PIC16C64A-10E/PT - 8-Bit 10MHz 3.5KB OTP MCU | Microchip
MPN: PIC16C64A-10E/PT ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $14.5 | $14.50 |
| 10 | $13.1 | $131.00 |
| 100 | $11.2 | $1,120.00 |
| 500 | $9.85 | $4,925.00 |
| 1,000 | $8.95 | $8,950.00 |
PIC16C64A-10E/PT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral interfaces. Within the broader semiconductor taxonomy, an MCU sits under microprocessor units, then digital ICs, then integrated circuits. The PIC16C64A belongs to the mid-range PIC16C class, which uses a Harvard RISC architecture with separate program and data buses, allowing instruction fetching and data access to occur in the same cycle for predictable deterministic timing.
Key features include 14-bit wide instruction words for compact code density, a hardware multiply option in selected parts, two 8-bit timer/counters with optional prescalers, a 16-bit timer/counter, an 8-bit parallel slave port, a USART serial port, and a watchdog timer with its own on-chip RC oscillator for fail-safe operation. The 33 I/O pins can source/sink up to 25 mA each, making the device suitable for direct LED and relay driving without external buffers.
Architecturally, the PIC16C64A uses a 35 single-word instruction set with most instructions executing in a single 200 ns instruction cycle at 10 MHz (4 clocks per cycle). Its 8-level deep architecture plus hardware stack provides interrupt-driven response. OTP memory requires a one-time programming step during production, distinguishing it from Flash-based PIC16F successors.
Typical applications include industrial control panels, motor control, HVAC fan controllers, automotive body electronics (non-safety), appliance control boards, and embedded instrumentation. The wide 2.5V to 6V operating range accommodates both 3.3V and 5V system designs. When designing, plan OTP programming flow carefully - OTP cannot be erased, so code must be validated on a windowed/Flash equivalent before production programming.
Drop-in alternatives for PIC16C64A-10E/PT — 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 PIC16C64A-10E/PT (same form factor and footprint) — differing in Package, RoHS Status, Timers, Operating Temperature Range, Program Memory Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16C64A-10/PT
✅ Drop-In✓ In Stock
$2.97 / Unit
View Datasheet →PIC16C64A-04I/PT
✅ Drop-In✓ In Stock
$4.61 / Unit
View Datasheet →PIC16C64A-04E/PT
✅ Drop-In✓ In Stock
$7.35 / Unit
View Datasheet →PIC16C65B-10E/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F877A-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C64A-10E/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC (Harvard) |
| Program Memory Size | 3.5 KB (2K x 14) OTP |
| RAM Size | 128 bytes |
| Data EEPROM | 0 bytes (not present) |
| Maximum CPU Frequency | 10 MHz |
| Instruction Cycle Time | 200 ns at 10 MHz |
| Number of I/O Pins | 33 |
| Operating Voltage Range | 2.5 V to 6.0 V |
| Operating Temperature Range | -40 C to +125 C (E grade, extended) |
| Package | 44-pin TQFP (PT), 10x10 mm |
| Timers | Timer0 (8-bit), Timer1 (16-bit), Timer2 (8-bit) |
| Communication Peripherals | USART/SCI, SSP (SPI/I2C) |
| A/D Converter | None (no on-chip ADC) |
| I/O Pin Current (source/sink) | 25 mA per pin |
| Watchdog Timer | Yes, with dedicated RC oscillator |
| Interrupt Sources | Multiple (external, timer, peripheral) |
| Mounting Type | Surface Mount |
| RoHS Status | Non-Compliant (OTP / legacy windowed family) |
PIC16C64A-10E/PT Pin Configuration
| Pin 1 | MCLR/VPP — Master Clear reset input / programming voltage |
| Pin 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 (not used; no ADC) |
| 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 / Timer0 clock input |
| Pin 7 | RA5/SS/AN4 — PORTA bit 5 / SPI slave select / Analog input 4 |
| Pin 8 | RE0/RD/AN5 — PORTE bit 0 / Parallel port read / Analog input 5 |
| Pin 9 | RE1/WR/AN6 — PORTE bit 1 / Parallel port write / Analog input 6 |
| Pin 10 | RE2/CS/AN7 — PORTE bit 2 / Parallel port chip select / Analog input 7 |
| Pin 11 | VDD — Positive supply voltage |
| Pin 12 | VSS — Ground reference |
| Pin 13 | OSC1/CLKIN — Oscillator input / external clock input |
| Pin 14 | OSC2/CLKOUT — Oscillator 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 / CCP2 |
| 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 | RD0/PSP0 — PORTD bit 0 / Parallel slave port bit 0 |
| Pin 20 | RD1/PSP1 — PORTD bit 1 / Parallel slave port bit 1 |
| Pin 21 | RD2/PSP2 — PORTD bit 2 / Parallel slave port bit 2 |
| Pin 22 | RD3/PSP3 — PORTD bit 3 / Parallel slave port bit 3 |
| Pin 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pin 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pin 25 | RC6/TX/CK — PORTC bit 6 / USART TX / clock line |
| Pin 26 | RC7/RX/DT — PORTC bit 7 / USART RX / data line |
| Pin 27 | RD4/PSP4 — PORTD bit 4 / Parallel slave port bit 4 |
| Pin 28 | RD5/PSP5 — PORTD bit 5 / Parallel slave port bit 5 |
| Pin 29 | RD6/PSP6 — PORTD bit 6 / Parallel slave port bit 6 |
| Pin 30 | RD7/PSP7 — PORTD bit 7 / Parallel slave port bit 7 |
| Pin 31 | VSS — Ground reference |
| Pin 32 | VDD — Positive supply voltage |
| Pin 33 | RB0/INT — PORTB bit 0 / External interrupt input |
| Pin 34 | RB1 — PORTB bit 1 |
| Pin 35 | RB2 — PORTB bit 2 |
| Pin 36 | RB3 — PORTB bit 3 |
| Pin 37 | RB4 — PORTB bit 4 |
| Pin 38 | RB5 — PORTB bit 5 |
| Pin 39 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 40 | RB7/PGD — PORTB bit 7 / ICSP data |
| Pin 41 | VSS — Ground reference |
| Pin 42 | VDD — Positive supply voltage |
| Pin 43 | NC — Not connected (per datasheet) |
| Pin 44 | NC — Not connected (per datasheet) |
Typical Applications
PIC16C64A-10E/PT is suitable for 6 applications: Industrial Control Panels, Appliance Control Boards, Automotive Body Electronics (Non-Safety), HVAC Fan and Blower Controllers, Embedded Instrumentation and Data Loggers, Point-of-Sale Terminals and Access Control.
Industrial Control Panels
The PIC16C64A-10E/PT is well suited for industrial control panel applications including HMI keypads, status indicators, and discrete I/O concentrators. With 33 I/O pins each capable of sourcing/sinking 25 mA, the device can directly drive LEDs, small relays, and optocouplers without external buffering. The 10 MHz CPU clock provides 200 ns instruction cycles for real-time scan loops, while the USART enables Modbus RTU or proprietary serial links to PLCs and HMIs. The -40C to +125C extended temperature grade ensures reliable operation inside sealed control cabinets exposed to factory ambient swings. Note that OTP memory requires final code validation before production programming.
Recommended
Appliance Control Boards
Household and light-commercial appliances such as washing machines, dishwashers, refrigerators, and microwave ovens commonly use PIC16C6x microcontrollers for front-panel and motor-control logic. The PIC16C64A-10E/PT fits this role with its 33 I/O lines for keypad scanning, seven-segment or LCD segment driving via PORTD, and triac/relay actuation via PORTB. The 2.5V to 6V operating range matches 5V regulated SMPS rails common in appliances. The watchdog timer with dedicated RC oscillator provides fail-safe recovery from firmware lockups, which is critical in unattended appliances. OTP cost optimization is a major reason appliance OEMs chose this family for high-volume production.
Recommended
Automotive Body Electronics (Non-Safety)
Within non-safety body electronics - power window controllers, seat position memories, mirror adjusters, HVAC blend-door actuators, and interior lighting modules - the PIC16C64A-10E/PT and similar PIC16C6x parts handled decades of vehicle production. The 2.5V to 6V range tolerates cranking transients when paired with simple external filtering. USART and SSP peripherals enable LIN-bus or K-line communication with body control modules. For new automotive programs, designers should migrate to AEC-Q100 qualified PIC16F or dsPIC equivalents; the legacy PIC16C64A family is NRND and not automotive-qualified per Microchip's product page.
Recommended
HVAC Fan and Blower Controllers
HVAC fan and blower controllers use the PIC16C64A-10E/PT's three timers to generate PWM or variable-frequency drives for brushless DC fans, multi-speed AC blower motors, and proportional damper actuators. The 16-bit Timer1 provides precise tachometer feedback capture for closed-loop RPM regulation, while the 8-bit Timer0 handles base PWM generation. The 10 MHz CPU clock allows 50/60 Hz zero-cross detection plus RPM calculation within a single 16.6/20 ms line cycle. The extended -40C to +125C grade handles the high-ambient temperatures found inside furnace and air-handler cabinets near heating elements.
Recommended
Embedded Instrumentation and Data Loggers
Standalone data loggers for temperature monitoring, energy metering, and remote sensor reading historically used the PIC16C64A-10E/PT's USART to drive external ADC converters or UART-connected sensors. With 128 bytes of RAM and 3.5 KB of OTP, the device can buffer modest sample sets before transmitting them over serial links or storing to external EEPROM. The hardware USART enables reliable asynchronous communication up to 115200 baud for telemetry uplinks. Designers should add external ADC (such as MCP3002) because the PIC16C64A has no on-chip ADC; this is a key migration consideration versus the PIC16F877A successor.
Recommended
Point-of-Sale Terminals and Access Control
Legacy point-of-sale terminals, magnetic-stripe readers, and keypad-based access controllers employed the PIC16C64A-10E/PT as a low-cost I/O expander and protocol translator, offloading the main CPU by scanning keypads, driving displays, and serializing card-reader data streams. The 33 I/O pins accommodate 4x4 keypads plus seven-segment or character-LCD interfaces directly. The hardware USART bridges to external modems, printers, or host terminals. OTP-based code storage is acceptable in this application since firmware rarely changes after deployment, and the lower unit cost versus Flash parts favors high-volume consumer terminals.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C64A-10E/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C64A-10/PT | PIC16C64A-04I/PT | PIC16C65B-10E/PT | PIC16F877A-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin TQFP (PT), 10x10 mm | 44-pin TQFP (PT), 10x10 mm - same | 44-pin TQFP (PT), 10x10 mm - same | 44-pin TQFP (PT), 10x10 mm - same | 44-pin TQFP (PT), 10x10 mm - same |
| Maximum CPU Frequency | 10 MHz | 10 MHz | 4 MHz | 10 MHz | 20 MHz |
| Program Memory Type | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 7 KB OTP | 14 KB Flash |
| RAM Size | 128 bytes | 128 bytes | 128 bytes | 192 bytes | 368 bytes |
| Number of I/O Pins | 33 | 33 | 33 | 33 | 33 |
| Operating Voltage Range | 2.5 V to 6.0 V | 2.5 V to 6.0 V | 2.5 V to 6.0 V | 2.5 V to 6.0 V | 2.0 V to 5.5 V |
| Operating Temperature Range | -40 C to +125 C (E grade) | 0 C to +70 C | -40 C to +85 C (I grade) | -40 C to +125 C | -40 C to +85 C (I grade) |
| A/D Converter | None | None | None | None | 10-bit, 8 channels |
| RoHS Compliance | Non-compliant | Non-compliant | Non-compliant | Non-compliant | Compliant |
| Lifecycle Status | NRND | NRND | NRND | NRND | Active |
Key Differentiators
- Extended industrial temperature grade on E suffix variant (vs PIC16C64A-10/PT)
- Flash reprogrammability with on-chip ADC (vs PIC16F877A-I/PT)
- Enhanced peripheral set in recommended successor (vs PIC16C65B-10E/PT)
Design Notes
OTP program memory cannot be erased or rewritten once programmed. Validate the full firmware (including all interrupt vectors, calibration tables, and lookup data) on a windowed/Flash equivalent such as PIC16F877A-I/PT or PIC16C65B development board before committing to production programming. Blowing the security fuse locks the part permanently; design the firmware update strategy accordingly. For prototype builds, order the Flash-based PIC16F877A-I/PT first to develop and debug, then port final code to the OTP PIC16C64A-10E/PT for production.
Estimated: supply current consumption for the PIC16C64A-10E/PT at 10 MHz and 5V is typically 5 to 15 mA depending on peripheral activation and I/O loading. The device has multiple VDD/VSS pin pairs (pins 11/12, 31/32, 41/42); all pairs must be connected on the PCB with low-impedance traces and decoupling capacitors (100 nF ceramic + 10 uF bulk) placed within 5 mm of each VDD pin. Insufficient decoupling causes intermittent brown-out-reset events during high-current I/O switching.
Route the crystal/oscillator traces (OSC1/OSC2, pins 13/14) with short, symmetrical traces and a ground guard ring to minimize EMI pickup. Place the crystal within 5 mm of the MCU pins and keep digital signal traces away from the oscillator area. For noise-sensitive applications, add a 10 to 33 pF load capacitor pair matched to the crystal's load capacitance specification. The MCLR/VPP pin (pin 1) requires a 10 kohm pull-up to VDD and a 100 nF capacitor to ground for proper reset behavior during power-up.
The 44-pin TQFP (PT) package has a thermal resistance theta_JA of approximately 50 C/W on a standard 4-layer JEDEC test board. Estimated: at 15 mA active current and 5V supply, internal power dissipation is approximately 75 mW, yielding a junction temperature rise of 3.75 C above ambient - well within the -40 C to +125 C operating range. The thermal limitation is rarely the constraint for this MCU; the extended temperature grade is mainly for ambient industrial environments.
Compliance Information
PIC16C64A-10E/PT is non-RoHS per Microchip product page; legacy OTP PIC16C family predates RoHS requirements. For RoHS-compliant designs, migrate to PIC16F877A-I/PT or equivalent Flash parts. AEC-Q100 qualification not available for this part.
