MAX14780E Maxim Integrated Products, MAX14780E Datasheet - Page 4

• Manufacturer Part Number: MAX14780E
• Description: RS-485/RS-422 Transceiver
• Manufacturer: Maxim Integrated Products

RECEIVER SWITCHING CHARACTERISTICS WITH INTERNAL SRL (500kbps)
(V
Note 1: All currents into the device are positive. All currents out of the device are negative. All voltages are referred to device
Note 2: ΔV
Note 3: The short-circuit output current applies to peak current just prior to foldback current limiting. The short-circuit foldback
Figure 1. Driver DC Test Load
Figure 2. Driver Timing Test Circuit
+5.0V, ±30kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceiver
4
Receiver Propagation Delay
Receiver Output Skew
|t
Maximum Data Rate
Receiver Enable to Output Low
Receiver Enable to Output High
Receiver Disable Time from Low
Receiver Disable Time from High
Receiver Enable from Shutdown
to Output High
Receiver Enable from Shutdown
to Output Low
Time to Shutdown
CC
RPLH
______________________________________________________________________________________
= +5.0V ±10%, T
- t
ground, unless otherwise noted.
output current applies during current limiting to allow a recovery from bus contention.
RPHL
PARAMETER
OD
|
and ΔV
DI
B
A
DE
V
CC
V
OC
OD
A
= T
B
A
are the changes in V
MIN
R
R
L
L
V
to T
/2
/2
OD
t
MAX
t
RZH(SHDN)
SYMBOL
RZL(SHDN)
t
RSKEW
t
t
t
SHDN
RPLH
RPHL
t
t
t
t
V
RZH
RHZ
RZL
RLZ
, unless otherwise noted. Typical values are at V
OC
R
L
OD
C
C
Figure 8
Figure 8
Figure 8
Figure 8
Figure 8
Figure 8
and V
C
L
L
L
= 15pF, Figures 6 and 7
= 15pF, Figures 6 and 7
OC
, respectively, when the DI input changes state.
CONDITIONS
Figure 3. Driver Propagation Delays
V
DIFF
DI
V
-V
0
V
CC
Y
O
O
0
Z
Test Circuits and Waveforms
V
V
CC
O
1/2 V
t
R
10%
/2
O
CC
t
SKEW
= +5.0V and T
90%
t
DPLH
= | t
MIN
500
50
V
DPLH
DIFF
= V (B) - V (A)
- t
DPHL
TYP
340
A
t
|
DPHL
= +25NC.) (Note 1)
t
F
90%
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MAX
5500
5500
200
200
700
30
50
50
50
50
10%
UNITS
kbps
1/2 V
ns
ns
ns
ns
ns
ns
ns
ns
ns
O