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| 型号： | MAX3223ECTP+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 17/19页 |
| 文件大小： | 0K |
| 描述： | IC TXRX RS232 250KBPS SD 20-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 2/2 |
| 规程： | RS232 |
| 电源电压： | 3 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-WQFN 裸露焊盘 |
| 供应商设备封装： | 20-TQFN-EP（5x5） |
| 包装： | 管件 |
| 产品目录页面： | 1405 (CN2011-ZH PDF) |
±15kV ESD-Protected, 1A, 3.0V to 5.5V, 250kbps,
RS-232 Transceivers with AutoShutdown
_______________Detailed Description
Dual Charge-Pump Voltage Converter
The MAX3221E/MAX3223E/MAX3243E’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), over the
+3.0V to +5.5V VCC range. The charge pumps operate
in discontinuous mode: if the output voltages are less
than 5.5V, the charge pumps are enabled; 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 Transmitters
The transmitters are inverting level translators that con-
vert CMOS-logic levels to 5.0V EIA/TIA-232 levels. They
guarantee a 250kbps data rate with worst-case loads
of 3k
in parallel with 1000pF, providing compatibility
with PC-to-PC communication software such as
LapLink. Transmitters can be paralleled to drive mul-
tiple receivers. The MAX3243E has been specifically
designed to drive serial mice. Figure 1 shows a com-
plete system connection. When FORCEOFF is driven to
ground, or the AutoShutdown circuitry senses invalid
voltage levels on all receiver inputs, the transmitters are
disabled and the outputs are forced into a high-imped-
ance state. When powered off or shut down, the output
can be driven up to ±12V. The transmitter inputs do not
have pull-up resistors.
Pin Description (continued)
PIN
MAX3221E
MAX3223E
MAX3243E
TQFN-
EP
SSOP/
TSSOP
TQFN-
EP
DIP/
SSOP/
TSSOP
SO/
SSOP/
TSSOP
TQFN-
EP
NAME
FUNCTION
—
19, 20
R_OUTB
Noninverting Complementary Receiver Outputs.
Always active.
—
9, 16,
25, 32
N.C.
No Connection. Not internally connected.
—
EP
Exposed Paddle (TQFN package only). Solder the exposed
paddle to the ground plane or leave unconnected.
MAX3243E
I/O
CHIP
WITH
UART
CPU
RS-232
POWER-
MANAGEMENT
UNIT OR
KEYBOARD
CONTROLLER
FORCEOFF
FORCEON
INVALID
Figure 1. Interface Under Control of PMU
LapLink is a trademark of Traveling Software.
Maxim Integrated
7
MAX3221E/MAX3223E/MAX3243E
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX3223ECTP+ | 功能描述:RS-232接口集成电路 3-5.5V 1Mbps Transceiver RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: |
| MAX3223ECTP+T | 功能描述:RS-232接口集成电路 3-5.5V 1Mbps Transceiver RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: |
| MAX3223ECTP-T | 功能描述:RS-232接口集成电路 RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: |
| MAX3223ECUE | 制造商:Exar Corporation 功能描述:Line Transceiver, 2-Driver, 2-Receiver, 20 Pin, Plastic, TSSOP |
| MAX3223ECUP | 功能描述:RS-232接口集成电路 RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: |
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