PIC16C65A-20E/L - 8-Bit 20MHz OTP MCU 7KB Flash | Microchip | PLCC-44
MPN: PIC16C65A-20E/L ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $9.85 | $9.85 |
| 10 | $8.94 | $89.40 |
| 100 | $7.62 | $762.00 |
| 500 | $6.85 | $3,425.00 |
| 1,000 | $6.2 | $6,200.00 |
PIC16C65A-20E/L Overview
An 8-bit microcontroller is a single-chip computer that integrates a CPU, memory, and I/O peripherals on a single silicon die. The PIC16CXX family is built around a RISC (Reduced Instruction Set Computer) Harvard architecture that executes 35 single-word instructions, with all instructions completing in one instruction cycle except program branches (two cycles). Within the broader taxonomy, PIC16C65A sits at: 8-bit MCU -> microcontroller -> embedded controller -> semiconductor IC. This MCU category bridges discrete logic and full microprocessors, enabling dedicated control functions in cost-sensitive embedded systems.
Key features include 20MHz maximum operating frequency, support for I2C, SPI, and UART/USART serial connectivity, low-power CMOS EPROM/ROM technology with 5V/4MHz typical current of 15uA and 3V/32kHz typical current of 1uA, and a wide operating voltage range up to 6.0V. The PIC16C65A's Harvard architecture separates program and data memory buses, allowing instruction fetch and operand access to occur in parallel - improving throughput compared with single-cored-memory CISC designs of equivalent clock speed.
Typical applications include industrial control systems, automotive body and chassis electronics (AEC-Q100 not formally qualified on this part number; consult -I or -E temp grade parts), consumer appliance controllers, and embedded serial-communication hubs. The 33-pin I/O count and three serial peripherals make it well suited as a bridging controller between UART-based host processors and SPI/I2C sensor clusters.
When designing with the PIC16C65A-20E/L, ensure oscillator start-up time is respected for crystal or resonator circuits and that decoupling capacitors are placed within 5mm of VDD/VSS pins. OTP memory cannot be re-programmed; choose a flash-based PIC16F equivalent if in-field firmware updates are required.
Drop-in alternatives for PIC16C65A-20E/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 PIC16C65A-20E/L (same form factor and footprint) — differing in Package, Program Memory Size, Core Architecture, Maximum Clock Frequency, Program Memory Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16C65A-20/L
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C65A-04E/L
✅ Drop-In✓ In Stock
$11.2 / Unit
View Datasheet →PIC16C65A-04/P
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$8.1 / Unit
View Datasheet →PIC16C65A-04I/P
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$5.25 / Unit
View Datasheet →PIC16C65A-10/PQ
✅ Drop-In✓ In Stock
$6.1 / Unit
View Datasheet →PIC16C65A-20E/L Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit RISC (Harvard) |
| Instruction Set | 35 single-word instructions |
| Program Memory | 7 KB (4K x 14) OTP |
| RAM | 192 bytes |
| Maximum Clock Frequency | 20 MHz |
| Operating Voltage Range | 2.5 V to 6.0 V |
| I/O Pins | 33 |
| Package | 44-pin PLCC (16.59 x 16.59 mm) |
| Mounting Type | Surface Mount |
| Serial Connectivity | I2C, SPI, UART/USART |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
| Typical Current at 5V/4MHz | 15 uA |
| Typical Current at 3V/32kHz | 1 uA |
| Temperature Grade | Extended (-40C to +125C) |
PIC16C65A-20E/L Pin Configuration
| Pin 1 | MCLR/VPP — Master Clear (reset) input / programming voltage |
| Pin 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Pin 4 | RA2/AN2 — PORTA bit 2 / analog input 2 |
| Pin 5 | RA3/AN3/VREF — PORTA bit 3 / analog input 3 / voltage reference |
| Pin 6 | RA4/T0CKI — PORTA bit 4 / Timer 0 clock input |
| Pin 7 | RA5/SS/AN4 — PORTA bit 5 / SPI slave select / analog input 4 |
| Pin 8 | RE0/RD/AN5 — PORTE bit 0 / read control / analog input 5 |
| Pin 9 | RE1/WR/AN6 — PORTE bit 1 / write control / analog input 6 |
| Pin 10 | RE2/CS/AN7 — PORTE bit 2 / chip select / analog input 7 |
| Pin 11 | VDD — Positive supply voltage |
| Pin 12 | VSS — Ground reference |
| Pin 13 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| Pin 14 | OSC2/CLKOUT — Oscillator crystal output / clock output |
| Pin 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Pin 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / Capture-Compare-PWM 2 |
| Pin 17 | RC2/CCP1 — PORTC bit 2 / Capture-Compare-PWM 1 |
| Pin 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pin 19 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pin 20 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pin 21 | RC6/TX/CK — PORTC bit 6 / UART transmit / USART clock |
| Pin 22 | RC7/RX/DT — PORTC bit 7 / UART receive / USART data |
| Pin 23 | RB0/INT — PORTB bit 0 / external interrupt |
| Pin 24 | RB1 — PORTB bit 1 |
| Pin 25 | RB2 — PORTB bit 2 |
| Pin 26 | RB3/PGM — PORTB bit 3 / low-voltage programming |
| Pin 27 | RB4 — PORTB bit 4 |
| Pin 28 | RB5 — PORTB bit 5 |
| Pin 29 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 30 | RB7/PGD — PORTB bit 7 / ICSP data |
| Pin 31 | VSS — Ground reference |
| Pin 32 | RD0 — PORTD bit 0 |
| Pin 33 | RD1 — PORTD bit 1 |
| Pin 34 | RD2 — PORTD bit 2 |
| Pin 35 | RD3 — PORTD bit 3 |
| Pin 36 | RD4 — PORTD bit 4 |
| Pin 37 | RD5 — PORTD bit 5 |
| Pin 38 | RD6 — PORTD bit 6 |
| Pin 39 | RD7 — PORTD bit 7 |
| Pin 40 | VSS — Ground reference (PLCC exposed pad) |
| Pin 41 | VSS — Ground reference |
| Pin 42 | VSS — Ground reference |
| Pin 43 | VSS — Ground reference |
| Pin 44 | NC — Not connected (per datasheet pinout) |
Typical Applications
PIC16C65A-20E/L is suitable for 6 applications: Industrial Process Control, Serial Communication Bridging Hub, Consumer Appliance Controller, Automotive Body Electronics (Non-Safety), Embedded Sensor Array Interface, Vintage Computing Peripheral Controller.
Industrial Process Control
The PIC16C65A-20E/L is a strong fit for industrial process control systems requiring deterministic 8-bit computation in harsh environments. The 'E' suffix confirms an extended -40C to +125C temperature grade that tolerates factory floor heat near motors and drives. With 20 MIPS throughput, the device can sample analog inputs, run PID control loops, and drive PWM outputs to valves or motor controllers in real time. Integrated Brown-out Detect/Reset and Watchdog Timer protect against supply glitches and firmware lockups - both critical failure modes in unattended industrial installations. The 33 I/O pins handle digital sensors, keypad inputs, and relay outputs without external logic.
Recommended
Serial Communication Bridging Hub
The PIC16C65A-20E/L excels as a serial protocol bridge between UART, SPI, and I2C peripherals. With all three serial channels integrated, the MCU converts between asynchronous UART traffic from a host processor and synchronous SPI/I2C sensors or displays - eliminating external bridge ICs. The 192-byte RAM is sufficient for buffering modest message frames, while 7KB of OTP program memory holds protocol stacks for typical industrial or consumer bridging applications. At 20 MHz, the core can sustain 115200 bps UART traffic plus SPI transactions at 5 MHz without CPU overload.
Recommended
Consumer Appliance Controller
Consumer appliances such as washing machines, dishwashers, and HVAC indoor units benefit from the PIC16C65A-20E/L's combination of low cost, OTP memory, and integrated peripherals. The 33 I/O pins drive segment displays, keypads, relays, and triac-fired motor loads directly. Brown-out Detect/Reset handles noisy rectified mains rails, while the Watchdog Timer recovers from firmware lockups caused by EMI from switching solenoids. OTP memory prevents end users from tampering with appliance firmware - a security advantage over flash-based parts in this market segment.
Recommended
Automotive Body Electronics (Non-Safety)
Non-safety automotive body electronics - such as seat controllers, mirror adjusters, climate control panels, and interior lighting - are well served by the PIC16C65A-20E/L. The extended -40C to +125C temperature grade survives cabin and under-hood thermal cycling, while OTP memory locks the firmware to prevent unauthorized modification of body-controller behavior. The PWM peripheral drives LED dimmers and small motor loads, while UART/SPI/I2C connectivity links to body-domain CAN/LIN gateways. Note: this part number is not formally AEC-Q100 qualified - validate with Microchip for safety-critical body applications.
Recommended
Embedded Sensor Array Interface
The PIC16C65A-20E/L acts as a sensor hub in embedded systems where multiple I2C/SPI sensors must be polled and aggregated for a host processor. The 33 I/O pins accept interrupt lines from sensor clusters, while the SPI channel interfaces to high-speed accelerometers or gyroscopes. The 7KB OTP program memory accommodates sensor drivers and a basic data-routing protocol stack. At 20 MHz, the device can poll up to 10 I2C sensors at 400 kHz while maintaining a 115200 bps UART uplink to a host - useful in robotics and IoT edge nodes.
Recommended
Vintage Computing Peripheral Controller
Retro-computing enthusiasts and restoration projects benefit from the PIC16C65A-20E/L as a programmable peripheral controller. The PIC16C family was contemporary with late-1980s and 1990s industrial computing equipment, making this OTP part historically appropriate for repairing legacy systems that demand period-correct silicon. The UART/SPI peripherals can emulate older serial protocols or interface modern SD card readers to vintage CPUs, while the 20 MHz clock matches the era's mid-range controller performance envelope.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C65A-20E/L — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C65A-20/L | PIC16C65A-04E/L | PIC16C65A-10/PQ | PIC16C65A-04/P | PIC16C65A-04I/P |
|---|---|---|---|---|---|---|
| Package | 44-PLCC (L) | 44-PLCC (L) - same | 44-PLCC (L) - same | 44-PLCC (L) - same | DIP-40 - cross-package | DIP-40 - cross-package |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 4 MHz | 10 MHz | 4 MHz | 4 MHz |
| Program Memory | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP |
| Temperature Grade | Extended (-40C to +125C) | Commercial (0C to +70C) | Extended (-40C to +125C) | Commercial (0C to +70C) | Commercial (0C to +70C) | Industrial (-40C to +85C) |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 |
| Serial Peripherals | UART, SPI, I2C | UART, SPI, I2C | UART, SPI, I2C | UART, SPI, I2C | UART, SPI, I2C | UART, SPI, I2C |
| Memory Type | OTP (one-time programmable) | OTP | OTP | OTP | OTP | OTP |
Key Differentiators
- Extended temperature grade for industrial and harsh-environment deployments (vs PIC16C65A-20/L)
- Maximum 20 MHz throughput for compute-intensive control loops (vs PIC16C65A-04E/L)
- Three integrated serial peripherals in a single MCU (vs PIC16C65A-04/P (DIP-40 variant))
Design Notes
Estimated: at 20 MHz and 5V VDD, the PIC16C65A core draws approximately 15 mA plus I/O pin current. Total system current is dominated by I/O loading rather than core consumption for OTP CMOS MCUs in this family. Place a 100 nF decoupling capacitor within 5 mm of VDD (pin 11) and VSS (pin 12), plus a bulk 10 uF tantalum or ceramic capacitor on the same rail. Multiple VSS pins on the PLCC package should all be connected to a low-impedance ground plane.
For crystal or ceramic resonator operation, connect a fundamental-mode 20 MHz resonator between OSC1 (pin 13) and OSC2 (pin 14) with appropriate load capacitors per the resonator manufacturer's datasheet (typically 15-33 pF). For external clock input, drive OSC1 directly and leave OSC2 floating. LP, XT, HS, and RC oscillator modes are selected by configuration fuse bits - HS mode is required for 20 MHz operation.
OTP memory on the PIC16C65A can be programmed only once - there is no in-field firmware upgrade path. If you need to iterate firmware, evaluate the flash-based PIC16F74 in the same 44-PLCC footprint. Also note that the MCLR pin (pin 1) requires a proper reset circuit; a 10 kohm pull-up to VDD with optional 100 nF capacitor to ground provides noise-immune reset behavior. Brown-out Detect must be enabled in the configuration word to protect against supply droop.
The PIC16C65A in PLCC-44 has moderate power dissipation; at full I/O load and 20 MHz operation, internal dissipation typically stays under 200 mW - well within the PLCC's thermal envelope. However, ensure the ground plane under the PLCC exposed pad is unbroken for thermal spreading. No external heatsink is required for normal operation. Maximum junction temperature is 150C; respect this limit when designing for high ambient industrial environments.
Compliance Information
RoHS and REACH compliance not explicitly stated in verified distributor listings reviewed. PIC16C family parts were originally released before RoHS became mandatory for many applications; later production runs are typically lead-free but should be verified with Microchip's environmental compliance documentation. This part number is not formally AEC-Q100 qualified - the 'E' suffix denotes extended temperature grade only, not automotive qualification. For AEC-Q100 qualified PIC16 alternatives, refer to PIC16F variants with the '-IQ' automotive designation.
