TC655 Microchip Technology Inc., TC655 Datasheet - Page 3

• Manufacturer Part Number: TC655
• Description: Dual Smbus Pwm Fan Speed Controllers With Fan Fault Detection
• Manufacturer: Microchip Technology Inc.

1.0
Absolute Maximum Ratings *
V
Input Voltages .................................... -0.3 V to (V
Output Voltages ................................. -0.3 V to (V
Storage temperature .....................................-65°C to +150°C
Ambient temp. with power applied ................-40°C to +125°C
Maximum Junction Temperature, T
ESD protection on all pins
*Notice: Stresses above those listed under “Maximum rat-
ings” may cause permanent damage to the device. This is a
stress rating only and functional operation of the device at
those or any other conditions above those indicated in the
operational listings of this specification is not implied. Expo-
sure to maximum rating conditions for extended periods may
affect device reliability.
ELECTRICAL SPECIFICATIONS
Electrical Characteristics: Unless otherwise noted, all limits are specified for V
Supply Voltage
Operating Supply Current
Shutdown Mode Supply Current
V
V
V
Sink Current at V
Source Current at V
PWM Frequency
V
V
duty-cycle
V
V
V
SENSE Input
SENSE Input Threshold Voltage with
Respect to GND
FAULT Output
FAULT Output LOW Voltage
FAULT Output Response Time
Fan RPM-to-Digital Output
Fan RPM ERROR
Note 1: Not production tested, ensured by design, tested during characterization.
DD
-40°C <T
2002 Microchip Technology Inc.
OUT
OUT
OUT
IN
IN
C(MAX)
IN
IN
..................................................................................6.5 V
Input
Input Voltage for 100% PWM
Input Resistance
Input Leakage Current
2: For 5.0 V > V
PWM Output
Rise Time
Fall Time
ELECTRICAL
CHARACTERISTICS
- V
A
< +85°C.
C(MIN)
Parameters
OUT
OUT
Output
DD
Output
5.5 V, the limit for V
J
............................. 150°C
V
V
I
V
DDSHDN
THSENSE
CRANGE
t
DD
DD
Sym
C(MAX)
FAULT
V
V
I
I
I
I
DD
t
OH
t
OL
F
DD
IN
R
OL
F
+ 0.3 V)
+ 0.3 V)
IH
= 2.2 V.
4 kV
2.45
1.25
Min
-1.0
3.0
1.0
5.0
-15
26
80
—
—
—
—
—
—
—
PIN FUNCTION TABLE
V
C
SCLK
SDA
GND
FAULT
SENSE2
SENSE1
V
V
10M
IN
OUT
DD
Typ
150
100
F
2.6
1.4
2.4
30
—
—
—
—
—
—
—
—
Name
5
Max
2.75
1.55
+1.0
300
120
+15
Analog Input
Analog Output
Serial Clock Input
Serial Data In/Out (Open Drain)
Ground
Digital (Open Drain) Output
Analog Input
Analog Input
Digital Output
Power Supply Input
5.5
0.3
10
50
50
34
—
—
—
—
DD
TC654/TC655
= 3.0 V to 5.5 V,
Units
µsec I
µsec I
sec
mA
mA
mV
Hz
µA
µA
µA
%
V
V
V
V
Function
Pins 7, 8, 9 Open
Pins 7, 8, 9 Open
V
V
C
V
I
RPM > 1600
OH
OL
OL
OL
OH
DD
F
= 1 µF
= 1 mA, Note 1
= 2.5 mA
= 5 mA, Note 1
= 10% of V
= 5.0 V
= 80% of V
Conditions
DS21734A-page 3
DD
DD