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2
Exar Coporation 48720 Kato Road, Fremont CA, 94538 (50) 668-7000 Fax (50) 668-707 www.exar.com
SP506_0_0870
These are stress ratings only and functional operation
of the device at these ratings or any other above those
indicated in the operation sections of the specifications
below is not implied. Exposure to absolute maximum
rating conditions for extended periods of time may
affect reliability.
V
CC.......................................................................+7V
Input Voltages:
Logic............................-0.3V to (V
CC+0.5V)
Drivers.........................-0.3V to (V
CC+0.5V)
Receivers........................................±5.5V
Output Voltages:
Logic............................-0.3V to (V
CC+0.5V)
Drivers................................................±5V
Receivers.....................-0.3V to (V
CC+0.5V)
Storage Temperature.......................-65C to +150C
Power Dissipation per package - 80-pin QFP
(derate 18.3mWC above +70C).................1500mW
STORAGE CONSIDERATIONS
Due to the relatively large package size of the 80-pin
quad flat-pack, storage in a low humidity environment
is preferred. Large high density plastic packages
are moisture sensitive and should be stored in Dry
Vapor Barrier Bags. Prior to usage, the parts should
remain bagged and stored below 40°C and 60%RH.
If the parts are removed from the bag, they should be
used within 48 hours or stored in an environment at
or below 20%RH. If the above conditions cannot be
followed, the parts should be baked for four hours at
25°C in order remove moisture prior to soldering.
Exar ships the 80-pin QFP in Dry Vapor Barrier Bags
with a humidity indicator card and desiccant pack. The
humidity indicator should be below 30%RH.
ABSOLUTE MAXIMUM RATINGS
PARAMETER
MIN
TYP
MAX
UNITS
CONDITIONS
LOGIC INPUTS
V
IL
0.8
Volts
V
IH
2.0
Volts
LOGIC OUTPUTS
V
OL
0.4
Volts
I
OUT = -3.2mA
V
OH
2.4
Volts
I
OUT = .0mA
V.28 DRIVER OUTPUT DC PARAMETERS
Open Circuit Voltage
+/-5
Volts
Per Figure
Loaded Voltage
+/-5.0
+/-5
Volts
Per Figure 2
Short-Circuit Current
+/-00
mA
Per Figure 4
Power-Off Impedance
300
Per Figure 5
V.28 DRIVER OUTPUT AC PARAMETERS (Vcc = +5V for AC Parameters)
Transition Time
.5
s
Per Figure 6; +3V to -3V
Instantaneous Slew Rate
30
V/ s
Per Figure 3
Propagation Delay t
PHL
0.5
5
s
Propagation Delay t
PLH
0.5
5
s
Max. Transmission Rate
20
230
kbps
V.28 RECEIVER INPUT DC PARAMETERS
Input impedance
3
7
k
Per Figure 7
Open-Circuit Bias
+2.0
Volts
Per Figure 8
HIGH Threshold
.7
3.0
Volts
LOW Threshold
0.8
.2
Volts
ELECTRICAL CHARACTERISTICS
T
A = +25°C and VCC = +4.75V to +5.25V unless otherwise noted.