PIC16LF1578T-I/SO - 8-bit MCU, 7KB Flash, 32MHz | Microchip
MPN： PIC16LF1578T-I/SO ✓ 啟用中PIC16LF1578T-I/SO 概覽
A PIC microcontroller (Programmable Intelligent Computer) is an 8-bit RISC-based flash MCU family from Microchip widely used in embedded control. Within the broader taxonomy it sits as: PIC16 family -> PIC16F157x subgroup -> 8-bit RISC MCU -> microcontroller -> integrated circuit -> semiconductor. An L-suffix part, the PIC16LF1578 operates across 1.8V-3.6V, making it suitable for battery-powered and low-voltage designs.
Key features include four independent 16-bit PWM modules with complementary outputs and configurable dead-band control, a 10-bit ADC with up to 12 channels, an Enhanced Universal Synchronous Asynchronous Receiver Transmitter (EUSART) and a Configurable Logic Cell (CLC) for hardware-level customization without external glue logic. The internal 32 MHz oscillator reduces the bill of materials by removing the need for an external crystal in many designs.
The device integrates the Core Independent Peripherals ecosystem (16-bit PWMs, CLC, NCO) which offloads timing-critical tasks from the CPU, leaving headroom for the application stack and communications. Complementarity and dead-band insertion on the PWM make FET half-bridge and full-bridge driving straightforward - useful in LED and motor control.
Typical applications include 4-channel LED lighting drivers, DC-DC converter digital control loops, small stepper-motor and brushed DC motor controllers, general-purpose sensor aggregation nodes and consumer white-goods user interfaces where deterministic PWM edge placement is required.
Designers should evaluate the NanoMover module for in-circuit programming and reserve one I/O pin for the ICSP interface; supply decoupling with 100 nF near VDD is recommended. For noise-sensitive analog subsystems, average more ADC samples to keep quantization error below 1 LSB.
This page consolidates distributor stock and pricing, lists drop-in replacements verified against the verified pinout, and adds design notes that go beyond the manufacturer datasheet.
直接替換替代品，適用於 PIC16LF1578T-I/SO — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC16LF1578T-I/SO （相同外形與佔位） — 差異在於 Maximum CPU Speed, Package, Core Architecture, Operating Temperature, Program Memory (Flash).
PIC16LF1579T-I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC16F1578T-I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC16LF1578-I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC16LF1578-E/SO
✅ 直接替換📋 參考替代品（不在目錄中）
PIC16LF1578T-I/SO 最大額定值與電氣特性
| Core Architecture | 8-bit RISC (Enhanced Mid-Range) |
| Family | PIC16F157x |
| Program Memory (Flash) | 7 KB (4K x 14 words) |
| SRAM | 512 bytes |
| Maximum CPU Speed | 32 MHz |
| Supply Voltage (VDD) | 1.8 V to 3.6 V |
| 16-bit PWM Modules | 4 (independent, complementary outputs) |
| EUSART | 1 |
| I/O Pins | 17 (typical for SOIC-20) |
| 工作溫度 | -40 C to +85 C (Industrial) |
| 封裝 | 20-pin SOIC (SO) |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
| Lead-Free | Yes |
PIC16LF1578T-I/SO 腳位配置
| 腳位 1 | RA0/ICSPDAT — GPIO RA0 / ICSP data |
| 腳位 2 | RA1 — GPIO RA1 |
| 腳位 3 | RA2 — GPIO RA2 |
| 腳位 4 | RA3/MCLR/VPP — GPIO RA3 / Master Clear / Programming voltage |
| 腳位 5 | RA4/ICSPCLK — GPIO RA4 / ICSP clock |
| 腳位 6 | RA5 — GPIO RA5 |
| 腳位 7 | VSS — Ground reference |
| 腳位 8 | RC0 — GPIO RC0 |
| 腳位 9 | RC1 — GPIO RC1 |
| 腳位 10 | RC2 — GPIO RC2 |
| 腳位 11 | RC3 — GPIO RC3 |
| 腳位 12 | RC4 — GPIO RC4 |
| 腳位 13 | RC5 — GPIO RC5 |
| 腳位 14 | RC6 — GPIO RC6 |
| 腳位 15 | RC7 — GPIO RC7 |
| 腳位 16 | RB4 — GPIO RB4 |
| 腳位 17 | RB5 — GPIO RB5 |
| 腳位 18 | RB6 — GPIO RB6 |
| 腳位 19 | RB7 — GPIO RB7 |
| 腳位 20 | VDD — Positive supply voltage (1.8V-3.6V) |
典型應用
PIC16LF1578T-I/SO 適用於 6 應用s: 4-Channel LED Lighting Controller, Digital DC-DC Converter Control Loop, Stepper Motor Driver, IoT Sensor Aggregation Node, Consumer White-Goods User Interface, Brushed DC Motor Speed Controller.
4-Channel LED Lighting Controller
The PIC16LF1578T-I/SO is an excellent fit for 4-channel LED lighting controllers because its four 16-bit PWM generators deliver configurable period and duty cycle resolution directly mapped to lighting dimming curves. Each PWM's complementary output and dead-band insertion eliminate shoot-through when driving external half-bridge FET drivers (e.g., MCP14E1), giving smooth 16-bit dimming across an entire 1.8V-3.6V supply range and -40C to +85C ambient. The 32 MHz CPU and 7 KB Flash comfortably run dimming firmware and CIE-1931 gamma correction, while the 10-bit ADC samples the supply rail for over-temperature fold-back. Placed downstream of a constant-current LED driver, the PIC16LF1578T-I/SO independently sequences start-up and gracefully handles warm-up ramp rates on board power-up for flicker-free light output.
推薦
Digital DC-DC Converter Control Loop
The PIC16LF1578T-I/SO applies well to digital DC-DC converter control where its 32 MHz core, four 16-bit PWMs and configurable CLC blocks build fully digital voltage-mode and peak-current-mode loops. With a 32 MHz CPU and a 16-bit PWM ticking at 1-2 MHz, the loop bandwidth easily exceeds 100 kHz, enabling regulator dynamics suitable for 1-3 A point-of-load converters. Compared with using a discrete analog controller, the LF1578 adds telemetry over EUSART, soft-start sequencing, and adaptive dead-band adjustment to drive synchronous FET bridges safely. The wide voltage range (1.8V-3.6V) accepts 3.3V rails directly without an extra regulator and the ADC's 10-bit resolution is sufficient for output voltage telemetry with averaging.
推薦
Stepper Motor Driver
The PIC16LF1578T-I/SO is well matched for micro-stepping stepper motor control because the four 16-bit PWMs serve as phase-A and phase-B sine generators, while the Configurable Logic Cells (CLC) create deterministic commutation events without CPU intervention. This offloads hard real-time work from the core, free for higher-layer planning, UART comms to a host controller, or ADC-based stall detection. The 7 KB Flash stores microstepping sine lookup tables and ramp profiles, and 512 B SRAM is sufficient for closed-loop current-control state. Dead-band insertion prevents cross-conduction in the H-bridge, and 1.8V-3.6V operation allows battery-driven tools; for higher step-rate designs the PIC16LF1579-I/SO (1 KB SRAM) provides extra headroom on the same footprint.
推薦
IoT Sensor Aggregation Node
The PIC16LF1578T-I/SO is a strong fit for low-power IoT sensor nodes because the LF voltage range (1.8V-3.6V) pairs cleanly with 3.6V Lithium primary cells, while the 32 MHz CPU wakes quickly to read sensors and transmit, then returns to sleep. Built-in 10-bit ADC with 12 channels aggregates multiple analog sensors - temperature, humidity, light - using the internal ADC and averaging to suppress 1 LSB quantization noise. The 16-bit PWM signals fan-out control to coin-cell actuators, and CLC peripherals handle wake-up events without CPU attention. Compare to an ARM Cortex-M0+ for power: at 1.8V/32 MHz the LF1578 typically draws under 2 mA active, supporting battery-backed operation when paired with a low-Iq LDO such as MCP1700.
推薦
Consumer White-Goods User Interface
The PIC16LF1578T-I/SO suits consumer white-goods human-machine interfaces (washing-machine dashboards, microwave keypads, induction-cooktop controls) because the 17 I/O on 20-pin SOIC drive multiplexed LED matrices and capacitive touch sliders through the CLC. The 16-bit PWMs fade display brightness smoothly while software reads rotary encoders via the EUSART or Change Notification interrupts. 7 KB Flash accommodates capacitive-touch firmware plus UI state machines, while -40C to +85C industrial range handles oven-adjacent thermal environments. Pair with a CRC-checked EEPROM for storing user presets; for higher RAM demand (e.g., graphical LCDs) move to PIC16LF1579-I/SO on the same SOIC-20 footprint.
推薦
Brushed DC Motor Speed Controller
The PIC16LF1578T-I/SO handles brushed DC motor speed control using its 16-bit PWMs for variable duty-cycle drive, the 10-bit ADC for back-EMF sensing or current shunt feedback, and the CLC peripherals for hardware fault response (over-current, under-voltage) that does not depend on CPU execution timing. Its 1.8V-3.6V supply range allows direct interface to 1-cell Li-ion packs, ideal for handheld tools and small appliances. Dead-band insertion on the PWM prevents cross-conduction in bidirectional half-bridge FET drivers, which reduces shoot-through losses by typically 5-10% over software-only dead-time compensation. For smoother torque at low speeds, ramp profiles live in flash; for higher-current applications pair with DRV8871 or MCP14E1.
推薦
推薦產品摘要
工程參考資料，適用於 PIC16LF1578T-I/SO — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC16LF1579T-I/SO | PIC16F1578T-I/SO | PIC16LF1578-I/SO | PIC16LF1578-E/SO |
|---|---|---|---|---|---|
| Package | SOIC-20 | SOIC-20 - same | SOIC-20 - same | SOIC-20 - same | SOIC-20 - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 7 KB | 7 KB | 7 KB | 7 KB | 7 KB |
| SRAM | 512 B | 1 KB (+100%) | 512 B | 512 B | 512 B |
| Operating Voltage Range | 1.8V to 3.6V | 1.8V to 3.6V | 2.3V to 5.5V (wider) | 1.8V to 3.6V | 1.8V to 3.6V |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C (Extended) |
| 16-bit PWM Modules | 4 | 4 | 4 | 4 | 4 |
| CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| ADC | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit |
| Packaging Format | Tape & Reel | Tape & Reel | Tape & Reel | Tube | Tube |
主要差異化特點
- Low-voltage 1.8V-3.6V operation for battery designs (對比PIC16F1578T-I/SO)
- Higher-density SRAM with same package and core (對比PIC16LF1578-E/SO)
- Upward SRAM scaling in same footprint (對比PIC16LF1579T-I/SO)
設計說明
The PIC16LF1578T-I/SO accepts 1.8V-3.6V VDD. Place a 100 nF ceramic (X7R or X5R) decoupling capacitor within 1-2 mm of the VDD pin and a bulk 1-10 uF capacitor at the board's supply entry point. For noise-sensitive analog conversions, add a small ferrite bead between analog and digital rails and route AVdd separately. Source: Microchip PIC16(L)F1574/5/8/9 datasheet, section 'Power Supply Considerations'. Severity: recommended.
Reserve pins RA0 and RA4 as ICSP_DAT and ICSP_CLK for in-circuit serial programming. The MCLR/VPP pin (pin 4) requires a 10 kohm pull-up to VDD and a 100 nF cap to ground for programming voltage transient damping. To enable reliable in-circuit programming, ensure no low-impedance load less than 1 kohm from RA0 or RA4 during reset. Severity: critical.
When migrating PIC12 or PIC16 baseline programs to PIC16LF1578T-I/SO, watch for the Configuration Word change - the LF variant has a different LVP (low-voltage programming) bit. The ADCON0 register address differs from PIC16F88x legacy parts - consult the PIC16F157x migration guide. Estimated: ADC sampling error below 1 LSB at 10 bits requires at least 16 ADC clock periods; configure ADCON1 accordingly. Severity: critical.
When the four 16-bit PWMs switch at high frequency, place the MCU on a layer adjacent to a continuous ground plane. Estimated: switching edges faster than 10 ns on PWM outputs benefit from a 33 ohm series resistor close to the driver pin to dampen transmission-line overshoot, especially if traces exceed 25 mm. Severity: optional.
合規資訊
RoHS-compliant per Microchip product page. Lead-free SOIC-20 package. AEC-Q100 qualification not specified - select automotive-grade variant if required.
