参数资料
型号: MAX3108EWA+T
厂商: Maxim Integrated Products
文件页数: 13/56页
文件大小: 0K
描述: IC UART
产品培训模块: Obsolescence Mitigation Program
标准包装: 2,500
系列: *
SPI/I2C UART with 128-Word FIFOs in WLP
MAX3108
20
Maxim Integrated
Auto Transceiver Direction Control
In some half-duplex communication systems, the trans-
ceiver’s transmitter must be turned off when data is
being received in order to not load the bus. This is the
case in half-duplex RS-485 communication. Similarly, in
full-duplex multidrop communication such as RS-485 or
RS-422 V.11, only one transmitter can be enabled at any
one time while the others must be disabled. The MAX3108
can be configured to automatically enable/disable a trans-
ceiver’s transmitter and/or receiver at the hardware level
by controlling its DE and RE pins. This feature relieves the
host processor of this time-critical task.
The RTS output is used to control the transceivers’
transmit-enable input and is automatically set high
when the MAX3108’s transmitter starts transmission.
This occurs as soon as data is present in the transmit
FIFO. Auto transceiver direction control is enabled by
the MODE1[4]: TrnscvCtrl bit. Figure 9 shows a typical
MAX3108 connection in an RS-485 application using the
auto transceiver direction control feature.
The RTS output can be set high in advance of TX
transmission by a programmable time period called the
setup time (Figure 10). The setup time is programmed
by the HDplxDelay[7:4]: Setupx bits. Similarly, the RTS
output can be held high for a programmable period
after the transmitter has completed transmission called
the hold time. The hold time is programmed by the
HDplxDelay[3:0]: Holdx bits.
Figure 10. Setup and Hold times in Auto Transceiver Direction Control
Figure 9. Auto Transceiver Direction Control
TX
FIRST CHARACTER
LAST CHARACTER
RTS
SETUP
HOLD
MAX3108
MAX14840E
TRANSMITTER
TX
B
A
D
RTS
RX
TxFIFO
RECEIVER
AUTO
TRANSCEIVER
CONTROL
RxFIFO
DI
RO
RE
DE
R
相关PDF资料
PDF描述
MAX3109ETJ+ SEMICONDUCTOR OTHER
MAX310CPE IC VIDEO MULTIPLEXER 8X1 16DIP
MAX3110EENI+G36 IC UART SPI COMPAT 28-DIP
MAX3120CUA+ IC TXRX INFRARED IRDA 8-UMAX
MAX3120EUA IC TXRX 3V IRDA IR 3V 8-UMAX
相关代理商/技术参数
参数描述
MAX3109ETJ+ 功能描述:UART 接口集成电路 Dual Serial UART with 128-Word FIFOs RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel
MAX3109ETJ+T 功能描述:UART 接口集成电路 Dual Serial UART with 128-Word FIFOs RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel
MAX310C/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
MAX310CPE 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
MAX310CPE+ 功能描述:多路器开关 IC 8:1 Unbuffered RF Video MUX 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