WMSIC Electronic Components

PCA9538APWJ

ModelPCA9538APWJ
PackageTSSOP-16
BrandNXP
Price Price on request Electronic component prices change quickly with market supply and demand. Please refer to the latest WMSIC quotation for current pricing.
Configuration
1 options
Configuration 22+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
NXP PCA9538APWJ
Type
NXP
Minimum package
2500 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
NXP
Electronic Component
PCA9538APWJ
Electronic Component
1
Package
TSSOP-16
Electronic Component
I / O Expander
Electronic Component
0.001g
Electronic Component
1
I / O
8
Features
Built-in LEDDriver; positions; and
Electronic Component
BM0257268265
Operating Temperature
40℃~+85℃
Operating Voltage
1.65V~5.5V
Interface Type
I2C;SMBus
Current(IOH)
10mA
Current(IOL)
25mA

For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.

PCA9538APWJ 产品概述

一、概述

PCA9538APWJ 是恩智浦(NXP)提供的一款低功耗 8 位 I/O 扩展器,采用 I2C/SMBus 接口,可在单芯片上为微控制器提供额外的通用数字 I/O。器件工作电压范围宽(1.65V–5.5V),工作温度-40℃ 至 +85℃,并以 TSSOP-16 封装提供,适用于工业级与便携式系统。

二、主要特性

  • 接口类型:I2C / SMBus,支持最高时钟频率 400 kHz(标准/快速模式)。
  • I/O 数量:8 路通用数字 I/O。
  • 中断输出:带硬件中断输出,便于主机响应外部事件。
  • 电气能力:灌电流(IOL)25 mA,拉电流(IOH)10 mA(器件输出驱动能力需在系统级评估)。
  • 支持设备数量:单总线最多并联 4 个 PCA9538(硬件地址选择),便于扩展。
  • 静态电流:Iq 典型值 1 μA,适合低功耗设计。
  • 工作环境:-40℃ 至 +85℃,满足大多数工业及消费类应用的温度要求。
  • 封装:TSSOP-16,利于密度较高的 PCB 布局。

三、典型应用场景

  • 工业控制与监控面板:扩展有限 MCU 的 GPIO,用于开关、指示灯与状态采集。
  • 电池/便携式设备:低静态电流有利于延长待机时间。
  • 嵌入式系统管理:系统管理总线、键盘矩阵、LED 驱动与状态检测。
  • 通信与网络设备:面板按键、复位与中断信号集中管理。

四、设计与使用建议

  • I2C 总线需配置合适的上拉电阻;在长线或高速应用中按时钟和总线电容选择合适阻值。
  • 中断线建议连接到 MCU 的外部中断口,并增加去抖或中断屏蔽逻辑以提高可靠性。
  • 输出驱动能力有限,若驱动更大负载(比如继电器或大电流 LED),建议使用外部驱动器或缓冲器。
  • 供电引脚与地之间应靠近放置 0.1 μF 去耦电容,降低电源噪声对 I2C 通信的影响。
  • 多器件并联时,合理设置地址引脚并避免 I2C 地址冲突。

五、封装与可靠性

TSSOP-16 封装便于在中小尺寸 PCB 上部署,注意焊盘与散热过孔的设计以保证良好热性能。器件温度范围覆盖工业级,适合要求长期可靠运行的场景。

六、总结

PCA9538APWJ 以其低功耗、工作电压宽、支持 I2C/SMBus 快速通信与外部中断功能,为需要扩展 GPIO 的系统提供了成本效益高且稳定的解决方案。设计时关注 I/O 驱动能力、总线上拉与去耦布置,可在工业、消费与便携式产品中实现可靠应用。

Request for quote

Send RFQ

Use the form for single models, category sourcing, and multi-line BOM requirements.

Send your target model and quantity.

Product sourcing intelligence

Model, package, availability, and BOM fit reviewed before quotation.

WMSIC turns product data, package visuals, BOM context, and sourcing signals into practical RFQ notes for buyers.

Electronic component model and package intelligence review on an ESD-safe inspection bench

Model & package intelligence

Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.

BOM matching and alternative component comparison workstation with protected IC samples

BOM matching & alternatives

BOM lines are compared by package, parameters, quantity, and workable alternatives for cleaner sourcing decisions.

Electronic component sourcing availability dashboard with ESD-protected samples

Sourcing availability signal

Stock routes, quotation confidence, lead-time notes, and shipment feasibility are checked before sales follow-up.

Buyer sourcing scenarios

Examples of how common component sourcing requests are organized.

Typical RFQ scenarios based on the WMSIC form fields, catalog data, manual review steps, and shipment preparation workflow.

The buyer shares the full part number, package requirement, quantity, destination, and available product photos so the quotation can record the exact version under review.

Package confirmation Typical RFQ workflow

A multi-line BOM is organized into direct sourcing lines, lines that need package clarification, and lines where alternative-part review is permitted.

Mixed BOM triage Typical RFQ workflow

The original manufacturer part number, datasheet revision, application, critical limits, and acceptable changes are collected before possible candidates are discussed.

Obsolete-part review Typical RFQ workflow

Sample quantity, minimum packing, package format, target date, and courier destination are kept together in one RFQ conversation.

Small-batch request Typical RFQ workflow

Package photos, model markings, board context, and the quantity needed for repair help focus the sourcing review on the relevant version.

Repair batch evidence Typical RFQ workflow

When a suffix or package note is incomplete, the response records the open difference and requests buyer confirmation before procurement proceeds.

Model suffix clarification Typical RFQ workflow

Packing format, carton notes, invoice details, courier option, destination, and tracking handoff are coordinated around the confirmed order.

Export handoff Typical RFQ workflow

The request connects the previously used model, current demand, package evidence, target timing, and replenishment sourcing route.

Replenishment inquiry Typical RFQ workflow

Related products

Packaged components ready for RFQ.