MAX3248EEAI-T Maxim Integrated, MAX3248EEAI-T Datasheet - Page 4

• Manufacturer Part Number: MAX3248EEAI-T
• Description: RS-232 Interface IC
• Manufacturer: Maxim Integrated
• Series: MAX3238E, MAX3248Er

+3.0V to +5.5V, 10nA, 250kbps RS-232 Transceivers
with ±15kV ESD-Protected I/O and Logic Pins
ELECTRICAL CHARACTERISTICS (continued)
(V
C2–C4 = 0.33µF (tested at 5.0V ±10%), T
Note 2: The transmitter inputs have an active positive feedback resistor. The input current goes to zero when the inputs are at the
Note 3: During AutoShutdown only, a transmitter/receiver edge is defined as a transition through the transmitter/receiver input logic
(V
4
__________________________________________Typical Operating Characteristics
TIMING CHARACTERISTICS
Maximum Data Rate
Receiver Propagation Delay
Receiver Output Enable Time
Receiver Output Disable Time
Transmitter Skew
Receiver Skew
Transition-Region Slew Rate
CC
CC
-1
-2
-3
-4
-5
-6
_______________________________________________________________________________________
6
5
4
3
2
1
0
= +3.3V, 250kbps data rate, 0.1µF capacitors, all transmitters loaded with 3kΩ, T
= +3.0V to +5.5V, C1–C4 = 0.1µF (tested at 3.3V ±5%), C1–C4 = 0.22µF (tested at 3.3V ±10%), C1 = 0.047µF, and
0
supply rails.
wake-up thresholds.
TRANSMITTER OUTPUT VOLTAGE
FOR DATA RATES UP TO 250kbps
1 TRANSMITTER 250kbps
4 TRANSMITTERS 15.6kbps
ALL TRANSMITTERS LOADED
WITH 3kΩ + C
500
PARAMETER
vs. LOAD CAPACITANCE
LOAD CAPACITANCE (pF)
1000
L
1500
2000
V
V
OUT
OUT-
2500
+
3000
R
R_IN to R_OUT,
C
Normal operation
Normal operation
| t
| t
V
T
R
measured from +3V to
-3V or -3V to +3V
A
A
CC
L
L
L
PHL
PHL
= T
= +25°C,
= 3kΩ, C
= 150pF
= 3kΩ to 7kΩ,
= 3.3V,
MIN
- t
- t
12
10
PLH
PLH
8
6
4
2
0
to T
0
L
|
|
SLEW RATE vs. LOAD CAPACITANCE
1 TRANSMITTER 250kbps
4 TRANSMITTERS 15.6kbps
ALL TRANSMITTERS LOADED
WITH 3kΩ + C
MAX
= 1000pF, one transmitter switching
500
, unless otherwise noted. Typical values are at T
CONDITIONS
LOAD CAPACITANCE (pF)
1000
L
1500
t
t
C
C
PHL
PLH
L
L
= 150pF to 1000pF
= 150pF to 2500pF
2000
SR-
2500
SR+
3000
A
= +25°C, unless otherwise noted.)
50
40
30
20
10
0
SUPPLY CURRENT vs. LOAD CAPACITANCE
0
MIN
250
1 TRANSMITTER 20kbps, 120 kbps, 250kbps
4 TRANSMITTERS 15.6kbps
ALL TRANSMITTERS LOADED
WITH 3kΩ + C
6
4
500
WHEN TRANSMITTING DATA
250kbps
LOAD CAPACITANCE (pF)
1000
A
TYP
0.15
0.15
2.6
2.4
50
50
L
= +25°C.)
1500
MAX
2000
30
30
20kbps
120kbps
2500
UNITS
kbps
V/µs
µs
µs
µs
ns
ns
3000