Operating Temperature Range .......................... -40°C to +85°C
Junction Temperature .....................................................+150°C
Storage Temperature Range............................ -65°C to +150°C
Lead Temperature (soldering, 10s) ................................+300°C
Soldering Temperature (reflow) ......................................+260°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
(V
CC
= +5.0V ±10%, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
CC
= +5.0V and T
A
= +25NC.) (Note 1)
PARAMETER
DRIVER
V
CC
Supply-Voltage Range
Differential Driver Output
Change in Magnitude of
Differential Output Voltage
Driver Common-Mode Output
Voltage
Change in Magnitude of
Common-Mode Voltage
Input-High Voltage
Input-Low Voltage
Input Hysteresis
Input Current
Input Impedance First Transition
at Power-Up
Input Impedance on First
Transition after POR Delay
Driver Short-Circuit Output
Current
Driver Short-Circuit Foldback
Output Current
Thermal-Shutdown Threshold
Thermal-Shutdown Hysteresis
Input Current (A and B)
RECEIVER
Receiver Differential Threshold
Voltage
Receiver Input Hysteresis
2
SYMBOL
V
CC
CONDITIONS
MIN
4.5
TYP
MAX
5.5
V
CC
V
CC
V
CC
0.2
UNITS
V
V
R
L
= 100I (RS-422), Figure 1
V
OD
R
L
= 54I (RS-485), Figure 1
No load
DV
OD
V
OC
DV
OC
V
IH
V
IL
V
HYS
I
IN1
R
PWUP
R
ft
I
OSD
I
OSDF
T
TS
T
TSH
I
A, B
V
DE
= 0V,
V
CC
= 0V or V
CC
V
IN
= +12V
V
IN
= -7V
R
L
= 100I or 54I, Figure 1 (Note 2)
R
L
= 100I or 54I, Figure 1
R
L
= 100I or 54I, Figure 1 (Note 2)
DE, DI,
RE
DE, DI,
RE
DE, DI,
RE
DE, DI,
RE
DE,
RE = RE =
2V
DE =
RE =
2V
0
P
V
OUT
P
+12V (Note 3)
-7V
P
V
OUT
P
V
CC
(Note 3)
(V
CC
- 1V)
P
V
OUT
P
+12V (Note 3)
-7V
P
V
OUT
P
+1V (Note 3)
3
2
V
V
V
V
V
CC
/2
3
0.2
3
0.8
100
Q1
3.65
7
40
-250
20
-20
175
15
125
-100
8.8
60
250
-40
V
mV
FA
kI
kΩ
mA
mA
NC
NC
FA
V
TH
DV
TH
-7V
P
V
CM
P
+12V
V
A
+ V
B
= 0V
-200
-125
15
-50
mV
mV
Maxim Integrated
MAX14780E
+5.0V, ±30kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceiver
DC ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +5.0V ±10%, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
CC
= +5.0V and T
A
= +25NC.) (Note 1)
PARAMETER
RO Output-High Voltage
RO Output-Low Voltage
Three-State Output Current at
Receiver
Receiver Input Resistance
Receiver Output Short-Circuit
Current
SUPPLY CURRENT
No load, V
RE
= 0V, DE = V
CC
Supply Current
Supply Current in Shutdown
Mode
ESD PROTECTION
Human Body Model
ESD Protection for A and B
Contact Discharge
IEC 61000-4-2
Air-Gap Discharge
IEC 61000-4-2
Q30
Q12
Q15
kV
I
CC
No load,
RE
= V
CC
, DE = V
CC
No load, V
RE
= 0V, V
DE
= 0V
RE
= V
CC
, V
DE
= 0V
1.2
1.2
1.2
2.8
1.8
1.8
1.8
10
FA
mA
SYMBOL
V
OH
V
OL
I
OZR
R
IN
I
OSR
I
O
= -1mA
I
O
= 1mA
0
P
V
O
P
V
CC
-7V
P
V
CM
P
+12V
0V
P
V
RO
P
V
CC
96
P
110
CONDITIONS
MIN
V
CC
-
0.6
TYP
MAX
V
0.4
P
1
V
FA
kI
mA
UNITS
I
SHDN
DRIVER SWITCHING CHARACTERISTICS WITH INTERNAL SRL (500kbps)
(V
CC
= +5.0V ±10%, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
CC
= +5.0V and T
A
= +25NC.) (Note 1)
PARAMETER
Driver Propagation Delay
Driver Differential Output Rise or
Fall Time
Differential Driver Output Skew
|t
DPLH
- t
DPHL
|
Maximum Data Rate
Driver Enable to Output High
Driver Enable to Output Low
Driver Disable Time from Low
Driver Disable Time from High
Driver Enable from Shutdown to
Output High
Driver Enable from Shutdown to
Output Low
Time to Shutdown
t
DZH
t
DZL
t
DLZ
t
DHZ
Figure 4
Figure 5
Figure 5
Figure 4
SYMBOL
t
DPLH
t
DPHL
t
R ,
t
F
t
DSKEW
CONDITIONS
C
L
= 50pF, R
L
= 54I, Figures 2 and 3
C
L
= 50pF, R
L
= 54I, Figures 2 and 3
C
L
= 50pF, R
L
= 54I, Figures 2 and 3
500
2500
2500
100
100
5500
5500
50
340
700
MIN
200
200
250
TYP
MAX
1000
1000
900
140
UNITS
ns
ns
ns
kbps
ns
ns
ns
ns
ns
ns
ns
t
DZH(SHDN)
Figure 4
t
DZL(SHDN)
Figure 5
t
SHDN
Maxim Integrated
3
MAX14780E
+5.0V, ±30kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceiver
RECEIVER SWITCHING CHARACTERISTICS WITH INTERNAL SRL (500kbps)
(V
CC
= +5.0V ±10%, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
CC
= +5.0V and T
A
= +25NC.) (Note 1)
PARAMETER
Receiver Propagation Delay
Receiver Output Skew
|t
RPLH
- t
RPHL
|
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
t
RZL
t
RZH
t
RLZ
t
RHZ
Figure 8
Figure 8
Figure 8
Figure 8
SYMBOL
t
RPLH
t
RPHL
t
RSKEW
CONDITIONS
C
L
= 15pF, Figures 6 and 7
C
L
= 15pF, Figures 6 and 7
500
50
50
50
50
5500
5500
50
340
700
MIN
TYP
MAX
200
200
30
UNITS
ns
ns
kbps
ns
ns
ns
ns
ns
ns
ns
t
RZH(SHDN)
Figure 8
t
RZL(SHDN)
Figure 8
t
SHDN
Note 1:
All currents into the device are positive. All currents out of the device are negative. All voltages are referred to device
ground, unless otherwise noted.
Note 2:
ΔV
OD
and ΔV
OC
are the changes in V
OD
and V
OC
, respectively, when the DI input changes state.
Note 3:
The short-circuit output current applies to peak current just prior to foldback current limiting. The short-circuit foldback
output current applies during current limiting to allow a recovery from bus contention.
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