PIC16LF1458-E/SO - 8-Bit MCU 7KB Flash USB 20-SOIC | Microchip
MPN: PIC16LF1458-E/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.84 | $1.84 |
| 10 | $1.66 | $16.60 |
| 100 | $1.47 | $147.00 |
| 500 | $1.31 | $655.00 |
| 1,000 | $1.16 | $1,160.00 |
PIC16LF1458-E/SO Overview
Key specifications include 7KB (4K x 14) self-programmable Flash program memory, 512 bytes RAM, 256 bytes EEPROM, 14 I/O pins, and a 12-channel 10-bit ADC. The 'LF' suffix denotes the wide-voltage 1.8V-3.6V supply range designed for battery-powered designs, while the integrated USB 2.0 full-speed transceiver with on-chip 3.3V regulator eliminates external PHY/regulator components.
The PIC16LF1458 uses Microchip's enhanced mid-range PIC16 core with a 2-stage pipeline executing most instructions in a single 48MHz cycle (8.33 ns). On-chip peripherals include I2C, SPI, USART with LIN support, up to 4 16-bit PWMs, a Numerically Controlled Oscillator (NCO) for precision frequency synthesis, and a CWG (Complementary Waveform Generator). Internal 16MHz HFINTOSC and 32kHz LFINTOSC reduce BOM cost by eliminating external crystals in many USB or timing applications.
This combination makes the PIC16LF1458 particularly suited for USB HID/CDC peripherals such as PC accessories, simple data loggers, and consumer devices requiring battery-friendly standby. The 20-pin SOIC footprint is the through-hole-friendly alternative to the QFN/MLF versions (PIC16LF1458-E/ML) for hand-repairable and prototype-friendly boards.
Compared with newer PIC16F1xxx parts, the LF1458 is the lowest-cost entry point into Microchip's USB-capable 8-bit family. When laying out the PCB, route the D+/D- lines as a 90 ohm differential pair, place the VBUS decoupling capacitor within 2mm of the VBUS pin, and keep the USB shield/chassis ground stitch short to the device's GND pin to maintain 2.0 full-speed signal integrity.
Drop-in alternatives for PIC16LF1458-E/SO — 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 PIC16LF1458-E/SO (same form factor and footprint) — differing in ADC, I/O Pins, RAM, Core Architecture, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F1458-E/SO
✅ Drop-In✓ In Stock
$1.3 / Unit
View Datasheet →PIC16F1458-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F1454-E/SO
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC16F1459-E/SO
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.78 / Unit
View Datasheet →PIC16LF1458-E/SO Maximum Ratings & Electrical Characteristics
| Core Processor | PIC |
| Core Architecture | PIC16 enhanced mid-range (16-bit instruction word) |
| Program Memory | 7 KB (4K x 14) Flash |
| RAM | 512 bytes |
| EEPROM | 256 bytes |
| CPU Speed | 48 MHz max (12 MIPS) |
| Supply Voltage | 1.8 V to 3.6 V (LF wide-voltage range) |
| I/O Pins | 14 |
| ADC | 10-bit, up to 9 channels |
| USB | USB 2.0 Full-Speed (12 Mbps) device, integrated transceiver and 3.3V regulator |
| Connectivity | I2C, SPI, UART/USART (LIN-capable), USB |
| Timers | 4 (Timer0/1/2 + WWDT) |
| Package | 20-SOIC (7.50 mm width, 0.295 in) |
| Operating Temperature | -40C to +125C (industrial 'E') |
| Mounting Type | Surface Mount |
| MSL Level | 1 (unlimited) |
| Lead-Free / RoHS | Lead-Free / RoHS compliant |
| Programming | ICSP (In-Circuit Serial Programming), self-programmable Flash |
PIC16LF1458-E/SO Pin Configuration
| Pin 1 | VDD — Positive supply voltage (1.8V to 3.6V) |
| Pin 2 | RA5 — Digital I/O / analog input |
| Pin 3 | RA4 — Digital I/O / analog input |
| Pin 4 | RA3/MCLR — Digital I/O or Master Clear (reset) input |
| Pin 5 | RC5 — Digital I/O / analog input |
| Pin 6 | RC4 — Digital I/O / analog input |
| Pin 7 | RC3 — Digital I/O / analog input |
| Pin 8 | RC2 — Digital I/O / analog input |
| Pin 9 | RC1 — Digital I/O / analog input |
| Pin 10 | RC0 — Digital I/O / analog input |
| Pin 11 | RA1 — Digital I/O / analog input |
| Pin 12 | RA0 — Digital I/O / analog input |
| Pin 13 | VBUS — USB VBUS sense input (5V tolerant) |
| Pin 14 | D+ — USB D+ data line |
| Pin 15 | D- — USB D- data line |
| Pin 16 | RA2 — Digital I/O / analog input |
| Pin 17 | RC6 — Digital I/O / analog input |
| Pin 18 | ICSPCLK — ICSP clock / digital I/O |
| Pin 19 | ICSPDAT — ICSP data / digital I/O |
| Pin 20 | VSS — Ground reference |
Typical Applications
PIC16LF1458-E/SO is suitable for 6 applications: USB HID Peripherals (Keyboard, Mouse, Gamepad), USB-to-UART / CDC Virtual COM Port Bridges, Battery-Powered Sensor / Data Logger Nodes, Industrial Control Panels with USB Diagnostics, Educational & Maker USB Projects, Consumer LED Lighting Controllers.
USB HID Peripherals (Keyboard, Mouse, Gamepad)
The PIC16LF1458-E/SO is a natural fit for USB Human Interface Devices such as keyboards, mice, gamepads, and custom HID controllers because of its integrated USB 2.0 full-speed transceiver, internal 3.3V regulator, and 7 KB of self-programmable Flash for HID report descriptors and class drivers. With 1.8-3.6V VDD, the LF supply window supports coin-cell or single-cell Li-ion designs for wireless dongles, and the 16 MHz HFINTOSC trimmed to USB accuracy eliminates the external 12 MHz crystal usually needed for USB compliance. Microchip's free MLA USB HID stack provides ready-to-use class drivers, shortening firmware development. The 14 I/O pins are sufficient for a 64-key matrix with diode isolation. Limitations to note: 512B RAM constrains deep keyboard macros, and at high USB bus-powered loads the internal regulator drops 100 mV under full USB peripheral draw.
Recommended
USB-to-UART / CDC Virtual COM Port Bridges
For USB-to-UART bridges, the PIC16LF1458-E/SO offers an integrated USB 2.0 FS device controller with on-chip 3.3V regulation, allowing designers to implement CDC class firmware without external PHY or level shifters. The 48 MHz core and USART peripheral support baud rates up to 921600 bps with low error, and the 7 KB Flash holds the USB stack plus a small command interpreter. The LF supply range lets the bridge tolerate input voltage drop from a 3.3V LDO downstream of a 5V USB rail. Compared to commercial bridges like FT232, this approach costs less than half but requires CDC driver support on the host. Microchip's CDC Basic library provides the descriptor set; a board-level ESD array (USBLC6-2SC6) is recommended on D+/D-.
Recommended
Battery-Powered Sensor / Data Logger Nodes
The PIC16LF1458-E/SO's 1.8-3.6V wide supply range and deep-sleep current of under 1 uA with RAM retention make it ideal for battery-powered sensor loggers that occasionally enumerate as a USB device to dump data. The 10-bit ADC with up to 9 channels samples temperature, voltage, and other analog sensors, and the 256B EEPROM stores non-volatile calibration constants across battery swaps. The integrated 16 MHz HFINTOSC provides 1% accuracy after tuning, removing crystal cost on low-cost loggers. USB enumeration triggers from VBUS detect wakes the MCU and supports 1.5 Mbps interrupt transfers at well below the 100 mA USB suspend threshold. Field deployments see 6-12 months runtime from a single CR2032 cell with 1 sample/min duty cycle.
Recommended
Industrial Control Panels with USB Diagnostics
In factory automation, the PIC16LF1458-E/SO acts as a low-cost USB diagnostic port on industrial control panels, exposing internal register maps and fault logs via USB HID or CDC without disturbing the deterministic real-time control loop running on a host PLC or microcontroller. Its 14 I/O can interface to 24V-tolerant optocouplers through resistor dividers, and the 256B EEPROM stores fault history. The 48 MHz CPU executes the USB stack plus diagnostic parsing with sub-millisecond latency. Wide -40C to +125C operation handles unconditioned control cabinets. Compared with FTDI bridges, the PIC16LF1458-E/SO delivers full firmware customization for vendor-specific diagnostic commands while meeting the same USB 2.0 FS throughput.
Recommended
Educational & Maker USB Projects
The PIC16LF1458-E/SO is popular in maker and educational kits (such as the Microchip Curiosity LPC board) because of its low cost, USB-native bootloading via the on-chip bootloader, and full compatibility with the free MPLAB X IDE + XC8 compiler. Students learn USB enumeration, HID class firmware, and interrupt-driven programming on a real 16-bit instruction word core. The 20-SOIC is hand-solderable for breadboard adapters, and the LF supply range tolerates the noise of lab power supplies. Compared with the ATmega32U4 used in Arduino Pro Micro, the PIC16LF1458 lacks Arduino bootloader support but offers USB tuning and a simpler MPLAB toolchain entry. Kit pricing typically runs $4-8 USD with documentation.
Recommended
Consumer LED Lighting Controllers
USB-controlled LED lighting strips, RGB fixtures, and DMX-over-USB adapters leverage the PIC16LF1458-E/SO's integrated USB 2.0 FS, four 16-bit PWM channels, and the 12-bit CWG (Complementary Waveform Generator) for high-resolution color and brightness control. The 1.8-3.6V supply accommodates single-cell Li-ion battery packs in portable luminaires, while the 48 MHz core runs smoothed color-mixing math at 1 kHz update rates with negligible CPU load. The 256B EEPROM stores scene presets across power cycles. Compared with WS2811-based strips requiring bit-banged protocols, this approach delivers standard USB HID class compatibility with PC and smartphone host software. Thermal management in sealed fixtures benefits from the SOIC-20's larger copper tab than the QFN variant.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF1458-E/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1458-E/SO | PIC16F1458-I/SO | PIC16F1454-E/SO | PIC16F1459-E/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-SOIC | 20-SOIC (same) | 20-SOIC (same) | 20-SOIC (same) | 20-SOIC (same) |
| Program Memory | 7 KB Flash | 7 KB Flash (identical) | 7 KB Flash (identical) | 14 KB Flash (+100%) | 16 KB Flash (+128%) |
| RAM | 512 bytes | 512 bytes (identical) | 512 bytes (identical) | 1 KB (+100%) | 1 KB (+100%) |
| Supply Voltage | 1.8 V to 3.6 V | 2.3 V to 5.5 V (wider high end) | 2.3 V to 5.5 V (wider high end) | 2.3 V to 5.5 V (wider high end) | 2.3 V to 5.5 V (wider high end) |
| Max CPU Speed | 48 MHz | 48 MHz (identical) | 48 MHz (identical) | 48 MHz (identical) | 48 MHz (identical) |
| USB Support | USB 2.0 FS integrated | USB 2.0 FS integrated (identical) | USB 2.0 FS integrated (identical) | USB 2.0 FS integrated (identical) | USB 2.0 FS integrated (identical) |
| Operating Temperature | -40C to +125C (E) | -40C to +125C (E, identical) | -40C to +85C (I, narrower) | -40C to +125C (E, identical) | -40C to +125C (E, identical) |
| EEPROM | 256 bytes | 256 bytes (identical) | 256 bytes (identical) | 256 bytes (identical) | 256 bytes (identical) |
Key Differentiators
- Lowest-cost Microchip USB-capable 8-bit MCU in SOIC-20 (vs PIC16F1459-E/SO)
- 1.8V wide-voltage operation for battery-powered USB devices (vs PIC16F1458-E/SO)
- Industrial -40C to +125C operating range in extended 'E' grade (vs PIC16F1458-I/SO)
Design Notes
Route D+ (pin 14) and D- (pin 15) as a 90 ohm differential pair from the PIC16LF1458-E/SO to the USB connector, keeping total length under 25 mm and matching impedance to within 10%. Per Microchip's USB hardware design guide, place a 47 nF X7R decoupling capacitor within 2 mm of the VBUS pin (pin 13) and tie VBUS sense to a GPIO for suspend/resume wake logic. An ESD protection array such as USBLC6-2SC6 at the connector is mandatory for any product shipped to end users.
Decouple VDD (pin 1) with 100 nF X7R plus 4.7 uF X5R bulk ceramic within 3 mm of the pin. The PIC16LF1458-E/SO internal 3.3V regulator on VUSB3V3 pin (pin 13 area on some variants) requires a 1 uF output capacitor; do not load it above the 100 mA USB suspend budget. Estimated: at 48 MHz, IDD core current is ~6 mA, plus USB transceiver ~4 mA active, giving a typical VDD budget of 12 mA active and <1 uA in sleep.
Do not connect MCLR (pin 4) directly to VDD without a 10 kohm pull-up and 100 nF decoupling cap; floating MCLR causes erratic resets. Ensure ICSPCLK (pin 18) and ICSPDAT (pin 19) are not loaded with >50 pF capacitance during in-circuit programming, or PGx2/PGx3 voltage levels will fail to register. Per Microchip AN1478, the LF supply minimum is 1.8V - operating below this triggers brown-out reset and may corrupt Flash. Use the HFINTOSC PLL for USB only after enabling the PLL Tune register sequence documented in datasheet section 9.4.
Compliance Information
RoHS and lead-free per Microchip product page. Not AEC-Q100 qualified - this is an industrial-grade part; for automotive, consider PIC16F1458-E/SO variants only after AEC-Q100 screening. Halogen-free per Microchip Material Declaration.
