PCA9540 Philips Semiconductors, PCA9540 Datasheet

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PCA9540

Manufacturer Part Number
PCA9540
Description
2-channel I2C multiplexer
Manufacturer
Philips Semiconductors
Datasheet

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INTEGRATED CIRCUITS
PCA9540
2
2-channel I
C multiplexer
Product specification
1999 Dec 15

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PCA9540 Summary of contents

Page 1

... PCA9540 2 2-channel I C multiplexer Product specification INTEGRATED CIRCUITS 1999 Dec 15 ...

Page 2

... The pass gates of the multiplexer are constructed such that the V pin can be used to limit the maximum high voltage which will be passed by the PCA9540. This allows the use of different bus voltages on each SCx/SDx pair, so that 3.3 V parts can communicate with 5 V parts without any additional protection. ...

Page 3

... Philips Semiconductors 2 2-channel I C multiplexer BLOCK DIAGRAM SC0 SC1 SD0 SD1 V SS Power- Reset SCL Input Filter SDA 1999 Dec C-Bus Control 3 Product specification PCA9540 SW00492 ...

Page 4

... A SC0x/SD0x downstream pair, or channel, is selected by the contents of the control register. This register is written after the PCA9540 has been addressed. The 2 LSBs of the control byte are used to determine which channel selected. When a channel is selected, the channel will become active after a stop condition has ...

Page 5

... PREVIOUS CHANNEL Figure 6. WRITE control register CONTROL REGISTER R/W acknowledge from slave Figure 7. READ control register 5 Product specification PCA9540 9 clock pulse for acknowledgement SW00368 acknowledge from slave NEW CHANNEL t pv SW00498 ...

Page 6

... DD swout 3 –100 A swin DD swout 2 –100 A swin DD swout 2 –100 A swin DD swout 6 Product specification PCA9540 RATING UNIT –0.5 to +7.0 V –0 100 mA 100 mA 400 mW –60 to +150 +70 C LIMITS UNIT UNIT MIN TYP MAX 2 ...

Page 7

... C-bus system, but the requirement 1000 + 250 = 1250 ns (according to the standard-mode rmax SU:DAT HD;DAT HIGH SU;DAT Sr 2 Figure 8. Definition of timing on the I C-bus 7 Product specification PCA9540 FAST-MODE 2 I C-BUS UNIT MIN MAX 400 kHz – 1.3 – s – 0.6 – ...

Page 8

... Philips Semiconductors 2 2-channel I C multiplexer SO8: plastic small outline package; 8 leads; body width 3.9mm 1999 Dec 15 8 Product specification PCA9540 SOT96-1 ...

Page 9

... Philips Semiconductors 2 2-channel I C multiplexer TSSOP8: plastic thin shrink small outline package; 8 leads; body width 3 mm 1999 Dec 15 9 Product specification PCA9540 SOT505-1 ...

Page 10

... Dec components conveys a license under the Philips’ system provided the system conforms to the [1] Copyright Philips Electronics North America Corporation 2000 Document order number: 10 Product specification PCA9540 2 C patent All rights reserved. Printed in U.S.A. Date of release: 02-00 9397 750 06882 ...

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