PIC16C64A-10I/PT - 8-Bit OTP MCU, 10MHz, 44-TQFP | Microchip
MPN: PIC16C64A-10I/PT ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.95 | $8.95 |
| 10 | $8.06 | $80.60 |
| 100 | $7.2 | $720.00 |
| 500 | $6.5 | $3,250.00 |
| 1,000 | $5.85 | $5,850.00 |
PIC16C64A-10I/PT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (ROM/Flash/OTP), data memory (RAM), and peripheral interfaces. The PIC16C64A belongs to Microchip's mid-range PIC16C family, which uses a RISC architecture with a fixed 14-bit instruction word. Compared with flash-based successors (PIC16F), OTP parts like the PIC16C64A ship unprogrammed and are programmed exactly once at production; this makes them suitable for high-volume, cost-sensitive, and tamper-resistant applications.
Key features of the PIC16C64A-10I/PT include a 200 ns instruction cycle at 10 MHz, hardware USART for serial communication, a Parallel Slave Port for external bus interfacing, two CCP modules, an 8-bit timer/counter (TMR0) plus TMR1/TMR2, a Watchdog Timer with its own on-chip RC oscillator, and Brown-out Reset protection. The 33 I/O lines can source/sink up to 25 mA per pin, sufficient to drive LEDs and small relays directly.
Architecturally, the PIC16C64A uses a Harvard structure with separate program and data buses, a 14-bit-wide instruction word, and a two-stage pipeline. OTP storage provides inherent code security (cannot be read back after programming), and the 128-byte RAM is shared between general-purpose variables and the hardware stack (8 levels deep).
Typical applications include industrial control panels, appliance control boards, automotive body modules (non-safety), simple sensor interfaces, and low-cost consumer electronics. Engineers often choose the PIC16C64A-10I/PT when code security, deterministic interrupt response, and low unit cost outweigh the convenience of in-system reprogrammability.
When designing with this device, note that OTP memory must be programmed before solder-mount, so firmware changes require a socketed prototype or a windowed ceramic JW variant for development. Always derate the 25 mA I/O source/sink rating when multiple pins switch simultaneously, and place a 0.1 uF decoupling capacitor within 5 mm of VDD.
This page synthesizes distributor pricing, OTP-vs-flash drop-in alternatives in the same 44-TQFP footprint, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for PIC16C64A-10I/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-10I/PT (same form factor and footprint) — differing in Package, RoHS Status, Timers, Program Memory Type, Operating Temperature Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16C64A-10/PT
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$2.97 / Unit
View Datasheet →PIC16C64A-04I/PT
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$4.61 / Unit
View Datasheet →PIC16C64A-04E/PT
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$7.35 / Unit
View Datasheet →PIC16F74-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C65B-10I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C64A-10I/PT Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit Microcontroller (MCU) |
| Family | PIC16C (mid-range) |
| Core Architecture | PIC RISC, Harvard, 14-bit instruction word |
| Program Memory Size | 3.5 KB (2K x 14) OTP |
| RAM Size | 128 x 8 bytes |
| Data EEPROM | Not present (OTP only) |
| Maximum Clock Frequency | 10 MHz |
| Instruction Cycle Time | 200 ns at 10 MHz |
| Number of I/O Pins | 33 |
| Supply Voltage (VDD) | 2.5 V to 6.0 V |
| Operating Temperature Range | -40 C to +85 C (Industrial, "I") |
| Package / Case | 44-TQFP (10 x 10 mm), surface mount |
| Mounting Type | Surface Mount |
| On-chip Peripherals | USART, Parallel Slave Port, 2x CCP, TMR0/1/2, WDT, BOR |
| I/O Pin Source/Sink Current | 25 mA per pin |
| RoHS Status | Compliant (Pb-free TQFP) |
PIC16C64A-10I/PT 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 / VREF |
| Pin 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pin 7 | RA5/SS/AN4 — PORTA bit 5 / Slave Select / Analog input 4 |
| Pin 8 | OSC1/CLKIN — Crystal oscillator input / external clock in |
| Pin 9 | OSC2/CLKOUT — Crystal oscillator output / clock out |
| Pin 10 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / clock in |
| Pin 11 | VDD — Positive supply (+2.5V to +6.0V) |
| Pin 12 | VSS — Ground reference |
| Pin 13 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator in / CCP2 |
| Pin 14 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM 1 |
| Pin 15 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pin 16 | RD0/PSP0 — PORTD bit 0 / Parallel Slave Port bit 0 |
| Pin 17 | RD1/PSP1 — PORTD bit 1 / Parallel Slave Port bit 1 |
| Pin 18 | RD2/PSP2 — PORTD bit 2 / Parallel Slave Port bit 2 |
| Pin 19 | RD3/PSP3 — PORTD bit 3 / Parallel Slave Port bit 3 |
| Pin 20 | RD4/PSP4 — PORTD bit 4 / Parallel Slave Port bit 4 |
| Pin 21 | RD5/PSP5 — PORTD bit 5 / Parallel Slave Port bit 5 |
| Pin 22 | RD6/PSP6 — PORTD bit 6 / Parallel Slave Port bit 6 |
| Pin 23 | RD7/PSP7 — PORTD bit 7 / Parallel Slave Port bit 7 |
| Pin 24 | VSS — Ground reference (second) |
| Pin 25 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pin 26 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pin 27 | RC6/TX/CK — PORTC bit 6 / USART TX / clock |
| Pin 28 | RC7/RX/DT — PORTC bit 7 / USART RX / data |
| Pin 29 | RE0/RD/AN5 — PORTE bit 0 / Parallel Slave read / Analog input 5 |
| Pin 30 | RE1/WR/AN6 — PORTE bit 1 / Parallel Slave write / Analog input 6 |
| Pin 31 | RE2/CS/AN7 — PORTE bit 2 / Parallel Slave chip select / Analog input 7 |
| Pin 32 | VDD — Positive supply (+2.5V to +6.0V) (second) |
| Pin 33 | VSS — Ground reference (third) |
| Pin 34 | RB0/INT — PORTB bit 0 / External interrupt |
| Pin 35 | RB1 — PORTB bit 1 |
| Pin 36 | RB2 — PORTB bit 2 |
| Pin 37 | RB3 — PORTB bit 3 |
| Pin 38 | RB4 — PORTB bit 4 |
| Pin 39 | RB5 — PORTB bit 5 |
| Pin 40 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 41 | RB7/PGD — PORTB bit 7 / ICSP data |
| Pin 42 | VSS — Ground reference (fourth) |
| Pin 43 | VDD — Positive supply (+2.5V to +6.0V) (third) |
| Pin 44 | NC — Not connected (per datasheet) |
Typical Applications
PIC16C64A-10I/PT is suitable for 6 applications: Industrial Control Panels, Home Appliance Control Boards, Automotive Body Electronics (Non-Safety), Simple Sensor Interface Hubs, Low-Cost Consumer Electronics, Legacy Industrial Modem and Communication Modules.
Industrial Control Panels
The PIC16C64A-10I/PT's industrial -40C to +85C temperature range, 33 I/O lines, and integrated USART make it a strong fit for industrial control panels driving relays, keypads, and seven-segment displays. The 10 MHz instruction cycle executes a scan loop in well under 1 ms, supporting deterministic button-debounce and indicator refresh. Its 25 mA per-pin source/sink can drive optocouplers and small 5 V relays directly without external drivers. OTP memory locks the control firmware, preventing field tampering with safety logic. Compared with flash MCUs, the OTP-based PIC16C64A is preferred for high-volume panel builders where firmware is fixed after release.
Recommended
Home Appliance Control Boards
White-goods appliance boards (washing machines, dishwashers, microwave ovens) use PIC16C64A-10I/PT because its 33 I/O directly drive seven-segment LEDs, triac interfaces for motor control, and buzzer/relay outputs without external glue logic. The 200 ns instruction cycle handles real-time sensor sampling (temperature, water level, door switch) while the USART connects to an inverter display board. OTP storage locks the safety-critical wash-cycle algorithm. The 44-TQFP (10x10 mm) package fits the compact main boards typical of front-load washers.
Recommended
Automotive Body Electronics (Non-Safety)
In non-safety body modules (window lifts, seat controllers, HVAC panel logic), the PIC16C64A-10I/PT provides reliable 33-channel I/O and a hardware USART for LIN-bus slave communication at 10 MHz. Its 2.5 V to 6.0 V supply tolerates automotive cranking transients when paired with a simple TVS clamp, and the 25 mA per-pin drive directly switches small solenoid coils. The OTP memory prevents unauthorized reflashing of seat-position memory. Note: for safety-critical body modules (airbag, ABS), migrate to AEC-Q100-qualified PIC16F-series parts.
Recommended
Simple Sensor Interface Hubs
Sensor-interface boards for HVAC, agricultural monitoring, and small instrumentation use the PIC16C64A-10I/PT to read analog sensors via external ADC, drive RS-232/RS-485 transceivers through the USART, and run calibration constants stored in firmware. The 10 MHz speed completes a multi-channel scan in under 500 us, supporting 1 kHz update rates. With 33 I/O, the MCU can monitor 8 to 12 sensor inputs plus 4 control outputs on a single chip, lowering BOM cost. The 44-TQFP package is friendly to mixed-signal 4-layer boards.
Recommended
Low-Cost Consumer Electronics
High-volume consumer products (toys, educational devices, simple remote controls, small kitchen appliances) use PIC16C64A-10I/PT because the OTP program memory eliminates field-reprogramming risk and minimizes per-unit cost. The 33 I/O drive IR LEDs, keypads, buzzers, and seven-segment displays directly. A 10 MHz instruction cycle handles NEC-style IR decode and protocol parsing in real time. The 44-TQFP (10x10 mm) reflows cleanly on standard SMT lines.
Recommended
Legacy Industrial Modem and Communication Modules
Older industrial modems and RS-232/RS-485 communication modules use the PIC16C64A-10I/PT for its integrated USART, 10 MHz processing headroom, and 33 I/O for status LEDs, DIP-switch configuration, and handshake lines. The PIC16C64A's Parallel Slave Port allows the host processor to offload protocol framing to the PIC. With OTP firmware, the protocol stack cannot be reverse-engineered by reading flash contents - a meaningful security property for proprietary industrial networks. Migration to PIC16F74-I/PT is recommended for new modem designs.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C64A-10I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C64A-10/PT | PIC16C64A-04I/PT | PIC16C64A-04E/PT | PIC16F74-I/PT | PIC16C65B-10I/PT |
|---|---|---|---|---|---|---|
| Package | 44-TQFP (10x10) | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 4 KB Flash | 7 KB OTP |
| RAM | 128 B | 128 B | 128 B | 128 B | 192 B | 192 B |
| Max Clock | 10 MHz | 10 MHz | 4 MHz | 4 MHz | 10 MHz | 10 MHz |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 |
| Temp Range | -40C to +85C | 0C to +70C | -40C to +85C | -40C to +125C | -40C to +85C | -40C to +85C |
| Memory Type | OTP | OTP | OTP | OTP | Flash | OTP |
| Lifecycle | NRND | NRND | NRND | NRND | Active | Active (recommended) |
Key Differentiators
- Largest program memory in PIC16C64A OTP family (vs PIC16C64A-04I/PT)
- Industrial -40C to +85C operating range (vs PIC16C64A-10/PT)
- Flash-based drop-in successor exists (vs PIC16F74-I/PT)
Design Notes
The PIC16C64A-10I/PT has four VDD pins (11, 32, 43 and pin 1 MCLR pulled high) and four VSS pins (12, 24, 31, 33, 42) on the 44-TQFP. Place a 0.1 uF decoupling capacitor within 5 mm of each VDD/VSS pair, plus a single bulk 10 uF tantalum or ceramic at the board's power entry. Tie MCLR through a 10 kohm pull-up to VDD and add a 100 nF cap to ground for clean reset. Do not exceed the absolute maximum 7.0 V on VDD - add a TVS clamp for automotive load-dump environments.
Route the 10 MHz crystal traces (OSC1 pin 8 / OSC2 pin 9) within 5 mm of the MCU, keep them short and symmetric, and guard them with a ground pour on both sides. Avoid routing high-current relay traces parallel to the crystal traces to prevent injected noise. If using an external canned oscillator instead of a crystal, drive OSC1 only and leave OSC2 floating. Place the ICSP programming header (PGD on pin 41, PGC on pin 40, MCLR/VPP on pin 1) on a 0.1 inch single-row connector at the board edge for production programming.
Three pitfalls engineers commonly hit with the PIC16C64A-10I/PT: (1) Confusing speed grades - a 04I/PT only runs up to 4 MHz, so a 10 MHz crystal will not oscillate reliably; (2) Assuming parallel port behavior - the Parallel Slave Port on PORTD/PORTE requires correct TRIS register setup or reads will return 0; (3) I/O source/sink derating - although each pin is rated 25 mA, the total VDD source current (sum of all pins) is limited to 200 mA per datasheet DS30235D. Always check absolute maximum tables before designing high-current LED matrices.
The PIC16C64A-10I/PT in the 44-TQFP package has a junction-to-ambient thermal resistance (theta_JA) of approximately 50 C/W on a standard 4-layer JEDEC test board. At maximum quiescent current of 5 mA at 5 V, the self-heating is only 25 mW (negligible). However, when sourcing 25 mA on all 33 I/O simultaneously, total I/O power can reach 4 W, raising the junction temperature significantly above ambient. For LED-matrix applications, distribute the load across PORTs and provide a copper ground pour on the top layer under the TQFP thermal pad area.
Compliance Information
RoHS-compliant Pb-free 44-TQFP package per Microchip product page. Not AEC-Q100 qualified - not intended for safety-critical automotive. Lifecycle status: NRND (Not Recommended for New Designs) per Microchip PIC16C64A product page.
