MAX3238CAI+T Maxim Integrated Products, MAX3238CAI+T Datasheet - Page 4

• Manufacturer Part Number: MAX3238CAI+T
• Description: IC TXRX RS-232 TRUE 28-SSOP
• Manufacturer: Maxim Integrated Products
• Type: Transceiverr

Specifications of MAX3238CAI+T

• Number Of Drivers/receivers: 5/3
• Protocol: RS232
• Voltage - Supply: 3 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 28-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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