MAX1482CSD+T ,20µA, 1/8-Unit-Load, Slew-Rate-Limited, RS-485 TransceiversELECTRICAL CHARACTERISTICS(V = 5V ±5%, T = T to T , unless otherwise noted. Typical values are at T ..
MAX1482EPD ,20A, 1.8-Unit-Load, Slew-Rate-Limited RS-485 TransceiversApplicationsMAX1482CSD 0°C to +70°C 14 SOLow-Power RS-485/RS-422 Networks MAX1482EPD -40°C to +85°C ..
MAX1482EPD+ ,20µA, 1/8-Unit-Load, Slew-Rate-Limited, RS-485 TransceiversFeaturesThe MAX1482 and MAX1483 are low-power trans-♦ Low 20µA Operating Currentceivers for RS-485 ..
MAX1482ESD ,20A, 1.8-Unit-Load, Slew-Rate-Limited RS-485 TransceiversApplicationsMAX1483CPA 0°C to +70°C 8 Plastic DIPIndustrial-Control Local Area NetworksMAX1483CSA 0 ..
MAX1482ESD+ ,20µA, 1/8-Unit-Load, Slew-Rate-Limited, RS-485 TransceiversApplicationsrent. Additionally, they have a low-current shutdownmode that consumes only 0.1µA. Both ..
MAX1482ESD+T ,20µA, 1/8-Unit-Load, Slew-Rate-Limited, RS-485 TransceiversGeneral Description ________
MAX406BCSA ,1.2microA max, single, single-supply op amp.Applications
Battery-Powered Systems
Medical Instruments
Electrometer Amplifiers
Intrinsicall ..
MAX406BCSA ,1.2microA max, single, single-supply op amp.General Description
The MAX406/MAX407/MAX409/MAX417-MAX419 are
single, dual, and quad low-volta ..
MAX406BEPA ,1.2microA max, single, single-supply op amp.General Description
The MAX406/MAX407/MAX409/MAX417-MAX419 are
single, dual, and quad low-volta ..
MAX406BEPA ,1.2microA max, single, single-supply op amp.ELECTRICAL CHARACTERISTICS (continued)
(V+ = 2.5V, V- = -2.5V, TA = +25°C, unless otherwise note ..
MAX406BESA ,1.2microA max, single, single-supply op amp.ELECTRICAL CHARACTERISTICS
(V+ = 2.5V, V- = -2.5V, TA = +25°C, unless otherwise noted.)
PARAMET ..
MAX4070AUA+ ,Bidirectional, High-Side, Current-Sense Amplifiers with ReferenceFeaturesThe MAX4069–MAX4072 low-cost, bidirectional, high-♦ Bidirectional, Compact, Current-Sense S ..
MAX1482CPD+-MAX1482CSD+-MAX1482CSD+T-MAX1482EPD+-MAX1482ESD+-MAX1482ESD+T-MAX1482ESD-T-MAX1483CPA+-MAX1483CSA+-MAX1483CSA+T-MAX1483CUA+-MAX1483EPA+-MAX1483ESA+-MAX1483ESA+T-MAX1483EUA+
20µA, 1/8-Unit-Load, Slew-Rate-Limited, RS-485 Transceivers
_______________General DescriptionThe MAX1482 and MAX1483 are low-power trans-
ceivers for RS-485 and RS-422 communication. Both
feature slew-rate-limited drivers that minimize EMI and
reduce reflections caused by improperly terminated
cables. Data rates are guaranteed up to 250kbps.
The MAX1482/MAX1483 draw only 20µA of supply cur-
rent. Additionally, they have a low-current shutdown
mode that consumes only 0.1µA. Both parts operate
from a single +5V supply.
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 the input
is open circuit.
The MAX1482 is full duplex and the MAX1483 is half
duplex. Both parts have a 1⁄8-unit-load input impedance
that guarantees up to 256 transceivers on the bus.
________________________ApplicationsLow-Power RS-485/RS-422 Networks
Transceivers for EMI-Sensitive Applications
Industrial-Control Local Area Networks
Large 256-Node LANs
____________________________FeaturesLow 20µA Operating CurrentSlew-Rate Limited for Reduced EMI and
Reduced Reflections0.1µA Low-Current Shutdown ModeDesigned for RS-485 and RS-422 ApplicationsOperate from a Single +5V Supply-7V to +12V Common-Mode Input Voltage RangeAllows up to 256 Transceivers on the Bus—
Guaranteed (1⁄8-unit load)Current Limiting and Thermal Shutdown for
Driver Overload Protection
MAX1482/MAX1483
20µA, 1⁄8-Unit-Load, Slew-Rate-Limited
RS-485 TransceiversTOP VIEW
VCC
GND DI
DIP/SOVCC
GND RE
μMAX
MAX1483
_________________Pin ConfigurationsMAX1483
NOTE: PIN LABELS Y AND Z ON TIMING, TEST, AND WAVEFORM
DIAGRAMS REFER TO PINS A AND B WHEN DE IS HIGH.
TYPICAL OPERATING CIRCUIT SHOWN WITH DIP/SO PACKAGE.
VCC
+5V
GND DIRRtAB
_________Typical Operating Circuits19-0367; Rev 1; 5/06
MAX1482 appears at end of data sheet.MAX1482 appears at end of data sheet.
PARTTEMP RANGEPIN-PACKAGEPKG
CODE
MAX1482CPD0°C to +70°C14 PDIPP14-3
MAX1482CSD0°C to +70°C14 SOS14-4
MAX1482EPD-40°C to +85°C14 PDIPP14-3
MAX1482ESD-40°C to +85°C14 SOS14-4
MAX1483CPA0°C to +70°C8 PDIPP8-1
MAX1483CSA0°C to +70°C8 SOS8-5
MAX1483CUA0°C to +70°C8 µMAX®U8-1
MAX1483EPA-40°C to +85°C8 PDIPP8-1
MAX1483ESA-40°C to +85°C8 SOS8-5
Ordering InformationµMAX is a registered trademark of Maxim Integrated products, Inc.
MAX1482/MAX1483
20µA, 1⁄8-Unit-Load, Slew-Rate-Limited
RS-485 Transceivers
ABSOLUTE MAXIMUM RATINGSStresses 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.
Supply Voltage (VCC)...............................................................7V
Control Input Voltages (RE, DE).................-0.5V to (VCC+ 0.5V)
Driver Input Voltage (DI).............................-0.5V to (VCC+ 0.5V)
Driver Output Voltages..........................................-7.5V to 12.5V
Receiver Input Voltages (A, B)..............................-7.5V to 12.5V
Receiver Output Voltage (RO)....................-0.5V to (VCC+ 0.5V)
Continuous Power Dissipation (TA= +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
8-Pin µMAX (derate 4.10mW/°C above +70°C).............330mW
Operating Temperature Ranges
MAX148_C_ _.......................................................0°C to +70°C
MAX148_E_ _.....................................................-40°C to +85°C
Storage Temperature Range.............................-65°C to +160°C
Lead Temperature (soldering, 10sec).............................+300°C
DC ELECTRICAL CHARACTERISTICS(VCC= 5V ±5%, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
VIN= -7V
VIN= 12V
VIN= -7V
VIN= 12V
Input Current
(A, B)IIN2
VTH96-7V ≤VCM≤12V
R = 27Ω(RS-485), Figure 1
0.4V ≤VO≤2.4V
R = 50Ω(RS-422), Figure 1
IO = 4mA, VID= -200mV= -4mA, VID= 200mV
VCM= 0V
-7V ≤VCM≤12V
DE, DI, –R—E–
DE, DI, –R—E–
MAX1483,
DE = 0V, VCC= 0V or 5.25V
R = 27Ωor 50Ω, Figure 1
R = 27Ωor 50Ω, Figure 1
R = 27Ωor 50Ω, Figure 1
MAX1482,
DE = 0V, VCC= 0V or 5.25V
CONDITIONS±1IOZRThree-State (high impedance)
Output Current at Receiver
0.4VOLReceiver Output Low Voltage
3.5VOHReceiver Output High Voltage75∆VTHReceiver Input Hysteresis-0.20.2Receiver Differential Threshold
Voltage
200µA-100
1.55VOD2Differential Driver Output
(with load)V255VOD1Differential Driver Output (no load)±2IIN1Logic Input Current0.8VILLogic Input Low Voltage0.2∆VOD
Change in Magnitude of Driver
Common-Mode Output Voltage
for Complementary Output States0.2∆VOD
Change in Magnitude of Driver
Differential Output Voltage for
Complementary Output States3VOCDriver Common-Mode Output
Voltage
UNITSMINTYPMAXSYMBOLPARAMETERRINReceiver Input Resistance
Note 1:All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to device
ground unless otherwise specified.
DE, DI, –R—E–V2.0VIHLogic Input High Voltage
MAX1482 only,
-7V < VY andVZ< 12VµA±50IOZDThree-State (high impedance)
Output Current at Driver
MAX1482/MAX1483
20µA, 1⁄8-Unit-Load, Slew-Rate-Limited
RS-485 Transceivers
DC ELECTRICAL CHARACTERISTICS (continued)(VCC= 5V ±5%, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
SWITCHING CHARACTERISTICS(VCC= 5V ±5%, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
MAX1482,= 0V or VCC
0V ≤VO≤VCC
MAX1483,= 0V or VCC
DE = 0V, RE= VCC
DI = high or low, -7V ≤VO≤12V (Note 2)
CONDITIONS853545±7±95IOSRReceiver Short-Circuit Current35
ICCNo-Load Supply Current0.110ISHDNSupply Current in Shutdown35250IOSDDriver Short-Circuit Current
UNITSMINTYPMAXSYMBOLPARAMETERDE = VCC
DE = 0V
DE = VCC
DE = 0V
Figures 4 and 6, CL= 15pF, S2 closed
Figures 4 and 6, CL= 15pF, S1 closed
Figures 4 and 6, CL= 100pF, S1 closed
Figures 4 and 6, CL= 100pF, S2 closed
PARAMETERSYMBOLMINTYPMAXUNITSDriver Enable to Output HightZH0.22
Driver Output Skew to Output
tR, tF0.252µs
Driver Enable to Output LowtZL0.12
Driver Disable Time from LowtLZ0.33.0µs
Driver Disable Time from HightHZ0.33.0µs
Driver Input to OutputtPLH2
tSKEW800
CONDITIONSFigures 3 and 5, RDIFF= 54Ω,
CL1= CL2= 100pF
Figures 3 and 5, RDIFF= 54Ω, CL1= CL2= 100pF
Figures 3 and 5, RDIFF= 54Ω, CL1= CL2= 100pF
Driver Rise or Fall Time
tPHL2
Receiver Input to OutputtPLH,tPHLFigures 3 and 7, RDIFF= 54Ω, CL1= CL2= 100pF0.252.25µstPLH- tPHL|Differential
Receiver SkewtSKDFigures 3 and 7, RDIFF= 54Ω, CL1= CL2= 100pF160ns
Receiver Enable to Output LowtZLFigures 2 and 8,CRL= 15pF, S1 closed90ns
Receiver Enable to Output HightZHFigures 2 and 8,CRL= 15pF, S2 closed90ns
Receiver Disable Time from LowtLZFigures 2 and 8,CRL= 15pF, S1 closed90ns
Receiver Disable Time from HightHZFigures 2 and 8,CRL= 15pF, S2 closed90ns
Maximum Data RatefMAX250kbps
Time to ShutdowntSHDN(Note 3)50200600ns
Driver Enable from Shutdown to
Output HightZH(SHDN)Figures 4 and 6, CL= 100pF, S2 closed2µs
Driver Enable from Shutdown to
Output LowtZL(SHDN)Figures 4 and 6, CL= 100pF, S1 closed2µs
Receiver Enable from Shutdown
to Output HightZH(SHDN)Figures 2 and 8, CL= 15pF, S2 closed,
A - B = 2V3
Receiver Enable from Shutdown
to Output LowtZL(SHDN)Figures 2 and 8, CL= 15pF, S1 closed,
B - A = 2V3
Note 2:Applies to peak current. See Typical Operating Characteristics.
Note 3:The MAX1482/MAX1483 are put into shutdown by bringing–R—E–high and DE low. If the inputs are in this state for less
than 50ns, the parts are guaranteed not to enter shutdown. If the inputs are in this state for at least 600ns, the parts are
guaranteed to have entered shutdown. See Low-Power Shutdown Modesection.
MAX1482/MAX1483
20µA, 1⁄8-Unit-Load, Slew-Rate-Limited
RS-485 Transceivers
RECEIVER PROPAGATION DELAY
vs. TEMPERATUREMAX1482-01
TEMPERATURE (°C)
RECEIVER PROPAGATION DELAY (ns)
DRIVER PROPAGATION DELAY
vs. TEMPERATURE
MAX1482-02
TEMPERATURE (°C)
DRIVER PROPAGATION DELAY (ns)
DRIVER OUTPUT CURRENT vs.
DIFFERENTIAL OUTPUT VOLTAGE
MAX1482-03
OUTPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
DRIVER DIFFERENTIAL OUTPUT VOLTAGE
vs. TEMPERATUREMAX1482-04
TEMPERATURE (°C)
DIFFERENTIAL OUTPUT VOLTAGE (V)
R = 54Ω
MAX1482
SUPPLY CURRENT
vs. TEMPERATURE
MAX1482-07
TEMPERATURE (°C)
SUPPLY CURRENT (
DE = VCC
DE = 0V
OUTPUT CURRENT vs.
DRIVER OUTPUT LOW VOLTAGE
MAX1482-05
OUTPUT LOW VOLTAGE (V)
OUTPUT CURRENT (mA)
OUTPUT CURRENT vs.
DRIVER OUTPUT HIGH VOLTAGE
MAX1482-06
OUTPUT LOW VOLTAGE (V)
OUTPUT CURRENT (mA)
MAX1483
SUPPLY CURRENT
vs. TEMPERATURE
MAX1482-08
TEMPERATURE (°C)
SUPPLY CURRENT (
DE = VCC
DE = GND
__________________________________________Typical Operating Characteristics(TA = +25°C, unless otherwise noted.)
MAX1482/MAX1483
20µA, 1⁄8-Unit-Load, Slew-Rate-Limited
RS-485 Transceivers
PIN1, 8, 13
MAX1482
DIP/SO
FUNCTION1
Receiver Output. With the receiver output enabled (RElow), RO is high if
A > B by 200mV or when A and B are not connected, and RO is low if A < B
by 200mV.
DIP/SO2
Receiver Output Enable. When REis low, RO is enabled. When REis high, RO
is high impedance. If REis high and DE is low, the MAX1482/MAX1483 enter
a low-power (0.1µA) shutdown state.3
Driver Output Enable. The driver outputs, A and B, (Y and Z for the MAX1482)
are enabled by bringing DE high. When DE is low, the driver outputs are high
impedance, and the devices can function as line receivers if REis low. If REis
high and DE is low, the parts will enter a low-power (0.1µA) shutdown state. If
the driver outputs are enabled, the devices function as line drivers.—Inverting Driver Output—Noninverting Driver Output
6, 75Ground4Driver Input. With DE high, a low on DI forces output Y low and output Z high,
and a high on DI forces output Y high and output Z low.8Positive Supply: 4.75V to 5.25V—Inverting Receiver Input7Inverting Receiver Input and Inverting Driver Output—Noninverting Receiver Input6Noninverting Receiver Input and Noninverting Driver Output
MAX1483
NAMEGND
VCC
N.C.No Connect—not internally connected
µMAX
______________________________________________________________Pin Description
MAX1482/MAX1483
20µA, 1⁄8-Unit-Load, Slew-Rate-Limited
RS-485 TransceiversFigure 1. Driver DC Test Load
Figure 3. Driver/Receiver Timing Test CircuitFigure 4. Driver Timing Test Load
Figure 2. Receiver Timing Test Load
VOD
VOC
CL1
CL2
RDIFF
VIDOUTPUT
UNDER TEST
500ΩS1
VCC
RECEIVER
OUTPUT
TEST POINT
VCC
CRL
15pF
_________________________________________________________________Test Circuits
MAX1482/MAX1483
20µA, 1⁄8-Unit-Load, Slew-Rate-Limited
RS-485 TransceiversFigure 5. Driver Propagation Delays
Figure 8. Receiver Enable and Disable TimesFigure 7. Receiver Propagation Delays
Figure 6. Driver Enable and Disable Times
-VO
1.5V
tPLH
1/2 VO
10%
90%90%
tPHL
1.5V
1/2 VO
10%
VDIFF = V (Y) - V (Z)
VDIFF
tSKEW = | tPLH - tPHL |
VOH
VOL
VID
-VID
1.5V
1.5VOUTPUT
INPUT0V
A-B
tPLHtPHLOUTPUT NORMALLY LOW
OUTPUT NORMALLY HIGH
VCC
1.5V1.5V
VOL + 0.5V
VOH - 0.5V1.5V
1.5V
tZL(SHDN), tZLtLZ
tZH(SHDN), tZHtHZ
OUTPUT NORMALLY LOW
OUTPUT NORMALLY HIGH
Y, Z
VOL
Y, Z
1.5V1.5V
VOL + 0.5V
VOH - 0.5V2.3V
2.3V
tZL(SHDN), tZLtLZ
tZH(SHDN), tZHtHZ
_______________________________________________________Switching Waveforms
