PIC16F1454-E/ST - 8-bit 48MHz USB MCU 14KB Flash TSSOP-14 | Microchip
MPN: PIC16F1454-E/ST ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.62 | $1.62 |
| 10 | $1.42 | $14.20 |
| 100 | $1.18 | $118.00 |
| 500 | $0.95 | $475.00 |
| 1,000 | $0.82 | $820.00 |
| 3,000 | $0.72 | $2,160.00 |
PIC16F1454-E/ST Overview
An 8-bit PIC microcontroller is a RISC-based embedded controller that combines a CPU core, non-volatile program memory, data RAM, and configurable peripherals on a single CMOS die. The PIC16F1454 belongs to the broader PIC16F family (mid-range architecture) within Microchip's PIC microcontroller hierarchy, which extends upward to PIC18, PIC24, dsPIC, and PIC32 families. Its niche is cost-sensitive, USB-enabled, low-power embedded designs that require more capability than a basic PIC10/12 but more compact BOM than a PIC18.
Key features include 14 KB self-read/write Flash, 1 KB RAM, 128 B EEPROM-style non-volatile data storage, an internal 48 MHz oscillator with USB clock recovery, 12 I/O pins, and a peripheral set covering 10-bit ADC, PWM, comparators, USART, SPI, and I2C. The device carries Microchip's eXtreme Low Power (XLP) label, with sleep currents typically in the nanoampere range, and includes brown-out reset, power-on reset, and a watchdog timer for field reliability.
Architecturally, the PIC16F1454 uses a 14-bit instruction word modified Harvard core with a 16-level hardware stack and a 49-instruction set. The integrated USB module includes an internal voltage regulator and on-chip transceiver, supporting bus-powered and self-powered designs. Internal PLLs derive the 48 MHz system clock from a lower-frequency source, enabling low-power operation while preserving USB timing accuracy.
Typical applications include USB HID peripherals such as keyboards, mice, game controllers and custom input devices; USB-to-UART bridge dongles and CDC virtual COM ports; low-cost USB sensor nodes and data loggers; small appliances with USB charging or diagnostic interfaces; and consumer electronics such as gaming mice and USB dongles. The combination of on-chip USB, internal oscillator, and XLP makes it especially well suited to bus-powered, battery-friendly devices.
When designing with the PIC16F1454-E/ST, ensure the VUSB pin has the required 220 nF decoupling capacitor to the VDD3V3 pin for the internal USB voltage regulator, and provide proper D+/D- series resistors (typically 33 ohm) matched to the PCB trace impedance. For non-USB applications, MPLAB X IDE with XC8 and MPLAB Code Configurator (MCC) simplifies peripheral setup. This page consolidates distributor pricing, drop-in alternatives, and practical design notes beyond the manufacturer datasheet content.
Drop-in alternatives for PIC16F1454-E/ST — 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 PIC16F1454-E/ST (same form factor and footprint) — differing in Package, I/O Pins, Timers, USB Module, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F1455-E/ST
✅ Drop-In✓ In Stock
$0.95 / Unit
View Datasheet →PIC16F1454-I/ST
✅ Drop-In✓ In Stock
$1.02 / Unit
View Datasheet →PIC16F1454-E/P
✅ Drop-In✓ In Stock
$1.32 / Unit
View Datasheet →PIC16F1459-I/P
✅ Drop-In✓ In Stock
$2.16 / Unit
View Datasheet →PIC18F14K50-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F1454-E/ST Maximum Ratings & Electrical Characteristics
| Core | PIC16 enhanced mid-range 8-bit |
| Instruction Set | 49 instructions, 14-bit word |
| Max CPU Frequency | 48 MHz |
| Program Memory (Flash) | 14 KB |
| RAM | 1 KB |
| Non-volatile Data Storage | 128 B (HEF) |
| I/O Pins | 12 |
| Package | 14-pin TSSOP |
| Mounting Type | Surface Mount |
| Supply Voltage | 2.3 V to 5.5 V |
| USB Module | USB 2.0 Full-Speed with clock recovery |
| Communication | I2C, SPI, USART, USB |
| Operating Temperature | -40C to +125C (E = extended) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC16F1454-E/ST Pin Configuration
| Pin 1 | VDD — Positive supply voltage (2.3V to 5.5V) |
| Pin 2 | RA5 — Digital I/O / ICSP programming clock |
| Pin 3 | RA4 — Digital I/O |
| Pin 4 | RA3/MCLR/VPP — Master Clear (reset) input or digital I/O |
| Pin 5 | RC5/CCP1 — Digital I/O or Capture/Compare/PWM 1 |
| Pin 6 | RC4 — Digital I/O |
| Pin 7 | RC3/AN7 — Digital I/O or analog input 7 |
| Pin 8 | RC6/AN8 — Digital I/O or analog input 8 |
| Pin 9 | RC7/AN9/D- — Digital I/O, analog input 9, or USB D- |
| Pin 10 | RB7/AN10/D+ — Digital I/O, analog input 10, or USB D+ |
| Pin 11 | RB6/AN11 — Digital I/O or analog input 11 |
| Pin 12 | RB5/AN13 — Digital I/O or analog input 13 |
| Pin 13 | VSS — Ground reference |
| Pin 14 | VUSB/VDD3V3 — Internal 3.3V USB regulator output (decouple with 220nF) |
Typical Applications
PIC16F1454-E/ST is suitable for 6 applications: USB HID Input Devices, USB to UART Bridge Dongle, USB Sensor Data Logger, Consumer USB Charging Dongles, USB Bootloader Host Devices, Educational and Maker Projects.
USB HID Input Devices
The PIC16F1454-E/ST is well matched to USB Human Interface Device (HID) class peripherals such as keyboards, mice, game controllers, and custom input devices. Its on-chip USB 2.0 full-speed SIE eliminates the need for an external crystal, while 14 KB Flash holds HID descriptors, report logic, and basic macro/lighting control. The XLP nanoWatt sleep mode lets battery-powered wireless HID dongles draw only a few microamps between host polls. With 12 I/O pins plus ADC, designers can attach capacitive touch pads, scroll wheels, or rotary encoders. USB enumeration is handled in firmware and the same MPLAB X toolchain supports HID bootloaders for field updates.
Recommended
USB to UART Bridge Dongle
The PIC16F1454-E/ST serves as a USB CDC virtual COM port bridge, replacing legacy RS-232 with a low-cost, BOM-friendly USB interface. The integrated USB SIE plus the on-chip USART provide a clean CDC-to-UART channel at up to 115.2 kBaud or higher, while 1 KB RAM buffers short bursts without overrun. The internal 3.3 V USB regulator removes a separate LDO, shrinking the dongle to fit inside a USB-A connector shell. Designers can route TX/RX to external MCU targets using a 4-wire header. This topology is widely used in debug cables, flash programmers, and industrial sensor adapters where a stable, driver-free COM port is required.
Recommended
USB Sensor Data Logger
For portable USB sensor data loggers, the PIC16F1454-E/ST combines 14 KB Flash with 128 B HEF for non-volatile parameter storage, suitable for temperature, humidity, vibration, or current-sensing front-ends. Its 10-bit ADC digitizes sensor signals while the USB CDC interface streams logged data to a host PC without additional drivers. The XLP nanoWatt sleep modes keep idle current in the nA range, extending field deployments of weeks or months from a single CR2032 cell. Brown-out reset and the watchdog timer protect log integrity during brownouts. The 14-pin TSSOP package is well suited to compact wearable or environmental logger enclosures.
Recommended
Consumer USB Charging Dongles
USB diagnostic and charging dongles use the PIC16F1454-E/ST to monitor VBUS voltage and current, expose results over USB HID/CDC, and drive status LEDs for end users. The internal USB regulator simplifies powering from VBUS, and 12 I/O plus ADC measure voltage drops across a sense resistor with reasonable accuracy. A small firmware footprint fits in the 14 KB Flash, leaving headroom for protocol stacks such as USB Power Delivery negotiation. Designers often add a single RGB LED driven by PWM outputs to indicate charge state. The TSSOP-14 footprint supports miniature dongle housings that fit adjacent to USB-A ports.
Recommended
USB Bootloader Host Devices
The PIC16F1454-E/ST is frequently deployed as a USB device that updates firmware on external targets through a USB-to-SPI or USB-to-I2C bridge. The on-chip USB SIE handles enumeration while the SPI/I2C peripherals drive target MCUs, with the 14 KB Flash storing bootloader logic, command parsers, and CRC verification. Its 200 ns instruction cycle enables fast page-programming sequences, keeping flash update latency low. A status LED, mode select button, and a small push button for bootloader entry round out a typical reference design. Many production programmers ship using this topology.
Recommended
Educational and Maker Projects
The PIC16F1454-E/ST is a popular choice for USB-enabled educational boards and maker projects due to its low cost, integrated USB, and free MPLAB X IDE with XC8 toolchain. Curiosity boards and breadboard-friendly PCBs use this part to teach USB enumeration, GPIO control, ADC, and PWM through example projects. The internal oscillator eliminates crystal wiring for student labs, and the TSSOP-14 footprint is simple to break out on a 2-layer PCB. Sample firmware includes USB HID mouse, USB CDC echo, and PWM audio demos that fit comfortably within 14 KB Flash. This combination lowers the entry barrier to embedded USB programming.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F1454-E/ST — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1455-E/ST | PIC16F1454-I/ST | PIC16F1454-E/P | PIC16F1459-I/P | PIC18F14K50-I/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TSSOP-14 | TSSOP-14 - same | TSSOP-14 - same | PDIP-14 - same pin count | PDIP-20 - 6 extra pins | SSOP-20 - 6 extra pins |
| Flash Memory | 14 KB | 8 KB (-43%) | 14 KB (same) | 14 KB (same) | 14 KB (same) | 16 KB (+14%) |
| RAM | 1 KB | 512 B (-50%) | 1 KB (same) | 1 KB (same) | 1 KB (same) | 768 B (-25%) |
| Max CPU Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| USB Module | USB 2.0 FS + clock recovery | USB 2.0 FS + clock recovery | USB 2.0 FS + clock recovery | USB 2.0 FS + clock recovery | USB 2.0 FS + clock recovery | USB 2.0 FS (no internal reg) |
| I/O Pins | 12 | 12 (same) | 12 (same) | 12 (same) | 17 (+5) | 15 (+3) |
| Operating Temperature | -40C to +125C (Extended) | -40C to +125C | -40C to +85C (Industrial) | -40C to +125C | -40C to +85C | -40C to +85C |
| Approx. Unit Price @ 100 pcs | $1.18 | $1.05 (-11%) | $1.15 (-3%) | $1.40 (+19%) | $1.55 (+31%) | $2.15 (+82%) |
Key Differentiators
- On-chip USB regulator and clock recovery eliminate external components (vs PIC18F14K50-I/SS)
- More Flash than PIC16F1455 for richer USB firmware stacks (vs PIC16F1455-E/ST)
- Lower cost than PIC18 with same USB module (vs PIC18F14K50-I/SS)
Design Notes
The PIC16F1454-E/ST includes an internal 3.3 V USB regulator on the VUSB pin (pin 14) that supplies the USB transceiver and pull-ups. Place a 220 nF low-ESR ceramic decoupling capacitor as close as possible between VUSB and VSS to meet USB-IF electrical compliance. For bus-powered designs drawing more than 100 mA, Microchip recommends a 4.7 uF bulk capacitor on VDD and a ferrite bead between VUSB and VDD. Do not connect VUSB directly to an external 3.3 V rail unless the regulator is disabled in configuration bits, or back-powering can damage the die.
Route the USB D+ and D- differential pair with 90 ohm differential impedance and matched trace lengths to within 150 mil. Place 33 ohm series resistors close to the PIC16F1454 D+/D- pins to dampen reflections and meet USB 2.0 full-speed signal quality. Keep the VUSB capacitor return path short and avoid routing noisy digital lines under the USB traces. The TSSOP-14 thermal pad is not present on this package, so a small copper pour on VDD/VSS helps dissipate minor thermal rise during sustained USB transmissions.
Configuration bits must be set to enable the internal USB regulator (CONFIG2L<USBREGEN>) and to select the internal oscillator (FOSC<3:0>) for the most common USB designs; otherwise the device will not enumerate. Do not use the MCLR pin as a generic input without an external pull-up, or the device may randomly reset. The 14 KB Flash is partitioned as 8K x 14 words; constant tables written with __builtin_tblwt() must be aligned to 16-word boundaries. Estimated: at 48 MHz active, active current is roughly 6-8 mA per the datasheet typical curves - confirm with your specific peripheral mix.
Compliance Information
RoHS and lead-free per Microchip product page. Not AEC-Q100 qualified; for automotive USB applications use AEC-Q100-qualified variants from Microchip's PIC16F1xxx family. E suffix in MPN indicates Extended temperature range (-40C to +125C).