1ꢀ5k EꢁD-ꢂrotected, +ꢀk Rꢁ-232 Transceivers
________________________________________________ꢂin Descriptions (continued)
MAX211E/MAX213E/MAX241E
PIN
NAME
T_OUT
R_IN
FUNCTION
1, 2, 3, 28
RS-232 Driver Outputs
RS-232 Receiver Inputs
4, 9, 18, 23, 27
TTL/CMOS Receiver Outputs. For the MAX213E, receivers R4 and Rꢀ are active in shutdown
mode when EN = 1. For the MAX211E and MAX241E, all receivers are inactive in shutdown.
ꢀ, 8, 19, 22, 26
R_OUT
6, 7, 20, 21
10
T_IN
GND
TTL/CMOS Driver Inputs. Only the MAX211E, MAX213E, and MAX241E have internal pull-ups to V
CC.
Ground
11
12, 14
13
V
+4.ꢀV to +ꢀ.ꢀV Supply Voltage
Terminals for positive charge-pump capacitor
CC
C1+, C1-
V+
+2V
voltage generated by the charge pump
CC
1ꢀ, 16
17
C2+, C2-
V-
Terminals for negative charge-pump capacitor
-2V voltage generated by the charge pump
CC
Receiver Enable—active low (MAX211E, MAX241E)
Receiver Enable—active high (MAX213E)
EN
EN
24
2ꢀ
SHDN
SHDN
Shutdown Control—active high (MAX211E, MAX241E)
Shutdown Control—active low (MAX213E)
I
SHDN
+5.5V
+3V
EN
INPUT
0.1µF
0.1µF
*
*
0V
V
CC
C1+
C1-
C2+
C2-
V+
OUTPUT ENABLE TIME
+3.5V
0.1µF
*
0.1µF
*
MAX206E
MAX211E
MAX213E
MAX241E
V-
V
CC
RECEIVER
OUTPUT
+0.8V
+3V
0.1µF
*
C
L
= 150pF
400k
T1 TO T5
T_OUT
T_IN
+5.5V
0V
EN
INPUT
3k
R1 TO R5
+5.5V
NOTE:
R_IN
5k
OUTPUT DISABLE TIME
- 0.1V
R_OUT
EN (EN)
POLARITY OF EN
IS REVERSED
FOR THE
0V OR +5.5V
DRIVE
V
V
OH
OH
RECEIVER
OUTPUTS
+2.5V
MAX213E
R = 1kΩ
L
V
OL
SHDN (SHDN)
+5.5V (0V)
V
+ 0.1V
OL
GND
( ) ARE FOR MAX213E
CAPACITORS MAY BE
POLARIZED OR UNPOLARIZED
1µF FOR MAX241E
*
Figure 1. Shutdown-Current Test Circuit (MAX206E,
MAX211E/MAX213E/MAX241E)
Figure 2. Receiver Output Enable and Disable Timing
(MAX205E/MAX206E/MAX211E/MAX213E/MAX241E)
8
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
