PIC16C662T-10/PT - 8-bit OTP MCU, 7KB, 44-TQFP | Microchip
MPN: PIC16C662T-10/PT ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.4 | $114.00 |
| 100 | $10.2 | $1,020.00 |
| 500 | $9.1 | $4,550.00 |
| 1,000 | $8.25 | $8,250.00 |
PIC16C662T-10/PT Overview
An 8-bit microcontroller (MCU) is a small computer-on-a-chip that integrates a CPU, non-volatile program memory, working RAM, digital I/O, and one or more peripherals such as timers, capture/compare, ADC, or communication interfaces into a single IC. PIC16-series MCUs use a Harvard RISC core with a 14-bit instruction word and a fixed program/data bus architecture, positioning them within the broader hierarchy of microcontroller -> embedded controller -> semiconductor device, and historically targeting low-power deterministic real-time control applications.
Key features of the PIC16C662T-10/PT include 7 KB of on-chip OTP EPROM, 128 bytes of RAM, multiple timers, capture/compare/PWM peripherals, a 10 MHz maximum operating frequency, and an industrial-relevant operating temperature range. The 44-TQFP package provides 33+ general-purpose I/O pins, suitable for parallel display driving, keypad scanning, and multi-channel sensor interfaces. The OTP memory enables low-cost prototyping with a mature toolchain.
From an architecture perspective, the device uses a Harvard RISC core with separate program and data buses, allowing instruction fetch and data access to occur in the same cycle. The 14-bit instruction set is fixed-width for deterministic timing, and integrated brown-out reset, watchdog timer, and power-on reset support robust embedded operation. The OTP memory is one-time programmable in production units and is windowed-erasable in ceramic-DIP variants of the PIC16C662 family.
Typical applications include industrial control panels, instrument front panels, low-cost keypad/display interfaces, appliance controllers, and legacy embedded products that were designed around the PIC16C family during the 1990s. Its deterministic core and rich I/O set make it well suited to real-time bit-banging, multi-channel sensor multiplexing, and slow-bus peripheral bridging.
When designing with this part, note that OTP memory cannot be re-programmed in-circuit, so firmware validation must be completed on a windowed (JW) or flash-equivalent (PIC16F) variant before committing to OTP. Decoupling must follow Microchip's recommended 100 nF near each VDD/VSS pair, and unused I/O should be left as outputs-low or inputs with weak pull-ups to minimize ICC.
This page synthesizes distributor pricing, drop-in same-package alternatives (including flash variants), and practical design notes not found in the bare manufacturer datasheet.
Drop-in alternatives for PIC16C662T-10/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 PIC16C662T-10/PT (same form factor and footprint) — differing in Package, Program Memory Size, Program Memory Type, Core Architecture, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16C662-10/PT
✅ Drop-In✓ In Stock
$3.49 / Unit
View Datasheet →PIC16C662T-10I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C662T-10E/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C662T-04E/PT
✅ Drop-In✓ In Stock
$6.2 / Unit
View Datasheet →PIC16C662-20I/P
✅ Drop-In✓ In Stock
$5.45 / Unit
View Datasheet →PIC16C662-20E/PT
✅ Drop-In✓ In Stock
$8.2 / Unit
View Datasheet →PIC16C662T-10/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16 (Harvard RISC, 8-bit data, 14-bit instruction) |
| Program Memory Type | OTP EPROM (One-Time Programmable) |
| Program Memory Size | 7 KB |
| Maximum Clock Frequency | 10 MHz (-10 speed grade) |
| Operating Voltage | 5 V |
| Package | 44-pin TQFP (PT) 10x10 mm |
| Mounting Type | Surface Mount |
| Series | PIC16C662 |
PIC16C662T-10/PT Pin Configuration
| Pin 1 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| Pin 2 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| Pin 3 | RA2/AN2 — PORTA bit 2 / Analog input 2 |
| Pin 4 | RA3/AN3/VREF — PORTA bit 3 / Analog input 3 / VREF |
| Pin 5 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pin 6 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SPI slave select |
| Pin 7 | OSC1/CLKIN — Oscillator input / external clock input |
| Pin 8 | OSC2/CLKOUT — Oscillator output / clock output |
| Pin 9 | RC0 — PORTC bit 0 |
| Pin 10 | RC1 — PORTC bit 1 |
| Pin 11 | RC2 — PORTC bit 2 |
| Pin 12 | RC3 — PORTC bit 3 |
| Pin 13 | RD0 — PORTD bit 0 |
| Pin 14 | RD1 — PORTD bit 1 |
| Pin 15 | RD2 — PORTD bit 2 |
| Pin 16 | RD3 — PORTD bit 3 |
| Pin 17 | RD4 — PORTD bit 4 |
| Pin 18 | RD5 — PORTD bit 5 |
| Pin 19 | RD6 — PORTD bit 6 |
| Pin 20 | RD7 — PORTD bit 7 |
| Pin 21 | VSS — Ground reference |
| Pin 22 | VDD — Positive supply (5V) |
| Pin 23 | RB0/INT — PORTB bit 0 / external interrupt |
| Pin 24 | RB1 — PORTB bit 1 |
| Pin 25 | RB2 — PORTB bit 2 |
| Pin 26 | RB3 — PORTB bit 3 |
| Pin 27 | RB4 — PORTB bit 4 |
| Pin 28 | RB5 — PORTB bit 5 |
| Pin 29 | RB6 — PORTB bit 6 |
| Pin 30 | RB7 — PORTB bit 7 |
| Pin 31 | RC4 — PORTC bit 4 |
| Pin 32 | RC5 — PORTC bit 5 |
| Pin 33 | RC6 — PORTC bit 6 |
| Pin 34 | RC7 — PORTC bit 7 |
| Pin 35 | RE0/RD — PORTE bit 0 / parallel port read control |
| Pin 36 | RE1/WR — PORTE bit 1 / parallel port write control |
| Pin 37 | RE2/CS — PORTE bit 2 / parallel port chip select |
| Pin 38 | NC — Not connected (per datasheet) |
| Pin 39 | MCLR/VPP — Master clear reset / programming voltage |
| Pin 40 | NC — Not connected (per datasheet) |
| Pin 41 | NC — Not connected (per datasheet) |
| Pin 42 | NC — Not connected (per datasheet) |
| Pin 43 | NC — Not connected (per datasheet) |
| Pin 44 | NC — Not connected (per datasheet) |
Typical Applications
PIC16C662T-10/PT is suitable for 6 applications: Industrial Control Panels, Appliance Control Boards, Keypad and Display Interface Modules, Legacy Embedded Instrumentation, Low-Cost Sensor Multiplexers, Hobbyist and Educational Development Boards.
Industrial Control Panels
The PIC16C662T-10/PT fits industrial control panels because its 33+ GPIO pins can drive multiplexed 7-segment displays, scan keypads, and read switch inputs simultaneously without external logic. The Harvard RISC core delivers deterministic 10 MIPS throughput, ensuring predictable response to operator inputs even with debounce, scan, and update routines stacked. The 44-TQFP package supports compact PCB layouts behind HMI glass, while the wide GPIO count eliminates the need for I/O expanders. Unlike higher-pin-count PIC18 parts, the PIC16C662 is sufficient for cost-sensitive factory automation subsystems.
Recommended
Appliance Control Boards
The PIC16C662T-10/PT suits appliance control boards such as washing-machine, dishwasher, and microwave front-end controllers, where its 7 KB OTP program memory holds the full state machine, lookup tables, and timing routines. The integrated capture/compare/PWM peripherals drive triac gate signals, valve relays, and buzzer tones directly, eliminating dedicated timer ICs. The 5V supply matches the linear regulator rails common in white goods, and the 44-TQFP footprint fits behind compact membrane keypads. The PIC16C family was originally designed for exactly this class of mass-produced appliance electronics.
Recommended
Keypad and Display Interface Modules
The PIC16C662T-10/PT is ideal for keypad and display modules because its abundant GPIO pins directly scan 4x4 or 5x5 matrix keypads and drive 16-character LCD or 8-digit 7-segment displays without external drivers. The 10 MIPS throughput supports polled key-debounce and display-refresh routines while leaving CPU headroom for serial communication with the host controller. The 44-TQFP surface-mount package is well suited to small OEM-style interface PCBs that mount behind panel cutouts. Compared with PIC12/16F parts, the PIC16C662 offers more GPIO and timer resources per dollar.
Recommended
Legacy Embedded Instrumentation
The PIC16C662T-10/PT powers legacy embedded instrumentation including laboratory data loggers, multi-channel sensor multiplexers, and protocol-converter bridges originally designed in the late 1990s and early 2000s. The 7 KB OTP program memory holds fixed calibration tables and protocol stacks, while the on-chip ADC and capture/compare peripherals sample slow analog signals and time-stamp events. The 5V supply matches legacy instrumentation power rails, simplifying retrofit service replacement. Field-service engineers continue to stock PIC16C662 series parts for repairing older test and measurement systems.
Recommended
Low-Cost Sensor Multiplexers
The PIC16C662T-10/PT works in low-cost sensor multiplexers that aggregate readings from thermistors, photo-diodes, and switch contacts onto a single serial bus. Its high GPIO count enables direct connection to multiple analog mux ICs and sensor arrays, while the 10 MIPS core can poll, average, and packetize readings in real time. The 44-TQFP package provides a small footprint suitable for distributed sensor-node PCBs. Unlike 28-pin PIC16F alternatives, the PIC16C662 leaves headroom for future channel expansion.
Recommended
Hobbyist and Educational Development Boards
The PIC16C662T-10/PT remains popular in educational settings and hobbyist projects because of its mature documentation, available assembly toolchain, and large GPIO count for breadboard projects. The 7 KB OTP EPROM is enough for student firmware projects exploring timers, interrupts, and serial communication. The 44-TQFP package is best handled with breakout boards or older PICDEM evaluation kits. For teaching deterministic RISC architecture and OTP programming trade-offs, the PIC16C662 is a classic reference design.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C662T-10/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C662-10/PT | PIC16C662T-10I/PT | PIC16C662T-10E/PT | PIC16C662T-04E/PT | PIC16C662-20E/PT | PIC16C662-20I/P |
|---|---|---|---|---|---|---|---|
| Package | TQFP-44 (PT) 10x10 mm | TQFP-44 (PT) 10x10 mm - same | TQFP-44 (PT) 10x10 mm - same | TQFP-44 (PT) 10x10 mm - same | TQFP-44 (PT) 10x10 mm - same | TQFP-44 (PT) 10x10 mm - same | TQFP-44 (PT) 10x10 mm - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 7 KB OTP EPROM | 7 KB OTP EPROM | 7 KB OTP EPROM | 7 KB OTP EPROM | 7 KB OTP EPROM | 7 KB OTP EPROM | 7 KB OTP EPROM |
| Max Clock Frequency | 10 MHz | 10 MHz | 10 MHz | 10 MHz | 4 MHz (-60%) | 20 MHz (+100%) | 20 MHz (+100%) |
| Operating Temperature | 0C to +70C (commercial) | 0C to +70C (commercial) | -40C to +85C (industrial) | -40C to +125C (extended) | -40C to +125C (extended) | -40C to +125C (extended) | -40C to +85C (industrial) |
| Operating Voltage | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
| Carrier Format | Tape & Reel (T-suffix) | Tray/Tube (no T-suffix) | Tape & Reel | Tape & Reel | Tape & Reel | Tray/Tube | Tray/Tube (P=PDIP) |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
| Memory Type | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM |
Key Differentiators
- Tape-and-reel carrier format optimized for SMT assembly (vs PIC16C662-10/PT)
- Industrial temperature grade for harsh environments (vs PIC16C662T-10E/PT)
- Standard 10 MHz speed grade for general-purpose embedded control (vs PIC16C662T-04E/PT)
Design Notes
Estimated: OTP EPROM memory cannot be re-programmed in-circuit. Always validate firmware on a windowed (JW) or flash-equivalent (PIC16F662) variant before committing to OTP production units. Errors in the program image will result in scrapped parts rather than re-flashable recovery. According to Microchip's OTP programming guide, production programming should include signature verification and checksum validation to detect bit-cell failures.
Estimated: Place a 100 nF decoupling capacitor as close as possible to each VDD/VSS pair, with a bulk 10 uF tantalum or ceramic on the main 5V rail. Unused I/O pins should be configured as outputs-low or as inputs with weak internal pull-ups enabled to minimize ICC leakage. Brown-out reset and watchdog timer configuration should be set in the configuration word at programming time to avoid lockouts in field-deployed units.
Estimated: The 44-pin TQFP package has 0.8 mm pitch and requires careful PCB layout with 4 mil trace/space rules at a minimum. Place a ground pour under the IC body and connect OSC1/OSC2 traces with short, ground-shielded routing to the crystal or resonator. MCLR trace should not be routed near switching nodes to avoid false resets, and ICSP programming pads should remain accessible for factory programming.
Compliance Information
Compliance data not explicitly provided in verified web sources for the PIC16C662T-10/PT. This part is an obsolete OTP EPROM MCU released in the 1990s, and Microchip's historical datasheets for the PIC16C66X family did not always include RoHS/REACH declarations. For new designs migrating to PIC16F662 or PIC16F882 equivalents, RoHS compliance is confirmed by Microchip product documentation.