MAX221EEUE Maxim Integrated, MAX221EEUE Datasheet - Page 4

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MAX221EEUE

Manufacturer Part Number
MAX221EEUE
Description
RS-232 Interface IC
Manufacturer
Maxim Integrated
Series
MAX221Er
Datasheet

Specifications of MAX221EEUE

Data Rate
250 Kbps
Operating Supply Voltage
5 V
Supply Current
10 mA
Operating Temperature Range
0 C to + 70 C
Function
Transceiver
Number Of Drivers
1
Number Of I/os
4
Number Of Receivers
1
Propagation Delay Time Ns
0.15 us
Shutdown
Yes

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±15kV ESD-Protected, +5V, 1µA, Single RS-232
Transceiver with AutoShutdown
(V
4
CC
PIN
10
11
12
13
14
15
16
_______________________________________________________________________________________
-10
1
2
3
4
5
6
7
8
9
10
-2
-4
-6
-8
= +5V, 250kbps data rate, 0.1µF capacitors, transmitter loaded with 3k and C
8
6
4
2
0
0
VOLTAGE vs. LOAD CAPACITANCE
1000
TRANSMITTER OUTPUT
FORCEOFF
FORCEON
LOAD CAPACITANCE (pF)
INVALID
NAME
20kbps
ROUT
TOUT
GND
20kbps
C1+
C2+
V
C1-
C2-
RIN
TIN
EN
V+
2000
V-
CC
120kbps
120kbps
3000
250kbps
4000
250kbps
Receiver Enable Control. Drive low for normal operation. Drive high to force the receiver output
(ROUT) into a high-impedance state.
Positive Terminal of the Voltage Doubler Charge-Pump Capacitor
Positive Voltage Generated by the Charge Pump
Negative Terminal of the Voltage Doubler Charge-Pump Capacitor
Positive Terminal of the Inverting Charge-Pump Capacitor
Negative Terminal of the Inverting Charge-Pump Capacitor
Negative Voltage Generated by the Charge Pump
RS-232 Receiver Input, ±15kV ESD protected
TTL/CMOS Receiver Output
Output of the Invalid Signal Detector. INVALID is pulled low if no valid RS-232 level is present on
the receiver input.
TTL/CMOS Transmitter Input
Drive high to override automatic circuitry, keeping transmitter and charge pump on. FORCEOFF
must be high (Table 1).
RS-232 Transmitter Output, ±15kV ESD Protected
Ground
+4.5V to +5.5V Supply Voltage
Force-Off Input, active low. Drive low to shut down transmitter, receiver, and on-board charge
pump. This overrides all automatic circuitry and FORCEON (Table 1).
5000
10
50
40
30
20
0
0
+SLEW
1000
LOAD CAPACITANCE
LOAD CAPACITANCE (pF)
SLEW RATE vs.
2000
-SLEW
3000
Typical Operating Characteristics
FUNCTION
4000
5000
L
, T
A
= +25°C, unless otherwise noted.)
50
40
30
20
10
0
0
CURRENT vs. LOAD CAPACITANCE
120kbps
1000
250kbps
Pin Description
OPERATING SUPPLY
LOAD CAPACITANCE (pF)
2000
3000
20kbps
4000
5000

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