5.5 AC Electrical Characteristics

The following specifications apply for VDD = 3.0 VDC to 3.6 VDC, and all analog source impedance RS = 50Ω unless

otherwise specified in the conditions. Boldface limits apply for TA = TMIN to TMAX; all other limits TA= +25°C.

Symbol

Parameter

Conditions

Typical

(1)

Limits

(2)

Units

(Limit)

TACHOMETER ACCURACY

Fan Control Accuracy

±10

% (max)

Fan Full-Scale Count

65535

(max)

Fan Counter Clock Frequency

90

kHz

Fan Count Update Frequency

1.0

Hz

FAN PWM OUTPUT

Frequency Accuracy

±10

% (max)

(1)

“Typicals” are at TA = 25°C and represent most likely parametric norm. They are to be used as general reference values not for critical

design calculations.

(2)

Limits are guaranteed to TI's AOQL (Average Outgoing Quality Level).

5.6 Digital Electrical Characteristics

Symbol

Parameter

Conditions

Typical

(1)

Limits

(2)

Units

(Limit)

VIH

Logical High Input Voltage

2.1

V (min)

VIL

Logical Low Input Voltage

0.8

V (max)

IIH

Logical High Input Current

VIN = VDD

0.005

+10

µA (max)

IIL

Logical Low Input Current

VIN = GND

−0.005

−10

µA (max)

CIN

Digital Input Capacitance

20

pF

(1)

“Typicals” are at TA = 25°C and represent most likely parametric norm. They are to be used as general reference values not for critical

design calculations.

(2)

Limits are guaranteed to TI's AOQL (Average Outgoing Quality Level).

5.7 SMBus Logical Electrical Characteristics

The following specifications apply for VDD = 3.0 VDC to 3.6 VDC, and all analog source impedance RS = 50 Ω unless

otherwise specified in the conditions. Boldface limits apply for TA = TMIN to TMAX; all other limits TA = +25°C.

Symbol

Parameter

Conditions

Typical

(1)

Limits

(2)

Units

(Limit)

SMBDAT OPEN-DRAIN OUTPUT

VOL

Logic Low Level Output Voltage

IOL = 4 mA

0.4

V (max)

IOH

High Level Output Current

VOUT = VDD

0.03

10

µA (max)

SMBDAT, SMBCLK INPUTS

VIH

Logical High Input Voltage

2.1

V (min)

VIL

Logical Low Input Voltage

0.8

V (max)

VHYST

Logic Input Hysteresis Voltage

400

mV

(1)

“Typicals” are at TA = 25°C and represent most likely parametric norm. They are to be used as general reference values not for critical

design calculations.

(2)

Limits are guaranteed to TI's AOQL (Average Outgoing Quality Level).

www.ti.com

LM64

SNAS207B – MAY 2004 – REVISED JANUARY 2024

Copyright © 2024 Texas Instruments Incorporated

Submit Document Feedback

7

Product Folder Links: LM64