参数资料
| 型号： | MAX3140EEI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 3/36页 |
| 文件大小： | 0K |
| 描述： | IC UART W/RS485 28-QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 特点： | 收发器 |
| FIFO's： | 8 字节 |
| 规程： | RS232，RS485 |
| 电源电压： | 4.75 V ~ 5.25 V |
| 带IrDA 编码器/解码器： | 是 |
| 带故障启动位检测功能： | 是 |
| 带CMOS： | 是 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-QSOP |
| 供应商设备封装： | 28-QSOP |
| 包装： | 管件 |
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MAX3140
SPI/MICROWIRE-Compatible UART with Integrated
True Fail-Safe RS-485/RS-422 Transceivers
______________________________________________________________________________________
11
Pin Description
UART Crystal Connection. Leave X2 unconnected for external clock. See the
Crystals,
Oscillators, and Ceramic Resonators section.
X2
1
2
UART Crystal Connection. X1 also serves as an external clock input. See the
Crystals,
Oscillators, and Ceramic Resonators section.
X1
2
3
4
UART Request-to-Send Active-Low Output. Controlled by the RTS bit. Use to control the dri-
ver enable in RS-485 networks.
RTS
4
UART Clear-to-Send Active-Low Input. Read via the CTS bit.
CTS
3
5
6
UART Asynchronous Serial-Data (transmitter) Output
TX
6
7
8
Ground
GND
8
RS-485 Half/Full-Duplex Selector Pin. Connect H/F to VCC for half-duplex mode; connect H/F
to GND or leave it unconnected for full-duplex mode.
H/F
7
UART Asynchronous Serial-Data (receiver) Input. The serial information received from the modem
or RS-232/RS-485 receiver. A transition on RX while in shutdown generates an interrupt (Table 1).
RX
5
9
10
RS-485 Receiver Output Enable. Drive RE low to enable RO; RO is high impedance when RE
is high. Drive RE high and DE low to enter low-power shutdown mode.
RE
10
11
12
RS-485 Driver Input. With DE high, a low on DI forces noninverting output low and inverting
output high. Similarly, a high on DI forces noninverting output high and inverting output low.
DI
12
RS-485 Driver Output Enable. Drive DE high to enable driver outputs. These outputs are high
impedance when DE is low. Drive RE high and DE low to enter low-power shutdown mode.
DE
11
13
14
No Connection. Not internally connected.
N.C.
14
15
—
RS-485 Noninverting Driver Output
Y
16
RS-485 Transmitter Phase. Connect TXP to GND or leave it unconnected for normal transmit-
ter phase/polarity. Connect TXP to VCC to invert the transmitter phase/polarity.
TXP
15
RS-485 Transceiver Slew-Rate-Limit Selector Pin. Connect SRL to GND for a 10Mbps com-
munication rate, connect SRL to VCC for a 500kbps rate, or leave SRL unconnected for a
115kbps rate.
SRL
13
RS-485 Receiver Output. When RE is low and if A - B
≥ -50mV, RO will be high; if A - B ≤
-200mV, RO will be low.
RO
9
16
17
No Connection. Not internally connected.
N.C.
17
—
18
RS-485 Inverting Receiver Input and RS-485 Inverting Driver Output*
Z
—
RS-485 Inverting Driver Output
Z
18
—
19
RS-485 Receiver Input Resistors*
B
—
20
RS-485 Receiver Input Resistors*
A
—
RS-485 Noninverting Receiver Input
A
20
RS-485 Inverting Receiver Input
B
19
RS-485 Noninverting Receiver Input and RS-485 Noninverting Driver Output*
Y
—
FULL
DUPLEX
HALF
DUPLEX
PIN
NAME
FUNCTION
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX3140EEI+ | 功能描述:UART 接口集成电路 SPI/uWire Compatible 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 |
| MAX3140EEI+T | 功能描述:UART 接口集成电路 SPI/uWire Compatible 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 |
| MAX3140EEI-T | 功能描述:UART 接口集成电路 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 |
| MAX3147NC SPL | 制造商:Toshiba America Electronic Components 功能描述:NORTEL HDD - Bulk |
| MAX314C/D | 功能描述:模拟开关 IC 10Ohm Quad SPST CMOS Analog Switches RoHS:否 制造商:Texas Instruments 开关数量:2 开关配置:SPDT 开启电阻（最大值）:0.1 Ohms 切换电压（最大）: 开启时间（最大值）: 关闭时间（最大值）: 工作电源电压:2.7 V to 4.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:DSBGA-16 |
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