PIC16C77T-04I/PT - 8-bit OTP MCU, 14KB, 4MHz, TQFP-44 | Microchip
MPN: PIC16C77T-04I/PT ⚠ آخرین فرصت خریدPIC16C77T-04I/PT نمای کلی
A PIC microcontroller (Peripheral Interface Controller) is a RISC-based embedded computing device integrating a CPU core, non-volatile program memory, RAM, peripheral set (timers, ADC, communication ports), and I/O into a single IC. Within the Microchip taxonomy, PIC MCUs are organized into families (PIC10/12/14/16/18/24/32) by core width, instruction set and peripheral count; the PIC16C series sits in the legacy OTP/EPROM mid-range tier that pre-dates the flash-based PIC16F generation. The PIC16C77 is the 14KB-memory member of the PIC16C7X line with on-board 8-bit ADC.
Key features of the PIC16C77T-04I/PT include a Harvard RISC architecture with 14-bit instructions, hardware multiplier-free ALU executing most instructions in a single 4 MHz cycle, an integrated 8-channel/10-bit (or 12-bit on the 16C77) analog-to-digital converter, two capture/compare/PWM modules, a USART, an SSP/SPI/I2C port, a watchdog timer, brown-out reset, and power-on reset, plus five 8/16-bit timers for total peripheral flexibility.
The architecture relies on EPROM-based code storage which makes the part suited to mature production runs where reprogramming is not expected; the wide 4.0 V to 6.0 V supply range and -40 °C to +85 °C industrial operating band suit factory-floor controllers. Compared with the flash-based PIC16F877 equivalent, the PIC16C77 offers OTP code protection but requires UV-erase windows or windowless-OTP programming strategies in production.
Typical applications include industrial automation (sensor conditioning + ADC), consumer appliance controllers, automotive body and chassis subsystems, embedded control with analog front ends, and legacy designs requiring EPROM code security. Industrial designers choose it where deterministic single-cycle execution, mature toolchain support (MPLAB + Hi-Tech C), and EPROM code protection outweigh the lack of in-circuit reprogramming.
A core design consideration is OTP code security versus the higher cost-per-bit of EPROM versus flash: design firmware must be fully validated before burn, and an emergency code-change strategy requires replacement stock. Layout tip: keep analog and digital ground returns separated under the 44-TQFP, place the AVdd/Vdd decoupling pair within 5 mm of the pins, and respect the ADC acquisition-time (Tacq) formula to avoid sampling-channel errors.
This page consolidates distributor pricing, drop-in compatible same-package alternatives and practical design notes not found in the manufacturer datasheet, giving procurement and engineering a single decision-ready reference.
جایگزین‌های drop-in برای PIC16C77T-04I/PT — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای PIC16C77T-04I/PT (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Core Architecture, Package, Serial Interfaces, Timers, ADC.
PIC16C77-04I/PT
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
PIC16F877A-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC16F877-04I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC16C74B-04I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC16C77-04/PT
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشدهبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC16C77-04I/PQ
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشدهبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC16C77T-04I/PT حداکثر مقادیر مجاز و مشخصات الکتریکی
| Core Architecture | PIC 8-bit RISC (Harvard) |
| Program Memory Type | OTP EPROM (14-bit instructions) |
| Program Memory Size | 14 KB (8K x 14 words) |
| RAM Size | 368 bytes |
| CPU Speed (Max) | 4 MHz instruction rate |
| Number of I/O Pins | 33 |
| بسته‌بندی / کیس | 44-TQFP (10x10 mm) |
| نوع نصب | Surface Mount |
| Supply Voltage (Vdd) | 4.0 V to 6.0 V |
| دمای کاری | -40 °C to +85 °C (Industrial) |
| Timers | 5 (Timer0, Timer1, Timer2, WDT, RTC) |
| Capture/Compare/PWM | 2 CCP modules |
| Communication | USART (SCI), SSP/SPI, I2C |
| Peripherals | BOR, POR, WDT |
| Tape & Reel | Yes (TR suffix) |
پیکربندی پین PIC16C77T-04I/PT
| پین 1 | OSC1/CLKIN — Oscillator input / external clock input |
| پین 2 | OSC2/CLKOUT — Oscillator output / clock out |
| پین 3 | MCLR/VPP — Master clear (reset) / programming voltage |
| پین 4 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| پین 5 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| پین 6 | RA2/AN2 — PORTA bit 2 / analog input 2 |
| پین 7 | RA3/AN3/VREF- — PORTA bit 3 / analog input 3 / ADC VREF- |
| پین 8 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| پین 9 | RA5/AN4/SS — PORTA bit 5 / analog input 4 / SPI slave select |
| پین 10 | VSS — Ground reference |
| پین 11 | VDD — Positive supply voltage (4.0 V to 6.0 V) |
| پین 12 | RB0/INT — PORTB bit 0 / external interrupt |
| پین 13 | RB1 — PORTB bit 1 |
| پین 14 | RB2 — PORTB bit 2 |
| پین 15 | RB3/PGM — PORTB bit 3 / low-voltage programming |
| پین 16 | RB4 — PORTB bit 4 |
| پین 17 | RB5 — PORTB bit 5 |
| پین 18 | RB6/PGC — PORTB bit 6 / ICSP clock |
| پین 19 | RB7/PGD — PORTB bit 7 / ICSP data |
| پین 20 | VSS — Ground reference |
| پین 21 | VDD — Positive supply voltage |
| پین 22 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 output / clock input |
| پین 23 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 osc input / CCP2 |
| پین 24 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM1 |
| پین 25 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| پین 26 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| پین 27 | RC5/SDO — PORTC bit 5 / SPI data out |
| پین 28 | RC6/TX/CK — PORTC bit 6 / USART TX / clock |
| پین 29 | RC7/RX/DT — PORTC bit 7 / USART RX / data |
| پین 30 | VSS — Ground reference |
| پین 31 | VDD — Positive supply voltage |
| پین 32 | RD0/PSP0 — PORTD bit 0 / parallel slave port bit 0 |
| پین 33 | RD1/PSP1 — PORTD bit 1 / parallel slave port bit 1 |
| پین 34 | RD2/PSP2 — PORTD bit 2 / parallel slave port bit 2 |
| پین 35 | RD3/PSP3 — PORTD bit 3 / parallel slave port bit 3 |
| پین 36 | RD4/PSP4 — PORTD bit 4 / parallel slave port bit 4 |
| پین 37 | RD5/PSP5 — PORTD bit 5 / parallel slave port bit 5 |
| پین 38 | RD6/PSP6 — PORTD bit 6 / parallel slave port bit 6 |
| پین 39 | RD7/PSP7 — PORTD bit 7 / parallel slave port bit 7 |
| پین 40 | VSS — Ground reference |
| پین 41 | VDD — Positive supply voltage |
| پین 42 | RE0/RD/AN5 — PORTE bit 0 / read control / analog input 5 |
| پین 43 | RE1/WR/AN6 — PORTE bit 1 / write control / analog input 6 |
| پین 44 | RE2/CS/AN7 — PORTE bit 2 / chip select / analog input 7 |
کاربردهای معمول
PIC16C77T-04I/PT مناسب است برای 6 کاربردs: Industrial Automation Controllers, Consumer Appliance Control Boards, Automotive Body and Chassis Modules, Sensor Conditioning and Data Acquisition, Embedded Control with Analog Front End, Legacy Embedded Designs Requiring EPROM Security.
Industrial Automation Controllers
The PIC16C77T-04I/PT fits industrial automation controllers because its 33 digital I/O lines and integrated 8-channel ADC handle sensor conditioning, switch debouncing, and actuator drive in one chip. Its 4.0–6.0 V supply matches 5 V PLC backplanes and 24 V-derived intermediate rails, while the -40 °C to +85 °C industrial temperature range tolerates factory-floor enclosures. The Harvard RISC core executes a single-cycle instruction at 4 MHz (1 MIPS), sufficient for PID loops, HMI scanning and Modbus-style serial protocols. The on-chip USART, SSP and CCP peripherals enable multi-axis motion, while OTP EPROM provides firmware IP protection against cloning. Unlike flash MCUs, OTP enforces one-shot validation but rewards designers with high-density 14-bit instruction storage and decades-long data retention.
پیشنهادی
Consumer Appliance Control Boards
In consumer appliance control boards (washing machines, dishwashers, microwave ovens, HVAC indoor units), the PIC16C77T-04I/PT integrates ADC plus digital I/O plus USART, eliminating separate display drivers and analog front ends. The OTP EPROM secures proprietary calibration data and menu state machines against casual copying, which matters for brand differentiation. Its 4 MHz MIPS throughput comfortably runs user-interface debouncing, fuzzy-logic temperature control, and triac zero-crossing timing on 50/60 Hz mains. The 5 V operation and TQFP-44 footprint allow low-cost 2-layer PCB designs that fit behind keypad overlays, and the PIC16C7X long-term support from Microchip means appliance platforms can run for decades without tooling changes.
پیشنهادی
Automotive Body and Chassis Modules
The PIC16C77T-04I/PT is well-suited to automotive body and chassis modules (door modules, seat controllers, instrument clusters, lighting drivers) where 5 V operation, 33 I/O, ADC channels and USART suffice for sensor and actuator fan-out. Its industrial -40 °C to +85 °C temperature rating covers cabin environments, though under-hood designs should migrate to AEC-Q100-qualified parts. The 4 MIPS core handles CAN-friendly software UART bridging, PWM headlamp leveling, and brushed-motor PWM control via the two CCP modules. OTP EPROM secures vehicle-specific calibration tables and immobilizer-related constants. Compared with PIC18 alternatives, the PIC16C77 trades flash reprogrammability for stronger code protection and a smaller die, reducing per-unit cost in high-volume body-electronics production.
پیشنهادی
Sensor Conditioning and Data Acquisition
For 8-channel data-acquisition front ends, the PIC16C77T-04I/PT integrates an 8-channel ADC, three timers and a USART, replacing discrete analog multiplexers, sample-hold ICs and UART chips. The 14-bit instruction width and Harvard bus allow deterministic ADC acquisition sequences tied to Timer1, which is critical when sampling thermocouples, load cells or strain gauges at fixed intervals. Its 5 V supply rails drive ratiometric bridges directly, while the 33 I/O drive LCD segment multiplexing without additional logic. OTP EPROM locks calibration coefficients per channel, important for NIST-traceable measurement instruments. Designers typically pair the MCU with op-amp front ends (e.g. MCP6S21) and a precision voltage reference (e.g. MCP1541) for 16-bit effective systems.
پیشنهادی
Embedded Control with Analog Front End
In motor-control and analog-front-end designs, the PIC16C77T-04I/PT delivers simultaneous ADC sampling and PWM drive through its CCP modules and Timer2 base, enabling brushed DC, stepper and small BLDC control loops at 4 MIPS. The 33 I/O can drive optoisolators, gate drivers and encoder inputs in a single-chip solution. OTP EPROM stores motor calibration curves and acceleration profiles, preventing field-tampering of safety limits. The 5 V operation aligns with most industrial gate-driver optocouplers. Compared with dsPIC parts, the PIC16C77 trades DSP performance for ultra-low cost and decades-long availability, making it ideal for cost-sensitive fan, pump, valve and HVAC damper actuators that must run reliably for 10+ year product lifetimes.
پیشنهادی
Legacy Embedded Designs Requiring EPROM Security
Designers maintaining long-lifecycle products with EPROM-protected firmware — military radios, secure payment terminals, certified metering systems — choose the PIC16C77T-04I/PT for its OTP EPROM code protection that flash parts cannot easily match. UV-erase windowed parts and one-time-programmed parts create a tamper-resistant code region that is hard to reverse-engineer without destructive analysis. The 14-bit instruction width supports dense fixed-point libraries needed for legacy crypto, metering math and signaling stacks. Because Microchip continues to ship PIC16C7X for legacy aerospace/defense contracts, the part is still procurable from authorized channels for the foreseeable future, even though new commercial designs should migrate to PIC16F877A-I/PT or PIC18F equivalents.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای PIC16C77T-04I/PT — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | PIC16C77-04I/PT | PIC16F877A-I/PT | PIC16F877-04I/PT | PIC16C74B-04I/PT |
|---|---|---|---|---|---|
| Package | 44-TQFP (10x10) | 44-TQFP (10x10) | 44-TQFP (10x10) | 44-TQFP (10x10) | 44-TQFP (10x10) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | PIC 8-bit RISC | PIC 8-bit RISC | PIC 8-bit RISC | PIC 8-bit RISC | PIC 8-bit RISC |
| Program Memory | 14 KB OTP EPROM | 14 KB OTP EPROM | 14 KB Flash | 14 KB Flash | 4 KB OTP EPROM |
| Max CPU Speed | 4 MHz | 4 MHz | 20 MHz | 4 MHz | 4 MHz |
| RAM Size | 368 bytes | 368 bytes | 368 bytes | 368 bytes | 192 bytes |
| I/O Pins | 33 | 33 | 33 | 33 | 33 |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C |
| Code Protection | OTP EPROM | OTP EPROM | Flash fuses | Flash fuses | OTP EPROM |
| Reprogrammable | No (one-time) | No (one-time) | Yes (in-system flash) | Yes (in-system flash) | No (one-time) |
تفاوت‌های کلیدی
- Drop-in OTP EPROM code security unavailable on flash MCUs (در مقابلPIC16F877A-I/PT)
- Wider 4.0–6.0 V supply tolerance than typical 3.3 V-class flash MCUs (در مقابلATMEGA8535L-8AU)
- 33 I/O with parallel slave port on PORTD/PORTE (در مقابلPIC16C74B-04I/PT)
یادداشت‌های طراحی
Place AVdd/Vdd decoupling capacitors (typically 100 nF ceramic + 10 µF tantalum) within 5 mm of every Vdd/Vss pair on the 44-TQFP, with vias to a low-impedance ground plane. The PIC16C77T-04I/PT has four Vdd pins and four Vss pins spread across the package; if any pair is left undecoupled, ADC channel cross-talk increases by 5–10 LSB. Separate analog (AVdd) and digital grounds must join at a single point beneath the package. Keep the MCLR pull-up within 5 mm of pin 3 and provide a 100 nF cap to Vdd for noise immunity. The 44-TQFP (10x10 mm) thermal pad is not exposed, so a standard 4-layer FR-4 board with a continuous ground plane is adequate; no special thermal relief is required at 4 MHz operation.
The PIC16C77T-04I/PT ADC requires careful acquisition-time (Tacq) budgeting per Microchip datasheet 30211E: Tacq = TAMP + TC + TCOFF = 2 µs + (TAD × 1/2) + recommended 1.6 µs minimum at 5 V. Failing to meet Tacq degrades ADC accuracy from the rated 10-bit performance to as low as 7 bits. Route analog traces (AN0–AN7) away from digital switching lines such as RC6/RC7 USART and RB6/RB7 ICSP; place a 100 Ω series resistor at the analog source if the source impedance exceeds 2.5 kΩ to prevent sampling-glitch errors. For ratiometric measurements, drive the sensor excitation from the same Vdd as the MCU to cancel Vdd drift.
Do not assume in-system reprogrammability: the PIC16C77T-04I/PT is OTP EPROM, so any firmware bug after the OTP burn requires physical part replacement. Always build with a PIC16F877A-I/PT socket-compatible prototype to validate firmware, then transition to PIC16C77 for the OTP production run. Watch the configuration bits (CONFIG1/CONFIG2) carefully: oscillator selection must match XT (crystal ≤ 4 MHz) or HS (high-speed crystal > 4 MHz) and the WDT must be disabled in safety-critical loops or serviced regularly. Brown-out reset (BOR) must be enabled for any 5 V industrial deployment because the wide 4.0–6.0 V supply range is prone to sags on inductive loads.
Route the 4 MHz crystal traces (OSC1 pin 1, OSC2 pin 2) symmetrically with matching lengths under 10 mm, surrounded by a ground guard ring to suppress radiated emissions. The ICSP pins (RB6/PGC, RB7/PGD, MCLR/VPP) must be brought out to an in-circuit programming header; place a 4.7 kΩ pull-up on MCLR and a Schottky diode clamp to Vdd if production-line inrush voltages exceed 13 V on the programmer pin. Keep the parallel slave port (RD0–RD7, RE0–RE2) traces short and matched if PSP mode is used, otherwise treat them as general-purpose I/O and route alongside other PORTD signals.
اطلاعات انطباق
PIC16C77T-04I/PT is a legacy OTP EPROM part originally released before RoHS standardization. RoHS/REACH compliance depends on the specific date code; verify with distributor documentation. Not AEC-Q100 qualified for automotive under-hood use. Modern RoHS-compliant flash alternative is PIC16F877A-I/PT.