Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510)668-7000 • Fax (510)668-7017 • www.exar.com SP233A,310A,312A_100_051308
2
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional opera-
tion of the device at these ratings or any other above
those indicated in the operation sections of the speci-
cations below are not implied. Exposure to absolute
maximum ratings conditions for extended periods of
time may affect reliability.
Supply Voltage (VCC)....................................................+ 6V
V+........................................................................... (Vcc-0.3V) to +11.0V
V- .............................................................................-11.0V
Input Voltages
Tin.....................................................-0.3V to (Vcc + 0.3V)
Rin............................................................................+/-30V
Output Voltages
Tout...............................................(V+, +0.3V) to (V-, -0.3V
Rout...................................................-0.3V to (Vcc + 0.3V)
Vcc=5V ±10%, 0.1μF charge pump capacitors, Tmin to Tmax, unless otherwise noted, Typical values are Vcc=5V
and Ta=25°C
Short Circuit duration
Tout.....................................................Continuous
Package Power Dissipation:
Plastic DIP...............................................375mW
(derate 7mW/°C above +70°C)
Small Outline...........................................375mW
(derate 7mW/°C above +70°C)
Storage Temperature..................-65°C to +150°C
Lead Temperature (soldering, 10s).......... +300°C
ELECTRICAL CHARACTERISTICS
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
TTL INPUT
Logic Threshold LOW Tin, En, SD, On/OFF 0.8 Volts
Logic Threshold HIGH
Tin, En, SD, On/OFF 2.0 Volts
Logic Pull-Up Current
Tin = 0V 15 200 μA
TTL OUTPUT
Output Voltge LOW iOuT = 3.2ma: Vcc = +5V 0.4 Volts
Output Voltage HIGH
iOuT = -1.0ma 3.5 Volts
Leakage Current;
Ta=25°C
En = Vcc, 0V ≤ VOuT ≤ Vcc
SP310A and SP312A only
0.05 +/-10 μA
RS-232 OUTPUT
Output Voltage Swing
all Transmitter outputs loaded
with 3k ohms to GND
+/-5.0 +/-9V Volts
Output Resistance Vcc = 0V, Vout = +/-2V 300 Ohms
Output Short Circuit Current Innite Duration
+/-18 mA
Maximum Data Rate CL = 2500pF, RL = 3kΩ
120 240 kbps
RS-232 INPUT
Voltage Range -25 +25 Volts
Voltage Threshold LOW
Vcc = 5V,
Ta=25°C
0.8 1.2 Volts
Voltage Threshold HIGH
Vcc = 5V,
Ta=25°C
1.7 2.4 Volts
Hysteresis
Vcc = 5V,
Ta=25°C
0.2 0.5 1.0 Volts
Resistance
Ta=25°C, -25V ≤ Vin ≤ +25V
3 5 7 kΩ
