MAX6621_09 Datasheet, PDF (1/18 Pages) Maxim Integrated Products – PECI-to-I2C Translator

19-0729; Rev 2; 12/09
PECI-to-I²C Translator
General Description
The MAX6621 PECI-to-I²C translator provides an effi-
cient, low-cost solution for PECI-to-SMBus^TM/I²C proto-
col conversion. The PECI-compliant host reads
temperature data directly from up to four PECI-enabled
CPUs. Interrupts are generated when the measured
temperature exceeds the high-temperature limit and
causes ALERT to assert. The RESET input allows the
host to reset the I²C bus in the event of a communica-
tion error.
The I²C interface provides an independent serial com-
munication channel to communicate synchronously with
peripheral devices in a multiple master or multiple slave
system. This interface allows a maximum serial-data
rate of 400kbps.
The MAX6621 is designed to operate from a +3.0V to
+3.6V supply voltage and ambient temperature range
of -20°C to +120°C.
Servers
Workstations
Desktop Computers
Applications
SMBus is a trademark of Intel Corp.
μMAX is a registered trademark of Maxim Integrated Products, Inc.
Features
♦ 400kbps I²C-Compatible, 2-Wire Serial Interface
♦ +3V to +3.6V Supply Voltage
♦ PECI-Compliant Port
♦ PECI-to-I²C Translation
♦ ALERT Output
♦ RESET Input (May Be Disabled as a Factory
Option)
♦ Programmable Temperature Offsets
♦ -20°C to +120°C Operating Temperature Range
♦ V_REF Input Refers Logic Levels to the PECI
Supply Voltage
♦ Automatic I²C Bus Lockup Timeout Reset
♦ Lead-Free, 10-Pin µMAX^® Package
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX6621AUB+
-20°C to +120°C
10 μMAX
MAX6621AUB+T -20°C to +120°C
10 μMAX
T = Tape and reel.
+Denotes a lead(Pb)-free/RoHS-compliant package.
Pin Configuration appears at end of data sheet.
Typical Application Circuit
SDA
I²C ^SCL
MASTER
+3.3V
V_TT
V_CC
SDA
V_REF
SCL _MAX6621 PECI
RESET
ALERT
AD0
GND
V_CPU
CPU
INTERNAL
TEMP
SENSOR
________________________________________________________________ Maxim Integrated Products 1
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.