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MAX3238CAI-T Fiches technique(PDF) 4 Page - Maxim Integrated Products

No de pièce MAX3238CAI-T
Description  3.0V to 5.5V, 1μA, up to 250kbps, True RS-232 Transceiver with AutoShutdown Plus
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Fabricant  MAXIM [Maxim Integrated Products]
Site Internet  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX3238CAI-T Fiches technique(HTML) 4 Page - Maxim Integrated Products

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______________________________________________________________Pin Description
7.5
-5.0
-7.5
0
1000
3000
5000
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
-2.5
5.0
LOAD CAPACITANCE (pF)
2000
4000
2.5
0
VOUT+
VOUT
FOR DATA RATES UP TO 250kbps
1 TRANSMITTER 250kbps
4 TRANSMITTERS 15.6kbps
LOADED 3k
Ω + CL
14
4
2
0
0
1000
3000
5000
SLEW RATE
vs. LOAD CAPACITANCE
6
12
LOAD CAPACITANCE (pF)
2000
4000
10
8
+SLEW
–SLEW
1 TRANSMITTER 250kbps
4 TRANSMITTERS 15.6kbps
LOADED 3k
Ω + CL
70
20
10
0
0
1000
3000
5000
SUPPLY CURRENT vs. LOAD CAPACITANCE
WHEN TRANSMITTING DATA
30
60
LOAD CAPACITANCE (pF)
2000
4000
50
40
250kbps
120kbps
20kbps
__________________________________________Typical Operating Characteristics
(VCC = +3.3V, 250kbps data rate, 0.1µF capacitors, all transmitters loaded with 3k
Ω, TA = +25°C, unless otherwise noted.)
+3.0V to +5.5V, 1µA, up to 250kbps, True
RS-232 Transceiver with AutoShutdown Plus
4
_______________________________________________________________________________________
Positive Terminal of Voltage-Doubler Charge-Pump Capacitor
C1+
28
+5.5V Generated by the Charge Pump
V+
27
+3.0V to +5.5V Supply Voltage
VCC
26
NAME
FUNCTION
1
C2+
Positive Terminal of Inverting Charge-Pump Capacitor
2
GND
Ground
PIN
3
C2-
Negative Terminal of Inverting Charge-Pump Capacitor
4
V-
-5.5V Generated by the Charge Pump
14
FORCEOFF
Force-Off Input. Drive low to shut down transmitters, receivers (except R1OUTB), and on-
board supply. This overrides AutoShutdown Plus and FORCEON (Table 1).
13
FORCEON
Force-Off Input. Drive high to override AutoShutdown Plus, keeping transmitters and
receivers on (FORCEOFF must be high) (Table 1).
8, 9, 11
R_IN
RS-232 Receiver Inputs (R1IN–R3IN)
5, 6, 7, 10, 12
T_OUT
RS-232 Transmitter Outputs (T1OUT–T5OUT)
25
C1-
Negative Terminal of Voltage-Doubler Charge-Pump Capacitor
18, 20, 21
R_OUT
TTL/CMOS Receiver Outputs (R3OUT–R1OUT)
17, 19, 22, 23, 24
T_IN
TTL/CMOS Transmitter Inputs (T5IN–T1IN)
16
R1OUTB
Noninverting Complementary Receiver Output. Always active.
15
INVALID
Output of the Valid Signal Detector. A logic “1” indicates if a valid RS-232 level is present
on receiver inputs.


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