LM40CIMT/NOPB National Semiconductor, LM40CIMT/NOPB Datasheet - Page 2

• Manufacturer Part Number: LM40CIMT/NOPB
• Description: IC HARDWARE MONITOR 14-TSSOP
• Manufacturer: National Semiconductor

Specifications of LM40CIMT/NOPB

• Applications: Monitors
• Interface: 1-Wire
• Voltage - Supply: 3 V ~ 3.6 V
• Package / Case: 14-TSSOP
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LM40CIMT; *LM40CIMT/NOPB; LM40CIMT

www.national.com
Connection Diagram
Pin Description
Pin Number
1, 14
8, 10
9, 11
12
13
2
3
4
5
6
7
National Package Number MTC14C
V+/+3.3V_SBY
TSSOP-14
Pin Name
Top View
D1+, D2+
D1-, D2-
+1.2V
+2.5V
SWD
+12V
GND
ADD
+5V
NC
Description
No Connect
Ground
Positive power supply pin as well
as a +3.3V voltage monitor
SensorPath Bus line; Open-drain
output
Digital input - device number select
input for the serial bus device
number
+1.2V voltage monitoring input with
scaling resistors
+2.5V voltage monitoring input with
scaling resistors
Thermal diode analog voltage
output and negative monitoring
input
Thermal diode analog current
output and positive monitoring input
+5V voltage monitoring input with
scaling resistors
+12V voltage monitoring input with
scaling resistors
20068402
2
Order
Number
LM40CIMT
LM40CIMTX
Typical Connection
May be tied to V+, GND or left floating
System ground
Connected system 3.3 V standby power and
to a 0.1 µF bypass capacitor in parallel with
100 pF. A bulk capacitance of approximately
10 µF needs to be in the near vicinity of the
LM40.
Super I/O, Pull-up resistor, 1.6k
Pull-up to 3.3 V or pull-down to GND resistor,
10k; must never be left floating
Processor core voltage to be monitored
Power supply voltage to be monitored
Remote Thermal Diode cathode
(THERM_DC) - Diode 1 should always be
connected to the processor thermal diode.
Diode 2 may be connected to an MMBT3904
or GPU thermal diode. A 100 pF capacitor
should be connected between respective D-
and D+ for noise filtering.
Remote Thermal Diode anode (THERM_DA) -
Diode 1 should always be connected to the
processor thermal diode. Diode 2 may be
connected to an MMBT3904 or GPU thermal
diode. A 100 pF capacitor should be
connected between respective D- and D+ for
noise filtering.
Power supply voltage to be monitored
Power supply voltage to be monitored
Package
Marking
LM40
LM40
CIMT
CIMT
Package
MTC14C
MTC14C
Number
NS
Transport
Media
94 units per
rail
2500 units in
tape and reel