DS1858 datasheet(8/22 Pages) MAXIM

Part #	DS1858

Description	Dual Temperature-Controlled Resistors with Three Monitors

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Manufacturer	MAXIM [Maxim Integrated Products]

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Dual Temperature-Controlled Resistors with

Three Monitors

8

_____________________________________________________________________

DEVICE

ADDRESS

AD (AUXILIARY DEVICE ENABLE A0h)

MD (MAIN DEVICE ENABLE)

DEVICE ADDRESS

ADDRESS

R/W

TxF

DATA BUS

R/W

TxF

RxL

LOS

ADEN ADFIX

SDA

SCL

IN1

OUT1

2-WIRE

INTERFACE

MINT

INV1

Tx FAULT

IN2

MON2

MON1

MON3

VCC

GND

WPEN

OUT2

INV2

EEPROM

128 x 8 BIT

00h-7Fh

STANDARDS

PROT

AUX

AD

ADDRESS

TABLE

SELECT

R/W

EEPROM

72 x 8 BIT

80h-C7h

TABLE 02

RESISTOR 0

LOOK-UP

TABLE

PROT

MAIN

MD

EEPROM

96 x 8 BIT

00h-5Fh

LIMITS

SRAM

32 x 8 BIT

60h-7Fh

NOT PROTECTED

PROT

MAIN

MD

TEMP INDEX

ALARM FLAGS

MUX

CTRL

MEASUREMENT

ADDRESS

TABLE

SELECT

R/W

EEPROM

72 x 8 BIT

80h-C7h

TABLE 03

RESISTOR 1

LOOK-UP

TABLE

PROT

MAIN

MD

TEMP INDEX

RWPEN

MONITORS LIMIT

HIGH

MONITORS LIMIT

LOW

TABLE SELECT

TEMP INDEX

MINT (BIT)

INTERNAL

TEMP

VCC

MUX

A/D

12-BIT

A/D

CTRL

VCC

PROT AUX

PROT MAIN

MPEN

APEN

COMPARATOR

MEASUREMENT

ALARM FLAGS

MONITORS LIMIT LOW

MONITORS LIMIT HIGH

COMP CTRL

INTERRUPT

MINT

TABLE 01

EEPROM

16 x 8 BIT

80h-8Fh

VENDOR

PROT

MAIN

MD

R/W

DEVICE ADDRESS

ADDRESS

TABLE SELECT

MASKING (TMP, VCC, MON1, MON2, MON3)

ADFIX (BIT)

ADEN (BIT)

MPEN (BIT)

APEN (BIT)

INV2 (BIT)

INV1 (BIT)

RESISTOR 0

50k

Ω FULL SCALE

256 POSITIONS

L0

H0

RESISTOR 1

50k

Ω FULL SCALE

256 POSITIONS

L1

H1

Figure 1. DS1858 Block Diagram

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DS1858 Datasheet(PDF) 8 Page - Maxim Integrated Products

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