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| 型號： | MAX3108EWA+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 13/56頁 |
| 文件大小： | 0K |
| 描述： | IC UART |
| 產(chǎn)品培訓(xùn)模塊： | Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 系列： | * |
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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
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| MAX3109ETJ+ | 功能描述:UART 接口集成電路 Dual Serial UART with 128-Word FIFOs RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
| MAX3109ETJ+T | 功能描述:UART 接口集成電路 Dual Serial UART with 128-Word FIFOs RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
| MAX310C/D | 功能描述:多路器開關(guān) IC RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 開關(guān)數(shù)量:4 開啟電阻（最大值）:7 Ohms 開啟時間（最大值）: 關(guān)閉時間（最大值）: 傳播延遲時間:0.25 ns 工作電源電壓:2.3 V to 3.6 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UQFN-16 |
| MAX310CPE | 功能描述:多路器開關(guān) IC RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 開關(guān)數(shù)量:4 開啟電阻（最大值）:7 Ohms 開啟時間（最大值）: 關(guān)閉時間（最大值）: 傳播延遲時間:0.25 ns 工作電源電壓:2.3 V to 3.6 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UQFN-16 |
| MAX310CPE+ | 功能描述:多路器開關(guān) IC 8:1 Unbuffered RF Video MUX RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 開關(guān)數(shù)量:4 開啟電阻（最大值）:7 Ohms 開啟時間（最大值）: 關(guān)閉時間（最大值）: 傳播延遲時間:0.25 ns 工作電源電壓:2.3 V to 3.6 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UQFN-16 |
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