DS1626 Dallas, DS1626 Datasheet - Page 2

• Manufacturer Part Number: DS1626
• Description: High-Precision 3-Wire Digital Thermometer and Thermostat
• Manufacturer: Dallas

CLK/ CNV
Table 2. DETAILED PIN DESCRIPTION
Table 3. DS1626/DS1726 REGISTER SUMMARY
Figure 1. DS1626/DS1726 FUNCTIONAL DIAGRAM
ORDERING INFORMATION
Temperature
(Read Only)
T
(Read/Write)
T
(Read/Write)
Configuration
(Various Bits are
Read/Write and Read
Only—See Table 5)
PIN
DS1626U
DS1626U/T&R
DS1726U
DS1726U/T&R
REGISTER NAME
RST
H
L
GND
1
2
3
4
5
6
7
8
(USER ACCESS)
SDA
V
DD
PART
CLK/CNV
SYMBOL
T
GND
T
T
RST
V
DQ
HIGH
COM
LOW
DD
I/O CONTROL
ADDRESS
Data Input/Output Pin (Tri-State) for 3-Wire Serial Communication
Clock Input Pin for 3-Wire Serial Communication. Controls temperature
measurements when the DS1626/DS1726 is configured as a stand-alone thermostat
Reset Input Pin for 3-Wire Serial Communication
Ground Pin
Thermostat Output Pin (Push-Pull) with Programmable Hysteresis
Thermostat Output Pin (Push-Pull) with T
Thermostat Output Pin (Push-Pull) with T
Supply Voltage. +2.7V to +5.5V Input Power Pin
and
PACKAGE MARKING
12 Bits
12 Bits
12 Bits
1 Byte
SIZE
D1626
D1626
D1726
D1726
MEMORY
SRAM and
EEPROM
EEPROM
EEPROM
SRAM
TYPE
CONFIGURATION REGISTER AND CONTROL LOGIC
TEMPERATURE REGISTER
TEMPERATURE SENSOR AND DS ADC
T
T
H
L
REGISTER
REGISTER
2 of 13
Measured Temperature (Two’s Complement)
Power-Up/POR State: -60ºC (1100 0100 0000)
Upper Alarm Trip Point (Two’s Complement)
Power-Up/POR State: User-Defined.
Initial State from Factory: +15°C (0000 1111 0000)
Lower Alarm Trip Point (Two’s Complement)
Power-Up/POR State: User-Defined.
Initial State from Factory: +10°C (0000 1010 0000)
Configuration and Status Information (Unsigned)
4MSbs = SRAM and 4LSbs = EEPROM
Power-Up/POR State: 1000XXXX (XXXX = User-
Defined)
8-Pin mSOP
8-Pin mSOP, 3000-Piece Tape-and-Reel
8-Pin mSOP
8-Pin mSOP, 3000-Piece Tape-and-Reel
FUNCTION
AND POWER-UP/POR STATE
REGISTER CONTENTS
L
H
Trip Point
Trip Point
COMPARATOR/LOGIC
DESCRIPTION
DIGITAL
T
T
T
COM
HIGH
LOW