PIC18F66K22-E/PT - 64KB Flash 8-bit MCU with nanoWatt XLP | Microchip
MPN: PIC18F66K22-E/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.95 | $8.95 |
| 10 | $8.05 | $80.50 |
| 100 | $7.15 | $715.00 |
| 500 | $6.45 | $3,225.00 |
| 1,000 | $5.8 | $5,800.00 |
PIC18F66K22-E/PT Overview
Drop-in alternatives for PIC18F66K22-E/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 PIC18F66K22-E/PT (same form factor and footprint) — differing in Package, Timers, I/O Pins, Program Memory (Flash), Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F67K22-I/PT
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View Datasheet →PIC18F65K22-E/PT
✅ Drop-In✓ In Stock
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View Datasheet →PIC18F67K22-E/PT
✅ Drop-In✓ In Stock
$5.1 / Unit
View Datasheet →PIC18F66K22-I/PT
✅ Drop-In✓ In Stock
$3.96 / Unit
View Datasheet →PIC18F66J55-I/PT
✅ Drop-In✓ In Stock
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View Datasheet →PIC18F66K22-E/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18, 8-bit |
| Program Memory (Flash) | 64 KB |
| Data RAM | 4 KB |
| Data EEPROM | 1 KB |
| Maximum CPU Speed | 64 MHz (16 MIPS) |
| Operating Voltage Range | 1.8 V to 5.5 V |
| ADC | 12-bit, up to 16 channels |
| Analog Comparators | 2 |
| CTMU (Capacitive Touch) | Yes |
| UART/USART | 2x Enhanced USART |
| SPI | 2x MSSP (SPI/I2C) |
| I2C | 2x MSSP (SPI/I2C) |
| Timers | 8-/16-bit, multiple |
| CCP/ECCP Modules | Yes |
| Operating Temperature | -40 C to +125 C (E grade) |
| Package | 64-pin TQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
| AEC-Q100 | Qualified |
PIC18F66K22-E/PT Pin Configuration
| Pin 1 | RH0 — I/O port H bit 0 |
| Pin 2 | RH1 — I/O port H bit 1 |
| Pin 3 | RH2 — I/O port H bit 2 |
| Pin 4 | RH3 — I/O port H bit 3 |
| Pin 5 | RF0 — I/O port F bit 0 |
| Pin 6 | RF1 — I/O port F bit 1 |
| Pin 7 | RF2 — I/O port F bit 2 |
| Pin 8 | RF3 — I/O port F bit 3 |
| Pin 9 | RF4 — I/O port F bit 4 |
| Pin 10 | RF5 — I/O port F bit 5 |
| Pin 11 | RF6 — I/O port F bit 6 |
| Pin 12 | RF7 — I/O port F bit 7 |
| Pin 13 | VSS — Ground reference |
| Pin 14 | VDD — Positive supply voltage (1.8 V to 5.5 V) |
| Pin 15 | RA0 — I/O port A bit 0 |
| Pin 16 | RA1 — I/O port A bit 1 |
| Pin 17 | RA2 — I/O port A bit 2 |
| Pin 18 | RA3 — I/O port A bit 3 |
| Pin 19 | RA4 — I/O port A bit 4 |
| Pin 20 | RA5 — I/O port A bit 5 |
| Pin 21 | RA6 — I/O port A bit 6 |
| Pin 22 | RA7 — I/O port A bit 7 |
| Pin 23 | VSS — Ground reference |
| Pin 24 | VDD — Positive supply voltage (1.8 V to 5.5 V) |
| Pin 25 | RB0 — I/O port B bit 0 |
| Pin 26 | RB1 — I/O port B bit 1 |
| Pin 27 | RB2 — I/O port B bit 2 |
| Pin 28 | RB3 — I/O port B bit 3 |
| Pin 29 | RB4 — I/O port B bit 4 |
| Pin 30 | RB5 — I/O port B bit 5 |
| Pin 31 | RB6 — I/O port B bit 6 |
| Pin 32 | RB7 — I/O port B bit 7 |
| Pin 33 | RC0 — I/O port C bit 0 |
| Pin 34 | RC1 — I/O port C bit 1 |
| Pin 35 | RC2 — I/O port C bit 2 |
| Pin 36 | RC3 — I/O port C bit 3 |
| Pin 37 | RC4 — I/O port C bit 4 |
| Pin 38 | RC5 — I/O port C bit 5 |
| Pin 39 | RC6 — I/O port C bit 6 |
| Pin 40 | RC7 — I/O port C bit 7 |
| Pin 41 | VSS — Ground reference |
| Pin 42 | VDD — Positive supply voltage (1.8 V to 5.5 V) |
| Pin 43 | RD0 — I/O port D bit 0 |
| Pin 44 | RD1 — I/O port D bit 1 |
| Pin 45 | RD2 — I/O port D bit 2 |
| Pin 46 | RD3 — I/O port D bit 3 |
| Pin 47 | RD4 — I/O port D bit 4 |
| Pin 48 | RD5 — I/O port D bit 5 |
| Pin 49 | RD6 — I/O port D bit 6 |
| Pin 50 | RD7 — I/O port D bit 7 |
| Pin 51 | VSS — Ground reference |
| Pin 52 | VDD — Positive supply voltage (1.8 V to 5.5 V) |
| Pin 53 | RE0 — I/O port E bit 0 |
| Pin 54 | RE1 — I/O port E bit 1 |
| Pin 55 | RE2 — I/O port E bit 2 |
| Pin 56 | RE3 — I/O port E bit 3 |
| Pin 57 | RE4 — I/O port E bit 4 |
| Pin 58 | RE5 — I/O port E bit 5 |
| Pin 59 | RE6 — I/O port E bit 6 |
| Pin 60 | RE7 — I/O port E bit 7 |
| Pin 61 | RG0 — I/O port G bit 0 |
| Pin 62 | RG1 — I/O port G bit 1 |
| Pin 63 | RG2 — I/O port G bit 2 |
| Pin 64 | RG3 — I/O port G bit 3 |
Typical Applications
PIC18F66K22-E/PT is suitable for 6 applications: Capacitive Touch User Interfaces, Automotive Body Control Modules, Battery-Powered IoT Sensor Nodes, Industrial Control and Instrumentation, Medical Portable Monitoring Devices, Consumer Appliance Control Boards.
Capacitive Touch User Interfaces
The PIC18F66K22-E/PT is well suited for capacitive touch HMI panels because its on-chip CTMU provides femtofarad-grade capacitance measurement with no external touch IC. Combined with the 12-bit ADC and 64-pin TQFP’s 53 I/O, designers can implement up to 30+ touch electrodes with proximity sensing. The nanoWatt XLP deep-sleep current under 20 nA lets battery-powered remotes wake on touch within 50 ms.
Recommended
Automotive Body Control Modules
With AEC-Q100 Grade 1 qualification and -40 C to +125 C operating range, the PIC18F66K22-E/PT targets BCM, lighting controllers, HVAC panels, and seat-control ECUs. The 64-pin TQFP provides 53 I/O for driving LED matrices, reading switch matrices, and interfacing LIN/CAN transceivers via the Enhanced USART. The 64 KB Flash supports OSEK/OSEKtime and AUTOSAR-light stacks.
Recommended
Battery-Powered IoT Sensor Nodes
The nanoWatt XLP technology delivers 20 nA typical deep-sleep current and 100 nA sleep with RTCC running, allowing years of operation on a single CR2032 coin cell. The 1.8 V to 5.5 V operating range accepts Li-Ion or 2xAA directly. The 12-bit ADC with 16 channels supports multi-sensor fusion (temperature, humidity, pressure) while the CTMU enables touch wake-up from sleep.
Recommended
Industrial Control and Instrumentation
The 64 MHz CPU delivers 16 MIPS for real-time PID control loops, while 2x Enhanced USART and 2x MSSP (SPI/I2C) ports connect to motor drivers, ADCs, DACs, and isolated communication ICs. The 12-bit ADC with 16 channels samples multiple sensor inputs at up to 100 ksps. Operating from 1.8 V to 5.5 V supports both 3.3 V and 5 V industrial bus interfaces.
Recommended
Medical Portable Monitoring Devices
Medical devices requiring reliable operation from low-voltage batteries benefit from the PIC18F66K22-E/PT’s XLP low-power modes and 12-bit ADC precision. The CTMU can measure respiratory waveforms via chest-strap capacitance changes. The -40 C to +125 C range handles sterilization and transport conditions. The 64 KB Flash supports Bluetooth/BLE command stacks via external RN4870 modules.
Recommended
Consumer Appliance Control Boards
The PIC18F66K22-E/PT drives washing machines, dishwashers, microwave ovens, and air conditioners where its 53 I/O handle keypads, displays, motor triac drives, and sensor feedback. The 64 KB Flash and 4 KB RAM support real-time operating systems and graphical LCD drivers. The wide operating voltage (1.8 V-5.5 V) tolerates unregulated SMPS rails in cost-sensitive appliances.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F66K22-E/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F67K22-I/PT | PIC18F65K22-I/PT | PIC18F65K22-E/PT | PIC18F67K22-E/PT | PIC18F66K22-I/PT | PIC18F66J55-I/PT |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-64 (10x10 mm) | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same |
| Flash Memory | 64 KB | 128 KB | 32 KB | 32 KB | 128 KB | 64 KB (same) | 96 KB |
| Operating Temperature | -40 C to +125 C (E grade) | -40 C to +85 C (I grade) | -40 C to +85 C (I grade) | -40 C to +125 C (E grade) | -40 C to +125 C (E grade) | -40 C to +85 C (I grade) | -40 C to +85 C (I grade) |
| CPU Speed | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 48 MHz (12 MIPS) |
| USB Peripheral | No | No | No | No | No | No | Yes (USB 2.0 FS) |
| RAM | 4 KB | 4 KB | 2 KB | 2 KB | 4 KB | 4 KB | 4 KB |
| AEC-Q100 | Qualified (Grade 1) | Qualified | Qualified | Qualified (Grade 1) | Qualified (Grade 1) | Qualified | Qualified |
Key Differentiators
- Highest Flash density with extended temperature in K22 TQFP-64 family (vs PIC18F65K22-E/PT)
- Extended -40 C to +125 C automotive temperature grade in standard catalog part (vs PIC18F66K22-I/PT)
- nanoWatt XLP deep-sleep current under 20 nA for battery applications (vs PIC18F66J55-I/PT)
Design Notes
Decoupling: Place 100 nF ceramic capacitors on every VDD/VSS pair (5 pairs across the 64-pin TQFP) within 3 mm of the pins. Add a single 10 uF bulk tantalum or ceramic capacitor near pin 14 (VDD). For battery-powered designs using deep sleep, a 4.7 uF hold-up capacitor on VDD prevents brown-out during CTMU touch wake events. The nanoWatt XLP deep-sleep current is typically 20 nA but can spike to 1 uA if decoupling is insufficient.
Crystal layout: For >32 MHz operation, use a fundamental-mode crystal or ceramic resonator with load capacitors matched to CL specification (typically 15-20 pF). Place crystal within 5 mm of OSC1/OSC2 pins (typically RA6/RA7). Use a ground guard ring around the crystal traces to minimize EMI coupling into ADC inputs. For EMI-sensitive applications, route the crystal on the top layer with no vias underneath.
ADC configuration: The 12-bit ADC requires a minimum acquisition time (TACQ) of approximately 1.4 us at 5 V. Do not skip the ACQT2:ACQT0 configuration bits - using the default 0 Tad acquisition yields incorrect ADC readings. For high-impedance sources (>10 kohm), add an external buffer op-amp or increase the acquisition time to 4 Tad or more. The internal bandgap reference requires 5 ms stabilization after enabling.
Compliance Information
AEC-Q100 Grade 1 qualified for automotive. RoHS and REACH compliant per Microchip product declaration. Lead-free (Pb-free) and halogen-free per Microchip PIC18F K22 family material composition datasheet.
