PIC16LC67-04I/PQ - 8-bit 4MHz 14KB OTP MCU 44-MQFP | Microchip
MPN: PIC16LC67-04I/PQ ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $11.83 | $11.83 |
| 10 | $10.85 | $108.50 |
| 100 | $9.42 | $942.00 |
| 500 | $8.15 | $4,075.00 |
| 1,000 | $7.05 | $7,050.00 |
PIC16LC67-04I/PQ Overview
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, working RAM, and configurable I/O peripherals. Within the component taxonomy, the PIC16LC67 belongs to the 8-bit microcontroller family, which is itself a branch of the broader microcontroller IC category, sitting beneath embedded processors and the general semiconductor hierarchy. The 'LC' prefix indicates a low-power CMOS variant of the PIC16C architecture, designed for battery-powered and portable applications where active and standby current budgets are critical.
Key features of the PIC16LC67 include an 8-bit Harvard RISC architecture with a reduced instruction set, three timers, two capture/compare/PWM modules, a USART serial interface, and a 10-bit (or 8-bit) analog-to-digital converter depending on silicon revision. The device also supports in-circuit serial programming (ICSP), enabling firmware updates after PCB assembly. The 44-MQFP package provides generous pin count for applications requiring multiple peripheral interfaces simultaneously.
Typical applications include industrial control panels, instrumentation with serial telemetry, low-power sensor interface boards, and embedded control in automotive body electronics. The wide 2.5 V to 6.0 V supply range makes the LC variant suitable for both 3.3 V and 5 V system designs without level translation.
When selecting this MCU, consider that OTP memory requires mask-programmed or windowed EPROM equivalents for production programming; for flash-based migration the PIC16F877 in the same 44-pin footprint is the recommended successor. Designers should also evaluate the LC variant for active-mode current consumption since it differs from the F-series equivalent. Always validate pin compatibility against the published datasheet before PCB redesign, as some PIC16 family members share only pin count but differ in peripheral mapping.
Drop-in alternatives for PIC16LC67-04I/PQ — 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 PIC16LC67-04I/PQ (same form factor and footprint) — differing in Package, Program Memory Size, Core Architecture, Program Memory Type, Instruction Set.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LC67-04/PT
✅ Drop-In✓ In Stock
$6.98 / Unit
View Datasheet →PIC16LC67-04I/PT
✅ Drop-In✓ In Stock
$6.95 / Unit
View Datasheet →PIC16C67-04I/PQ
✅ Drop-In✓ In Stock
$6.1 / Unit
View Datasheet →PIC16LC67T-04I/PQ
✅ Drop-In✓ In Stock
$1.92 / Unit
View Datasheet →PIC16F877-04I/PQ
✅ Drop-In✓ In Stock
$4.35 / Unit
View Datasheet →PIC16F877A-I/PQ
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LC67-04I/PQ Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC RISC (Harvard) |
| Family | PIC16C |
| Maximum Clock Frequency | 4 MHz |
| Program Memory Size | 14 KB (8K x 14) OTP |
| RAM Size | 368 bytes |
| Number of I/O Pins | 33 |
| Package | 44-MQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| Operating Voltage Range | 2.5 V to 6.0 V |
| Operating Temperature Range | -40 C to +85 C (Industrial) |
| Oscillator Type | External |
| Data EEPROM | Not present (OTP only) |
| Timers | 3 (Timer0, Timer1, Timer2) |
| Capture/Compare/PWM | 2 modules |
| Serial Interface | USART |
| ICSP Programming | Yes |
PIC16LC67-04I/PQ Pin Configuration
| Pin 1 | OSC1/CLKIN — Oscillator input or external clock input |
| Pin 2 | OSC2/CLKOUT — Oscillator output or clock output |
| Pin 3 | MCLR/VPP — Master clear reset or programming voltage input |
| Pin 4 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Pin 5 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Pin 6 | RA2/AN2 — PORTA bit 2 / analog input 2 |
| Pin 7 | RA3/AN3/VREF — PORTA bit 3 / analog input 3 / voltage reference |
| Pin 8 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pin 9 | RA5/AN4/SS — PORTA bit 5 / analog input 4 / SPI slave select |
| Pin 10 | VSS — Ground reference |
| Pin 11 | VDD — Positive supply voltage |
| Pin 12 | RB0/INT — PORTB bit 0 / external interrupt |
| Pin 13 | RB1 — PORTB bit 1 |
| Pin 14 | RB2 — PORTB bit 2 |
| Pin 15 | RB3/PGM — PORTB bit 3 / low-voltage programming |
| Pin 16 | RB4 — PORTB bit 4 |
| Pin 17 | RB5 — PORTB bit 5 |
| Pin 18 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 19 | RB7/PGD — PORTB bit 7 / ICSP data |
| Pin 20 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Pin 21 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| Pin 22 | RC2/CCP1 — PORTC bit 2 / CCP1 output |
| Pin 23 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pin 24 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pin 25 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pin 26 | RC6/TX/CK — PORTC bit 6 / USART transmit / USART clock |
| Pin 27 | RC7/RX/DT — PORTC bit 7 / USART receive / USART data |
| Pin 28 | RE0/RD/AN5 — PORTRE bit 0 / parallel port read / analog input 5 |
| Pin 29 | RE1/WR/AN6 — PORTRE bit 1 / parallel port write / analog input 6 |
| Pin 30 | RE2/CS/AN7 — PORTRE bit 2 / parallel port chip select / analog input 7 |
| Pin 31 | VSS — Ground reference |
| Pin 32 | VDD — Positive supply voltage |
| Pin 33 | RF0 — PORTF bit 0 |
| Pin 34 | RF1 — PORTF bit 1 |
| Pin 35 | RF2 — PORTF bit 2 |
| Pin 36 | RF3 — PORTF bit 3 |
| Pin 37 | RF4 — PORTF bit 4 |
| Pin 38 | RF5 — PORTF bit 5 |
| Pin 39 | RF6 — PORTF bit 6 |
| Pin 40 | RF7 — PORTF bit 7 |
| Pin 41 | RG0 — PORTG bit 0 |
| Pin 42 | RG1 — PORTG bit 1 |
| Pin 43 | RG2 — PORTG bit 2 |
| Pin 44 | RG3 — PORTG bit 3 |
Typical Applications
PIC16LC67-04I/PQ is suitable for 6 applications: Industrial Control Panels, Portable Battery-Powered Instruments, Sensor Interface Boards, Automotive Body Electronics, Embedded Instrumentation with Serial Telemetry, Low-Cost Consumer Appliances.
Industrial Control Panels
The PIC16LC67-04I/PQ is well suited for industrial control panels where its 33 GPIO pins, USART interface, and 2.5V to 6.0V supply range simplify integration with 3.3V sensor modules and 5V driver ICs. The wide -40C to +85C industrial temperature grade supports factory-floor deployments, while the 14 KB OTP program memory accommodates scan-loop logic and operator interface routines. Industrial panel designers favor this MCU because its CCP modules can drive PWM-controlled indicators and its 4 MHz clock is sufficient for HMI refresh rates without EMI issues.
Recommended
Portable Battery-Powered Instruments
The PIC16LC67-04I/PQ excels in portable battery-powered instruments because the 'LC' low-voltage CMOS process enables operation down to 2.5V, allowing direct connection to two AA cells (2.4-3.0V) without a boost converter. With 368 bytes of RAM, three timers for low-power duty cycling, and the USART for serial telemetry, the MCU supports multi-channel data logging with sleep-mode current budgets under 1 mA. Designers select the LC variant when the instrument must run months on a single battery and the OTP memory cost saving outweighs field-upgrade limitations.
Recommended
Sensor Interface Boards
For multi-sensor interface boards, the PIC16LC67-04I/PQ provides 33 GPIO pins that can directly sample digital sensors and drive analog front-ends via its PWM modules. The CCP and USART peripherals allow simultaneous capture of pulse-train flowmeters, PWM output to actuator drivers, and RS-485 telemetry to a host controller. The 2.5V to 6.0V supply range means a single board design can accept 3.3V or 5V sensor power rails without level shifters, simplifying the BOM and reducing board cost for high-volume sensor products.
Recommended
Automotive Body Electronics
In automotive body electronics (non-safety), the PIC16LC67-04I/PQ handles HVAC blend-door control, seat-position memory, and lighting PWM where its 33 GPIO and two CCP modules drive multiple brush DC motors or LED arrays simultaneously. While not AEC-Q100 qualified, the industrial -40C to +85C temperature grade and wide supply range tolerate underhood and cabin thermal environments. Automotive body-electronics designers choose this MCU for cost-sensitive applications where the flash-free OTP memory actually improves security against unauthorized firmware cloning.
Recommended
Embedded Instrumentation with Serial Telemetry
The PIC16LC67-04I/PQ is a natural fit for embedded instrumentation requiring serial telemetry, as its hardware USART supports RS-232, RS-485, or simple TTL comms without bit-banging overhead. Combined with its 4 MHz clock (yielding 1 MIPS instruction rate) and 14 KB OTP for instrument code, the MCU can poll sensors, format data packets, and stream to a host at 9600-115200 baud reliably. Laboratory bench instruments and field data loggers use this part to add a low-cost local display and remote reporting channel without complex protocol stacks.
Recommended
Low-Cost Consumer Appliances
Consumer appliance designs (washing machines, microwave ovens, small kitchen appliances) leverage the PIC16LC67-04I/PQ for its 14 KB OTP program memory that locks the final firmware against field tampering, plus its 33 GPIO pins that drive seven-segment displays, keypads, and triac control outputs simultaneously. The 4 MHz instruction rate is more than adequate for scan-loop debounce and timing logic, while the 2.5V to 6.0V supply range supports both 3.3V logic-level and traditional 5V designs. Cost-sensitive appliance makers select this MCU because OTP programming at scale drops the per-unit cost below equivalent flash parts.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LC67-04I/PQ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LC67-04/PT | PIC16LC67-04I/PT | PIC16C67-04I/PQ | PIC16F877-04I/PQ | PIC16F877A-I/PQ |
|---|---|---|---|---|---|---|
| Package | 44-MQFP (10x10 mm) | 44-MQFP (10x10 mm) - same | 44-MQFP (10x10 mm) - same | 44-MQFP (10x10 mm) - same | 44-MQFP (10x10 mm) - same | 44-MQFP (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory Type | 14 KB (8K x 14) OTP | 14 KB OTP - same | 14 KB OTP - same | 14 KB OTP - same | 8 KB (4K x 14) Flash - different | 14 KB (8K x 14) Flash - same |
| Maximum Clock | 4 MHz | 4 MHz - same | 4 MHz - same | 4 MHz - same | 4 MHz - same | 20 MHz - different |
| Operating Voltage Range | 2.5 V to 6.0 V | 2.5 V to 6.0 V - same | 2.5 V to 6.0 V - same | 4.0 V to 6.0 V - narrower | 4.0 V to 6.0 V - narrower | 4.0 V to 5.5 V - narrower |
| RAM Size | 368 bytes | 368 bytes - same | 368 bytes - same | 368 bytes - same | 368 bytes - same | 368 bytes - same |
| Number of I/O Pins | 33 | 33 - same | 33 - same | 33 - same | 33 - same | 33 - same |
| Operating Temperature | -40 C to +85 C (Industrial) | 0 C to +70 C (Commercial) - different | -40 C to +85 C - same | -40 C to +85 C - same | -40 C to +85 C - same | -40 C to +85 C - same |
Key Differentiators
- Low-voltage operation down to 2.5 V (vs PIC16C67-04I/PQ)
- OTP memory security for production (vs PIC16F877-04I/PQ)
- Industrial -40 C to +85 C temperature grade (vs PIC16LC67-04/PT)
Design Notes
The PIC16LC67-04I/PQ operates from 2.5 V to 6.0 V; when designing for 3.3 V systems, ensure upstream regulator tolerance keeps VDD above 2.5 V minimum at all load transients. Add a 0.1 uF ceramic decoupling capacitor close to each VDD/VDD pair (pins 11 and 32) plus a bulk 10 uF electrolytic on the board. For battery applications, validate brown-out voltage thresholds against your LDO/MCP1700 dropout spec at maximum MCU active current (~2 mA at 4 MHz).
Place the 0.1 uF ceramic decoupling capacitor within 5 mm of each VDD/VSS pin pair. Route MCLR/VPP to a dedicated programming header with 10 kΩ pull-up to VDD; do not use the same net for other I/O. The MQFP-44 package has a 0.8 mm pitch which is hand-solderable with fine tip but requires a reflow profile with peak temperature below 245 C per JEDEC J-STD-020. Reserve a small copper pour under the package center to act as a thermal anchor.
OTP program memory cannot be re-programmed in-circuit; once blown, the PIC16LC67-04I/PQ is locked to that firmware image. Build a small engineering prototype using a flash-based equivalent (PIC16F877) for firmware iteration, then commit to OTP only after code is finalized. Also note that the LC variant supports 2.5 V but oscillator start-up time increases at lower VDD; allow up to 1 second of MCLR delay at 2.5 V before code execution begins.
The PIC16LC67-04I/PQ's USART pins (RC6/TX, RC7/RX) drive at CMOS levels with limited slew control; for RS-232 connections above 115200 baud add a MAX232 or MAX3232 line driver. The 33 GPIO pins are not 5 V tolerant when VDD is 3.3 V; always level-shift inputs above VDD+0.3 V. For mixed 3.3 V/5 V designs, route all 5 V I/O through the analog input multiplex path and use the digital-only ports for clean 3.3 V signals.
Compliance Information
Lifecycle status NRND (Not Recommended for New Designs). RoHS and REACH compliance data not found in provided web data; consult Microchip product environmental compliance documentation. Not AEC-Q100 qualified.
