收藏本站
参数资料
型号： MAX3389EEUG
厂商： MAXIM INTEGRATED PRODUCTS INC
元件分类： 通用总线功能
英文描述： 2.5V, 【15kV ESD-Protected RS-232 Transceivers for PDAs and Cell Phones
中文描述： DUAL LINE TRANSCEIVER, PDSO24
封装： 4.40 MM, 0.65 MM PITCH, MO-153AE, TSSOP-24
文件页数： 6/11页
文件大小： 276K
代理商： MAX3389EEUG
M
2.5V, ±15kV ESD-Protected RS-232
Transceivers for PDAs and Cell Phones
6
_______________________________________________________________________________________
Detailed Description
Dual Charge-Pump
Voltage Converter
The MAX3388E/MAX3389E
’
s internal power supply
consists of a regulated dual charge pump that provides
output voltages of +4.2V (doubling charge pump) and -
4.2V (inverting charge pump), regardless of the input
voltage (V
CC
) over a +2.5V to +3.0V range. The charge
pumps operate in a discontinuous mode: if the output
voltages are less than 4.2V, the charge pumps are
enabled; if the output voltages exceed 4.2V, the charge
pumps are disabled. Each charge pump requires flying
capacitors (C1, C2) and reservoir capacitors (C3, C4)
to generate the V+ and V- supplies.
RS-232 Transmitters
The transmitters are inverting level translators that convert
CMOS-logic levels to ±3.7V EIA/TIA-232-compatible
levels.
The MAX3388E/MAX3389E
’
s transmitters guarantee a
250kbps data rate with loads of 3k
in parallel with
1000pF and 460kbps data rate with loads of 3k
in paral-
lel with 150pF. Figure 1 shows a complete system con-
nection.
These RS-232 output stages are turned off (high
impedance) when the devices are in shutdown mode.
When the power is off, the MAX3388E/MAX3389E permit
the outputs to be driven up to ±12V.
The transmitter inputs do not have pullup resistors.
Connect unused inputs to GND or V
L
.
RS-232 Receivers
The receivers convert RS-232 signals to CMOS-logic
output levels. The MAX3388E/MAX3389E
’
s receivers
have inverting outputs. The outputs are high imped-
ance in shutdown.
Shutdown Mode
Supply current falls to less than 1μA when the
MAX3388E/MAX3389E are placed in shutdown mode
(
SHDN
logic low). When shut down, the device
’
s charge
pumps are turned off, V+ decays to V
CC
, V- is pulled to
ground, the switch is opened, and the transmitter outputs
are disabled (high impedance). The time required to exit
MAX3388E
MAX3389E
I/O
CHIP
WITH
UART
CPU
RS-232
POWER-
MANAGEMENT
UNIT OR
KEYBOARD
CONTROLLER
SHDN
V
L
I/O CHIP
POWER SUPPLY
Figure 1. Interface Under Control of PMU
10
μ
s/div
5V/div
2V/div
T1
T2
V
CC
= +2.5V
C1–C4 = 0.1
μ
F
C
L
= 1000pF, R
L
= 3k
Figure 2. Transmitter Outputs when Exiting Shutdown
Table 1. Shutdown Logic Truth Table
LOUT
SHDN
T R AN SM T T ER
O U TPU T S
High-Z
Active
RECEIVER
OUTPUTS
High-Z
Active
CH ARG E
PU M P
Inactive
Active
SWIT C H
MAX3388E
High-Z
MAX3389E
LIN
LIN
L
H
Open
Closed
LIN
相关PDF资料
PDF描述
MAX3388E Dual LVDS Receiver 8-MSOP -40 to 85
MAX3388ECUG Dual LVDS Receiver 8-MSOP-PowerPAD -40 to 85
MAX3389ECUG Dual LVDS Receiver 8-MSOP-PowerPAD -40 to 85
MAX3441EAPA 【15kV ESD-Protected, 【60V Fault-Protected, 10Mbps, Fail-Safe RS-485/J1708 Transceivers
MAX3442EAPA 【15kV ESD-Protected, 【60V Fault-Protected, 10Mbps, Fail-Safe RS-485/J1708 Transceivers
相关代理商/技术参数
参数描述
MAX3389EEUG+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:
MAX3389EEUG-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:
MAX338C/D 功能描述:多路器开关 IC RoHS:否 制造商:Texas Instruments 通道数量:1 开关数量:4 开启电阻（最大值）:7 Ohms 开启时间（最大值）: 关闭时间（最大值）: 传播延迟时间:0.25 ns 工作电源电压:2.3 V to 3.6 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UQFN-16
MAX338C/D DIE 制造商:Maxim Integrated Products 功能描述:
MAX338CEE 功能描述:多路器开关 IC RoHS:否 制造商:Texas Instruments 通道数量:1 开关数量:4 开启电阻（最大值）:7 Ohms 开启时间（最大值）: 关闭时间（最大值）: 传播延迟时间:0.25 ns 工作电源电压:2.3 V to 3.6 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UQFN-16
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*