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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX3485 Datasheet

3.3V-Powered / 10Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers

No Preview Available !

AVAILABLE
MAX3483/MAX3485/MAX3486/
MAX3488/MAX3490/MAX3491
3.3V-Powered, 10Mbps and Slew-Rate-Limited
True RS-485/RS-422 Transceivers
_______________General Description ____________________________Features
The MAX3483, MAX3485, MAX3486, MAX3488,
MAX3490, and MAX3491 are 3.3V, low-power trans-
ceivers for RS-485 and RS-422 communication. Each
part contains one driver and one receiver. The
MAX3483 and MAX3488 feature slew-rate-limited dri-
vers that minimize EMI and reduce reflections caused
by improperly terminated cables, allowing error-free
data transmission at data rates up to 250kbps. The par-
tially slew-rate-limited MAX3486 transmits up to
2.5Mbps. The MAX3485, MAX3490, and MAX3491
transmit at up to 10Mbps.
Drivers are short-circuit current limited and are protect-
ed against excessive power dissipation by thermal
shutdown circuitry that places the driver outputs into a
high-impedance state. The receiver input has a fail-safe
feature that guarantees a logic-high output if both
inputs are open circuit.
The MAX3488, MAX3490, and MAX3491 feature full-
duplex communication, while the MAX3483, MAX3485,
and MAX3486 are designed for half-duplex communi-
cation.
________________________Applications
Low-Power RS-485/RS-422 Transceivers
Telecommunications
Transceivers for EMI-Sensitive Applications
Industrial-Control Local Area Networks
Functional Diagrams
o Operate from a Single 3.3V Supply—
No Charge Pump!
o Interoperable with +5V Logic
o 8ns Max Skew (MAX3485/MAX3490/MAX3491)
o Slew-Rate Limited for Errorless Data Transmission
(MAX3483/MAX3488)
o 2nA Low-Current Shutdown Mode
(MAX3483/MAX3485/MAX3486/MAX3491)
o -7V to +12V Common-Mode Input Voltage Range
o Allows up to 32 Transceivers on the Bus
o Full-Duplex and Half-Duplex Versions Available
o Industry Standard 75176 Pinout
(MAX3483/MAX3485/MAX3486)
o Current-Limiting and Thermal Shutdown for
Driver Overload Protection
______________Ordering Information
PART
TEMP. RANGE PIN-PACKAGE
MAX3483CPA
0°C to +70°C
8 Plastic DIP
MAX3483CSA
0°C to +70°C
8 SO
MAX3483C/D
0°C to +70°C
Dice*
MAX3483EPA
-40°C to +85°C
8 Plastic DIP
MAX3483ESA
-40°C to +85°C
8 SO
MAX3485CPA
0°C to +70°C
8 Plastic DIP
MAX3485CSA
0°C to +70°C
8 SO
MAX3485C/D
0°C to +70°C
Dice*
MAX3485EPA
-40°C to +85°C
8 Plastic DIP
MAX3485ESA
-40°C to +85°C
8 SO
Ordering Information continued at end of data sheet.
* Contact factory for for dice specifications.
______________________________________________________________Selection Table
PART
NUMBER
GUARANTEED
DATA RATE
(Mbps)
SUPPLY
VOLTAGE
(V)
HALF/FULL
DUPLEX
MAX3483
0.25
Half
MAX3485
10
Half
MAX3486
2.5
PinMCAoXn3fi4g8u8rations ap0p.e2a5r at end of3d.0attao s3h.6eet.
Half
Full
FunMcAtiXon3a4l9D0iagrams c1o0ntinued at end of data sheet. Full
UCMSPAiXs3a4t9ra1demark of M10axim Integrated Products, Inc. Full
SLEW-RATE
LIMITED
Yes
No
Yes
Yes
No
No
DRIVER/
RECEIVER
ENABLE
Yes
Yes
Yes
No
No
Yes
SHUTDOWN
CURRENT
(nA)
2
2
2
2
PIN
COUNT
8
8
8
8
8
14
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-0333; Rev 0; 12/94


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX3485 Datasheet

3.3V-Powered / 10Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers

No Preview Available !

MAX3483/MAX3485/MAX3486/
MAX3488/MAX3490/MAX3491
3.3V-Powered, 10Mbps and Slew-Rate-Limited
True RS-485/RS-422 Transceivers
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VCC) ...............................................................7V
Control Input Voltage (RE, DE) ...................................-0.3V to 7V
Driver Input Voltage (DI) .............................................-0.3V to 7V
Driver Output Voltage (A, B, Y, Z)..........................-7.5V to 12.5V
Receiver Input Voltage (A, B) ................................-7.5V to 12.5V
Receiver Output Voltage (RO)....................-0.3V to (VCC + 0.3V)
Continuous Power Dissipation (TA = +70°C)
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) .....727mW
8-Pin SO (derate 5.88mW/°C above +70°C)..................471mW
14-Pin Plastic DIP (derate 10mW/°C above +70°C) ......800mW
14-Pin SO (derate 8.33mW/°C above +70°C)................667mW
Operating Temperature Ranges
MAX34_ _C_ _.......................................................0°C to +70°C
MAX34_ _E_ _ ....................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+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
(VCC = 3.3V ±0.3V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C)
PARAMETER
Differential Driver Output
Change in Magnitude of Driver
Differential Output Voltage for
Complementary Output States
(Note 1)
SYMBOL
CONDITIONS
RL = 100(RS-422), Figure 4
VOD RL = 54(RS-485), Figure 4
RL = 60(RS-485), VCC = 3.3V, Figure 5
VOD RL = 54or 100, Figure 4
MIN TYP MAX UNITS
2.0
1.5 V
1.5
0.2 V
Driver Common-Mode Output
Voltage
VOC RL = 54or 100, Figure 4
3V
Change in Magnitude of
Common-Mode Output Voltage
(Note 1)
VOC RL = 54or 100, Figure 4
0.2 V
Input High Voltage
Input Low Voltage
Logic Input Current
Input Current (A, B)
Output Leakage (Y, Z)
Output Leakage (Y, Z)
in Shutdown Mode
Receiver Differential
Threshold Voltage
VIH DE, DI, RE
VIL DE, DI, RE
IIN1 DE, DI, RE
IIN2
DE = 0V,
VCC = 0V or 3.6V
VIN = 12V
VIN = -7V
IO
DE = 0V, RE = 0V,
VOUT = 12V
VCC = 0V or 3.6V, MAX3491 VOUT = -7V
IO
DE = 0V, RE = VCC,
VOUT = 12V
VCC = 0V or 3.6V, MAX3491 VOUT = -7V
VTH -7V VCM 12V
2.0
-0.2
V
0.8 V
±2 µA
1.0
mA
-0.8
20
µA
-20
1
µA
-1
0.2 V
Receiver Input Hysteresis
Receiver Output High Voltage
Receiver Output Low Voltage
Three-State (High Impedance)
Output Current at Receiver
VTH
VOH
VOL
IOZR
VCM = 0V
IOUT = -1.5mA, VID = 200mV, Figure 6
IOUT = 2.5mA, VID = 200mV, Figure 6
VCC = 3.6V, 0V VOUT VCC
50 mV
VCC - 0.4
V
0.4 V
±1 µA
Receiver Input Resistance
RIN -7V VCM 12V
12 k
2 Maxim Integrated


Part Number MAX3485
Description 3.3V-Powered / 10Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers
Maker Maxim
Total Page 17 Pages
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