PIC16LC662-04/L - 7KB OTP 8-bit MCU, 4MHz, 33 I/O, CERDIP-40 | Microchip
MPN: PIC16LC662-04/L β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.95 | $7.95 |
| 10 | $7.1 | $71.00 |
| 100 | $6.25 | $625.00 |
| 500 | $5.55 | $2,775.00 |
| 1,000 | $4.95 | $4,950.00 |
PIC16LC662-04/L Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, volatile data memory, and configurable peripherals. PIC microcontrollers use a Harvard-architecture RISC core, executing one instruction per cycle, which simplifies firmware timing. The PIC16C6X series sits within the broader PIC mid-range family (PIC12 -> PIC16 -> PIC18 hierarchy), commonly used for embedded control in industrial, automotive, and consumer systems. The "LC" low-power CMOS variant extends battery and portable operating range compared to the original PIC16C66.
Key features include three timer modules: Timer0 (8-bit with 8-bit prescaler), Timer1 (16-bit with prescaler, externally clockable during sleep), and Timer2 (8-bit), plus a 5-channel 8-bit ADC, two analog comparators, a USART, and a synchronous serial port. The device offers programmable code protection, in-circuit serial programming (ICSP) capability, and a programmable brown-out reset. Operating current consumption is typically under 2 mA at 4 MHz / 5 V, with a sleep current below 1 Β΅A.
The PIC16LC662 uses Microchip's PIC16 mid-range core with a 14-bit instruction word and 8-bit data path, executed through a two-stage pipeline. The 33 I/O pins can source or sink up to 25 mA each, sufficient for LED and small-relay driving without external drivers. Memory-mapped peripheral registers follow the standard PIC16C6X layout, simplifying migration from sibling devices such as PIC16C66, PIC16C65, and PIC16C63.
Typical applications include industrial motor control, HVAC fan and damper control, automotive body electronics (pre-CAN clusters), security alarm panels, instrumentation front-ends, and consumer appliance controllers. The 33 I/O count suits keypad + LCD interface designs and multi-channel sensor acquisition.
When designing with this device, remember that the OTP memory cannot be reprogrammed; for engineering development, the CERDIP windowed package enables UV erasure. For high-volume production, migrate to a flash-based PIC16F equivalent with the same pinout to enable field updates.
This page synthesizes Microchip datasheet parameters, distributor stock and pricing, drop-in same-family alternatives, and PCB design guidance not consolidated on a single vendor page.
Drop-in alternatives for PIC16LC662-04/L 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 PIC16LC662-04/L (same form factor and footprint) β differing in RAM Size, RoHS Status, Supply Voltage Range, Mounting Type, Program Memory Size.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16C66-04/L
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
PIC16LC66-04/L
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
PIC16C662-04/L
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
PIC16C65B-04/PQ
β Drop-Inβ In Stock
$10.25 / Unit
View Datasheet βPIC16F877A-I/P
β Drop-Inπ Reference alternative (not in catalog)
PIC16LC662-04/L Maximum Ratings & Electrical Characteristics
| Core Processor | PIC |
| Core Size | 8-bit |
| Program Memory Size | 7 KB (4K x 14) OTP |
| RAM Size | 176 bytes |
| I/O Pins | 33 |
| Clock Speed | 4 MHz |
| Supply Voltage Range | 2.5 V to 5.5 V |
| ROM Type | OTP / UVPROM |
| Package | CERDIP-40 (windowed) |
| Mounting Type | Through-Hole |
| Operating Temperature | 0 C to +70 C (commercial) |
| ADC | 5-channel, 8-bit |
| Timers | 3 (Timer0 8-bit, Timer1 16-bit, Timer2 8-bit) |
| Communication | USART, SSP (SPI/I2C) |
| Brown-out Reset | Yes (programmable) |
| RoHS Status | Non-compliant (contains lead, windowed CERDIP) |
PIC16LC662-04/L Pin Configuration
| Pin 1 | RA2/AN2 β Bidirectional I/O / analog input 2 |
| Pin 2 | RA3/AN3/VREF+ β Bidirectional I/O / analog input 3 / ADC reference plus |
| Pin 3 | RA4/T0CKI β Bidirectional I/O / Timer0 clock input |
| Pin 4 | RA5/AN4/SS β Bidirectional I/O / analog input 4 / SSP slave select |
| Pin 5 | RE0/RD/AN5 β Bidirectional I/O / parallel-port read / analog input 5 |
| Pin 6 | RE1/WR/AN6 β Bidirectional I/O / parallel-port write / analog input 6 |
| Pin 7 | RE2/CS/AN7 β Bidirectional I/O / parallel-port chip select / analog input 7 |
| Pin 8 | OSC1/CLKIN β Crystal oscillator input / external clock input |
| Pin 9 | OSC2/CLKOUT β Crystal oscillator output / clock output (Fosc/4) |
| Pin 10 | RC0/T1OSO/T1CKI β Bidirectional I/O / Timer1 oscillator output / Timer1 clock |
| Pin 11 | RC1/T1OSI/CCP2 β Bidirectional I/O / Timer1 oscillator input / Capture-Compare-PWM2 |
| Pin 12 | RC2/CCP1 β Bidirectional I/O / Capture-Compare-PWM1 |
| Pin 13 | RC3/SCK/SCL β Bidirectional I/O / SSP clock (SPI/I2C) |
| Pin 14 | RC4/SDI/SDA β Bidirectional I/O / SSP data in (SPI/I2C) |
| Pin 15 | RC5/SDO β Bidirectional I/O / SSP data out |
| Pin 16 | RC6/TX/CK β Bidirectional I/O / USART TX / clock |
| Pin 17 | RC7/RX/DT β Bidirectional I/O / USART RX / data |
| Pin 18 | RD0/PSP0 β Bidirectional I/O / parallel slave port bit 0 |
| Pin 19 | RD1/PSP1 β Bidirectional I/O / parallel slave port bit 1 |
| Pin 20 | RD2/PSP2 β Bidirectional I/O / parallel slave port bit 2 |
| Pin 21 | RD3/PSP3 β Bidirectional I/O / parallel slave port bit 3 |
| Pin 22 | RD4/PSP4 β Bidirectional I/O / parallel slave port bit 4 |
| Pin 23 | RD5/PSP5 β Bidirectional I/O / parallel slave port bit 5 |
| Pin 24 | RD6/PSP6 β Bidirectional I/O / parallel slave port bit 6 |
| Pin 25 | RD7/PSP7 β Bidirectional I/O / parallel slave port bit 7 |
| Pin 26 | VSS β Ground reference |
| Pin 27 | VDD β Positive supply (2.5 V to 5.5 V) |
| Pin 28 | RB0/INT β Bidirectional I/O / external interrupt input |
| Pin 29 | RB1 β Bidirectional I/O |
| Pin 30 | RB2 β Bidirectional I/O |
| Pin 31 | RB3 β Bidirectional I/O |
| Pin 32 | RB4 β Bidirectional I/O (interrupt-on-change) |
| Pin 33 | RB5 β Bidirectional I/O (interrupt-on-change) |
| Pin 34 | RB6 β Bidirectional I/O (interrupt-on-change / ICSP clock) |
| Pin 35 | RB7 β Bidirectional I/O (interrupt-on-change / ICSP data) |
| Pin 36 | RA0/AN0 β Bidirectional I/O / analog input 0 |
| Pin 37 | RA1/AN1 β Bidirectional I/O / analog input 1 |
| Pin 38 | VSS β Ground reference |
| Pin 39 | VDD β Positive supply (2.5 V to 5.5 V) |
| Pin 40 | MCLR/VPP β Master clear reset input / programming voltage |
Typical Applications
PIC16LC662-04/L is suitable for 7 applications: Industrial Motor Control, HVAC Fan and Damper Control, Security Alarm Panel, Instrumentation Front-End, Consumer Appliance Controller, Pre-CAN Automotive Body Electronics, Embedded Education and Development Platform.
Industrial Motor Control
The PIC16LC662-04/L fits industrial motor-control boards where its 33 I/O pins (each capable of 25 mA source/sink per the Microchip datasheet) drive direction relays, brake coils, and triac gates directly, while its 8-bit ADC samples current shunts and back-EMF. The LC low-power CMOS process keeps thermal dissipation under 2 mA typical operating current, suitable for 24/7 cabinet-mounted controls. Three timer modules (Timer0 8-bit, Timer1 16-bit, Timer2 8-bit) generate the PWM edges and quadrature-capture interrupts typical of BLDC and stepper commutation. Compared to a PIC16F877A migration target, this LC662 variant offers lower quiescent current at the same I/O count.
Recommended
HVAC Fan and Damper Control
The PIC16LC662-04/L is well-matched to HVAC damper and fan-control boards needing 33 I/O for triac-fired outputs, thermistor ADC inputs, and keypad/display interfaces. Operating from 2.5 V to 5.5 V, it accepts unregulated 24 VAC-derived rails after rectification, and its programmable brown-out reset prevents firmware lockup during brown-outs. The 7 KB OTP memory holds typical PID control loops, scheduling tables, and fault logging. According to Microchip, the PIC16C6X core runs all 35 RISC instructions in a single 1 Β΅s cycle at 4 MHz, sufficient for 10 ms HVAC control periods.
Recommended
Security Alarm Panel
The PIC16LC662-04/L suits security alarm panels where 33 I/O scan PIR sensors, door contacts, glass-break detectors, and keypad matrices, while driving piezo buzzers and relay outputs. Its <1 Β΅A sleep current extends backup-battery life during AC mains failure, a critical requirement for UL-listed alarm systems. The USART interfaces to a digital communicator (DACT) for central-station reporting, and the SSP handles I2C keypads and EEPROM parameter storage. Per the Microchip datasheet, programmable code protection prevents firmware reverse engineering, important for compliance with security-industry anti-tamper requirements.
Recommended
Instrumentation Front-End
The PIC16LC662-04/L operates as a low-cost instrumentation front-end, where its 5-channel 8-bit ADC digitizes thermocouple/pressure/strain-gauge signals and the USART streams to a host PC or display. The PIC16C6X core's deterministic 1 Β΅s instruction cycle supports fixed-rate sampling without RTOS overhead. Windowed CERDIP enables in-lab firmware iteration via UV erasure before locking the design with a one-time-programmable plastic DIP variant for production. The 176-byte RAM is sufficient for circular sample buffers in many low-rate instrumentation tasks.
Recommended
Consumer Appliance Controller
The PIC16LC662-04/L is appropriate for washing-machine, dishwasher, and microwave-oven control boards where 33 I/O drive 7-segment displays, triac outputs for motors, and rotary encoder inputs. Operating temperature 0 C to +70 C commercial grade covers most indoor appliance environments, and the 2.5 V to 5.5 V supply range tolerates rectified mains variation. Per Microchip's PIC16 mid-range documentation, the integrated brown-out reset avoids firmware lockup during brown-outs, a common event in appliance power cycles.
Recommended
Pre-CAN Automotive Body Electronics
The PIC16LC662-04/L was historically used in pre-CAN automotive body modules such as mirror controllers, seat positioners, and interior lighting drivers. Its 33 I/O handle multiple motor H-bridges and LED strings, while the USART supports LIN-bus-like UART communication. Although the LC662 lacks AEC-Q100 qualification, its commercial 0-70 C grade is acceptable for cabin-mounted modules. Designers requiring automotive qualification today migrate to PIC16F877A or dsPIC33CH devices that retain a similar I/O count with flash memory and enhanced peripherals.
Recommended
Embedded Education and Development Platform
The PIC16LC662-04/L is well-suited to university embedded-systems courses and developer training kits because the windowed CERDIP enables UV erasure, allowing students to iterate firmware without wasting flash cycles. Its 7 KB OTP holds representative control programs covering ADC, timers, USART, and interrupts - the canonical PIC16 mid-range curriculum. The PIC16C6X instruction set (35 single-word RISC instructions) is the historical reference for embedded engineering courses, and PIC assembly language taught on this chip transfers directly to PIC16F1xxx and PIC18 modern families.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LC662-04/L β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C66-04/L | PIC16LC66-04/L | PIC16C662-04/L | PIC16F877A-I/P |
|---|---|---|---|---|---|
| Package | CERDIP-40 (windowed) | CERDIP-40 (windowed) - same | CERDIP-40 (windowed) - same | CERDIP-40 (windowed) - same | PDIP-40 - same 40-pin DIP footprint |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Architecture | PIC16 mid-range 8-bit | PIC16 mid-range 8-bit | PIC16 mid-range 8-bit | PIC16 mid-range 8-bit | PIC16 mid-range 8-bit (flash) |
| Program Memory | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 14 KB flash (+100%) |
| Maximum Clock Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 20 MHz (+400%) |
| I/O Pins | 33 | 33 | 33 | 33 | 33 |
| Supply Voltage | 2.5 V to 5.5 V | 3.0 V to 5.5 V (standard CMOS) | 2.5 V to 5.5 V | 3.0 V to 5.5 V (standard CMOS) | 2.0 V to 5.5 V |
| Memory Type | OTP / UVPROM | OTP / UVPROM | OTP / UVPROM | OTP / UVPROM | Flash (electrically erasable) |
| Lifecycle Status | Active (mature) | Obsolete | Obsolete | Active (mature) | Active |
Key Differentiators
- Windowed CERDIP allows UV erasure and reuse on engineering bench (vs PIC16F877A-I/P)
- Lower supply voltage range extends to 2.5 V (vs PIC16C66-04/L)
- PIC16 mid-range 8-bit RISC with 35 instructions (vs MCS-51 8051-family MCU)
- 33 I/O pins each capable of 25 mA source/sink (vs PIC18F equivalent)
Design Notes
The PIC16LC662-04/L is OTP/UVPROM only - once programmed, the device cannot be re-programmed electrically. The windowed CERDIP package is intended for engineering development only; high-volume production should migrate to a flash-based PIC16F877A or PIC16F1xxx equivalent with the same 40-pin PDIP footprint to enable field firmware updates and avoid tooling for a ceramic DIP that is no longer RoHS-compliant due to its lead content.
Per the Microchip PIC16C6X datasheet, the LC low-power CMOS variant reduces operating current to ~2 mA typical at 4 MHz / 5 V and sleep current below 1 Β΅A. For battery-backed applications, drive MCLR with a 4.7 kohm pull-up to VDD and use the brown-out reset feature to prevent firmware lockup during voltage dips. Decoupling: place a 100 nF ceramic on each VDD/VSS pair as close to the package pins as possible.
Place a 4 MHz crystal or resonator with two 22 pF load capacitors within 5 mm of OSC1/OSC2 pins; keep oscillator traces short and shield with a ground pour to avoid radiating EMI into adjacent analog inputs. RA4 is an open-drain output - externalize a 10 kohm pull-up if used as a digital output. For ICD/ICSP connection, reserve a 5-pin header on RA6/RA7/RB3/RB6/RB7/MCLR (PIC16F migration parts) so that programming can be performed in-circuit.
At 4 MHz / 5 V with all 33 I/O at idle, the PIC16LC662-04/L dissipates approximately 10 mW internally. Across the commercial 0-70 C operating range, no heatsink or thermal management is required. If extended to industrial -40 to +85 C, refer to Microchip document 31005a for derating curves. Estimated: T_j rise above ambient is below 1 C in typical desk-top mounting.
The windowed CERDIP package must not be placed in direct sunlight or under UV-sterilizing lamps - the quartz window will erase the UVPROM. For prototype boards, mask the window with opaque tape after programming to prevent accidental erasure during shipping or storage. For conformal coating processes, ensure the coating vendor's UV-cure step is blocked at the window location.
Compliance Information
Windowed CERDIP package contains lead and is not RoHS-compliant per the hotenda and digchip listings. Not AEC-Q100 qualified - choose PIC16F877A-I/P or dsPIC33CH for automotive. Reach status confirmed compliant per Microchip product dossier; halogen-free status is unknown because the CERDIP is not currently RoHS-compliant.
