PIC16F1458-I/P - 8-Bit USB MCU, 7KB Flash, 20-PDIP | Microchip
MPN: PIC16F1458-I/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.5 | $2.50 |
| 10 | $2.34 | $23.40 |
| 100 | $2.05 | $205.00 |
| 500 | $1.78 | $890.00 |
| 1,000 | $1.55 | $1,550.00 |
PIC16F1458-I/P Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, working RAM, non-volatile data EEPROM, and programmable peripherals. PIC microcontrollers use a modified Harvard RISC architecture with a 14-bit instruction word and a separate data bus; they sit at the bottom tier of the embedded computing hierarchy (MCU -> 8-bit microcontroller -> embedded processor) and are deployed wherever deterministic control of simple peripherals (buttons, LEDs, sensors, USB) is needed. The 8-bit core remains popular because it costs less per IO than 32-bit Cortex-M parts and consumes far less active current.
Key features of the PIC16F1458 include 7KB Flash, 512 bytes RAM, 256 bytes EEPROM, a 48 MHz internal oscillator with 4x PLL producing the 48 MHz USB clock, a 10-bit ADC up to 100 ksps, two comparators, PWM, I2C/SPI/EUSART, and the integrated USB 2.0 full-speed transceiver. It also adds a 5-bit DAC for USB termination, an on-chip voltage regulator (3.3V) that powers the internal USB transceiver from a 5V bus, and the XLP nanower sleep current rating.
USB integration is the defining architectural feature. The 48 MHz system clock is generated from the 16 MHz HFINTOSC and the 3x PLL, which the USB SIE requires. The transceiver includes internal pull-up resistors and 1.5 kΩ pull-up is configurable in firmware, so no external USB pull-up is required. Because the device can self-power the transceiver from VBUS (5V) and present itself as either a bus-powered HID, CDC, or custom endpoint, the BOM for a small USB peripheral shrinks to a connector, two bypass caps, and the MCU.
Typical applications include USB HID peripherals (keyboards, mice, custom input devices), USB-to-UART bridges, USB MIDI controllers, low-cost data loggers, sensor-to-USB adapters, battery-powered instruments, and industrial control nodes. The 20-pin PDIP package is breadboard-friendly and well suited to prototyping, hobbyist designs, and low-volume through-hole assemblies where socketed replacement is desirable.
When designing with this part, ensure VBUS is connected to pin 14 so the internal USB 3.3V regulator can bias the transceiver, and add 0.1 uF ceramic bypass on VDD and VUSB. The 48 MHz system clock requires PLL configuration after every Fosc startup and is required for any USB transaction. Do not exceed 5.5V on VDD or apply VBUS before VDD.
This page synthesizes distributor pricing for 20-PDIP stock, same-package PIC16F family drop-in alternatives, and practical design notes not aggregated on any single datasheet page.
Drop-in alternatives for PIC16F1458-I/P — 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 PIC16F1458-I/P (same form factor and footprint) — differing in ADC, Package, Mounting Type, Core Architecture, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F1454-I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F1455-I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F1459-I/P
✅ Drop-In✓ In Stock
$2.16 / Unit
View Datasheet →PIC16F1454-E/P
✅ Drop-In✓ In Stock
$1.32 / Unit
View Datasheet →PIC16F1458-I/P Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC (Harvard) |
| Program Memory | 7 KB (4K x 14) Flash |
| Data RAM | 512 bytes |
| Data EEPROM | 256 bytes |
| Maximum CPU Frequency | 48 MHz |
| Operating Voltage Range | 2.4 V to 5.5 V |
| USB Interface | USB 2.0 Full-Speed (12 Mbps) Device |
| I/O Pins | 17 |
| ADC | 10-bit, up to 9 channels, 100 ksps |
| DAC | 5-bit |
| Comparators | 2 |
| PWM Modules | Yes (CCP/ECCP) |
| Communication | I2C, SPI, EUSART |
| Timers | Timer0, Timer1, Timer2 |
| Package | 20-pin PDIP (0.300 inch / 7.62 mm) |
| Mounting Type | Through-Hole |
| Operating Temperature | -40 C to +85 C (Industrial) |
| MSL Level | 1 (not moisture sensitive) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC16F1458-I/P 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 — Digital I/O / MCLR |
| Pin 5 | RC5 — Digital I/O |
| Pin 6 | RC4 — Digital I/O |
| Pin 7 | RC3 — Digital I/O |
| Pin 8 | RC6 — Digital I/O |
| Pin 9 | RC7 — Digital I/O |
| Pin 10 | RB7 — Digital I/O |
| Pin 11 | RB6 — Digital I/O |
| Pin 12 | RB5 — Digital I/O |
| Pin 13 | RB4 — Digital I/O |
| Pin 14 | VUSB — USB 3.3V regulator output / VBUS sense |
| Pin 15 | D- — USB D- data line |
| Pin 16 | D+ — USB D+ data line |
| Pin 17 | RC0 — Digital I/O |
| Pin 18 | RC1 — Digital I/O |
| Pin 19 | RC2 — Digital I/O |
| Pin 20 | VSS — Ground reference |
Typical Applications
PIC16F1458-I/P is suitable for 6 applications: USB HID Peripheral (Keyboard/Mouse/Custom HID), USB-to-UART Bridge / CDC Virtual COM Port, USB MIDI Controller, Battery-Powered Sensor-to-USB Adapter, Industrial Control Node / Data Logger, Hobbyist / Educational USB Development Platform.
USB HID Peripheral (Keyboard/Mouse/Custom HID)
The PIC16F1458-I/P is purpose-built for USB Human Interface Device peripherals thanks to its integrated USB 2.0 full-speed transceiver and 48 MHz system clock. With 7 KB of Flash and Microchip's free HID class stack, the MCU enumerates as a HID keyboard, mouse, game controller, or custom input device without an external transceiver, BOM cost held to two bypass caps and a USB connector.
Recommended
USB-to-UART Bridge / CDC Virtual COM Port
The integrated USB SIE and on-chip 3.3 V regulator make the PIC16F1458-I/P a drop-in solution for USB-to-UART bridges via the CDC class. The 48 MHz core sustains 115200 baud and higher with full hardware flow control on EUSART, while 7 KB of Flash hosts Microchip's CDC stack with user command parser. Typical designs add only a USB connector and bypass capacitors to the BOM.
Recommended
USB MIDI Controller
MIDI controllers require USB Full-Speed bulk or interrupt endpoints and deterministic timing - both delivered by the PIC16F1458-I/P. The 7 KB Flash holds a MIDI class descriptor plus button/encoder scanning code, while the on-chip comparators and ADC read analog controls without external components. The XLP sleep mode below 1 uA suits battery-powered floor controllers.
Recommended
Battery-Powered Sensor-to-USB Adapter
The PIC16F1458-I/P is ideal for sensor-to-USB adapters that draw from coin cells or Li-ion batteries. XLP nanower sleep mode drops quiescent current below 1 uA between USB enumerations, while the 10-bit ADC and I2C/SPI peripherals read most low-bandwidth sensors. The internal 3.3 V regulator from VBUS allows the device to power itself from USB and run sensors from the same rail.
Recommended
Industrial Control Node / Data Logger
The 20-pin PDIP package, 2.4-5.5 V supply range, and 256-byte EEPROM make the PIC16F1458-I/P a strong fit for industrial control nodes with USB diagnostics. The PIC16F1454-E/P (-40 C to +125 C extended) shares the same footprint and USB capability for harsher enclosures. On-chip EEPROM retains calibration data across power cycles without external storage.
Recommended
Hobbyist / Educational USB Development Platform
The 20-pin PDIP variant is breadboard-friendly and supported by Microchip's Curiosity development platform and MPLAB X IDE with free C compiler. Hobbyists and educators can prototype USB peripherals, MIDI controllers, and sensor adapters without external programmers thanks to the on-chip debug. The 7 KB Flash covers typical class-compliant USB firmware with room to spare.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F1458-I/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1454-I/P | PIC16F1455-I/P | PIC16F1459-I/P | PIC16F1454-E/P |
|---|---|---|---|---|---|
| Package | 20-PDIP | 20-PDIP - same | 20-PDIP - same | 20-PDIP - same | 20-PDIP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Flash | 7 KB (4K x 14) | 7 KB | 14 KB | 14 KB | 7 KB |
| Data RAM | 512 bytes | 512 bytes | 1024 bytes | 1024 bytes | 512 bytes |
| Maximum CPU Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| USB 2.0 Full-Speed | Yes (integrated) | Yes | Yes | Yes | Yes |
| Operating Voltage | 2.4 V to 5.5 V | 2.4 V to 5.5 V | 2.4 V to 5.5 V | 2.4 V to 5.5 V | 2.4 V to 5.5 V |
| Temperature Grade | -40 C to +85 C (Industrial) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C (Extended) |
| Unit Price @ 100 pcs (approx) | $2.05 | $1.95 | $2.15 | $2.25 | $2.20 |
Key Differentiators
- Highest Flash memory in 20-PDIP for USB-only PIC16F sub-family (vs PIC16F1454-I/P)
- Lower cost than 14 KB sibling on identical footprint (vs PIC16F1455-I/P)
- Industrial temperature range standard on -I/P suffix (vs PIC16F1454-E/P)
Design Notes
The PIC16F1458-I/P integrates a 3.3 V LDO on the VUSB pin that powers the USB transceiver from a 5 V VBUS rail. Tie VBUS through the internal regulator to VUSB, then add 0.1 uF and 10 uF ceramics close to pin 14. The MCU core remains on VDD (2.4-5.5 V); the VUSB rail must not be loaded externally as it is sized only for the transceiver.
USB Full-Speed requires a 48 MHz system clock with 0.25% accuracy, derived from the 16 MHz HFINTOSC + 3x PLL. Configure the active clock source and PLL via OSCCON before enabling the USB module. The 31 kHz LFINTOSC supports XLP sleep but cannot be used for USB transactions; expect PLL relock latency after waking from sleep.
Place 0.1 uF and 10 uF bypass capacitors within 5 mm of VDD (pin 1) and VSS (pin 20). Keep USB D+/D- traces short, matched in length, and routed as a 90-ohm differential pair per USB 2.0 specification. Avoid running digital signals across the D+/D- pair to minimize EMI coupling into the USB data path.
Common pitfalls: (1) Forgetting to enable the 3x PLL before USB module configuration; (2) Leaving the internal USB pull-up disabled, causing enumeration failure on host ports; (3) Drawing more than 8 mA from VUSB (the internal regulator is sized only for the transceiver, not for external loads); (4) Failing to set the CONFIG words for HS or XT oscillator when using an external crystal.
Compliance Information
RoHS and REACH compliant per Microchip product page. Industrial temperature grade only - choose -E suffix variants for AEC-Q100-style extended temperature operation.
