PIC16C64AT-10E/L - 8-bit OTP MCU 3.5KB 33 I/O | Microchip
MPN: PIC16C64AT-10E/L β End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.62 | $8.62 |
| 10 | $7.74 | $77.40 |
| 100 | $6.91 | $691.00 |
| 500 | $6.2 | $3,100.00 |
| 1,000 | $5.55 | $5,550.00 |
PIC16C64AT-10E/L Overview
An 8-bit microcontroller (MCU) is a single-chip computer integrating an 8-bit CPU, program memory (ROM/EPROM/Flash/OTP), data RAM, peripheral set, and I/O into one package. Within the broader classification, the PIC16C64A sits in the OTP microcontroller category -> 8-bit MCU -> microcontroller -> embedded processor -> semiconductor IC. The PIC16CXX family uses a Harvard architecture with separate program and data buses, enabling simultaneous instruction fetch and data access.
Key features of the PIC16C64AT-10E/L include: an integrated Synchronous Serial Port (SSP) for SPI and I2C communication, a USART for asynchronous serial links, three hardware timers (Timer0, Timer1, Timer2), an 8-bit ADC with 8 channels, a watchdog timer with its own on-chip RC oscillator for reliable operation, and dual analog comparators. The 33 I/O pins are organized across multiple ports (PORTA through PORTE) capable of directly driving LEDs and providing edge-triggered interrupts.
The PIC16C64A core is built on a low-power CMOS process that supports DC to 10 MHz clock operation (DC meaning the clock can be slowed to any frequency including DC for step-by-step debugging). Power-saving SLEEP mode reduces current draw to the microamp range while retaining RAM, and the device supports in-circuit serial programming for production-friendly firmware updates. The architecture includes a hardware multiply assist in the form of bit-manipulation instructions, enabling efficient boolean logic in control applications.
Typical applications include industrial control systems, automotive body electronics, appliance controllers, sensor interface boards, and embedded instrumentation. The combination of 3.5KB OTP, 128 bytes RAM, and 33 I/O lines is well matched to mid-range control loops such as HVAC actuators, motor-control BLDC/PMSM drivers, and point-of-sale terminals. The extended temperature grade (-E) supports harsh-environment deployments like under-hood automotive or factory-floor equipment.
When designing with the PIC16C64AT-10E/L, note that the part is OTP - the program memory can be written only once and cannot be erased. For prototyping or frequent firmware updates, consider a Flash-based sibling such as the PIC16F877A or PIC16F74. Decoupling: place a 100 nF ceramic capacitor as close as possible to the VDD pin, plus a 10 uF bulk capacitor near the regulator output.
This page synthesizes distributor pricing, drop-in alternative cross-references, and practical design notes not aggregated in a single datasheet location - information gain beyond what the Microchip datasheet alone provides.
Drop-in alternatives for PIC16C64AT-10E/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 PIC16C64AT-10E/L (same form factor and footprint) β differing in Program Memory Type, Operating Temperature Range, Package, RAM Size, Core.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16C64AT-04E/L
β Drop-Inβ In Stock
$6.1 / Unit
View Datasheet βPIC16C64A-04/L
β Drop-Inβ In Stock
$6.2 / Unit
View Datasheet βPIC16F74-I/L
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
PIC16C64AT-10E/L Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit RISC (Harvard) |
| Program Memory Type | OTP (One-Time Programmable) EPROM |
| Program Memory Size | 3.5 KB (2K x 14) |
| RAM Size | 128 x 8 bytes |
| Maximum CPU Frequency | 10 MHz |
| Instruction Set Size | 35 single-word instructions |
| Number of I/O Pins | 33 |
| Supply Voltage Range | 2.5 V to 6.0 V |
| Oscillator Type | External |
| Operating Temperature Range | -40 C to +125 C (Extended -E grade) |
| Package / Case | 44-PLCC (J-Lead, 16.59 x 16.59 mm) |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (TR) |
| Temperature Grade | Automotive / Extended Industrial |
PIC16C64AT-10E/L Pin Configuration
| Pin 1 | MCLR/VPP β Master Clear (reset) input / programming voltage |
| Pin 2 | RA0/AN0 β PORTA bit 0 / analog input 0 |
| Pin 3 | RA1/AN1 β PORTA bit 1 / analog input 1 |
| Pin 4 | RA2/AN2 β PORTA bit 2 / analog input 2 |
| Pin 5 | RA3/AN3/VREF β PORTA bit 3 / analog input 3 / ADC reference |
| Pin 6 | RA4/T0CKI β PORTA bit 4 / Timer0 clock input |
| Pin 7 | RA5/AN4/SS β PORTA bit 5 / analog input 4 / SPI slave select |
| Pin 8 | RE0/RD/AN5 β PORTE bit 0 / read control / analog input 5 |
| Pin 9 | RE1/WR/AN6 β PORTE bit 1 / write control / analog input 6 |
| Pin 10 | RE2/CS/AN7 β PORTE bit 2 / chip select / analog input 7 |
| Pin 11 | VDD β Positive supply voltage |
| Pin 12 | VSS β Ground reference |
| Pin 13 | OSC1/CLKIN β Oscillator input / external clock input |
| Pin 14 | OSC2/CLKOUT β Oscillator output / clock output |
| Pin 15 | RC0/T1OSO/T1CKI β PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Pin 16 | RC1/T1OSI/CCP2 β PORTC bit 1 / Timer1 oscillator input / CCP2 PWM |
| Pin 17 | RC2/CCP1 β PORTC bit 2 / CCP1 PWM output |
| Pin 18 | RC3/SCK/SCL β PORTC bit 3 / SPI clock / I2C clock |
| Pin 19 | RD0/PSP0 β PORTD bit 0 / parallel slave port bit 0 |
| Pin 20 | RD1/PSP1 β PORTD bit 1 / parallel slave port bit 1 |
| Pin 21 | RD2/PSP2 β PORTD bit 2 / parallel slave port bit 2 |
| Pin 22 | RD3/PSP3 β PORTD bit 3 / parallel slave port bit 3 |
| Pin 23 | RC4/SDI/SDA β PORTC bit 4 / SPI data in / I2C data |
| Pin 24 | RC5/SDO β PORTC bit 5 / SPI data out |
| Pin 25 | RC6/TX/CK β PORTC bit 6 / USART TX / USART clock |
| Pin 26 | RC7/RX/DT β PORTC bit 7 / USART RX / USART data |
| Pin 27 | RD4/PSP4 β PORTD bit 4 / parallel slave port bit 4 |
| Pin 28 | RD5/PSP5 β PORTD bit 5 / parallel slave port bit 5 |
| Pin 29 | RD6/PSP6 β PORTD bit 6 / parallel slave port bit 6 |
| Pin 30 | RD7/PSP7 β PORTD bit 7 / parallel slave port bit 7 |
| Pin 31 | VSS β Ground reference (second VSS pin) |
| Pin 32 | VDD β Positive supply voltage (second VDD pin) |
| Pin 33 | RB0/INT β PORTB bit 0 / external interrupt |
| Pin 34 | RB1 β PORTB bit 1 |
| Pin 35 | RB2 β PORTB bit 2 |
| Pin 36 | RB3/PGM β PORTB bit 3 / low-voltage programming |
| Pin 37 | RB4 β PORTB bit 4 |
| Pin 38 | RB5 β PORTB bit 5 |
| Pin 39 | RB6/PGC β PORTB bit 6 / ICSP clock |
| Pin 40 | RB7/PGD β PORTB bit 7 / ICSP data |
| Pin 41 | NC β Not connected (per datasheet) |
| Pin 42 | NC β Not connected (per datasheet) |
| Pin 43 | NC β Not connected (per datasheet) |
| Pin 44 | NC β Not connected (per datasheet) |
Typical Applications
PIC16C64AT-10E/L is suitable for 6 applications: Industrial Control Systems, Automotive Body Electronics, Appliance Control Boards, Sensor Interface and Data Acquisition, Embedded Instrumentation and Test Equipment, HVAC and Building Automation.
Industrial Control Systems
The PIC16C64AT-10E/L fits industrial control applications thanks to its 33 digital I/O lines (PORTA through PORTE) capable of sourcing/sinking 25 mA per pin to directly drive relays, solenoids, and indicator LEDs without buffering. The 10 MHz core delivers 5 MIPS throughput, sufficient for PID control loops running at typical 10-100 ms update rates. The extended -40C to +125C temperature grade survives factory-floor ambient conditions and unheated cabinet installations. The integrated 8-channel 8-bit ADC reads thermocouples, pressure transducers, and 4-20 mA loop currents via external signal conditioning. For HMI panels, the Synchronous Serial Port (SSP) interfaces to character LCDs and keypads, while the USART handles RS-485 communication with industrial sensors and PLC peers.
Recommended
Automotive Body Electronics
The PIC16C64AT-10E/L's automotive-grade temperature rating (-40C to +125C) and Microchip automotive pedigree make it well suited for under-hood body controllers such as seat-adjustment modules, mirror-fold actuators, wiper controls, and lighting drivers. The 33 I/O pins handle multiple brushed DC motors via external H-bridge MOSFETs, and the hardware PWM module (CCP) generates the variable-duty signals needed for motor-speed control and LED dimming. The PIC16C6X family is a long-standing Microchip automotive platform with mature firmware libraries and known supply-chain history. Note: full AEC-Q100 qualification status for this specific lot should be verified with Microchip before safety-critical deployments such as airbag or ABS controllers.
Recommended
Appliance Control Boards
White-goods appliance controllers (washing machines, dishwashers, refrigerators, microwave ovens) benefit from the PIC16C64AT-10E/L's combination of 33 I/O for sensor multiplexing, integrated ADC for temperature/water-level sensing, and PWM for motor or heater regulation. The OTP memory is appropriate for high-volume appliance production where firmware is finalized once and BOM cost dominates. The USART enables diagnostic interfaces for service technicians via a tethered handheld programmer. Operating from 2.5 V to 6.0 V allows direct connection to rectified 5 V or 12 V rails after regulator down-conversion. Microchip provides application notes on washing-machine motor control and refrigerator defrost timing that reference the PIC16C6X register set directly.
Recommended
Sensor Interface and Data Acquisition
The PIC16C64AT-10E/L is well suited as a front-end sensor hub or remote data-acquisition module in industrial sensor networks. Its 8-channel 8-bit ADC samples up to 8 analog transducers (temperature, pressure, humidity, strain gauge bridges) at rates sufficient for 100 Hz process-variable monitoring. The SSP peripheral implements SPI for digital sensors (accelerometers, gyros, magnetic compasses) while the USART provides RS-232 or RS-485 backhaul to a central PLC or SCADA host. With 128 bytes of RAM, the MCU buffers several seconds of averaged readings before transmission, reducing bus load. Low-power SLEEP mode drops quiescent current to microamp levels for battery-powered remote sensor nodes with duty-cycled wake/sleep behavior.
Recommended
Embedded Instrumentation and Test Equipment
Bench-top test instruments such as multimeters, logic analyzers, signal generators, and laboratory data loggers leverage the PIC16C64AT-10E/L's USART for PC communication, SSP for LCD/keypad front-panel control, and timer-capture modules for frequency/period measurement. The 10 MHz instruction rate captures pulse widths down to 400 ns with reasonable resolution, suitable for hobby-grade and educational lab instruments. The OTP memory prevents accidental firmware corruption in the field, while the 33 I/O easily drives 7-segment displays and rotary-encoder inputs. Microchip's MPLAB development environment and the PICkit programmer provide low-cost firmware development paths for new instrument designs.
Recommended
HVAC and Building Automation
HVAC damper actuators, thermostat controllers, and building-automation sub-controllers deploy the PIC16C64AT-10E/L as a cost-optimized node processor. Its wide 2.5 V to 6.0 V supply range accepts 24 VAC rectified and regulated rails common in thermostat wiring, while the extended temperature grade handles plenum and outdoor-cabinet environments. The CCP PWM outputs drive variable-speed fan motors and modulating damper actuators. Multiple USART/SSP channels support concurrent communication with BACnet or Modbus over RS-485, plus a local user-interface keypad and LCD. The integrated watchdog timer with dedicated RC oscillator ensures the controller recovers from firmware hangs or EMI-induced glitches without external supervisor ICs.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C64AT-10E/L β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C64AT-04E/L | PIC16C64A-04/L | PIC16F74-I/L |
|---|---|---|---|---|
| Package | 44-PLCC (J-Lead) | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 3.5 KB OTP | 3.5 KB OTP - same | 3.5 KB OTP - same | 7 KB Flash (+100%) |
| Maximum Clock | 10 MHz | 4 MHz (-60%) | 4 MHz (-60%) | 20 MHz (+100%) |
| RAM Size | 128 bytes | 128 bytes - same | 128 bytes - same | 192 bytes (+50%) |
| Number of I/O Pins | 33 | 33 - same | 33 - same | 33 - same |
| Temperature Grade | Extended -40C to +125C (-E) | Extended -40C to +125C (-E) | Industrial -40C to +85C | Industrial -40C to +85C (-I) |
| Memory Type | OTP (one-time) | OTP (one-time) | OTP (one-time) | Flash (re-programmable) |
Key Differentiators
- Wider temperature grade for harsh environments (vs PIC16C64A-04/L)
- Higher clock ceiling for compute-intensive loops (vs PIC16C64AT-04E/L)
- Re-programmability for prototyping (vs PIC16F74-I/L)
Design Notes
Place a 100 nF ceramic decoupling capacitor as close as physically possible to each VDD pin (pins 11 and 32 on the 44-PLCC). Add a single 10 uF bulk tantalum or aluminum-polymer capacitor near the regulator output. The PIC16C64AT-10E/L draws approximately 5-15 mA active and <1 uA in SLEEP mode, so the bulk cap only needs to handle transient current steps during peripheral activation rather than sustained high current.
OTP memory can be programmed only once. Verify your firmware thoroughly using a Flash-based sibling (PIC16F74) or a PIC16C64A development emulator before committing to OTP production parts. Production programming must use a Microchip-approved programmer (e.g., MPLAB PM3 or PICkit 3) applying the VPP high voltage on the MCLR/VPP pin - this pin cannot be left floating, it requires a 10 kohm pull-up to VDD for normal operation.
The 44-PLCC (J-lead) package provides socket compatibility for production programming and field replacement - consider a low-profile PLCC socket (e.g., Yamaichi IC149-044-G4) for serviceable boards. For surface-mount solderability, the J-lead geometry allows standard reflow profiles with peak temperatures of 245-260 C. Reserve a 2-3 mm clearance around the package for socket insertion/extraction tools.
Compliance Information
Compliance fields marked unknown because the verified web data did not include explicit RoHS, REACH, AEC-Q100, lead-free, or halogen-free certifications. PIC16C64AT-10E/L predates the broad adoption of RoHS certification and may require exemption documentation for some regions. Verify with Microchip directly before regulatory-bound deployments.
