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XR33156IDEVB Datasheet, PDF (7/19 Pages) Exar Corporation – 60V Fault Tolerant 3.0V to 5.5V RS-485/RS-422 Transceivers
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XR33152/55/56/58
Electrical Characteristics (Continued)
Driver AC Characteristics - XR33156 and XR33158 (20Mbps)
Unless otherwise noted: VCC = 3.0V to 5.5V, TA = TMIN to TMAX. Typical values are at VCC = 5.0V, TA = 25°C.
Symbol
Parameter
Conditions
Min
Typ
Max
tDPLH
tDPHL
|tDPLH-tDPHL|
tDR, tDF
Driver prop. delay (low to high)
Driver prop. delay (high to low)
Differential driver output skew
Driver differential output
rise or fall time
Maximum data rate
tDZH
tDZL
tDHZ
tDLZ
tDZH(SHDN)
tDZL(SHDN)
tSHDN
Driver enable to output high
Driver enable to output low
Driver disable from output high
Driver disable from output low
Driver enable from shutdown to
output high
Driver enable from shutdown to
output low
Time to shutdown
CL = 50pF, RL = 54Ω,
Figure 7
1/tUI, duty cycle 40% to 60%
CL = 50pF, RL = 500Ω,
Figure 8
CL = 50pF, RL = 500Ω,
Figure 8
Notes 1 and 2
25
25
5
15
20
60
60
250
250
2200
2200
50
200
600
Units
ns
ns
ns
ns
Mbps
ns
ns
ns
ns
ns
ns
ns
Receiver AC Characteristics - XR33156 and XR33158 (20Mbps)
Unless otherwise noted: VCC = 3.0V to 5.5V, TA = TMIN to TMAX. Typical values are at VCC = 5.0V, TA = 25°C.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
tRPLH
tRPHL
|tRPLH-tRPHL|
Receiver prop. delay (low to high)
Receiver prop. delay (high to low)
Receiver propagation delay skew
Maximum data rate
tRZH
tRZL
tRHZ
tRLZ
tRZH(SHDN)
tRZL(SHDN)
tSHDN
Receiver enable to output high
Receiver enable to output low
Receiver disable from output high
Receiver disable from output low
Receiver enable from shutdown to
output high
Receiver enable from shutdown to
output low
Time to shutdown
CL = 15pF, VID = ±2V,
VID rise and fall times < 15ns,
Figure 9
1/tUI, duty cycle 40% to 60%
CL = 15pF, RL = 1kΩ,
Figure 10, for XR33156
CL = 15pF, RL = 1kΩ,
Figure 10, for XR33156
Notes 1 and 2, for XR33156
60
ns
60
ns
5
ns
20
Mbps
50
ns
50
ns
50
ns
50
ns
2200
ns
2200
ns
50
200
600
ns
NOTES:
1. The transceivers are put into shutdown by bringing RE high and DE low simultaneously for at least 600ns. If the control inputs are in this state for less than 50ns,
the device is guaranteed to not enter shutdown. If the enable inputs are held in this state for at least 600ns, the device is ensured to be in shutdown. Note that the receiver
and driver enable times increase significantly when coming out of shutdown.
2. This spec is guaranteed by design and bench characterization.
REV2A
7/19
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