MAX14948 Datasheet, PDF (2/21 Pages) Maxim Integrated Products – 5kVRMS Isolated 500kbps Half-Duplex RS-485

MAX14948
5kV_RMS Isolated 500kbps Half-Duplex RS-485/
RS-422 Transceiver with ±30kV ESD Protection
Absolute Maximum Ratings
VDDA to GNDA .......................................................-0.3V to +6V
VDDB to GNDB........................................................-0.3V to +6V
VLDO to GNDB......................................................-0.3V to +16V
TXD, DE, RE to GNDA ............................................-0.3V to +6V
SBA, RXD to GNDA .............................. -0.3V to (VDDA + 0.3V)
A, B to GNDB............................................................-8V to +13V
Short Circuit Duration (RXD, SBA to GNDA,
A, B, VDDB to GNDB).............................................Continuous
Continuous Power Dissipation (T_A = +70°C)
16-pin W SOIC
(derate 14.1mW/°C above +70°C)........................... 1126.8mW
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.
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 = 1.71V to 5.5V, VDDB – VGNDB = 4.5V to 5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are
at VDDA – VGNDA = 3.3V, VDDB – VGNDB = 5V, VGNDA = VGNDB, and TA = +25°C.) (Notes 2, 3)
PARAMETER
POWER
Supply Voltage
Supply Current
Undervoltage-Lockout Threshold
Undervoltage-Lockout
Threshold Hysteresis
LDO
SYMBOL
V_DDA
V_DDB
I_DDA
I_DDB
V_UVLOA
V_UVLOB
V_UVHYSTA
V_UVHYSTB
CONDITIONS
VDDA = 5V, DE = high, RE = TXD =
low, RXD unconnected, no bus load
DE = high, RE = TXD = low, RXD un-
connected, no bus load, VDDB = 5V
VDDA rising
VDDB rising
MIN
1.71
4.5
1.50
2.55
LDO Supply Voltage
VLDO
Relative to GNDB, LDO is on (Note 4) 4.68
LDO Supply Current
LDO Output Voltage
LDO Current Limit
ILDO
DE = high, RE = TXD = low, no bus
load, VLDO = 5.5V
VDDB
4.5
Load Regulation
Line Regulation
Dropout Voltage
VLDO = 5.68V, ILOAD = 20mA to 40mA
VLDO = 5.68V to 14V, ILOAD = 20mA
VLDO = 4.68V, IDDB = -120mA
TYP MAX
5.5
5.5
4
6.6
6.3 12.5
1.58 1.65
2.7 2.85
50
200
14
6.5 12.9
5
5.5
300
0.19 1.7
0.12 1.8
100 180
UNITS
V
mA
V
mV
V
mA
V
mA
mV/mA
mV/V
mV
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