MAX13448EESD+T Fast Delivery |IC PHOENIX CO.,LIMITED

MAX13448EESD+T ,±80V Fault-Protected, Full-Duplex RS-485 TransceiverApplicationsIndustrial Control SystemsHVAC Control systemsPin Configuration appears at end of data ..
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MAX3996CGP ,3.0V to 5.5V / 2.5Gbps VCSEL and Laser DriverApplicationsFibre Channel Optical Transmitters0.01µ FVCCSHDNDRVTX_DISABLEVCSEL Transmitters0.01µ FG ..
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MAX13448EESD+T
±80V Fault-Protected, Full-Duplex RS-485 Transceiver
General Description
The MAX13448E full-duplex RS-485 transceiver fea-
tures inputs and outputs fault protected up to ±80V
(with respect to ground). The device operates from a
+3.0V to +5.5V supply and features true fail-safe cir-
cuitry, guaranteeing a logic-high receiver output when
the receiver inputs are open or shorted. This enables all
receiver outputs on a terminated bus to output logic-
high when all transmitters are disabled.
The MAX13448E features a slew-rate limited driver that
minimizes EMI and reduces reflections caused by
improperly terminated cables, allowing error-free data
transmission at data rates up to 500kbps with a +5V
supply, and 250kbps with a +3.3V supply.
The MAX13448E includes a hot-swap capability to elimi-
nate false transitions on the bus during power-up or hot
insertion. The driver and receiver feature active-high and
active-low enables, respectively, that can be connected
together externally to serve as a direction control.
The MAX13448E features an 1/8-unit load receiver input
impedance, allowing up to 256 transceivers on the bus.
All driver outputs are protected to ±8kV ESD using the
Human Body Model. The MAX13448E is available in a
14-pin SO package and operates over the extended
-40°C to +85°C temperature range.
Applications
Industrial Control Systems
HVAC Control systems
Utility Meters
Motor Driver Control Systems
Features±80V Fault Protection on the RS-485 I/O PortsTrue Fail-Safe ReceiverHot-Swap Input Structure on DEESD Protection on the RS-485 I/O Ports
±8kV Human Body Model Slew-Rate Limiting Facilitates Error-Free Data
Transmission1/8-Unit Load Allows Up to 256 Transceivers on
the Bus-7V to +12V Common-Mode Input Voltage Range+3.0V to +5.5V Operating Supply VoltageAvailable in 14-Pin SO Package
MAX13448E
±80V Fault-Protected Full-Duplex
RS-485 Transceiver
Ordering Information
19-4098; Rev 0; 5/08
PARTTEMP RANGEPIN-PACKAGE
MAX13448EESD+-40°C to +85°C14 SO
Pin Configuration appears at end of data sheet.
+Denotes a lead-free package.
6, 73DRE
N.C.
GNDGND
VCC
1μF141VCCN.C.2N.C.RO3ARE4BDE5ZDI6YGND7N.C.GND
1, 8,
VCCMAX13448E
Functional Diagram
MAX13448E
±80V Fault-Protected Full-Duplex
RS-485 Transceiver
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VCC= +3.0 to +5.5V, TA= TMINto TMAX, unless otherwise noted. Typical values are at VCC= +3.3V and TA= +25°C.) (Notes 2, 3)
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.
(All voltages reference to GND.)
Supply Voltage (VCC).............................................................+6V
Control Input Voltage (RE, DE)...................-0.3V to (VCC+ 0.3V)
Driver Input Voltage (DI).............................-0.3V to (VCC+ 0.3V)
Receiver Input Voltage (A, B (Note 1))................................±80V
Driver Output Voltage (Y, Z (Note 1))..................................±80V
Receiver Output Voltage (RO)....................-0.3V to (VCC+ 0.3V)
Short-Circuit Duration (RO, A, B)...............................Continuous
Continuous Power Dissipation (TA= +70°C)
14-Pin SO (derate 8.3mW/°C above +70°C)................667mW
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
PARAMETERSYMBOLCONDITIONMINTYPMAXUNITS
VCC Supply Voltage RangeVCC3.05.5Vo l oad , D E , D I, RE = 0V or V C C , V C C = 3.3V 15Supply CurrentIQNo load, DE, DI, RE = 0V or VCC, VCC = 5V15mA
DE = GND, RE = VCC, VCC = 3.3V100Supply Current in Shutdown
ModeISHDNDE = GND, RE = VCC, VCC = 5V100µA
DE = GND, RE = GND, short to +60V15Supply Current with Output
Shorted to ±60VISHRTDE = GND, RE = GND, short to -60V15mA
DRIVER
RL = 100Ω, Figure 12VCCDifferential Driver OutputVODRL = 54Ω, Figure 11.5VCCV
Change in Magnitude of
Differential Output VoltageΔVODRL = 100Ω or 54Ω, Figure 1 (Note 4)-0.20.2V
Driver Common-Mode Output
VoltageVOCRL = 100Ω or 54Ω, Figure 1VCC/23V
Change in Magnitude of
Common-Mode VoltageΔVOCRL = 100Ω or 54Ω, Figure 1 (Note 4)-0.2+0.2V
DI = low, 0V ≤ VY or VZ ≤ +12V+250Driver Short-Circuit Output
CurrentIOSDDI = high, -7V ≤ VY or VZ ≤ VCC (Note 5)-250mA
DI = low, (VCC - 1V) ≤ VY or VZ ≤ +12V+10Driver Short-Circuit Foldback
Output CurrentIOSDFDI = high, -7V ≤ VY or VZ ≤ +1V-10mA
VY or VZ ≥ + 22V, RL = 100Ω+6Driver-Limit Short-Circuit
Foldback Output CurrentIOSDLVY or VZ ≤ -13V, RL = 100Ω-6mA
Driver Input High VoltageVDIH 2V
Driver Input Low VoltageVDIL 0.8V
Driver Input CurrentIDIN -1+1µA
Note 1:If the RS-485 transmission lines are unterminated and a short to a voltage VSHToccurs at a remote point on the line, an active
local driver (with DI switching) may see higher voltage than VSHTdue to inductive kickback at the driver. Terminating the line
with a resistor equal to its characteristic impedance minimizes this kickback effect.
MAX13448E
±80V Fault-Protected Full-Duplex
RS-485 Transceiver
ELECTRICAL CHARACTERISTICS (continued)
(VCC= +3.0 to +5.5V, TA= TMINto TMAX, unless otherwise noted. Typical values are at VCC= +3.3V and TA= +25°C.) (Notes 2, 3)
PARAMETERSYMBOLCONDITIONMINTYPMAXUNITS
RECEIVER
VA, VB = +12VVCC = GND or
VCC = +3.0V to +5.5V+125µA
VA, VB = -7V-100µAInput CurrentIA, B
VA, VB = ±80V-6+6mA
Receiver Differential Threshold
VoltageVTH-7V ≤ VCM ≤ +12V-200-50mV
Receiver Input HysteresisΔVTH25mV
Output High VoltageVOHIOH = -1.6mAVCC -
0.6V
Output Low VoltageVOLIOL = 1mA0.4V
Three-State Output Current at
ReceiverIOZR0 ≤ VA, VB ≤ VCC-1+1µA
Receiver Output Short-Circuit
CurrentIOSR0 ≤ VRO ≤ VCC-95+95mA
ESD PROTECTION
All PinsHuman Body Model±2kV
ESD Protection Level
(A and B, Y and Z)Human Body Model±8kV
CONTROL
Control Input High VoltageVCIHDE, RE2V
Control Input Low VoltageVCILDE, RE0.8V
Input Current Latch During First
Rising EdgeIINDE, RE80µA
PROTECTION SPECIFICATIONS
Overvoltage ProtectionA, B, Y, Z-80+80V
PARAMETERSYMBOLCONDITIONMINTYPMAXUNITS
DRIVER
Driver Differential Propagation
Delay
tDPLH,
tDPHLRL = 54Ω, CL = 50pF, Figures 2 and 37001500ns
Driver Differential Output
Transition TimetLH, tHLRL = 54Ω, CL = 50pF, Figures 2 and 32501200ns
Differential Driver Output SkewtDSKEWRL = 54Ω, CL = 50pF, tDSKEW = [tDPLH -
tDPHL], Figures 2 and 3150200ns
Maximum Data RatefMAX250kbpsr i ver E nab l e Ti m e to Outp ut H i g htDZHRL = 500Ω, CL = 50pF, Figure 42000ns
SWITCHING CHARACTERISTICS (VCC= +3.3V ±10%)
(TA= TMINto TMAX, unless otherwise noted. Typical values are at VCC= +3.3V and TA= +25°C.)
MAX13448E
±80V Fault-Protected Full-Duplex
RS-485 Transceiver
SWITCHING CHARACTERISTICS (VCC= +3.3V ±10%) (continued)
(TA= TMINto TMAX, unless otherwise noted. Typical values are at VCC= +3.3V and TA= +25°C.)
SWITCHING CHARACTERISTICS (VCC= +5V ±10%)
(TA= TMINto TMAX, unless otherwise noted. Typical values are at VCC= +5V and TA= +25°C.)
PARAMETERSYMBOLCONDITIONMINTYPMAXUNITS
Driver Disable Time from
Output HightDHZRL = 500Ω, CL = 50pF, Figure 41000ns
Driver Enable Time from
Shutdown to Output HightDZH(SHDN)RL = 500Ω, CL = 50pF, Figure 48µsr i ver E nab l e Ti m e to Outp ut Low tDZLRL = 500Ω, CL = 50pF, Figure 51500ns
Driver Disable Time from
Output LowtDLZRL = 500Ω, CL = 50pF, Figure 52000ns
Driver Enable Time from
Shutdown to Output LowtDZL(SHDN)RL = 500Ω, CL = 50pF, Figure 58µs
Driver Time to ShutdowntSHDNRL = 500Ω, CL = 50pF12µs
RECEIVER
Receiver Propagation DelaytRPLH,
tRPHL
CL = 20pF, VID = 2V, VCM = 0V,
Figure 62000ns
Receiver Output SkewtRSKEWCL = 20pF, tRSKEW = [tRPLH - tRPHL],
Figure 6200ns
Receiver Enable Time to
Output HightRZHRL = 1kΩ, CL = 20pF, Figure 71000ns
Receiver Disable Time from
Output HightRHZRL = 1kΩ, CL = 20pF, Figure 7150ns
Receiver Wake Time from
ShutdowntRWAKERL = 1kΩ, CL = 20pF, Figure 75µs
Receiver Enable Time to
Output LowtRZLRL = 1kΩ, CL = 20pF, Figure 71000ns
Receiver Disable Time from
Output LowtRLZRL = 1kΩ, CL = 20pF, Figure 7150ns
Receiver Time to ShutdowntSHDNRL = 500Ω, CL = 50pF200ns
PARAMETERSYMBOLCONDITIONMINTYPMAXUNITS
DRIVER
Driver Differential Propagation
Delay
tDPLH,
tDPHLRL = 54Ω, CL = 50pF, Figure 3800ns
Driver Differential Output
Transition TimetLH, tHLRL = 54Ω, CL = 50pF, Figure 31001200ns
Differential Driver Output SkewtDSKEWRL = 54Ω, CL = 50pF, tDSKEW = [tDPLH -
tDPHL], Figure 3200ns
MAX13448E
±80V Fault-Protected Full-Duplex
RS-485 Transceiver
SWITCHING CHARACTERISTICS (VCC= +5V ±10%) (continued)
(TA= TMINto TMAX, unless otherwise noted. Typical values are at VCC= +5V and TA= +25°C.)
PARAMETERSYMBOLCONDITIONMINTYPMAXUNITSr i ver E nab l e Ti m e to Outp ut H i g htDZHRL = 500Ω, CL = 50pF, Figure 41500ns
Driver Disable Time from
Output HightDHZRL = 500Ω, CL = 50pF, Figure 41000ns
Driver Enable Time from
Shutdown to Output HightDZH(SHDN)RL = 500Ω, CL = 50pF, Figure 48µs
Driver Enable Time to Output LowtDZLRL = 500Ω, CL = 50pF, Figure 51000ns
Driver Disable Time from
Output LowtDLZRL = 500Ω, CL = 50pF, Figure 52µs
Driver Enable Time from
Shutdown to Output LowtDZL(SHDN)RL = 500Ω, CL = 50pF, Figure 58µs
Driver Time to ShutdowntSHDNRL = 500Ω, CL = 50pF12µs
RECEIVER
Receiver Propagation DelaytRPLH,
tRPHL
CL = 20pF, VID = 2V, VCM = 0V,
Figure 62000ns
Receiver Output SkewtRSKEWCL = 20pF, tRSKEW = [tRPLH - tRPHL],
Figure 6200ns
Receiver Enable Time to
Output HightRZHRL = 1kΩ, CL = 20pF, Figure 71000ns
Receiver Disable Time from
Output HightRHZRL = 1kΩ, CL = 20pF, Figure 7150ns
Receiver Wake Time from
ShutdowntRWAKERL = 1kΩ, CL = 20pF, Figure 78µs
Receiver Enable Time to
Output LowtRZLRL = 1kΩ, CL = 20pF, Figure 71000ns
Receiver Disable Time from
Output LowtRLZRL = 1kΩ, CL = 20pF, Figure 7150ns
Receiver Time to ShutdowntSHDNRL = 500Ω, CL = 50pF150ns
Note 2:Parameters are 100% production tested at TA= +25°C, unless otherwise noted. Limits over temperature are guaranteed by
design.
Note 3:All currents into the device are positive. All currents out of the device are negative. All voltages are referenced to device
ground, unless otherwise noted.
Note 4:ΔVODand ΔVOCare the changes in VODand VOC, respectively, when the DI input changes state.
Note 5:The short-circuit output current applies to peak current just prior to foldback current limiting. The short-circuit foldback output
current applies during current limiting to allow a recover from bus contention.
MAX13448E
±80V Fault-Protected Full-Duplex
RS-485 Transceiver
Typical Operating Characteristics
(VCC = +3.3V, TA = +25°C, unless otherwise noted.)
SUPPLY CURRENT vs. TEMPERATURE
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
MAX13448E toc01
DE = RE = LOW
A - B = HIGH
DI = FLOATING
RECEIVER OUTPUT SOURCE CURRENT
vs. OUTPUT HIGH VOLTAGE
OUTPUT SOURCE CURRENT (mA)
OUTPUT HIGH VOLTAGE (V)
MAX13448E toc02
DE = RE = LOW
A - B = HIGH
+25°C
+85°C
-40°C
RECEIVER OUTPUT SINK CURRENT
vs. OUTPUT LOW VOLTAGE
OUTPUT SINK CURRENT (mA)
OUTPUT LOW VOLTAGE (V)
MAX13448E toc03
DE = RE = LOW
B - A = HIGH
+85°C
+25°C
-40°C
RECEIVER OUTPUT HIGH VOLTAGE
vs. TEMPERATURE
TEMPERATURE (°C)
OUTPUT HIGH VOLTAGE (V)
MAX13448E toc04
DE = RE = LOW
A - B = HIGH
ISOURCE = 1mA
RECEIVER OUTPUT LOW VOLTAGE
vs. TEMPERATURE
TEMPERATURE (°C)
OUTPUT LOW VOLTAGE (V)
MAX13448E toc05
DE = RE = LOW
B - A = HIGH
ISINK = 1mA
DRIVER DIFFERENTIAL OUTPUT VOLTAGE
vs. DIFFERENTIAL OUTPUT CURRENT
DIFFERENTIAL OUTPUT VOLTAGE (V)
MAX13448E toc0620406080100
DE = RE = HIGH
DI = HIGH
DRIVER DIFFERENTIAL OUTPUT
VOLTAGE vs. TEMPERATURE
DIFFERENTIAL OUTPUT VOLTAGE (V)
MAX13448E toc07
DE = RE = HIGH
DI = HIGH
RLOAD = 54Ω
MAX13448E
±80V Fault-Protected Full-Duplex
RS-485 Transceiver
Typical Operating Characteristics (continued)
(VCC = +3.3V, TA = +25°C, unless otherwise noted.)
SINGLE-ENDED DRIVER OUTPUT
HIGH VOLTAGE vs. SOURCE CURRENT
OUTPUT SOURCE CURRENT (mA)
OUTPUT HIGH VOLTAGE (V)
MAX13448E toc08
DE = RE = HIGH
DI = HIGH
SINGLE-ENDED DRIVER SINK CURRENT
vs. OUTPUT LOW VOLTAGE
OUTPUT SINK CURRENT (mA)
OUTPUT LOW VOLTAGE (V)
MAX13448E toc09
DE = RE = HIGH
DI = HIGH
SHUTDOWN CURRENT vs. TEMPERATURE
TEMPERATURE (°C)
SHUTDOWN CURRENT (
MAX13448E toc10
400ns
DRIVER PROPAGATION DELAY (500kbsp)
2V/div
1V/div
MAX13448E toc11
400ns
RECEIVER PROPAGATION DELAY (500kbsp)
1V/div
2V/div
MAX13448E toc12
DRIVER PROPAGATION DELAY
vs. TEMPERATURE
PROPAGATION DELAY (ns)
MAX13448E toc13
DE = RE = HIGH
RLOAD = 54Ω
CLOAD = 50pF
tDPLH
tDPHL
RECEIVER PROPAGATION DELAY
vs. TEMPERATURE
PROPAGATION DELAY (ns)
MAX13448E toc14
DE = RE = LOW
CLOAD = 20pF
tRPLH
tRPHL

Partno	Mfg	Dc	Qty	Available	Descript
MAX13448EESD+T	MAIXM	N/a	2500	avai	±80V Fault-Protected, Full-Duplex RS-485 Transceiver