19-2536; Rev 1; 7/07
±15kV ESD-Protected, Fail-Safe, 20Mbps, Slew-Rate-
Limited RS-485/RS-422 Transceivers in a SOT
General Description
The MAX3060E/MAX3061E/MAX3062E high-speed
transceivers for RS-485/RS-422 communication contain
one driver and one receiver. These devices feature fail-
safe circuitry, which guarantees a logic-high receiver
output when the receiver inputs are open or shorted.
This means that the receiver output is a logic high if all
transmitters on a terminated bus are disabled (high
impedance). These devices also feature hot-swap cir-
cuitry that eliminates data glitches during hot insertion.
The MAX3060E features slew-rate-limited drivers that
minimize EMI and reduce reflections caused by
improperly terminated cables, allowing error-free data
transmission up to 115kbps. The MAX3061E, also slew-
rate limited, transmits up to 500kbps. The MAX3062E
driver is not slew-rate limited, allowing transmit speeds
up to 20Mbps. All transmitter outputs are protected to
±15kV using the Human Body Model.
These transceivers typically draw 910µA of supply
current when unloaded, or 790µA when fully loaded
with the drivers disabled.
All devices have a 1/8-unit-load receiver input imped-
ance that allows up to 256 transceivers on the bus. These
devices are intended for half-duplex communication.
Features
♦
True Fail-Safe Receiver While Maintaining
EIA/TIA-485 Compatibility
♦
Enhanced Slew-Rate Limiting Facilitates
Error-Free Data Transmission (MAX3060E and
MAX3061E)
♦
1nA Low-Current Shutdown Mode
♦
Hot-Swappable for Telecom Applications
♦
ESD Protection: ±15kV Human Body Model
♦
Allow Up to 256 Transceivers on the Bus
♦
Space-Saving 8-Pin SOT23 Package
MAX3060E/MAX3061E/MAX3062E
Ordering Information
PART
MAX3060EEKA-T
MAX3060EEKA#T
MAX3061EEKA-T
MAX3061EEKA#T
MAX3062EEKA-T
MAX3062EEKA#T
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
8 SOT23-8
8 SOT23-8
8 SOT23-8
8 SOT23-8
8 SOT23-8
8 SOT23-8
TOP
MARK
AAKI
AEPA*
AAKJ
AEPB*
AAKK
AEPC*
Applications
RS-422/RS-485 Communications
Level Translators
Transceivers for EMI-Sensitive Applications
Industrial-Control Local-Area Networks
*Indicates
an RoHS-compliant part
T = Tape and Reel
Selector Guide
PART
MAX3060E
MAX3061E
MAX3062E
DATA
RATE
(Mbps)
0.115
0.5
20
SLEW-
RATE
LIMITED
Yes
Yes
No
TRANSCEIVERS
ON BUS
256
256
256
Typical Operating Circuit/Pin Configuration
+5V
TOP VIEW
RO
1
R
8 V
CC
7 B
Rt
6
A
5 GND
0.1μF
MAX3060E
MAX3061E
MAX3062E
B
Rt
A
R
DE
D
DI
RE 2
DE 3
DI 4
D
RO
RE
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim's website at www.maxim-ic.com.
±15kV ESD-Protected, Fail-Safe, 20Mbps, Slew-Rate-
Limited RS-485/RS-422 Transceivers in a SOT
MAX3060E/MAX3061E/MAX3062E
ABSOLUTE MAXIMUM RATINGS
All Voltages with Respect to GND
Supply Voltage (V
CC
) ............................................................+7V
Input Voltage (RE, DE, DI)..........................-0.3V to (V
CC
+ 0.3V)
Driver Output/Receiver Input Voltage (A, B) .......-7.5V to +12.5V
Receiver Output Voltage (RO)....................-0.3V to (V
CC
+ 0.3V)
Continuous Power Dissipation (T
A
= +70°C)
8-Pin SOT23 (derate 8.9mW/°C above +70°C)............714mW
Operating Temperature Range
MAX306_EE_ _ ................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°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
= +5V ±5%, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
CC
= +5V and T
A
= +25°C.) (Notes 1, 2)
PARAMETER
DRIVER
Differential Driver Output
(No Load)
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
DI Input Hysteresis
Input Current
Hot-Swap Driver Input Current
Input Current (A and B)
Driver Short-Circuit Output
Current
ESD Protection for A, B
V
OD1
V
OD2
ΔV
OD
V
OC
ΔV
OC
V
IH
V
IL
V
HYS
I
IN1
I
HOTSWAP
I
IN2
V
OD1
DE, DI,
RE
DE,
RE
(Note 4)
DE = GND,
V
CC
= GND or 5.25V
V
IN
= +12V
V
IN
= -7V
-100
±15
±7
±7
±15
kV
±250
V
CC
= 5V
Figure 1, R = 50Ω (RS-422)
Figure 1, R = 27Ω (RS-485)
Figure 1, R = 50Ω or R = 27Ω (Note 3)
Figure 1, R = 50Ω or R = 27Ω
Figure 1, R = 50Ω or R = 27Ω (Note 3)
DE, DI,
RE
DE, DI,
RE
100
±1
±200
125
2.0
0.8
2.0
1.5
0.2
3
0.2
5
V
V
V
V
V
V
V
mV
µA
µA
µA
mA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
-7V
≤
V
OUT
≤
+12V, T
A
= +25°C (Note 5)
IEC 1000-4-2 Air-Gap Discharge
IEC 1000-4-2 Contact Discharge
Human Body Model
2
_______________________________________________________________________________________
±15kV ESD-Protected, Fail-Safe, 20Mbps, Slew-Rate-
Limited RS-485/RS-422 Transceivers in a SOT
MAX3060E/MAX3061E/MAX3062E
DC ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +5V ±5%, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
CC
= +5V and T
A
= +25°C.) (Notes 1, 2)
PARAMETER
RECEIVER
Receiver Differential Threshold
Voltage
Receiver Input Hysteresis
Receiver Output High Voltage
Receiver Output Low Voltage
Three-State Output Current at
Receiver
Receiver Input Resistance
Receiver Output Short-Circuit
Current
SUPPLY CURRENT
Supply Current
Supply Current in Shutdown
Mode
I
CC
I
SHDN
No load,
DI = GND or V
CC
DE = GND,
RE
= V
CC
DE =
RE
= GND
DE =
RE
= V
CC
790
910
0.001
1400
1500
1
µA
µA
V
TH
ΔV
TH
V
OH
V
OL
I
OZR
R
IN
I
OSR
I
O
= -4mA, V
ID
= -50mV
I
O
= 4mA, V
ID
= -200mV
0V
≤
V
O
≤
V
CC
-7V
≤
V
CM
≤
+12V
0V
≤
V
RO
≤
V
CC
96
±8
±80
0.01
V
CC
- 1.5
0.4
±1
-7V
≤
VCM
≤
+12V
-200
-125
25
-50
mV
mV
V
V
µA
kΩ
mA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
_______________________________________________________________________________________
3
±15kV ESD-Protected, Fail-Safe, 20Mbps, Slew-Rate-
Limited RS-485/RS-422 Transceivers in a SOT
MAX3060E/MAX3061E/MAX3062E
SWITCHING CHARACTERISTICS—MAX3060E
(V
CC
= +5V ±5%, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
CC
= +5V and T
A
= +25°C.) (Notes 1, 2)
PARAMETER
Driver Input to Output
Driver Output Skew
(t
DPLH
- t
DPHL
)
Driver Rise or Fall Time
Maximum Data Rate
Driver Enable to Output High
Driver Enable to Output Low
Driver Disable Time from Low
Driver Disable Time from High
Receiver Input to Output
Differential Receiver Skew
(t
RPLH
- t
RPHL
)
Receiver Enable to Output Low
Receiver Enable to Output High
Receiver Disable Time from Low
Receiver Disable Time from High
Time to Shutdown
Driver Enable from Shutdown to
Output High
Driver Enable from Shutdown to
Output Low
Receiver Enable from Shutdown
to Output High
Receiver Enable from Shutdown
to Output Low
SYMBOL
t
DPLH
, t
DPHL
t
DSKEW
t
DR
, t
DF
f
MAX
t
DZH
t
DZL
t
DLZ
t
DHZ
t
RPLH
,
t
RPHL
t
RSKD
t
RZL
t
RZH
t
RLZ
t
RHZ
t
SHDN
Figures 4 and 6, C
L
= 100pF, S2 closed
Figures 4 and 6, C
L
= 100pF, S1 closed
Figures 4 and 6, C
L
= 15pF, S1 closed
Figures 4 and 6, C
L
= 15pF, S2 closed
Figures 7 and 9; | V
ID
|
≥
2.0V;
rise and fall time of V
ID
≤
4ns, C
L
= 15pF
Figures 7 and 9; | V
ID
|
≥
2.0V;
rise and fall time of V
ID
≤
4ns, C
L
= 15pF
Figures 2 and 8, C
L
= 15pF, S1 closed
Figures 2 and 8, C
L
= 15pF, S2 closed
Figures 2 and 8, C
L
= 15pF, S1 closed
Figures 2 and 8, C
L
= 15pF, S2 closed
(Note 6)
50
180
-10
CONDITIONS
Figures 3 and 5, R
DIFF
= 54Ω,
C
DIFF
= 50pF
Figures 3 and 5, R
DIFF
= 54Ω,
C
DIFF
= 50pF
Figures 3 and 5, R
DIFF
= 54Ω,
C
DIFF
= 50pF
MIN
1.0
-200
1.3
115
0.6
0.5
60
85
47
-3
1.5
1.5
200
200
80
+10
50
50
50
50
600
2
2
1.5
1.5
TYP
1.7
-7
1.85
MAX
2.4
+200
2.5
UNITS
µs
ns
µs
kbps
µs
µs
ns
ns
ns
ns
ns
ns
ns
ns
ns
µs
µs
µs
µs
t
DZH(SHDN)
Figures 4 and 6, C
L
= 100pF, S2 closed
t
DZL(SHDN)
Figures 4 and 6, C
L
= 100pF, S1 closed
t
RZH(SHDN)
Figures 2 and 8, C
L
= 15pF, S2 closed
t
RZL(SHDN)
Figures 2 and 8, C
L
= 15pF, S1 closed
4
_______________________________________________________________________________________
±15kV ESD-Protected, Fail-Safe, 20Mbps, Slew-Rate-
Limited RS-485/RS-422 Transceivers in a SOT
SWITCHING CHARACTERISTICS—MAX3061E
(V
CC
= +5V ±5%, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
CC
= +5V and T
A
= +25°C.) (Notes 1, 2)
PARAMETER
Driver Input to Output
Driver Output Skew
(t
DPLH
- t
DPHL
)
Driver Rise or Fall Time
Maximum Data Rate
Driver Enable to Output High
Driver Enable to Output Low
Driver Disable Time from Low
Driver Disable Time from High
Receiver Input to Output
Differential Receiver Skew
(t
RPLH
- t
RPHL
)
Receiver Enable to Output Low
Receiver Enable to Output High
Receiver Disable Time from Low
Receiver Disable Time from High
Time to Shutdown
Driver Enable from Shutdown to
Output High
Driver Enable from Shutdown to
Output Low
Receiver Enable from Shutdown
to Output High
Receiver Enable from Shutdown
to Output Low
SYMBOL
t
DPLH
,
t
DPHL
t
DSKEW
t
DR
, t
DF
f
MAX
t
DZH
t
DZL
t
DLZ
t
DHZ
t
RPLH
,
t
RPHL
t
RSKD
t
RZL
t
RZH
t
RLZ
t
RHZ
t
SHDN
t
DZH(SHDN
Figures 4 and 6, C
L
= 100pF, S2 closed
Figures 4 and 6, C
L
= 100pF, S1 closed
Figures 4 and 6, C
L
= 15pF, S1 closed
Figures 4 and 6, C
L
= 15pF, S2 closed
Figures 7 and 9; | V
ID
|
≥
2.0V;
rise and fall time of V
ID
≤
4ns, C
L
= 15pF
Figures 7 and 9; | V
ID
|
≥
2.0V;
rise and fall time of V
ID
≤
4ns, C
L
= 15pF
Figures 2 and 8, C
L
= 15pF, S1 closed
Figures 2 and 8, C
L
= 15pF, S2 closed
Figures 2 and 8, C
L
= 15pF, S1 closed
Figures 2 and 8, C
L
= 15pF, S2 closed
(Note 6)
Figures 4 and 6, C
L
= 100pF, S2 closed
50
180
-10
CONDITIONS
Figures 3 and 5, R
DIFF
= 54Ω,
C
DIFF
= 50pF
Figures 3 and 5, R
DIFF
= 54Ω,
C
DIFF
= 50pF
Figures 3 and 5, R
DIFF
= 54Ω,
C
DIFF
= 50pF
MIN
250
-100
200
500
330
200
60
80
47
-3
1000
1000
200
200
80
+10
50
50
50
50
600
1.5
1.5
1.5
1.5
TYP
470
-4
530
MAX
800
+100
750
UNITS
ns
ns
ns
kbps
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
µs
µs
µs
µs
MAX3060E/MAX3061E/MAX3062E
t
DZL(SHDN)
Figures 4 and 6, C
L
= 100pF, S1 closed
t
RZH(SHDN)
Figures 2 and 8, C
L
= 15pF, S2 closed
t
RZL(SHDN)
Figures 2 and 8, C
L
= 15pF, S1 closed
_______________________________________________________________________________________
5
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