MAX6633, MAX6634, MAX6635 12-Bit Plus Sign Temperature Sensors with SMBus/I²C-Compatible Serial Interface

Description

The MAX6633/MAX6634/MAX6635 combine a temperature sensor, a programmable overtemperature alarm, and an SMBus™/I²C-compatible serial interface into a single package. They convert their die temperatures into digital values using internal analog-to-digital converters (ADCs). The result of the conversion is then held in a temperature register as a 12-bit + sign value, allowing 0.0625°C resolution, readable at any time through the serial interface. The devices are capable of reading temperatures up to +150°C.

The MAX6633/MAX6634/MAX6635 feature a shutdown mode that saves power by turning off everything except the power-on reset (POR) and the serial interface. The devices can be configured to separate addresses, allowing multiple devices to be used on the same bus.

The MAX6633 has four address pins, allowing up to 16 devices to be connected to a single bus. The MAX6634 has three address pins, allowing up to eight devices to be connected to a single bus. The MAX6635 has two address pins, allowing up to four devices to be connected to a single bus.

The MAX6633/MAX6634/MAX6635 make temperature data available for transfer over the serial interface. The MAX6634 incorporates a dual-mode active-low ALERT output (open drain) and can serve as an upgraded alternative to the LM75. The MAX6635 includes an active-low ALERT output and an active-low OVERT output (both open drain) and can function as an upgraded replacement for the LM76 in most applications. The MAX6634/MAX6635 feature user-programmable temperature thresholds. All three devices come in an 8-pin SO package.

Key Features

Applications/Uses

+3V to +5.5V Supply Range
Accuracy
- ±1°C max (0°C to +50°C)
- ±1.5°C max (-20°C to +85°C)
- ±2.5°C max (-40°C to +125°C)
- ±2.5°C typ (+150°C)
User-Programmable Temperature Thresholds (MAX6634/MAX6635)
User-Configurable Alarm Output(s) (MAX6634/MAX6635)
Ability to Respond to SMBus/I²C-Compatible Alert Response Address (MAX6634/MAX6635)
Active-low OVERT Output for System Shutdown (MAX6635)
Multiple Devices per Bus
- 16 devices (MAX6633)
- 8 devices (MAX6634)
- 4 devices (MAX6635)

	Automotive Electronics
	Battery-Temperature Alarms
	PC Temperature Control

Key Specifications: Temperature Sensors

Part Number

Sensor Type

Alarm Output

Interface

Accuracy (±°C)

Parasite Power

Temperature Threshold

Temperature Resolution (Bits)

Multi-Droppable

Features

RoHS Available

Package

Price^**

MAX6633

Local

2-Wire/SMBus

Yes

SOIC/8

$1.28 @ 1k

MAX6634

Alert

Programmable

$1.33 @ 1k

MAX6635

Alert
Overt

Programmable

•	Multiple Temperature Thresholds

•	Second Threshold (Warning)

•	Two Alarm Outputs

$1.37 @ 1k

See All Temperature Sensors (97)

Notes:
^**This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Reliability Reports


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		Reliability Report: MAX6633MSA.pdf MAX6635MSA.pdf

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Ordering Information

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
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Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-12 of 12

MAX6633

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX6633MSA

SOIC;8 pin;
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-2*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX6633MSA-T

SOIC;8 pin;
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-2*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX6633MSA+T

SOIC;8 pin;
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8+2*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX6633MSA+

SOIC;8 pin;
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8+2*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX6634

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX6634MSA+

SOIC;8 pin;
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8+2*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX6634MSA+T

SOIC;8 pin;
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8+2*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX6634MSA-T

SOIC;8 pin;
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-2*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX6634MSA

SOIC;8 pin;
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-2*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX6635

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX6635MSA-T

SOIC;8 pin;
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-2*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX6635MSA+T

SOIC;8 pin;
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8+2*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX6635MSA

SOIC;8 pin;
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8-2*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX6635MSA+

SOIC;8 pin;
Dwg: 21-0041B (PDF)
Use pkgcode/variation: S8+2*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis