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PCA9509DP

更新时间： 2024-11-15 04:35:03

品牌	Logo	应用领域
恩智浦 - NXP		驱动程序和接口接口集成电路
页数	文件大小	规格书
16页	101K
描述
Level translating I2C-bus/SMBus repeater

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技术参数
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替代型号

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PCA9509DP 技术参数

是否Rohs认证：	符合	生命周期：	Active
零件包装代码：	SOIC	包装说明：	3 MM, PLASTIC, SOT505-1, TSSOP-8
针数：	8	Reach Compliance Code：	compliant
HTS代码：	8542.39.00.01	风险等级：	5.05
Is Samacsys：	N	接口集成电路类型：	INTERFACE CIRCUIT
JESD-30 代码：	S-PDSO-G8	JESD-609代码：	e4
长度：	3 mm	湿度敏感等级：	1
功能数量：	1	端子数量：	8
最高工作温度：	85 °C	最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	TSSOP
封装等效代码：	TSSOP8,.19	封装形状：	SQUARE
封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	峰值回流温度（摄氏度）：	260
电源：	3/3.3 V	认证状态：	Not Qualified
座面最大高度：	1.1 mm	子类别：	Line Driver or Receivers
最大供电电压：	5.5 V	最小供电电压：	3 V
标称供电电压：	5 V	表面贴装：	YES
技术：	CMOS	温度等级：	INDUSTRIAL
端子面层：	Nickel/Palladium/Gold (Ni/Pd/Au)	端子形式：	GULL WING
端子节距：	0.65 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	30	宽度：	3 mm
Base Number Matches：	1

PCA9509DP 数据手册

PCA9509

Level translating I²C-bus/SMBus repeater

Rev. 01 — 27 June 2006

Product data sheet

1. General description

The PCA9509 is a level translating I²C-bus/SMBus repeater that enables processor low

voltage 2-wire serial bus to interface with standard I²C-bus or SMBus I/O. While retaining

all the operating modes and features of the I²C-bus system during the level shifts, it also

permits extension of the I²C-bus by providing bidirectional buffering for both the data

(SDA) and the clock (SCL) lines, thus enabling the I²C-bus or SMBus maximum

capacitance of 400 pF on the higher voltage side. The SDA and SCL pins are over-voltage

tolerant and are high-impedance when the PCA9509 is unpowered.

The bus port B drivers are compliant with SMBus I/O levels, while port A uses a current

sensing mechanism to detect the input or output LOW signal which prevents bus lock-up.

Port A uses a 1 mA current source for pull-up and a 200 Ω pull-down driver. This results in

a LOW on the port A accommodating smaller voltage swings. The output pull-down on the

port A internal buffer LOW is set for approximately 0.2 V, while the input threshold of the

internal buffer is set about 50 mV lower than that of the output voltage LOW. When the

port A I/O is driven LOW internally, the LOW is not recognized as a LOW by the input. This

prevents a lock-up condition from occurring. The output pull-down on the port B drives a

hard LOW and the input level is set at 0.3 of SMBus or I²C-bus voltage level which

enables port B to connect to any other I²C-bus devices or buffer.

The PCA9509 drivers are not enabled unless V_CC(A)is above 0.8 V and V_CC(B)is above

2.5 V. The enable (EN) pin can also be used to turn the drivers on and off under system

control. Caution should be observed to only change the state of the EN pin when the bus

is idle.

2. Features

I Bidirectional buffer isolates capacitance and allows 400 pF on port B of the device

I Voltage level translation from port A (1 V to V_CC(B)− 1.0 V) to port B (3.0 V to 5.5 V)

I Requires no external pull-up resistors on lower voltage port A

I Active HIGH repeater enable input

I Open-drain inputs/outputs

I Lock-up free operation

I Supports arbitration and clock stretching across the repeater

I Accommodates Standard-mode and Fast-mode I²C-bus devices and multiple masters

I Powered-off high-impedance I²C-bus pins

I Operating supply voltage range of 1.0 V to V_CC(B)− 1.0 V on port A, 3.0 V to 5.5 V on

port B

I 5 V tolerant port B SCL, SDA and enable pins

12 3 4 5 6 7...16

中文翻译

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PCA9509DP 替代型号

型号	品牌	替代类型	描述	数据表
PCA9509D	NXP	功能相似	Level translating I2C-bus/SMBus repeater

与PCA9509DP相关器件

型号	品牌	获取价格	描述	数据表
PCA9509GM	NXP	获取价格	Level translating I2C-bus/SMBus repeater
PCA9509GM,125	NXP	获取价格	PCA9509 - Level translating I²C-bus/SMBus rep
PCA9509P	NXP	获取价格	Low power level translating I2C-bus/SMBus repeater
PCA9509PDP	NXP	获取价格	Low power level translating I2C-bus/SMBus repeater
PCA9509PDP,118	NXP	获取价格	PCA9509P - Low power level translating I²C-bu
PCA9509PGM	NXP	获取价格	Dual Supply Low power level translating I2C-bus/SMBus repeater
PCA950PGM	NXP	获取价格	Low power level translating I2C-bus/SMBus repeater
PCA9510	NXP	获取价格	Hot swappable I2C and SMBus bus buffer
PCA9510A	NXP	获取价格	Hot swappable I2C-bus and SMBus bus buffer
PCA9510AD	NXP	获取价格	Hot swappable I2C-bus and SMBus bus buffer

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