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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX14780E Datasheet

RS-485/RS-422 Transceiver

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MAX14780E
+5.0V, ±30kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceiver
General Description
The MAX14780E is a +5V, ±30kV HBM ESD half duplex
RS-485/422 transceiver.
The MAX14780E features reduced slew-rate drivers that
minimize EMI and reduce reflections caused by improp-
erly terminated cables, allowing error-free data transmis-
sion up to 500kbps.
The MAX14780E is available in an 8-pin SO and PDIP
packages operating over a temperature range from
-40°C to +85°C.
Utility Meters
Lighting Systems
Industrial Control
Telecom
Security Systems
Instrumentation
Applications
Benefits and Features
Integrated Protection Increases Robustness
S ±30kV HBM ESD per JEDEC JS-001-2012
S ±12kV Contact ESD per IEC 61000-4-2
S ±15kV Air Gap ESD per IEC 61000-4-2
S True Fail-Safe Receiver Prevents False
Transitions on Receiver Input Short or Open
S Hot Swap Eliminates False Transitions During
Power-Up or Hot Insertion
S Short-Circuit Protected Outputs Low Current
Reduces Power Consumption
Low Current Reduces Power Consumption
S 10µA Shutdown Current
S 1.2mA of Supply Current When Unloaded
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX14780EESA+
-40NC to +85NC
8 SO
MAX14780EEPA+
-40NC to +85NC
8 PDIP
+Denotes a lead(Pb)-free/RoHS-compliant package.
RO 1 + R
RE 2
DE 3
DI 4 D
Typical Operating Circuit
0.1µF
8 VCC
7B
Rt
6
5A
GND
MAX14780E
B
Rt
A
TYPICAL HALF-DUPLEX OPERATING CIRCUIT
DE
D DI
R
RE
RO
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-5652; Rev 3; 1/15


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX14780E Datasheet

RS-485/RS-422 Transceiver

No Preview Available !

MAX14780E
+5.0V, ±30kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceiver
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND.)
Supply Voltage (VCC)............................................................ +6V
Control Input Voltage (RE, DE)................................-0.3V to +6V
Driver Input Voltage (DI)..........................................-0.3V to +6V
Driver Output Voltage (A, B).....................................-8V to +13V
Receiver Input Voltage (A, B)...................................-8V to +13V
Receiver Output Voltage (RO).................. -0.3V to (VCC + 0.3V)
Driver Output Current..................................................... ±250mA
Continuous Power Dissipation (TA = +70°C)
SO (derate 5.9mW/°C above +70°C)...........................471mW
PDIP (derate 9.1mW/°C above +70°C) .....................727.3mW
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
(VCC = +5.0V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V and TA = +25NC.) (Note 1)
PARAMETER
DRIVER
VCC Supply-Voltage Range
Differential Driver Output
Change in Magnitude of
Differential Output Voltage
SYMBOL
CONDITIONS
VCC
VOD
DVOD
RL = 100I (RS-422), Figure 1
RL = 54I (RS-485), Figure 1
No load
RL = 100I or 54I, Figure 1 (Note 2)
MIN TYP MAX UNITS
4.5 5.5 V
3 VCC
2
VCC
V
VCC
0.2 V
Driver Common-Mode Output
Voltage
VOC RL = 100I or 54I, Figure 1
VCC/2
3
V
Change in Magnitude of
Common-Mode Voltage
Input-High Voltage
Input-Low Voltage
Input Hysteresis
Input Current
Input Impedance First Transition
at Power-Up
DVOC
VIH
VIL
VHYS
IIN1
RPWUP
RL = 100I or 54I, Figure 1 (Note 2)
DE, DI, RE
DE, DI, RE
DE, DI, RE
DE, DI, RE
DE, RE = RE = 2V
3
100
3.65
0.2
0.8
Q1
8.8
V
V
V
mV
FA
kI
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
Rft
IOSD
IOSDF
TTS
TTSH
IA, B
DE = RE = 2V
0 P VOUT P +12V (Note 3)
-7V P VOUT P VCC (Note 3)
(VCC - 1V) P VOUT P +12V (Note 3)
-7V P VOUT P +1V (Note 3)
VDE = 0V,
VCC = 0V or VCC
VIN = +12V
VIN = -7V
VTH
DVTH
-7V P VCM P +12V
VA + VB = 0V
7
40
-250
20
175
15
-100
60
250
-40
-20
125
k
mA
mA
NC
NC
FA
-200
-125
15
-50
mV
mV
2   Maxim Integrated


Part Number MAX14780E
Description RS-485/RS-422 Transceiver
Maker Maxim Integrated Products
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