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MAX6604AAHA+

P1-P3P4-P6P7-P9P10-P12P13-P15
General Description
The MAX6604 high-precision temperature sensor is
designed for thermal monitoring functions in DDR memo-
ry modules. The device is readable and programmable
through the 2-wire SMBus/I
2
C-compatible interface.
Three address inputs set the bus address for the temper-
ature sensor to provide up to eight devices on one bus.
The internal thermal sensor continuously monitors the
temperature and updates the temperature data eight
times per second. The master can read the tempera-
ture data at any time. Since the thermal sensor is locat-
ed on the memory module, temperature data recorded
accurately represents the temperature of the compo-
nents on the module. Consequently, the MAX6604 pro-
vides a much more accurate measurement of module
temperature than techniques involving temperature
sensors on the motherboard. In addition, the device
responds more quickly to temperature changes on the
module than a motherboard sensor.
The MAX6604 also features an interrupt-output indica-
tor for temperature-threshold monitoring. The threshold
levels are programmable through the digital interface.
The MAX6604 operates from -20°C to +125°C, and is
available in JEDEC-standard 8-pin TSSOP and 8-pin
TDFN (2mm x 3mm) packages.
Applications
Memory Modules
Desktop Computers
Notebook Computers
Workstations
Networking Equipment
Features
♦ JEDEC Compliant
♦ ±1°C Temperature-Monitoring Accuracy
♦ Overtemperature Interrupt with Programmable
Threshold
♦ +2.7V to +3.6V Operating Voltage Range
♦ SMBus/I
2
C-Compatible Interface
♦ 300µA Typical Operating Current
♦ 3µA Typical Shutdown Current
♦ -20°C to +125°C Operating Temperature Range
♦ 8-Pin TSSOP and 8-Pin TDFN (2mm x 3mm)
Packages
MAX6604
Precision Temperature Monitor for
DDR Memory Modules
________________________________________________________________
Maxim Integrated Products
1
Ordering Information
19-3837; Rev 3; 10/11
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
PART
SERIAL-
CLOCK
FREQUENCY
(kHz)
PIN-PACKAGE
SPECIAL
TOP
MARK
MAX6604AATA+ 400
8 TDFN-EP*
(MO229-WCED-2)
AAR
MAX6604AAHA+ 400 8 TSSOP —
EVALUATION KIT
AVAILABLE
Typical Application Circuit appears at end of data sheet.
1
+
+
34
865
V
CC
SCL SDA
MAX6604
MAX6604
2
7
EVENT
A0 A2 GND
EP
A1
TDFN
TSSOP
TOP VIEW
SCL
SDA
GND
1
2
8
7
V
CC
EVENT
A1
A2
A0
3
4
6
5
Pin Configurations
+
Denotes a lead(Pb)-free/RoHS-compliant package.
*
EP = Exposed pad.
Note: These devices operate over the -20°C to +125°C operat-
ing temperature range.
MAX6604
Precision Temperature Monitor for
DDR Memory Modules
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= +2.7V to +3.6V, T
A
= -20°C to +125°C, unless otherwise noted. Typical values are at V
CC
= +3.3V, T
A
= +25°C.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
All Input and Output Voltages ..................................-0.3V to +6V
Continuous Power Dissipation (T
A
= +70°C)
8-Pin TDFN (derate 16.7mW/°C above +70°C) ......1333.3mW
8-Pin TSSOP (derate 8.1mW/°C above +70°C) ........646.7mW
ESD Protection (all pins, Human Body Model) ....................±2kV
Junction Temperature......................................................+150°C
Operating Temperature Range .........................-20°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Operating Supply Voltage Range V
CC
+2.7 +3.6 V
0.125 °C
Temperature Resolution
11 bits
+3V ≤ V
CC
≤ +3.6V, +75°C ≤ T
A
≤ +95°C -1 +1
+3V ≤ V
CC
≤ +3.6V, +40°C ≤ T
A
≤ +125°C -2 +2
Temperature Accuracy
+3V ≤ V
CC
≤ +3.6V, -20°C ≤ T
A
≤ +125°C -3 +3
°C
Power-On Reset (POR) Threshold V
CC
falling edge 2.0 V
POR Threshold Hysteresis 90 mV
Undervoltage-Lockout Threshold 2.4 V
Operating Current During conversion 0.3 0.5 mA
Standby Current 36µA
Conversion Time t
CONV
125 ms
Conversion Rate f
CONV
8Hz
DIGITAL INTERFACE (Note 2)
Log i c- Inp ut H i g h V ol tag e ( S C L, S D A) V
IH
2.1 V
Logic-Input Low Voltage (SCL, SDA) V
IL
0.8 V
Logic-Input Hysteresis (SCL, SDA) 500 mV
Leakag e C ur r ent ( E V E N T, S C L, S D A,
A2, A1, A0)
I
LEAK
V
IN
= V
GND
or V
CC
-1 +1 µA
Logic-Output Low Voltage
(SDA, EVENT)
V
OL
I
PULL_UP
= 350µA 50 mV
Logic-Output Low Sink Current
(SDA, EVENT)
I
OL
V
OL
= 0.6V 6 mA
Input Capacitance (SCL, SDA) C
IN
5pF
MAX6604
Precision Temperature Monitor for
DDR Memory Modules
_______________________________________________________________________________________ 3
TIMING CHARACTERISTICS—MAX6604AATA+, MAX6604AAHA+
(V
CC
= +2.7V to +3.6V, T
A
= -20°C to +125°C, unless otherwise noted. Typical values are at V
CC
= +3.3V, T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
TIMING CHARACTERISTICS FOR FAST MODE
Serial-Clock Frequency f
SCL
400 kHz
Bus Free Time Between a STOP
and a START Condition
t
BUF
1.3 µs
Hold Time for START Condition t
HD:STA
0.6 µs
Low Period of the SCL Clock t
LOW
1.3 µs
High Period of the SCL Clock t
HIGH
0.6 µs
Setup Time for a Repeated START
Condition
t
SU:STA
0.6 µs
Data Hold Time t
HD:DAT
0 900 ns
Data Setup Time t
SU:DAT
100 ns
Rise Time of Both SDA and SCL
Signals, Receiving
t
R
Measured from 0.3V
DD
- 0.7V
DD
20 + 0.1C
B
300 ns
Fall Time of SDA Transmitting t
F
Measured from 0.3V
DD
- 0.7V
DD
20 + 0.1C
B
300 ns
Setup Time for STOP Condition t
SU:STO
0.6 µs
Capacitive Load for Each Bus Line C
B
400 pF
Pulse Width of Spike Suppressed t
SP
50 ns
Note 1: All parameters are tested at T
A
= +25°C. Specifications over temperature are guaranteed by design.
Note 2: Guaranteed by design.
P1-P3P4-P6P7-P9P10-P12P13-P15

MAX6604AAHA+

Mfr. #:
Buy MAX6604AAHA+
Manufacturer:
Maxim Integrated
Description:
Board Mount Temperature Sensors Precision Temperature Monitor for DDR Memory Modules
Lifecycle:
New from this manufacturer.
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