DS620 Digital Thermometer and Thermostat

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PIN DESCRIPTION

PIN

NAME

FUNCTION

1

SDA

Data Input/Output Pin

2

SCL

Clock Input Pin

for 2-wire serial communication.

3

PO

Programmable Output Pin.

4

GND

Ground Pin.

5

A2

Address Input Pin.

6

A1

Address Input Pin.

Also serves as an input to trigger one-shot conversions during standalone use.

7

A0

Address Input Pin.

8

Supply Voltage Pin.

+1.7V to +3.5V power supply pin.

PAD

PAD.

temperature into the package. Connecting PAD to a ground plane can assist in properly measuring the

temperature of the circuit board.

Figure 1. Block Diagram

Memory Array

2-Wire Interface

Charge Pump

Temp. Core

Bandgap

ADC

POR

Digital Control

PO Pin

Control

Address Counter

Address/Command

Decode

Conversion Control

Configuration Register

TH, TL Registers

Digital Comparator

Temperature Register

User EEPROM Registers

Temperature Counter

Memory Interface Logic

PO

SCL

SDA

A2

A1

A0

DS620