PIC16C67-04/P - 8-Bit 4MHz 14KB OTP MCU 40-PDIP | Microchip
MPN: PIC16C67-04/P β End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $9.27 | $9.27 |
| 10 | $8.45 | $84.50 |
| 100 | $7.62 | $762.00 |
| 500 | $6.95 | $3,475.00 |
| 1,000 | $6.3 | $6,300.00 |
PIC16C67-04/P Overview
What is a PIC16C6X microcontroller? The PIC16C6X family is a low-cost, high-performance, CMOS, fully-static, 8-bit microcontroller series based on Microchip's PIC RISC architecture. Positioned in the taxonomy, it belongs to the PIC16 mid-range family, which sits between the baseline PIC10/12/16 and the enhanced PIC17/18 architectures; within the broader microcontroller -> embedded MCU -> semiconductor hierarchy, these OTP-EPROM devices serve as one-time programmable alternatives to flash-based PIC16F counterparts, preserving pin-for-pin compatibility with the flash variants.
Key features include a Harvard bus, single-cycle instruction execution at 4 MHz, 14 interrupt sources with on-chip peripherals, an 8-bit successive-approximation ADC with up to eight input channels, a USART for serial communication, and a master SSP supporting both SPI and I2C. The 8-level hardware stack and 15 special-function hardware registers are mapped into the data memory map.
The PIC16C67-04/P uses a low-power, high-speed CMOS EPROM/ROM process with a fully static design that allows the clock to be stopped without losing register state. With a 14-bit instruction word, 8-bit data path, and 200 ns instruction cycle at 4 MHz, it achieves roughly 5 MIPS throughput, which historically was sufficient for motor control, instrumentation, and consumer product designs.
Typical applications include industrial control systems, white goods and appliance controllers, automotive body electronics (pre-CAN era), smart sensor nodes, and battery-powered instrumentation where the 1 Β΅A standby current enables long-life operation. Designers chose this part when code lock or OTP security was preferred over flash reprogrammability.
When designing with the PIC16C67-04/P, plan for OTP programming: code must be verified before production programming because OTP cannot be erased. Always provide a decoupling capacitor within 5 mm of VDD/VDD2 pins and reserve a 4-pin ICSP header for production programming.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC16C67-04/P β 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 PIC16C67-04/P (same form factor and footprint) β differing in ADC, Communication Peripherals, Core Architecture, Instruction Cycle Time, Instruction Set.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16C67-10/P
β Drop-Inβ In Stock
$3.34 / Unit
View Datasheet βPIC16C67-20/P
β Drop-Inπ Reference alternative (not in catalog)
PIC16F877A-I/P
β Drop-Inπ Reference alternative (not in catalog)
PIC16F877-04/P
β Drop-Inπ Reference alternative (not in catalog)
PIC16C67-04I/P
β Drop-Inπ Reference alternative (not in catalog)
PIC16F877-20/P
β Drop-Inπ Reference alternative (not in catalog)
PIC16C67-04/P Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16C6X RISC, 8-bit |
| Instruction Set | 35 single-word instructions |
| Instruction Word Size | 14-bit |
| Maximum Clock Frequency | 4 MHz |
| Instruction Cycle Time | 200 ns @ 4 MHz |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 14 KB (8K x 14) |
| Data RAM | 368 bytes |
| Data EEPROM | Not included |
| I/O Pins | 33 |
| Operating Voltage Range | 2.5 V to 6.0 V |
| Typical Current 5V/4MHz | 15 Β΅A |
| Typical Current 3V/32kHz | 1 Β΅A |
| ADC | 8-bit, up to 8 channels |
| Communication Peripherals | USART, MSSP (SPI/I2C) |
| Timers | Timer0, Timer1, Timer2 |
| PWM Outputs | Yes (via CCP module) |
| Hardware Stack | 8 levels |
| Package | 40-pin PDIP (0.600", 15.24 mm) |
| Mounting Type | Through-Hole |
| Operating Temperature Range | 0Β°C to +70Β°C (commercial, this suffix) |
| RoHS Status | Compliant |
| Lead-Free Finish | Matte Tin (Pb-free) |
PIC16C67-04/P Pin Configuration
| Pin 1 | MCLR/VPP β Master Clear (reset) input / programming voltage |
| Pin 2 | RA0/AN0 β Port A bit 0 / analog input 0 |
| Pin 3 | RA1/AN1 β Port A bit 1 / analog input 1 |
| Pin 4 | RA2/AN2 β Port A bit 2 / analog input 2 |
| Pin 5 | RA3/AN3/VREF β Port A bit 3 / analog input 3 / ADC reference |
| Pin 6 | RA4/T0CKI β Port A bit 4 / Timer0 clock input |
| Pin 7 | RA5/AN4/SS β Port A bit 5 / analog input 4 / SPI slave select |
| Pin 8 | RE0/RD β Port E bit 0 / parallel slave port read control |
| Pin 9 | RE1/WR β Port E bit 1 / parallel slave port write control |
| Pin 10 | RE2/CS β Port E bit 2 / parallel slave port chip select |
| Pin 11 | VDD β Positive supply (5V typical) |
| Pin 12 | VSS β Ground |
| Pin 13 | OSC1/CLKIN β Oscillator input / external clock input |
| Pin 14 | OSC2/CLKOUT β Oscillator output / clock output |
| Pin 15 | RC0/T1OSO/T1CKI β Port C bit 0 / Timer1 oscillator output |
| Pin 16 | RC1/T1OSI/CCP2 β Port C bit 1 / Timer1 oscillator input / CCP2 |
| Pin 17 | RC2/CCP1 β Port C bit 2 / Capture Compare PWM 1 |
| Pin 18 | RC3/SCK/SCL β Port C bit 3 / SPI clock / I2C clock |
| Pin 19 | RD0/PSP0 β Port D bit 0 / parallel slave port data bit 0 |
| Pin 20 | RD1/PSP1 β Port D bit 1 / parallel slave port data bit 1 |
| Pin 21 | RD2/PSP2 β Port D bit 2 / parallel slave port data bit 2 |
| Pin 22 | RD3/PSP3 β Port D bit 3 / parallel slave port data bit 3 |
| Pin 23 | RC4/SDI/SDA β Port C bit 4 / SPI data in / I2C data |
| Pin 24 | RC5/SDO β Port C bit 5 / SPI data out |
| Pin 25 | RC6/TX/CK β Port C bit 6 / USART TX / clock |
| Pin 26 | RC7/RX/DT β Port C bit 7 / USART RX / data |
| Pin 27 | RD4/PSP4 β Port D bit 4 / parallel slave port data bit 4 |
| Pin 28 | RD5/PSP5 β Port D bit 5 / parallel slave port data bit 5 |
| Pin 29 | RD6/PSP6 β Port D bit 6 / parallel slave port data bit 6 |
| Pin 30 | RD7/PSP7 β Port D bit 7 / parallel slave port data bit 7 |
| Pin 31 | VSS β Ground |
| Pin 32 | VDD β Positive supply (5V typical) |
| Pin 33 | RB0/INT β Port B bit 0 / external interrupt |
| Pin 34 | RB1 β Port B bit 1 |
| Pin 35 | RB2 β Port B bit 2 |
| Pin 36 | RB3/PGM β Port B bit 3 / low-voltage programming |
| Pin 37 | RB4 β Port B bit 4 |
| Pin 38 | RB5 β Port B bit 5 |
| Pin 39 | RB6/PGC β Port B bit 6 / ICSP clock |
| Pin 40 | RB7/PGD β Port B bit 7 / ICSP data |
Typical Applications
PIC16C67-04/P is suitable for 7 applications: Industrial Control Systems, Appliance and White Goods Controllers, Battery-Powered Instrumentation, Automotive Body Electronics (Legacy), Smart Sensor Signal Conditioning, Educational and Hobbyist Development, Point-of-Sale Terminals (Legacy).
Industrial Control Systems
The PIC16C67-04/P fits industrial control because its 33 digital I/O pins drive relays, sensors, and indicator panels directly, while the on-chip 8-bit ADC with eight input channels handles analog transducer signals without external components. At 4 MHz and 5 V, the 200 ns instruction cycle closes control loops in roughly 50 Β΅s, adequate for conveyor sequencing, packaging machinery, and HVAC damper actuators. The 14 KB OTP memory holds complete state machines and lookup tables for PID loops; the USART interfaces to operator panels, while the MSSP supports SPI displays or I2C EEPROM parameter storage.
Recommended
Appliance and White Goods Controllers
White-goods designers chose the PIC16C67-04/P for washing machines, microwave ovens, and dishwasher control boards because its 33 I/O lines drive seven-segment displays, keypad matrices, triac-fired heater loads, and motor direction relays from a single chip. The CCP module generates zero-crossing PWM for universal-motor speed control, and the 8-bit ADC reads temperature sensors (NTC) and water-level probes. Low 15 Β΅A active and 1 Β΅A standby currents help meet standby-power regulations under 1 W, while OTP code-lock prevents unauthorized firmware duplication.
Recommended
Battery-Powered Instrumentation
For portable meters and data loggers, the PIC16C67-04/P's 1 Β΅A typical standby current at 3 V and 32 kHz preserves battery life across months of idle storage; the fully static design lets the RTC wake the MCU only when a measurement is due. The 14-bit instruction word and 8-bit data path execute averaging filters and compression routines comfortably. The 8-channel ADC scans sensor arrays directly, while USART outputs to Bluetooth or IrDA modules. OTP code-lock prevents cloning of calibration data, a security advantage over flash parts.
Recommended
Automotive Body Electronics (Legacy)
Pre-CAN-era automotive body modules used the PIC16C67-04/P for central door locking, seat-memory, and lighting control because the 33 I/O lines and 8-bit ADC read switch panels and drive MOSFET bridges directly. The wide 2.5-6.0 V supply tolerance survives load-dump events, and the 4 MHz core performs timing sequences well within automotive latency budgets. The on-chip USART links to dashboard indicators, while the MSSP talks to dashboard LCDs in SPI mode. New designs should migrate to AEC-Q100 qualified PIC16F877A or PIC18F variants.
Recommended
Smart Sensor Signal Conditioning
Sensor hubs and transmitter boards use the PIC16C67-04/P to digitize thermocouple, strain-gauge, or pressure-bridge signals via the 8-bit ADC, apply linearization in firmware, and output either a 4-20 mA current loop or a Modbus RTU stream over the USART. The 14 KB OTP holds calibration tables for up to 32 sensor types. The MSSP drives I2C temperature compensation chips or SPI DACs. Brown-out reset and watchdog timer ensure reliable recovery from supply transients in field installations.
Recommended
Educational and Hobbyist Development
Universities and hobbyists adopted the PIC16C67-04/P as a teaching vehicle because the 40-pin PDIP is breadboard-friendly and the PIC16 mid-range instruction set (only 35 instructions) is approachable. MPLAB IDE and the PICSTART Plus programmer support the part, with the ICSP header enabling solderless re-programming during labs (note: OTP cannot be erased, so each code change requires a fresh chip in production hardware but EPROM-windowed JW parts exist for development). The variety of peripherals - ADC, USART, SPI, I2C, PWM - teaches nearly every embedded concept in one chip.
Recommended
Point-of-Sale Terminals (Legacy)
Pre-EMV-era POS terminals leveraged the PIC16C67-04/P for keypad scanning, LCD driving via SPI, magnetic-stripe reader interface through USART, and thermal printer control via CCP/PWM. The 33 I/O lines handle the entire I/O matrix without external logic. OTP code-lock protects proprietary payment protocols. Today's designers should choose PIC16F877A or PIC18F family for new POS hardware, but the PIC16C67 remains in service for legacy terminal refurbishment.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C67-04/P β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C67-10/P | PIC16C67-20/P | PIC16F877A-I/P | PIC16F877-04/P | PIC16C67-04I/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 40-PDIP (0.600 inch) | 40-PDIP (0.600 inch) - same | 40-PDIP (0.600 inch) - same | 40-PDIP (0.600 inch) - same | 40-PDIP (0.600 inch) - same | 40-PDIP (0.600 inch) - same |
| Program Memory Type | OTP EPROM | OTP EPROM | OTP EPROM | Flash | Flash | OTP EPROM |
| Program Memory Size | 14 KB (8K x 14) | 14 KB | 14 KB | 14 KB | 14 KB | 14 KB |
| Max Clock Frequency | 4 MHz | 10 MHz | 20 MHz | 20 MHz | 4 MHz | 4 MHz |
| Data RAM | 368 bytes | 368 bytes | 368 bytes | 368 bytes | 368 bytes | 368 bytes |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 |
| Operating Temperature Range | 0Β°C to +70Β°C (commercial) | 0Β°C to +70Β°C (commercial) | 0Β°C to +70Β°C (commercial) | -40Β°C to +85Β°C (industrial) | 0Β°C to +70Β°C (commercial) | -40Β°C to +85Β°C (industrial) |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Active | Obsolete | Obsolete |
Key Differentiators
- OTP code-lock security vs flash reprogrammability (vs PIC16F877A-I/P)
- Drop-in higher-speed same-family upgrade (vs PIC16C67-10/P)
- Wider commercial-to-industrial temperature option in same family (vs PIC16C67-04I/P)
Design Notes
OTP memory cannot be erased electrically. Once a PIC16C67-04/P is programmed, the only way to change the firmware is to physically replace the chip. Always fully verify code with a JW (windowed) or flash development part before programming production OTP units. Build a small rework budget into your BoM for engineering samples. Because OTP parts can be programmed only once, field firmware updates are impossible - if your product has any post-deployment update requirement, migrate to PIC16F877A instead.
Place a 0.1 Β΅F ceramic decoupling capacitor within 5 mm of each VDD/VSS pin pair (pins 11/12 and 31/32). For noisy environments, add a bulk 10 Β΅F tantalum or aluminum electrolytic capacitor at the board power entry. The PIC16C67-04/P supply range is 2.5 V to 6.0 V; brown-out reset should be enabled in the configuration word to protect against code corruption during supply droops below 4.0 V at 5 V nominal operation.
Reserve a 5-pin ICSP header (VPP/MCLR, PGD, PGC, VDD, VSS) on every production board even if you use OTP. This allows programming during board test and field recovery. For the 40-pin PDIP, position the ICSP connector near pins 1, 39, and 40 to keep the ICSP signals short. Use a 4.7 kΞ© pull-up on MCLR to VDD through a diode for proper reset behavior during programming.
Keep the crystal/oscillator traces short (under 10 mm) and surround them with a ground guard ring on both sides of the PCB. For 4 MHz operation a fundamental-mode AT-cut crystal with 20 pF load capacitors is typical. When using the internal RC oscillator (PIC16C67-04/P supports this), verify that timing-critical peripherals like USART can tolerate the +/- 1% to +/- 5% RC tolerance before committing to the design.
Compliance Information
RoHS compliance per Microchip product page lead-free matte-tin finish. Not AEC-Q100 qualified (PIC16C family is not automotive grade); AEC-Q100 users must select PIC16F or PIC18 equivalents. REACH and conflict-mineral statements should be requested from Microchip directly via the official compliance letter program.
