DS1855

3 of 20

DS1855 BLOCK DIAGRAM Figure 1

Up to eight DS1855s can be installed on a single 2-wire bus. Access to an individual device is achieved

by using a device address that is determined by the logic levels of address pins A0 through A2.

Additionally, the DS1855 will operate from 3V or 5V supplies. Three package options are available: 14-

pin TSSOP, 16-ball STPBGA, and flip-chip package.

GND

SDA

SCL

WP

A0

A1

A2

H0

W0

L0

H1

W1

L1

248 BYTES

EEPROM

MEMORY

1 BYTE WIPER

SETTING

POT 0

1 BYTE WIPER

SETTING

POT 1

CONFIGURATION

BYTE

LOCK BYTE

LOCK BYTE

RESERVED

CONTROL

DATA

POTENTIOMETER 0

2-WIRE

INTERFACE

POTENTIOMETER 1

100-

Position

Pot

256-

Position

Pot