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參數(shù)資料
| 型號： | MAX221 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Quadruple Bus Buffer Gates With 3-State Outputs 14-TSSOP -40 to 85 |
| 中文描述： | +5V、1µA、單路RS-232收發(fā)器，帶有AutoShutdown |
| 文件頁數(shù)： | 6/8頁 |
| 文件大?。?/td> | 110K |
| 代理商： | MAX221 |
M
+5V, 1μA, Single RS-232 Transceiver
with AutoShutdown
6
_______________________________________________________________________________________
Table 1. Output Control Truth Table
1
No
Shutdown
(AutoShutdown)
High-Z
1
High-Z
0
1
1
1
OPERATION
STATUS
X
0
VALID
RECEIVER
LEVEL
EN
X
Shutdown
(Forced Off)
X
Normal Operation
(Forced On)
X
0
Yes
Normal Operation
(AutoShutdown)
No
Yes
0
0
High-Z
Active
Active
High-Z
TOUT
Active
High-Z
Active
0
FORCEOFF
1
0
1
1
1
1
High-Z
High-Z
Active
Active
ROUT
High-Z
Active
Active
X
FORCEON
1
X
1
0
0
0
X = Don’t care
RS-232 SIGNAL PRESENT
AT RECEIVER INPUT
INVALID
OUTPUT
Yes
High
No
Low
Table 2.
INVALID
Truth Table
+0.3V
-0.3V
INVALID
TO MAX221
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.
30
μ
s
COUNTER
R
+2.7V
-2.7V
INVALID
TO MAX221
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
Figure 2b. Transmitter Enabled Using AutoShutdown
Figure 2a. Entering 1μA Supply Mode via AutoShutdown
FORCEOFF
POWER DOWN
INVALID
FORCEON
INVALID IS AN INTERNALLY GENERATED SIGNAL USED BY
THE 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 2c. AutoShutdown Logic
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX221CAE | %V, 1レA, Single RS-232 Transceiver with AutoShutdown |
| MAX221CUE | Quadruple Bus Buffer Gates With 3-State Outputs 14-TSSOP -40 to 85 |
| MAX221EAE | Quadruple Bus Buffer Gates With 3-State Outputs 14-VQFN -40 to 85 |
| MAX221EUE | 16-Bit Buffers/Drivers With 3-State Outputs 48-TVSOP -40 to 85 |
| MAX2232 | 16-Bit Buffers/Drivers With 3-State Outputs 48-SSOP -40 to 85 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX2216 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Miniature Chip-Scale GSM900/DCS1800/PCS1900 Power Amplifier |
| MAX2216EBV | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube 制造商:Rochester Electronics LLC 功能描述: |
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| MAX2216EVKIT | 功能描述:放大器 IC 開發(fā)工具 RoHS:否 制造商:International Rectifier 產(chǎn)品:Demonstration Boards 類型:Power Amplifiers 工具用于評估:IR4302 工作電源電壓:13 V to 23 V |
| MAX221CAE | 功能描述:RS-232接口集成電路 RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
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