PIC16F1455T-I/ST - 8-bit USB MCU, 14KB Flash, 48MHz | Microchip
MPN: PIC16F1455T-I/ST ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.45 | $3.45 |
| 10 | $3.11 | $31.10 |
| 100 | $2.62 | $262.00 |
| 500 | $2.21 | $1,105.00 |
| 1,000 | $1.92 | $1,920.00 |
PIC16F1455T-I/ST Overview
A microcontroller (MCU) is a single-chip computer containing a CPU core, non-volatile program memory, working RAM, and a programmable set of peripherals (timers, ADC, communication blocks, I/O). Within the semiconductor taxonomy, an MCU is a sub-class of integrated circuit; PIC16F1455 sits under Microcontrollers -> Integrated Circuits. The 'F' suffix denotes Flash memory, 'T' denotes Tape and Reel packaging, 'I' denotes the industrial -40C to +85C temperature range, and 'ST' denotes the 14-pin TSSOP outline.
Key features include 14KB (8K x 14) Flash, 1024 bytes SRAM, 0-byte data EEPROM, USB 2.0 full-speed transceiver (12 Mbps), up to 12 I/O pins, a 10-bit ADC with up to 9 channels, two 8-bit timers and one 16-bit timer, enhanced PWM, and a configurable 48MHz internal oscillator. XLP (eXtreme Low Power) technology enables < 50 nA typical sleep current, suiting battery-powered designs. The device operates from 2.3V to 5.5V.
The PIC16F1455 uses Microchip's enhanced mid-range core with a 200 ns instruction cycle at 20 MHz (or 83 ns at 48 MHz) and a single-cycle hardware multiplier. Its integrated USB 2.0 transceiver eliminates the need for an external USB PHY, lowering BOM cost and board area in HID, CDC, and custom-class USB peripherals. The peripheral pin select (PPS) feature remaps digital functions to free I/O pins, simplifying PCB routing on a 14-pin footprint.
Typical applications include USB HID peripherals (keyboards, mice, custom input devices), USB-to-UART bridges (CDC class), small sensor hubs, learning and hobbyist USB development boards (e.g., PICkit-compatible boards), and low-cost industrial controllers where USB connectivity and low sleep current are co-requirements.
When designing with this part, ensure the VUSB pin has a 220 nF decoupling capacitor and the D+/D- lines have 27 ohm series resistors as recommended by the Microchip datasheet. The internal 48 MHz oscillator is accurate enough for USB but may require periodic SOSC calibration across USB IF, common in remote-sensing endpoints.
This page synthesizes current distributor pricing, drop-in alternatives sharing the TSSOP-14 footprint, and practical design notes not consolidated in any single manufacturer document.
Drop-in alternatives for PIC16F1455T-I/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 PIC16F1455T-I/ST (same form factor and footprint) — differing in Package, I/O Pins, Internal Oscillator, Operating Temperature, MSL Level.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F1455-I/ST
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F1454T-I/ST
✅ Drop-In✓ In Stock
$1.41 / Unit
View Datasheet →PIC16F1455-E/ST
✅ Drop-In✓ In Stock
$0.95 / Unit
View Datasheet →PIC16F1455-I/JQ
✅ Drop-In✓ In Stock
$1.27 / Unit
View Datasheet →PIC16F1455-I/SL
✅ Drop-In✓ In Stock
$1.55 / Unit
View Datasheet →PIC16F1459-I/P
✅ Drop-In✓ In Stock
$2.16 / Unit
View Datasheet →PIC16F1455T-I/ST Maximum Ratings & Electrical Characteristics
| Core | PIC16 enhanced mid-range 8-bit RISC |
| Program Memory | 14 KB Flash (8K x 14) |
| SRAM | 1024 bytes |
| Data EEPROM | 0 bytes |
| Maximum CPU Speed | 48 MHz (12 MIPS) |
| USB | USB 2.0 full-speed transceiver (12 Mbps) on-chip |
| Operating Voltage (Vdd) | 2.3 V to 5.5 V |
| I/O Pins | 12 |
| ADC | 10-bit, up to 9 channels |
| Timers | 2 x 8-bit, 1 x 16-bit |
| PWM Channels | Enhanced CCP, multiple PWM |
| Internal Oscillator | 48 MHz HFINTOSC (USB-accurate) |
| Package | TSSOP-14 |
| Operating Temperature (I grade) | -40 C to +85 C |
| Mounting Type | Surface Mount |
| MSL Level | 1 |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC16F1455T-I/ST Pin Configuration
| Pin 1 | VDD — Positive supply voltage |
| Pin 2 | RA5 — Digital I/O / analog input |
| Pin 3 | RA4 — Digital I/O |
| Pin 4 | RA3/MCLR/VPP — Digital I/O / Master Clear / programming voltage |
| Pin 5 | RC5 — Digital I/O |
| Pin 6 | RC4 — Digital I/O |
| Pin 7 | RC3 — Digital I/O |
| Pin 8 | RC2 — Digital I/O |
| Pin 9 | RC1 — Digital I/O / analog input |
| Pin 10 | RC0 — Digital I/O / analog input |
| Pin 11 | RA1 — Digital I/O / analog input / ICSPDAT |
| Pin 12 | RA0 — Digital I/O / analog input / ICSPCLK |
| Pin 13 | VSS — Ground reference |
| Pin 14 | RA2 — Digital I/O / analog input |
Typical Applications
PIC16F1455T-I/ST is suitable for 6 applications: USB HID Input Device, USB-to-UART Bridge (CDC Class), Low-Cost Sensor Hub with USB Reporting, Custom USB Vendor-Class Peripheral, Learning / Hobbyist USB Development Board, Industrial Controller with USB Diagnostics Port.
USB HID Input Device
The PIC16F1455T-I/T is a strong fit for USB HID peripherals such as keyboards, mice, custom input buttons, and game controllers. Its on-chip USB 2.0 full-speed transceiver (12 Mbps) eliminates an external PHY, and Microchip's free USB HID stack with the HID Bootloader handles enumeration and report generation without royalty. With 14KB Flash and 1024 bytes SRAM, the device supports descriptor tables, polling loops, and modest firmware for multi-key rollover or sensor sampling. At 12 MIPS from the 48 MHz HFINTOSC, debounce loops run comfortably under 1 ms. Place 27 ohm series resistors on D+/D- and a 220 nF decoupling cap on VUSB per the Microchip datasheet to meet USB signal integrity.
Recommended
USB-to-UART Bridge (CDC Class)
The PIC16F1455T-I/T serves as a compact USB-to-UART bridge using the CDC (Communications Device Class) profile, replacing bulkier FTDI-style cables on embedded boards. The integrated USB transceiver handles enumeration, while the EUSART peripheral (configurable up to several hundred kBaud) drives TX/RX to a host MCU. With 1024 bytes SRAM and 14KB Flash, the device comfortably hosts Microchip's CDC stack plus bootloader and limited protocol glue. Operating from 2.3 V to 5.5 V on VDD, it interfaces directly with both 3.3 V and 5 V host MCUs, eliminating level shifters in mixed-voltage designs. The XLP sleep mode drops quiescent current to under 50 nA between USB events.
Recommended
Low-Cost Sensor Hub with USB Reporting
The PIC16F1455T-I/T functions as a USB-attached sensor hub, reading analog or digital sensors through its 10-bit ADC (up to 9 channels) and reporting over USB HID or CDC. Its 1024 bytes SRAM buffers sensor samples between USB polls, while 14KB Flash stores calibration tables, sensor drivers, and HID report descriptors. The 48 MHz HFINTOSC keeps timing tight for synchronizing ADC conversions with USB frames. XLP technology delivers < 50 nA sleep current, suiting wall-powered or USB-bus-powered sensor modules that need to minimize idle draw. Optional PPS routing lets designers place sensor I/O on the most PCB-friendly pins.
Recommended
Custom USB Vendor-Class Peripheral
The PIC16F1455T-I/T supports vendor-specific USB device classes, allowing designers to define proprietary protocols for test instruments, programming tools, or accessories that do not fit standard HID/CDC/MSC profiles. Microchip's USB stack supplies the enumeration layer; the application firmware defines the bulk/control endpoint behavior. The 48 MHz core supports 12 MIPS, leaving headroom for custom protocol parsing in firmware. With 12 I/O pins and PPS remapping, the TSSOP-14 footprint can simultaneously drive status LEDs, user buttons, and the USB bus, while an external SPI/I2C peripheral extends functionality where the 14-pin budget falls short.
Recommended
Learning / Hobbyist USB Development Board
The PIC16F1455T-I/T is a favorite target for PICkit-programmable hobbyist boards and educational kits due to its integrated USB, free Microchip USB stack, and 14KB of Flash that comfortably accommodates teaching firmware. Designers can use the on-chip 48 MHz oscillator to avoid external crystals, simplifying breadboard layouts. The TSSOP-14 package breaks out 12 I/O pins plus VDD, VSS, and the USB pair, leaving enough I/O for buttons, LEDs, and a UART header. Students benefit from the active Microchip community, free MPLAB X IDE, and XC8 compiler with sample HID projects that blink LEDs on USB enumeration.
Recommended
Industrial Controller with USB Diagnostics Port
The PIC16F1455T-I/T fits industrial controllers that expose a USB diagnostics port for field configuration, firmware updates, and log retrieval. The integrated USB transceiver, 2.3 V to 5.5 V supply range, and optional -40 C to +125 C operation in the E-grade variant make it industrial-friendly. With 14KB Flash, the device stores both control firmware and a USB bootloader that allows secure ICSP firmware upgrades from a host laptop. PPS routing simplifies the layout when the same 14-pin footprint must route to both analog sensor conditioning and USB lines on opposite sides of the board.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F1455T-I/ST — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1455-I/ST | PIC16F1454T-I/ST | PIC16F1455-E/ST | PIC16F1455-I/JQ | PIC16F1455-I/SL | PIC16F1459-I/P |
|---|---|---|---|---|---|---|---|
| Package | TSSOP-14 | TSSOP-14 (tube) | TSSOP-14 | TSSOP-14 | UQFN-16 | SOIC-14 | DIP-20 |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 14 KB | 14 KB | 7 KB (-50%) | 14 KB | 14 KB | 14 KB | 14 KB |
| SRAM | 1024 bytes | 1024 bytes | 1024 bytes | 1024 bytes | 1024 bytes | 1024 bytes | 1024 bytes |
| Max CPU Speed | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| USB Transceiver | On-chip USB 2.0 FS | On-chip USB 2.0 FS | On-chip USB 2.0 FS | On-chip USB 2.0 FS | On-chip USB 2.0 FS | On-chip USB 2.0 FS | On-chip USB 2.0 FS |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C (extended) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| I/O Pins | 12 | 12 | 12 | 12 | 12 | 12 | 17 |
| Packaging | Tape & Reel | Tube | Tape & Reel | Tube | Tube | Tube | Tube |
Key Differentiators
- 14KB Flash vs 7KB on PIC16F1454 in same TSSOP-14 package (vs PIC16F1454T-I/ST)
- Industrial -40C to +85C vs automotive -40C to +125C temp range on E variant (vs PIC16F1455-E/ST)
- Tape-and-reel vs tube packaging on the same TSSOP-14 silicon (vs PIC16F1455-I/ST)
Design Notes
Place a 220 nF decoupling capacitor on VUSB as close to the pin as possible, plus a 100 nF on VDD. The D+/D- lines require 27 ohm series resistors (one per line) placed near the MCU pins, per Microchip datasheet recommendations. Keep the D+/D- traces short, length-matched, and routed as a differential pair (90 ohm nominal) to meet USB 2.0 signal-integrity specifications.
Do not assume any PIC16F145x pin is 5V tolerant - all I/O pins are limited to VDD + 0.3V. Ensure pull-ups on MCLR (RA3) are below 50k ohm to avoid unintentional resets during noise events. The 48 MHz HFINTOSC must remain at 48 MHz for USB to stay within the +/- 0.25% accuracy budget; do not change oscillator tuning bytes during USB operation without re-locking.
The PIC16F1455T-I/T draws roughly 6 mA at 48 MHz across 5V, but XLP sleep mode drops quiescent current to < 50 nA typical. For USB self-powered designs, ensure VBUS sensing logic does not backfeed the regulator. Estimated: at 25 C ambient and 48 MHz active, the 14-pin TSSOP dissipates ~30 mW, well within the 800 mW thermal budget on standard JEDEC EIA/JESD51 test boards.
Compliance Information
RoHS and lead-free per Microchip product page. Not AEC-Q100 qualified as I-grade; the PIC16F1455-E/ST variant offers extended temperature range suitable for industrial and some automotive under-hood applications.
