PIC16C64A-10E/L - 8-bit OTP MCU 3.5KB 10MHz 44-PLCC | Microchip
MPN: PIC16C64A-10E/L ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.45 | $7.45 |
| 10 | $6.8 | $68.00 |
| 100 | $6.1 | $610.00 |
| 500 | $5.45 | $2,725.00 |
| 1,000 | $4.85 | $4,850.00 |
PIC16C64A-10E/L Overview
What is an OTP microcontroller? An OTP (One-Time-Programmable) microcontroller is a class of MCU whose program memory can be written only once after manufacture using an external programmer. OTP MCUs sit hierarchically between mask-ROM devices (cheapest at high volume but require full mask commitment) and Flash MCUs (re-programmable, higher cost per bit). They are widely used in mature consumer appliances, automotive sub-systems, and industrial controllers where firmware is finalized and unit cost dominates. The PIC16C6X family specifically pioneered the RISC architecture in low-cost 8-bit microcontrollers.
Key features include a fully-static CMOS design allowing DC to 10 MHz clock input, low power consumption of 15 uA typical at 5 V / 4 MHz and only 1 uA typical at 3 V / 32 kHz, an 8-bit timer/counter with 8-bit prescaler, a Watchdog Timer with its own on-chip RC oscillator for reliable operation, and a Capture/Compare/PWM (CCP) module. The 14-bit instruction word enables compact code, and only 35 single-word instructions need to be learned.
The PIC16C64A-10E/L uses a Harvard architecture with separate program and data buses plus a 14-bit instruction set, an 8-level deep hardware stack, and direct, indirect, and relative addressing modes. The device supports in-circuit serial programming (ICSP) via two pins, eliminating the need for a socketed programmer. Brown-out reset circuitry protects against low-Vdd code corruption.
Typical applications include industrial control logic boards, appliance controllers, automotive body electronics, security alarm panels, and sensor interface modules. The wide 2.5 V to 6.0 V operating range also supports battery-backed instrumentation and 5 V industrial bus nodes.
When designing with this MCU, reserve the MCLR/Vpp pin for in-circuit programming access and place a 10 kohm pull-up on it for normal operation. Decouple VDD with 0.1 uF ceramic as close to the pins as possible, and avoid long traces on OSC1/OSC2 to reduce EMI susceptibility. Brown-out detection must remain enabled for code integrity in noisy industrial environments.
This page synthesizes current distributor pricing, drop-in compatible PLCC alternatives, and practical design notes for engineers sourcing the PIC16C64A-10E/L, complementing the official Microchip datasheet with comparison and selection content not found in any single manufacturer document.
Drop-in alternatives for PIC16C64A-10E/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 PIC16C64A-10E/L (same form factor and footprint) — differing in Package, Timers, RoHS Status, Program Memory Type, Operating Temperature Range.
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-04I/L
✅ Drop-In✓ In Stock
$4.5 / Unit
View Datasheet →PIC16C64A-04I/PQ
✅ Drop-In✓ In Stock
$6.4 / Unit
View Datasheet →PIC16C64A-04I/P
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$6.1 / Unit
View Datasheet →PIC16C64A-04E/PT
✅ Drop-In✓ In Stock
$7.35 / Unit
View Datasheet →PIC16C64A-10E/L Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC RISC |
| Program Memory Type | OTP (One-Time-Programmable) EPROM |
| Program Memory Size | 3.5 KB (2K x 14) |
| RAM Size | 128 bytes |
| Data EEPROM | 0 bytes |
| Maximum CPU Frequency | 10 MHz |
| Instruction Word Width | 14 bits |
| Number of I/O Pins | 33 |
| Operating Voltage Range | 2.5 V to 6.0 V |
| Operating Temperature Range | -40C to +125C (Extended grade) |
| Package | 44-PLCC (16.59 x 16.59 mm) |
| Supply Current (5 V, 4 MHz) | 15 uA typical |
| Supply Current (3 V, 32 kHz) | 1 uA typical |
| Number of Instructions | 35 single-word |
| Stack Depth | 8 hardware levels |
| Timers | Timer0 8-bit, Timer1 16-bit, Watchdog Timer |
| Capture/Compare/PWM | 1 x CCP module |
| A/D Converter | None |
| UART/USART | AUSART (Addressable USART) |
PIC16C64A-10E/L Pin Configuration
| Pin 1 | MCLR/VPP — Master Clear (active low) / Programming voltage input |
| Pin 2 | RA0/AN0 — Port A bit 0 / analog input 0 (digital only on PIC16C64A) |
| Pin 3 | RA1/AN1 — Port A bit 1 / analog input 1 (digital only on PIC16C64A) |
| Pin 4 | RA2/AN2 — Port A bit 2 / analog input 2 (digital only on PIC16C64A) |
| Pin 5 | RA3/AN3/VREF — Port A bit 3 / analog input 3 / VREF (digital only on PIC16C64A) |
| Pin 6 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| Pin 7 | RA5/SS/AN4 — Port A bit 5 / SPI slave select / analog input 4 (digital only on PIC16C64A) |
| Pin 8 | RE0/RD — Port E bit 0 / read control for parallel slave port |
| Pin 9 | RE1/WR — Port E bit 1 / write control for parallel slave port |
| Pin 10 | RE2/CS — Port E bit 2 / chip select for parallel slave port |
| Pin 11 | VDD — Positive power supply |
| Pin 12 | VSS — Ground |
| Pin 13 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| Pin 14 | OSC2/CLKOUT — Oscillator crystal output / clock output |
| Pin 15 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer1 oscillator output / Timer1 clock input |
| Pin 16 | RC1/T1OSI/CCP2 — Port C bit 1 / Timer1 oscillator input / CCP2 output |
| Pin 17 | RC2/CCP1 — Port C bit 2 / Capture/Compare/PWM 1 output |
| Pin 18 | RC3/SCK/SCL — Port C bit 3 / SPI clock / I2C clock |
| Pin 19 | RD0/PSP0 — Port D bit 0 / Parallel Slave Port bit 0 |
| Pin 20 | RD1/PSP1 — Port D bit 1 / Parallel Slave Port bit 1 |
| Pin 21 | RD2/PSP2 — Port D bit 2 / Parallel Slave Port bit 2 |
| Pin 22 | RD3/PSP3 — Port D bit 3 / Parallel Slave Port bit 3 |
| Pin 23 | RC4/SDI/SDA — Port C bit 4 / SPI data in / I2C data |
| Pin 24 | RC5/SDO — Port C bit 5 / SPI data out |
| Pin 25 | RC6/TX/CK — Port C bit 6 / AUSART TX / AUSART clock |
| Pin 26 | RC7/RX/DT — Port C bit 7 / AUSART RX / AUSART data |
| Pin 27 | RD4/PSP4 — Port D bit 4 / Parallel Slave Port bit 4 |
| Pin 28 | RD5/PSP5 — Port D bit 5 / Parallel Slave Port bit 5 |
| Pin 29 | RD6/PSP6 — Port D bit 6 / Parallel Slave Port bit 6 |
| Pin 30 | RD7/PSP7 — Port D bit 7 / Parallel Slave Port bit 7 |
| Pin 31 | VSS — Ground |
| Pin 32 | VDD — Positive power supply |
| Pin 33 | RB0/INT — Port B bit 0 / external interrupt input |
| Pin 34 | RB1 — Port B bit 1 |
| Pin 35 | RB2 — Port B bit 2 |
| Pin 36 | RB3 — Port B bit 3 |
| Pin 37 | RB4 — Port B bit 4 |
| Pin 38 | RB5 — Port B bit 5 |
| Pin 39 | RB6/PGC — Port B bit 6 / ICSP clock |
| Pin 40 | RB7/PGD — Port B bit 7 / ICSP data |
| Pin 41 | RE3 — Port E bit 3 |
| Pin 42 | RA6 — Port A bit 6 (no analog; not present on PIC16C64A die - reserved) |
| Pin 43 | RA7 — Port A bit 7 (no analog; not present on PIC16C64A die - reserved) |
| Pin 44 | NC — Not connected (no bond-out for this pin on 44-PLCC PIC16C64A) |
Typical Applications
PIC16C64A-10E/L is suitable for 7 applications: Industrial Control Logic Boards, Appliance Timer Controllers, Automotive Body Electronics, Security Alarm Panels, Sensor Interface Modules, Vending Machine Controllers, Battery-Backed Instrumentation.
Industrial Control Logic Boards
The PIC16C64A-10E/L fits industrial control boards because its 3.5 KB OTP program memory holds typical ladder-logic replacement firmware, 33 I/O pins drive relays, opto-isolators, and indicator LEDs, and the 2.5-6.0 V operating range accepts 24 V-derived 5 V rails common in factory PLCs. The 10 MHz CPU clock executes polling loops for digital inputs at well under 1 ms cycle time, while the brown-out reset and Watchdog Timer harden the firmware against supply glitches on noisy motor-control cabinets. Its NRND status means new industrial designs should plan Flash migration, but existing field installations benefit from the part's proven reliability.
Recommended
Appliance Timer Controllers
Washing machines, dishwashers, and microwave ovens have used the PIC16C64A-10E/L as the cycle timer because the 3.5 KB OTP memory stores multi-stage timer programs and the CCP module generates PWM outputs for motor speed and heater duty cycle. The MCU's low 15 uA active current at 5 V/4 MHz keeps standby power within Energy Star limits, while the 16-bit Timer1 captures wall-clock seconds from a 32.768 kHz crystal for real-time cycle scheduling. Extended temperature grade (-40C to +125C) lets the same board operate in unheated laundry rooms and hot appliance enclosures.
Recommended
Automotive Body Electronics
The PIC16C64A-10E/L powers automotive body controllers such as seat adjusters, mirror-fold modules, and accessory multiplexers where the Extended temperature grade handles under-hood thermal stress and the AUSART serial port links body computers across the CAN-equivalent local bus. The 33 I/O lines interface directly to 12 V automotive signals through resistor dividers and small MOSFET drivers, while the Watchdog Timer recovers the MCU from load-dump-induced code lockups. For volume automotive programs the AEC-Q100 qualified PIC16F877A-I/L is the preferred drop-in, but existing aftermarket designs continue to ship with the OTP PIC16C64A-10E/L.
Recommended
Security Alarm Panels
The PIC16C64A-10E/L fits alarm panel main boards because the 3.5 KB OTP memory stores zone monitoring and siren-pattern code, the 33 I/O pins scan up to 16 sensor zones plus status LEDs and a numeric keypad matrix, and the AUSART links to a digital dialer or GSM modem. Brown-out reset and Watchdog Timer maintain code integrity during battery-backed brownouts, and the 2.5 V minimum operating voltage lets the panel keep running from a 6 V backup battery after the main supply fails. Extended temperature operation supports outdoor equipment cabinets and unheated garages.
Recommended
Sensor Interface Modules
Industrial 4-20 mA loop-powered sensor transmitters and remote data-logger front-ends use the PIC16C64A-10E/L as the controller because its 33 I/O pins read multiple switch and analog sensors through external op-amps, and the AUSART port uploads readings to a host PLC or SCADA system. The MCU's 1 uA sleep current at 3 V/32 kHz preserves battery life in remote sensor nodes, and the Extended temperature grade lets the same firmware serve arctic pipeline monitors and boiler-room installations. Because the part has no internal ADC, external 8- or 10-bit ADC ICs like the MCP3002 attach over SPI to provide conversion.
Recommended
Vending Machine Controllers
Vending and ticketing machines rely on the PIC16C64A-10E/L to manage coin acceptors, bill validators, vend motors, and LCD user displays. The 3.5 KB OTP memory holds vend logic and audit counters, the CCP module generates PWM for motor speed control of dispense spirals, and the 33 I/O lines connect to multi-button selection keypads and 7-segment credit displays. Extended temperature operation keeps the controller functional in outdoor vending enclosures from -40 C winters to +125 C rooftop solar loading, while brown-out reset prevents coin counter corruption during AC brownouts.
Recommended
Battery-Backed Instrumentation
Portable test instruments, remote data loggers, and handheld meters benefit from the PIC16C64A-10E/L because its 1 uA typical current at 3 V / 32 kHz enables multi-year battery life on a single lithium cell, and the 2.5 V minimum operating voltage lets the MCU run from two AA cells even near end-of-life. The 33 I/O lines read button matrices and LCD segment displays, while the AUSART port streams logged readings to a host PC when the meter is docked. Extended temperature grade supports field use in cold-weather surveying and hot-climate HVAC service.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C64A-10E/L — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C64A-10/PT | PIC16C64A-04I/PT | PIC16C64A-04I/L | PIC16C64A-04E/PT |
|---|---|---|---|---|---|
| Package | 44-PLCC (16.59x16.59 mm) | 44-PLCC (same) | 44-PLCC (same) | 44-PLCC (same) | 44-PLCC (same) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Speed Grade | 10 MHz | 10 MHz (same) | 4 MHz (-60%) | 4 MHz (-60%) | 4 MHz (-60%) |
| Temperature Grade | Extended (-40C to +125C) | Industrial (0C to +70C) | Industrial (0C to +70C) | Industrial (0C to +70C) | Extended (-40C to +125C) |
| Program Memory | 3.5 KB OTP | 3.5 KB OTP (same) | 3.5 KB OTP (same) | 3.5 KB OTP (same) | 3.5 KB OTP (same) |
| RAM | 128 bytes | 128 bytes (same) | 128 bytes (same) | 128 bytes (same) | 128 bytes (same) |
| Number of I/O | 33 | 33 (same) | 33 (same) | 33 (same) | 33 (same) |
| Operating Voltage | 2.5 V to 6.0 V | 2.5 V to 6.0 V (same) | 2.5 V to 6.0 V (same) | 2.5 V to 6.0 V (same) | 2.5 V to 6.0 V (same) |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND |
Key Differentiators
- Extended temperature grade for harsh environments (vs PIC16C64A-10/PT)
- Highest speed grade in the PIC16C64A family (vs PIC16C64A-04I/L)
- Pinout-compatible migration path to Flash PIC16F877A (vs PIC16F877A-I/L)
Design Notes
Decouple both VDD pins (11 and 32) with 0.1 uF ceramic capacitors placed within 5 mm of each VDD/VSS pair, and add a single 10 uF tantalum or aluminum bulk capacitor near the MCU. The PIC16C64A draws 15 uA typical at 5 V / 4 MHz active and 1 uA typical at 3 V / 32 kHz sleep, so a poorly decoupled supply can cause oscillator instability and brown-out resets that corrupt OTP-stored firmware (no recovery possible without re-programming the entire device).
Route OSC1 and OSC2 traces short and symmetric, with the crystal or resonator located within 10 mm of the MCU. Add a ground guard ring around the oscillator traces to reduce radiated EMI pickup that can inject noise into the Watchdog Timer and cause unwanted resets. Keep high-speed digital lines (RC3/SCK, RC4/SDI, RC5/SDO) away from the analog-capable Port A pins to minimize cross-talk, even though Port A is digital-only on the PIC16C64A.
The MCLR/VPP pin (pin 1) requires a 10 kohm pull-up to VDD for normal operation; connecting it directly to VDD is acceptable but prevents in-circuit serial programming (ICSP). Because the device is OTP, any code corruption from missing brown-out reset configuration or insufficient Watchdog Timer servicing is permanent; always enable BOR and the WDT in the configuration word and route WDT wake-up events to the MCLR pin during development.
At 10 MHz active and 5 V supply the PIC16C64A-10E/L dissipates roughly 50 mW worst case (10 mA active current), so junction temperature rise above ambient is approximately 5 C in the 44-PLCC package with theta_JA of 50 C/W. This is well within the Extended -40C to +125C operating range even at 85 C ambient, but for closed industrial enclosures with no airflow, verify worst-case Tj using the manufacturer's thermal advisory section rather than relying on the typical specification.
Compliance Information
RoHS, REACH, lead-free, and halogen-free status were not present in the verified web data and are listed as unknown. PIC16C64A family predates widespread AEC-Q100 automotive qualification; non-automotive grade only. Microchip publishes conflict-minerals compliance statements on its corporate-responsibility page.
