Datasheet > PCA9507D,112

PCA9507D,112

更新时间： 2024-11-16 09:58:27

品牌	Logo	应用领域
恩智浦 - NXP		PC
页数	文件大小	规格书
20页	129K
描述
PCA9507 - 2-wire serial bus extender for HDMI DDC I2C-bus and SMBus SOIC 8-Pin

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PCA9507D,112 数据手册

PCA9507

2-wire serial bus extender for HDMI DDC I²C-bus and SMBus

Rev. 01 — 7 February 2008

Product data sheet

1. General description

The PCA9507 is a 2-wire serial bus extender providing 3.3 V to 5 V level shift that allows

up to 18 meters bus extension for reliable DDC, I²C-bus or SMBus applications. 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) line as well as the rise time accelerator on port A

enabling the bus to drive a load up to 1400 pF or distance of 18 m on port A, and 400 pF

on port B. Using the PCA9507 enables the system designer to isolate bus capacitance to

meet HDMI DDC version 1.3 distance speciﬁcation. The SDA and SCL pins are

overvoltage tolerant and are high-impedance when the PCA9507 is unpowered.

The port B drivers with static level offset behave much like the drivers on the PCA9515

device, while the port A drivers integrate the rise time accelerator, sink more current and

eliminate the static offset voltage. This results in a LOW on port B translating into a nearly

0 V LOW on port A. The static level offset design of the port B I/O drivers prevent them

from being connected to another device that has rise time accelerator including the

PCA9510, PCA9511, PCA9512, PCA9513, PCA9514, PCA9515, PCA9516A, PCA9517

(B-side), or PCA9518. The port A sides of two or more PCA9507s can be connected

together, however, to allow a star topography with port A on the common bus, and port A

can be connected directly to any other buffer with static or dynamic offset voltage. Multiple

PCA9507s can be connected in series, port A to port B, with no build-up in offset voltage

with only time of ﬂight delays to consider. Rise time accelerator on port A is turned on

when input threshold is above 0.3V_CC(A)

The PCA9507 drivers are not enabled unless V_CC(A)and V_CC(B)are above 2.7 V. The 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 enable pin when the bus is idle. The output

pull-down on the port B internal buffer LOW is set for approximately 0.5 V, while the input

threshold of the internal buffer is set about 70 mV lower (0.43 V). When the port B 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.

2. Features

I 2 channel, bidirectional buffer isolates capacitance allowing 1400 pF on port A and

400 pF on port B

I Exceeds 18 meters (above the maximum distance for HDMI DDC)

I Rise time accelerator and normal I/O on port A

I Static level offset on port B

I Voltage level translation from 2.7 V to 5.5 V

I Upgrade replacement over PCA9517 for cable application

12 3 4 5 6 7...20

中文翻译

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PCA9507D,112 替代型号

型号	品牌	替代类型	描述	数据表
PCA9507DP,118	NXP	完全替代	PCA9507 - 2-wire serial bus extender for HDMI DDC I2C-bus and SMBus TSSOP 8-Pin
PCA9507D,118	NXP	功能相似	PCA9507 - 2-wire serial bus extender for HDMI DDC I2C-bus and SMBus SOIC 8-Pin
PCA9507DP	NXP	功能相似	2-wire serial bus extender for HDMI DDC I2C-bus and SMBus

与PCA9507D,112相关器件

型号	品牌	获取价格	描述	数据表
PCA9507D,118	NXP	获取价格	PCA9507 - 2-wire serial bus extender for HDMI DDC I2C-bus and SMBus SOIC 8-Pin
PCA9507DP	NXP	获取价格	2-wire serial bus extender for HDMI DDC I2C-bus and SMBus
PCA9507DP,118	NXP	获取价格	PCA9507 - 2-wire serial bus extender for HDMI DDC I2C-bus and SMBus TSSOP 8-Pin
PCA9507DP-T	NXP	获取价格	暂无描述
PCA9507D-T	NXP	获取价格	暂无描述
PCA9508	NXP	获取价格	Smart, simple solutions for the 12 most common design concerns
PCA9508D	NXP	获取价格	Hot swappable level translating I2C-bus repeater
PCA9508D,112	NXP	获取价格	PCA9508 - Hot swappable level translating I2C-bus repeater SOIC 8-Pin
PCA9508D,118	NXP	获取价格	PCA9508 - Hot swappable level translating I2C-bus repeater SOIC 8-Pin
PCA9508DP	NXP	获取价格	Hot swappable level translating I2C-bus repeater

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