Philips Semiconductors

Product data sheet

PCA9512

2004 Oct 05

8

C1

0.01

µF

R4

10 k

Ω

R5

10 k

Ω

I/O PERIPHERAL CARD 1

R6

10 k

Ω

R3 5.1

Ω

C2

0.01

µF

SDAIN

SCLIN

SDAOUT

SCLOUT

ACC

GND

CARD1_SDA

CARD1_SCL

PCA9512

C3

0.01

µF

R8

10 k

Ω

R9

10 k

Ω

I/O PERIPHERAL CARD 2

R10

10 k

Ω

R4 5.1

Ω

C4

0.01

µF

SDAIN

SCLIN

SDAOUT

SCLOUT

ACC

GND

CARD2_SDA

CARD2_SCL

PCA9512

R1

10 k

Ω

R2

10 k

Ω

SDA

SCL

BACKPLANE

BACKPLANE

CONNECTOR

SW02118

NOTE: Application assumes bus capacitance within “proper operation” region of Figures 5 and 6.

Figure 8. Hot swapping multiple I/O cards into a backplane using the PCA9512 with a custom connector

C1

0.01

µF

R3

10 k

Ω

R2

10 k

Ω

SDAIN

SCLIN

SDAOUT

SCLOUT

ACC

GND

CARD_SDA

CARD_SCL

PCA9512

C2

0.01

µF

R4

10 k

Ω

R1

10 k

Ω

SCL

SCL

SW02119

NOTE: Application assumes bus capacitance within “proper operation” region of Figures 5 and 6.

Figure 9. 5 V to 3.3 V level translator and bus buffer