MAX14938 Datasheet, PDF (6/22 Pages) Maxim Integrated Products – 2.75kVRMS Isolated 20Mbps Half-Duplex PROFIBUS

MAX14938/MAX14939
2.75kV_RMS Isolated 20Mbps Half-Duplex PROFIBUS/
RS-485 Transceivers with ±35kV ESD Protection
Switching Electrical Characteristics (continued)
(VDDA – VGNDA = 1.71V to 5.5V, VDDB – VGNDB = 4.5V to 5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are
at VDDA – VGNDA = 3.3V, VDDB – VGNDB = 5V, VGNDA = VGNDB, and TA = +25°C.) (Note 8)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP MAX UNITS
Driver Enable to Output Low
Driver Disable Time from Low
Driver Disable Time from High
RECEIVER
tDZL
tDLZ
tDHZ
RL = 500Ω, C_L = 50pF, Figure 6
RL = 500Ω, C_L = 50pF, Figure 6
RL = 500Ω, C_L = 50pF, Figure 5
88
ns
80
ns
80
ns
Receiver Propagation Delay
tRPLH, tRPHL CL = 15pF, Figure 7 and 8 (Note 10)
68
ns
Receiver Output Skew
|tRPLH - tRPHL|
tRSKEW
CL = 15pF, Figure 7 and 8
(Note 10)
6
ns
Maximum Data Rate
DRMAX
20
Receiver Enable to Output
High
tRZH
RL = 1kΩ, C_L = 15pF, S2 closed,
Figure 9
Receiver Enable to Output Low
tRZL
RL = 1kΩ, C_L = 15pF, S1 closed,
Figure 9
Receiver Disable Time From
Low
tRLZ
RL = 1kΩ, C_L = 15pF, S1 closed,
Figure 9
Mbps
20
ns
30
ns
20
ns
Receiver Disable Time From
High
tRHZ
RL = 1kΩ, C_L = 15pF, S2 closed,
Figure 9
20
ns
Note 2: All devices are 100% production tested at T_A = +25°C. Specifications over temperature are guaranteed by design.
Note 3: All currents into the device are positive. All currents out of the device are negative. All voltages are referenced to their
respective ground (GNDA or GNDB), unless otherwise noted.
Note 4: V_LDO max indicates voltage capability of the circuit. Power dissipation requirements may limit V_LDO max to a lower value.
Note 5: V_ODPP is the difference in V_OD when TXD is high and when TXD is low.
Note 6: ΔV_OD and ΔV_OC are the changes in V_OD and V_OC, respectively, when the TXD input changes state.
Note 7: The short circuit output current applies to the peak current just prior to foldback current limiting.
Note 8: Not production tested. Guaranteed by design.
Note 9: CMTI is the maximum sustainable common-mode voltage slew rate while maintaining the correct output states. CMTI
applies to both rising and falling common-mode voltage edges. Tested with the transient generator connected between
GNDA and GNDB. ΔV_CM = 1kV.
Note 10: Capacitive load includes test probe and fixture capacitance.
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