emc2104 Standard Microsystems Corp., emc2104 Datasheet - Page 15

• Manufacturer Part Number: emc2104
• Description: Emc2104 Dual Rpm-based Pwm Fan Controller With Hardware Thermal Shutdown
• Manufacturer: Standard Microsystems Corp.

Dual RPM-Based PWM Fan Controller with Hardware Thermal Shutdown
Datasheet
SMSC EMC2104
VDD = 3V to 3.6V, VDD_5V = 4.5V to 5.5V, T
Supply Current from
VDD_5V
Temperature
Accuracy
Temperature
Resolution
Diode decoupling
capacitor
Resistance Error
Corrected
Temperature
Accuracy
Temperature
Resolution
Total Unadjusted
Error
Reference Voltage
Reference Accuracy
PWM Resolution
PWM Duty Cycle
Tachometer Range
Tachometer Setting
Accuracy
CHARACTERISTIC
Input High Voltage
Input Low Voltage
SYMBOL
R
C
Δ
Δ
Δ
DUTY
TACH
PWM
I
V
SERIES
FILTER
TUE
T
DD_5
V
V
TACH
TACH
V
REF
DIE
REF
IH
IL
Table 3.2 Electrical Specifications (continued)
MIN
480
2.0
External Temperature Monitors
0
Internal Temperature Monitor
RPM Based Fan Controller
A
Voltage Measurement
= -40°C to 85°C, all Typical values at T
DATASHEET
PWM Fan Driver
Digital I/O pins
±0.25
0.125
0.125
2200
TYP
±0.5
±2.5
100
800
256
±1
±1
1
noted.
15
16000
MAX
2700
100
100
0.8
±1
±2
±2
±2
±5
1
Steps
UNIT
RPM
Ohm
mV
uA
pF
°C
°C
°C
°C
°C
%
%
%
%
%
V
V
Fan Driver enabled, No load
current
60°C < T
30°C < T
0°C < T
0°C < T
Connected across external
diode, CPU, GPU, or AMD diode
Sum of series resistance in both
DP and DN lines
Measured at 3/4 full scale
External oscillator 32.768kHz
Internal Oscillator
40°C < T
A
= 27°C unless otherwise
DIODE
DIE
CONDITIONS
DIODE
DIE
DIE
Revision 1.74 (05-08-08)
< 115°C
< 85°C
< 100°C
< 125°C,
< 110°C