PIC18F66K40T-E/PTVAO - 64KB Flash, 64MHz 8-bit MCU | Microchip
MPN: PIC18F66K40T-E/PTVAO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.85 | $6.85 |
| 10 | $6.2 | $62.00 |
| 100 | $5.55 | $555.00 |
| 500 | $5.05 | $2,525.00 |
| 1,000 | $4.6 | $4,600.00 |
PIC18F66K40T-E/PTVAO Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (Flash), data memory (RAM), and peripherals (ADC, timers, communication) into one device. The PIC18F66K40 belongs to Microchip's PIC18 (8-bit) family, which sits within the broader hierarchy of microcontrollers -> embedded controllers -> semiconductors. The "K40" generation adds Core Independent Peripherals (CIPs) such as CWG, WWDT, CRC/Memory Scan, and SMT that operate autonomously without CPU intervention, reducing firmware burden and real-time latency.
Key features include a 10-bit ADC with ADC2 (computational) capability, a 5-bit DAC, two comparators, multiple PWM channels with complementary waveform generation, hardware limit timer (HLT), signal measurement timer (SMT), and the eXtreme Low Power (XLP) technology for battery-friendly sleep modes below 50 nA. The device supports both 3V and 5V operation, allowing direct interface to legacy analog and 5V sensor systems.
Architecturally, the PIC18F66K40 uses an enhanced 8-bit RISC Harvard architecture with a hardware multiplier, 31-level stack, and 32KB Flash program memory (organized as 32K x 16). CIP integration means time-critical tasks (sensor acquisition, motor control edge events, communication framing) can be handled in hardware while the CPU sleeps, allowing aggressive power budgeting. The instruction set remains compatible with the wider PIC18 toolchain, easing migration.
Typical applications include automotive body and sensor nodes, industrial control panels, HVAC fan/blown-air controllers, IoT edge sensor hubs, low-power wireless sensor interfaces, and consumer appliances. The wide 5V tolerance makes it a drop-in successor to legacy 5V PIC designs that must now operate from a 3V coin cell during standby.
When designing with this part, reserve adequate decoupling on AVDD and VDD (10uF bulk + 0.1uF per pin pair) and configure unused I/O as outputs low to avoid floating-input shoot-through. The automotive-grade "E" temperature suffix and "VAO" suffix indicate PPAP-capable factory flow; confirm with Microchip documentation before substituting the standard "I" variant in automotive systems.
Drop-in alternatives for PIC18F66K40T-E/PTVAO — 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 PIC18F66K40T-E/PTVAO (same form factor and footprint) — differing in Package, I/O Pins, ADC, Comparators, Core.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F66K40T-I/PT
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View Datasheet →PIC18F66K40-E/PTVAO
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View Datasheet →PIC18F67K40-I/PT
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View Datasheet →PIC18F66K40T-E/PTVAO Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18 (8-bit RISC, Harvard) |
| Program Memory (Flash) | 64 KB (32K x 16 words) |
| Data Memory (RAM) | 4 KB (3562 bytes) |
| EEPROM | 1 KB |
| Maximum CPU Clock | 64 MHz |
| Operating Voltage | 2.3 V to 5.5 V |
| I/O Pins | 60 |
| ADC | 10-bit ADC2 (computational) |
| DAC | 5-bit DAC |
| Comparators | 2 |
| PWM Channels | Multiple (with CWG/Complementary) |
| Package | 64-pin TQFP (10x10 mm) |
| Operating Temperature | -40C to +125C (automotive E grade) |
| Mounting Type | Surface Mount |
| MSL Level | 3 |
| RoHS Status | Compliant |
PIC18F66K40T-E/PTVAO Pin Configuration
| Pin 1 | RE0 — I/O port E bit 0 / AN5 |
| Pin 2 | RE1 — I/O port E bit 1 / AN6 |
| Pin 3 | RE2 — I/O port E bit 2 / AN7 |
| Pin 4 | RE3 — I/O port E bit 3 / no AN; MCLR/VPP on some K40 |
| Pin 5 | VDD — Digital supply |
| Pin 6 | RA0 — I/O port A bit 0 / AN0 |
| Pin 7 | RA1 — I/O port A bit 1 / AN1 |
| Pin 8 | RA2 — I/O port A bit 2 / AN2 |
| Pin 9 | RA3 — I/O port A bit 3 / AN3 / VREF+ |
| Pin 10 | RA4 — I/O port A bit 4 / AN4 |
| Pin 11 | RA5 — I/O port A bit 5 / AN5 |
| Pin 12 | RA6 — I/O port A bit 6 / OSC2 |
| Pin 13 | RA7 — I/O port A bit 7 / OSC1 |
| Pin 14 | VSS — Digital ground |
| Pin 15 | RB0 — I/O port B bit 0 / INT0 |
| Pin 16 | RB1 — I/O port B bit 1 / INT1 |
| Pin 17 | RB2 — I/O port B bit 2 / INT2 |
| Pin 18 | RB3 — I/O port B bit 3 / INT3 |
| Pin 19 | RB4 — I/O port B bit 4 |
| Pin 20 | RB5 — I/O port B bit 5 |
| Pin 21 | RB6 — I/O port B bit 6 / ICSCLK |
| Pin 22 | RB7 — I/O port B bit 7 / ICSDAT |
| Pin 23 | RC0 — I/O port C bit 0 |
| Pin 24 | RC1 — I/O port C bit 1 |
| Pin 25 | RC2 — I/O port C bit 2 / AN11 |
| Pin 26 | RC3 — I/O port C bit 3 / AN12 |
| Pin 27 | RC4 — I/O port C bit 4 / AN13 |
| Pin 28 | RC5 — I/O port C bit 5 / AN14 |
| Pin 29 | RC6 — I/O port C bit 6 / AN15 / TX |
| Pin 30 | RC7 — I/O port C bit 7 / AN16 / RX |
| Pin 31 | VSS — Digital ground |
| Pin 32 | RD0 — I/O port D bit 0 / PSP0 |
| Pin 33 | RD1 — I/O port D bit 1 / PSP1 |
| Pin 34 | RD2 — I/O port D bit 2 / PSP2 |
| Pin 35 | RD3 — I/O port D bit 3 / PSP3 |
| Pin 36 | RD4 — I/O port D bit 4 / PSP4 |
| Pin 37 | RD5 — I/O port D bit 5 / PSP5 / PWM |
| Pin 38 | RD6 — I/O port D bit 6 / PSP6 / PWM |
| Pin 39 | RD7 — I/O port D bit 7 / PSP7 / PWM |
| Pin 40 | AVSS — Analog ground |
| Pin 41 | AVDD — Analog supply |
| Pin 42 | RF0 — I/O port F bit 0 / AN17 |
| Pin 43 | RF1 — I/O port F bit 1 / AN18 |
| Pin 44 | RF2 — I/O port F bit 2 / AN19 |
| Pin 45 | RF3 — I/O port F bit 3 / AN20 |
| Pin 46 | RF4 — I/O port F bit 4 / AN21 |
| Pin 47 | RF5 — I/O port F bit 5 / AN22 |
| Pin 48 | RF6 — I/O port F bit 6 / AN23 |
| Pin 49 | RF7 — I/O port F bit 7 / AN24 |
| Pin 50 | RG0 — I/O port G bit 0 |
| Pin 51 | RG1 — I/O port G bit 1 |
| Pin 52 | RG2 — I/O port G bit 2 |
| Pin 53 | RG3 — I/O port G bit 3 |
| Pin 54 | RG4 — I/O port G bit 4 |
| Pin 55 | MCLR — Master Clear reset / programming voltage input |
| Pin 56 | RH0 — I/O port H bit 0 / AN25 |
| Pin 57 | RH1 — I/O port H bit 1 / AN26 |
| Pin 58 | RH2 — I/O port H bit 2 / AN27 |
| Pin 59 | RH3 — I/O port H bit 3 / AN28 |
| Pin 60 | VDD — Digital supply |
| Pin 61 | VSS — Digital ground |
| Pin 62 | RH4 — I/O port H bit 4 / AN29 |
| Pin 63 | RH5 — I/O port H bit 5 / AN30 |
| Pin 64 | RH6 — I/O port H bit 6 / AN31 |
Typical Applications
PIC18F66K40T-E/PTVAO is suitable for 6 applications: Automotive Body & Sensor ECUs, Industrial Sensor Hubs & PLCs, Low-Power IoT Edge Nodes, Consumer Appliance Control Boards, Motor Control & PWM Drivers, HVAC & Fan Speed Controllers.
Automotive Body & Sensor ECUs
The PIC18F66K40T-E/PTVAO targets automotive body and sensor ECUs that must operate from -40C to +125C while drawing under 50 nA in standby. Its 64KB Flash and 4KB RAM host CAN/UART/LIN protocol stacks for BCM, lighting, and seat modules. The 5V-tolerance replaces legacy PIC16 designs without re-spins.
Recommended
Industrial Sensor Hubs & PLCs
The 10-bit ADC2 with hardware averaging makes PIC18F66K40T-E/PTVAO well suited to multi-channel analog sensor acquisition in industrial PLC and process-control modules. CIPs handle timing-critical encoder or PWM tasks so the CPU can downclock, freeing headroom for Modbus RTU communications and edge filtering without jitter.
Recommended
Low-Power IoT Edge Nodes
XLP technology on PIC18F66K40T-E/PTVAO delivers deep-sleep currents under 50 nA, making the part attractive for battery-powered IoT sensor nodes such as wireless thermostats and remote environmental monitors. ADC2 can wake on analog threshold, while SMT gates wake events on PWM edges, extending coin-cell life beyond multi-year targets.
Recommended
Consumer Appliance Control Boards
Wide 2.3V-5.5V supply tolerance on PIC18F66K40T-E/PTVAO simplifies power design for washing machines, dishwashers, and induction cooktops. The K40 family integrates FVR, comparator-based zero-cross detection, and CWG for triac/IGBT drive, reducing BOM count in cost-sensitive mass-production appliance controllers.
Recommended
Motor Control & PWM Drivers
PIC18F66K40T-E/PTVAO integrates CWG (Complementary Waveform Generator) and PWM that fit BLDC, stepper, and full-bridge motor drivers up to a few hundred watts. Hardware dead-band control and the HLT hardware limit timer close critical fault paths in microseconds without firmware latency.
Recommended
HVAC & Fan Speed Controllers
The PIC18F66K40T-E/PTVAO's SMT timer captures tachometer pulses from brushless DC fans with sub-microsecond resolution, enabling closed-loop RPM control in HVAC ducts. Its 5V-tolerant I/O directly drives opto-coupled triac interfaces while the ADC monitors NTC thermistors for thermal regulation feedback.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F66K40T-E/PTVAO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F66K40T-I/PT | PIC18F66K40-E/PTVAO | PIC18F66K40-E/PT | PIC18F67K40-I/PT | PIC18F66K22T-I/PT |
|---|---|---|---|---|---|---|
| Package | 64-TQFP (10x10 mm) | 64-TQFP - same | 64-TQFP - same | 64-TQFP - same | 64-TQFP - same | 64-TQFP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Flash | 64 KB | 64 KB | 64 KB | 64 KB | 128 KB | 64 KB |
| Maximum Clock | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Operating Voltage | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.7 V to 5.5 V |
| Operating Temperature | -40C to +125C (E grade) | -40C to +85C (I grade) | -40C to +125C (E grade) | -40C to +125C (E grade) | -40C to +85C (I grade) | -40C to +85C (I grade) |
| RAM | 4 KB | 4 KB | 4 KB | 4 KB | 8 KB | 4 KB |
| Core Independent Peripherals (CIP) | ADC2, CWG, SMT, HLT, WWDT | ADC2, CWG, SMT, HLT, WWDT | ADC2, CWG, SMT, HLT, WWDT | ADC2, CWG, SMT, HLT, WWDT | ADC2, CWG, SMT, HLT, WWDT | Limited CWG, no ADC2 / SMT / HLT |
Key Differentiators
- PPAP-capable automotive-grade variant in TQFP-64 (vs PIC18F66K40T-I/PT)
- Core Independent Peripherals (CIP) offload CPU (vs PIC18F66K22T-I/PT)
- Family scalability within same footprint (vs PIC18F66K22T-I/PT)
Design Notes
Decouple both AVDD and VDD independently on PIC18F66K40T-E/PTVAO. Place 10uF bulk ceramic + 0.1uF X7R at each AVDD/VDD pin pair within 5 mm of the package. Use a ferrite bead between digital VDD and analog AVDD to keep switching noise below 5 mV on the ADC rail, which is critical when running the 10-bit ADC2 at 200 kS/s conversion rates.
The 64-pin TQFP package on PIC18F66K40T-E/PTVAO has a theta_JA of approximately 49 C/W (4-layer JEDEC EIA/JESD51-7). At the maximum 64 MHz CPU clock and 5V supply at full I/O load, the device still draws under 15 mA so self-heating is negligible in automotive environments; however, ensure airflow in sealed under-hood enclosures or derate by 10C if board is stacked against a heat source.
Route the ICSP signals (ICSCLK/ICSDAT on RB6/RB7) to an in-circuit programming header or test pad to keep production line firmware updates viable. Keep ICP/ICSP traces short (<50 mm) and isolated from switching nodes; share no layer adjacent to high-dv/dt SMPS or motor gate traces.
PIC18F66K40T-E/PTVAO pins (RE3, RF6) have analogue-share caveats - RE3 is a general I/O only when MCLR is disabled, so failure to drive the configuration bit will silently route it as MCLR and break wake-up behaviour. Always verify CONFIG3H<MCLRE> in code and Microchip's MPLAB-X MCC pin manager before locking down the BOM. Unused I/O must be set as outputs low to avoid floating-input shoot-through at high temperature.
For PWM/CWG outputs on PIC18F66K40T-E/PTVAO switching gate drivers, place a 33 ohm series resistor at the GPIO to dampen ringing and keep edges below 5 ns/V. Add 100 pF to GND on each PWM output to form an RC snubber; this combination typically cuts EMI peaks by 8-12 dB on a typical BLDC half-bridge.
Compliance Information
AEC-Q100 automotive qualified per the -E suffix and PPAP-capable VAO suffix. RoHS/REACH compliant per Microchip product declarations. Halogen-free per Microchip PCN documents.
