PIC16LF1458T-I/SS - 8-Bit USB MCU 7KB Flash 48MHz SSOP-20 | Microchip
MPN: PIC16LF1458T-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.95 | $1.95 |
| 10 | $1.78 | $17.80 |
| 100 | $1.55 | $155.00 |
| 500 | $1.38 | $690.00 |
| 1,000 | $1.22 | $1,220.00 |
PIC16LF1458T-I/SS Overview
An 8-bit microcontroller is a small computer-on-a-chip that executes instructions 8 bits at a time from on-chip flash memory; the PIC16 family from Microchip uses a RISC-based Harvard architecture with separate program and data buses. The 'LF' prefix denotes the lower-voltage, picoPower XLP variant optimized for battery-powered designs, while the F variant supports 2.3V to 5.5V. Within the broader taxonomy, a microcontroller belongs to the power management and embedded control IC family, sitting alongside DSPs, FPGAs, and analog signal-chain ICs.
Key features include integrated USB with on-chip transceiver and internal 3.3V regulator, 14KB of linear program memory address space (7KB Flash), hardware CWG for synchronous rectification and complementary outputs, and nanoWatt XLP technology for sub-microamp sleep modes. The device supports in-circuit serial programming (ICSP) via two pins, enabling firmware updates without removing the part from the board.
The architecture pairs a 14-bit instruction word with an 8-bit data path, providing predictable timing suitable for deterministic control loops. The 49 instruction set, two hardware stack levels, and direct/indirect addressing modes keep the code footprint compact. Internal 48 MHz oscillator accuracy supports USB full-speed signaling without an external crystal.
Typical applications include USB peripherals (HID, CDC, MIDI, custom classes), human-interface devices such as keyboards and mice, low-power sensor hubs, battery-powered IoT endpoints, and consumer accessories like game controllers. The integrated USB transceiver eliminates the need for an external PHY, reducing both BOM cost and PCB area.
When designing with this part, observe the 3.6V absolute maximum supply rating; USB bus-powered designs must use the internal 3.3V regulator or add external protection. For battery applications, leverage the nanoWatt XLP sleep modes (typically < 1 uA in sleep with WDT disabled) to maximize runtime from coin cells or Li-Po cells.
Drop-in alternatives for PIC16LF1458T-I/SS — 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 PIC16LF1458T-I/SS (same form factor and footprint) — differing in Package, I/O Pins, Program Memory (Flash), Core Architecture, Data SRAM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F1458T-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1459T-I/SS
✅ Drop-In✓ In Stock
$1.18 / Unit
View Datasheet →PIC16LF1455T-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1454T-I/SS
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC16LF1458-I/SS
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC16LF1455-I/SL
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.62 / Unit
View Datasheet →PIC16LF1458-E/SO
✅ Drop-In✓ In Stock
$1.16 / Unit
View Datasheet →PIC16LF1458T-I/SS Maximum Ratings & Electrical Characteristics
| Family | PIC16(L)F145x |
| Program Memory (Flash) | 7 KB (4K x 14 words) |
| Data SRAM | 512 bytes |
| Operating Voltage Range (LF) | 1.8 V to 3.6 V |
| Maximum CPU Speed | 48 MHz |
| I/O Pins | 18 |
| ADC | 10-bit, up to 9 channels |
| Comparators | 2 |
| DAC | 5-bit |
| Timers | 8-bit x 2, 16-bit x 1 |
| PWM Outputs | 10-bit PWM |
| EUSART | 1 |
| MSSP (I2C/SPI) | 1 |
| USB | USB 2.0 Full-Speed (12 Mbps) with on-chip transceiver |
| CWG (Complementary Waveform Generator) | 1 |
| Operating Temperature Range | -40 C to +85 C (Industrial, 'I' suffix) |
| Package | 20-pin SSOP (SS) |
| Mounting Type | Surface Mount |
| MSL Level | 1 (unlimited) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC16LF1458T-I/SS Pin Configuration
| Pin 1 | VDD — Positive supply voltage input |
| Pin 2 | RA5 — Digital I/O pin / analog input |
| Pin 3 | RA4 — Digital I/O pin |
| Pin 4 | RA3 — Digital I/O pin / MCLR |
| Pin 5 | RC5 — Digital I/O pin |
| Pin 6 | RC4 — Digital I/O pin |
| Pin 7 | RC3 — Digital I/O pin |
| Pin 8 | RC2 — Digital I/O pin |
| Pin 9 | RC1 — Digital I/O pin |
| Pin 10 | RC0 — Digital I/O pin |
| Pin 11 | RA0 — Digital I/O pin / analog input |
| Pin 12 | RA1 — Digital I/O pin / analog input |
| Pin 13 | RA2 — Digital I/O pin / analog input |
| Pin 14 | VSS — Ground reference |
| Pin 15 | RC6 — Digital I/O pin |
| Pin 16 | RC7 — Digital I/O pin / ICSPCLK |
| Pin 17 | RB7 — Digital I/O pin / ICSPDAT |
| Pin 18 | D+ — USB D+ data line |
| Pin 19 | D- — USB D- data line |
| Pin 20 | VUSB3V3 — USB 3.3V regulator output |
Typical Applications
PIC16LF1458T-I/SS is suitable for 6 applications: USB HID Peripherals, USB CDC Virtual COM Port Devices, Battery-Powered IoT Sensor Hubs, USB MIDI and Audio Control Surfaces, Industrial USB Data Acquisition Modules, Consumer USB Accessories (Chargers, Dongles).
USB HID Peripherals
The PIC16LF1458T-I/SS is well suited to USB HID class devices such as keyboards, mice, gamepads, and custom input peripherals. Its integrated USB 2.0 full-speed transceiver eliminates the external PHY, reducing BOM cost on space-constrained PCBs. The 7 KB flash is sufficient for HID report descriptors plus application state machines, while the 48 MHz internal oscillator meets USB full-speed timing accuracy without a crystal. Combined with XLP sleep below 1 uA, the part enables battery-powered HID devices on a single coin cell for months of runtime.
Recommended
USB CDC Virtual COM Port Devices
CDC-class USB devices implementing a virtual COM port can be built on the PIC16LF1458T-I/SS using the integrated USB transceiver and internal 3.3V regulator. The 512-byte SRAM accommodates USB endpoint buffers plus UART line buffers, while the MSSP and EUSART peripherals handle serial framing. Designers typically allocate 3 KB of the 7 KB flash to the CDC class driver and the remainder to the application. The wide 1.8V to 3.6V supply range simplifies bus-powered designs running directly from USB VBUS through an internal regulator.
Recommended
Battery-Powered IoT Sensor Hubs
The PIC16LF1458T-I/SS supports low-duty-cycle IoT sensor hubs operating from coin cells or Li-Po batteries. Its XLP nanoWatt technology delivers sub-1-uA sleep current with Watchdog Timer disabled, allowing multi-year battery life when the MCU wakes briefly to read sensors and transmit. The 10-bit ADC (up to 9 channels) handles temperature, light, or analog sensor inputs; the 5-bit DAC provides analog outputs for sensor biasing. The CWG (Complementary Waveform Generator) can drive a low-power piezo buzzer or haptic actuator on demand.
Recommended
USB MIDI and Audio Control Surfaces
MIDI controllers and audio control surfaces benefit from the PIC16LF1458T-I/SS USB integration and PWM channels for LED dimming. Each rotary encoder or button matrix can be scanned using the CWG and timers; PWM outputs drive LED rings with 10-bit resolution. USB full-speed bulk transfers move MIDI messages at standard 31250 baud equivalent rates without bottlenecks. With 7 KB flash, the device holds a complete USB MIDI descriptor plus the application logic for 8 to 16 channel control surfaces.
Recommended
Industrial USB Data Acquisition Modules
Industrial data acquisition modules with USB connectivity can use the PIC16LF1458T-I/SS as the main controller, leveraging its 10-bit ADC and comparators. The industrial temperature grade (-40 C to +85 C) matches factory-floor environmental requirements. The MSSP peripheral supports external SPI ADC or I2C sensor expansion, while the EUSART provides an RS-232 or RS-485 option through an external transceiver. Designers use the CWG to generate precision timing signals for sensor excitation or synchronous sampling.
Recommended
Consumer USB Accessories (Chargers, Dongles)
USB charging indicators, security dongles, and simple consumer accessories can be implemented on the PIC16LF1458T-I/SS for low BOM cost. The integrated 3.3V regulator powers the MCU and a few external LEDs from USB VBUS without auxiliary LDO. The 18 I/O pins accommodate LEDs, buttons, and I2C peripherals such as authentication EEPROMs. With XLP sleep below 1 uA, the dongle draws negligible current from the host port when idle, easing compliance with USB suspend current requirements.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF1458T-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1458T-I/SS | PIC16LF1459T-I/SS | PIC16LF1455T-I/SS | PIC16LF1458-E/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SSOP-20 (SS) | SSOP-20 (SS) - same | SSOP-20 (SS) - same | SSOP-20 (SS) - same | SSOP-20 (SS) - same |
| Operating Voltage Range | 1.8 V to 3.6 V (LF) | 2.3 V to 5.5 V (F) | 1.8 V to 3.6 V (LF) | 1.8 V to 3.6 V (LF) | 1.8 V to 3.6 V (LF) |
| Flash Program Memory | 7 KB | 7 KB | 14 KB | 14 KB | 7 KB |
| Data SRAM | 512 bytes | 512 bytes | 1024 bytes | 1024 bytes | 512 bytes |
| Maximum CPU Speed | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| USB 2.0 Full-Speed | Integrated transceiver | Integrated transceiver | Integrated transceiver | Integrated transceiver | Integrated transceiver |
| XLP (Sub-1-uA Sleep) | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature Grade | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +125 C (Extended) |
Key Differentiators
- Lowest voltage XLP variant in the SSOP-20 footprint (vs PIC16F1458T-I/SS)
- Smaller flash footprint with identical USB integration (vs PIC16LF1459T-I/SS)
- Industrial temperature grade matched to USB accessory use (vs PIC16LF1458-E/SO)
- USB suspend current compliance from XLP technology (vs PIC16LF1455T-I/SS)
Design Notes
Estimated: When USB bus-powered at 5V VBUS, enable the internal 3.3V regulator and decouple VUSB3V3 with 1 uF ceramic plus 0.1 uF high-frequency bypass. For 3.3V-only systems, leave the regulator disabled and connect VUSB3V3 directly to VDD. The internal 3.3V regulator can source up to 100 mA; total MCU plus external load current must stay below this rating with margin for USB suspend.
USB D+ and D- traces must be 90-ohm differential impedance matched, with length matching to within 2 mm. Keep the D+/D- pair away from switching nodes and oscillators. Place the 27-ohm series termination resistors close to the MCU pins. A common-mode choke is recommended for ESD-sensitive or industrial environments.
Place decoupling capacitors (100 nF plus 1 uF bulk) within 5 mm of the VDD pin and the VUSB3V3 pin. Provide a ground plane under the SSOP-20 footprint for thermal dissipation and signal integrity. For ICSP programming, expose the ICSPCLK and ICSPDAT pins to a header or test pad for factory firmware load.
Do not exceed 3.6V on any pin on the LF variant; the F variant tolerates higher voltages only on specific pins per datasheet note. The internal 48 MHz oscillator requires the proper configuration word to enable USB operation; default HFINTOSC settings may not meet USB full-speed accuracy. Always program the PLL configuration correctly for 48 MHz USB clock generation.
At typical 3.3V operation, the PIC16LF1458T-I/SS active current is approximately 8 mA at 48 MHz. The SSOP-20 package has theta_JA around 90 C/W, yielding a junction temperature rise of roughly 1 C per mA of dissipation. At full 48 MHz active the die stays well within thermal limits; in sleep mode current drops to sub-1-uA and thermal considerations become negligible.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified; automotive applications should consult Microchip automotive-grade part listings. Halogen-free status not explicitly stated in provided data.
