pca9547bs NXP Semiconductors, pca9547bs Datasheet

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pca9547bs

Manufacturer Part Number
pca9547bs
Description
Pca9547 8-channel I2c-bus Multiplexer With Reset
Manufacturer
NXP Semiconductors
Datasheet

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1. General description
2. Features
The PCA9547 is an octal bidirectional translating multiplexer controlled by the I
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 I
I
that the master can regain control of the bus.
The pass gates of the multiplexers are constructed such that the V
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.
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
2
C-bus state machine causing all the channels to be deselected, except Channel 0 so
PCA9547
8-channel I
Rev. 02 — 12 September 2006
1-of-8 bidirectional translating multiplexer
I
Active LOW RESET input
3 address pins allowing up to 8 devices on the I
Channel selection via I
Power-up with all channels deselected except Channel 0 which is connected
Low R
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
2
C-bus interface logic; compatible with SMBus standards
on
multiplexers
2
C-buses is stuck in a LOW state. Pulling the RESET pin LOW resets the
2
C-bus multiplexer with reset
2
C-bus, one channel at a time
2
C-bus
DD
Product data sheet
pin can be used to
2
C-bus.

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pca9547bs Summary of contents

Page 1

PCA9547 8-channel I Rev. 02 — 12 September 2006 1. General description The PCA9547 is an octal bidirectional translating multiplexer controlled by the I The SCL/SDA upstream pair fans out to eight downstream pairs, or channels. Only one SCx/SDx channel ...

Page 2

... Ordering information Table 1. Type number PCA9547D PCA9547PW PCA9547BS 3.1 Ordering options Table 2. Type number PCA9547D PCA9547PW PCA9547BS PCA9547_2 Product data sheet Ordering information Package Name Description SO24 plastic small outline package; 24 leads; body width 7.5 mm TSSOP24 plastic thin shrink small outline package; 24 leads; ...

Page 3

Philips Semiconductors 4. Block diagram PCA9547 SC0 SC1 SC2 SC3 SC4 SC5 SC6 SC7 SD0 SD1 SD2 SD3 SD4 SD5 SD6 SD7 RESET SCL SDA Fig 1. Block diagram of PCA9547 PCA9547_2 Product data sheet SWITCH ...

Page 4

... SC0 SD1 6 PCA9547PW SC1 7 8 SD2 SC2 9 SD3 10 SC3 Fig 3. Pin configuration for TSSOP24 SC7 16 SD7 PCA9547BS 15 SC6 14 SD6 13 SC5 002aaa960 © Koninklijke Philips Electronics N.V. 2006. All rights reserved SDA 22 SCL SC7 19 SD7 18 SC6 ...

Page 5

Philips Semiconductors 5.2 Pin description Table 3. Symbol A0 A1 RESET SD0 SC0 SD1 SC1 SD2 SC2 SD3 SC3 V SS SD4 SC4 SD5 SC5 SD6 SC6 SD7 SC7 A2 SCL SDA V DD [1] HVQFN package die supply ground ...

Page 6

Philips Semiconductors 6. Functional description 6.1 Device addressing Following a START condition, the bus master must output the address of the slave it is accessing. The address of the PCA9547 is shown in internal pull-up resistors are incorporated on the ...

Page 7

Philips Semiconductors Table 4. Write = channel selection; Read = channel status 6.3 RESET input The RESET input is an active LOW signal which may be used to recover ...

Page 8

Philips Semiconductors 6.5 Voltage translation The pass gate transistors of the PCA9547 are constructed such that the V be used to limit the maximum voltage that will be passed from one I (1) maximum (2) typical (3) minimum Fig 7. ...

Page 9

Philips Semiconductors 7. Characteristics of the I 2 The I C-bus is for 2-way, 2-line communication between different ICs or modules. The two lines are a serial data line (SDA) and a serial clock line (SCL). Both lines must be ...

Page 10

Philips Semiconductors 7.2 System configuration A device generating a message is a ‘transmitter’; a device receiving is the ‘receiver’. The device that controls the message is the ‘master’ and the devices which are controlled by the master are the ‘slaves’ ...

Page 11

Philips Semiconductors 7.4 Bus transactions Data is transmitted to the PCA9547 control register using the Write mode as shown in Figure 12. SDA Fig 12. Write control register Data is read from PCA9547 using the Read mode as shown in ...

Page 12

Philips Semiconductors 8. Application design-in information 2 I C-bus/SMBus master Fig 14. Typical application PCA9547_2 Product data sheet SDA SDA SCL SCL RESET Rev. 02 — 12 September ...

Page 13

Philips Semiconductors 9. Limiting values Table 5. In accordance with the Absolute Maximum Rating System (IEC 60134). Symbol tot T stg T amb [1] The performance capability ...

Page 14

Philips Semiconductors 10. Static characteristics Table 6. Static characteristics See Table 7 on page 15 for Symbol Parameter ...

Page 15

Philips Semiconductors Table 7. Static characteristics See Table 6 on page 14 for Symbol Parameter Supply V supply ...

Page 16

Philips Semiconductors 11. Dynamic characteristics Table 8. Dynamic characteristics Symbol Parameter t propagation delay PD f SCL clock frequency SCL t bus free time between a STOP and BUF START condition t hold time (repeated) START condition HD;STA t LOW ...

Page 17

Philips Semiconductors SDA t BUF t LOW SCL t HD;STA P S Fig 15. Definition of timing on the I SCL SDA RESET 50 % Fig 16. Definition of RESET timing PCA9547_2 Product data sheet ...

Page 18

Philips Semiconductors 12. Package outline SO24: plastic small outline package; 24 leads; body width 7 pin 1 index 1 e DIMENSIONS (inch dimensions are derived from the original mm dimensions) A UNIT ...

Page 19

Philips Semiconductors TSSOP24: plastic thin shrink small outline package; 24 leads; body width 4 pin 1 index 1 DIMENSIONS (mm are the original dimensions) A UNIT max. 0.15 0.95 mm ...

Page 20

Philips Semiconductors HVQFN24: plastic thermal enhanced very thin quad flat package; no leads; 24 terminals; body 0.85 mm terminal 1 index area terminal 1 24 index area DIMENSIONS (mm are ...

Page 21

Philips Semiconductors 13. Soldering 13.1 Introduction to soldering surface mount packages There is no soldering method that is ideal for all surface mount IC packages. Wave soldering can still be used for certain surface mount ICs, but it is not ...

Page 22

Philips Semiconductors – larger than or equal to 1.27 mm, the footprint longitudinal axis is preferred to be parallel to the transport direction of the printed-circuit board; – smaller than 1.27 mm, the footprint longitudinal axis must be parallel to ...

Page 23

Philips Semiconductors [3] These transparent plastic packages are extremely sensitive to reflow soldering conditions and must on no account be processed through more than one soldering cycle or subjected to infrared reflow soldering with peak temperature exceeding 217 C body ...

Page 24

Philips Semiconductors 15. Revision history Table 13. Revision history Document ID Release date PCA9547_2 20060912 • Modifications: changed Section 4 “Marking” to • Section 6.3 “RESET • Table 6 “Static characteristics” description of symbol R “multiplexer” to Conditions column) • ...

Page 25

Philips Semiconductors 16. Legal information 16.1 Data sheet status [1][2] Document status Product status Objective [short] data sheet Development Preliminary [short] data sheet Qualification Product [short] data sheet Production [1] Please consult the most recently issued document before initiating or ...

Page 26

Philips Semiconductors 18. Contents 1 General description . . . . . . . . . . . . . . . . . . . . . . 1 2 Features . . . . . . . . ...

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