PIC16LC65AT-04/L - 8-Bit PIC MCU, 7KB EPROM, 44-PLCC | Microchip
MPN: PIC16LC65AT-04/L ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $11.5 | $11.50 |
| 10 | $10.2 | $102.00 |
| 100 | $9.05 | $905.00 |
| 500 | $8.2 | $4,100.00 |
| 1,000 | $7.45 | $7,450.00 |
PIC16LC65AT-04/L Overview
What is an 8-bit microcontroller? An 8-bit MCU is a single-chip computer with an 8-bit data path that fetches, decodes, and executes instructions stored in program memory; it integrates a CPU, RAM, ROM/EPROM/Flash, timers, digital I/O, and communication peripherals on one die. The PIC architecture falls within the broader taxonomy of microcontroller -> embedded controller -> semiconductor. The PIC16CXX mid-range family uses a 14-bit instruction word and a RISC core with only 35 single-word instructions, delivering deterministic single-cycle execution (except for program branches which take two cycles).
Key features of the PIC16LC65AT-04/L include 4 MHz maximum clock input, integrated analog comparator module, USART/SPI/I2C serial interfaces (peripheral functions selectable on multi-function pins), 8-bit ADC (12 channels on the 'LC65A), three timers (Timer0/Timer1/Timer2), and a programmable watchdog timer with on-chip RC oscillator for reliable operation without external components. Power management features include SLEEP mode with wake-up via interrupts and an internal brown-out reset (BOR) circuit on selected variants.
Designers should note the 'LC' prefix denotes the low-voltage CMOS process, drawing roughly half the supply current of the standard 'C' version and supporting operation down to 3.0V. The 'L' trailing suffix indicates the package style (PLCC here); the 'T' mid-suffix indicates tape-and-reel packaging and the '-04' speed grade marks the 4 MHz maximum clock. The PIC16LC65AT-04/L is pin-compatible with the PIC16C65AT-04/L and PIC16F65 family members, allowing hardware reuse across OTP and Flash-based designs.
Typical applications include industrial control systems, remote sensor data acquisition, low-power telemetry, appliance controllers, automotive body electronics (non-safety), and instrument panels. The combination of low-voltage operation, multiple serial interfaces, and generous digital I/O suits networked sensor nodes and human-machine interface (HMI) sub-systems.
When designing with this MCU, engineers should place a 0.1 uF decoupling capacitor close to the VDD pins, route the MCLR reset line to a controlled pull-up network, and verify unused I/O pins are configured as outputs to minimise quiescent current. The 44-PLCC footprint is large by current standards but still used in legacy industrial systems where socketed replacement of the OTP part is desirable.
This page synthesises distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, helping procurement and embedded engineers rapidly assess PIC16LC65AT-04/L suitability for both new designs and legacy field replacements.
Drop-in alternatives for PIC16LC65AT-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 PIC16LC65AT-04/L (same form factor and footprint) — differing in ADC, Core Architecture, Package, Program Memory Type, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16C65AT-04/L
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LC65A-04/L
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C65A-04/L
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$9.2 / Unit
View Datasheet →PIC16C65B-04/L
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC16LC64AT-04/L
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$8.3 / Unit
View Datasheet →PIC16LC65AT-04/L Maximum Ratings & Electrical Characteristics
| Product Family | PIC16CXX mid-range 8-bit MCU |
| Core Architecture | 8-bit RISC |
| Program Memory | 7 KB OTP EPROM |
| Data Memory (RAM) | 192 bytes |
| Maximum Clock Frequency | 4 MHz |
| Supply Voltage Range | 3.0 V to 5.5 V |
| I/O Pins | 33 |
| Timers | 3 (Timer0, Timer1, Timer2) |
| ADC | 8-bit, up to 12 channels |
| Serial Interfaces | USART, SPI, I2C |
| Package | 44-pin PLCC (windowed/ceramic, MO-058) |
| Instruction Set | 35 single-word instructions, 14-bit width |
| Power-Saving Modes | SLEEP mode with peripheral interrupt wake-up |
| Watchdog Timer | Yes, with on-chip RC oscillator |
| Program Memory Type | OTP (One-Time Programmable) |
| Mounting Type | Surface Mount |
PIC16LC65AT-04/L Pin Configuration
| Pin 1 | MCLR/VPP — Master Clear reset input / programming voltage input |
| Pin 2 | RA0/AN0 — Port A bit 0 / analog channel 0 |
| Pin 3 | RA1/AN1 — Port A bit 1 / analog channel 1 |
| Pin 4 | RA2/AN2 — Port A bit 2 / analog channel 2 |
| Pin 5 | RA3/AN3/VREF — Port A bit 3 / analog channel 3 / ADC VREF |
| Pin 6 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| Pin 7 | RA5/AN4/SS — Port A bit 5 / analog channel 4 / SPI slave select |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/CLKIN — Oscillator crystal input / external clock in |
| Pin 10 | OSC2/CLKOUT — Oscillator crystal output / clock out |
| 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 / CCP2 I/O |
| 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 | RD0/PSP0 — Port D bit 0 / Parallel Slave Port bit 0 |
| Pin 16 | RD1/PSP1 — Port D bit 1 / Parallel Slave Port bit 1 |
| Pin 17 | RD2/PSP2 — Port D bit 2 / Parallel Slave Port bit 2 |
| Pin 18 | RD3/PSP3 — Port D bit 3 / Parallel Slave Port bit 3 |
| Pin 19 | RD4/PSP4 — Port D bit 4 / Parallel Slave Port bit 4 |
| Pin 20 | RD5/PSP5 — Port D bit 5 / Parallel Slave Port bit 5 |
| Pin 21 | RD6/PSP6 — Port D bit 6 / Parallel Slave Port bit 6 |
| Pin 22 | RD7/PSP7 — Port D bit 7 / Parallel Slave Port bit 7 |
| Pin 23 | VSS — Ground reference |
| Pin 24 | RC4/SDI/SDA — Port C bit 4 / SPI data in / I2C data |
| Pin 25 | RC5/SDO — Port C bit 5 / SPI data out |
| Pin 26 | RC6/TX/CK — Port C bit 6 / USART TX / USART clock |
| Pin 27 | RC7/RX/DT — Port C bit 7 / USART RX / USART data |
| Pin 28 | RE0/RD/AN5 — Port E bit 0 / Parallel Slave Read / analog channel 5 |
| Pin 29 | RE1/WR/AN6 — Port E bit 1 / Parallel Slave Write / analog channel 6 |
| Pin 30 | RE2/CS/AN7 — Port E bit 2 / Parallel Slave Chip Select / analog channel 7 |
| Pin 31 | VDD — Positive supply voltage |
| Pin 32 | RB0/INT — Port B bit 0 / external interrupt input |
| Pin 33 | RB1 — Port B bit 1 |
| Pin 34 | RB2 — Port B bit 2 |
| Pin 35 | RB3 — Port B bit 3 |
| Pin 36 | RB4 — Port B bit 4 |
| Pin 37 | RB5 — Port B bit 5 |
| Pin 38 | RB6 — Port B bit 6 / in-circuit debug clock |
| Pin 39 | RB7 — Port B bit 7 / in-circuit debug data |
| Pin 40 | VDD — Positive supply voltage |
| Pin 41 | VSS — Ground reference |
| Pin 42 | RA6/OSC2 — Port A bit 6 / alternate oscillator out |
| Pin 43 | RA7/OSC1 — Port A bit 7 / alternate oscillator in |
| Pin 44 | NC — Not connected (reserved per datasheet) |
Typical Applications
PIC16LC65AT-04/L is suitable for 6 applications: Industrial Process Control, Remote Telemetry and Sensor Data Acquisition, Appliance Control Panels, Automotive Body Electronics (Non-Safety), Instrumentation and Panel Meters, Smart Card Readers and Security Peripherals.
Industrial Process Control
The PIC16LC65AT-04/L fits industrial process controllers because its 3.0-5.5 V supply range accepts 24 V industrial rails after a simple regulator, its 33 digital I/Os drive relays and inputs, and its USART talks to RS-485 transceivers for long-cable sensor networks. The 7 KB OTP holds PID-control loops plus a Modbus RTU slave stack comfortably. SLEEP mode plus brown-out reset lets the part ride out supply brownouts common on plant floors without losing state. Engineers select the 'LC' variant specifically when rack-mounted controllers must run cool and pull under 2 mA active at 5 V.
Recommended
Remote Telemetry and Sensor Data Acquisition
Battery-powered telemetry nodes benefit from the PIC16LC65AT-04/L's 3.0-5.5 V operation and SLEEP currents under 10 uA, which extend sensor-node lifetime to years on a single lithium pack. The integrated 8-bit ADC (up to 12 channels) reads temperature, pressure, and flow sensors directly without external signal conditioning, while the SPI master drives an external ADC or serial Flash for higher-precision logging. Engineers appreciate the deterministic single-cycle RISC core: predictable timing avoids the jitter that complicates asynchronous serial protocols. Adding a sub-1 mW RF module such as a CC1125 on the SPI bus turns the part into a wireless sensor reader.
Recommended
Appliance Control Panels
Washing-machine, dishwasher, and oven front-panel controllers routinely use PIC16C6X-family parts because the chip offers enough GPIO for 7-segment LED driving, button matrix scanning, and triac/power-relay control. The 7 KB OTP holds state-machine code plus a UART to the main inverter board, and the 33 I/Os split as 8/8/8/8/1 nicely across Port A-E. Engineers prefer the OTP part on tamper-sensitive appliances: code is read-protected via configuration fuses and cannot be cloned with a debugger. The 44-PLCC package remains a tight fit on a crowded appliance PCB, fitting next to electromechanical relays.
Recommended
Automotive Body Electronics (Non-Safety)
Body controllers for window lifts, HVAC blend doors, and seat-position memories use PIC16LC65AT-04/L because the chip tolerates automotive 12 V transients after a regulator and exposes enough I/O for motor-direction H-bridges and Hall-effect position sensors. The integrated USART talks to the body-control CAN bridge, while the 8-bit ADC reads thermistors and current shunts for closed-loop motor control. SLEEP mode plus a watchdog timer lets the ECU sit quiescent until awakened on a CAN or LIN wake-up frame. Designers choose the 'LC' variant for lower quiescent current in always-on body modules.
Recommended
Instrumentation and Panel Meters
Digital panel meters, lab instrument front-ends, and bench-top multimeters use PIC16LC65AT-04/L to read analogue inputs from front-panel BNC connectors via the internal 8-bit ADC, drive multiplexed 7-segment or LCD glass via PORTs, and pipe data to a remote PC via the on-chip USART (RS-232). The 7 KB OTP holds calibration tables, linearisation routines, and a menu-driven UI without external memory. Because instrumentation designers iterate many times during debug, they typically use the Flash-based PIC16F65 for prototypes and switch to the OTP 'LC65A part once firmware is locked. The 44-PLCC package drops into a through-hole prototype board with sockets.
Recommended
Smart Card Readers and Security Peripherals
Secure-access controllers benefit from OTP program memory because the configuration fuses can be locked to prevent code read-out via ICSP, and PIC16LC65AT-04/L supplies a USART (for the host) plus an SPI/I2C master (for the smart card itself). The 33 I/Os handle keypad scanning, indicator LEDs, and electromagnetic-door-strike relays. SLEEP mode plus a watchdog timer limits exposure if a tamper event latches. The low-voltage 3.0-5.5 V operation is convenient for USB-powered readers using a 3.3 V regulator. Engineers appreciate the long-term Microchip product continuity, since security peripherals often stay in production for 10+ years.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LC65AT-04/L — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C65AT-04/L | PIC16LC65A-04/L | PIC16C65A-04/L | PIC16C65B-04/L | PIC16LC64AT-04/L |
|---|---|---|---|---|---|---|
| Package | 44-PLCC (MO-058) | 44-PLCC (MO-058) - same | 44-PLCC (MO-058) - same | 44-PLCC (MO-058) - same | 44-PLCC (MO-058) - same | 44-PLCC (MO-058) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Supply Voltage Range | 3.0 V to 5.5 V | 4.5 V to 5.5 V | 3.0 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 3.0 V to 5.5 V |
| Maximum Clock Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Program Memory | 7 KB OTP EPROM | 7 KB OTP EPROM | 7 KB OTP EPROM | 7 KB OTP EPROM | 7 KB EPROM | 4 KB OTP EPROM |
| RAM Size | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 128 bytes |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 30 |
| Process / Series Prefix | LC (low-voltage CMOS) | C (standard CMOS) | LC (low-voltage CMOS) | C (standard CMOS) | C (standard CMOS) | LC (low-voltage CMOS) |
Key Differentiators
- Low-voltage CMOS process enables 3.0 V battery operation (vs PIC16C65AT-04/L)
- More program memory and I/O than the LC64 cousin (vs PIC16LC64AT-04/L)
- Identical 44-PLCC footprint enables socketed field upgrades (vs PIC16C65A-04/L)
Design Notes
Place a 0.1 uF decoupling capacitor as close as possible to the VDD pins (PLCC pins 31 and 40), plus a 10 uF bulk capacitor on the same supply trace. According to Microchip datasheet 30262D, the PIC16LC65AT-04/L active supply current at 4 MHz and 5 V is typically below 2 mA, but brown-out transitions can briefly draw larger decoupling currents; a low-impedance ceramic cap near the part prevents the MCU from false-resetting during relay switching. Use a low-ESR tantalum or ceramic bulk cap rated for the application's temperature range to keep VDD within 3.0-5.5 V at all times.
The trailing '/L' suffix indicates PLCC package; this is NOT a 44-pin DIP. SMT designs must use the PLCC land pattern (J-leaded outline MO-058). A common mistake is to lay out the PCB for DIP-40 and attempt to drop a /L part on it: pin 1 will short to VSS and the oscillator will not start. Confirm the package drawing before ordering the PLCC socket (or use surface-mount pads with a careful post-solder inspection if sockets are avoided).
Route the MCLR line (pin 1) via a 10 kohm pull-up to VDD and decouple it with 100 nF to ground to avoid spurious resets during in-circuit programming. Keep the OSC1/OSC2 traces short and surrounded by a ground pour to minimise oscillator noise and radiated emissions. Avoid running high-current AC traces beneath the PLCC cavity - the cavity exposes the silicon to thermal cycling and copper pours trap heat. Provide a clear silkscreen marker for pin 1 (bevelled corner) to ease rework and inspection.
Compliance Information
The Microchip part PIC16LC65AT-04/L is from a long-running PIC16C6X family. RoHS/REACH status and lead-free/halogen-free compliance were not confirmed in the verified web data and are listed as 'unknown' pending manufacturer documentation. AEC-Q100 qualification is not stated; do not use in safety-critical automotive systems. Conflict-minerals status is reported as compliant per Microchip corporate policy.
