STC3485E Datasheet Rev.0.1, Dec.2005
Page of 11
2
STC International Limited http://www.mcu-memory.com
Selector Guide
Absolute Maximum Ratings
Stresses beyond those listed under “Absolute Maximum Ratings”may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not
implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
DC Electrical Characteristics
(VCC = 3.3V ±0.3V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX UNITS
RL = 54O ?
(RS-485), Figure 2
1.2
Differential Driver Output
VOD
RL = 60O ?
(RS-485), VCC = 3.3V, Figure3
1.2
V
Change in Magnitude of Driver Differential
Output Voltage for Complementary Output
States (Note 1)
?VOD
RL = 54O?
or 100O, Figure 2
0.2
V
Driver Common-Mode Output Voltage
VOC
RL = 54O?
or 100O, Figure 2
2
V
Change in Magnitude of
Common-Mode Output Voltage
(Note 1)
?VOC
RL = 54Oor 100O, Figure 2
0.2
V
Input High Voltage
VIH
DE, DI, /RE
2.0
V
Input Low Voltage
VIL
DE, DI, /RE
0.8
V
Logic Input Current
IIN1
DE, DI, /RE
±2
µA
VIN = 12V
1.0
Input Current (A, B)
IIN2
DE = 0V,
VCC = 0V or 3.6V
VIN = -7V
-0.8
mA
Receiver Differential
Threshold Voltage
VTH
-7V≤VCM≤12V
-0.2
-0.05
V
Receiver Input Hysteresis
?VTH
VCM = 0V
20
mV
Receiver Output High Voltage
VOH
IOUT = -1.5mA, VID = 200mV, Figure 4
VCC - 0.4
V
Receiver Output Low Voltage
VOL
IOUT = 2.5mA, VID = 200mV, Figure 4
0.4
V
Three-State (High Impedance)
Output Current at Receiver
IOZR
VCC = 3.6V, 0V≤VOUT≤VCC
±1
µA
Receiver Input Resistance
RIN
-7V≤VCM≤12V
96
kO
Supply Voltage Range
VCC
3.0
3.6
V
DE = VCC, /RE = 0V or VCC
0.6
1.2
Supply Current
ICC
No load,
DI = 0V or VCC
DE = 0V, /RE = 0V
0.5
1.0
mA
Supply Current in Shutdown Mode
ISHDN
DE = 0V, /RE = VCC, DI = VCC or 0V
1.0
µA
VOUT = -7V
-250
Driver Short-Circuit Output Current
IOSD
VOUT = 12V
250
mA
Receiver Short-Circuit Output Current
IOSR
0V≤VRO≤VCC
±8
±60
mA
Human Body Model
±15
ESD Protection for A, B
IEC 1000-4-2 Air Discharge
±15
kV
PART
NUMBER
GUARANTEED
DATA RATE
(Mbps)
SUPPLY
VOLTAGE
(V)
SLEW-RATE
LIMITED
DRIVER/
RECEIVER
ENABLE
SHUTDOWN
CURRENT
(µA)
±15kV
ESD
PROTECTION
PIN
COUNT
STC3485E
0.5
3.0 to 3.6
Yes
Yes
1
Yes
8
Supply Voltage (VCC) … … … … … … … … … … … … … … … … … … 5V
Control Input Voltage (/RE, DE) … … … … … … … … … … … -0.3V to 5V
Driver Input Voltage (DI) … … … … … … … … … … … … … … -0.3V to 5V
Driver Output Voltage (A, B) … … … … … … … … … … … … -7V to 12V
Receiver Input Voltage (A, B) … … … … … … … … … … … … -7V to 12V
Receiver Output Voltage (RO) … … … … … … … -0.3V to (VCC + 0.3V)
Continuous Power Dissipation (TA = +70°C)
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) … … … … 727mW
8-Pin SO (derate 5.88mW/°C above +70°) … … … … … … … … 471mW
Operating Temperature Ranges
STC3485EE_ _ … … … … … … … … … … … … … … … -40°C to +85°C
Storage Temperature Range… … … … … … … … … … -65°C to +160°C
Lead Temperature (soldering, 10sec) … … … … … … … … … … +300°C