LM64EVAL National Semiconductor, LM64EVAL Datasheet - Page 2

• Manufacturer Part Number: LM64EVAL
• Description: BOARD EVALUATION LM64
• Manufacturer: National Semiconductor

Specifications of LM64EVAL

• Sensor Type: Temperature, Fan Controller
• Sensing Range: 0°C ~ 85°C
• Interface: SMBus (2-Wire/I²C)
• Sensitivity: ±1°C
• Voltage - Supply: 3 V ~ 3.6 V
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: LM64
• Lead Free Status / RoHS Status: Not applicable / Not applicable

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Pin
Pin Descriptions
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1
2
3
4
5
6
7
8
9
SMBDAT
SMBCLK
ALERT
GPIO1
GPIO2
GPIO3
GPIO5
GPIO4
Name
GPD1
GPD2
GPD3
GPD4
GPD5
T_Crit
TACH
PWM
GND
V
N/C
N/C
N/C
D+
A0
D-
DD
Power Supply Input
Open-Drain Output
Open-Drain Output
Open-Drain Output
Open-Drain Output
Open-Drain Output
Open-Drain Output
Digital Output
Digital Output
Digital Output
Input/Output
Analog Input
Analog Input
Digital Input/
Digital Input/
Digital Input/
Digital Input/
Digital Input/
Digital Input/
Digital Input
Digital Input
Digital Input
Digital Input
Digital Input
Digital Input
Digital Input
Digital Input
Open-Drain
Open-Drain
Open-Drain
Ground
N/A
N/A
N/A
General Purpose Open-Drain Digital Output or Digital Input. Typical pull-up
resistor is 10 kΩ to V
General Purpose Open-Drain Digital Output or Digital Input. Typical pull-up
resistor is 10 kΩ to V
General Purpose Open-Drain Digital Output or Digital Input. Typical pull-up
resistor is 10 kΩ to V
Open-Drain Digital Output. Connect to fan drive circuitry. The power-on
default for this pin is low (pin 4 pulled to ground).
Connect to a low-noise +3.3
with a 0.1 µF ceramic capacitor in parallel with a 100 pF ceramic capacitor.
A bulk capacitance of 10 µF needs to be in the vicinity of the LM64’s V
pin.
Connect to the anode (positive side) of the remote diode. A 2.2 nF ceramic
capacitor must be connected between pins 6 and 7.
Connect to the cathode (negative side) of the remote diode. A 2.2 nF
ceramic capacitor must be connected between pins 6 and 7.
Open-Drain Digital Output. Typical pull-up resistor is 3 kΩ to V
No Connection.
No Connection.
No Connection.
SMBus Address Select pin. If High, the SMBus address is 0x4E or, if Low,
the SMBus address is 0x18. Typical pull-up resistor is 10 kΩ to V
This is the analog and digital ground return.
This pin is an open-drain ALERT Output. Typical pull-up resistor is 3 kΩ to
V
This pin is a digital tachometer input. Typical pull-up resistor is 3 kΩ to
V
This is the bi-directional SMBus data line. Typical pull-up resistor is 1.5 kΩ
to V
This is the SMBus clock input. Typical pull-up resistor is 1.5 kΩ to V
General Purpose Open-Drain Digital Output or Digital Input. Typical pull-up
resistor is 10 kΩ to V
General Purpose Open-Drain Digital Output or Digital Input. Typical pull-up
resistor is 10 kΩ to V
General Purpose Default Input Pin. Typical pull-up resistor is 10 kΩ to V
Always connect to a logical High or Low level.
General Purpose Default Input Pin. Typical pull-up resistor is 10 kΩ to V
Always connect to a logical High or Low level.
General Purpose Default Input Pin. Typical pull-up resistor is 10 kΩ to V
Always connect to a logical High or Low level.
General Purpose Default Input Pin. Typical pull-up resistor is 10 kΩ to V
Always connect to a logical High or Low level.
General Purpose Default Input Pin. Typical pull-up resistor is 10 kΩ to V
Always connect to a logical High or Low level.
DD
DD
.
.
DD
.
2
DD
DD
DD
DD
DD
.
.
.
.
.
Function and Connection
±
0.3 VDC power supply, and bypass to GND
DD
.
DD
.
DD
.
DD
DD
DD
DD
DD
DD
.
.
.
.
.