Datasheet

MAX3250
±50V Isolated, 3.0V to 5.5V,
250kbps, 2 TX/2 RX, RS-232 Transceiver
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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 referenced to GND, unless otherwise noted.)
V
CC
...........................................................................-0.3V to +6V
ISOCOM...............................................................................±80V
ISOVCC to ISOCOM.................................................-0.3V to +6V
V+ to ISOCOM (Note 1)............................................-0.3V to +7V
V- to ISOCOM (Note 1)............................................+0.3V to -7V
V+ + |V-| (Note 1) ...................................................................13V
Input Voltages
T_IN, SHDN ...........................................................-0.3V to +6V
R_IN to ISOCOM...............................................................±25V
Output Voltages
T_OUT to ISOCOM ........................................................±13.2V
R_OUT.....................................................-0.3V to (V
CC
+ 0.3V)
FAULT....................................................................-0.3V to +6V
C1-, C2-......................................................-0.3V to (V
CC
+ 0.3V)
C1+, C2+, C3+, C3-, C4+, C4-
to ISOCOM .....................................-0.3V to (ISOVCC + 0.3V)
T_OUT Current ..............30mA (continuous), 50mA (peak, 10µs)
R_IN Current..................30mA (continuous), 50mA (peak, 10µs)
ISOCOM Current ...........30mA (continuous), 50mA (peak, 10µs)
Short-Circuit Duration T_OUT to ISOCOM .................Continuous
Continuous Power Dissipation (T
A
= +70°C)
28-Pin SSOP (derate 15mW/°C above +70°C) .......1201.2mW
Operating Temperature Ranges
MAX3250CAI .....................................................0°C to +70°C
MAX3250EAI...................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
ELECTRICAL CHARACTERISTICS
(V
CC
= 3.0V to 5.5V, see Typical Operating Circuit and Table 1 for capacitor values, ISOCOM = GND, T
A
= T
MIN
to T
MAX
, unless oth-
erwise noted. Typical values are at V
CC
= 3.3V and T
A
= +25°C.) (Note 2)
PARAMETER CONDITIONS MIN TYP MAX UNITS
DC CHARACTERISTICS
Supply Current SHDN = V
CC
, no load 15 35 mA
SHDN = GND, V
ISOCOM
= GND 20 45
Supply Current Shutdown
SHDN = GND, V
ISOCOM
= ±50V ±350
µA
Maximum Ground Differential |V
GND
- V
ISOCOM
| 50 V
Isolation Resistance Between GND and ISOCOM 60 kΩ
LOGIC INPUTS
Input Logic Low T_IN, SHDN 0.8 V
V
CC
= 3.3V 2.0
Input Logic High T_IN, SHDN
V
CC
= 5.0V 2.4
V
Transmitter Input Hysteresis 0.5 V
Input Leakage Current T_IN, SHDN -1 ±0.01 +1 µA
RECEIVER OUTPUTS
Output Leakage Current SHDN = GND -10 ±0.05 +10 µA
Output-Voltage Low I
OUT
= 1.6mA 0.4 V
Output-Voltage High I
OUT
= -1.0mA V
CC
- 0.6 V
CC
- 0.1 V
FAULT OUTPUT
Output-Voltage Low
(Open Drain)
I
OUT
= 5mA 0.4 V
Output Leakage Current FAULT not asserted 1 µA
FAULT Trip Level |V
GND
- V
ISOCOM
| 55 V
Note 1: V+ and V- can have a maximum magnitude of 7V, but their absolute difference cannot exceed 13V.