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参数资料
| 型号： | MAX1482ESD |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 通用总线功能 |
| 英文描述： | 20A, 1.8-Unit-Load, Slew-Rate-Limited RS-485 Transceivers |
| 中文描述： | LINE TRANSCEIVER, PDSO14 |
| 封装： | 0.150 INCH, MS-012AB, SOP-14 |
| 文件页数： | 9/12页 |
| 文件大小： | 142K |
| 代理商： | MAX1482ESD |
Low-Power S hutdown Mode
A low-power shutdown mode is initiated by bringing RE
high and DE low. The devices will not shut down unless
both
the driver and receiver are disabled. In shut-
down, the devices typically draw only 0.1μA of supply
current.
RE and DE may be driven simultaneously; the parts are
guaranteed not to enter shutdown if RE is high and DE
is low for less than 50ns. If the inputs are in this state for
at least 600ns, the parts are guaranteed to enter shut-
down.
For the receiver, the t
ZH
and t
ZL
enable times assume
the part was not in the low-power shutdown state. The
t
ZH(SHDN)
and t
ZL(SHDN)
enable times assume the
parts were shut down (see Electrical Characteristics).
It takes the receivers longer to become enabled from
the low-power shutdown state (t
ZH(SHDN)
, t
ZL(SHDN)
)
than from the operating mode (t
ZH
, t
ZL
). (The parts are
in operating mode if the RE , DE inputs equal a logical
0,1 or 1,1 or 0,0.)
Driver Output Protec tion
Excessive output current and power dissipation caused
by faults or by bus contention are prevented by two
mechanisms. A foldback current limit on the output
stage provides immediate protection against short cir-
cuits over the whole common-mode voltage range (see
Typical Operating Characteristics). In addition, a ther-
mal shutdown circuit forces the driver outputs into a
high-impedance state if the die temperature rises
excessively.
Propagation Delay
Digital encoding schemes depend on the driver and
receiver skew. Skew is defined as the difference
between the rising and falling propagation delay times.
Typical propagation delays are shown in Figures 11
and 12 using Figure 10’s test circuit.
The difference in receiver delay times, |t
PLH
- t
PHL
| is
typically under 160ns.
The driver skew times are typically 160ns (800ns max).
M
20μA,
1
8
-Unit-Load, S lew-Rate-Limited
RS -485 Transc eivers
_______________________________________________________________________________________
9
RO
5V/div
B
A
500mV/div
500ns/div
RO
5V/div
A
B
500mV/div
500ns/div
Figure 11. Receiver t
PHL
Figure 12. Receiver t
PLH
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1482ESD+ | 功能描述:RS-422/RS-485 接口 IC Slew-Rate-Limited RS-485 Transceivers RoHS:否 制造商:Maxim Integrated 数据速率:1136 Kbps 工作电源电压:3 V to 5.5 V 电源电流:5.9 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-28 封装:Tube |
| MAX1482ESD+T | 功能描述:RS-485接口IC Slew-Rate-Limited RS-485 Transceivers RoHS:否 制造商:Texas Instruments 数据速率:250 Kbps 工作电源电压:3.3 V 电源电流:750 uA 工作温度范围:- 40 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MAX1482ESD-T | 功能描述:RS-485接口IC RoHS:否 制造商:Texas Instruments 数据速率:250 Kbps 工作电源电压:3.3 V 电源电流:750 uA 工作温度范围:- 40 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MAX14830ETM+ | 功能描述:UART 接口集成电路 Quad Serial UART w/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 |
| MAX14830ETM+T | 功能描述:UART 接口集成电路 Quad Serial UART w/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 |
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