PIC16LC64A-04/L - 8-bit PIC MCU, 4MHz, 3.5KB OTP, PLCC-44 | Microchip
MPN: PIC16LC64A-04/L ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.45 | $8.45 |
| 10 | $7.62 | $76.20 |
| 100 | $6.81 | $681.00 |
| 500 | $6.1 | $3,050.00 |
| 1,000 | $5.48 | $5,480.00 |
PIC16LC64A-04/L Overview
A PIC microcontroller is a family of 8-bit RISC microcontrollers built around the Harvard architecture, where program and data memories are physically separate. PIC16C-series devices typically expose 35 single-word instructions, all executing in one instruction cycle except for program branches, which take two cycles. These microcontrollers sit within the broader hierarchy: microcontroller -> MCU -> embedded processor -> semiconductor. The 'LC' prefix in PIC16LC64A denotes a low-power CMOS variant optimized for operation across 3.0 V to 5.5 V, extending battery-backed and portable use cases.
Key features of the PIC16LC64A-04/L include fully static operation (allowing the clock to be stopped for sleep-mode power saving), a wide operating voltage range of 3.0 V to 5.5 V, multiple packaging options including windowed ceramic DIP for development and PLCC for production, and low typical supply currents of 15 uA at 5 V/4 MHz and 1 uA at 3 V/32 kHz. The 33 I/O pins support peripheral functions including timers, UART, and analog comparator blocks typical of the PIC16C6x family.
The PIC16LC64A uses CMOS EPROM/ROM technology with a RISC architecture that completes nearly every instruction in a single cycle, yielding deterministic interrupt response. Peripherals shared with the PIC16C6x family include multiple timers, a synchronous serial port (SSP), and capture/compare/PWM modules, enabling motor control, sensor signal conditioning, and communication-front-end designs.
Typical applications include industrial automation and sensor interfacing, automotive body and chassis subsystems, building automation control boards, and low-power consumer appliances. Its wide voltage range and OTP programmability make it appropriate for cost-sensitive production runs that do not need field re-programmability.
When designing with this part, verify your firmware against the PIC16C6x family reference manual because the PIC16LC64A is pin- and code-compatible with siblings such as PIC16C64A and PIC16CR64A, allowing assembly reuse across product variants. Also note that the OTP variant cannot be erased; for development cycles, prefer a windowed ceramic DIP (JW) equivalent.
This page synthesizes distributor pricing, package-level cross-references, and design notes that complement the Microchip datasheet by surfacing alternatives and procurement context.
Drop-in alternatives for PIC16LC64A-04/L — 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 PIC16LC64A-04/L (same form factor and footprint) — differing in Package, Mounting Type, Program Memory Size, Program Memory Type, Core.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16C64A-04/L
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$6.2 / Unit
View Datasheet →PIC16CR64A-04/L
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC16LC65A-04I/L
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC16LC64A-04/L Maximum Ratings & Electrical Characteristics
| Core | PIC16C 8-bit RISC |
| Maximum Clock Frequency | 4 MHz |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 3.5 KB (2K x 14 words) |
| Data RAM | 128 bytes |
| Supply Voltage Range | 3.0 V to 5.5 V |
| Number of I/O Pins | 33 |
| Package | PLCC-44 (16.59 x 16.59 mm) |
| Mounting Type | Surface Mount |
| Architecture | Harvard (RISC) |
| Instruction Set | 35 single-word instructions |
| Operating Temperature Range | -40C to +85C (industrial) |
| Typical Active Current | 15 uA at 5 V / 4 MHz (typical, family) |
| Typical Sleep Current | 1 uA at 3 V / 32 kHz (typical, family) |
PIC16LC64A-04/L Pin Configuration
| Pin 1 | MCLR/Vpp — Master clear (reset) input / programming voltage input |
| Pin 2 | RA0/AN0 — Port A bit 0 / analog input 0 |
| Pin 3 | RA1/AN1 — Port A bit 1 / analog input 1 |
| Pin 4 | RA2/AN2 — Port A bit 2 / analog input 2 |
| Pin 5 | RA3/AN3/Vref+ — Port A bit 3 / analog input 3 / ADC reference |
| Pin 6 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| Pin 7 | RA5/AN4/SS — Port A bit 5 / analog input 4 / SPI slave select |
| Pin 8 | Vss — Ground reference |
| Pin 9 | OSC1/CLKIN — Crystal oscillator input / external clock input |
| Pin 10 | OSC2/CLKOUT — Crystal oscillator output / clock output |
| Pin 11 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer1 oscillator out / Timer1 clock in |
| Pin 12 | RC1/T1OSI/CCP2 — Port C bit 1 / Timer1 oscillator in / Capture-Compare-PWM 2 |
| Pin 13 | RC2/CCP1 — Port C bit 2 / Capture-Compare-PWM 1 |
| Pin 14 | RC3/SCK/SCL — Port C bit 3 / SPI clock / I2C clock |
| Pin 15 | RC4/SDI/SDA — Port C bit 4 / SPI data in / I2C data |
| Pin 16 | RC5/SDO — Port C bit 5 / SPI data out |
| Pin 17 | RC6/TX/CK — Port C bit 6 / USART transmit / clock |
| Pin 18 | RC7/RX/DT — Port C bit 7 / USART receive / data |
| Pin 19 | Vss — Ground reference |
| Pin 20 | Vdd — Positive supply voltage |
| Pin 21 | RB0/INT — Port B bit 0 / external interrupt |
| Pin 22 | RB1 — Port B bit 1 |
| Pin 23 | RB2 — Port B bit 2 |
| Pin 24 | RB3 — Port B bit 3 |
| Pin 25 | RB4 — Port B bit 4 |
| Pin 26 | RB5 — Port B bit 5 |
| Pin 27 | RB6/PGC — Port B bit 6 / ICSP clock |
| Pin 28 | RB7/PGD — Port B bit 7 / ICSP data |
| Pin 29 | NC — Not connected (per datasheet) |
| Pin 30 | NC — Not connected (per datasheet) |
| Pin 31 | NC — Not connected (per datasheet) |
| Pin 32 | NC — Not connected (per datasheet) |
| Pin 33 | NC — Not connected (per datasheet) |
| Pin 34 | NC — Not connected (per datasheet) |
| Pin 35 | NC — Not connected (per datasheet) |
| Pin 36 | NC — Not connected (per datasheet) |
| Pin 37 | NC — Not connected (per datasheet) |
| Pin 38 | NC — Not connected (per datasheet) |
| Pin 39 | NC — Not connected (per datasheet) |
| Pin 40 | NC — Not connected (per datasheet) |
| Pin 41 | NC — Not connected (per datasheet) |
| Pin 42 | NC — Not connected (per datasheet) |
| Pin 43 | NC — Not connected (per datasheet) |
| Pin 44 | NC — Not connected (per datasheet) |
Typical Applications
PIC16LC64A-04/L is suitable for 6 applications: Industrial Automation Control, Automotive Body Electronics, Building Automation & HVAC, Low-Power Sensor Hubs, Consumer Appliance Control, Communication Front-End & Modem Glue.
Industrial Automation Control
The PIC16LC64A-04/L suits industrial control boards where 33 I/O lines can drive relays, opto-isolators, and sensor front-ends in 24 V-sourced chassis. Its 3.0-5.5 V supply tolerance lets it ride through noisy DC rails without complex regulation, while the 128-byte RAM and 3.5 KB OTP cover typical ladder-replacement logic for pumps, conveyors, and HVAC dampers. The fully static core lets the clock stop in standby, dropping system current to single-digit microamps during idle periods. Engineers should add an external watchdog timer and bulk decoupling per Microchip's PIC16C6x hardware design checklist for factory-floor reliability.
Recommended
Automotive Body Electronics
The PIC16LC64A-04/L operates across -40C to +85C and integrates 33 I/O pins, which map directly to body-control tasks such as mirror adjustment, lighting drivers, and seat-memory switches. Its 4 MHz core and 15 uA active current keep quiescent drain low in always-on automotive networks, and the PLCC-44 package supports selective solder-through-hole reflow profiles used in under-dash modules. The 3.5 KB OTP code space accommodates typical BCM subroutines with room for diagnostic routines. AEC-Q100 qualification should be confirmed at the variant level before production release in passenger-vehicle subsystems.
Recommended
Building Automation & HVAC
Building-automation controllers use the PIC16LC64A-04/L to handle multiple sensor inputs (temperature, humidity, occupancy) and actuator outputs (fans, dampers, valves) within a single 44-pin package. The wide 3.0-5.5 V supply range is convenient for 24 VAC-derived DC rails, and the OTP program memory prevents inadvertent firmware erasure during field service. With 35 single-word instructions, the 4 MHz core executes control loops in well under a millisecond, supporting PID loops for zone temperature regulation. The PIC16C6x timer and capture peripherals simplify zero-cross detection for triac-driven AC loads.
Recommended
Low-Power Sensor Hubs
Battery-powered sensor hubs benefit from the PIC16LC64A-04/L's static CMOS design, which lets the system clock be gated to sub-1 uA standby. The PIC16C6x timers can wake the core from sleep on a GPIO change or overflow, enabling duty-cycled sensing schedules that extend battery life into the multi-year range. The 33 I/O lines accommodate multi-channel ADC scanning via external ADC plus on-chip comparators. Production OTP programming locks firmware against tampering, suitable for metering deployments where field upgrade risk outweighs the benefit of Flash flexibility.
Recommended
Consumer Appliance Control
White-goods controllers in washing machines, dishwashers, and microwave ovens leverage the PIC16LC64A-04/L's 33 I/O to drive seven-segment displays, keypads, and motor-control triacs from a single MCU. The 3.5 KB OTP fits typical appliance state machines plus diagnostic subroutines for service mode. Industrial temperature ratings and a wide supply range tolerate the warm enclosures of kitchen equipment and the noise of universal-motor PWM. Designers appreciate the compatibility of the LC64A pinout with PIC16F74 prototypes that accelerate firmware bring-up.
Recommended
Communication Front-End & Modem Glue
For legacy serial-communication front ends (RS-232/RS-485 protocol converters, modem glue logic, simple protocol bridges), the PIC16LC64A-04/L provides ample UART modules and interrupt flexibility to handle framing, retransmission, and watchdog duties. The 4 MHz clock is adequate for bit-banged half-duplex protocols at common 9.6 to 115.2 kbaud rates. The wide supply range lets the device share 3.3 V or 5 V rails with mixed-logic PHYs without level shifters. OTP code ensures design IP is not easily extracted from deployed units, an advantage for industrial gateways.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LC64A-04/L — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C64A-04/L | PIC16CR64A-04/L | PIC16LC65A-04I/L |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | PLCC-44 | PLCC-44 - same | PLCC-44 - same | PLCC-44 - same |
| Maximum Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Program Memory | 3.5 KB OTP | 3.5 KB ROM | ROM-less (external memory bus) | 4 KB OTP |
| Data RAM | 128 bytes | 128 bytes | 128 bytes | 192 bytes |
| Number of I/O Pins | 33 | 33 | 33 | 33 |
| Supply Voltage Range | 3.0 V to 5.5 V | 4.5 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V |
| Memory Type | OTP EPROM | Mask ROM | ROM-less | OTP EPROM |
Key Differentiators
- OTP EPROM with 3.5 KB code space (vs PIC16C64A-04/L)
- Wide 3.0-5.5 V supply including low-power CMOS (vs PIC16C64A-04/L)
- Single-supply 33 I/O with broad peripheral set (vs PIC16LC65A-04I/L)
Design Notes
Place a 100 nF decoupling capacitor within 5 mm of the Vdd pin (pin 20) and a bulk 10 uF aluminum-polymer capacitor on the supply rail. The PIC16LC64A-04/L draws 15 uA typical at 5 V/4 MHz active per Microchip family data; Vdd droop during high-I/O switching can cause spurious resets if bulk capacitance is undersized. Consider a low-Iq LDO such as MCP1702 for battery applications where the input rail is shared with RF or motor loads.
Because the PIC16LC64A-04/L uses OTP EPROM, in-system firmware upgrades are impossible once the device is programmed. Reserve a sufficient code margin (target ~70 percent of 3.5 KB) and code-protect unused areas. For field-serviceable designs, prototype with the Flash-based PIC16F74-I/L in the same PLCC-44 footprint and only transition to OTP after firmware freeze. Always confirm MCLR pull-up resistor value (typically 10 kOhm) to prevent leakage-induced resets in low-power circuits.
Route the oscillator traces (OSC1 pin 9, OSC2 pin 10) as short, symmetric traces and guard them from switching signals. Use a four-layer stack-up with a continuous ground plane beneath the PLCC-44 footprint to reduce EMI susceptibility on the 33 I/O pins. Keep ICSP pins RB6 (pin 27) and RB7 (pin 28) accessible on the PCB edge or test pads; otherwise, in-circuit programming during manufacturing becomes difficult, forcing socketed programming which adds cost.
Compliance Information
RoHS, REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals status not present in the verified web data and should be confirmed against the Microchip PIC16C6x environmental compliance letter before volume production.
