
5
Maxim Integrated
High-ESD Profibus RS-485 Transceiver
MAX14770E
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +5V Q10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V, TA = +25NC.) (Note 2)
Note 2: Devices are production tested at TA = +25NC. Specifications over temperature limits are guaranteed by design.
Note 3: VODPP is the difference in VOD, with the DI at high and DI at low.
Note 4: DVOD and DVOC are the changes in |VOD| and |VOC|, respectively, with the DI at high and DI at low.
Note 5: The short-circuit output current applies to peak current just prior to foldback current limiting; the short-circuit foldback out-
put current applies during current limiting to allow a recovery from bus contention.
Note 6: Shutdown is enabled by bringing RE high and DE low. If the enable inputs are in this state for less than 50ns, the device
is guaranteed not to enter shutdown. If the enable inputs are in this state for at least 800ns, the device is guaranteed to
have entered shutdown.
Note 7: Capacitive load includes test probe and fixture capacitance.
Note 8: Guaranteed by characterization; not production tested.
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
RECEIVER SWITCHING CHARACTERISTICS
Receiver Propagation
Delay
tRPLH
CL = 15pF; Figures 8 and 9 (Note 7)
28
ns
tRPHL
Receiver Output
Skew
tRSKEW
CL = 15pF; Figures 8 and 9 (Notes 7, 8)
2
ns
Maximum Data Rate
20
Mbps
Receiver Enable to
Output High
tRZH
S2 closed; RL = 1kI, CL = 15pF; Figure 10
30
ns
Receiver Enable to
Output Low
tRZL
S1 closed; RL = 1kI, CL = 15pF; Figure 10
30
ns
Receiver Disable
Time from Low
tRLZ
S1 closed; RL = 1kI, CL = 15pF; Figure 10
30
ns
Receiver Disable
Time from High
tRHZ
S2 closed; RL = 1kI, CL = 15pF; Figure 10
30
ns
Receiver Enable from
Shutdown to Output
High
tRZL(SHDN)
S1 closed; RL = 1kI, CL = 15pF; Figure 10
(Notes 6, 7)
100
F
s
Receiver Enable from
Shutdown to Output
Low
tRZH(SHDN)
S2 closed; RL = 1kI, CL = 15pF; Figure 10
(Notes 6, 7)
100
F
s
Time to Shutdown
tSHDN
(Note 6)
50
800
ns