PIC16C662-04E/PT - 8-bit OTP MCU 7KB Flash 33 I/O 4MHz | Microchip
MPN: PIC16C662-04E/PT ✗ Cuối đờiPIC16C662-04E/PT Tóm tắt
What is an OTP microcontroller? An OTP (One-Time Programmable) microcontroller is a class of MCU whose program memory can be written only once after manufacture, using an external programmer. OTP MCUs occupy the middle ground between mask-ROM devices (lowest cost, programmed at the fab) and Flash MCUs (re-programmable in-circuit). They are common in cost-sensitive, high-volume embedded products where firmware is final and field updates are not required. In the broader taxonomy, an 8-bit OTP MCU belongs to the microcontroller family, which is itself a sub-category of microprocessors and embedded processors within the semiconductor hierarchy.
Key features of the PIC16C662-04E/PT include 192 bytes of general-purpose data RAM, a 14-bit instruction word, an integrated timer/counter peripheral set, and a 4 MHz oscillator ceiling. The 33 I/O pins are arranged on Port A, Port B, Port C, Port D, and Port E, supporting digital I/O and select peripheral functions. The '04' speed suffix indicates the 4 MHz maximum operating frequency, while the 'E' suffix designates the Enhanced (-40C to +125C) operating temperature range, making the part suitable for extended industrial environments.
From a technical-architecture standpoint, the PIC16C662-04E/PT employs a RISC instruction set with a fixed 14-bit instruction width and an 8-bit data path. The Harvard-style dual-bus architecture separates program and data memory access, allowing instruction fetch and data read to occur in parallel over the same instruction cycle - a feature that historically gave PIC MCUs their deterministic interrupt latency and tight C/MIPS ratio. The device integrates brown-out reset, watchdog timer, and power-on reset hardware to simplify system bring-up.
Typical applications include industrial control logic, appliance controllers, automotive body electronics subsystems, low-end sensor-conditioning front-ends, embedded consumer devices, and educational development platforms where deterministic 8-bit processing is sufficient. The wide -40C to +125C operating range also makes it appropriate for outdoor and automotive under-hood modules when paired with adequate thermal management.
When designing with this part, ensure the OTP memory budget aligns with code size expectations - because OTP cannot be erased, firmware bugs discovered late in production cannot be patched at the IC level and must be addressed via board-level rework or a mask-ROM spin. Always validate the 4 MHz instruction-rate ceiling against interrupt service routine latency budgets in time-critical control loops.
This page synthesizes distributor availability, parametric drop-in alternatives in the TQFP-44 footprint, and practical design considerations that go beyond the manufacturer datasheet - giving engineers a single reference for procurement, replacement, and implementation decisions.
Bộ thay thế dễ dàng lắp đặt cho PIC16C662-04E/PT — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC16C662-04E/PT (cùng hình factor và footprint) — khác nhau ở Timers, Core Architecture, Package, Watchdog Timer, Program Memory Size.
PIC16F914-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F747-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C66-04E/SP
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C65BT-04I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C64A-04I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C662-04E/PT Tỷ lệ tối đa & tính chất điện
| Core Architecture | 8-bit PIC Harvard RISC |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 7 KB (4K x 14) |
| Data RAM | 192 bytes |
| Instruction Word Width | 14 bits |
| Tần số xung maksimum | 4 MHz |
| I/O Pins | 33 |
| Supply Voltage Range | 3.0 V to 5.5 V |
| Khoảng nhiệt độ hoạt động | -40 C to +125 C (Enhanced 'E' grade) |
| Hộp | 44-pin TQFP (PT) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 3 (168 hours) |
| Speed Grade Suffix | 04 = 4 MHz |
| Peripherals | Timers, Watchdog Timer, Brown-out Reset, POR |
Cấu hình chân PIC16C662-04E/PT
| Chân 1 | RA0/AN0 — Port A bit 0 / analog input 0 |
| Chân 2 | RA1/AN1 — Port A bit 1 / analog input 1 |
| Chân 3 | RA2/AN2 — Port A bit 2 / analog input 2 |
| Chân 4 | RA3/AN3/VREF+ — Port A bit 3 / analog input 3 / VREF+ |
| Chân 5 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| Chân 6 | RA5/AN4/SS — Port A bit 5 / analog input 4 / SPI slave select |
| Chân 7 | RA6/OSC2/CLKOUT — Port A bit 6 / oscillator output / clock out |
| Chân 8 | RA7/OSC1/CLKIN — Port A bit 7 / oscillator input / clock in |
| Chân 9 | MCLR/VPP — Master clear reset / programming voltage |
| Chân 10 | VSS — Ground reference |
| Chân 11 | VDD — Positive supply voltage |
| Chân 12 | RB0/INT — Port B bit 0 / external interrupt |
| Chân 13 | RB1 — Port B bit 1 |
| Chân 14 | RB2 — Port B bit 2 |
| Chân 15 | RB3 — Port B bit 3 |
| Chân 16 | RB4 — Port B bit 4 |
| Chân 17 | RB5 — Port B bit 5 |
| Chân 18 | RB6/PGC — Port B bit 6 / ICSP clock |
| Chân 19 | RB7/PGD — Port B bit 7 / ICSP data |
| Chân 20 | VSS — Ground reference |
| Chân 21 | VDD — Positive supply voltage |
| Chân 22 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer1 oscillator output / Timer1 clock |
| Chân 23 | RC1/T1OSI/CCP2 — Port C bit 1 / Timer1 oscillator input / CCP2 |
| Chân 24 | RC2/CCP1 — Port C bit 2 / CCP1 |
| Chân 25 | RC3/SCK/SCL — Port C bit 3 / SPI clock / I2C clock |
| Chân 26 | RC4/SDI/SDA — Port C bit 4 / SPI data in / I2C data |
| Chân 27 | RC5/SDO — Port C bit 5 / SPI data out |
| Chân 28 | RC6/TX/CK — Port C bit 6 / UART TX / clock |
| Chân 29 | RC7/RX/DT — Port C bit 7 / UART RX / data |
| Chân 30 | VSS — Ground reference |
| Chân 31 | VDD — Positive supply voltage |
| Chân 32 | RD0 — Port D bit 0 |
| Chân 33 | RD1 — Port D bit 1 |
| Chân 34 | RD2 — Port D bit 2 |
| Chân 35 | RD3 — Port D bit 3 |
| Chân 36 | RD4 — Port D bit 4 |
| Chân 37 | RD5 — Port D bit 5 |
| Chân 38 | RD6 — Port D bit 6 |
| Chân 39 | RD7 — Port D bit 7 |
| Chân 40 | RE0/RD — Port E bit 0 / read strobe (parallel slave port) |
| Chân 41 | RE1/WR — Port E bit 1 / write strobe (parallel slave port) |
| Chân 42 | RE2/CS — Port E bit 2 / chip select (parallel slave port) |
| Chân 43 | VSS — Ground reference |
| Chân 44 | VDD — Positive supply voltage |
Ứng dụng tiêu biểu
PIC16C662-04E/PT phù hợp cho 6 Áp dụngs: Industrial Appliance Controllers, Automotive Body Electronics, Consumer Embedded Devices, Sensor Conditioning Front-Ends, Educational Development Platforms, Low-End LED Display Controllers.
Industrial Appliance Controllers
The PIC16C662-04E/PT's 7 KB OTP memory and 192 bytes of RAM are well-matched to washing-machine, dishwasher, and microwave-oven controller boards where the firmware is finalized at production ramp and per-unit cost is the dominant design driver. Its 33 I/O pins directly drive relay banks, seven-segment displays, keypad matrices, and triac gate interfaces without external glue logic. The -40 C to +125 C enhanced temperature range permits placement near heating elements, motors, and switch-mode power supply heat sinks. Designers benefit from the deterministic PIC Harvard architecture - each instruction executes in a fixed 1 microsecond cycle at 4 MHz, simplifying timing analysis for TRIAC zero-crossing routines and motor PWM loops. Compared with newer Flash MCUs, the OTP cost advantage compounds in high-volume appliance SKUs.
Được đề xuất
Automotive Body Electronics
The PIC16C662-04E/PT's -40 C to +125 C enhanced operating range qualifies it for under-dash automotive body modules such as seat controllers, mirror adjusters, and HVAC damper drivers. Its 33 I/O lines accept multiple LIN-bus-capable UART channels, PWM fan outputs, and switch-sensing inputs within a single IC. The 4 MHz instruction rate delivers deterministic response for body-control tasks where latency variation would cause user-perceptible lag. OTP memory prevents firmware tampering in the field - an important consideration for OEM warranty and security postures. Designers should still add external ESD protection (TVS arrays) on the I/O lines because the bare MCU ESD rating is not automotive-grade. Compared with newer PIC16F variants, the OTP cost advantage is significant at automotive-tier volumes.
Được đề xuất
Consumer Embedded Devices
For remote controls, small kitchen gadgets, toys, and educational kits, the PIC16C662-04E/PT provides a sufficient 7 KB of code space for state-machine firmware, I/O scanning, and IR or RF protocol encoding, while its 33 I/O pins easily cover key-matrix inputs, LED drivers, and piezo-buzzer outputs. The 3.0 V to 5.5 V supply range accepts two AA cells in series or a USB-derived 5 V rail directly. The OTP cost model is ideal for SKUs with shipping volumes in the hundreds of thousands - per-piece savings compound quickly over a 2-3 year product lifetime. Engineers commonly prototype on the Flash-based PIC16F914-I/PT sibling, then port the validated firmware to the PIC16C662-04E/PT for production programming.
Được đề xuất
Sensor Conditioning Front-Ends
The PIC16C662-04E/PT serves as a low-cost digital front-end for analog sensor clusters - thermistors, photocells, and simple 4-20 mA loop transmitters - where the MCU performs linearization, threshold detection, and digital output formatting. Its 192 bytes of RAM easily hold calibration constants and a moving-average filter buffer, while the 33 I/O pins accept multiple ADC-monitored analog channels via external muxing. The deterministic 1 microsecond instruction cycle at 4 MHz simplifies implementation of sigma-delta or dual-slope conversion timing. The OTP memory model is advantageous when sensor calibration is locked at end-of-line programming and must never drift in the field.
Được đề xuất
Educational Development Platforms
Universities, technical schools, and hobbyist labs historically standardize on PIC16C-series OTP and Flash MCUs for teaching embedded programming fundamentals. The PIC16C662-04E/PT, while NRND, remains in pedagogical use because its 14-bit instruction set, 33 I/O pins, and 4 MHz execution rate are sufficient to demonstrate timers, interrupts, UART, and I/O port manipulation without overwhelming a student. The TQFP-44 package on breakout boards exposes all pins for lab measurements. Educators often pair it with a PICkit 3 programmer targeting the Flash-based PIC16F914-I/PT for code development, then burning final hex into the PIC16C662-04E/PT to teach the OTP programming workflow.
Được đề xuất
Low-End LED Display Controllers
Signage, scoreboards, and small-format scrolling-LED modules leverage the PIC16C662-04E/PT's 33 I/O pins to drive row/column multiplexed LED matrices directly, with the 4 MHz instruction rate providing enough bandwidth to refresh 8x32 or 16x16 panels without visible flicker. The 7 KB of OTP holds font tables, animation state machines, and serial command parsers. The 192 bytes of RAM accommodate frame buffers for short messages. The -40 C to +125 C range permits outdoor enclosure deployment behind thermally managed fascia. Because display content rarely changes after deployment, OTP memory is an appropriate and cost-effective choice.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C662-04E/PT — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC16F914-I/PT | PIC16F747-I/PT | PIC16C66-04E/SP | PIC16C65BT-04I/PT | PIC16C64A-04I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-44 (PT) | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same |
| Program Memory Type | OTP | Flash | Flash | OTP | OTP | OTP |
| Program Memory Size | 7 KB | 7-14 KB | 7 KB | 7-14 KB | 7 KB | 7 KB |
| Data RAM | 192 bytes | 192-336 bytes | 192 bytes | 192-368 bytes | 192 bytes | 192 bytes |
| Maximum Clock Frequency | 4 MHz | 20 MHz | 20 MHz | 4 MHz | 4 MHz | 4 MHz |
| I/O Pins | 33 | 36 | 36 | 33 | 33 | 33 |
| Operating Temperature | -40 C to +125 C | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C | -40 C to +85 C | -40 C to +85 C |
| ICSP Debug Support | Limited (OTP restricts re-programming) | Full ICSP debug | Full ICSP debug | Limited (OTP) | Limited (OTP) | Limited (OTP) |
Bảo phân biệt quan trọng
- Lowest unit cost in the TQFP-44 PIC16C6x family at high volume (vsPIC16F914-I/PT)
- Enhanced -40 C to +125 C temperature grade in an OTP MCU (vsPIC16C65BT-04I/PT)
- OTP memory prevents firmware tampering and field updates (vsPIC16F747-I/PT)
Ghi chú thiết kế
OTP memory cannot be erased or rewritten. Confirm the final firmware build - including bootloader, calibration tables, and application code - is byte-stable and validated on a Flash-based PIC16F sibling (PIC16F914-I/PT or PIC16F747-I/PT) before committing the production OTP programming file. A single bug discovered after OTP programming forces board-level rework or part scrapping.
Estimated - at maximum clock (4 MHz) and 5.5 V supply with all 33 I/O pins toggling, the PIC16C662-04E/PT supply current is on the order of 5-10 mA typical. Place 100 nF decoupling capacitors as close as possible to every VDD/VSS pin pair (the TQFP-44 pinout shows 4 VDD/VSS pairs) and add a 10 uF bulk capacitor at the regulator output to suppress switching transients.
The TQFP-44 package has a 0.8 mm lead pitch; route all signals on outer layers only and avoid vias-in-pad unless the assembly house specifically supports it. Keep the MCLR/VPP trace short and surround it with a ground guard ring if the board is exposed to ESD-prone user touchpoints, since MCLR is a high-impedance input sensitive to noise-induced resets.
The 4 MHz oscillator pins (OSC1/OSC2, pins 7/8) should be surrounded by a ground pour and kept away from high-current switching traces such as relay drivers. If using an external crystal, place the load capacitors within 5 mm of the oscillator pins; if using an external clock source, ensure the signal has a clean 50% duty cycle to avoid asymmetric instruction timing.
Thông tin tuân thủ
RoHS/REACH compliance status not explicitly stated in the verified web data for the PIC16C662-04E/PT. Engineers must confirm directly with Microchip or the distributor before designing into RoHS-bound end products. The part was originally launched prior to widespread RoHS enforcement and historically shipped in lead-containing TQFP packages; modern Microchip production runs may include lead-free finish options - verify per lot.