Operating Temperature Range ......................... -40°C to +105°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.
Package Thermal Characteristics
(Note 1)
Junction-to-Ambient Thermal Resistance (θ
JA
) ..............71°C/W
Junction-to-Case Thermal Resistance (θ
JC
) ...................23°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.
DC Electrical Characteristics
(VDDA - VGNDA = 3.0V to 5.5V, VDDB - VGNDB = 3.0V to 5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at
VDDA - VGNDA = 3.3V, VDDB - VGNDB = 3.3V, VGNDA = VGNDB, and TA = +25°C.) (Note 2, 3)
PARAMETER
POWER
Supply Voltage
V
DDA
V
DDB
I
DDA
Supply Current
I
DDB
Undervoltage Lockout
Threshold
Undervoltage Lockout
Threshold Hysteresis
TRANSFORMER DRIVER
Output Resistance
TD1, TD2 Current Limit
Switching Frequency
Duty Cycle
Crossover Dead Time
R
O
I
LIM
f
SW
D
tDEAD
TD1/TD2 = low, IOUT = 300mA
4.5V ≤ V
DDA
≤ 5.5V
3.0V ≤ V
DDA
≤ 3.6V
540
485
350
0.6
785
730
450
50
50
1.5
1300
1170
550
Ω
mA
kHz
%
ns
V
UVLOA
V
UVLOB
V
UVHYSTA
V
UVHYSTB
VDDA = 5V, DE = high,
RE
= TXD =
low, RXD unconnected, no bus load,
TD1/TD2 unconnected
DE = high,
RE
= TXD = low, RXD un-
connected, no bus load, VDDB = 3.3V
RE,
RXD, DE, TXD, V
DDA
rising
TD1/TD2 driver, V
DDA
rising
V
DDB
rising
RE,
RXD, DE, TXD
TD1/TD2 driver
1.50
2.55
2.55
3.0
3.0
4.7
7.4
1.58
2.7
2.7
50
200
200
mV
5.5
5.5
7.7
mA
12.5
1.65
2.85
2.85
V
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
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Maxim Integrated
│
2
MAX14857/MAX14859
5kV
RMS
Isolated 500kbps/25Mbps Full-Duplex
RS-485/RS-422 Transceivers with ±35kV ESD
Protection and Integrated Transformer Driver
DC Electrical Characteristics (continued)
(VDDA - VGNDA = 3.0V to 5.5V, VDDB - VGNDB = 3.0V to 5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at
VDDA - VGNDA = 3.3V, VDDB - VGNDB = 3.3V, VGNDA = VGNDB, and TA = +25°C.) (Note 2, 3)
PARAMETER
LDO
LDO Supply Voltage
LDO Supply Current
LDO Output Voltage
LDO Current Limit
Load Regulation
Line Regulation
Dropout Voltage
LOGIC INTERFACE (TXD, RXD, DE,
RE)
Input High Voltage
Input Low Voltage
Input Hysteresis
Input Capacitance
Input Pullup Current
Input Pulldown Current
Output Voltage High
Output Voltage Low
Short Circuit Output Pullup
Current
Short Circuit Output Pulldown
Current
Tri-State Output Current
DRIVER
RL
= 54Ω, TXD = high or low, DE =
high,
Figure 1a
Differential Driver Output
|VOD|
RL
= 100Ω, TXD = high or low, DE =
high,
Figure 1a
-7V ≤V
CM
≤ +12V,
Figure 1b
Change in Magnitude of Differ-
ential Driver Output Voltage
Driver Common Mode Output
Voltage
ΔV
OD
VOC
RL
= 100Ω or 54Ω,
Figure 1a
(Note 5)
RL
= 100Ω or 54Ω,
Figure 1a
(Note 5)
V
DDB
/
2
1.5
V
2.0
1.5
5
0.2
3
V
V
VIH
VIL
VHYS
CIN
IPU
IPD
VOH
VOL
ISH_PU
ISH_PD
IOZ
Load Capacitance
VLDO = 3.3V, ILOAD = 20mA to 40mA
VLDO = 4V to 9.5V, ILOAD = 20mA
VLDO = 3.18V, IDDB = 120mA
Nominal value (Note 7)
1
0.7 x
VDDA
0.8
220
2
-10
1.5
VDDA
-0.4
0.4
-42
+40
-1
+1
-4.5
4.5
-1.5
10
VLDO
ILDO
VDDB
Relative to GNDB, LDO is on (Note 4)
DE = high,
RE
= TXD = low, no bus
load, VLDO = 5.5V
3.0
3.18
7.5
3.3
300
0.19
0.12
100
1.7
1.8
180
10
14
12.9
3.6
V
mA
V
mA
mV/mA
mV/V
mV
µF
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
RE,
TXD, DE to GNDA
RE,
TXD, DE to GNDA
RE,
TXD, DE to GNDA
RE,
TXD, DE, f = 1MHz
TXD
DE,
RE
RXD to GNDA, IOUT = -4mA
RXD to GNDA, IOUT = 4mA
0V ≤ V
RXD
≤ V
DDA, V
A
- V
B
>
-10mV,
RE
= low
0V ≤ V
RXD
≤ V
DDA, V
A
- V
B
<
-200mV,
RE
= low
0V ≤ V
RXD
≤ V
DDA,
RE
= high
V
V
mV
pF
µA
µA
V
V
mA
mA
µA
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Maxim Integrated
│
3
MAX14857/MAX14859
5kV
RMS
Isolated 500kbps/25Mbps Full-Duplex
RS-485/RS-422 Transceivers with ±35kV ESD
Protection and Integrated Transformer Driver
DC Electrical Characteristics (continued)
(VDDA - VGNDA = 3.0V to 5.5V, VDDB - VGNDB = 3.0V to 5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at
VDDA - VGNDA = 3.3V, VDDB - VGNDB = 3.3V, VGNDA = VGNDB, and TA = +25°C.) (Note 2, 3)
PARAMETER
Change in Magnitude of
Common-Mode Voltage
Driver Short-Circuit Output
Current
Single-Ended Driver Output
Voltage High
Single-Ended Driver Output
Voltage Low
Differential Driver Output Ca-
pacitance
RECEIVER
Input Current (A and B)
Receiver Differential Threshold
Voltage
Receiver Input Hysteresis
Receiver Input Resistance
Differential Input Capacitance
PROTECTION
Thermal-Shutdown Threshold
Thermal-Shutdown Hysteresis
ESD Protection
(A, B, Y, Z Pins to GNDB)
ESD Protection (All Other Pins)
T
SHDN
T
HYST
Human Body Model
IEC 61000-4-2 Air-Gap Discharge
IEC 61000-4-2- Contact Discharge
Human Body Model
Temperature rising
+160
15
±35
±18
±8
±4
kV
kV
°C
°C
IA, IB
VTH
ΔV
TH
RIN
CA,B
DE = GNDA,
VDDB = VGNDB
or 3.6V
-7V ≤ V
CM
≤ +12V
VCM = 0V
-7V ≤ V
CM
≤ +12V, DE = low
Measured between A and B,
DE =
RE
= GNDA at 2MHz
48
12
VIN = +12V
VIN = -7V
-200
-200
-120
20
-10
+250
µA
mV
mV
kΩ
pF
SYMBOL
ΔV
OC
CONDITIONS
RL
= 100Ω or 54Ω,
Figure 1a
(Note 5)
GNDB ≤ V
OUT
≤ +12V, output low
(Note 6)
-7V ≤ V
OUT
≤ V
DDB, output high
(Note 6)
Y and Z outputs, IY,Z = -20mA
Y and Z outputs, IY,Z = +20mA
DE =
RE
= high, f = 4MHz
12
+30
-250
2.2
0.8
MIN
TYP
MAX
0.2
+250
mA
-30
V
V
pF
UNITS
V
IOSD
VOH
VOL
COD
www.maximintegrated.com
Maxim Integrated
│
4
MAX14857/MAX14859
5kV
RMS
Isolated 500kbps/25Mbps Full-Duplex
RS-485/RS-422 Transceivers with ±35kV ESD
Protection and Integrated Transformer Driver
Switching Electrical Characteristics (MAX14857)
(VDDA - VGNDA = 3.0V to 5.5V, VDDB - VGNDB = 3.0V to 5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at
VDDA - VGNDA = 3.3V, VDDB - VGNDB = 3.3V, VGNDA = VGNDB, and TA = +25°C.) (Note 7)
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