TCA4311A

SCPS226 – JANUARY 2011

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Table 1. ORDERING INFORMATION

ORDERABLE PART NUMBER

TOP-SIDE MARKING

Tube

TCA4311AD

PREVIEW

SOIC – D

–40°C to 85°C

Tape and reel

TCA4311ADR

PREVIEW

MSOP – DGK

Tape and reel

TCA4311ADGKR

6KS

(1)

Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.

(2)

For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI

website at www.ti.com.

TERMINAL FUNCTIONS

SOIC (D) OR MSOP (DGK)

PACKAGE

DESCRIPTION

PIN NUMBER

NAME

Active-high chip enable pin. If EN is low, the TCA4311A is in a low current (<1 mA) mode. It also

disables the rise-time accelerators, disables the bus precharge circuitry, drives READY low, isolates

1

EN

2

SCLOUT

Serial clock output. Connect this pin to the SCL bus on the card.

3

SCLIN

Serial clock input. Connect this pin to the SCL bus on the backplane.

4

GND

Supply ground

Connection flag/rise-time accelerator control. READY is low when either EN is low or the start-up

5

READY

sequence described in the operation section has not been completed. READY goes high when EN is

high and start-up is complete. Connect a 10-k

6

SDAIN

Serial data input. Connect this pin to the SDA bus on the backplane.

7

SDAOUT

Serial data output. Connect this pin to the SDA bus on the card.

Supply power. Main input power supply from backplane. This is the supply voltage for the devices on

8

and SCLOUT) to this pin. Place a bypass capacitor of at least 0.01 mF close to this pin for best results.

2

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