PIC17LC762-08/PT - 8-bit OTP MCU, 16KB, 66 I/O, TQFP-80 | Microchip
MPN: PIC17LC762-08/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.25 | $112.50 |
| 100 | $9.95 | $995.00 |
| 500 | $8.75 | $4,375.00 |
| 1,000 | $7.5 | $7,500.00 |
PIC17LC762-08/PT Overview
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, an ALU, on-chip program and data memory, and a set of peripheral interfaces. MCUs sit within the broader hierarchy of microprocessors -> microcontrollers -> embedded controllers -> semiconductor ICs. The "PIC" family uses a RISC-based Harvard architecture, where program and data memories are accessed via separate buses to maximize instruction throughput.
The PIC17C/LC family is the highest-pin-count, most peripheral-rich branch of the legacy PIC line, purpose-built for industrial control and instrumentation. Key features include a single-cycle hardware 8-bit multiplier, a 16-bit wide instruction word, 58 single-word instructions, an integrated 10-bit analog-to-digital converter, and commercial temperature grade operation. The OTP memory allows factory or prototype programming while supporting in-field verification before mask ROM commit.
Architecturally, the PIC17LC762 employs a 16-bit instruction bus with separate 8-bit data paths, accelerating arithmetic through the dedicated single-cycle multiply unit. The 10-bit ADC and 66 high-current I/O lines let the device drive relays, keypad scanners, motor phase commutation signals, and analog sensor front-ends directly, simplifying board-level BOM. The LC variant specifies a low-voltage core (2.5V minimum), making it suitable for battery-backed or 3.3V system designs.
Typical applications include industrial automation controllers, instrumentation front-ends, motor control pre-drivers, and legacy embedded-system retrofits where 5V-tolerant, large-I/O-count MCUs remain in demand. It is also used in automotive aftermarket modules, security panels, and HVAC controls. Designers should note that this is a legacy part in active distribution; long-term designs should evaluate newer PIC18 or dsPIC33 alternatives for supply continuity.
When designing with this device, ensure that the OTP programming step is integrated into the manufacturing flow because field re-programmability is not supported. Decouple VDD with at least 0.1 uF ceramic placed within 5 mm of the supply pins, and avoid routing analog and digital signal traces beneath the TQFP thermal pad unless intentionally grounded to the analog ground plane.
Drop-in alternatives for PIC17LC762-08/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 PIC17LC762-08/PT (same form factor and footprint) — differing in Package, Maximum Clock Frequency, Program Memory Type, I/O Pins, Program Memory Size.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC17C762-16/PT
✅ Drop-In✓ In Stock
$9.25 / Unit
View Datasheet →PIC17C762-33I/PT
✅ Drop-In✓ In Stock
$4.85 / Unit
View Datasheet →PIC17C766-16I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$11.5 / Unit
View Datasheet →PIC17C766-16E/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$9.95 / Unit
View Datasheet →PIC17LC756A-08I/PT
✅ Drop-In✓ In Stock
$12.3 / Unit
View Datasheet →PIC17LC752T-08I/PT
✅ Drop-In✓ In Stock
$7.45 / Unit
View Datasheet →PIC17LC762-08/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit RISC (PIC17 Harvard) |
| Instruction Width | 16-bit (single-word) |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 16 KB |
| RAM Size | 678 bytes |
| Maximum Clock Frequency | 33 MHz (8 MHz in -08 speed grade) |
| Instruction Cycle Time | 121 ns (single cycle) |
| Supply Voltage Range | 2.5 V to 5.5 V |
| Number of I/O Pins | 66 |
| A/D Converter | 10-bit, integrated |
| Hardware Multiplier | 8-bit, single-cycle |
| Instruction Set | 58 single-word instructions |
| Package Type | TQFP-80 (PT), 12x12 mm, gull-wing |
| Operating Temperature Grade | Commercial |
| Mounting Type | Surface Mount |
| Terminal Count | 80 |
PIC17LC762-08/PT Pin Configuration
| Pin 1 | OSC1 — Oscillator input |
| Pin 2 | OSC2 — Oscillator output |
| Pin 3 | RA0 — Port A bit 0 / analog input |
| Pin 4 | RA1 — Port A bit 1 / analog input |
| Pin 5 | RA2 — Port A bit 2 / analog input |
| Pin 6 | RA3 — Port A bit 3 / analog input |
| Pin 7 | RA4 — Port A bit 4 / analog input |
| Pin 8 | RA5 — Port A bit 5 / analog input |
| Pin 9 | RA6 — Port A bit 6 / analog input |
| Pin 10 | RA7 — Port A bit 7 / analog input |
| Pin 11 | VSS — Ground |
| Pin 12 | VDD — Positive supply |
| Pin 13 | RB0 — Port B bit 0 |
| Pin 14 | RB1 — Port B bit 1 |
| Pin 15 | RB2 — Port B bit 2 |
| Pin 16 | RB3 — Port B bit 3 |
| Pin 17 | RB4 — Port B bit 4 |
| Pin 18 | RB5 — Port B bit 5 |
| Pin 19 | RB6 — Port B bit 6 |
| Pin 20 | RB7 — Port B bit 7 |
| Pin 21 | RC0 — Port C bit 0 |
| Pin 22 | RC1 — Port C bit 1 |
| Pin 23 | RC2 — Port C bit 2 |
| Pin 24 | RC3 — Port C bit 3 |
| Pin 25 | RC4 — Port C bit 4 |
| Pin 26 | RC5 — Port C bit 5 |
| Pin 27 | RC6 — Port C bit 6 / TX |
| Pin 28 | RC7 — Port C bit 7 / RX |
| Pin 29 | VSS — Ground |
| Pin 30 | VDD — Positive supply |
| Pin 31 | RD0 — Port D bit 0 |
| Pin 32 | RD1 — Port D bit 1 |
| Pin 33 | RD2 — Port D bit 2 |
| Pin 34 | RD3 — Port D bit 3 |
| Pin 35 | RD4 — Port D bit 4 |
| Pin 36 | RD5 — Port D bit 5 |
| Pin 37 | RD6 — Port D bit 6 |
| Pin 38 | RD7 — Port D bit 7 |
| Pin 39 | RE0 — Port E bit 0 |
| Pin 40 | RE1 — Port E bit 1 |
| Pin 41 | RE2 — Port E bit 2 |
| Pin 42 | RE3 — Port E bit 3 |
| Pin 43 | RE4 — Port E bit 4 |
| Pin 44 | RE5 — Port E bit 5 |
| Pin 45 | RE6 — Port E bit 6 |
| Pin 46 | RE7 — Port E bit 7 |
| Pin 47 | VSS — Ground |
| Pin 48 | VDD — Positive supply |
| Pin 49 | RF0 — Port F bit 0 |
| Pin 50 | RF1 — Port F bit 1 |
| Pin 51 | RF2 — Port F bit 2 |
| Pin 52 | RF3 — Port F bit 3 |
| Pin 53 | RF4 — Port F bit 4 |
| Pin 54 | RF5 — Port F bit 5 |
| Pin 55 | RF6 — Port F bit 6 |
| Pin 56 | RF7 — Port F bit 7 |
| Pin 57 | RG0 — Port G bit 0 |
| Pin 58 | RG1 — Port G bit 1 |
| Pin 59 | RG2 — Port G bit 2 |
| Pin 60 | RG3 — Port G bit 3 |
| Pin 61 | RG4 — Port G bit 4 |
| Pin 62 | VSS — Ground |
| Pin 63 | VDD — Positive supply |
| Pin 64 | MCLR — Master clear reset |
| Pin 65 | T0CKI — Timer 0 clock input |
| Pin 66 | INT0 — External interrupt 0 |
| Pin 67 | RX/DT — UART receive / data |
| Pin 68 | TX/CK — UART transmit / clock |
| Pin 69 | AN0 — Analog input 0 |
| Pin 70 | AN1 — Analog input 1 |
| Pin 71 | AN2 — Analog input 2 |
| Pin 72 | AN3 — Analog input 3 |
| Pin 73 | AN4 — Analog input 4 |
| Pin 74 | AN5 — Analog input 5 |
| Pin 75 | AN6 — Analog input 6 |
| Pin 76 | AN7 — Analog input 7 |
| Pin 77 | VREF+ — ADC positive reference |
| Pin 78 | VREF- — ADC negative reference |
| Pin 79 | AVSS — Analog ground |
| Pin 80 | AVDD — Analog supply |
Typical Applications
PIC17LC762-08/PT is suitable for 7 applications: Industrial Automation Controllers, Motor Control Pre-Driver Front End, Legacy Instrumentation Front-End, HVAC Climate Control Panels, Security and Access-Control Panels, Medical Device User Interfaces, Automotive Aftermarket Modules.
Industrial Automation Controllers
The PIC17LC762-08/PT fits industrial automation controllers because its 66 I/O lines and 16 KB OTP memory can drive multiplexed 7-segment displays, accept multiple encoder inputs, and execute deterministic control loops at 121 ns per instruction. The 10-bit ADC samples up to 16 analog channels for thermocouple, pressure, or flow sensor inputs at the 8 MHz clock. Unlike dsPIC33 DSC devices it lacks DSP extensions, but for sub-millisecond PLC scan times the 8-bit core is sufficient. The 2.5V minimum supply also supports 24V industrial bus systems with simple LDO pre-regulation on the control board.
Recommended
Motor Control Pre-Driver Front End
The PIC17LC762-08/PT acts as a BLDC or stepper motor pre-driver controller with its 66 I/O pins driving six gate-driver enable signals plus three Hall-sensor input capture channels. The 10-bit ADC reads back-EMF and shunt-resistor current at up to 8 MHz of ADC clock, while the 8-bit single-cycle hardware multiplier executes PI loop calculations in tens of instruction cycles. Designers should pair it with external gate drivers such as the IR2110 or IRS2003 for the high-current motor phases.
Recommended
Legacy Instrumentation Front-End
The PIC17LC762-08/PT serves as a legacy instrumentation front-end digitizing analog sensor signals via its 10-bit ADC and driving character LCDs, keypads, and RS-232/485 transceivers through 66 available I/O pins. The 121 ns instruction cycle supports 9600-baud UART software bit-banging if no hardware UART is brought out, and the OTP memory stabilizes production firmware for instruments shipped in high volumes. The commercial temperature grade suits laboratory and indoor test equipment rather than outdoor installations.
Recommended
HVAC Climate Control Panels
The PIC17LC762-08/PT powers HVAC wall-mount thermostats and zone controllers where 66 I/O lines scan multiple push-buttons, drive triac-based AC outputs, and read NTC thermistor dividers through the integrated 10-bit ADC. The 2.5V minimum supply enables designs powered from a 24VAC transformer with simple half-wave rectification, while the 5V tolerance allows direct drive of opto-isolated triac drivers. OTP memory locks in calibration constants and prevents field tampering of firmware in commercial building installations.
Recommended
Security and Access-Control Panels
The PIC17LC762-08/PT integrates security-panel logic including keypad scanning, RFID reader UART interfaces, magnetic contact monitoring, and piezo-buzzer control using its 66 I/O pins and hardware UART. The 16 KB program memory holds event-logging routines and PIN-management algorithms, while the 678-byte RAM buffers alarm history between EEPROM and external flash writes. Commercial temperature grade suits indoor security installations; outdoor or vehicle-mounted panels require the PIC17C766-16E/PT extended temperature variant.
Recommended
Medical Device User Interfaces
The PIC17LC762-08/PT controls medical-device front panels such as infusion-pump keypads and bedside-monitor LCD backlights using its 66 I/O pins and 8 MHz / 121 ns instruction throughput. The 10-bit ADC reads potentiometer knobs and battery voltage for low-battery alerts, while OTP memory locks in IEC 62304-compliant firmware versions. Designers targeting FDA-cleared products should pair with the PIC17C766-16E/PT for the extended temperature range and use external watchdog supervisors; full medical certification requires additional compliance documentation not provided by the bare MCU.
Recommended
Automotive Aftermarket Modules
The PIC17LC762-08/PT powers aftermarket automotive modules including gauge clusters, alarm systems, and trailer-light controllers where 66 I/O pins drive multiple LED bargraphs and high-side switches. The 12-bit-equivalent timing resolution at the 121 ns instruction cycle generates accurate PWM for gauge damping, while the 10-bit ADC reads fuel-level and temperature sender inputs. Automotive OEM designs should instead choose AEC-Q100-qualified PIC18 or dsPIC33 devices because the PIC17 commercial-grade part is not AEC-Q100 certified.
Recommended
Recommended Products Summary
Engineering reference data for PIC17LC762-08/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC17C762-16/PT | PIC17C762-33I/PT | PIC17C766-16I/PT | PIC17LC756A-08I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-80 (PT) | TQFP-80 (PT) | TQFP-80 (PT) | TQFP-80 (PT) | TQFP-80 (PT) |
| Architecture | 8-bit PIC17 RISC | 8-bit PIC17 RISC | 8-bit PIC17 RISC | 8-bit PIC17 RISC | 8-bit PIC17 RISC |
| Program Memory | 16 KB OTP | 16 KB OTP | 16 KB OTP | 32 KB OTP | 16 KB OTP |
| Maximum Clock | 8 MHz | 16 MHz | 33 MHz | 16 MHz | 8 MHz |
| Supply Voltage | 2.5 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 | 2.5 V to 5.5 V |
| I/O Pins | 66 | 66 | 66 | 66 | 66 |
| Temperature Grade | Commercial | Commercial | Industrial | Industrial | Industrial |
| RAM | 678 bytes | 678 bytes | 678 bytes | 902 bytes | 678 bytes |
Key Differentiators
- Low-voltage core supports 2.5V to 5.5V while sharing the same TQFP-80 footprint as the PIC17C family (vs PIC17C762-16/PT)
- 66 GPIO and 16-bit instruction word in the 8-bit PIC family, highest pin-count in the PIC17 line (vs PIC17C766-16I/PT)
- Integrated 10-bit ADC eliminates external ADC BOM cost for sensor applications (vs DSPIC33EP64MC504-E/MV)
Design Notes
The PIC17LC762-08/PT requires a clean 2.5V to 5.5V supply with bulk decoupling of 10 uF tantalum within 25 mm of the VDD pins and 0.1 uF ceramic placed within 5 mm of each VDD pin. Because the LC variant supports lower supply voltages than the C variants, ensure the upstream LDO is stable at light loads (some LDOs require 1 mA minimum load current for regulation), or add a 10 kohm bleeder resistor. Independent analog and digital ground planes should join only at the AVSS/AGND pin.
The TQFP-80 package has a center thermal pad that must be soldered to a copper pour of at least 1 square inch for thermal dissipation. Route analog signals (AN0-AN7, VREF+, VREF-) away from the oscillator traces to minimize ADC clock-noise coupling. The MCLR pin requires a 10 kohm pull-up to VDD and a 100 nF capacitor to ground for clean reset during power-up; the PIC17 reset behavior is sensitive to MCLR rise time below 1 microsecond.
A common pitfall is assuming the LC variant supports the same 5V-only peripherals as the C variant - the LC version is specified for 2.5V to 5.5V but IO VIH/VIL thresholds are scaled; verify all driven loads at 3.3V levels. Another pitfall is treating the OTP memory as flash - code is committed during programming and CANNOT be modified after packaging; plan for prototype programming steps before final assembly. Estimated: programming time for full 16 KB OTP is approximately 2-4 seconds per part on a ProMate or equivalent programmer.
Compliance Information
RoHS and REACH compliance per Microchip product declaration. Not AEC-Q100 qualified - for automotive OEM designs use AEC-Q100-qualified dsPIC33 or PIC18 devices. Lead-free, halogen-free, and conflict-mineral compliant per Microchip policy.
