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参数资料
| 型号： | MAX3385ECWN |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/12页 |
| 文件大小： | 0K |
| 描述： | IC TXRX LP RS232 250KBPS 18-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 40 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 2/3 |
| 规程： | RS232 |
| 电源电压： | 3 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 18-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 18-SOIC W |
| 包装： | 管件 |
MAX3385E
±15kV ESD-Protected, 3.0V to 5.5V, Low-Power,
up to 250kbps, True RS-232 Transceiver
_______________________________________________________________________________________
5
_______________Detailed Description
Dual Charge-Pump Voltage Converter
The MAX3385E’s internal power supply consists of a
regulated dual charge pump that provides output volt-
ages of +5.5V (doubling charge pump) and -5.5V
(inverting charge pump), over the 3.0V to 5.5V VCC
range. The charge pump operates in discontinuous
mode; if the output voltages are less than 5.5V, the
charge pump is enabled, and if the output voltages
exceed 5.5V, the charge pump is disabled. Each
charge pump requires a flying capacitor (C1, C2) and a
reservoir capacitor (C3, C4) to generate the V+ and V-
supplies (Figure 1).
RS-232 Transmitters
The transmitters are inverting level translators that con-
vert CMOS-logic levels to ±5.0V EIA/TIA-232 levels.
The MAX3385E transmitters 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 paral-
leled to drive multiple receivers or mice.
The MAX3385E’s transmitters are disabled and the out-
puts are forced into a high-impedance state when the
device is in shutdown (SHDN = GND). The MAX3385E
permits the outputs to be driven up to ±12V in shut-
down.
The transmitter inputs do not have pull-up resistors.
Connect unused inputs to GND or VCC.
RS-232 Receivers
The receivers convert RS-232 signals to CMOS-logic
output levels (Table 1).
Shutdown Mode
Supply current falls to less than 1A in shutdown mode
(SHDN = low). When shut down, the device’s charge
pumps are shut off, V+ is pulled down to VCC, V- is
pulled to ground, and the transmitter outputs are dis-
abled (high impedance). The time required to exit shut-
0
SHDN
1
High-Z
T_OUT
Active
R_OUT
Active
MAX3385E
5k
R_ IN
R_ OUT
C2-
C2+
C1-
C1+
V-
V+
VCC
C4
C1
C2
0.1
F
VCC
SHDN
T_ OUT
T_ IN
GND
VCC
7k
150pF
MAX3385E
5k
R_ IN
R_ OUT
C2-
C2+
C1-
C1+
V-
V+
VCC
C4
C3
3k
C3
3k
C1
C2
0.1
F
VCC
SHDN
T_ OUT
T_ IN
GND
VCC
3k
2500pF
MINIMUM SLEW-RATE TEST CIRCUIT
MAXIMUM SLEW-RATE TEST CIRCUIT
Figure 1. Slew-Rate Test Circuits
Table 1. Shutdown Truth Table
Laplink is a trademark of Traveling Software.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX3385ECWN+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: |
| MAX3385ECWN-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: |
| MAX3385EEAP | 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: |
| MAX3385EEAP+ | 制造商:Maxim Integrated Products 功能描述:LINE TRANSMITTER/RCVR 2TR 2TX 2RX 20SSOP - Rail/Tube |
| MAX3385EEAP+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: |
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