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MAX14840E PDF даташит

Спецификация MAX14840E изготовлена ​​​​«Maxim Integrated Products» и имеет функцию, называемую «RS-485 Half-Duplex Transceivers».

Детали детали

Номер произв MAX14840E
Описание RS-485 Half-Duplex Transceivers
Производители Maxim Integrated Products
логотип Maxim Integrated Products логотип 

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MAX14840E Даташит, Описание, Даташиты
MAX14840E/MAX14841E 40Mbps, +3.3V, RS-485 Half-Duplex Transceivers
General Description
The MAX14840E/MAX14841E are +3.3V ESD-protected
transceivers intended for half-duplex RS-485 communica-
tion up to 40Mbps. These transceivers are optimized for
high speeds over extended cable runs while maximizing
tolerance to noise.
The MAX14840E features symmetrical fail-safe and larg-
er receiver hysteresis, providing improved noise rejection
and improved recovered signals in high-speed and long
cable applications. The MAX14841E has true fail-safe
receiver inputs guaranteeing a logic-high receiver output
when inputs are shorted or open.
The MAX14840E/MAX14841E are available in 8-pin SO
and small, 8-pin (3mm x 3mm) TDFN-EP packages. Both
devices operate over the -40NC to +125NC temperature
range.
Applications
● Motion Controllers
● Fieldbus Networks
● Industrial Control Systems
● Backplane Buses
● HVAC Networks
Ordering Information/Selector Guide appears at end of data
sheet.
Benefits and Features
● High ESD Protection Provides Increases Equipment
Uptime
• ±35kV Human Body Model (HBM) per JEDEC
JS-001-2012
• ±20kV Air Gap Discharge per IEC 61000-4-2
• ±12kV Contact Discharge per IEC 61000-4-2
● Integrated Features Increases Robustness
• Large 170mV Receiver Hysteresis (MAX14840) for
High Receiver Noise Tolerance
• True Fail Safe Receiver Input (MAX14841E) Keeps
Receiver Output Logic-High Upon Shorts and
Open On Receiver Input
• Thermal Self-Protection Shutdown at 160°C
Junction Temperature
• High Industrial -40°C to +125°C Ambient Operating
Temperature Range/-40°C to +150°C Junction
Temperature Range
• Hot Swap Capability Eliminates False Transition
During Power-Up or Hot Insertion
● Low Current Reduces Power Requirements
• 10µA (max) Shutdown Current
• 1.5mA (typ) Supply Current
• 3.3V Supply Voltage
● Available in Industry Standard 8-Pin SO or
Space-Saving 8-Pin TDFN-EP (3mm x 3mm) Packages
Functional Diagram
VCC
MAX14840E
MAX14841E
RO R
RE
SHUTDOWN
DE
DI D
B
A
GND
19-5131; Rev 2; 7/15









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MAX14840E Даташит, Описание, Даташиты
MAX14840E/MAX14841E 40Mbps, +3.3V, RS-485 Half-Duplex Transceivers
Absolute Maximum Ratings
(Voltages referenced to GND.)
VCC ...................................................................... -0.3V to +6.0V
RE, RO ................................................... -0.3V to +(VCC + 0.3V)
DE, DI................................................................... -0.3V to +6.0V
A, B..................................................................... -8.0V to +13.0V
Short-Circuit Duration (RO, A, B) to GND ................ Continuous
Continuous Power Dissipation (TA = +70NC)
8-Pin SO (derate 7.6mW/NC above +70NC) ................ 606mW
8-Pin TDFN (derate 24.4mW/NC above +70NC) ........ 1951mW
Junction-to-Case Thermal Resistance (BJC) (Note 1)
8-Pin SO........................................................................38NC/W
8-Pin TDFN .....................................................................8NC/W
Junction-to-Ambient Thermal Resistance (BJA) (Note 1)
8-Pin SO .....................................................................132NC/W
8-Pin TDFN ...................................................................41NC/W
Operating Temperature Range (Note 2) ......... -40NC to +125NC
Junction Temperature ................................................... +150NC
Storage Temperature Range .......................... -65NC to +150NC
Lead Temperature (soldering, 10s) ................................+300NC
Soldering Temperature (reflow).......................................+260NC
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
Note 2: Operation is specified with junction temperatures up to +150°C.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional opera-
tion 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 = +3.0V to +3.6V, TA = -40NC to +125NC, unless otherwise noted. Typical values are at VCC = +3.3V and TA = +25NC.) (Notes 3, 4)
PARAMETER
POWER SUPPLY
Supply Voltage
Supply Current
Shutdown Supply Current
DRIVER
Differential Driver Output
Change in Magnitude of
Differential Output Voltage
Driver Common-Mode Output
Voltage
Change in Common-Mode
Voltage
Single-Ended Driver Output High
Single-Ended Driver Output Low
Driver Short-Circuit Output
Current
RECEIVER
Input Current (A and B)
Differential Input Capacitance
SYMBOL
VCC
ICC
ISH
VOD
DVOD
VOC
DVO­ C
VOH
VOL
|IOSD|
IA,B
CA,B
CONDITIONS
DE = RE = VCC, or
DE = RE = GND, or
DE = VCC, RE = GND,
DI = VCC or GND, no load
DE = GND and RE = VCC
RL = 54I, Figure 1
RL = 54I, Figure 1 (Note 5)
RL = 54I, Figure 1
RL = 54I, Figure 1 (Note 5)
A/B output, IOUT = -20mA
A/B output, IOUT = 20mA
0V P VOUT P +12V, output low
-7V P VOUT P VCC, output high
DE = GND,
VIN = +12V
VCC = GND or +3.6V
VIN = -7V
Between A and B, DE = GND, f = 2MHz
MIN TYP MAX UNITS
3.0 3.6 V
1.5 4
mA
10
1.5
-0.2 0 +0.2
VCC/2
3
-0.2 0.2
2.2
0.8
250
250
1000
-800
12
FA
V
V
V
V
V
V
mA
FA
pF
www.maximintegrated.com
Maxim Integrated 2









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MAX14840E Даташит, Описание, Даташиты
MAX14840E/MAX14841E 40Mbps, +3.3V, RS-485 Half-Duplex Transceivers
DC Electrical Characteristics (continued)
(VCC = +3.0V to +3.6V, TA = -40NC to +125NC, unless otherwise noted. Typical values are at VCC = +3.3V and TA = +25NC.) (Notes 3, 4)
PARAMETER
Receiver Differential Threshold
Voltage (MAX14840E Only)
Receiver Input Hysteresis
(MAX14840E Only)
Receiver Differential Threshold
Voltage (MAX14841E Only)
Receiver Input Hysteresis
(MAX14841E Only)
LOGIC INTERFACE
Input High Voltage
Input Low Voltage
Input Hysteresis
Input Current
Input Impedance on First
Transition
Output High Voltage
Output Low Voltage
Three-State Output Current at
Receiver
Receiver Output Short-Circuit
Current
PROTECTION
Thermal-Shutdown Threshold
Thermal-Shutdown Hysteresis
ESD Protection: A, B to GND
ESD Protection: All Other Pins
SYMBOL
VTHF
VTHR
CONDITIONS
-7V P VCM P 12V, VOD falling
-7V P VCM P 12V, VOD rising
VCM = 0V
VTH -7V P VCM P 12V
DVTH VCM = 0V
VIH
VIL
VHYS
IIN
DE, DI
RE
DE, DI, RE
DE, DI, RE
DE, DI, RE
DE, RE
VOH
VOL
IOZR
IOSR
RE = GND, IO = -1mA, VA - VB > 200mV
RE = GND, IO = 1mA, VA - VB < -200mV
RE = VCC, 0V P VO P VCC
0V P VRO P VCC
TTS
TTSH
IEC 61000-4-2 Air Gap Discharge
IEC 61000-4-2 Contact Discharge
HBM
HBM
MIN
-200
10
20
TYP
170
MAX
-10
200
UNITS
mV
mV
mV
-200 -105 -10
mV
10 mV
2.0
2.0
5.5 V
0.8 V
50 mV
-1 +1 FA
1 10 kI
VCC -
1.5
V
0.4 V
-1 +1 FA
-95 +95 mA
160 NC
15 NC
Q20
Q12 kV
Q35
Q2 kV
Switching Characteristics
(VCC = +3.0V to +3.6V, TA = -40NC to +125NC, unless otherwise noted. Typical values are at VCC = +3.3V and TA = +25NC.) (Notes 2, 3)
PARAMETER
DRIVER
Propagation Delay
Differential Driver Output Skew
|tDPLH - tDPHL|
SYMBOL
CONDITIONS
tDPLH
tDPHL
tDSKEW
RL = 54I, CL = 50pF, Figures 2 and 3
(Note 6)
RL = 54I, CL = 50pF, Figures 2 and 3
(Notes 6, 9)
MIN TYP MAX UNITS
5
5
12 20
12 20
ns
2 ns
www.maximintegrated.com
Maxim Integrated 3










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