PCA9547

General description

The PCA9547 is an octal bidirectional translating multiplexer controlled by the I²C-bus. The SCL/SDA upstream pair fans out to eight downstream pairs, or channels. Only one SCx/SDx channel can be selected at a time, determined by the contents of the programmable control register. The device powers up with Channel 0 connected, allowing immediate communication between the master and downstream devices on that channel.

An active LOW reset input allows the PCA9547 to recover from a situation where one of the downstream I²C-buses is stuck in a LOW state. Pulling the RESET pin LOW resets the I²C-bus state machine causing all the channels to be deselected, except Channel 0 so that the master can regain control of the bus.

The pass gates of the multiplexers are constructed such that the V_DD pin can be used to limit the maximum high voltage which will be passed by the PCA9547. This allows the use of different bus voltages on each pair, so that 1.8 V, 2.5 V, or 3.3 V parts can communicate with 5 V parts without any additional protection. External pull-up resistors pull the bus up to the desired voltage level for each channel. All I/O pins are 5 V tolerant.

Features

• 1-of-8 bidirectional translating multiplexer
• I²C-bus interface logic; compatible with SMBus standards
• Active LOW RESET input
• 3 address pins allowing up to 8 devices on the I²C-bus
• Channel selection via I²C-bus, one channel at a time
• Power-up with all channels deselected except Channel 0 which is connected
• Low R_on multiplexers
• Allows voltage level translation between 1.8 V, 2.5 V, 3.3 V and 5 V buses
• No glitch on power-up
• Supports hot insertion
• Low standby current
• Operating power supply voltage range of 2.3 V to 5.5 V
• 5 V tolerant inputs
• 0 Hz to 400 kHz clock frequency
• ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115, and 1000 V CDM per JESD22-C101
• Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA
• Packages offered: SO24, TSSOP24, HVQFN24

Products/packages

Type number	North American Type number	Ordering code (12NC)	Product status	Package	Packing	Marking	Chemical content	Leadfree conversion date
PCA9547BS	PCA9547BS-T	9352 807 87118	Volume production	SOT616-1 (HVQFN24)	Reel Pack, SMD, 13"	Standard Marking	PCA9547BS	Always Pb-free
PCA9547D	PCA9547D	9352 807 88112	Volume production	SOT137-1 (SO24)	Tube	Standard Marking	PCA9547D	Always Pb-free
PCA9547D	PCA9547D-T	9352 807 88118	Volume production	SOT137-1 (SO24)	Reel Pack, SMD, 13"	Standard Marking	PCA9547D	Always Pb-free
PCA9547PW	PCA9547PW	9352 807 89112	Volume production	SOT355-1 (TSSOP24)	Tube	Standard Marking	PCA9547PW	Always Pb-free
PCA9547PW	PCA9547PW-T	9352 807 89118	Volume production	SOT355-1 (TSSOP24)	Reel Pack, SMD, 13"	Standard Marking	PCA9547PW	Always Pb-free

Pricing/ordering/availability

Type number	Ordering code(12NC)	Indicative price/unit($)	Region	Distributor	In stock	Inventory date	Buy online	Samples
PCA9547BS	9352 807  87118	1.3000						Order samples
PCA9547D	9352 807  88112	1.3000						Order samples
PCA9547D	9352 807  88118	1.3000						Order samples
PCA9547PW	9352 807  89112	1.3000						not available
PCA9547PW	9352 807  89118	1.3000						Order samples

Applications

Related applications
LCD display - discretes focus
PDA - discretes focus
Motherboard components
50-60 Hz CRT integrated DTV (TV210D)
Mid-range integrated DTV (TV810)
Intelligent washing machine

Block diagrams/pinning

Technical documents

Application Notes

Support Documents

Parametrics/similar products

Type number	Package	Operating temp.(Cel)	I²C-bus(kHz)	Operating voltage(VDC)	Inputs	Outputs	# of Addresses	Reset input pin
PCA9547BS	SOT616-1 (HVQFN24)	-40~85	400	2.3~5.5	1	8	8	yes
PCA9547D	SOT137-1 (SO24)	-40~85	400	2.3~5.5	1	8	8	yes
PCA9547PW	SOT355-1 (TSSOP24)	-40~85	400	2.3~5.5	1	8	8	yes

Similar products

PCA9547 links to the similar products page containing an overview of products that are similar in function or related to the type number(s) as listed on this page. The similar products page includes products from the same catalog tree(s), relevant selection guides and products from the same functional category.

Print / Email

• Print this information
• Email this information

Disclaimer

The information published on product information pages of the www.nxp.com or www.semiconductors.com websites is an extract from product data sheets and is for information purposes only. For detailed information please check the most recent version of the relevant product data sheet as published on these websites. In the event of any conflict between product information pages and data sheets or deviations from information provided in the product data sheets on these product information pages, the information provided in the product data sheets shall prevail.

The product status of the product(s) described in the product data sheet may have changed since publication of the data sheet and therefore information in datasheets on product status may be outdated. The latest information on product status is published on the product information pages of the above-mentioned websites.

As from October 1st, 2006 Philips Semiconductors has a new trade name - NXP Semiconductors, which will be used in future data sheets together with new contact details. In data sheets where the previous Philips references remain, please use the new links as shown below.

http://www.philips.semiconductors.com use http://www.nxp.com

http://www.semiconductors.philips.com use http://www.nxp.com (Internet)

sales.addresses@www.semiconductors.philips.com use salesaddresses@nxp.com (e-mail)

The copyright notice at the bottom of each page (or elsewhere in the document, depending on the version)
- © Koninklijke Philips Electronics N.V. (year). All rights reserved -
is replaced with:
- © NXP B.V. (year). All rights reserved.-

If you have any questions related to the data sheet, please contact our nearest sales office via e-mail or phone (details via salesaddresses@nxp.com). Thank you for your cooperation and understanding.