DEVICE OVERVIEW
The PIC16(L)F1454/5/9 are described within this data sheet. They are available in 14/20-pin packages.
Figure 1-1 shows a block diagram of the PIC16(L)F1454/5/9 devices. Tables 1-2, 1-3 and 1-4 show the pinout descriptions.
Reference Table 1-1 for peripherals available per device.

High-Performance RISC CPU:
• C Compiler Optimized Architecture
• Only 49 Instructions
• 14 Kbytes Linear Program Memory Addressing
• 1024 Bytes Linear Data Memory Addressing
• Operating Speed:
   - DC – 48 MHz clock input
   - DC – 83 ns instruction cycle
   - Selectable 3x or 4x PLL for specific frequencies
• Interrupt Capability with Automatic Context Saving
• 16-Level Deep Hardware Stack with Optional Overflow/Underflow Reset
• Direct, Indirect and Relative Addressing modes:
   - Two full 16-bit File Select Registers (FSRs) capable of accessing both data or program memory
   - FSRs can read program and data memory

Special Microcontroller Features:
• Operating Voltage Range:
   - 1.8V to 3.6V (PIC16LF145X)
   - 2.3V to 5.5V (PIC16F145X)
• Self-Programmable under Software Control
• Power-on Reset (POR)
• Power-up Timer (PWRT)
• Programmable Brown-Out Reset (BOR)
• Low-Power BOR (LPBOR)
• Extended Watchdog Timer (WDT):
   - Programmable period from 1 ms to 256s
• Programmable Code Protection
• In-Circuit Serial Programming™ (ICSP™) via Two Pins
• Enhanced Low-Voltage Programming (LVP)
• Power-Saving Sleep mode:

Universal Serial Bus (USB) Features:
• Self-Tuning from USB Host (eliminates need for external crystal)
• USB V2.0 Compliant SIE
• Low Speed (1.5 Mb/s) and Full Speed (12 Mb/s)
• Supports Control, Interrupt, Isochronous and Bulk Transfers
• Supports up to Eight Bidirectional Endpoints
• 512-Byte Dual Access RAM for USB
• Interrupt-on-Change (IOC) on D+/D- for USB Host Detection
• Configurable Internal Pull-up Resistors for use with USB

Extreme Low-Power Management PIC16LF145X with XLP:
• Sleep mode: 25 nA @ 1.8V, typical
• Watchdog Timer Current: 290 nA @ 1.8V, typical
• Timer1 Oscillator: 600 nA @ 32 kHz, typical
• Operating Current: 25 A/MHz @ 1.8V, typical

Flexible Oscillator Structure:
• 16 MHz Internal Oscillator Block:
   - Factory calibrated to ±0.25%, typical
   - Software selectable frequency range from 16 MHz to 31 kHz
   - Tunable to 0.25% across temperature range
   - 48 MHz with 3x PLL
• 31 kHz Low-Power Internal Oscillator
• Clock Switching with run from:
   - Primary Oscillator
   - Secondary Oscillator (SOSC)
   - Internal Oscillator
• Clock Reference Output:
   - Clock Prescaler
   - CLKOUT  (Continue....)