PIC16F1458-I/SS - 8-bit MCU, 7KB Flash, USB, 20-SSOP | Microchip
MPN: PIC16F1458-I/SS β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.45 | $2.45 |
| 10 | $2.18 | $21.80 |
| 100 | $1.85 | $185.00 |
| 500 | $1.62 | $810.00 |
| 1,000 | $1.41 | $1,410.00 |
PIC16F1458-I/SS Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash/ROM), working memory (RAM), and peripheral interfaces such as GPIO, timers, ADC, and communication buses. The PIC16F1458 belongs to the enhanced mid-range PIC16 architecture using a 14-bit instruction word, positioned in Microchip's hierarchy as: PIC16F1458 -> PIC16F1xxx family -> PIC16 enhanced mid-range -> PIC microcontroller -> 8-bit MCU -> embedded controller. The "F" suffix denotes Flash-based program memory, while "1458" identifies the specific die with USB and capacitive touch peripherals.
Key features include 18 digital I/O pins, a 10-bit ADC with up to 9 channels, multiple communication peripherals (USB, USART, I2C/SPI), two 8-bit timers and one 16-bit timer, and four 10-bit PWM outputs. The device operates from 2.5V to 5.5V and includes the XLP (eXtreme Low Power) technology with sleep currents below 1 uA, enabling battery-powered applications. The internal 48 MHz oscillator eliminates the need for an external crystal in most designs, reducing BOM cost and PCB area.
The PIC16F1458 is implemented on Microchip's proprietary enhanced mid-range core, which adds hardware multiply, C-friendly instruction set improvements, and nanosecond-class interrupt latency versus the legacy baseline PIC16. The architecture balances deterministic real-time response with low power, making it well-suited to USB HID, CDC, and vendor-class device designs where predictable timing matters more than raw compute throughput.
Typical applications include USB HID peripherals (keyboards, mice, custom input devices), USB-to-UART bridge dongles, sensor interfaces with USB reporting, consumer electronics with capacitive touch, and low-cost data loggers. Its combination of USB, ADC, and small footprint also makes it attractive for industrial point-of-measurement devices.
Designers should note that the 20-pin SSOP package has a 0.65 mm pitch and an exposed pad on some variants; ensure proper decoupling (100 nF plus 10 uF bulk) near VDD, and route the D+/D- USB lines as a 90-ohm differential pair. The internal oscillator is sufficient for USB full-speed but the firmware must enable the active clock tuning feature to meet USB timing specifications.
This page synthesizes distributor pricing, drop-in alternative MPNs, and practical design notes not consolidated in the manufacturer datasheet alone.
Drop-in alternatives for PIC16F1458-I/SS 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 PIC16F1458-I/SS (same form factor and footprint) β differing in ADC, Data RAM, Internal Oscillator, Operating Voltage, Package.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16F1455-I/SS
β Drop-Inπ Reference alternative (not in catalog)
PIC16F1459-I/SS
β Drop-Inβ In Stock
$1.55 / Unit
View Datasheet βPIC16F1458T-I/SS
β Drop-Inπ Reference alternative (not in catalog)
PIC16F1458-E/SS
β Drop-Inπ Reference alternative (not in catalog)
PIC16F1458-I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16 enhanced mid-range (14-bit instruction word) |
| Program Memory (Flash) | 7 KB |
| Data RAM | 512 bytes |
| Maximum CPU Frequency | 48 MHz |
| Operating Voltage | 2.5 V to 5.5 V |
| Digital I/O Pins | 18 |
| ADC | 10-bit, 9-channel |
| Timers | 2 x 8-bit, 1 x 16-bit |
| PWM Outputs | 4 x 10-bit |
| Communication | USB 2.0 Full-Speed, USART, I2C, SPI |
| USB | USB 2.0 Full-Speed Device |
| Internal Oscillator | 48 MHz (with USB active clock tuning) |
| Package | 20-pin SSOP (0.209", 5.30 mm width) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (industrial grade) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC16F1458-I/SS Pin Configuration
| Pin 1 | VDD β Positive supply voltage |
| Pin 2 | RA5 β Digital I/O / ADC channel |
| Pin 3 | RA4 β Digital I/O / ADC channel |
| Pin 4 | RA3/MCLR β Digital I/O / Master Clear (reset) |
| Pin 5 | RC5 β Digital I/O / PWM output |
| Pin 6 | RC4 β Digital I/O / PWM output |
| Pin 7 | RC3/AN7 β Digital I/O / ADC channel 7 |
| Pin 8 | RC2/AN6 β Digital I/O / ADC channel 6 |
| Pin 9 | RC1/AN5 β Digital I/O / ADC channel 5 |
| Pin 10 | RC0/AN4 β Digital I/O / ADC channel 4 |
| Pin 11 | RA1/ICSPCLK β Digital I/O / ICSP clock |
| Pin 12 | RA0/ICSPDAT β Digital I/O / ICSP data |
| Pin 13 | VSS β Ground reference |
| Pin 14 | RA2 β Digital I/O |
| Pin 15 | RB7 β Digital I/O |
| Pin 16 | RB6 β Digital I/O / PGC (ICSP) |
| Pin 17 | RB5/AN11 β Digital I/O / ADC channel 11 |
| Pin 18 | RB4/AN10 β Digital I/O / ADC channel 10 |
| Pin 19 | D- β USB data minus |
| Pin 20 | D+ β USB data plus |
Typical Applications
PIC16F1458-I/SS is suitable for 6 applications: USB HID Input Devices, USB-to-UART Bridge Dongle, Capacitive Touch Interface, Battery-Powered Sensor Node, Industrial Data Acquisition, Consumer Electronics Peripherals.
USB HID Input Devices
The PIC16F1458-I/SS is ideal for USB HID input devices such as keyboards, mice, game controllers, and custom input peripherals. Its integrated USB 2. Full-Speed controller eliminates the need for an external crystal thanks to the internal 48 MHz oscillator with active clock tuning, reducing BOM cost and PCB area. The 7 KB Flash comfortably fits a USB HID bootloader and matrix-scan firmware, while 18 I/O pins handle a 104-key keyboard matrix. Place a 100 nF decoupling capacitor within 5 mm of VDD and route D+/D- as a 90 ohm differential pair.
Recommended
USB-to-UART Bridge Dongle
The PIC16F1458-I/SS serves as the heart of a USB-to-UART bridge, replacing FTDI-style bridges at a lower unit cost. The built-in USB Full-Speed peripheral enumerates as a CDC ACM device, and the USART peripheral drives TX/RX at 115200 baud or higher. The 10-bit ADC can monitor bus voltage for suspend/resume detection, while XLP technology keeps sleep current under 1 uA when USB is suspended. This fits into small dongle form factors such as debugging cables and firmware update adapters.
Recommended
Capacitive Touch Interface
The PIC16F1458-I/SS supports capacitive touch sensing via the mTouch peripheral, enabling touch buttons, sliders, and proximity sensors. Its 18 I/O pins can be configured as touch channels with the on-chip charge-time measurement unit (CTMU), eliminating dedicated touch controller ICs. The internal 48 MHz oscillator provides fast scan rates, and the 10-bit ADC supports additional analog sensing such as ambient light or temperature. The 20-SSOP package is well-suited for compact consumer interfaces in appliances and audio devices.
Recommended
Battery-Powered Sensor Node
The PIC16F1458-I/SS is well-suited to battery-powered sensor nodes with USB reporting thanks to XLP (eXtreme Low Power) technology. Sleep current below 1 uA allows years of operation on a CR2032 cell, and the 10-bit ADC with 9 channels reads temperature, voltage, and sensor inputs. The USB peripheral wakes the device on host connection to upload buffered data without external components. The 2.5V-5.5V supply range accommodates single-cell Li-ion, 3V coin cells, and 5V USB bus power.
Recommended
Industrial Data Acquisition
The PIC16F1458-I/SS fits industrial measurement nodes requiring USB connectivity for configuration and data download. Its 10-bit ADC provides adequate resolution for many sensor types, and the 18 I/O pins drive status LEDs, relay controls, or digital sensors. The industrial -40C to +85C temperature range handles factory floor conditions, and the SSOP package suits compact IP65 enclosures. USB CDC enumeration allows integration with standard SCADA software without custom drivers.
Recommended
Consumer Electronics Peripherals
The PIC16F1458-I/SS powers low-cost consumer USB peripherals such as presentation clickers, RGB lighting controllers, and HID audio mixers. Its small 20-SSOP footprint fits inside USB dongle enclosures, and the 4x 10-bit PWM outputs drive LEDs or small motors directly. The internal 48 MHz oscillator eliminates the USB crystal, simplifying assembly and reducing per-unit cost. The combination of USB, ADC, and PWM in a single 8-bit MCU delivers excellent price-to-feature value in this segment.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F1458-I/SS β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1455-I/SS | PIC16F1459-I/SS | PIC16F1458T-I/SS | PIC16F1458-E/SS |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-SSOP | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same |
| Flash Memory | 7 KB | 14 KB | 14 KB | 7 KB | 7 KB |
| RAM | 512 B | 1 KB | 1 KB | 512 B | 512 B |
| USB Peripheral | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C |
| ADC Channels | 9 channels | 9 channels | 9 channels | 9 channels | 9 channels |
| Maximum CPU Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
Key Differentiators
- Lowest-cost USB-capable PIC16 MCU in 20-SSOP (vs PIC16F1455-I/SS)
- Compact 20-SSOP footprint with USB Full-Speed (vs PIC16F1458-I/P)
- USB peripheral integrated without external crystal (vs PIC16F1454-I/SS)
Design Notes
Place a 100 nF ceramic decoupling capacitor within 5 mm of the VDD pin (pin 1) and a 10 uF bulk capacitor nearby. According to the Microchip PIC16F1458 datasheet, the USB peripheral's internal 3.3V regulator requires adequate bulk capacitance on the VUSB3V3 pin to meet USB suspend current limits. Estimated: at 48 MHz active, the core draws approximately 6 mA; with USB active add 2 mA. Sleep current is below 1 uA when the USB transceiver is disabled.
Route D+ and D- as a 90-ohm differential pair per USB 2.0 Full-Speed specification, keeping them matched within 150 mil length tolerance. Per the Microchip datasheet, the VSS pin (13) must be connected to a low-impedance ground plane to maintain signal integrity for the USB transceiver. Avoid routing digital signals across the USB differential pair - this couples noise into the data lines and degrades eye-diagram margins.
The internal 48 MHz oscillator with active clock tuning is required for USB operation - do not disable this feature in firmware. According to the Microchip datasheet, the active clock tuning adjusts the internal oscillator against the USB Start-of-Frame packets to maintain +/-0.25% accuracy, which is mandatory for USB Full-Speed compliance. Estimated: when the USB peripheral is in suspend mode, ensure the firmware clears the USBIE bit to drop current below 2.5 mA USB suspend limit.
Do not omit the MCLR pull-up resistor on RA3/MCLR pin - the device will fail to start reliably. According to the Microchip PIC16F1458 datasheet, the ICSP programming pins (RB6/PGC, RB7/PGD) must not be pulled low at reset, or the part enters programming mode. Add a 10 kOhm pull-up to MCLR and ensure no strong pulldown on RB6/RB7 during normal operation.
Compliance Information
RoHS compliant per Microchip product page. Industrial -40C to +85C grade; not AEC-Q100 qualified - use AEC-Q100 qualified PIC variants for automotive.
