MAXIM DS1626, DS1726 Technical data

RST

www.maxim-ic.com

DESCRIPTION

The DS1626 and DS1726 digital thermometers/thermostats provide temperature measurements and stand-alone thermostat capability over a -55°C to +125°C range. The DS1626 offers ±0.5°C accuracy from 0°C to +70°C and the DS1726 has ±1°C accuracy from

-10°C to +85°C. The resolution of the measured temperature is user selectable from 9 to 12 bits. Communication with the DS1626 and DS1726 is achieved through a 3-wire serial bus.

The DS1626 and DS1726 offer thermostatic functionality with three dedicated thermostat outputs (T

HIGH

, T

, and T

LOW

), and

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overtemperature (TH) and undertemperature (TL) user-programmable thresholds stored in on-chip EEPROM. For stand-alone thermostat operation, TH and TL can be programmed prior to installation, and the DS1626/DS1726 can be configured to automatically begin taking temperature measurements at power-up. Table 1 summarizes the user-accessible registers. Figure 1 shows a functional diagram.

APPLICATIONS

Thermostatic Controls Industrial Controls Consumer Products Any Space-Constrained Thermally Sensitive

Application

High-Precision 3-Wire Digital

Thermometer and Thermostat

FEATURES

 Temperature Measurements Require No

External Components

 Measure Temperatures from -55°C to

+125°C (-67°F to +257°F)

 DS1626: ±0.5°C Accuracy from 0°C to

+70°C

 DS1726: ±1°C Accuracy from -10°C to

+85°C

 Output Resolution is User Selectable to 9,

10, 11, or 12 Bits

 Wide Power-Supply Range (2.7V to 5.5V)  Convert Temperature to Digital Word in

750ms (max)

 Stand-Alone Thermostat Capability  Thermostatic Settings are User Definable and

Nonvolatile (NV)

 Data is Read/Written Through a 3-Wire

Serial Interface

 Available in 8-Pin μSOP Package

PIN CONFIGURATION

TOP VIEW

CLK/CN

GND

ORDERING INFORMATION

PART TEMP RANGE PIN-PACKAGE TOP MARK

DS1626U -55°C to +125°C

DS1626U+ -55°C to +125°C DS1626U/T&R -55°C to +125°C DS1626U+T&R -55°C to +125°C DS1726U -55°C to +125°C DS1726U+ -55°C to +125°C DS1726U/T&R -55°C to +125°C DS1726U+T&R -55°C to +125°C

+Denotes a lead-free package. A “+” symbol will also be marked on the package near the Pin 1 indicator. T&R = Tape and reel.

8 μSOP 8 μSOP 8 μSOP, 3000-Piece 8 μSOP, 3000-Piece 8 μSOP 8 μSOP 8 μSOP, 3000-Piece 8 μSOP, 3000-Piece

DS1626/DS1726

VDD

HIGH

LOW

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1626 1626 1626 1626 1726 1726 1726 1726

2 3

DS1626 DS1726

SOP

1 of 12 REV: 071107

CNV

PIN DESCRIPTION

PIN NAME FUNCTION

1 DQ Data Input/Output Pin (Tri-State) for 3-Wire Serial Communication 2 3

CLK/CNV

RST

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 4 GND Ground Pin 5 T 6 T 7 T

Thermostat Output Pin (Push-Pull) with Programmable Hysteresis

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Thermostat Output Pin (Push-Pull) with TL Trip Point

LOW

Thermostat Output Pin (Push-Pull) with TH Trip Point

HIGH

8 VDD Supply Voltage. +2.7V to +5.5V input power pin.

Table 1. DS1626/DS1726 REGISTER SUMMARY

(USER ACCESS)

Temperature

(Read Only)

(Read/Write)

Configuration

(Various Bits are

Read/Write and Read

Only—See Table 3)

SIZE

12 Bits SRAM

12 Bits EEPROM

1 Byte

MEMORY

TYPE

SRAM and

EEPROM

AND POWER-UP/POR STATE

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)

Figure 1. DS1626/DS1726 FUNCTIONAL DIAGRAM

VDD

CONFIGURATION REGISTER AND CONTROL LOGIC

CLK/

ADDRESS

and

I/O CONTROL

SDA

TEMPERATURE SENSOR AND ΔΣ ADC

TEMPERATURE REGISTER

COMPARATOR/LOGIC

TL REGISTER

DIGITAL

DS1626/DS1726

T T

LOW

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DS1626/DS1726

ABSOLUTE MAXIMUM RATINGS

Voltage Range on Any Pin Relative to Ground...................................................................-0.5V to +6.0V

Operating Temperature Range.............................................................................................-55°C to +125°C

Storage Temperature Range ................................................................................................-55°C to +125°C

Solder Dip Temperature (10s).............................................................................................+260°C

Reflow Oven Temperature ..................................................................................................+220°C

These are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operation sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability.

DC ELECTRICAL CHARACTERISTICS

= 2.7V to 5.5V, TA = -55°C to +125°C.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Supply Voltage VDD DS1626

Thermometer Error

ERR

(Note 2)

DS1726 Thermometer

ERR

Error (Note 2)

Low-Level Input Voltage High-Level Input Voltage Input Current each Input Pin

Active Supply Current (Note 3)

VIL (Note 1) -0.5 0.3 x V

VIH (Note 1) 0.7 x V

0.4 < V

Input Resistance RI Standby Supply

Current

STBY

VOH 1mA source current 2.4 THIGH, TLOW, TCOM, DQ Output Logic

Voltages (Note 1) Thermal Drift

0°C to +70°C (Note 3) 1.5 µA

4mA sink current 0.4

(Note 1) 2.7 5.5 V 0°C to +70°C,

3.0V ≤ V

≤ 5.5V

0°C to +70°C,

2.7V ≤ V

< 3.0V

-55°C to +125°C

-10°C to +85°C,

3.0V ≤ V

≤ 5.5V

-10°C to +85°C,

2.7V ≤ V

< 3.0V

±0.5

±1.25

±1.5

°C

±2 ±1

°C

-55°C to +125°C ±2 V

< 0.9 x VDD -10 +10 µA

I/O

Temperature conversion

-55°C to +85°C

Temperature conversion +85°C to +125°C

+ 0.3 V

1.25

E2 write 400 µA RST to GND DQ, CLK to V

MΩ

(Note 4)

±0.2 °C

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DS1626/DS1726

EEPROM AC ELECTRICAL CHARACTERISTICS

= 2.7V to 5.5V, TA = -55°C to +125°C.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

EEPROM Write Cycle Time twr 4 10 ms EEPROM Writes N EEPROM Data Retention t

-55°C to +55°C 50k Writes

EEWR

-55°C to +55°C 10 Years

EEDR

AC ELECTRICAL CHARACTERISTICS

= 2.7V to 5.5V, TA = -55°C to +125°C.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

9 bits 93.75

Temperature Conversion Time tTC

10 bits 187.5 11 bits 375

12 bits 750 Data In to Clock Setup tDC (Note 5) 35 ns Clock to Data In Hold t Clock to Data Out Delay t

(Note 5) 40 ns

CDH

(Notes 5, 6) 150 ns

CDD

Clock Low/High Time tCL, tCH (Note 5) 285 ns Clock Frequency f

(Note 5) 0 1.75 MHz

CLK

Clock Rise/Fall Time tR, tF (Note 5) 500 ns RST to Clock Setup Clock to RST Hold RST Inactive Time Clock High to I/O Hi-Z t

RST Low to I/O Hi-Z CNV Pulse Width

I/O Capacitance C

tRC (Note 5) 100 ns

(Note 5) 40 ns

CRH

tRI (Note 7) 125 ns

(Note 5) 50 ns

CDZ

(Note 5) 50 ns

RDZ

(Note 8) 250ns 500ms

CNV

I/O

10 pF Input Capacitance CI 5 pF

NOTES:

1) All voltages are referenced to ground.

2) See Figure 2 for TYPICAL OPERATING CURVES.

3) I

4) Drift data is based on a 1000hr stress test at +125°C with V

5) See Timing Diagrams in Figure 3. All timing is referenced to 0.7 x V

6) Load capacitance = 50pF.

7) tRI must be 10ms minimum following any write command that involves the E2 memory.

8) 250ns is the guaranteed minimum pulse width for a conversion to start, however, a smaller pulse

, IDD specified with DQ, CLK/CNV = VDD and RST = GND.

STBY

width may start a conversion.

= 5.5V.

and 0.3 x VDD.

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Figure 2. TYPICAL OPERATING CURVES

0.8

0.6

0.4

0.2

+3σ

-0.2

-0.4

ERROR °C

-0.6

-3σ

-0.8

-1 0 10203040506070

REFERENCE TEMPERATURE (°C)

DS1626

MEAN

Figure 3. TIMING DIAGRAMS

a) Read Timing

tRC

DS1726

0.8

0.6

0.4

0.2 0

-0.2

-0.4

-0.6

ERROR (°C)

-0.8

MEAN

-1

-10 0 10 20 30 40 50 60 70 80

REFERENCE TEMPERATURE (°C)

CRH

DS1626/DS1726

+3σ

-3σ

b) Write Timing

tRC

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tRI

CRH

DS1626/DS1726

OPERATION—MEASURING TEMPERATURE

The DS1626/DS1726 measure temperature using a bandgap-based temperature sensor. A delta-sigma analog-to-digital converter (ADC) converts the measured temperature to a digital value that is calibrated in degrees Celsius; for Fahrenheit applications a lookup table or conversion routine must be used. Communication with the DS1626/DS1726 is achieved through a 3-wire serial interface, and all data is transmitted LSb first.

The DS1626/DS1726 can be programmed to take continuous temperature measurements (continuous conversion mode) or to take single temperature measurements on command (one-shot mode). The measurement mode is programmed by the 1SHOT bit in the configuration register as explained in the CONFIGURATION REGISTER section of this data sheet. The 1SHOT bit is stored in EEPROM, so it can be programmed prior to installation if desired. In continuous conversion mode, when a Start Convert T command is issued the DS1626/DS1726 perform consecutive temperature measurements until a Stop Convert T command is issued. In one-shot mode, the Start Convert T command causes one temperature measurement to be taken and then the DS1626/DS1726 return to a low-power idle state.

The resolution of the DS1626/DS1726 digital temperature data is user-configurable to 9, 10, 11, or 12 bits, corresponding to temperature increments of 0.5°C, 0.25°C, 0.125°C, and 0.0625°C, respectively. The resolution is set by the EEPROM R0 and R1 bits in the configuration register. Note that the conversion time doubles for each additional bit of resolution.

After each temperature measurement and analog-to-digital conversion, the DS1626/DS1726 store the measured temperature as a two’s complement number in the 12-bit temperature register (see Figure 4). The sign bit (S) indicates if the temperature is positive or negative: for positive numbers S = 0 and for negative numbers S = 1. The Read Temperature command provides user access to the temperature register.

When the DS1626/DS1726 are configured for 12-bit resolution, all 12 bits of the temperature register will contain temperature data. For 11-bit resolution, the 11 MSbs (bits 11 through 1) of the temperature register will contain data and bit 0 will read out as 0. Likewise, for 10-bit resolution, the 10 MSbs (bits 11 through 2) will contain data, and for 9-bit the 9 MSbs (bits 11 through 3) will contain data, and all unused LSbs will contain 0s. Since the DS1626/DS1726 transmit data LSb first, when reading data from the temperature register, all 12 bits must be read in order to receive all MSbs of the measured data, regardless of the conversion resolution. Table 2 gives examples of 12-bit resolution digital output data and the corresponding temperatures.

Figure 4. TEMPERATURE, TH, and TL REGISTER FORMAT

BIT 11 BIT 10 BIT 9 BIT 8 BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0

S 26 2

-1

-2

-3

-4

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DS1626/DS1726

Table 2. 12-BIT RESOLUTION TEMPERATURE/DATA RELATIONSHIP

TEMPERATURE (°C)

DIGITAL OUTPUT

(BINARY)

DIGITAL OUTPUT

(HEX)

+125 0111 1101 0000 7D0h

+25.0625 0001 1001 0001 191h

+10.125 0000 1010 0010 0A2h

+0.5 0000 0000 1000 008h

0 0000 0000 0000 000h

-0.5 1111 1111 1000 FF8h

-10.125 1111 0101 1110 F5Eh

-25.0625 1110 0110 1111 E6Fh

-55 1100 1001 0000 C90h

OPERATION—THERMOSTAT FUNCTION

The DS1626/DS1726 thermostat outputs (T conversion and remain at the updated values until the next conversion completes. T the measured temperature is higher than or equal to the value stored in the TH register, and T asserted when the temperature is equal to or falls below the value in the TL register (see Figure 5). T uses both TH and TL to provide programmable hysteresis: when the measured temperature equals or exceeds TH, T

is asserted and it remains asserted until the temperature falls to a value equal to or

COM

below TL. All three thermostat outputs are active-high outputs.

HIGH

, T

LOW

, and T

) are updated after every temperature

COM

HIGH is

asserted when

LOW

COM

The Write TH and Write TL commands are used to program the 12-bit TH and TL registers with userdefined two’s complement values. The MSb (bit 11) of each register contains the two’s complement sign bit (S). For the T

thermostat output to function correctly, the TL value must be less than the TH value.

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Any unused LSbs in the TH and TL registers are forced to 0 regardless of the data written to those bits. The unused LSbs are determined by the conversion resolution set by R1 and R0 in the configuration register. Therefore, for 9-bit conversions bits 2 through 0 will be 0, for 10-bit conversions bit 1 and bit 0 will be 0, and for 11-bit conversions bit 0 will be 0. All bits are used for 12-bit conversions, so no bits are forced to 0. However, regardless of the conversion resolution, when writing to T

or TL at least 12 bits

must be sent following the Write TH or Write TL commands. The reason is that data written to TH and TL is not saved to EEPROM until the DS1626/DS1726 have received 12 bits, so if the operation is terminated before 12 bits have been received, the data will be lost. Any additional bits sent after the first twelve are ignored (e.g., if two 8-bit words are written).

Another DS1626/DS1726 thermostat feature is the temperature-high flag (THF) and temperature-low flag (TLF) in the configuration register. These bits provide a record of whether the temperature has been greater than or equal to T

or less than or equal to TL at any time since the DS1626/DS1726 were

powered up. If the temperature is greater than or equal to the TH register value, the THF bit in the configuration register will be set to 1. If the temperature is less than or equal to the TL register value, the TLF bit in the configuration register will be set to 1. Once THF and/or TLF has been set, it will remain set until the user overwrites it with a 0 or until the power is cycled.

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DS1626/DS1726

CPU BIT AND STAND-ALONE THERMOSTAT OPERATION

In stand-alone thermostat mode, DS1626/DS1726 thermostat functionality can be used without requiring a microcontroller to start/stop temperature conversions. The CPU bit in the configuration register determines if stand-alone mode is enabled.

When CPU = 1 stand-alone mode is disabled, and the only way to start/stop temperature conversions is by using a microcontroller to transmit Start Convert T and Stop Convert T commands, respectively.

Stand-alone mode is enabled when CPU = 0. In this mode, when RST = 0 the CLK/CNV pin operates as a control signal to start and stop temperature measurements. Driving CLK/CNV low initiates continuous temperature conversions that will continue until CLK/CNV is brought high again. If the CLK/CNV pin is driven low and then returned to a high state in less than 10ms, only one temperature conversion will be performed after which the DS1626/DS1726 will return to a low-power idle state (i.e., one-shot operation). Note that when stand-alone mode is enabled, the 1SHOT bit in the configuration register is ignored, and only the CLK/CNV signal determines whether continuous or one-shot conversions take place.

Since TH, TL, and the CPU bit are stored in EEPROM, the DS1626/DS1726 can be preprogrammed for stand-alone operation. If desired, the CLK/CNV and RST pin can be connected to GND so the DS1626/DS1726 will automatically begin taking temperature measurements at power-up

Normal bus communication with the DS1626/DS1726 can still take place in stand-alone mode when RST = 1. When communication is initiated, stand-alone conversions are automatically halted. If during the bus communication continuous temperature conversions are started using the Start Convert T command, they can only be stopped by issuing a Stop Convert T command.

Figure 5. THERMOSTAT OUTPUT OPERATION

COM

LOGIC 1

LOGIC 0

TEMP

HIGH

LOGIC 1

LOGIC 0

TEMP

LOW

LOGIC 1

LOGIC 0

TEMP

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DS1626/DS1726

CONFIGURATION REGISTER

The configuration register allows the user to customize the DS1626/DS1726 conversion and thermostat options. It also provides information to the user about conversion status, EEPROM activity, and thermostat activity. The configuration register is arranged as shown in Figure 6 and detailed descriptions of each bit are provided in Table 3. This register can be accessed using the Read Config and Write Config commands. Note that the R1, R0, CPU, and 1SHOT bits are stored in EEPROM and all other configuration register bits are SRAM.

Figure 6. CONFIGURATION REGISTER

MSb BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 LSb

DONE THF TLF NVB R1* R0* CPU* 1SHOT*

*NV (EEPROM)

Table 3. CONFIGURATION REGISTER BIT DESCRIPTIONS

BIT NAME

(USER ACCESS)

DONE

(Read Only)

THF

(Read/Write)

TLF

(Read/Write)

NVB

(Read Only)

R1*

(Read/Write)

R0*

(Read/Write)

CPU*

(Read/Write)

1SHOT*

(Read/Write)

*NV (EEPROM)

Power-up state = 1. DONE = 0. Temperature conversion is in progress. DONE = 1. Temperature conversion is complete. Power-up state = 0. THF = 1. The measured temperature has reached or exceeded the value stored in the T

power is cycled, or a Software POR command is issued. Power-up state = 0. TLF = 1. The measured temperature has equaled or dropped below the value stored in the T

power is cycled, or a Software POR command is issued. Power-up state = 0. NVB = 1. Write to an E NVB = 0. NV memory is not busy. Power-up state = last value written to this bit. Sets conversion resolution (see Table 4). Initial state from factory = 1. Power-up state = last value written to this bit. Sets conversion resolution (see Table 4). Initial state from factory = 1. Power-up state = last value written to this bit. CPU = 1. Stand-alone mode is disabled. CPU = 0. Stand-alone mode is enabled when RST = 0. See CPU BIT AND STAND- ALONE THERMOSTAT OPERATION section for more information. Initial state from factory = 0. Power-up state = last value written to this bit. 1SHOT = 1: One-Shot Mode. The Start Convert T command initiates a single temperature conversion and then the device goes into a low-power standby state. 1SHOT = 0: Continuous Conversion Mode. The Start Convert T command initiates continuous temperature conversions. Initial state from factory = 0.

FUNCTIONAL DESCRIPTION

memory cell is in progress.

9 of 12

DS1626/DS1726

Table 4. RESOLUTION CONFIGURATION

R1 R0

RESOLUTION

(BITS)

0 0 9 93.75 0 1 10 187.5 1 0 11 375 1 1 12 750

CONVERSION

TIME (MAX)

(ms)

3-WIRE SERIAL DATA BUS

The 3-wire bus consists of three signals: RST (active-low reset), CLK (clock), and DQ (data). 3-wire communication is controlled by the RST signal, which functions as “chip select” signal. All data is transferred LSb first over the 3-wire bus. All communication with the DS1626/DS1726 is initiated by driving RST high. Driving RST low terminates communications and causes DQ to go to a highimpedance state. Note that RST must be toggled low after every communication sequence to ensure that subsequent commands are recognized by the DS1626/DS1726.

When writing to the DS1626/DS1726, data must be valid during the rising edge of CLK. During read operations the DS1626/DS1726 output data on DQ on the falling edge of CLK and the data remains valid through the following rising edge, at which time the DQ pin becomes high impedance until the next falling edge.

To communicate with the DS1626/DS1726, the master must first drive RST high and then begin generating the CLK signal while transmitting the desired DS1626/DS1726 command byte. If the command is a Start Convert T, Stop Convert T, or Software POR command, the transaction is finished when the last bit of the command has been sent. Figure 7a illustrates a Start Convert T command sequence.

When writing to the DS1626/DS1726, the master must begin transmitting data during the clock cycle immediately following the command byte. The DS1626/DS1726 will save only the number of data bits needed for the specific transaction. For example, for the Write TH or Write TL commands, after twelve bits of data have been transmitted by the master, the DS1626/DS1726 will ignore any subsequent data transmitted before RST goes low. Thus, if data is being transmitted in byte-length segments, the DS1626/DS1726 will load the first twelve bits into the TH/TL register, and the next four bits will be ignored. On the other hand, it is necessary to transmit at least the required number of bits for the requested transaction (i.e., 12-bits to T

or 8-bits to the configuration register), because the

H/TL

DS1626/DS1726 will not save data until the expected number of bits have been received. Write TH and Write TL sequences are illustrated in Figure 7b and a Write Config sequence is shown in Figure 7c. Note that these figures assume byte-wide data transfers.

When reading data from the DS1626/DS1726, the DS1626/DS1726 will begin sending data during the clock cycle immediately following the command byte. After the last data byte has been sent, the DS1626/DS1726 will transmit a 0 during each subsequent clock until RST goes low. Figure 7d illustrates a Read Temperature sequence and a Read Config transaction is shown in Figure 7e. The sequence for reading the T

or TL registers is the same as the Read Temp transaction in Figure 7d except that the Read

TH or Read TL command is used.

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000

⋅⋅⋅

Figure 7. 3-WIRE COMMUNICATION

a) Start Temperature Conversion

b) Write to the TH/TL Registers

CLK

C1 C0

Write TH [01h] or TL [02h] Command

CLK

Start Convert T [51h] Command

0 0

DS1626/DS1726

1 0

D9 D10

TH or TL Data from Master

c) Write to the Configuration Register

CLK

Write Config [0Ch] Command

d) Read from the Temperature Register

CLK

Read Temperature [AAh] Command

e) Read from the Configuration Register

CLK

0 0

Configuration Reg. Data from Master

Temperature Data from DS1626/DS1726

0 1

8101 0

D5D6D

D11

000

Read Config [ACh] Command

11 of 12

Configuration Reg. Data from DS1626/DS1726

DS1626/DS1726

DS1626/DS1726 COMMAND SET

The DS1626/DS1726 command set is detailed below:

Start Convert T 51h 0101 0001

Initiates temperature conversions. If the DS1626/DS1726 are in one-shot mode (1SHOT = 1), only one conversion will be performed. If the devices are in continuous mode (1SHOT = 0), continuous conversions will be performed until a Stop Convert T command is issued.

Stop Convert T 22h 0010 0010

Stops temperature conversions when the devices are in continuous conversion mode (1SHOT = 0).

Read Temperature AAh 1010 1010

Reads the last converted temperature value from the temperature register.

Read TH A1h 1010 0001

Reads the 12-bit TH register.

Read TL A2h 1010 0010

Reads the 12-bit TL register.

Write TH* 01h 0000 0001

Writes the 12-bit TH register.

Write TL* 02h 0000 0010

Writes the 12-bit TL register.

Read Config ACh 1010 1100

Reads the 1-byte configuration register.

Write Config* 0Ch 0000 1100

Writes the 1-byte configuration register.

Software POR 54h 0101 0100

Initiates a software power-on reset (POR), which stops temperature conversions and resets all registers and logic to their power-up states. The software POR allows the user to simulate cycling the power without actually powering down the device.

*After issuing a write command, no further writes should be requested for at least 10ms due to the EEPROM write cycle time.

PACKAGE INFORMATION

For the latest package outline information, go to www.maxim-ic.com/packages.

PACKAGE TYPE PACKAGE CODE DOCUMENT NO.

8 μSOP

—

21-0036

12 of 12

Maxim/Dallas Semiconductor cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim/Dallas Semiconductor product. No circuit patent licenses are implied. Maxim/Dallas Semiconductor reserves the right to change the circuitry and specifications without notice at any time.

Maxim Integrated Products, 120 San Gabriel D rive, Sunnyvale, CA 94086 408-737-7600

The Maxim logo is a registered trademark of Maxim Integrated Products, Inc. The Dallas logo is a registered trademark of Dallas Semiconductor Corporation.

MAXIM DS1626, DS1726 Technical data

Specifications and Main Features

Frequently Asked Questions

User Manual