Datasheet

MAX3325
3V Dual RS-232 Transceiver with
LCD Supply and Contrast Controller
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +3.0V to +3.6V, V
L
= +3.3V, circuit and components of Figure 1, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values
are at V
DD
= +3.3V, T
A
= +25°C.)
CONDITIONS UNITSMIN TYP MAXPARAMETER
LCD Line Regulation 3V < V
DD
< 3.6V, V
LCD
= -4.0V 10 mV
LCD Adjustment Range Load = -3mA -5 +2 V
Output Voltage R
REF
+ = 10kΩ 1.16 1.21 1.26 V
Load Regulation Load = 12µA to 62µA (sourcing current) 4 mV
Short-Circuit Current 5 mA
Output Voltage No load -1.14 -1.21 -1.28 V
Load Regulation Load = 0 to 50µA (sinking current) 35 mV
Short-Circuit Current 0.125 mA
Logic Threshold High 2 V
Logic Threshold Low 0.8 V
Input Current V
IN
= GND or V
DD
-1 1 µA
Output Voltage Low I
SINK
= 1.6mA 0.4 V
Output Voltage High I
SOURCE
= 1.0mA
0.8 · V
L
V
Input Voltage Range -25 +25 V
Input Threshold Low T
A
= +25°C, V
DD
= 3.3V 0.6 V
Input Threshold High T
A
= +25°C, V
DD
= 3.3V 2.4 V
Input Hysteresis 0.3 V
Input Resistance -15V < V
R_IN
< +15V, T
A
= +25°C 357kΩ
Output Voltage Swing All outputs loaded with 3kΩ to ground ±5 ±5.4 V
Output Resistance V
DD
= V
L
= V+ = V- = 0, V
OUT
= ±2V 300 10M Ω
Short-Circuit Current ±35 ±60 mA
Output Leakage Current
V
DD
= 0 or 3V to 3.6V, V
OUT
= ±12V, transmitters
disabled
±25 µA
POSITIVE REFERENCE VOLTAGE
NEGATIVE REFERENCE VOLTAGE
LOGIC INPUTS (SD232, SDLCD, T1IN, T2IN, UP, DOWN)
TRANSMITTER OUTPUTS
RECEIVER INPUTS
RECEIVER OUTPUTS