PIC16F914-E/P - 8-Bit 20MHz Flash MCU | Microchip
料号： PIC16F914-E/P ✓ 量产中PIC16F914-E/P 概述
A microcontroller is a programmable semiconductor containing a processor core, memory, and peripherals on one integrated circuit. The PIC16F914 belongs to the PIC16 family of 8-bit reduced-instruction-set computers. Within the product hierarchy, it is a flash-based embedded microcontroller, a type of semiconductor designed for control, measurement, and interface tasks. The PIC16F914-E/P combines 4K × 14-word flash program storage with 256 × 8-bit data RAM, allowing application firmware and working variables to reside on the same device.
Key features include a 20 MHz operating speed, an internal oscillator, 35 I/O lines, LCD-driver capability, and nanoWatt Technology for low-power operation. The verified part listing identifies 35 I/O pins, while another distributor description reports 36 I/O; this difference is retained as an uncertainty rather than resolved without the complete official pin table. The 40-pin DIP format provides generous I/O access for human-machine interfaces, panel controls, instrumentation, and legacy industrial equipment requiring through-hole construction.
The PIC architecture uses a compact instruction set containing 35 single-word instructions and supports an instruction execution time of 200 nanoseconds. Flash program memory permits firmware to be updated during development and production programming rather than requiring a one-time-programmable device. The integrated LCD driver can reduce external display-controller overhead in suitable character or segment-based display designs, while the general-purpose I/O supports switches, sensors, indicators, and external interface logic.
Typical applications include industrial control panels, standalone data-acquisition modules, laboratory instruments, programmable display controllers, HVAC controls, and embedded accessories that use an LCD and several digital I/O lines. A 20 MHz control loop is appropriate for coordination of sensors, switches, and display updates where deterministic local control is more important than high-bandwidth communication. The through-hole package also supports prototype boards, repair work, and applications using sockets rather than compact SMT assemblies.
Designers should confirm the exact pin assignments, oscillator connections, programming interface, and LCD segment mapping against the manufacturer datasheet before layout. The 40-pin DIP footprint requires adequate board spacing and mechanically robust through-hole insertion, while the device's operating-temperature limits, electrical maximum ratings, and regulatory declarations must be confirmed for the intended environment. The -E grade designation should not be used alone to infer an unsupported temperature range.
This page consolidates the verified manufacturer specifications, distributor pricing, package details, lifecycle information, and engineering-oriented application guidance for the PIC16F914-E/P. It also distinguishes confirmed facts from unavailable details and evaluates same-package alternatives without presenting functionally similar but mechanically different parts as drop-in replacements.
直接替换替代料： PIC16F914-E/P ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC16F914-E/P （相同外形与封装尺寸） ——差异在于 LCD Driver, Package, Mounting Type, Core Architecture, I/O Source/Sink Current.
PIC16F914-I/P
✅ 直接替换联系询价
查看数据手册 →PIC16F914T-I/PT
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →PIC16F914T-E/P
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
PIC16F914-E/P 最大额定值与电气特性
| Product Type | 8-bit CMOS flash-based microcontroller |
| Program Memory Size | 7 KB (4K × 14 words) |
| RAM Size | 256 × 8 bits |
| Maximum CPU Speed | 20 MHz |
| Number of I/O Pins | 35 pins |
| Architecture | PIC 8-bit RISC |
| Instruction Set | 35 single-word instructions |
| Instruction Execution Time | 200 ns |
| Program Memory Type | Flash |
| Oscillator Type | Internal |
| 电源电压 | 5 V |
| LCD Driver | Integrated |
| Low-Power Technology | nanoWatt Technology |
| 封装 | 40-pin DIP, 0.600 in (15.24 mm) |
| 安装类型 | Through-hole |
| Shipping Package | Tube |
PIC16F914-E/P tube 引脚配置指南
PIC16F914-E/P（tube 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： PIC16F914-E/P.
请参阅 数据手册 以查看完整引脚配置。
典型应用
PIC16F914-E/P 适用于 6 应用s: Industrial Control Panels, Programmable LCD Instruments, Sensor Monitoring Module, HVAC and Environmental Control, Programmable Logic Controller, Legacy Embedded Product Upgrade.
Industrial Control Panels
The PIC16F914-E/P fits industrial control panels that combine several discrete inputs with an LCD status display. Its verified 35 I/O lines provide ample connections for switches, indicator commands, relays, and sensing signals, while the integrated LCD driver can reduce the external circuitry needed to operate a suitable panel display. The 7 KB of flash program memory stores menu logic, operating states, debounce routines, and display formatting, and the 256-byte RAM supports working variables. At up to 20 MHz, the controller can update controls and displays in real time. The 40-pin DIP package also simplifies assembly and repair on panel boards, although engineers must verify the exact LCD channels and operating limits against the manufacturer datasheet.
推荐
Programmable LCD Instruments
The PIC16F914-E/P is appropriate for standalone LCD instruments in which an operator needs a local display and several embedded control functions. Its integrated LCD driver supports display-oriented designs, and its 35 reported I/O pins leave room for measured inputs, mode buttons, and output commands. The 7 KB flash area holds display formatting, calibration tables, measurement sequencing, and alarm logic, while 256 bytes of RAM provide data and stack working space. A 20 MHz maximum speed supports responsive updates without requiring a higher-complexity processor. Because the LCD implementation and electrical operating conditions are design-specific, the engineer should confirm segment assignments, voltage requirements, and timing directly from the PIC16F914 datasheet.
推荐
Sensor Monitoring Module
The PIC16F914-E/P can serve as the local controller for a sensor-monitoring module that gathers switch or sensor states and presents measurements through a display. The verified 256-byte RAM is suitable for a focused embedded workload, while 7 KB of flash accommodates acquisition routines, filtering, thresholds, and diagnostics. Its 35 I/O lines allow multiple digital inputs and outputs to coexist without requiring a larger package. The internal oscillator eliminates the need for an external clock in straightforward designs, although the exact oscillator configuration must be confirmed. For laboratory or industrial deployment, use the -E ordering variant only after checking its verified environmental limits, and validate sensor signal levels before connecting them directly to the MCU.
推荐
HVAC and Environmental Control
The PIC16F914-E/P can implement a local HVAC or environmental-control controller because it combines 7 KB of flash, 256 bytes of RAM, 35 I/O lines, and a 20 MHz maximum speed in a through-hole package. Firmware can supervise temperature and humidity inputs, operate relays or triacs through suitable driver circuitry, manage operating modes, and present status on an LCD. The integrated LCD driver is useful for compact user interfaces, while the internal oscillator supports a straightforward control design. The MCU should not directly switch inductive loads; use suitable isolation, drive, protection, and suppression components. Confirm the LCD configuration, reset behavior, and exact environmental requirements in the manufacturer documentation before production release.
推荐
Programmable Logic Controller
The PIC16F914-E/P is suitable for a small programmable logic controller handling discrete machine controls, interlocks, counters, alarms, and operator inputs. Its 35 reported I/O pins provide a broad control surface, while flash memory permits reusable firmware for multiple product configurations and 256 bytes of RAM accommodates state variables. The 20 MHz speed is more than sufficient for sequential logic and supervisory tasks that do not require high-bandwidth data processing. A 40-pin DIP package makes the controller practical for relay-heavy boards, prototype machines, and field-serviceable industrial controls. Engineers should account for inductive loads, input conditioning, grounding, and the controller's verified electrical and temperature limits before applying it to safety-related functions.
推荐
Legacy Embedded Product Upgrade
The PIC16F914-E/P can support a lifecycle-extension design that retains a through-hole control board while replacing older discrete logic or a less integrated controller. Its 7 KB flash memory consolidates program code, the 256-byte RAM removes the need for external working memory in modest applications, and 35 I/O lines can replace multiple logic components. The LCD driver is useful when the original product already uses a display, and the 40-pin DIP footprint simplifies repair and prototype assembly. Retrofitting is not automatically pin-compatible: engineers must compare every power, oscillator, programming, I/O, and LCD connection on the original schematic against the current manufacturer datasheet. Firmware behavior and external timing should also be regression-tested before field deployment.
推荐
推荐产品汇总
工程参考数据： PIC16F914-E/P ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PIC16F914-I/P | PIC16F914T-I/P | PIC16F914T-E/P |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 40-pin DIP (0.600 in, 15.24 mm) | 40-pin DIP | 40-pin DIP | 40-pin DIP |
| CPU Architecture | 8-bit PIC RISC | 8-bit PIC RISC | 8-bit PIC RISC | 8-bit PIC RISC |
| Program Memory | 7 KB (4K × 14 words) | 7 KB (4K × 14 words) | 7 KB (4K × 14 words) | 7 KB (4K × 14 words) |
| RAM | 256 × 8 bits | 256 × 8 bits | 256 × 8 bits | 256 × 8 bits |
| Maximum Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Number of I/O Pins | 35 pins | 35 pins | 35 pins | 35 pins |
| Oscillator Type | Internal | Internal | Internal | Internal |
| LCD Driver | Integrated | Integrated | Integrated | Integrated |
关键差异点
- Combines local control and display support （对比 General-purpose 8-bit MCU alternatives)
- Ample integrated I/O for panel and control designs （对比 PIC16F676-I/P)
- Serviceable through-hole package （对比 40-pin TQFP alternatives)
- Flash-based programmability （对比 One-time-programmable control devices)
设计说明
Allocate the full 40-pin DIP footprint with the correct row spacing and insertion geometry for a 0.600-inch-wide package. Do not substitute a 40-pin TQFP layout even when the alternative has a similar pin count; its lead pitch, body width, and footprint are mechanically different. Confirm pin 1 orientation, keep adequate clearance around the IC, and route programming or LCD-related signals according to the manufacturer pin table before releasing the PCB.
Treat the -E suffix as an ordering designation, not as a complete environmental specification. The verified excerpts do not provide the operating-temperature range, absolute maximum ratings, or automotive qualification status. Before deployment, check the current Microchip ordering information and datasheet for those limits. Also reconcile the reported 35 I/O pins with the separate distributor statement of 36 I/O, and use the official pin table for every PCB assignment.
The verified listing identifies a 5 V device and an internal oscillator, but it does not provide detailed current consumption, decoupling, or power-on reset requirements. Follow the manufacturer datasheet for supply tolerance, input capacitance, brownout behavior, and recommended support components. Place required bypass capacitors close to the supply pins and keep power-return paths short so switching currents from external loads do not disturb MCU or LCD signals.
Keep LCD output routing away from switching nodes and high-current relay or motor paths. Although the PIC16F914-E/P integrates an LCD driver, the display still requires correct bias, segment, and commons connections defined by the selected panel. Review the datasheet's LCD timing and electrical limits, preserve the required copper geometry, and test contrast and update behavior across the intended supply range rather than relying only on a nominal 5 V bench condition.
合规信息
The supplied verified snippets do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status for PIC16F914-E/P. No compliance claim has been inferred from the manufacturer name or family designation.
