PCA9518DBQR

Mfr. #:: PCA9518DBQR
描述:: Interface - I/O Expanders Expandable 5-Ch I2C Hub
生命週期:: 製造商新產品
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更多信息:: PCA9518DBQR 更多信息 PCA9518DBQR Product Details

產品屬性
屬性值

製造商：: 德州儀器

產品分類：: 接口 - I/O 擴展器

RoHS：: Y

I/O 數量：: 5 I/O

最大時鐘頻率：: 400 kHz

工作電源電壓：: 3 V to 3.6 V

最低工作溫度：: - 40 C

最高工作溫度：: + 85 C

安裝方式：: 貼片/貼片

包裝/案例：: QSOP-20

打包：: 捲軸

特徵：: 復位引腳

系列：: PCA9518

品牌：: 德州儀器

邏輯系列：: 主成分分析

濕氣敏感：: 是的

產品類別：: 輸入/輸出擴展器

出廠包裝數量：: 2500

子類別：: 接口 IC

單位重量：: 0.004437 oz

Tags: PCA9518DB, PCA9518D, PCA9518, PCA951, PCA95, PCA9, PCA

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We guarantee 100% customer satisfaction.

Quality Guarantees

We provide 90-360 days warranty.

If the items you received were not in perfect quality, we would be responsible for your refund or replacement, but the items must be returned in their original condition.
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Step1:
Vacuum Packaging with PL

Step2:
Anti-Static Bag

Step3:
Packaging Boxes

PCA9518DBQR 評級和評論

K***s

2019-01-08

S***n

Everything corresponds to the description. it came in time.

2019-02-06

A***l

Two months to moscow

2019-04-10

E**x

Super !

2019-03-18

PCA9518DBQR 描述

***as Instruments: 5-channel bidirectional 3- to 3.6-V expandable 400-kHz I2C/SMBus buffer/hub 20-SSOP -40 to 85

***ical: I2C Buffer/Repeater 3.3V 20-Pin SSOP T/R

***i-Key: IC INTERFACE SPECIALIZED 20QSOP

***i-Key Marketplace: PCA9518 EXPANDABLE FIVE-CHANNEL

***: The PCA9518 is an expandable five-channel bidirectional buffer for I2C and SMBus applications. The I2C protocol requires a maximum bus capacitance of 400 pF, which is derived from the number of devices on the I2C bus and the bus length. The PCA9518 overcomes this restriction by separating and buffering the I2C data (SDA) and clock (SCL) lines into multiple groups of 400-pF segments. Any segment-to-segment transition sees only one repeater delay. Each PCA9518 can communicate with other PCA9518 hubs through a 4-wire inter-hub expansion bus. Using multiple PCA9518 parts, any width hub (in multiples of five) can be implemented using the expansion pins, with only one repeater delay and no functional degradation of the system performance.

***OMO Electronic: The PCA9518 does not support clock stretching across the repeater.

***as Instr.: The device is designed for 3-V to 3.6-V VCC operation, but it has 5-V tolerant I2C and enable (EN) input pins. This feature allows for translation from 3 V to 5 V between a master and slave. The enable pin also can be used to electrically isolate a repeater segment from the I2C bus. This is useful in cases where one segment needs to run at 100 kHz while the rest of the system is at 400 kHz. If the master is running at 400 kHz, the maximum system operating frequency may be less than 400 kHz, because of the delays added by the repeater.

***ASIN: The output low levels for each internal buffer are approximately 0.5 V, but the input voltage of each internal buffer must be 70 mV or more below the output low level, when the output internally is driven low. This prevents a lockup condition from occurring when the input low condition is released.

***as Instruments Inc.: A PCA9518 cluster cannot be put in series with a repeater such as the PCA9515 or another PCA9518 cluster, as the design does not allow this configuration. Multiple PCA9518 devices can be grouped with other PCA9518 devices into any size cluster using the EXPxxxx pins that allow the I2C signals to be sent or received from one PCA9518 to another PCA9518 within the cluster. Because there is no direction pin, slightly different valid low voltage levels are used to avoid lockup conditions between the input and the output of individual repeaters in the cluster. A valid low applied at the input of any of the PCA9518 devices is propagated as a buffered low, with a slightly higher value, to all enabled outputs in the PCA9518 cluster. When this buffered low is applied to another repeater or separate PCA9518 cluster (not connected via the EXPxxxx pins) in series, the second repeater or PCA9518 cluster does not recognize it as a regular low and does not propagate it as a buffered low again. For this reason, the PCA9518 should not be put in series with other repeater or PCA9518 clusters.

***AS INS: The PCA9518 has five multidirectional open-drain buffers designed to support the standard low-level-contention arbitration of the I2C bus. Except during arbitration, the PCA9518 acts like a pair of noninverting open-drain buffers, one for SDA and one for SCL.

***XS: There is an internal power-on-reset circuit (VPOR) that allows for an initial condition and the ramping of VCC to set the internal logic.

***as Instruments (TI): As with the standard I2C system, pullup resistors are required on each SDAn and SCLn to provide the logic high levels on the buffered bus. The size of these pullup resistors depends on the system, but it is essential that each side of the repeater have a pullup resistor. The device is designed to work with standard-mode and fast-mode I2C devices in addition to SMBus devices. Standard-mode I2C devices only specify 3 mA in a generic I2C system where standard-mode devices and multiple masters are possible.

PCA9518DBQR 更多信息

PCA9518 12C Hub: OMO Electronic' PCA9518 expandable five-channel I2C protocol requires a maximum bus capacitance of 400pF, which is derived from the number of devices on the I2C bus and the bus length. Each PCA9518 can communicate with other PCA9158 hubs through a 4-wire inter-hub expansion bus. Using multiple PCA9518 parts, any width hub can be implemented using the expansion pins, with only one repeater delay and no functional degradation of the system performance. The low-power device is ideal for telecom, server, and computing applications.

Market price

型號	描述	庫存	價格
PCA9518DBQR DISTI # 296-22764-1-ND	IC EXPANDABLE 5CH I2C HUB 20QSOP RoHS: Compliant Min Qty: 1 Container: Cut Tape (CT)	2393In Stock	1000:$0.9857 500:$1.1897 100:$1.4480 10:$1.8010 1:$2.0100
PCA9518DBQR DISTI # 296-22764-6-ND	IC EXPANDABLE 5CH I2C HUB 20QSOP RoHS: Compliant Min Qty: 1 Container: Digi-Reel®	2393In Stock	1000:$0.9857 500:$1.1897 100:$1.4480 10:$1.8010 1:$2.0100
PCA9518DBQR DISTI # 296-22764-2-ND	IC EXPANDABLE 5CH I2C HUB 20QSOP RoHS: Compliant Min Qty: 2500 Container: Tape & Reel (TR)	Temporarily Out of Stock	5000:$0.8580 2500:$0.8910
PCA9518DBQR DISTI # PCA9518DBQR	I2C Hub 20-Pin SSOP T/R - Tape and Reel (Alt: PCA9518DBQR) RoHS: Compliant Min Qty: 2500 Container: Reel	Americas - 0	2500:$0.9569 5000:$0.9109 10000:$0.8809 15000:$0.8509 25000:$0.8279
PCA9518DBQR DISTI # PCA9518DBQR	I2C Hub 20-Pin SSOP T/R (Alt: PCA9518DBQR) RoHS: Compliant Min Qty: 2500 Container: Tape and Reel	Europe - 0	2500:€1.1069 5000:€0.9789 10000:€0.8769 15000:€0.8339 25000:€0.7949
PCA9518DBQRG4 DISTI # PCA9518DBQRG4	I2C Hub 20-Pin SSOP T/R (Alt: PCA9518DBQRG4) RoHS: Compliant Min Qty: 2500 Container: Tape and Reel	Europe - 0
PCA9518DBQR	Expandable Five-Channel I2C Hub	4950	1000:$0.7500 750:$0.8200 500:$1.0000 250:$1.1900 100:$1.2900 25:$1.4800 10:$1.5900 1:$1.7800
PCA9518DBQR	Interface Circuit, PDSO20 RoHS: Compliant	9353	1000:$0.8700 500:$0.9100 100:$0.9500 25:$0.9900 1:$1.0700
PCA9518DBQR DISTI # 595-PCA9518DBQR	Interface - I/O Expanders Expandable 5-Ch I2C Hub RoHS: Compliant	2500	1:$1.9500 10:$1.6500 100:$1.3200 500:$1.1600 1000:$0.9570 2500:$0.8910 5000:$0.8580
PCA9518DBQRG4 DISTI # 595-PCA9518DBQRG4	Interface - I/O Expanders Expandable 5-Ch I2C Hub RoHS: Compliant	0

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