MAX488EESA

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Item Description: Single Transmitter/Receiver RS-422/RS-485 8-Pin SOIC N - B
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Technical Document


DISCLAIMER: The information provided herein is solely for informational purposes. Customers must be aware of the suitability of this product for their application, and consider that variable factors such as Manufacturer, Product Category, Date Codes, Pictures and Descriptions may differ from available inventory.

_______________General Description
The MAX481E, MAX483E, MAX485E, MAX487E–MAX491E,
and MAX1487E are low-power transceivers for RS-485 and
RS-422 communications in harsh environments. Each driver
output and receiver input is protected against ±15kV electro-
static discharge (ESD) shocks, without latchup. These parts
contain one driver and one receiver. The MAX483E,
MAX487E, MAX488E, and MAX489E feature reduced slew-
rate drivers that minimize EMI and reduce reflections caused
by improperly terminated cables, thus allowing error-free
data transmission up to 250kbps. The driver slew rates of the
MAX481E, MAX485E, MAX490E, MAX491E, and MAX1487E
are not limited, allowing them to transmit up to 2.5Mbps.
These transceivers draw as little as 120µA supply current
when unloaded or when fully loaded with disabled drivers
(see
Selection Table
). Additionally, the MAX481E,
MAX483E, and MAX487E have a low-current shutdown
mode in which they consume only 0.5µA. All parts operate
from a single +5V supply.
Drivers are short-circuit current limited, and are protected
against excessive power dissipation by thermal shutdown
circuitry that places their outputs into a high-impedance
state. The receiver input has a fail-safe feature that guaran-
tees a logic-high output if the input is open circuit.
The MAX487E and MAX1487E feature quarter-unit-load
receiver input impedance, allowing up to 128 transceivers
on the bus. The MAX488E–MAX491E are designed for full-
duplex communications, while the MAX481E, MAX483E,
MAX485E, MAX487E, and MAX1487E are designed for half-
duplex applications. For applications that are not ESD sen-
sitive see the pin- and function-compatible MAX481,
MAX483, MAX485, MAX487–MAX491, and MAX1487.
________________________Applications
Low-Power RS-485 Transceivers
Low-Power RS-422 Transceivers
Level Translators
Transceivers for EMI-Sensitive Applications
Industrial-Control Local Area Networks
____________________________Features
ESD Protection: ±15kV—Human Body Model
Slew-Rate Limited for Error-Free Data
Transmission (MAX483E/487E/488E/489E)
Low Quiescent Current:
120µA (MAX483E/487E/488E/489E)
230µA (MAX1487E)
300µA (MAX481E/485E/490E/491E)
-7V to +12V Common-Mode Input Voltage Range
Three-State Outputs
30ns Propagation Delays, 5ns Skew
(MAX481E/485E/490E/491E/1487E)
Full-Duplex and Half-Duplex Versions Available
Allows up to 128 Transceivers on the Bus
(MAX487E/MAX1487E)
Current Limiting and Thermal Shutdown for
Driver Overload Protection
MAX481E/MAX483E/MAX485E/MAX487E–MAX491E/MAX1487E
±15kV ESD-Protected, Slew-Rate-Limited,
Low-Power, RS-485/RS-422 Transceivers
________________________________________________________________
Maxim Integrated Products
1
MAX481E
MAX483E
MAX485E
MAX487E
MAX488E
MAX489E
MAX490E
MAX491E
MAX1487E
PART
NUMBER
HALF/FULL
DUPLEX
DATA RATE
(Mbps)
SLEW-RATE
LIMITED
LOW-POWER
SHUTDOWN
RECEIVER/
DRIVER
ENABLE
QUIESCENT
CURRENT
(µA)
NUMBER OF
TRANSMITTERS
ON BUS
PIN
COUNT
Half
Half
Half
Half
Full
Full
Full
Full
Half
2.5
0.25
2.5
0.25
0.25
0.25
2.5
2.5
2.5
No
Yes
No
Yes
Yes
Yes
No
No
No
Yes
Yes
No
Yes
No
No
No
No
No
Yes
Yes
Yes
Yes
No
Yes
No
Yes
Yes
300
120
300
120
120
120
300
300
230
32
32
32
128
32
32
32
32
128
8
8
8
8
8
14
8
14
8
______________________________________________________________Selection Table
19-0410; Rev 3; 7/96
______________Ordering Information
Ordering Information continued on last page.
8 SO0°C to +70°CMAX481ECSA
8 Plastic DIP0°C to +70°C
MAX481ECPA
PIN-PACKAGETEMP. RANGEPART
8 SO-40°C to +85°CMAX481EESA
8 Plastic DIP-40°C to +85°CMAX481EEPA
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
MAX481E/MAX483E/MAX485E/MAX487E–MAX491E/MAX1487E
±15kV ESD-Protected, Slew-Rate-Limited,
Low-Power, RS-485/RS-422 Transceivers
2 _______________________________________________________________________________________
Supply Voltage (V
CC
).............................................................12V
Control Input Voltage (
R
E
, DE)...................-0.5V to (V
CC
+ 0.5V)
Driver Input Voltage (DI).............................-0.5V to (V
CC
+ 0.5V)
Driver Output Voltage (Y, Z; A, B) ..........................-8V to +12.5V
Receiver Input Voltage (A, B).................................-8V to +12.5V
Receiver Output Voltage (RO)....................-0.5V to (V
CC
+ 0.5V)
Continuous Power Dissipation (T
A
= +70°C)
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) ....727mW
14-Pin Plastic DIP (derate 10.00mW/°C above +70°C)..800mW
8-Pin SO (derate 5.88mW/°C above +70°C).................471mW
14-Pin SO (derate 8.33mW/°C above +70°C)...............667mW
Operating Temperature Ranges
MAX4_ _C_ _/MAX1487EC_ A .............................0°C to +70°C
MAX4_ _E_ _/MAX1487EE_ A...........................-40°C to +85°C
Storage Temperature Range.............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
DC ELECTRICAL CHARACTERISTICS
(V
CC
= 5V ±5%, T
A
= T
MIN
to T
MAX
, unless otherwise noted.) (Notes 1, 2)
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.
ABSOLUTE MAXIMUM RATINGS
PARAMETER SYMBOL MIN TYP MAX UNITS
Driver Common-Mode Output
Voltage
V
OC
3 V
Change in Magnitude of Driver
Differential Output Voltage for
Complementary Output States
V
OD
0.2 V
Change in Magnitude of Driver
Common-Mode Output Voltage
for Complementary Output States
V
OD
0.2 V
Input High Voltage V
IH
2.0 V
Input Low Voltage V
IL
0.8 V
Input Current I
IN1
±2 µA
Differential Driver Output (no load) V
OD1
5 V
2
V
Differential Driver Output
(with load)
V
OD2
1.5 5
1.0
-0.8
mA
0.25
mA
-0.2
Receiver Differential Threshold
Voltage
-0.2 0.2 V
Receiver Input Hysteresis V
TH
70 mV
Receiver Output High Voltage V
OH
3.5
Receiver Output Low Voltage V
OL
0.4
V
Three-State (high impedance)
Output Current at Receiver
I
OZR
±1 µA
12 k
CONDITIONS
DE = 0V;
V
CC
= 0V or 5.25V,
all devices except
MAX487E/MAX1487E
R = 27or 50, Figure 8
R = 27or 50, Figure 8
R = 27or 50, Figure 8
DE, DI,
R
E
MAX487E/MAX1487E,
DE = 0V, V
CC
= 0V or 5.25V
DE, DI,
R
E
DE, DI,
R
E
-7V V
CM
12V
V
CM
= 0V
I
O
= -4mA, V
ID
= 200mV
I
O
= 4mA, V
ID
= -200mV
R = 50(RS-422)
0.4V V
O
2.4V
R = 27(RS-485), Figure 8
-7V V
CM
12V, all devices except
MAX487E/MAX1487E
Receiver Input Resistance R
IN
-7V V
CM
12V, MAX487E/MAX1487E 48 k
V
TH
I
IN2
Input Current
(A, B)
V
IN
= 12V
V
IN
= -7V
V
IN
= 12V
V
IN
= -7V
V
MAX481E/MAX483E/MAX485E/MAX487E–MAX491E/MAX1487E
±15kV ESD-Protected, Slew-Rate-Limited,
Low-Power, RS-485/RS-422 Transceivers
_______________________________________________________________________________________ 3
SWITCHING CHARACTERISTICS—MAX481E/MAX485E, MAX490E/MAX491E, MAX1487E
(V
CC
= 5V ±5%, T
A
= T
MIN
to T
MAX
, unless otherwise noted.) (Notes 1, 2)
DC ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 5V ±5%, T
A
= T
MIN
to T
MAX
, unless otherwise noted.) (Notes 1, 2)
mA
7950V V
O
V
CC
I
OSR
Receiver Short-Circuit Current
mA35 250-7V V
O
12V (Note 4)I
OSD2
Driver Short-Circuit Current,
V
O
= Low
mA35 250-7V V
O
12V (Note 4)I
OSD1
Driver Short-Circuit Current,
V
O
= High
MAX1487E,
R
E
= 0V or V
CC
250 400
350 650
CONDITIONS UNITSMIN TYP MAXSYMBOLPARAMETER
230 400
300 500
MAX481E/MAX485E,
R
E
= 0V or V
CC
500 900
MAX490E/MAX491E,
DE, DI,
R
E
= 0V or V
CC
300 500
MAX488E/MAX489E,
DE, DI,
R
E
= 0V or V
CC
120 250
DE = V
CC
300 500DE = 0V
DE = V
CC
DE = 0V
µAMAX481E/483E/487E, DE = 0V,
R
E
= V
CC
0.5 10I
SHDN
Supply Current in Shutdown
120 250
I
CC
No-Load Supply Current
(Note 3)
DE = V
CC
DE = 0V
MAX483E
MAX487E
MAX483E/MAX487E,
R
E
= 0V or V
CC
µA
52025MAX490EC/E, MAX491EC/E
MAX481E, MAX485E, MAX1487E
Driver Rise or Fall Time t
R
, t
F
32040
Figures 10 and 12,
R
DIFF
= 54,
C
L1
= C
L2
= 100pF
MAX490EC/E, MAX491EC/E
Figures 11 and 13, C
L
= 15pF, S2 closed
Figures 11 and 13, C
L
= 15pF, S1 closed
Figures 11 and 13, C
L
= 100pF, S1 closed
Figures 11 and 13, C
L
= 100pF, S2 closed
PARAMETER SYMBOL MIN TYP MAX UNITS
Driver Enable to Output High t
ZH
45 70
Receiver Input to Output t
PLH
, t
PHL
Driver Output Skew to Output
ns
Driver Enable to Output Low t
ZL
45 70 ns
Driver Disable Time from Low t
LZ
45 70
ns
| t
PLH
- t
PHL
| Differential
Receiver Skew
Driver Disable Time from High
t
SKD
t
HZ
45 70
5 ns
20 60 200
Receiver Enable to Output Low t
ZL
20 50
nsReceiver Enable to Output High
Driver Input to Output
t
ZH
20 50
nsReceiver Disable Time from Low t
LZ
20 50
t
PLH
10 40 60
nsReceiver Disable Time from High t
HZ
20 50
MbpsMaximum Data Rate f
MAX
2.5
ns
Time to Shutdown t
SHDN
50 200 600
t
SKEW
510
ns
CONDITIONS
Figures 10 and 14,
R
DIFF
= 54,
C
L1
= C
L2
= 100pF
Figures 10 and 14, R
DIFF
= 54,
C
L1
= C
L2
= 100pF
Figures 9 and 15, C
RL
= 15pF, S1 closed
Figures 9 and 15, C
RL
= 15pF, S2 closed
Figures 9 and 15, C
RL
= 15pF, S1 closed
Figures 9 and 15, C
RL
= 15pF, S2 closed
MAX481E (Note 5)
Figures 10 and 12, R
DIFF
= 54,
C
L1
= C
L2
= 100pF
MAX481E, MAX485E, MAX1487E
ns
Figures 10 and 12, R
DIFF
= 54, C
L1
= C
L2
= 100pF
t
PHL
10 40 60
ns
ns
ns
20 60 150
ns
kV±15A, B, Y and Z pins, tested using Human Body ModelESD Protection
123456NEXT

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