MAX6575L Ver la hoja de datos (PDF) - Maxim Integrated

Número de pieza

componentes Descripción

Fabricante

MAX6575L

SOT Temperature Sensor with Multidrop Single-Wire Digital Interface

Maxim Integrated 

SOT Temperature Sensor with

Multidrop Single-Wire Digital Interface

+2.7V TO +5.5V

+2.7V TO +5.5V

40µs/°K

0.1µF

VDD

TS1 MAX6575L I/O

TS0

T1

GND

80µs/°K

0.1µF

VDD

TS1 MAX6575L I/O

TS0

T2

GND

VCC

OPEN: T1

CLOSED: T2

10k

VCC

10k

P1.0

P1.1

P3.7

P1.2

8051

P1.3

P1.4

P1.5

P1.6

P1.7

P3.5

X1

GND

X2

470Ω (8)

22pF

12MHz

22pF

Figure 2. Interfacing Multiple Devices with a Microcontroller

Interfacing Multiple Devices

with a Microcontroller

Figure 2 shows how to interface multiple MAX6575L/H

devices with an 8051 microcontroller. The first device,

T1, is configured for a timeout multiplier of 40µs/°K,

while the second device, T2, is configured for a timeout

multiplier of 80µs/°K to avoid overlap. The microcon-

troller takes in temperature values from both sensors,

T1 and T2, on a single port pin, P3.7. The microcon-

troller displays five times the temperature in degrees

Celsius in binary on Port 1. A switch connected to a

pull-up resistor at Port 3.5 selects which temperature is

displayed: open = T1, closed = T2. Code is provided

for this application as Listing 1.

6 _______________________________________________________________________________________

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