Datasheet

LM96163
2
3
4
5
6
7
8
9
VDD
D+
D-
PWM
SMBDAT
TACH
ALERT
GND
1
10
TCRIT
SMBCLK
LM96163
SNAS433D –JUNE 2008–REVISED MAY 2013 www.ti.com
Connection Diagrams
Figure 1. 10-Pin SON (TopView)
See DSC0010A Package
Pin Descriptions
Pin Name Input/Output Function and Connection
Open-Drain Digital Output. Connect to system shutdown. Pin activates when
Open-Drain
1 TCRIT temperature conversion value exceeds programmed limit. Several power-on-default
Digital Output
limit values are available.
Connect to a low-noise +3.3 ± 0.3 V
DC
power supply, and bypass to GND with a 0.1 µF
2 V
DD
Power Supply Input ceramic capacitor in parallel with a 100 pF ceramic capacitor. A bulk capacitance of
10 µF needs to be in the vicinity of the LM96163's V
DD
pin.
Connect to the anode (positive side) of the remote diode. A 100pF capacitor can be
3 D+ Analog Input
connected between pins 3 and 4.
Connect to the cathode (negative side) of the remote diode. A 100pF capacitor can be
4 D− Analog Input
connected between pins 3 and 4.
Open-Drain Open-Drain Digital Output. Connect to fan drive circuitry. The power-on default for this
5 PWM
Digital Output pin is low (pin 4 pulled to ground).
6 GND Ground This is the analog and digital ground return.
Open-Drain This pin is an open-drain ALERT output.
7 ALERT
Digital Output
Tachometer input for measuring fan speed. Note the TACH input is disabled upon
8 TACH Digital Input power-up and needs to be enabled for use by setting TCHEN bit 2 of Configuration
Register 03h.
Digital Input/
9 SMBDAT Open-Drain Digital This is the bidirectional SMBus data line.
Output
10 SMBCLK Digital Input Digital Input. This is the SMBus clock input.
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