PIC16C64AT-04/PT - 8-bit OTP MCU, 3.5KB, 33 I/O, TQFP-44 | Microchip
MPN: PIC16C64AT-04/PT ✗ Cuối đờiPIC16C64AT-04/PT Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, volatile data memory, and programmable I/O peripherals on one silicon die. The PIC16CXX family, announced in the early 1990s, was the first to combine Harvard architecture, RISC instruction set, CMOS process, and OTP program memory, becoming the industry reference for low-cost embedded control. Within the broader taxonomy, this part sits at: PIC16C64A -> PIC16CXX -> PIC16 family -> 8-bit MCU -> microcontroller -> embedded processor -> semiconductor IC. Pin-compatible second sources include PIC16C64A (no A-suffix die revision) and PIC16C642 (lower-pin-count variant).
Key features include 35 single-word instructions, a 14-bit instruction word, an 8-level hardware stack, two 8-bit timer/counters, a Watchdog Timer with on-chip RC oscillator, programmable code protection, an analog comparator, and a synchronous serial port (SSP). The device operates from 4.0 V to 6.0 V over -40 C to +85 C (industrial) or 0 C to +70 C (commercial).
Architecturally, the PIC16C64A uses a RISC pipeline with a two-stage instruction fetch/execute, two hardware register banks for fast context save, and a wide variety of interrupt sources. The T-suffix indicates tape-and-reel packaging, the -04 indicates the 4 MHz speed grade, and the /PT suffix denotes the 44-pin TQFP package.
Typical applications include industrial control, sensor interfacing, low-power embedded systems, automotive in-cabin modules, and legacy equipment maintenance. Choose this part when you need to sustain production of a proven design rather than redesign around newer silicon.
When laying out the PCB, follow Microchip appnote AN585 for TQFP-44 land pattern recommendations. Decouple each VDD/VSS pair with a 100 nF ceramic capacitor placed within 5 mm of the pins, and assign MCLR/VPP to a dedicated test point for in-circuit programming.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet, supporting rapid sourcing decisions for production and field replacement.
Bộ thay thế dễ dàng lắp đặt cho PIC16C64AT-04/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 PIC16C64AT-04/PT (cùng hình factor và footprint) — khác nhau ở Operating Temperature Range, Package, Program Memory Type, Timers, Program Memory Size.
PIC16C64A-04/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C64A-10/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C64A-20/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C64A-04E/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C64A-04I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C64AT-04/PT Tỷ lệ tối đa & tính chất điện
| Product Family | PIC16CXX |
| Core | 8-bit PIC RISC |
| Program Memory Type | OTP (One-Time Programmable EPROM) |
| Program Memory Size | 3.5 KB (2K x 14) |
| RAM Size | 128 x 8 bytes |
| Number of I/O Pins | 33 |
| CPU Speed | 4 MHz (4 MIPS) |
| Instruction Word | 14 bits |
| Hardware Stack | 8 levels |
| Timers | 2 x 8-bit Timer/Counter |
| Watchdog Timer | Yes, with on-chip RC oscillator |
| Analog Comparator | Yes |
| Synchronous Serial Port (SSP) | Yes |
| Supply Voltage (Vcc) | 4.0 V to 6.0 V |
| Khoảng nhiệt độ hoạt động | -40 C to +85 C (industrial) |
| Hộp | 44-pin TQFP (PT), 10x10 mm |
| Kiểu lắp đặt | Surface Mount |
| Speed Grade | -04 (4 MHz) |
| Packaging | Tape and Reel (T-suffix) |
Cấu hình chân PIC16C64AT-04/PT
| Chân 1 | OSC1/CLKIN — Oscillator input / external clock input |
| Chân 2 | RA0 — Port A bit 0 (bidirectional I/O) |
| Chân 3 | RA1 — Port A bit 1 (bidirectional I/O) |
| Chân 4 | RA2 — Port A bit 2 (bidirectional I/O) |
| Chân 5 | RA3 — Port A bit 3 (bidirectional I/O) |
| Chân 6 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| Chân 7 | RA5 — Port A bit 5 (bidirectional I/O) |
| Chân 8 | RE0/RD — Port E bit 0 / parallel slave port read |
| Chân 9 | RE1/WR — Port E bit 1 / parallel slave port write |
| Chân 10 | RE2/CS — Port E bit 2 / parallel slave port chip select |
| Chân 11 | VDD — Positive supply voltage (+5V) |
| Chân 12 | VSS — Ground reference |
| Chân 13 | OSC2/CLKOUT — Oscillator output / clock output |
| Chân 14 | RC0 — Port C bit 0 (bidirectional I/O) |
| Chân 15 | RC1 — Port C bit 1 (bidirectional I/O) |
| Chân 16 | RC2 — Port C bit 2 (bidirectional I/O) |
| Chân 17 | RC3 — Port C bit 3 (bidirectional I/O) |
| Chân 18 | RD0 — Port D bit 0 (bidirectional I/O) |
| Chân 19 | RD1 — Port D bit 1 (bidirectional I/O) |
| Chân 20 | RD2 — Port D bit 2 (bidirectional I/O) |
| Chân 21 | RD3 — Port D bit 3 (bidirectional I/O) |
| Chân 22 | RC4 — Port C bit 4 (bidirectional I/O) |
| Chân 23 | RC5 — Port C bit 5 (bidirectional I/O) |
| Chân 24 | RC6 — Port C bit 6 (bidirectional I/O) |
| Chân 25 | RC7 — Port C bit 7 (bidirectional I/O) |
| Chân 26 | RB0/INT — Port B bit 0 / external interrupt |
| Chân 27 | RB1 — Port B bit 1 (bidirectional I/O) |
| Chân 28 | RB2 — Port B bit 2 (bidirectional I/O) |
| Chân 29 | RB3 — Port B bit 3 (bidirectional I/O) |
| Chân 30 | RB4 — Port B bit 4 (bidirectional I/O) |
| Chân 31 | RB5 — Port B bit 5 (bidirectional I/O) |
| Chân 32 | RB6 — Port B bit 6 (bidirectional I/O) |
| Chân 33 | RB7 — Port B bit 7 (bidirectional I/O) |
| Chân 34 | VSS — Ground reference |
| Chân 35 | VDD — Positive supply voltage (+5V) |
| Chân 36 | RD4 — Port D bit 4 (bidirectional I/O) |
| Chân 37 | RD5 — Port D bit 5 (bidirectional I/O) |
| Chân 38 | RD6 — Port D bit 6 (bidirectional I/O) |
| Chân 39 | RD7 — Port D bit 7 (bidirectional I/O) |
| Chân 40 | VSS — Ground reference |
| Chân 41 | VDD — Positive supply voltage (+5V) |
| Chân 42 | VSS — Ground reference |
| Chân 43 | NC — Not connected (per datasheet) |
| Chân 44 | MCLR/VPP — Master clear reset / programming voltage input |
Ứng dụng tiêu biểu
PIC16C64AT-04/PT phù hợp cho 6 Áp dụngs: Industrial Process Control, Automotive In-Cabin Modules, Sensor Interface and Signal Conditioning, Legacy Equipment Maintenance, Educational and Development Kits, Low-Power Battery-Operated Devices.
Industrial Process Control
The PIC16C64AT-04/PT's 33 digital I/O pins and 4 MIPS CPU fit mid-complexity industrial control tasks including relay driving, sensor multiplexing, and HMI panel scanning. Its Watchdog Timer with on-chip RC oscillator provides autonomous recovery from EMI-induced lockups in factory-floor electrical environments where motors and contactors inject transient noise. The analog comparator enables threshold detection of process variables without an external op-amp, reducing BOM cost in PLC-style I/O modules. The 4.0-6.0 V supply matches 5 V industrial backplanes and accepts unregulated 24 V bus power after a simple linear regulator stage. The 128-byte RAM and 3.5 KB OTP program memory accommodate ladder-logic-style state machines for machine builders maintaining legacy equipment.
Được đề xuất
Automotive In-Cabin Modules
The PIC16C64AT-04/PT is well suited to low-speed automotive body-electronics modules such as seat controllers, mirror actuators, and HVAC blend-door positioning where its 33 I/O and 4 MIPS performance is more than adequate. The industrial -40 C to +85 C temperature rating covers most in-cabin thermal environments; for under-hood applications the PIC16C64A-04E/PT variant extends to +125 C. The OTP memory model provides security against unauthorized firmware readout - important for Tier-1 suppliers protecting OEM-specific calibration data. The synchronous serial port (SSP) supports SPI communication with sensor ASICs and EEPROM memory devices commonly used in body controllers. The Watchdog Timer prevents module lockup during cranking transients and load-dump events common in 12 V automotive electrical systems.
Được đề xuất
Sensor Interface and Signal Conditioning
The PIC16C64AT-04/PT's analog comparator and 33 I/O make it an effective front-end controller for sensor arrays requiring periodic polling, threshold detection, and digital I/O expansion. The on-chip comparator monitors analog signals against an internal bandgap reference without external op-amps, while the SSP module interfaces with SPI-output sensors and EEPROM/FRAM memory devices for calibration storage. The 4 MHz CPU supports averaging algorithms at kHz sample rates typical of thermocouple, RTD, and strain-gauge signal chains. Industrial temperature rating and OTP-based code protection suit field-deployed instrumentation where firmware IP and tamper resistance matter. The part is widely used in legacy OEM sensor transmitters and flow meters where redesign qualification would be cost-prohibitive.
Được đề xuất
Legacy Equipment Maintenance
PIC16C64AT-04/PT remains in active demand as a maintenance-of-stock part for legacy OEM equipment whose field-deployed fleet spans 10-20 years. Industrial users holding certified designs cannot easily migrate to flash-based MCUs without re-qualifying their products under ISO 9001 and customer-specific change-control processes. The PIC16C64A family shares the same instruction set as PIC16F877A in most cases, but pinout and SFR mapping differences require re-validation. Third-party independent distributors maintain traceable inventory for known-good units. Use this part to bridge production runs of legacy products where redesign is on the roadmap but qualification is multi-year.
Được đề xuất
Educational and Development Kits
The PIC16C64AT-04/PT is featured in legacy Microchip development tools and university curricula that teach 8-bit MCU fundamentals using the PIC16C6X instruction set as a reference architecture. Its simple RISC pipeline, 35-instruction set, and Harvard architecture make it an ideal teaching vehicle. The OTP memory model illustrates one-time-programmable security concepts still relevant for ASIC bring-up and ASIC emulation platforms. The 44-pin TQFP-44 with 33 I/O exposes ample peripherals for student projects involving PWM, timer, comparator, and serial port experimentation. Many existing lab kits and reference designs from the late 1990s and early 2000s use this exact MPN, sustaining niche educational demand.
Được đề xuất
Low-Power Battery-Operated Devices
The PIC16C64AT-04/PT's CMOS process and 5 V operating voltage suit battery-powered applications drawing under 10 mA active and microamps in sleep mode when properly configured. Its Watchdog Timer can wake the device from sleep at programmed intervals, eliminating continuous CPU operation. The 33 I/O can drive low-side MOSFET switches for solenoid and motor control in portable equipment. The OTP memory prevents in-field firmware tampering for safety-critical applications such as medical devices and security hardware where the end user must not modify behavior. The 4 MHz CPU supports basic protocol stacks like 1-Wire and I2C bit-banging for sensor and memory peripherals.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C64AT-04/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 | PIC16C64A-04/PT | PIC16C64A-10/PT | PIC16C64A-20/PT | PIC16C64A-04E/PT | PIC16C64A-04I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin TQFP (PT) | 44-pin TQFP (PT) - same | 44-pin TQFP (PT) - same | 44-pin TQFP (PT) - same | 44-pin TQFP (PT) - same | 44-pin TQFP (PT) - same |
| CPU Speed | 4 MHz | 4 MHz | 10 MHz | 20 MHz | 4 MHz | 4 MHz |
| Program Memory | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP |
| RAM Size | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| Number of I/O | 33 | 33 | 33 | 33 | 33 | 33 |
| Supply Voltage | 4.0 V to 6.0 V | 4.0 V to 6.0 V | 4.0 V to 6.0 V | 4.5 V to 5.5 V | 4.0 V to 6.0 V | 4.0 V to 6.0 V |
| Operating Temperature | -40 C to +85 C | 0 C to +70 C | 0 C to +70 C | 0 C to +70 C | -40 C to +125 C | -40 C to +85 C |
| Packaging Form | Tape and Reel | Tray | Tray | Tray | Tray | Tray |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Bảo phân biệt quan trọng
- Identical silicon across the entire PIC16C64A family (vsPIC16C64A-04/PT)
- 33 I/O pins in a compact 44-pin TQFP (vsPIC16F877A-I/PT)
- Industrial temperature grade available on -04I suffix (vsPIC16C64A-04/PT (commercial 0C to +70C))
Ghi chú thiết kế
Decouple each VDD/VSS pair (there are four on the 44-pin TQFP) with a 100 nF ceramic capacitor placed within 5 mm of the IC pins. The multiple VDD pins are not internally bonded on the PIC16C64A silicon die - each must be externally powered for proper I/O driver operation. For battery applications, add a bulk 10 uF tantalum or aluminum polymer capacitor near the VDD pins to handle transient current demands during I/O switching.
The PIC16C64A silicon has documented anomalies in the Synchronous Serial Port (SSP) module per Microchip silicon errata - review device doc before designing SPI/I2C slave applications. In production programming, ensure MCLR/VPP rises to the proper VH level (typically 13V nominal) within the datasheet-specified rise time, otherwise OTP cells may program incorrectly. Use Microchip's approved programming algorithm only - third-party programmers may damage the EPROM cells.
For the 44-pin TQFP with 0.8 mm pitch, follow IPC-7351 land pattern guidelines: pad dimensions of 0.45 mm x 1.6 mm with a 0.4 mm pitch. Apply solder paste using a 0.15 mm thick stainless steel stencil with apertures reduced by 10-20% from the land pattern to prevent solder bridging on the fine-pitch leads. Place the crystal oscillator within 5 mm of OSC1 and OSC2 to minimize parasitic capacitance, and guard the traces with a ground ring to suppress EMI.
Route the MCLR/VPP trace away from high-noise signal lines and provide a dedicated test point for in-circuit programming access. If using an external reset supervisor, ensure the reset signal meets the minimum pulse width requirement (typically 2 instruction cycles minimum) to avoid incomplete resets. Route the OSC1/OSC2 traces symmetrically with matched lengths to maintain duty cycle accuracy on the internal clock.
Thông tin tuân thủ
PIC16C64AT-04/PT is non-RoHS due to OTP EPROM process and lead-frame termination finish used at original release. The -04E and -04I suffix variants may have different compliance profiles - consult Microchip product environmental reports. Not AEC-Q100 qualified for automotive use despite industrial temperature grade.