參數(shù)資料
型號: MAX221ECUE
廠商: MAXIM INTEGRATED PRODUCTS INC
元件分類: 通用總線功能
英文描述: 【15kV ESD-Protected, +5V, 1レA, Single RS-232 Transceiver with AutoShutdown
中文描述: LINE TRANSCEIVER, PDSO16
封裝: 4.40 MM, 0.65 MM PITCH, TSSOP-16
文件頁數(shù): 6/12頁
文件大?。?/td> 177K
代理商: MAX221ECUE
M
±15kV ESD-Protected, +5V, 1μA, Single RS-232
Transceiver with AutoShutdown
6
_______________________________________________________________________________________
1
No
Shutdown
(AutoShutdown)
High-Z
1
High-Z
0
1
0
1
0
1
0
OPERATION
STATUS
X
X
X
0
VALID
RECEIVER
EN
Shutdown
(Forced Off)
X
Normal Operation
(Forced On)
Yes
No
Normal Operation
(AutoShutdown)
Yes
High-Z
Active
Active
Active
High-Z
TOUT
Active
High-Z
0
1
FORCEOFF
1
1
0
1
1
High-Z
Active
High-Z
Active
Active
ROUT
High-Z
Active
X
1
FORCEON
1
0
X
0
0
RS-232 SIGNAL PRESENT
AT RECEIVER INPUT
INVALID
OUTPUT
Yes
High
No
Low
Table 1. Output Control Truth Table
Table 2.
INVALID
Truth Table
Figure 2c. AutoShutdown Logic
+0.3V
-0.3V
INVALID
TO MAX221E
POWER SUPPLY
AND TRANSMITTER
RIN
* TRANSMITTER IS DISABLED, REDUCING SUPPLY CURRENT TO 1
μ
A IF
RECEIVER INPUT IS BETWEEN +0.3V AND -0.3V FOR
AT LEAST
30
μ
s.
30μs
COUNTER
R
+2.7V
-2.7V
INVALID
TO MAX221E
POWER SUPPLY
RIN
* TRANSMITTER IS ENABLED IF:
RECEIVER INPUT IS GREATER THAN +2.7V OR LESS THAN -2.7V.
RECEIVER INPUT HAS BEEN BETWEEN +0.3V AND -0.3V FOR
LESS THAN
30
μ
s.
30μs
COUNTER
R
FORCEOFF
POWER DOWN
INVALID
FORCEON
INVALID IS AN INTERNALLY GENERATED SIGNAL USED BY
AUTOSHUTDOWN LOGIC AND APPEARS AS AN OUTPUT.
POWER DOWN IS ONLY AN INTERNAL SIGNAL. IT CONTROLS THE
OPERATIONAL STATUS OF THE TRANSMITTER AND POWER SUPPLIES.
Figure 2b. Transmitter Enabled Using AutoShutdown
Figure 2a. Entering 1μA Supply Mode via AutoShutdown
x = Don’t care
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