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DS1626/DS1726

2 of 13

ORDERING INFORMATION

PART PACKAGE MARKING DESCRIPTION

DS1626U D1626

8-Pin mSOP

DS1626U/T&R D1626

8-Pin mSOP, 3000-Piece Tape-and-Reel

DS1726U D1726

8-Pin mSOP

DS1726U/T&R D1726

8-Pin mSOP, 3000-Piece Tape-and-Reel

Table 2. DETAILED PIN DESCRIPTION

PIN SYMBOL FUNCTION

1DQData Input/Output Pin (Tri-State) for 3-Wire Serial Communication

2CLK/CNV

Clock Input Pin for 3-Wire Serial Communication. Controls temperature

measurements when the DS1626/DS1726 is configured as a stand-alone thermostat

RST

Reset Input Pin for 3-Wire Serial Communication

4 GND

Ground Pin

COM

Thermostat Output Pin (Push-Pull) with Programmable Hysteresis

LOW

Thermostat Output Pin (Push-Pull) with T

Trip Point

HIGH

Thermostat Output Pin (Push-Pull) with T

Trip Point

Supply Voltage. +2.7V to +5.5V Input Power Pin

Table 3. DS1626/DS1726 REGISTER SUMMARY

(USER ACCESS)

SIZE

MEMORY

TYPE

AND POWER-UP/POR STATE

Temperature

(Read Only)

12 Bits SRAM

Measured Temperature (Two’s Complement)

Power-Up/POR State: -60ºC (1100 0100 0000)

(Read/Write)

12 Bits EEPROM

Upper Alarm Trip Point (Two’s Complement)

Power-Up/POR State: User-Defined.

Initial State from Factory: +15°C (0000 1111 0000)

(Read/Write)

12 Bits EEPROM

Lower Alarm Trip Point (Two’s Complement)

Power-Up/POR State: User-Defined.

Initial State from Factory: +10°C (0000 1010 0000)

Configuration

(Various Bits are

Read/Write and Read

Only—See Table 5)

1 Byte

SRAM and

EEPROM

Configuration and Status Information (Unsigned)

4MSbs = SRAM and 4LSbs = EEPROM

Power-Up/POR State: 1000XXXX (XXXX = User-

Defined)

Figure 1. DS1626/DS1726 FUNCTIONAL DIAGRAM

COM

HIGH

LOW

DIGITAL

COMPARATOR/LOGIC

CONFIGURATION REGISTER AND CONTROL LOGIC

ADDRESS

and

I/O CONTROL

CLK/

GND

TEMPERATURE SENSOR AND DS ADC

TEMPERATURE REGISTER

1 2 3 4 5 6 7 ... 12 13

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