X9119TV14IZ-2.7 datasheet(3/18 Pages) INTERSIL

Part #	X9119TV14IZ-2.7

Description	Single Supply/Low Power/1024-Tap/2-Wire Bus

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Manufacturer	INTERSIL [Intersil Corporation]

Direct Link	http://www.intersil.com/cda/home

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3 / 18 page

3

FN8162.2

September 15, 2005

PIN CONFIGURATION

PIN ASSIGNMENTS

PIN DESCRIPTIONS

Bus Interface Pins

SERIAL DATA INPUT/OUTPUT (SDA)

The SDA is a bidirectional serial data input/output pin

for a 2-wire slave device and is used to transfer data

into and out of the device. It receives device address,

opcode, wiper register address and data sent from an

2-wire master at the rising edge of the serial clock

SCL, and it shifts out data after each falling edge of

the serial clock SCL.

It is an open drain output and may be wire-ORed with

any number of open drain or open collector outputs.

An open drain output requires the use of a pull-up

resistor. For selecting typical values, refer to the

guidelines for calculating typical values on the bus

pull-up resistors graph.

SERIAL CLOCK (SCL)

This input is used by 2-wire master to supply 2-wire

serial clock to the X9119.

DEVICE ADDRESS (A2–A0)

The Address inputs are used to set the least

significant 3 bits of the 8-bit slave address. A match in

the slave address serial data stream must be made

with

the

Address

input

in

order

to

initiate

communication with the X9119. A maximum of 8

devices may occupy the 2-wire serial bus.

Hardware Write Protect Input (WP)

The WP pin when LOW prevents nonvolatile writes to

the Data Registers.

Potentiometer Pins

RH, RL

The RH and RL pins are equivalent to the terminal

connections on a mechanical potentiometer.

RW

The wiper pin are equivalent to the wiper terminal of a

mechanical potentiometer.

Bias Supply Pins

SYSTEM SUPPLY VOLTAGE (VCC) AND SUPPLY

GROUND (VSS)

The VCC pin is the system supply voltage. The VSS

pin is the system ground.

Other Pins

NO CONNECT

No connect pins should be left open. These pins are

used for Intersil manufacturing and testing purposes.

PRINCIPLES OF OPERATION

The X9119 is an integrated microcircuit incorporating

a resistor array and its associated registers and

counters and the serial interface logic providing direct

communication between the host and the digitally

controlled potentiometer. This section provides detail

description of the following:

– Resistor Array Description

– Serial Interface Description

– Instruction and Register Description

(TSSOP)

Symbol

Function

1

NC

No Connect

2

A0

Device Address for 2-wire bus

3

NC

No Connect

4

A2

Device Address for 2-wire bus

5

SCL

Serial Clock for 2-wire bus

6

SDA

Serial Data Input/Output for 2-wire bus

7VSS

System Ground

8WP

Hardware Write Protect

9

A1

Device Address for 2-wire bus

10

NC

No Connect

11

RW

Wiper terminal of the Potentiometer

12

RH

High terminal of the Potentiometer

13

RL

Low terminal of the Potentiometer

14

VCC

System Supply Voltage

VCC

RL

VSS

1

2

3

4

5

6

7

8

14

13

12

11

10

9

NC

RW

A2

A1

TSSOP

RH

X9119

A0

NC

SDA

NC

SCL

WP

X9119

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X9119TV14IZ-2.7 Datasheet(PDF) 3 Page - Intersil Corporation

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