MAX6680MEE+T Maxim Integrated Products, MAX6680MEE+T Datasheet - Page 15

• Manufacturer Part Number: MAX6680MEE+T
• Description: IC TEMP SENSOR SMBUS 16-QSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX6680MEE+T

• Function: Thermometer, Thermostat
• Topology: ADC, Multiplexer, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: -55°C ~ 125°C, External Sensor
• Output Type: I²C™/SMBus™
• Output Alarm: Yes
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -55°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 16-QSOP
• Full Temp Accuracy: +/- 5 C, +/- 3 C
• Digital Output - Bus Interface: Serial (2-Wire)
• Digital Output - Number Of Bits: 10 bit + Sign
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 55 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

reside on the same bus without address conflicts
(Table 9).
The address pin states are checked at POR and RESET
only, and the address data stays latched to reduce qui-
escent supply current due to the bias current needed
for high-Z state detection. The MAX6680/MAX6681 also
respond to the SMBus Alert Response slave address
(see the Alert Response Address section).
The MAX6680/MAX6681 have a volatile memory. To
prevent unreliable power-supply conditions from cor-
rupting the data in memory and causing erratic behav-
ior, a POR voltage detector monitors V
memory if V
Characteristics). When power is first applied and V
rises above 2.0V (typ), the logic blocks begin operating,
although reads and writes at V
not recommended. A second V
UVLO comparator, prevents the ADC from converting
until there is sufficient headroom (V
• Interrupt latch is cleared.
• Address select pin is sampled.
• ADC begins autoconverting at a 1Hz rate (legacy
• Command register is set to 00h to facilitate quick
• T
• Hysteresis is set to 6°C.
• Transistor type is set to a substrate or common-col-
The MAX6680/MAX6681 are designed to provide ±1°C
accuracy for common microprocessors and discrete
transistors. To accommodate processes that differ sig-
nificantly in their ideality factor, the user can
increase/decrease the Remote Temperature Sensor
Data register with an offset by writing to the External
Offset High and Low Byte registers (11h and 12h,
respectively). The offset temperature data is represent-
ed as a 10 bits + sign with a 0.125LSB resolution.
resolution).
internal Receive Byte queries.
limits, respectively.
lector PNP.
HIGH
and T
CC
±1°C Fail-Safe Remote/Local Temperature
LOW
falls below 1.91V (typ, see Electrical
______________________________________________________________________________________
registers are set to max and min
Temperature Offset
CC
CC
levels below 3.0V are
comparator, the ADC
CC
Power-Up Defaults
POR and UVLO
CC
= 2.8V typ).
and clears the
Sensors with SMBus Interface
CC
Table 8. Conversion-Rate Control Byte
Note: If extended resolution is selected using bit 4 of the
Configuration register, the extended conversion is limited to a
maximum of 4Hz.
Table 9. POR Slave Address Decoding
(ADD0 and ADD1)
TRANSISTOR COUNT: 17,150
PROCESS: BiCMOS
HIGH-Z
HIGH-Z
HIGH-Z
ADD0
GND
GND
GND
V
V
V
CC
CC
CC
DATA
00h
01h
02h
03h
04h
05h
06h
07h
HIGH-Z
HIGH-Z
HIGH-Z
ADD1
GND
GND
GND
V
V
V
CC
CC
CC
Chip Information
CONVERSION RATE (Hz)
0.0625
0.125
0.25
0.5
1
2
4
8
ADDRESS
0011 000
0011 001
0011 010
0101 001
0101 010
0101 011
1001 100
1001 101
1001 110
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