PCA9510D Просмотр технического описания (PDF) - Philips Electronics

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PCA9510D

Hot swappable I2C and SMBus bus buffer

Philips Electronics 

Philips Semiconductors

Hot swappable I2C and SMBus bus buffer

Product data sheet

PCA9510; PCA9511

PIN CONFIGURATION

ENABLE 1

SCLOUT 2

SCLIN 3

GND 4

TOP VIEW

8 VCC

7 SDAOUT

6 SDAIN

5 READY

SW01045

Figure 1. Pin configuration.

PIN DESCRIPTION

PIN SYMBOL DESCRIPTION

1

ENABLE Chip enable pin. Grounding this pin puts the

part in a low current (<1 µA) mode. It also

disables the rise time accelerators, isolates

SDAIN from SDAOUT and isolates SCLIN

from SCLOUT.

2

SCLOUT Serial clock output to and from the SCL bus

on the card.

3

SCLIN

Serial clock input to and from the SCL bus

on the backplane.

4

GND

Ground. Connect this pin to a ground plane

for best results.

5

READY This is an open-drain output which pulls

LOW when SDAIN and SCLIN are

disconnected from SDAOUT and SCLOUT,

and turns off when the two sides are

connected.

6

SDAIN Serial data input to and from the SDA bus on

the backplane.

7

SDAOUT Serial data output to and from the SDA bus

on the card.

8

VCC

Power supply.

FEATURE SELECTION CHART

FEATURES

Idle detect

High impedance SDA, SCL pins for VCC = 0 V

Rise time accelerator circuitry on all SDA and SCL lines

Rise time accelerator circuitry hardware disable pin for lightly loaded

systems

Rise time accelerator threshold 0.8 V vs 0.6 V improves noise margin

Ready open drain output

Two VCC pins to support 5 V to 3.3 V level translation with improved noise

margins

1 V precharge on all SDA and SCL lines

92 µA current source on SCLIN and SDAIN for PICMG applications

PCA9510

Yes

Yes

—

PCA9511

Yes

Yes

Yes

PCA9512

Yes

Yes

Yes

PCA9513

Yes

Yes

Yes

PCA9514

Yes

Yes

Yes

—

—

Yes

—

—

—

—

—

Yes

Yes

Yes

Yes

—

Yes

Yes

—

—

Yes

—

—

IN only

Yes

Yes

—

—

—

—

—

Yes

—

2004 Oct 05

3

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