PIC16F1455-E/ST - 8-Bit 48MHz USB MCU 14KB Flash TSSOP-14 | Microchip
MPN: PIC16F1455-E/ST β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.74 | $1.74 |
| 10 | $1.56 | $15.60 |
| 100 | $1.32 | $132.00 |
| 500 | $1.18 | $590.00 |
| 1,000 | $1.05 | $1,050.00 |
| 3,000 | $0.95 | $2,850.00 |
PIC16F1455-E/ST Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (Flash for program, SRAM for data, EEPROM for non-volatile storage), and programmable I/O peripherals on one die. The PIC16F1455 belongs to the 8-bit PIC16 family (PIC16 -> 8-bit MCU -> microcontroller -> semiconductor), targeting cost-sensitive USB applications where an external transceiver is undesirable. Within Microchip's taxonomy it is part of the PIC16F145x enhanced mid-range series, sharing silicon with the PIC16F1454 and PIC16F1459 in different pin counts.
Key features include 14KB Flash program memory organized as 8K x 14 words, 1024 bytes SRAM, 128 bytes EEPROM, up to 12 I/O pins, USB 2.0 full-speed module with on-chip transceiver and clock recovery, an internal 48MHz oscillator accurate to within +/-0.25% across voltage and temperature, a 10-bit ADC with up to 9 channels, two 8-bit timers, one 16-bit timer, Enhanced PWM module, MSSP for SPI/I2C, and the eXtreme Low Power (XLP) sleep current of typically <50 nA.
The PIC16F1455 uses Microchip's enhanced mid-range core with a 14-bit instruction word. Peripherals are accessed through a peripheral pin-select (PPS) matrix, which remaps digital functions onto general-purpose I/O, simplifying PCB routing. The integrated USB 2.0 module supports full-speed (12 Mbps) device and limited-host/OTG modes with on-chip 3.3V internal regulator and D+/D- transceivers, eliminating the need for an external PHY.
Typical applications include USB-to-UART bridges, USB HID peripherals (keyboards, mice, custom input devices), low-cost USB sensor nodes, USB chargers with smart negotiation, and small consumer/industrial devices that need a USB interface without an external transceiver. The 14-pin TSSOP footprint also suits designs where board area is critical.
When designing with this device, confirm that the chosen application requires only up to 12 I/O pins since the TSSOP-14 package exposes limited GPIO. For designs needing more I/O, the PIC16F1459 in 20-pin packages is pin-compatible with the same firmware. Decoupling requires a 100nF ceramic capacitor close to VDD and a 4.7uF bulk capacitor on the USB VBUS rail if VBUS sensing is used.
This page synthesizes distributor pricing, drop-in package-compatible alternatives from the PIC16F145x family and Microchip portfolio, and practical design notes not collected in a single place in the manufacturer datasheet.
Drop-in alternatives for PIC16F1455-E/ST β 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 PIC16F1455-E/ST (same form factor and footprint) β differing in Internal Oscillator, Package, MSL Level, Mounting Type, Data EEPROM.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16F1454-E/ST
β Drop-Inπ Reference alternative (not in catalog)
PIC16F1455-I/ST
β Drop-Inβ In Stock
$1.31 / Unit
View Datasheet βPIC16F1454T-I/ST
β Drop-Inβ In Stock
$1.41 / Unit
View Datasheet βPIC16F1459-E/ST
β Drop-Inπ Reference alternative (not in catalog)
PIC16F1455-E/ST Maximum Ratings & Electrical Characteristics
| Core | PIC16 enhanced mid-range 8-bit RISC |
| Instruction Set | 49 instructions, 14-bit word |
| Stack Levels | 16 |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| Data SRAM | 1024 bytes |
| Data EEPROM | 128 bytes |
| Maximum Clock Speed | 48 MHz |
| Internal Oscillator | 48 MHz with PLL, +/-0.25% accuracy |
| USB Module | USB 2.0 full-speed device with on-chip transceiver and clock recovery |
| I/O Pins | Up to 12 (TSSOP-14) |
| ADC | 10-bit, up to 9 channels |
| Timers | 2 x 8-bit, 1 x 16-bit |
| PWM | Enhanced PWM (ECCP) module |
| Communication | MSSP (SPI / I2C), USB 2.0 FS |
| Operating Voltage | 2.3 V to 5.5 V |
| Operating Temperature | -40 C to +125 C (E suffix) |
| XLP Sleep Current | <50 nA typical |
| Package | 14-pin TSSOP (ST) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| MSL Level | 1 |
PIC16F1455-E/ST Pin Configuration
| Pin 1 | VDD β Positive supply voltage (2.3 V to 5.5 V) |
| Pin 2 | RA5 β GPIO / analog input / digital peripheral via PPS |
| Pin 3 | RA4 β GPIO / analog input / digital peripheral via PPS |
| Pin 4 | RA3/MCLR β GPIO or master clear (reset) input |
| Pin 5 | RA2 β GPIO / analog input / digital peripheral via PPS |
| Pin 6 | RA1/ICSPCLK β GPIO or ICSP clock programming pin |
| Pin 7 | RA0/ICSPDAT β GPIO or ICSP data programming pin |
| Pin 8 | VSS β Ground reference |
| Pin 9 | RA7/OSC1 β GPIO or crystal oscillator input |
| Pin 10 | RA6/OSC2 β GPIO or crystal oscillator output |
| Pin 11 | RC5/D+ β GPIO or USB D+ data line |
| Pin 12 | RC4/D- β GPIO or USB D- data line |
| Pin 13 | RC3 β GPIO / analog input / digital peripheral via PPS |
| Pin 14 | RC2 β GPIO / analog input / digital peripheral via PPS |
Typical Applications
PIC16F1455-E/ST is suitable for 6 applications: USB-to-UART Bridge, USB HID Peripheral, USB Smart Charger / Power Bank Controller, USB Sensor Node, USB LED Controller / Lighting Strip Interface, USB Bootloader / Programming Dongle.
USB-to-UART Bridge
The PIC16F1455-E/ST is well-suited as a USB-to-UART bridge because it integrates a USB 2.0 full-speed device controller with on-chip transceiver and clock recovery, eliminating the external PHY and crystal. At 48 MHz the core sustains up to 12 Mbps USB traffic while servicing the UART at common baud rates (9600 to 921600) through the MSSP or EUSART. The 14 KB Flash holds a CDC class driver plus custom protocol glue, and 1024 B SRAM buffers multi-byte packets without overflow. XLP sleep below 50 nA also lets the bridge wake on USB resume, an advantage for bus-powered accessories that must minimize suspend current.
Recommended
USB HID Peripheral
For USB HID input devices such as keyboards, mice, custom game controllers or industrial jog wheels, the PIC16F1455-E/ST provides the full-speed USB device, sufficient Flash for HID report descriptors and 12 GPIO for switch scanning. Its 48 MHz instruction rate supports debounce filtering and matrix scanning up to several kHz without taxing the CPU. The internal 48 MHz oscillator eliminates the BOM cost of an external crystal, which is critical for sub-$5 HID retail products. The TSSOP-14 footprint also keeps the PCB small enough to fit inside handheld form factors.
Recommended
USB Smart Charger / Power Bank Controller
The PIC16F1455-E/ST fits USB charger and small power bank designs where the MCU must negotiate USB BC 1.2 or vendor-specific handshakes. The on-chip ADC monitors VBUS, current sense and battery voltage across 10-bit resolution, while PWM drives a buck or boost stage. Native USB enables host-side telemetry reporting over CDC or vendor class without an extra bridge. The XLP sleep current below 50 nA extends shelf life when no load is attached. The 2.3 V to 5.5 V supply range also tolerates direct battery connection in single-cell Li-ion designs.
Recommended
USB Sensor Node
For low-cost USB-attached sensor nodes measuring temperature, humidity, gas or light, the PIC16F1455-E/ST combines an integrated USB interface with a 10-bit ADC and up to 9 analog channels. The 48 MHz core runs averaged ADC sampling and basic digital filtering in real time. Vendor-class USB reports keep the host-side driver simple, and the part's XLP sleep below 50 nA is valuable for intermittently-attached sensors. The TSSOP-14 package fits a thumb-sized sensor puck with a single USB connector and minimal external components.
Recommended
USB LED Controller / Lighting Strip Interface
The PIC16F1455-E/ST works as a USB-attached LED controller where the host sends color and brightness commands over CDC or vendor class, and the MCU drives WS2812B or APA102 addressable strips via the enhanced PWM or MSSP. The 14 KB Flash holds timing-critical bit-banging routines plus protocol glue, while 1024 B SRAM pipelines several frames of buffer data. At 48 MHz, refresh rates above 30 Hz are achievable on 60-LED strips. The XLP sleep also allows the controller to drop to near-zero current when the host suspends USB.
Recommended
USB Bootloader / Programming Dongle
The PIC16F1455-E/ST serves as a low-cost USB programmer or bootloader host for nearby PIC microcontrollers, using its integrated USB device and MSSP/SPI or I2C to bit-bang ICSP or I2C boot sequences. The 14 KB Flash can host a CDC command interpreter plus an ICSP state machine, leaving enough headroom for vendor extensions. Bus-powered operation from the USB VBUS rail simplifies enclosure design. The TSSOP-14 footprint keeps the dongle under 1 square centimeter, ideal for field-update accessories in industrial automation.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F1455-E/ST β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1454-E/ST | PIC16F1455-I/ST | PIC16F1454T-I/ST | PIC16F1459-E/ST |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TSSOP-14 (ST) | TSSOP-14 - same | TSSOP-14 - same | TSSOP-14 - same | TSSOP-14 / SSOP-20 / QFN-20 |
| Program Flash | 14 KB | 8 KB (-43%) | 14 KB (same) | 8 KB (-43%) | 14 KB (same) |
| SRAM | 1024 B | 1024 B (same) | 1024 B (same) | 1024 B (same) | 1024 B (same) |
| EEPROM | 128 B | 128 B (same) | 128 B (same) | 128 B (same) | 128 B (same) |
| Max Clock Speed | 48 MHz | 48 MHz (same) | 48 MHz (same) | 48 MHz (same) | 48 MHz (same) |
| USB Module | USB 2.0 FS device + on-chip transceiver | USB 2.0 FS device + on-chip transceiver (same) | USB 2.0 FS device + on-chip transceiver (same) | USB 2.0 FS device + on-chip transceiver (same) | USB 2.0 FS device + on-chip transceiver (same) |
| I/O Pins | 12 | 12 (same) | 12 (same) | 12 (same) | 18 (TSSOP-14 variant = 12) |
| Operating Temperature | -40 C to +125 C | -40 C to +125 C (same) | -40 C to +85 C (narrower) | -40 C to +85 C (narrower) | -40 C to +125 C (same) |
| Approx 1pc Price (USD, 2026-09-19) | 1.74 | 1.62 (approx) | 1.65 (approx) | 1.55 (approx, reel) | 1.92 (approx) |
Key Differentiators
- On-chip USB 2.0 full-speed transceiver with clock recovery (vs PIC16F1454-E/ST)
- Industrial +125 C operating temperature in the same TSSOP-14 footprint (vs PIC16F1455-I/ST)
- TSSOP-14 footprint with 12 GPIO and integrated USB (vs PIC16F1459-E/ST in SSOP-20)
Design Notes
Estimated: at VDD = 5 V and 48 MHz active, the PIC16F1455-E/ST draws roughly 8-9 mA. With the USB transceiver active, plan a VBUS-derived 5 V rail capable of delivering 100 mA (USB high-power) or 500 mA if the design enumerates as a high-power device. Place a 100 nF decoupling capacitor within 3 mm of pin 1 (VDD) and a 4.7 uF bulk capacitor on the USB VBUS rail if VBUS sensing is implemented. The internal USB 3.3 V LDO is derived from VDD, so a clean VDD minimizes USB signal-integrity issues.
Route the USB D+ and D- lines (RC5 and RC4) as a 90 ohm differential pair with length matching within 2 mm. Keep them away from switching nodes such as the PWM output and oscillator traces to minimize radiated EMI. The TSSOP-14 thermal pad is the underside slug; tie it to VSS with at least three via stitches to a ground pour for mechanical stability and EMI return.
Do not leave the MCLR pin (pin 4, RA3/MCLR) floating - it must be pulled up to VDD through a 10 kohm resistor, otherwise spurious resets will occur on noisy rails. The internal 48 MHz oscillator is accurate enough for full-speed USB, but for low-voltage or high-temperature designs verify timing on the bench. Finally, confirm the firmware image fits in 14 KB Flash when planning a USB stack plus application; the PIC16F1454 with only 8 KB is a common source of linker overflow errors.
Compliance Information
RoHS and REACH compliance per Microchip product page; not AEC-Q100 qualified - for automotive use consider PIC16F1455-E/ST qualified to industrial specifications only.