PCA9546 Philips Semiconductors, PCA9546 Datasheet

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PCA9546

Manufacturer Part Number
PCA9546
Description
4-channel I2C switch with reset
Manufacturer
Philips Semiconductors
Datasheet

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Product data sheet
Supersedes data of 2002 Feb 19
PCA9546
4-channel I
2
C switch with reset
INTEGRATED CIRCUITS
2004 Sep 30

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PCA9546 Summary of contents

Page 1

... PCA9546 2 4-channel I C switch with reset Product data sheet Supersedes data of 2002 Feb 19 INTEGRATED CIRCUITS 2004 Sep 30 ...

Page 2

... Any individual SCx/SDx channel or combination of channels can be selected, determined by the contents of the programmable Control Register. An active-LOW reset input allows the PCA9546 to recover from a situation where one of the downstream I state. Pulling the RESET pin LOW resets the I causes all the channels to be deselected as does the internal power on reset function ...

Page 3

... PIN NUMBER SW00913 Product data sheet PCA9546 SYMBOL FUNCTION A0 Address input 0 A1 Address input 1 RESET Active LOW reset input SD0 Serial data 0 SC0 Serial clock 0 SD1 Serial data 1 SC1 Serial clock 1 V Supply ground SS ...

Page 4

... I C switch with reset BLOCK DIAGRAM PCA9546 SC0 SC1 SC2 SC3 SD0 SD1 SD2 SD3 RESET CIRCUIT RESET SCL INPUT FILTER SDA 2004 Sep 30 SWITCH CONTROL LOGIC 2 I C-BUS CONTROL Figure 2. Block diagram 4 Product data sheet PCA9546 SW00914 ...

Page 5

... CONTROL REGISTER Following the successful acknowledgement of the slave address, the bus master will send a byte to the PCA9546, which will be stored in the control register. If multiple bytes are received by the PCA9546, it will save the last byte received. This register can be ...

Page 6

... V and 2.7 V, then V 2 effectively clamp the downstream bus voltages. Looking at Figure 5, we see that V PCA9546 supply voltage is 3 lower so the PCA9546 supply voltage could be set to 3.3 V. Pull-up resistors can then be used to bring the bus voltages to their appropriate levels (see Figure 12). ...

Page 7

... Figure 8). SW00363 Figure 7. Definition of start and stop conditions SLAVE MASTER TRANSMITTER/ TRANSMITTER RECEIVER Figure 8. System configuration 7 Product data sheet PCA9546 SDA SCL P STOP condition SW00365 MASTER TRANSMITTER/ MULTIPLEXER ...

Page 8

... Figure 10. WRITE control register CONTROL REGISTER R/W acknowledge from slave Figure 11. READ control register 8 Product data sheet PCA9546 9 clock pulse for acknowledgement SW00368 acknowledge from slave SW00917 last byte acknowledge ...

Page 9

... SCL 2 I C/SMBus MASTER 2004 Sep 3 SDA SD0 SCL SC0 RESET SD1 SC1 SD2 SC2 A2 A1 SD3 A0 SC3 V SS PCA9546 Figure 12. Typical application 9 Product data sheet PCA9546 V = 2.7 – 5.5 V CHANNEL 2.7 – 5.5 V CHANNEL 2.7 – 5.5 V CHANNEL 2.7 – 5.5 V CHANNEL 3 SW00919 ...

Page 10

... –100 A swin DD swout 2 2 –100 A swin DD swout Product data sheet PCA9546 RATING UNIT –0.5 to +7.0 V –0 100 mA 100 mA 400 mW –60 to +150 C – LIMITS UNIT UNIT ...

Page 11

... 5 –100 A swin DD swout 4 5 –100 A swin DD swout Product data sheet PCA9546 = 2 3 LIMITS UNIT UNIT MIN TYP MAX 3.6 — 5.5 V — 570 600 A — 250 300 A — 1.7 2.1 V –0.5 — 0. 0.7V — ...

Page 12

... R and the 15 pF load capacitance HD;DAT HIGH SU;DAT Sr 2 Figure 13. Definition of timing on the I C-bus 12 Product data sheet PCA9546 FAST-MODE 2 I C-BUS UNIT MAX MIN MAX 1 1 0.3 — 0.3 ns 100 0 400 kHz — 1.3 — s — ...

Page 13

... Philips Semiconductors 2 4-channel I C switch with reset SO16: plastic small outline package; 16 leads; body width 3.9 mm 2004 Sep 30 13 Product data sheet PCA9546 SOT109-1 ...

Page 14

... Philips Semiconductors 2 4-channel I C switch with reset TSSOP16: plastic thin shrink small outline package; 16 leads; body width 4.4 mm 2004 Sep 30 14 Product data sheet PCA9546 SOT403-1 ...

Page 15

... Philips Semiconductors 2 4-channel I C switch with reset HVQFN16: plastic thermal enhanced very thin quad flat package; no leads; 16 terminals; body 0.85 mm 2004 Sep 30 15 Product data sheet PCA9546 SOT629-1 ...

Page 16

... Table 1, “Control register; Write—Channel Selection / Read—Channel Status”: add ‘No channel selected; power-up/reset default state’ row to bottom of table. _1 20020219 Product data (9397 750 09459). ECN 853-2317 27757 of 19 February 2002. 2004 Sep 30 16 Product data sheet PCA9546 ...

Page 17

... Relevant changes will be communicated via a Customer Product/Process Change Notification (CPCN). Fax: + 24825 Document number: 17 Product data sheet PCA9546 2 C patent Koninklijke Philips Electronics N.V. 2004 All rights reserved. Published in the U.S.A. Date of release: 09-04 ...

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