PIC16LC76-04I/SP - 8-Bit 4MHz 14KB OTP MCU 28-SPDIP | Microchip
MPN: PIC16LC76-04I/SP ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $9.42 | $9.42 |
| 10 | $8.65 | $86.50 |
| 100 | $7.41 | $741.00 |
| 500 | $6.18 | $3,090.00 |
| 1,000 | $4.85 | $4,850.00 |
PIC16LC76-04I/SP Overview
A microcontroller (MCU) is a single-chip computer containing a processor core, program memory, working RAM, and a configurable set of peripheral interfaces. The PIC16C7X family belongs to Microchip's mid-range PIC architecture and integrates an 8-channel 8-bit Analog-to-Digital Converter (ADC), synchronous and asynchronous serial ports, and Capture/Compare/PWM (CCP) modules. This positions the part as a sub-category of: microcontroller -> embedded processor -> integrated circuit -> semiconductor. The LC prefix designates the low-power CMOS variant optimized for battery-powered applications drawing roughly 50% less quiescent current than the standard PIC16C76.
Key features include Harvard architecture with separate program and data buses, 35 single-word instructions, 200 ns instruction execution time, two 8-bit timers plus one 16-bit timer, a Watchdog Timer with on-chip RC oscillator, and selectable oscillator options (RC, LP, XT, HS). The 22 I/O pins each source/sink up to 25 mA, sufficient for direct LED drive, and the chip operates from a wide 2.5 V to 6.0 V supply, with the LC variant specifically characterized at 3.3 V and 5 V rails typical of low-power designs.
Typical applications include industrial process control (sensor interfacing via the 8-bit ADC), low-power battery-operated instruments, automotive body electronics modules, simple motor control loops, and consumer appliance user-interface controllers. The 14 KB OTP memory suits fixed-function firmware where field updates are not required, lowering per-unit cost versus flash-based equivalents.
When designing with the PIC16LC76-04I/SP, ensure that the MCLR reset pin is pulled high through a 10-50 kohm resistor and that the OSC1/OSC2 oscillator network matches the selected mode (XT for 4 MHz crystal). Decoupling VDD with a 100 nF ceramic capacitor placed within 5 mm of the supply pin is mandatory for ADC accuracy.
Drop-in alternatives for PIC16LC76-04I/SP — 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 PIC16LC76-04I/SP (same form factor and footprint) — differing in ADC, Mounting Type, Package, Program Memory Type, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F76-I/SP
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LC76-04/SO
✅ Drop-In✓ In Stock
$5.31 / Unit
View Datasheet →PIC16LC76-04I/SO
✅ Drop-In✓ In Stock
$4.45 / Unit
View Datasheet →PIC16C76-04I/SP
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC16F876A-I/SP
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC16C76-04I/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC16LC76-04I/SP Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC, Harvard |
| Family | PIC16C7X (mid-range) |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 14 KB (8K x 14 words) |
| RAM | 368 bytes |
| Maximum Clock Frequency | 4 MHz |
| Instruction Execution Time | 200 ns at 4 MHz |
| Supply Voltage (VDD) | 2.5 V to 6.0 V (3.3 V / 5 V typical) |
| I/O Pins | 22 |
| ADC | 8-channel, 8-bit |
| Timers | 2 x 8-bit + 1 x 16-bit |
| I/O Pin Current (source/sink) | 25 mA per pin |
| Operating Temperature | -40 C to +85 C (Industrial, 'I' suffix) |
| Package | 28-SPDIP (0.300 inch, 7.62 mm pitch) |
| Mounting Type | Through-Hole |
PIC16LC76-04I/SP Pin Configuration
| Pin 1 | MCLR/VPP — Master Clear (Reset) input / Programming voltage |
| Pin 2 | RA0/AN0 — PORTA bit 0 / Analog input channel 0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / Analog input channel 1 |
| Pin 4 | RA2/AN2 — PORTA bit 2 / Analog input channel 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/AN4/SS — PORTA bit 5 / Analog input 4 / SPI Slave Select |
| Pin 8 | OSC1/CLKIN — Oscillator crystal input / External clock input |
| Pin 9 | OSC2/CLKOUT — Oscillator crystal output / Clock output (Fosc/4) |
| Pin 10 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Pin 11 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 output |
| Pin 12 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM output |
| Pin 13 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pin 14 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pin 15 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pin 16 | RC6/TX/CK — PORTC bit 6 / USART TX / USART synchronous clock |
| Pin 17 | RC7/RX/DT — PORTC bit 7 / USART RX / USART synchronous data |
| Pin 18 | VSS — Ground reference |
| Pin 19 | VDD — Positive supply voltage (2.5V to 6.0V) |
| Pin 20 | RB0/INT — PORTB bit 0 / External interrupt input |
| Pin 21 | RB1 — PORTB bit 1 |
| Pin 22 | RB2 — PORTB bit 2 |
| Pin 23 | RB3/PGM — PORTB bit 3 / Low-voltage programming input |
| Pin 24 | RB4 — PORTB bit 4 (interrupt-on-change) |
| Pin 25 | RB5 — PORTB bit 5 (interrupt-on-change) |
| Pin 26 | RB6/PGC — PORTB bit 6 / ICSP clock input |
| Pin 27 | RB7/PGD — PORTB bit 7 / ICSP data input/output |
| Pin 28 | RE0/RD/AN5 — PORTE bit 0 / Read control / Analog input 5 |
Typical Applications
PIC16LC76-04I/SP is suitable for 6 applications: Industrial Process Control Sensor Interface, Battery-Operated Portable Instruments, Automotive Body Electronics Modules, Simple Motor Control and PWM Drives, Consumer Appliance User-Interface Controllers, Low-Cost Security and Access Control Panels.
Industrial Process Control Sensor Interface
The PIC16LC76-04I/SP suits industrial sensor nodes that read analog process variables and actuate digital outputs in 4-20 mA loops or relay banks. Its integrated 8-channel 8-bit ADC reads thermocouples, pressure transducers, and level sensors directly, while the 22 I/O pins each source/sink 25 mA, sufficient to drive relays, solenoids, and indicator LEDs without external buffers. The LC variant's reduced quiescent current (about half the PIC16C76) is critical for loop-powered 4-20 mA transmitters where total current budget is below 3.5 mA. Industrial -40C to +85C operation handles factory-floor temperature extremes, and the 28-SPDIP through-hole package withstands vibration better than SMD equivalents, ideal for DIN-rail mounted PLCs.
Recommended
Battery-Operated Portable Instruments
The PIC16LC76-04I/SP is purpose-built for battery-powered handheld instruments such as digital multimeters, handheld scanners, and portable data loggers, where every microamp of quiescent current matters. The LC variant draws roughly 50% less Iq than the PIC16C76, extending battery life in 3.6 V lithium-thionyl-chloride packs rated for 10+ year deployments. The 14 KB OTP program memory holds fixed calibration tables and user-interface firmware, and the 4 MHz clock combined with 200 ns instruction cycles is more than adequate for keypad scanning, LCD driving, and serial protocol handling without idle CPU waste. The industrial -40C to +85C rating supports outdoor and refrigerated logistics applications.
Recommended
Automotive Body Electronics Modules
The PIC16LC76-04I/SP is well suited for non-safety automotive body controllers such as window lift modules, seat position memories, mirror adjusters, and interior lighting controllers where 8-bit processing and OTP memory meet BOM cost targets. The MCU's 22 I/O pins directly drive small DC motors via discrete H-bridges, and the 8-bit ADC reads potentiometer-based position sensors and current shunts. The industrial -40C to +85C temperature range covers cabin environments, though under-hood applications require the AEC-Q100 qualified PIC16F76 or PIC18F family. The 28-SPDIP package simplifies prototyping and field-service replacement compared to fine-pitch QFN equivalents.
Recommended
Simple Motor Control and PWM Drives
The PIC16LC76-04I/SP handles closed-loop DC motor speed control, PWM-driven fans, and small brushless DC (BLDC) commutation in cost-sensitive appliances such as HVAC blowers, water pumps, and small appliance motors. The Capture/Compare/PWM (CCP) module generates accurate PWM signals up to 10-bit resolution for smooth speed control, while the 16-bit Timer1 captures tachometer feedback for closed-loop regulation. The 22 I/O pins each sink 25 mA, enough to drive optocouplers or small gate drivers directly. The LC variant's low Iq supports always-on standby modes where the MCU listens for wake-up commands while consuming microamp-level current.
Recommended
Consumer Appliance User-Interface Controllers
The PIC16LC76-04I/SP fits cost-sensitive white-goods user-interface controllers such as washing-machine displays, microwave keypads, and dishwasher cycle selectors where the 14 KB OTP holds the full state machine and button debounce logic. Its 22 I/O pins scan 4x4 key matrices directly and drive 7-segment LED or character LCDs without external decoder ICs. The 8-bit ADC reads rotary encoder positions, thermistor temperature sensors, and water-level probes. Industrial -40C to +85C operation handles the thermal stress of appliance interiors, and the 28-SPDIP package simplifies wave-soldered manufacturing versus reflow-only SMD equivalents, reducing assembly cost.
Recommended
Low-Cost Security and Access Control Panels
The PIC16LC76-04I/SP is appropriate for keypad-based security panels, magnetic-door controllers, and simple RFID reader interfaces where 14 KB OTP provides ample firmware space and pin-count matches the I/O requirements. The hardware USART supports Wiegand-protocol card readers at 26-bit or 34-bit formats, and the 8-bit ADC supervises backup-battery voltage to trigger low-battery alerts. The Watchdog Timer with on-chip RC oscillator prevents firmware lockups in unattended installations. The LC variant's low quiescent current extends backup-battery runtime during AC mains failure, critical for UL-listed burglar alarm panels that must operate 24+ hours on standby battery.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LC76-04I/SP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F76-I/SP | PIC16LC76-04/SO | PIC16LC76-04I/SO | PIC16C76-04I/SP | PIC16F876A-I/SP |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SPDIP (through-hole) | 28-SPDIP (through-hole) | 28-SPDIP (through-hole) | 28-SPDIP (through-hole) | 28-SPDIP (through-hole) | 28-SPDIP (through-hole) |
| Program Memory Type | 14 KB OTP | 14 KB Flash (re-programmable) | 14 KB OTP | 14 KB OTP | 14 KB OTP (non-LC) | 14 KB Flash |
| Maximum Clock Frequency | 4 MHz | 20 MHz | 4 MHz | 4 MHz | 4 MHz | 20 MHz |
| Power Variant | LC (low-power CMOS) | F (Flash, standard power) | LC (low-power) | LC (low-power) | C (standard CMOS) | F (Flash, standard power) |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | 0 C to +70 C (Commercial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) |
| ADC | 8-channel, 8-bit | 8-channel, 8-bit | 8-channel, 8-bit | 8-channel, 8-bit | 8-channel, 8-bit | 8-channel, 10-bit |
| I/O Pins | 22 | 22 | 22 | 22 | 22 | 22 |
| Lifecycle Status | NRND | Active (recommended) | NRND | NRND | NRND | Active |
Key Differentiators
- Flash re-programmability eliminates OTP one-shot risk (vs PIC16LC76-04I/SP (this OTP part))
- Lower quiescent current at 3.3 V extends battery life (vs PIC16C76-04I/SP)
- Surface-mount SOIC option for space-constrained designs (vs PIC16LC76-04I/SO)
Design Notes
The PIC16LC76-04I/SP LC variant draws roughly half the quiescent current of the standard PIC16C76 at 3.3 V operation, but absolute Iq values at 4 MHz remain in the low-mA range. For battery-powered designs, enable Sleep mode between ADC samples to drop current to microamp levels; the Watchdog Timer with on-chip RC oscillator can wake the MCU at programmable intervals. Place a 100 nF ceramic decoupling capacitor within 5 mm of VDD (pin 19) and VSS (pin 18), plus a bulk 10 uF tantalum or aluminum-polymer capacitor at the supply rail. Power-on reset is reliable above 1.5 V VDD; designs below this threshold require external MCP130T or equivalent voltage supervisor.
Route the 4 MHz XTAL traces symmetrically between OSC1 (pin 8) and OSC2 (pin 9), keeping them short (under 10 mm) and guarded by a ground pour to minimize EMI coupling into the analog ADC inputs. Place the crystal within 5 mm of the MCU, with load capacitors (typically 15-33 pF) returned to a clean analog ground. The MCLR pin (pin 1) must be pulled high through a 10-50 kohm resistor; do not leave MCLR floating, as noise pickup will trigger spurious resets. For ICSP in-circuit programming on prototype boards, route PGC (pin 26) and PGD (pin 27) to a 6-pin header with no series resistors on the signal lines.
Do not confuse the LC low-power variant with the standard PIC16C76: the LC version is characterized at both 3.3 V and 5 V while the C version is 5 V only. OTP memory is one-time writable; verify firmware with a PIC16F76 flash prototype before committing to OTP production parts, as OTP devices cannot be erased and re-programmed. The 4 MHz speed grade is the slowest of the PIC16C76 family; if application firmware exceeds 4 MHz MIPS, choose PIC16LC76-10 (10 MHz) or PIC16LC76-20 (20 MHz) variants. Do not apply voltages above 6.0 V to VDD; absolute maximum VDD is 7.0 V with permanent damage above this threshold.
Compliance Information
RoHS, REACH, lead-free, and halogen-free status not stated in verified distributor data; default Microchip policy is RoHS/REACH compliance for SPDIP parts but verify against lot-specific Certificate of Conformance. Not AEC-Q100 qualified; for automotive body electronics requiring AEC-Q100, use PIC16F76-I/SP with appropriate automotive grade variant.
