XR32220 Datasheet, PDF (4/13 Pages) Exar Corporation – 2-Driver/2-Receiver Intelligent RS-232 Transceiver

XR32220
Symbol
Parameter
Conditions
Min
Typ
Max
Units
RX_STSL
Receiver Threshold to STATUS low
level
•
-0.3
+0.3
V
t_STSH
Receiver Threshold to STATUS high Figure 11
0.2
s
t_STSL
Receiver Threshold to STATUS low
Figure 11
30
s
t_ONLINE
Receiver Thresholds to Drivers
Enabled
Figure 11, (charge pump fully dis-
charged when receiver threshold
crossed)
30
s
t_OFFLINE
Receiver Thresholds to Drivers Dis-
abled
Figure 11
35
s
TIMING CHARACTERISTICS
f_MAX
Maximum Output Frequency (Speed R_L = 3K, C_L = 250pF, 1 driver active
•
1000
U)
Kbps
Maximum Output Frequency (Speed R_L = 3K, C_L = 1000pF, 1 driver active •
250
B)
Kbps
t_PHL
Receiver Propagation Delay (high to Receiver input (<10ns rise/fall) to
low)
Receiver output, C_L = 150pF
0.15
s
t_PLH
Receiver Propagation Delay (low to Receiver input (<10ns rise/fall) to
high)
Receiver output, C_L = 150pF
0.15
s
t_RXSKEW Receiver Skew
|t_{PHL -} t_PLH|
50
ns
t_RXOE
Receiver Output Enable Time
Normal operation
200
ns
t_RXOD
Receiver Output Disable Time
Normal operation
200
ns
t_TXSKEW Driver Skew (Speed U)
|t_{PHL -} t_PLH| (Driver propagation delays) •
50
100
ns
Driver Skew (Speed B)
|t_{PHL -} t_PLH| (Driver propagation delays) •
100
500
ns
TX_SLEW
Transition-Region Slew Rate (Speed
U)
V_CC = 3.3V, R_L = 3Kto 7K, C_L =
150pF to 250pF, Measured from -3.0V
to +3.0V or +3.0V to -3.0V
90
V/s
Transition-Region Slew Rate (Speed V_CC = 3.3V, R_L = 3Kto 7K,, C_L =
•
6
B)
150pF to 1000pF, Measured from -3.0V
to +3.0V or +3.0V to -3.0V
30
V/s
* Limits applying over the full operating temperature range are denoted by a “•”.
© 2014 Exar Corporation
4 / 13
exar.com/XR32220
Rev 1A