MAX202E(2005) Ver la hoja de datos (PDF) - Maxim Integrated
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MAX202E Datasheet PDF : 25 Pages
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±15kV ESD-Protected, +5V RS-232 Transceivers
________________________________________________Pin Descriptions (continued)
MAX211E/MAX213E/MAX241E
PIN
1, 2, 3, 28
4, 9, 18, 23, 27
5, 8, 19, 22, 26
6, 7, 20, 21
10
11
12, 14
13
15, 16
17
24
25
NAME
T_OUT
R_IN
R_OUT
T_IN
GND
VCC
C1+, C1-
V+
C2+, C2-
V-
EN
EN
SHDN
SHDN
RS-232 Driver Outputs
RS-232 Receiver Inputs
FUNCTION
TTL/CMOS Receiver Outputs. For the MAX213E, receivers R4 and R5 are active in shutdown
mode when EN = 1. For the MAX211E and MAX241E, all receivers are inactive in shutdown.
TTL/CMOS Driver Inputs. Only the MAX211E, MAX213E, and MAX241E have internal pullups to VCC.
Ground
+4.5V to +5.5V Supply Voltage
Terminals for Positive Charge-Pump Capacitor
+2VCC Voltage Generated by the Charge Pump
Terminals for Negative Charge-Pump Capacitor
-2VCC Voltage Generated by the Charge Pump
Receiver Enable—Active Low (MAX211E, MAX241E)
Receiver Enable—Active High (MAX213E)
Shutdown Control—Active High (MAX211E, MAX241E)
Shutdown Control—Active Low (MAX213E)
+5.5V
0.1µF*
ISHDN
0.1µF*
0.1µF*
0.1µF*
+5.5V
C1+
VCC
V+
C1-
MAX206E
C2+ VCC
MAX211E
MAX213E
0.1µF*
V-
C2-
MAX241E
400kΩ
T1 TO T5
T_IN
T_OUT
R1 TO R5
R_OUT
3kΩ
R_IN +5.5V
0V OR +5.5V
DRIVE
EN (EN)
5kΩ
+5.5V (0V)
SHDN (SHDN)
GND
( ) ARE FOR MAX213E
* 1µF FOR MAX241E
CAPACITORS MAY BE
POLARIZED OR UNPOLARIZED
Figure 1. Shutdown-Current Test Circuit (MAX206E,
MAX211E/MAX213E/MAX241E)
EN
+3V
INPUT
RECEIVER
OUTPUT
CL = 150pF
0V
OUTPUT ENABLE TIME
+3.5V
+0.8V
+3V
NOTE:
POLARITY OF EN
IS REVERSED
FOR THE
MAX213E
EN 0V
INPUT
VOH
RECEIVER
OUTPUTS
VOL
OUTPUT DISABLE TIME
VOH - 0.1V
RL = 1kΩ
VOL + 0.1V
+2.5V
Figure 2. Receiver Output Enable and Disable Timing
(MAX205E/MAX206E/MAX211E/MAX213E/MAX241E)
8 _______________________________________________________________________________________
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