PIC16LC64A-04I/P - 8-Bit 4MHz 3.5KB OTP MCU 40-PDIP | Microchip
MPN: PIC16LC64A-04I/P ✗ סוף ייצורPIC16LC64A-04I/P סקירה
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (program + RAM), and peripheral interfaces onto one die. MCUs sit at the lowest tier of embedded compute - below microprocessors (which need external memory) and embedded SoCs - and dominate applications where deterministic real-time control, low power, and low cost matter more than raw throughput. The PIC16C family uses a Harvard RISC architecture with a fixed 14-bit instruction word, only 35 single-word instructions, and single-cycle execution (program branches take two cycles), giving a 4 MHz oscillator up to 1 MIPS of predictable throughput.
Key features of the PIC16LC64A-04I/P include 128 bytes of RAM, an integrated analog comparator, a Watchdog Timer with on-chip RC oscillator, power-saving Sleep mode, in-circuit serial programming capability via two pins, and a programmable code-protection mechanism. The OTP program memory allows one-time field programming, making the part suited for production volumes where firmware is stable and flash reprogrammability is not required.
Architecturally, the device uses an enhanced PIC16C6X core with separate program and data buses, a 13-bit program counter capable of addressing 8K x 14 of program space, and a file-register architecture of 128 x 8 general-purpose RAM plus special-function registers. The 22 I/O pins are arranged in ports A (6), B (8), C (8) for digital I/O, with several pins multiplexed to peripherals such as the USART (SCI/SPI), timers, and the analog comparator.
Typical applications include low-cost industrial control subsystems, appliance controllers, automotive body electronics (non-safety), sensor signal conditioning front-ends, and legacy embedded products still in service. Its wide 3.0V to 5.5V operating range, low-power consumption (15 uA typical at 5V/4 MHz, 1 uA typical at 3V/32 kHz), and OTP memory make it well-suited for sealed, high-volume, cost-sensitive designs.
A primary design consideration when using OTP is that firmware bugs cannot be patched in the field. Engineers should prototype on a windowed CERDIP variant (PIC16C64A-04I/P) or a Flash sibling (PIC16F64A family) before committing to OTP for production.
This page synthesizes distributor pricing, OTP vs Flash sibling variants, and design considerations for the PIC16LC64A-04I/P beyond the manufacturer datasheet.
חלופות תחליף ישיר עבור PIC16LC64A-04I/P — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם PIC16LC64A-04I/P (אותו גורם צורה וטביעת רגל) — שונים ב Package, Mounting Type, Program Memory Size, Program Memory Type, Core Architecture.
PIC16F74A-I/P
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
PIC16F77A-I/P
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
PIC16C64A-04I/P
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC16LC64A-04/P
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC16F737-I/P
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
PIC16LC64A-04I/P דירוגים מרביים ומאפיינים חשמליים
| Core Architecture | PIC16C 8-bit RISC (Harvard) |
| 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 (not present on this OTP variant) |
| תדר שעון מקסימלי | 4 MHz |
| Instruction Set Size | 35 single-word instructions |
| Instruction Word Width | 14 bits |
| Execution Time per Instruction | 1 cycle (program branches: 2 cycles) |
| Supply Voltage Range | 3.0 V to 5.5 V |
| I/O Pins | 22 |
| Timers | Timer0, Timer1, Timer2 |
| Communication Peripherals | USART (SCI/SPI), SSP |
| Analog Peripherals | 1 analog comparator |
| טווח טמפרטורת פעולה | -40 C to +85 C (Industrial) |
| Package Type | 40-pin PDIP (Plastic DIP, 0.600 inch / 15.24 mm width) |
| סוג הרכבה | Through-Hole (THT) |
| מספר פינים | 40 |
| Power-Saving Modes | Sleep mode with Wake-up on pin change / WDT |
| Watchdog Timer | Yes, with on-chip RC oscillator |
| In-Circuit Programming | ICSP via RB6/RB7 |
| Code Protection | Programmable code-protection bit |
| Typical Current @ 5V, 4 MHz | 15 uA (per datasheet) |
| Typical Current @ 3V, 32 kHz | 1 uA (per datasheet) |
תצורת פינים של PIC16LC64A-04I/P
| פין 1 | /MCLR — Master Clear (reset) input, programming voltage input |
| פין 2 | RA0 — PORTA bit 0 / analog comparator input |
| פין 3 | RA1 — PORTA bit 1 / analog comparator input |
| פין 4 | RA2 — PORTA bit 2 / analog comparator output |
| פין 5 | RA3 — PORTA bit 3 / analog comparator input |
| פין 6 | RA4 — PORTA bit 4 / Timer0 clock input (open-drain) |
| פין 7 | RA5 — PORTA bit 5 / SS pin for SSP module |
| פין 8 | OSC1 — Crystal oscillator input / external clock input |
| פין 9 | OSC2 — Crystal oscillator output |
| פין 10 | RC0 — PORTC bit 0 / Timer1 oscillator input |
| פין 11 | VDD — Positive supply voltage |
| פין 12 | VSS — Ground reference |
| פין 13 | RC1 — PORTC bit 1 / Timer1 oscillator output |
| פין 14 | RC2 — PORTC bit 2 / CCP1 output |
| פין 15 | RC3 — PORTC bit 3 / SCL (I2C clock) for SSP |
| פין 16 | RC4 — PORTC bit 4 / SDA (I2C data) for SSP |
| פין 17 | RC5 — PORTC bit 5 / SDO (SPI data out) |
| פין 18 | RC6 — PORTC bit 6 / TX (USART asynchronous transmit) / CK (USART clock) |
| פין 19 | RC7 — PORTC bit 7 / RX (USART asynchronous receive) / DT (USART data) |
| פין 20 | VSS — Ground reference |
| פין 21 | RD0 — PORTD bit 0 / PSP data bit 0 |
| פין 22 | RD1 — PORTD bit 1 / PSP data bit 1 |
| פין 23 | RD2 — PORTD bit 2 / PSP data bit 2 |
| פין 24 | RD3 — PORTD bit 3 / PSP data bit 3 |
| פין 25 | RD4 — PORTD bit 4 / PSP data bit 4 |
| פין 26 | RD5 — PORTD bit 5 / PSP data bit 5 |
| פין 27 | RD6 — PORTD bit 6 / PSP data bit 6 |
| פין 28 | RD7 — PORTD bit 7 / PSP data bit 7 |
| פין 29 | RE0 — PORTE bit 0 / /RD control for PSP |
| פין 30 | RE1 — PORTE bit 1 / /WR control for PSP |
| פין 31 | RE2 — PORTE bit 2 / /CS control for PSP |
| פין 32 | VDD — Positive supply voltage |
| פין 33 | VSS — Ground reference |
| פין 34 | RB0 — PORTB bit 0 / external interrupt |
| פין 35 | RB1 — PORTB bit 1 |
| פין 36 | RB2 — PORTB bit 2 |
| פין 37 | RB3 — PORTB bit 3 |
| פין 38 | RB4 — PORTB bit 4 / interrupt-on-change |
| פין 39 | RB5 — PORTB bit 5 / interrupt-on-change |
| פין 40 | RB6 — PORTB bit 6 / ICSP clock / interrupt-on-change |
יישומים טיפוסיים
PIC16LC64A-04I/P מתאים עבור 6 יישוםs: Industrial Control Subsystems, Appliance Controllers, Automotive Body Electronics (Non-Safety), Sensor Signal Conditioning Front-Ends, Legacy Embedded Products Still in Service, Educational and Hobby Projects.
Industrial Control Subsystems
The PIC16LC64A-04I/P fits industrial control subsystems because its 22 digital I/O pins, three timers, and USART peripheral cover the typical sensor/actuator interface needs of a small PLC front-end or relay-replacement board. Its 3.0V to 5.5V supply range accepts both 3.3V and 5V transducers without level shifters, while the 128-byte RAM and 3.5 KB OTP program memory suit fixed-function logic such as PID loops, motor sequencing, or thermostat-style controllers. The -40C to +85C industrial temperature range is qualified for factory-floor enclosures, and the OTP memory prevents field tampering with calibrated constants. Estimated firmware headroom: roughly 2,000 14-bit instructions is sufficient for one or two feedback loops plus a serial command parser.
מומלץ
Appliance Controllers
The PIC16LC64A-04I/P is well matched to appliance controllers such as washing-machine timers, microwave ovens, and dishwasher sequencers. Its 22 I/O pins drive seven-segment displays, keypads, and triac/SCR gate drivers, while the three on-chip timers generate PWM for heater elements or motor speed control. The 4 MHz RISC core delivers deterministic 1 MIPS throughput for cycle-by-cycle control, and the 15 uA active current at 5V keeps standby consumption modest. Because the OTP memory locks firmware at production time, end users cannot reflash the controller, which is desirable for safety-certified appliances. The wide 3.0V to 5.5V supply allows direct connection to rectified 5V rails.
מומלץ
Automotive Body Electronics (Non-Safety)
The PIC16LC64A-04I/P serves automotive body-electronics applications such as interior lighting controllers, seat-position memory modules, and HVAC blend-door actuators. Its -40C to +85C industrial temperature range covers cabin-environment conditions, and the 22 I/O pins handle the multiple brushed-motor drivers and switch-scan inputs typical of body modules. The OTP memory prevents accidental field reprogramming that could affect vehicle warranty. Note that this part is not AEC-Q100 qualified; automotive safety-critical or under-hood applications should use AEC-Q100-qualified PIC16F equivalents such as the PIC16F74-I/P automotive version. The 3.0V to 5.5V supply tolerates load-dump transients when paired with proper clamping.
מומלץ
Sensor Signal Conditioning Front-Ends
The PIC16LC64A-04I/P is suitable as the digital front-end for low-cost sensor signal conditioning modules such as thermistor bridges, photocell arrays, or simple 4-20 mA loop monitors. Its on-chip analog comparator performs threshold detection without an external op-amp, and the timers measure frequency or pulse width from sensor outputs. With 22 I/O pins, the same MCU scans a keypad, drives an indicator LED, and transmits calibration constants over the USART. The low 1 uA Sleep current at 3V/32 kHz enables battery-backed sensor nodes that wake periodically to take a measurement and return to sleep. The 128-byte RAM holds a small ring buffer for averaging.
מומלץ
Legacy Embedded Products Still in Service
The PIC16LC64A-04I/P remains in service as the controller for legacy embedded products manufactured in the 1990s and 2000s, including industrial instrumentation, vending-machine controllers, security-system keypads, and HVAC zone controllers. Because these products have long field lifetimes (15-25 years), service and repair depots still need OTP replacements to fix returned units where firmware has not changed. The OTP memory ensures absolute firmware identity between factory and field repair. For these service-only applications, sourcing from authorized franchised distributors with documented traceability is essential to avoid counterfeit parts. The 40-pin PDIP package also remains friendly to through-hole rework benches.
מומלץ
Educational and Hobby Projects
The PIC16LC64A-04I/P is used in educational and hobby projects because its 40-pin PDIP package fits standard 0.600-inch breadboards and its documented instruction set (35 instructions) makes it a common teaching example in PIC microcontroller courses. The 22 I/O pins are sufficient to drive multiple LEDs, a 7-segment display, and a serial LCD. The ICSP capability on RB6/RB7 allows students to program the part without removing it from the breadboard, and the 4 MHz maximum clock avoids RF interference that complicates laboratory measurements. While the OTP memory is impractical for student iteration, the same 40-pin PDIP socket can later accept a flash-based PIC16F74A-I/P without rewiring.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור PIC16LC64A-04I/P — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | PIC16F74A-I/P | PIC16F77A-I/P | PIC16C64A-04I/P | PIC16LC64A-04/P | PIC16F737-I/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 40-PDIP | 40-PDIP - same | 40-PDIP - same | 40-PDIP - same | 40-PDIP - same | 40-PDIP - same |
| Program Memory | 3.5 KB OTP | 4 KB Flash | 8 KB Flash | 3.5 KB OTP | 3.5 KB OTP | 7 KB Flash |
| RAM | 128 bytes | 192 bytes | 192 bytes | 128 bytes | 128 bytes | 368 bytes |
| Max Clock | 4 MHz | 20 MHz | 20 MHz | 4 MHz | 4 MHz | 20 MHz |
| Supply Voltage | 3.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 4.5 V to 6.0 V | 3.0 V to 5.5 V | 2.0 V to 5.5 V |
| I/O Pins | 22 | 22 | 22 | 22 | 22 | 25 |
| Memory Type | OTP (one-time) | Flash (reprogrammable) | Flash (reprogrammable) | OTP (one-time) | OTP (one-time) | Flash (reprogrammable) |
| Lifecycle Status | Obsolete | Active | Active | Obsolete | Obsolete | Active |
מבדילים עיקריים
- Flash reprogrammability (לעומתPIC16F74A-I/P)
- Wide low-voltage supply range (לעומתPIC16C64A-04I/P)
- Industrial temperature grade (לעומתPIC16LC64A-04/P)
הערות תכנון
Do not attempt to field-update firmware on the PIC16LC64A-04I/P - its OTP EPROM can be written only once per memory cell. For development, prototype with the windowed CERDIP variant (PIC16C64A-04I/P, UV-erasable) or migrate to the flash-based PIC16F74A-I/P which is pin-compatible and ICSP-reprogrammable. Estimated OTP endurance: 1 write cycle per cell; firmware re-spin requires a new batch of parts.
The PIC16LC64A-04I/P Sleep current is approximately 1 uA typical at 3V / 32 kHz per the datasheet, which is acceptable for battery-backed sensor nodes. However, ensure that the brown-out reset (BOR) configuration is enabled in the CONFIG word to avoid undefined behavior during supply ramp-up at cold start. Add a 100 nF decoupling cap on each VDD/VSS pin pair (pins 11/12 and 31/33) placed within 5 mm of the package leads.
For the 40-pin PDIP package, route the crystal traces (OSC1 / OSC2, pins 8 and 9) as short and symmetrical as possible, with the load capacitors (typically 15-33 pF) returned to a quiet ground island. Keep high-current switching traces (PORTB/PORTC sink/source >20 mA) away from the oscillator loop. The /MCLR pin (pin 1) needs a 10 kohm pull-up to VDD plus a 100 nF to VSS for noise immunity in industrial environments.
The PIC16LC64A-04I/P in 40-pin PDIP has a typical theta_JA of approximately 50 C/W in still air, so thermal management is rarely a concern at its 15 uA active current. However, in hot industrial enclosures (ambient 70 C) with continuous 5V operation, derate the clock to 32 kHz or use Sleep mode to keep junction temperature below the 125 C maximum. Estimated power dissipation at 5V / 4 MHz / full I/O load: less than 100 mW.
מידע על תאימות
Obsolete Microchip part. RoHS-compliant per Microchip product page; REACH compliance confirmed via DigiKey. Not AEC-Q100 qualified - this is a non-automotive grade MCU. For new automotive designs, use AEC-Q100 qualified PIC16F74-I/P or PIC16F77-I/P equivalents.
