XR32220_17 Datasheet, PDF (5/15 Pages) Exar Corporation – 2-Driver/2-Receiver Intelligent RS-232 Transceiver with 1.65V to 5.5V Interface

XR32220
Electrical Characteristics (Continued)
Unless otherwise noted: T_A = -40°C to +125°C, V_CC = 3.3V ± 10% or 5.0V ± 10%, V_L = V_CC. Limits applying over the full
operating temperature range are denoted by a •.
Symbol
Parameter
Conditions
• Min
Typ
Max Units
AUTO ON-LINE CIRCUITRY CHARACTERISTICS (ONLINE = GND, SHUTDOWN = V_L, V_L = V_CC)
RX_STSH
Receiver Threshold to STATUS high level
• -2.7
+2.7
V
RX_STSL
Receiver Threshold to STATUS low level
• -0.3
+0.3
V
t_STSH
Receiver Threshold to STATUS high
Figure 11
0.2
μs
t_STSL
t_ONLINE
Receiver Threshold to STATUS low
Receiver Thresholds to Drivers Enabled
Figure 11
Figure 11, (charge pump fully
discharged when receiver threshold
crossed)
30
μs
30
μs
t_OFFLINE
Receiver Thresholds to Drivers Disabled Figure 11
35
μs
TIMING CHARACTERISTICS
f_MAX
t_PHL
t_PLH
Maximum Output Frequency (Speed U) R_L = 3KΩ, C_L = 250pF, 1 driver active
• 1000
Maximum Output Frequency (Speed B) R_L = 3KΩ, CL = 1000pF, 1 driver active • 250
Receiver Propagation Delay (high to low)
Receiver input (<10ns rise/fall) to
Receiver output, C_L = 150pF
0.15
Receiver Propagation Delay (low to high)
Receiver input (<10ns rise/fall) to
Receiver output, C_L = 150pF
0.15
Kbps
Kbps
μs
μs
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
TX_SLEW
Driver Skew (Speed U)
|t_PHL - t_PLH| (Driver propagation delays) •
Driver Skew (Speed B)
|t_PHL - t_PLH| (Driver propagation delays) •
Transition-Region Slew Rate (Speed U)
V_CC = 3.3V, R_L = 3KΩ to 7KΩ, C_L =
150pF to 250pF, Measured from -3.0V
to +3.0V or +3.0V to -3.0V
V_CC = 3.3V, R_L = 3KΩ to 7KΩ, C_L =
Transition-Region Slew Rate (Speed B) 150pF to 1000pF, Measured from -3.0V •
6
to +3.0V or +3.0V to -3.0V
50
100
ns
100
500
ns
90
V/μs
30
V/μs
REV1B
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