STC3232E Datasheet Rev.0.1, Dec.2005
Page
of
7
STC International Limited
http://www.mcu-memory.com
3
Electrical Characteristics
(VCC = +3V to +5.5V, C1-C4 = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at
TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DC CHARACTERISTICS (VCC = +3.3V OR +5.5V, TA = +25°C )
VCC Supply Current
ICC
/SHDN = VCC , No Load, TA = +25°C
0.3
1
mA
Shutdown Supply Current
ISHDN
/SHDN = GND, No Load, TA = +25°C
1
10
µA
LOGIC
Input Leakage Current
T_IN, /SHDN, /EN
±1
µA
Input Threshold Low
VIL
T_IN, /SHDN, /EN
0.8
V
Input Threshold High
VIH
T_IN, /SHDN, /EN
2.0
V
Output Voltage Low
VOH
R_OUT; IOUT = 3.2mA
0.4
V
Output Voltage High
VOL
R_OUT; IOUT = -1.0mA
VCC-0.6
VCC-0.1
V
EIA/TIA-232E RECEIVER INPUTS
Input Voltage Range
-25
25
V
Input Threshold Low
TA = +25°C, VCC = 3.3V
0.6
1.1
V
Input Threshold High
TA = +25°C, VCC = 3.3V
1.5
2. 4
V
Input Hysteresis
VCC = 3.3V
0.1
0.2
V
Input Resistance
TA = +25°C, VCC = 3.3V
3
5
7
kO
EIA/TIA-232E TRANSMITTER OUTPUTS
Output Voltage Swing
All drivers loaded with 3kO to ground
±5
±5.4
V
Output Resistance
300
500
O
Output Short Circuit Current
±60
mA
TIMING CHARACTERISTICS
Maximum Data Rate
RL = 3 kO to 7 kO, CL = 50pF to 1000pF,
one transmitter switching
250
kbps
Receiver Propagation Delay
tPLHR, tPHLR
CL= 150pF
0.15
µs
Transmitter
Propagation Delay
tPLHT, tPHLT
RL = 3 kO, CL = 2500pF,
all transmitters loaded
0.1
µs
Transition-Region Slew rate
TA = +25°C, VCC = 3.3V RL = 3 kO to 7 kO,
CL = 50pF to 1000pF,
measured from -3V to +3V or +3V to -3V,
3
6
30
V/µs
ESD & LATCH UP PERFORMANCE
Human Body Model
±15
kV
IEC1000-4-2, Contact Discharge
±8
kV
ESD Protection Voltage
IEC1000-4-2, Air-Gap Discharge
±15
kV
Latch up Performance
±200
mA