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PCA9641PWJ
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- NXP PCA9641PWJ
- Type
- NXP
- Minimum package
- 2500 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- NXP
- Electronic Component
- PCA9641PWJ
- Electronic Component
- 1
- Package
- 16-TSSOP
- Type
- Multiplexer; Buffer
- Electronic Component
- Signal Buffer / Repeater / Distributor
- Electronic Component
- 0.001g
- Electronic Component
- 1
- Channel Count
- 2
- Features
- Level Conversion;; and
- Electronic Component
- BM0262567554
- Operating Temperature
- 40℃~+85℃
- Operating Voltage
- 2.3V~3.6V
- Capacitor
- 6pF
- Type
- 2 Bus
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
PCA9641PWJ 产品概述
一、简介
PCA9641PWJ 是恩智浦（NXP）推出的一款用于两线式总线（如 I²C）系统的多路复用器与缓冲器器件。器件提供两通道隔离/缓冲功能，能在保持总线开放漏极特性的同时分割总线段、降低有效负载电容，从而延长总线长度并提升总线可靠性。封装为 16 引脚 TSSOP，适合空间受限的 PCB 布局。
二、主要特点
- 类型：多路复用器 + 缓冲器，双通道（2-ch）。
- 总线类型：2 线式总线输入/输出（SDA/SCL 等开放漏极架构兼容）。
- 工作电压：2.3 V ～ 3.6 V（适配 3.3 V 系统及部分低压系统）。
- 输入电容：典型 6 pF，低电容有助于保持高频信号完整性并支持较快上升时间。
- 工作温度：-40 ℃ ～ +85 ℃（工业级温度范围）。
- 封装：16-TSSOP，便于自动贴装与散热管理。
三、功能说明
PCA9641PWJ 可将单一两线总线分割为两路独立总线段并提供缓冲/隔离，适用于减少每段上的电容负载、限制噪声传播并实现板级或子系统级的总线拓扑优化。器件在传递开漏信号的同时提供低输入电容路径，使得总线上的上升/下降时间更可控，从而支持更稳定的通讯。
四、电气与环境指标（概要）
- 电源电压范围：2.3–3.6 V。
- 通道数：2。
- 输入电容（每路）：约 6 pF（典型）。
- 温度范围：-40 ℃ 至 +85 ℃。
- 兼容性：设计用于与开放漏极/开路集电极驱动的两线制接口配合使用（如 I²C 类总线）；具体时序、驱动能力和电平阈值请参照官方数据手册。
五、封装与 PCB 布局建议
- 在 VCC 近旁放置 0.1 μF 陶瓷旁路电容以抑制电源噪声。
- 总线分段后的每段建议设置独立上拉电阻；上拉阻值需在上升时间与功耗之间折中选择（根据总线容性与速率调整）。
- 将器件放置在需要隔离或扩展的总线分叉处，尽量缩短总线回路与器件引脚之间的走线以降低寄生电容。
- 考虑 ESD 防护与地平面完整性，关键走线避免过长并保持阻抗连续。
六、典型应用场景
- 多板系统中 I²C 总线分段与隔离，减少总线负载并防止单板故障影响全局。
- 总线噪声抑制与信号完整性提升，用于高速或长线路的两线制通信。
- 嵌入式系统、工业控制、传感网络与消费类电子中作为总线缓冲/中继器件使用。
七、设计与使用要点
- 器件为缓冲/隔离用途，仍需保持总线的开漏/上拉结构；不应将其当作主动驱动器直接驱动到高电平。
- 在选择上拉电阻、布线长度及速率时进行仿真与实测验证，以满足系统时序与可靠性要求。
- 如需详细的引脚定义、时序图、容性驱动能力与典型应用电路，请参考 NXP 官方 PCA9641PWJ 数据手册以获取完整规范与参考设计。
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