±1°C, SMBus-Compatible Remote/Local Temperature
Sensors with Overtemperature Alarms
Pin Description
PIN
MAX6657
MAX6658
1
MAX6659
NAME
FUNCTION
MAX6657/MAX6658/MAX6659
1
V
CC
Supply Voltage Input, +3V to +5.5V. Bypass to GND with a 0.1µF capacitor. A 200Ω
series resistor is recommended but not required for additional noise filtering. See
Typical Operating Circuit.
Combined Remote-Diode Current Source and A/D Positive Input for Remote-Diode
Channel.
DO NOT LEAVE DXP FLOATING;
connect DXP to DXN if no remote diode
is used. Place a 2200pF capacitor between DXP and DXN for noise filtering.
Combined Remote-Diode Current Sink and A/D Negative Input. DXN is internally
biased to one diode drop above ground.
Overtemperature Active-Low Output, Open-Drain. Output is logic low only when
temperature is above the software programmed threshold.
Ground
SMBus Alert (Interrupt) Active-Low Output, Open-Drain. Asserts when temperature
exceeds user-set limits (high or low temperature). Stays asserted until acknowledged
by either reading the Status register or by successfully responding to an Alert
Response address. See
ALERT
Interrupts.
SMBus Serial-Data Input/Output, Open-Drain
SMBus Serial-Clock Input
SMBus Address-Select Pin. The MAX6659 is set to one of three available addresses
(connect to V
CC
, GND, or leave open). See
Slave Addresses
section.
Overtemperature Active-Low Output, Open-Drain. Output is logic low only when
temperature is above the software programmed threshold.
Hardware Standby Input. Temperature and comparison threshold data are retained in
standby mode. If
STBY
is low, the IC is put into standby mode.
Not internally connected. Do not make connections to these pins.
2
3
DXP
3
4
5
4
6
7, 8
DXN
OVERT1
GND
6
9
ALERT
7
8
—
—
—
—
12
14
5
10
15
2, 11, 13, 16
SMBDATA
SMBCLK
ADD
OVERT2
STBY
N.C.
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5
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
