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參數資料
| 型號： | MAX3232 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 3.0V to 5.5V, Low-Power, up to 1Mbps, True RS-232 Transceivers Using Four 0.1μF External Capacitors(3V~5.5V,關閉方式下接收器有效,120kbps，RS-232收發(fā)器) |
| 中文描述： | 3.0V至5.5V、低功耗、1Mbps、真RS-232收發(fā)器，使用四只0.1µF外部電容 |
| 文件頁數： | 7/16頁 |
| 文件大?。?/td> | 214K |
| 代理商： | MAX3232 |
M
3.0V to 5.5V, Low-Power, up to 1Mbps, True RS-232
Transceivers Using Four 0.1μF External Capacitors
_______________________________________________________________________________________
7
_______________Detailed Desc ription
Dual Charge-Pump V oltage Converter
The MAX3222/MAX3232/MAX3237/MAX3241’s internal
power supply consists of a regulated dual charge pump
that provides output voltages of +5.5V (doubling charge
pump) and -5.5V (inverting charge pump), regardless of
the input voltage (V
CC
) over the 3.0V to 5.5V range. The
charge pumps operate in a discontinuous mode; if the
output voltages are less than 5.5V, the charge pumps
are enabled, and if the output voltages exceed 5.5V, the
charge pumps are disabled. Each charge pump
requires a flying capacitor (C1, C2) and a reservoir
capacitor (C3, C4) to generate the V+ and V- supplies.
RS -232 T ransmitters
The transmitters are inverting level translators that con-
vert CMOS-logic levels to 5.0V EIA/TIA-232 levels.
The MAX3222/MAX3232/MAX3241 transmitters guaran-
tee a 120kbps data rate with worst-case loads of 3k
in
parallel with 1000pF, providing compatibility with PC-to-
PC communication software (such as LapLink ).
Typically, these three devices can operate at data rates
of 235kbps. Transmitters can be paralleled to drive multi-
ple receivers or mice.
The MAX3222/MAX3237/MAX3241’s output stage is
turned off (high impedance) when the device is in shut-
down mode. When the power is off, the MAX3222/
MAX3232/MAX3237/MAX3241 permit the outputs to be
driven up to ±12V.
The transmitter inputs do not have pull-up resistors.
Connect unused inputs to GND or V
CC
.
MAX 3237 MegaBaud Operation
In normal operating mode (MBAUD = GND), the
MAX3237 transmitters guarantee a 250kbps data rate
with worst-case loads of 3k
in parallel with 1000pF.
This provides compatibility with PC-to-PC communica-
tion software, such as Laplink.
For higher speed serial communications, the MAX3237
features MegaBaud operation. In MegaBaud operating
mode (MBAUD = V
CC
), the MAX3237 transmitters guar-
antee a 1Mbps data rate with worst-case loads of 3k
in
parallel with 250pF for 3.0V < V
CC
< 4.5V. For 5V ±10%
operation, the MAX3237 transmitters guarantee a 1Mbps
data rate into worst-case loads of 3k
in parallel with
1000pF.
MAX3222
MAX3232
MAX3237
MAX3241
5k
R_ IN
R_ OUT
EN
*
C2-
C2+
C1-
C1+
V-
V+
V
CC
C4
C3
C1
C2
0.1
μ
F
V
CC
SHDN
*
T_ OUT
T_ IN
GND
V
CC
0V
7k
150pF
MAX3222
MAX3232
MAX3237
MAX3241
5k
R_ IN
R_ OUT
EN
*
C2-
C2+
C1-
C1+
V-
V+
V
CC
C4
C3
C1
C2
0.1
μ
F
V
CC
SHDN
*
T_ OUT
T_ IN
GND
V
CC
0V
3k
2500pF
MINIMUM SLEW-RATE TEST CIRCUIT
MAXIMUM SLEW-RATE TEST CIRCUIT
*
MAX3222/MAX3241 ONLY
Figure 1. Slew-Rate Test Circuits
LapLink is a trademark of Traveling Software.
相關PDF資料 |
PDF描述 |
|---|---|
| MAX3237 | 3.0V to 5.5V, Low-Power, up to 1Mbps, True RS-232 Transceivers Using Four 0.1μF External Capacitors(3V~5.5V,關閉方式下接收器有效,120kbps，RS-232收發(fā)器) |
| MAX323 | Precision, Single-Supply, SPST Analog Switches |
| MAX324 | Precision, Single-Supply, SPST Analog Switches(接通電阻60Ω,漏電流0.1nA,導通速率150ns單電源,單刀單擲模擬開關) |
| MAX325 | Precision, Single-Supply, SPST Analog Switches(接通電阻60Ω,漏電流0.1nA,導通速率150ns，單電源,單刀單擲，模擬開關) |
| MAX327 | Quad Ultra Low Leakage SPST Analog Switches(接通電阻3500Ω,漏電流0.01nA,導通速率1000ns，單刀單擲模擬開關) |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX3232CAE | 功能描述:RS-232接口集成電路 RoHS:否 制造商:Exar 數據速率: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 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| MAX3232CAE+ | 功能描述:RS-232接口集成電路 3-5.5V 235kbps Transceiver RoHS:否 制造商:Exar 數據速率: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 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| MAX3232CAE+T | 功能描述:RS-232接口集成電路 3-5.5V 235kbps Transceiver RoHS:否 制造商:Exar 數據速率: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 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| MAX3232CAE-T | 功能描述:RS-232接口集成電路 RoHS:否 制造商:Exar 數據速率: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 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| MAX3232CD | 功能描述:RS-232接口集成電路 3-5.5V Multichannel Line Drvr/Rcvr RoHS:否 制造商:Exar 數據速率: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 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
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