PIC17C762-16/PT - 8-bit OTP MCU, 16KB EPROM, 66 I/O TQFP-80 | Microchip
MPN: PIC17C762-16/PT ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $14.5 | $14.50 |
| 10 | $13.2 | $132.00 |
| 100 | $11.85 | $1,185.00 |
| 500 | $10.5 | $5,250.00 |
| 1,000 | $9.25 | $9,250.00 |
PIC17C762-16/PT Overview
An OTP microcontroller (One-Time-Programmable microcontroller) is a non-volatile program-memory MCU whose EPROM cells can be written exactly once during production programming, then retain their bit pattern for the lifetime of the part. OTP sits in the microcontroller taxonomy between mask-ROM MCUs (cheapest, programmed at the fab) and flash MCUs (rewritable for field upgrades); OTP MCUs are favored for high-volume mature products where firmware is stable and production tooling costs favor factory programming. Within Microchip's lineup, PIC17C762 belongs to the PIC17C family of 8-bit RISC microcontrollers, which in turn sits above PIC16C and below PIC18 in performance and peripheral count.
Key features of the PIC17C762-16/PT include its high-performance Harvard RISC architecture with only 58 single-word instructions, single-cycle instruction execution (except program branches and table reads/writes which are two-cycle), a wide 4.5 V to 5.5 V supply range, an external clock input up to 33 MHz, and built-in brown-out / power-on reset and watchdog timer. The internal 10-bit A/D converter supports multiple channels for mixed-signal embedded designs. Industrial-grade operation is supported through the -40C to +85C commercial/industrial range (per the PT suffix family). The 80-pin TQFP package exposes 66 I/O pins, leaving 14 pins for power, ground, oscillator, MCLR, and programming functions.
Architecturally, the PIC17C762 separates program memory (16 KB OTP EPROM) from data memory (678 bytes RAM + 16-level hardware stack), allowing the 16-bit instruction word to coexist with an 8-bit data path. The single-cycle hardware multiplier accelerates arithmetic operations common in motor control and instrumentation, while the peripheral set supports both event-driven (timer/capture) and communications (USART) workloads.
Typical applications include industrial control panels, motor drive controllers, instrumentation front-ends, sensor conditioning with on-chip A/D, low-cost data acquisition terminals, and any high-volume embedded design that benefits from one-time factory programming of stable firmware. Compared with newer flash-based PIC18F8520, the PIC17C762-16/PT targets production runs where firmware stability eliminates the need for field re-programmability.
When designing with this part, note that OTP memory cannot be erased or rewritten; firmware bugs are unrecoverable in the field. Ensure a stable, well-regulated 5 V supply and follow Microchip's PIC17C programming specifications for in-circuit or socket programming using the ICSP interface. A newer recommended device per Microchip is the PIC18F8520, which adds flash memory and improved peripherals while remaining software-compatible at the architectural level.
Drop-in alternatives for PIC17C762-16/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 PIC17C762-16/PT (same form factor and footprint) — differing in Core Architecture, Package, Data Bus Width, Instruction Cycle Time, Maximum Clock Frequency.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC17C762-16I/PT
✅ Drop-In✓ In Stock
$10.05 / Unit
View Datasheet →PIC17C762-16E/PT
✅ Drop-In✓ In Stock
$10.4 / Unit
View Datasheet →PIC17C762T-16I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC17C762T-16/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC17C762-16E/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$10.4 / Unit
View Datasheet →PIC17C762-16/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC Harvard |
| Program Memory Type | OTP EPROM (One-Time-Programmable) |
| Program Memory Size | 16 KB (16 K x 16 words) |
| RAM Size | 678 bytes |
| Data Bus Width | 16-bit (instruction) / 8-bit (data) |
| Maximum Clock Frequency | 33 MHz (external) |
| Instruction Cycle Time | 121 ns (single-cycle for most instructions) |
| MIPS Performance | 8.25 MIPS |
| Supply Voltage (Vdd) | 4.5 V to 5.5 V |
| Number of I/O Pins | 66 |
| A/D Converter | 10-bit, multi-channel |
| Hardware Multiplier | 8-bit x 8-bit, single-cycle |
| Number of Instructions | 58 single-word instructions |
| Package | TQFP-80 (PT), 12x12 mm, surface mount |
| Operating Temperature Range | 0C to +70C (Commercial) |
| Mounting Type | Surface Mount (Gull Wing) |
| RoHS Status | Contains lead (pre-RoHS process); non-compliant for new designs |
PIC17C762-16/PT 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 | RA4/AN4 — Port A bit 4 / analog input 4 |
| Pin 6 | RA5/AN5 — Port A bit 5 / analog input 5 |
| Pin 7 | AVDD — Analog supply voltage |
| Pin 8 | AVSS — Analog ground |
| Pin 9 | OSC1 — Oscillator input |
| Pin 10 | OSC2 — Oscillator output |
| Pin 11 | MCLR — Master clear reset (active low) |
| Pin 12 | VPP — Programming voltage input |
| Pin 13 | RB0/INT — Port B bit 0 / external interrupt |
| 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 | VDD — Digital supply voltage (+5V) |
| Pin 22 | VSS — Digital ground |
| Pin 23 | RC0 — Port C bit 0 |
| Pin 24 | RC1 — Port C bit 1 |
| Pin 25 | RC2 — Port C bit 2 |
| Pin 26 | RC3 — Port C bit 3 |
| Pin 27 | RC4 — Port C bit 4 |
| Pin 28 | RC5 — Port C bit 5 |
| Pin 29 | RC6 — Port C bit 6 |
| Pin 30 | RC7 — Port C bit 7 |
| 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 | VDD — Digital supply voltage (+5V) |
| Pin 40 | VSS — Digital ground |
| Pin 41 | RE0 — Port E bit 0 |
| Pin 42 | RE1 — Port E bit 1 |
| Pin 43 | RE2 — Port E bit 2 |
| Pin 44 | RE3 — Port E bit 3 |
| Pin 45 | RE4 — Port E bit 4 |
| Pin 46 | RE5 — Port E bit 5 |
| Pin 47 | RE6 — Port E bit 6 |
| Pin 48 | RE7 — Port E bit 7 |
| 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 | VDD — Digital supply voltage (+5V) |
| Pin 58 | VSS — Digital ground |
| Pin 59 | RG0 — Port G bit 0 |
| Pin 60 | RG1 — Port G bit 1 |
| Pin 61 | RG2 — Port G bit 2 |
| Pin 62 | RG3 — Port G bit 3 |
| Pin 63 | RG4 — Port G bit 4 |
| Pin 64 | TX/CK — USART transmit / clock |
| Pin 65 | RX/DT — USART receive / data |
| Pin 66 | T0CKI — Timer 0 clock input |
| Pin 67 | T1CKI — Timer 1 clock input |
| Pin 68 | CCP1 — Capture/Compare/PWM 1 |
| Pin 69 | CCP2 — Capture/Compare/PWM 2 |
| Pin 70 | SS — SPI slave select |
| Pin 71 | SDO — SPI data out |
| Pin 72 | SDI — SPI data in |
| Pin 73 | SCK — SPI clock |
| Pin 74 | VDD — Digital supply voltage (+5V) |
| Pin 75 | VSS — Digital ground |
| Pin 76 | RH0 — Port H bit 0 |
| Pin 77 | RH1 — Port H bit 1 |
| Pin 78 | RH2 — Port H bit 2 |
| Pin 79 | RH3 — Port H bit 3 |
| Pin 80 | RH4 — Port H bit 4 |
Typical Applications
PIC17C762-16/PT is suitable for 6 applications: Industrial Control Panels, Motor Drive Controllers, Sensor Instrumentation Front-Ends, Data Acquisition Terminals, Security and Access Control Systems, White Goods and Appliance Controllers.
Industrial Control Panels
The PIC17C762-16/PT is well suited to industrial control panels where stable, mature firmware drives keypads, LED indicators, relay outputs, and discrete I/O. Its 66 I/O pins handle multiple HMI inputs and outputs without external expanders, while the 10-bit on-chip ADC reads analog setpoints (temperature, pressure, voltage) directly. The Harvard RISC core's deterministic single-cycle instruction execution (121 ns) ensures predictable response times for real-time control loops, and the 4.5-5.5 V supply matches common industrial 5 V backplanes. OTP memory guarantees firmware integrity against accidental field reprogramming in deployed equipment.
Recommended
Motor Drive Controllers
The PIC17C762-16/PT's 8-bit single-cycle hardware multiplier accelerates the PID and vector-control math used in brushed and stepper motor controllers, while its 33 MHz clock delivers 8.25 MIPS for real-time commutation. The capture/compare/PWM peripherals generate motor-drive waveforms with low software overhead, and the 10-bit ADC samples motor current/voltage feedback in synchronous timing. OTP memory suits high-volume motor products with stable firmware. For higher-performance BLDC/FOC drives, consider migrating to dsPIC33E devices, but for cost-sensitive brushed/stepper applications the PIC17C762 remains a strong fit.
Recommended
Sensor Instrumentation Front-Ends
Instrumentation front-ends benefit from the PIC17C762-16/PT's on-chip 10-bit ADC and 66 I/O pins, which allow direct connection to multiple analog sensors (thermocouples via amplifier, RTDs, strain gauges) and digital sensors. The hardware multiplier speeds scaling and linearization calculations, while the 678-byte RAM accommodates moving-average filters and calibration tables. The deterministic 121 ns instruction cycle supports consistent sampling intervals essential for measurement accuracy. OTP memory locks calibrated firmware into production units.
Recommended
Data Acquisition Terminals
Low-cost data acquisition terminals use the PIC17C762-16/PT to read multiple analog channels via the 10-bit ADC, buffer samples in 678-byte RAM, and transmit results over USART to a host PC or PLC. The 16 KB OTP program memory holds acquisition routines, calibration coefficients, and a simple command interpreter. Industrial-grade I/E variants operate over -40C to +85C/+125C for factory-floor deployment. For higher-channel-count applications, the PIC17C762's 66 I/O enable direct multiplexing without external logic.
Recommended
Security and Access Control Systems
The PIC17C762-16/PT is a fit for security keypads, RFID readers, and access-control panels where its 66 I/O pins drive 4x4 matrix keypads, status LEDs, and door-lock relays, while the on-chip ADC monitors backup battery voltage. OTP memory prevents firmware tampering and unauthorized modification of access-control logic. The Harvard architecture's deterministic execution ensures consistent keypad debounce timing and reliable USART communication with the central controller. The commercial temperature grade suits indoor installations.
Recommended
White Goods and Appliance Controllers
Washing machines, dishwashers, ovens, and other white goods use the PIC17C762-16/PT as the main controller, leveraging 66 I/O pins to drive 7-segment displays, control panel keypads, triac-fired heater outputs, and motor relays. The 10-bit ADC reads water-level, temperature, and motor-current sensors for closed-loop control. The Harvard RISC core's deterministic execution ensures safe appliance sequencing, and OTP memory locks appliance firmware against field modification. The 33 MHz clock provides responsive user-interface update rates.
Recommended
Recommended Products Summary
Engineering reference data for PIC17C762-16/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC17C762-16I/PT | PIC17C762-16E/PT | PIC17C762T-16I/PT | PIC17C762T-16/PT |
|---|---|---|---|---|---|
| Package | TQFP-80 (PT) | TQFP-80 (PT) - same | TQFP-80 (PT) - same | TQFP-80 (PT) - same | TQFP-80 (PT) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory Type | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM |
| Program Memory Size | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| RAM Size | 678 bytes | 678 bytes | 678 bytes | 678 bytes | 678 bytes |
| Operating Temperature | 0C to +70C | -40C to +85C | -40C to +125C | -40C to +85C | 0C to +70C |
| Maximum Clock | 33 MHz | 33 MHz | 33 MHz | 33 MHz | 33 MHz |
| Number of I/O Pins | 66 | 66 | 66 | 66 | 66 |
| A/D Converter | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Key Differentiators
- Highest pin count and I/O count in the PIC17C family for panel/control designs (vs PIC17C756A-16I/PT)
- Industrial and extended temperature variants available with same die (vs PIC16LF877A-I/PT)
- Mature 8-bit architecture with extensive legacy code base (vs PIC18F8520 (recommended migration))
Design Notes
PIC17C762-16/PT uses OTP (One-Time-Programmable) EPROM, not flash memory. Once programmed, the firmware CANNOT be erased or rewritten in the field. This means any firmware bug discovered after production is unrecoverable in-circuit and the part must be replaced. Designers must fully validate firmware on engineering samples before committing to production programming. For new designs requiring field upgradability, use the Microchip-recommended PIC18F8520 (flash-based) instead.
PIC17C762-16/PT requires a regulated 4.5 V to 5.5 V supply with adequate decoupling. Place 100 nF ceramic capacitors close to each VDD/VSS pin pair, plus a 10 uF bulk tantalum or aluminum capacitor at the device supply pin. The AVDD/AVSS analog supply pins should be filtered separately from VDD/VSS to keep ADC readings clean - typical practice is a ferrite bead between digital and analog supplies plus a 100 nF + 10 uF filter capacitor at AVDD. In-circuit Serial Programming (ICSP) requires the VPP pin to be driven to ~13V during programming.
Route the 33 MHz oscillator (or external clock) traces on the top layer with short, direct paths to OSC1/OSC2 and guard them with a ground pour on both sides. Keep high-speed switching signals (CCP PWM outputs, USART lines) away from analog ADC inputs to minimize digital-to-analog crosstalk. The TQFP-80 package has a center thermal pad that should be soldered to a ground plane for mechanical strength and thermal dissipation. Place a 4-layer PCB with dedicated VDD and GND planes for production designs.
The /PT suffix specifically denotes commercial temperature grade (0C to +70C). For industrial applications, use /I/PT or /E/PT suffixes. Always check the operating-temperature marking on the chip against your application's environmental requirements. Mixing commercial parts into industrial designs is a common reliability failure that is often diagnosed only after field failures occur. Also verify pin 1 orientation - the TQFP-80 dot/notch indicator must be correctly aligned to avoid reversed mounting.
Compliance Information
PIC17C762-16/PT was released before RoHS lead-free mandates were in force and uses lead-containing solder finish. Not RoHS compliant; not suitable for new designs requiring RoHS. AEC-Q100 automotive qualification not available. Reach compliant per standard Microchip declarations.
