RS-485/RS-422 Transceivers. MAX3485AE Datasheet

MAX3485AE Transceivers. Datasheet pdf. Equivalent

MAX3485AE Datasheet
Recommendation MAX3485AE Datasheet
Part MAX3485AE
Description 20Mbps and Slew-Rate-Limited RS-485/RS-422 Transceivers
Feature MAX3485AE; MAX3483AE/MAX3485AE/ MAX3488AE/MAX3490AE/ MAX3491AE +3.3V-Powered, ±20kV ESD-Protected, 20Mbps and .
Manufacture Maxim Integrated
Datasheet
Download MAX3485AE Datasheet





Maxim Integrated MAX3485AE
MAX3483AE/MAX3485AE/
MAX3488AE/MAX3490AE/
MAX3491AE
+3.3V-Powered, ±20kV ESD-Protected,
20Mbps and Slew-Rate-Limited
RS-485/RS-422 Transceivers
General Description
Devices in the MAX3483AE family (MAX3483AE/
MAX3485AE/MAX3488AE/MAX3490AE/MAX3491AE)
are ±20kV ESD-protected RS-485/422 transceivers,
optimized for extended cable runs in noisy environments.
All devices operate from a single 3.3V supply.
The MAX3483AE and MAX3485AE are half-duplex transceivers.
The MAX3488AE, MAX3490AE, and MAX3491AE are
full-duplex transceivers. The MAX3483AE/85AE have a
1-unit load receiver input impedance, allowing up to 32
transceivers on the bus. The MAX3488AE/90AE/91AE
have a 1/4-unit load receiver input impedance, allowing up
to 128 transceivers on the bus. Each transceiver includes
a fail-safe receiver, ensuring that the receiver output (RO)
is high when inputs are shorted, open, or connected to a
three-state bus.
All devices feature enhanced electrostatic discharge (ESD)
protection. All transmitter outputs and receiver inputs are
protected to ±20kV HBM ESD, ±15kV Air-Gap ESD and
±8kV Contact ESD in accordance to IEC 61000-4-2.
The MAX3483AE, MAX3485AE, MAX3488AE, and
MAX3490AE are available in industry standard 8-pin SO
package, while the MAX3491AE is available in a 14-pin
SO package.
Functional Diagram
Benefits and Features
● Integrated Protection Increases Robustness
• High ESD Protection
±20kV HBM ESD per JEDEC JS-001-2012
±15kV Air Gap per IEC 61000-4-2
±8kV Contact ESD per IEC 61000-4-2
• Short-Circuit Protected Outputs
• True Fail-Safe Receiver Prevents False Transition
on Receiver Input Short or Open Events
• Hot-Swap Capability Eliminates False Transitions
During Power-Up or Hot Insertion
● High-Speed Data Rates up to 20Mbps
● Up to -40°C to +125°C Operating Temperature
● Allows Up to 128 Transceivers on the Bus
Applications
● Industrial-Control Local Area Networks
● Transceivers for EMI-Sensitive Applications
● Telecommuncations
Ordering Information appears at end of data sheet.
19-8506; Rev 1; 9/17



Maxim Integrated MAX3485AE
MAX3483AE/MAX3485AE/
MAX3488AE/MAX3490AE/
MAX3491AE
+3.3V-Powered, ±20kV ESD-Protected,
20Mbps and Slew-Rate-Limited
RS-485/RS-422 Transceivers
Absolute Maximum Ratings
(Voltages referenced to GND.)
VCC ......................................................................-0.3V to +4.0V
RO............................................................. -0.3V to (VCC + 0.3V)
RE, DE, DI.............................................................-0.3V to +4.0V
A, B, Y, Z.............................................................-9.0V to +13.0V
Short-Circuit Duration (RO, A, B, Y, Z) to GND..........Continuous
Operating Temperature Range
MAX3483AE/85AE/88AE/90AE/91AE........... -40°C to +125°C
MAX3488AE/90AE........................................ -40°C to +105°C
Junction Temperature.......................................................+150°C
Storage Temperature Range............................. -65°C to +150°C
Continuous Power Dissipation (TA = +70°C)
8 SO (derate at 7.6mW/°C above +70°C)....................606mW
14 SO (derate at 11.9mW/°C above +70°C)................952mW
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.
Package Thermal Characteristics (Note 1)
Junction-to-Case Thermal Resistance (θJC)
8-pin SO.......................................................................38°C/W
14-pin SO.....................................................................34°C/W
Junction-to-Ambient Thermal Resistance (θJA)
8-pin SO.....................................................................132°C/W
14-pin SO.....................................................................84°C/W
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.
Electrical Characteristics
(VCC = +3.0V to +3.6V, TA = TMIN to TMAX, unless otherwise specified. Typical values are at VCC = +3.3V and TA = +25°C.) (Notes 2, 3)
PARAMETER
POWER SUPPLY
Supply Voltage
Supply Current
Shutdown Supply Current
DRIVER
Differential Driver Output
Change in Magnitude of Differential
Output Voltage
SYMBOL
VCC
ICC
ISHDN
VOD
∆VOD
CONDITIONS
DE = VCC, RE = GND, no load
DE = 0, RE = 0, no load, DI = 0 or VCC
DE = GND, RE = VCC, MAX3483AE/85AE/91AE
VCC = 3V, RL = 100Ω, Figure 1
VCC = 3V, RL = 54Ω, Figure 1
RL = 54Ω or 100Ω, Figure 1 (Note 4)
MIN
3.0
1.2
2.0
1.5
-0.2
TYP MAX UNITS
3.6 V
1.9 4
mA
4.0
10 µA
+0.2
V
V
Driver Common-Mode Output Voltage
Change in Magnitude of Common-
Mode Voltage
VOC
ΔVOC
RL = 54Ω or 100Ω, Figure 1
RL = 54Ω or 100Ω, Figure 1 (Note 4)
VCC/2
3
-0.2 +0.2
V
V
Single-Ended Driver Output High
Single-Ended Driver Output Low
Driver Short-Circuit Output Current
VOH
VOL
IOSD
A or B output, IA or B = -20mA
A or B output, IA or B = 20mA
VOUT = -7V
VOUT = +12V
2.2
-250
V
0.8 V
mA
250 mA
www.maximintegrated.com
Maxim Integrated 2



Maxim Integrated MAX3485AE
MAX3483AE/MAX3485AE/
MAX3488AE/MAX3490AE/
MAX3491AE
+3.3V-Powered, ±20kV ESD-Protected,
20Mbps and Slew-Rate-Limited
RS-485/RS-422 Transceivers
Electrical Characteristics (continued)
(VCC = +3.0V to +3.6V, TA = TMIN to TMAX, unless otherwise specified. Typical values are at VCC = +3.3V and TA = +25°C.) (Notes 2, 3)
PARAMETER
RECEIVER
SYMBOL
Input Current
IA, B
Differential Input Capacitance
Receiver Differential Threshold Voltage
Receiver Input Hysteresis
CA, B
VTH
ΔVTH
Receiver Input Resistance
RIN
LOGIC INTERFACE (DI, DE, RE, RO)
Input Voltage High
VIH
Input Voltage Low
VIL
Input Hysteresis
VHYS
Input Current
IIN
Input Impedance on First Transition
CONDITIONS
DE = GND, VCC = GND VIN = +12V
or +3.6V
VIN = -7V
Between A and B, DE = GND, f = 4MHz
-7V ≤ VCM ≤ +12V
VCM = 0V
MAX3483AE/85AE
-7V ≤ VCM ≤ +12V MAX3488AE/90AE/91AE
DE, DI, RE
DE, DI, RE
DE, DI, RE
DE, DI, RE
DE, RE
MIN
-450
-200
12
48
2.0
1
TYP MAX UNITS
430
-300
12
-105
10
1000
-10
µA
pF
mV
mV
V
0.8 V
50 mV
±2 µA
10
RO Output Voltage High
RO Output Voltage Low
Receiver Three-State Output
Current
RE Pulldown and DE Pullup
Resistance
Receiver Output Short-Circuit
Current
VOHRO
VOLRO
IOZR
RE = GND, IRO = -2mA,
(VA - VB) > 200mV
RE = GND, IRO = 2mA,
(VA - VB) < -200mV
RE = VCC, 0 ≤ VRO ≤ VCC
RIN
IOSR 0 ≤ VRO ≤ VCC
VCC - 1.5
1
V
0.4
±1
±110
V
µA
mA
PROTECTION
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
ESD Protection on A, B, Z, and Y
Pins
ESD Protection, All Other Pins
TSHDN Temperature rising
IEC 61000-4-2 Air Gap Discharge to GND
IEC 61000-4-2 Contact Discharge to GND
Human Body Model to GND
Human Body Model
+160
15
±15
±8
±20
±2
°C
°C
kV
kV
www.maximintegrated.com
Maxim Integrated 3





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