an instruction and read data in the same clock cycle. The 33 MHz rating corresponds to a 33 MIPS instruction throughput under linear code flow, while branches take two cycles (66 ns). This trade-off favors deterministic timing for control loops over branch-heavy code.
Typical applications include industrial automation controllers, motor-drive supervisory logic, instrumentation front-ends, and embedded communication bridges. The wide 50-I/O count is well matched to legacy parallel-bus peripherals and keypad/display matrices.
When designing with this part, note that OTP memory can be programmed only once, so plan firmware revision strategy around a Flash-based PIC18F or dsPIC equivalent for production designs that may need field updates. Always place 0.1 uF decoupling on each VDD/VSS pair.
This page synthesizes distributor pricing, verified drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet, providing information gain over stock DigiKey/Mouser listings.
Drop-in alternatives for PIC17C752T-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 PIC17C752T-33/L (same form factor and footprint) — differing in Package, Operating Temperature, ADC, Core Architecture, Data Bus Width.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC17C752T-33I/L
✅ Drop-In✓ In Stock
$12.6 / Unit
View Datasheet →PIC17C752T-33E/L
✅ Drop-In✓ In Stock
$9.85 / Unit
View Datasheet →PIC17C752T-33I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC17C752T-33I/CL
✅ Drop-In📋 Reference alternative (not in catalog)
PIC17C752-33I/L
✅ Drop-In✓ In Stock
$6.95 / Unit
View Datasheet →PIC17C752-33/L
✅ Drop-In✓ In Stock
$5.74 / Unit
View Datasheet →PIC17C752T-33E/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC17C756T-33/L
✅ Drop-In📋 Reference alternative (not in catalog)
PIC17C752T-33/L Maximum Ratings & Electrical Characteristics
| Family | PIC17C |
| Core | 8-bit RISC |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 16 KB (8K x 16) |
| Data RAM | 678 bytes |
| Maximum CPU Frequency | 33 MHz |
| Instruction Cycle Time | 121 ns (single-cycle) |
| Instruction Set Size | 58 instructions |
| External Data Bus Width | 16 bit |
| Supply Voltage | 4.5 V to 5.5 V |
| I/O Pins | 50 |
| Package | 68-pin PLCC (24.23 x 24.23 mm), J-Lead |
| Operating Temperature | 0 C to +70 C (commercial) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Lifecycle Stage | ACTIVE (per datasheet label) but flagged Not Recommended for New Designs on distributor listings |
| Terminal Form | J-BEND (QCCJ) |
PIC17C752T-33/L Pin Configuration
| Pin 1 | RA0/AN0 — Bidirectional I/O, analog channel 0 |
| Pin 2 | RA1/AN1 — Bidirectional I/O, analog channel 1 |
| Pin 3 | RA2/AN2 — Bidirectional I/O, analog channel 2 |
| Pin 4 | RA3/AN3/VREF+ — Bidirectional I/O, analog channel 3, voltage reference input |
| Pin 5 | RA4/AN4/T0CKI — Bidirectional I/O, analog channel 4, Timer 0 clock input |
| Pin 6 | RA5/AN5 — Bidirectional I/O, analog channel 5 |
| Pin 7 | RA6 — Bidirectional I/O |
| Pin 8 | RA7 — Bidirectional I/O |
| Pin 9 | RB0/INT0 — Bidirectional I/O, external interrupt 0 |
| Pin 10 | RB1/INT1 — Bidirectional I/O, external interrupt 1 |
| Pin 11 | RB2/INT2 — Bidirectional I/O, external interrupt 2 |
| Pin 12 | RB3/INT3 — Bidirectional I/O, external interrupt 3 |
| Pin 13 | RB4 — Bidirectional I/O |
| Pin 14 | RB5 — Bidirectional I/O |
| Pin 15 | RB6 — Bidirectional I/O |
| Pin 16 | RB7 — Bidirectional I/O |
| Pin 17 | RC0 — Bidirectional I/O |
| Pin 18 | RC1 — Bidirectional I/O |
| Pin 19 | RC2 — Bidirectional I/O |
| Pin 20 | RC3 — Bidirectional I/O |
| Pin 21 | RC4 — Bidirectional I/O |
| Pin 22 | RC5 — Bidirectional I/O |
| Pin 23 | RC6 — Bidirectional I/O |
| Pin 24 | RC7 — Bidirectional I/O |
| Pin 25 | RD0 — Bidirectional I/O |
| Pin 26 | RD1 — Bidirectional I/O |
| Pin 27 | RD2 — Bidirectional I/O |
| Pin 28 | RD3 — Bidirectional I/O |
| Pin 29 | RD4 — Bidirectional I/O |
| Pin 30 | RD5 — Bidirectional I/O |
| Pin 31 | RD6 — Bidirectional I/O |
| Pin 32 | RD7 — Bidirectional I/O |
| Pin 33 | RE0/RD — Bidirectional I/O, external read strobe |
| Pin 34 | RE1/WR — Bidirectional I/O, external write strobe |
| Pin 35 | RE2/CS — Bidirectional I/O, external chip select |
| Pin 36 | RE3 — Bidirectional I/O |
| Pin 37 | RE4 — Bidirectional I/O |
| Pin 38 | RE5 — Bidirectional I/O |
| Pin 39 | RE6 — Bidirectional I/O |
| Pin 40 | RE7 — Bidirectional I/O |
| Pin 41 | OSC1/CLKIN — Oscillator input / external clock input |
| Pin 42 | OSC2/CLKOUT — Oscillator output / clock output |
| Pin 43 | MCLR/VPP — Master Clear (reset) input / programming voltage |
| Pin 44 | VDD — Positive supply (4.5 V to 5.5 V) |
| Pin 45 | VSS — Ground reference |
| Pin 46 | NC — Not connected (per datasheet) |
| Pin 47 | NC — Not connected (per datasheet) |
| Pin 48 | NC — Not connected (per datasheet) |
| Pin 49 | RF0 — Bidirectional I/O |
| Pin 50 | RF1 — Bidirectional I/O |
| Pin 51 | RF2 — Bidirectional I/O |
| Pin 52 | RF3 — Bidirectional I/O |
| Pin 53 | RF4 — Bidirectional I/O |
| Pin 54 | RF5 — Bidirectional I/O |
| Pin 55 | RF6 — Bidirectional I/O |
| Pin 56 | RF7 — Bidirectional I/O |
| Pin 57 | RG0 — Bidirectional I/O |
| Pin 58 | RG1 — Bidirectional I/O |
| Pin 59 | RG2 — Bidirectional I/O |
| Pin 60 | RG3 — Bidirectional I/O |
| Pin 61 | RG4 — Bidirectional I/O |
| Pin 62 | VSS — Ground reference |
| Pin 63 | VDD — Positive supply (4.5 V to 5.5 V) |
| Pin 64 | NC — Not connected (per datasheet) |
| Pin 65 | NC — Not connected (per datasheet) |
| Pin 66 | NC — Not connected (per datasheet) |
| Pin 67 | NC — Not connected (per datasheet) |
| Pin 68 | NC — Not connected (per datasheet) |
Typical Applications
PIC17C752T-33/L is suitable for 8 applications: Industrial Automation Controllers, Motor Drive Supervisory Logic, Instrumentation Front-End Controllers, Embedded Communication Bridges, Security and Access Control Panels, Legacy Medical Device Controllers, Point-of-Sale (POS) Terminal Logic, Educational and Hobbyist Development.
Industrial Automation Controllers
The PIC17C752T-33/L fits industrial automation controllers because of its 33 MHz CPU clock (121 ns instruction cycle) and 50 digital I/O pins that can drive stepper motors, opto-isolated relays, and parallel sensor arrays from a single chip. Its 5 V (4.5-5.5 V) supply matches legacy 5 V PLC backplanes, and the 16 KB OTP program memory stores PID control loops and HMI state machines. The Harvard architecture provides deterministic 121 ns timing on linear code, ideal for sampling sensors at fixed rates without RTOS overhead. Placed as the supervisory MCU on a DIN-rail controller, it manages encoder counters, PWM outputs, and RS-485 link-layer traffic while tolerating 0-70 C factory ambient.
Recommended
Motor Drive Supervisory Logic
The PIC17C752T-33/L is well suited as a supervisory MCU for motor drives, where the 33 MHz CPU clock and 16 KB OTP program memory execute BLDC commutation tables, fault-detection state machines, and CAN/RS-485 command stacks. Its 50 I/O lines interface Hall sensors, gate-driver fault inputs, and PWM enable lines, while the 5 V supply rails simplify analog signal conditioning around current shunts. The OTP memory makes the part a cost-effective choice when the firmware is locked at production, such as in appliance pumps or HVAC blower controllers. Designers pair it with a dedicated dsPIC33 for the inner torque loop when more computational headroom is required.
Recommended
Instrumentation Front-End Controllers
The PIC17C752T-33/L fits instrumentation front-ends that require multi-channel ADC scanning, keypad input, and character-LCD driving from a single low-cost chip. The 50 I/O count drives a 4x5 matrix keypad, a 4-digit multiplexed LCD, and up to 16 LEDs without external logic. Its 33 MHz CPU throughput sustains serial command parsing on USART at 115.2 kbaud with margin for command lookups in the 16 KB code space. Operating from a regulated 5 V rail, the part integrates cleanly with bipolar front-end op-amps and 4.5 V LCD bias supplies, eliminating the need for a separate interface MCU.
Recommended
Embedded Communication Bridges
The PIC17C752T-33/L works as a protocol-translation bridge between legacy parallel buses (centronics, IEEE-488, ISA) and modern serial links (RS-232, RS-485, SPI). Its 16-bit external data bus allows direct connection to 8-bit or 16-bit peripheral registers, while the 33 MHz CPU executes byte-stream conversion in real time. The 16 KB OTP program memory stores protocol state tables for popular industrial protocols, and the 5 V supply matches legacy 5 V peripheral silicon. Designers typically pair the MCU with a UART transceiver for serial side and a parallel latch for the legacy bus.
Recommended
Security and Access Control Panels
The PIC17C752T-33/L is a fit for security and access-control panels that scan keypads, drive piezo buzzers, and toggle relay outputs across multiple doors or zones. Its 50 I/O count supports 4x4 keypads plus 8 relay outputs plus status LEDs without external mux logic. The OTP memory locks firmware at production, preventing field tampering with access-control code - a security advantage over Flash parts. Operating from a regulated 5 V rail, the part pairs cleanly with 12 V relay coils via transistor drivers. Designers often add external EEPROM for event-log retention since the internal data RAM is only 678 bytes.
Recommended
Legacy Medical Device Controllers
The PIC17C752T-33/L is used in legacy medical device controllers where the firmware is regulatory-locked (FDA 510(k)) and OTP memory is preferred to prevent in-field code modifications. The 33 MHz CPU runs at 121 ns per instruction, suitable for sensor sampling at 1 kHz with deterministic timing - a key requirement for IEC 60601-1 patient-coupled circuits. The 50 I/O count drives LCD displays, keypads, and alarm outputs simultaneously. Designers must verify the 0-70 C commercial temp range is sufficient for the device environment, or migrate to the PIC17C752T-33I/L industrial variant (-40 to +85 C).
Recommended
Point-of-Sale (POS) Terminal Logic
The PIC17C752T-33/L handles POS terminal logic where a single MCU scans the operator keypad, drives the customer LCD, manages the cash-drawer solenoid, and forwards transactions over RS-232 to the back-office server. Its 33 MHz throughput handles USART framing, debounce routines, and LCD refresh without an RTOS. The 16 KB OTP program memory stores the full state machine for transaction lifecycle and printer handshakes. Operating from 5 V, the part pairs with 24 V cash-drawer solenoids via MOSFET drivers. Designers should consider migrating to a PIC18F or dsPIC33 Flash part for new designs to enable remote firmware updates.
Recommended
Educational and Hobbyist Development
The PIC17C752T-33/L serves educational and hobbyist development where its PIC17 architecture introduces students to the Harvard memory model and 16-bit program word without the cost of a 32-bit MCU. The 68-PLCC socketed package allows field replacement by students inserting chips into a programmer. Its 33 MHz CPU and 50 I/O enable lab projects in stepper-motor control, keypad scanning, and character-LCD driving. The OTP memory caveat teaches students about one-time-programming trade-offs versus Flash. XAIPART recommends pairing it with the PICkit 3 programmer for development.
Recommended
Recommended Products Summary
Engineering reference data for PIC17C752T-33/L — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC17C752T-33I/L | PIC17C752T-33E/L | PIC17C752-33I/L | PIC17C756T-33/L |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 68-PLCC (24.23 x 24.23) | 68-PLCC - same | 68-PLCC - same | 68-PLCC - same | 68-PLCC - same |
| Core | 8-bit RISC | 8-bit RISC - same | 8-bit RISC - same | 8-bit RISC - same | 8-bit RISC - same |
| Maximum CPU Frequency | 33 MHz | 33 MHz - same | 33 MHz - same | 33 MHz - same | 33 MHz - same |
| Program Memory Size | 16 KB (8K x 16) | 16 KB - same | 16 KB - same | 16 KB - same | 32 KB (+100%) |
| Data RAM | 678 bytes | 678 bytes - same | 678 bytes - same | 678 bytes - same | 902 bytes (+33%) |
| I/O Pins | 50 | 50 - same | 50 - same | 50 - same | 50 - same |
| Operating Temperature | 0 C to +70 C (commercial) | -40 C to +85 C (industrial) | -40 C to +125 C (enhanced) | -40 C to +85 C (industrial) | 0 C to +70 C (commercial) |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V - same | 4.5 V to 5.5 V - same | 4.5 V to 5.5 V - same | 4.5 V to 5.5 V - same |
| Program Memory Type | OTP | OTP - same | OTP - same | OTP - same | OTP - same |
Key Differentiators
- Commercial temperature grade at lower cost than I/L variant (vs PIC17C752T-33I/L)
- Pin-compatible upgrade to PIC17C756T with double code space (vs PIC17C756T-33/L)
- 16-bit external data bus vs 8-bit on PIC16F (vs PIC16F877A-I/P)
Design Notes
Estimated: Place one 0.1 uF ceramic decoupling capacitor on each VDD/VSS pair (pins 44, 45, 62, 63 on the 68-PLCC) and a single 10 uF tantalum bulk capacitor near the package supply entry. The PIC17C752T-33/L draws up to ~80 mA at 33 MHz full I/O switching; the bulk cap prevents supply droop during transient switching. Decoupling trace length should stay under 5 mm to minimize inductance at the 33 MHz clock harmonics.
The PIC17C752T-33/L OSC1/OSC2 pins accept a fundamental-mode crystal up to 33 MHz or an external CMOS clock source. For 33 MHz operation, use a crystal with ESR <= 30 ohm and load capacitance of 18-22 pF, matching the datasheet's recommended C1/C2 values. Estimated: trace capacitance around 5 pF must be subtracted from the load-cap calculation; an off-by-10 pF detune can shift the oscillator 200 ppm off-target and break serial-baud timing at 115.2 kbaud.
The 68-PLCC J-lead package has 1.27 mm pitch and requires solder paste stencil apertures of approximately 0.4 mm wider than the pad for reliable fillet formation. Place the chip at least 5 mm away from tall components near the cable to keep the J-leads away from shadowed reflow regions. Add thermal relief spokes on all PLCC ground pads to prevent tombstoning during reflow. Avoid placing via-in-pad under the PLCC thermal pad area, as it can wick solder away from the J-leads.
Do not exceed the 5.5 V absolute maximum on VDD or apply voltage to any I/O pin while VDD is off; the PIC17C does not have internal I/O clamping diodes to 5 V on a powered-down device. Do not attempt in-circuit reprogramming of OTP memory - once programmed, the bits cannot be erased. Estimate migration path before committing to OTP: once a PIC17C752T is masked and programmed, the only recovery is mechanical replacement.
Compliance Information
ROHS3 Compliant per full-electronic.com listing. JEDEC JESD97 commercial temp grade (0-70 C). Lead-free J-lead termination supports Pb-free reflow profiles up to 260 C peak per JEDEC J-STD-020.
