Datasheet

RS-485 Transceivers with Integrated
100 Ω /120 Ω Termination Resistors
MAX13450E/MAX13451E
_______________________________________________________________________________________ 5
SWITCHING CHARACTERISTICS—SRL = LOW
(V
CC
= +4.5V to +5.5V, V
L
= +1.62V to V
CC
, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
CC
= +5V,
V
L
= +1.8V, and T
A
= +25NC.) (Note 2)
Note 2: All devices are 100% production tested at T
A
= +25°C. Limits over temperature are guaranteed by design.
Note 3: Termination resistance is disabled (TERM = high).
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DRIVER
Driver Propagation Delay
t
DPLH
R
DIFF
= 54I, C
L
= 50pF, Figures 2 and 3
50
ns
t
DPHL
50
Differential Driver Output Skew
|t
DPLH
- t
DPHL
|
t
DSKEW
R
DIFF
= 54I, C
L
= 50pF, Figure 3
6 ns
Driver Differential Output Rise or
Fall Time
t
HL
, t
LH
R
DIFF
= 54I, C
L
= 50pF, Figures 2 and 3
15 ns
Maximum Data Rate DR
MAX
20 Mbps
Driver Enable from Shutdown to
Output High
t
DZH(SHDN)
S2 closed, R
L
= 500I, C
L
= 100pF,
Figures 4 and 5
2000 ns
Driver Enable from Shutdown to
Output Low
t
DZL(SHDN)
S1 closed, R
L
= 500I, C
L
= 100pF,
Figures 4 and 5
2000 ns
Driver Disable Delay t
DLZ
, t
DHZ
Figures 4 and 5 100 ns
Driver Enable Delay t
DZL
, t
DZH
Figures 4 and 5 100 ns
RECEIVER
Receiver Propagation Delay
t
RPLH
C
L
= 15pF, |V
ID
| R 2.0V; t
LH
, t
HL
P 15ns,
Figures 6 and 7
50
ns
t
RPHL
50
Receiver Output Skew t
RSKEW
C
L
= 15pF, Figures 6 and 7 6 ns
Maximum Data Rate DR
MAX
20 Mbps
Receiver Enable to Output High t
RZH
S2 closed, C
L
= 100pF, R
L
= 500I,
Figures 8 and 9
50 ns
Receiver Enable to Output Low t
RZL
S1 closed, C
L
= 100pF, R
L
= 500I,
Figures 8 and 9
50 ns
Receiver Disable Time from High t
RHZ
Figures 8 and 9 50 ns
Receiver Disable Time from Low t
RLZ
Figures 8 and 9 50 ns
Receiver Enable from Shutdown
to Output High
t
RZH(SHDN)
Figures 8 and 9 2000 ns
Receiver Enable from Shutdown
to Output Low
t
RZL(SHDN)
Figures 8 and 9 2000 ns
TERMINATION RESISTOR
Turn-Off Time t
RTZ
Figure 10 120
Fs
Turn-On Time t
RTEN
Figure 10 1
Fs