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参数资料
| 型号： | MAX1481-MAX1486 |
| 厂商： | Maxim Integrated Products, Inc. |
| 英文描述： | Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited, 12Mbps, RS-485/RS-422 Transceivers in レMAX Package |
| 中文描述： | 软件可选，Half-/Full-Duplex，摆率限制，12Mbps的，RS-485/RS-422收发器在レ最大包 |
| 文件页数： | 12/16页 |
| 文件大小： | 184K |
| 代理商： | MAX1481-MAX1486 |
M
Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited,
12Mbps, RS-485/RS-422 Transceivers in μMAX Package
12
______________________________________________________________________________________
Low-Power S hutdown Mode
(MAX 1481 only)
Low-power shutdown mode is initiated by bringing both
RE
high and DE low. In shutdown, the MAX1481 typi-
cally draws 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
shutdown.
Enable times t_
ZH
and t_
Z
L
in the Switching Character-
istics tables assume the part was not in low-power shut-
down. Enable times t_
ZH
(SHDN)
and t_
ZL
(SHDN)
assume
the parts were shut down. It takes drivers and receivers
longer to become enabled from the low-power shutdown
mode (t_
ZH
(SHDN)
, t_
Z
L(SHDN)
) than from the
driver/receiver disable mode (t_
ZH
, t_
Z
L
).
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 becomes
excessive.
V
OH
V
OL
A
B
1V
-1V
1.5V
1.5V
OUTPUT
INPUT
RO
R
PLH
R
PHL
Figure 11. Receiver Propagation Delays
OUTPUT NORMALLY LOW
OUTPUT NORMALLY HIGH
3V
0V
V
CC
RO
RO
0V
1.5V
1.5V
V
OL
+ 0.5V
V
OH
- 0.5V
1.5V
1.5V
R
ZL(SHDN)
, R
ZL
R
LZ
R
ZH(SHDN)
, R
ZH
R
HZ
RE
Figure 12. Receiver Enable and Disable Times
(MAX1481/MAX1484 only)
R
B
RECEIVER
OUTPUT
ATE
A
V
ID
R
Figure 13. Receiver Propagation Delay Test Circuit
20dB/div
250kHz/div
2.5MHz
0Hz
M
Figure 14. Driver Output Waveform and FFT Plot of
MAX1484/MAX1486 Transmitting a 20kHz signal
相关PDF资料 |
PDF描述 |
|---|---|
| MAX1481CUB | Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited, 12Mbps, RS-485/RS-422 Transceivers in レMAX Package |
| MAX1481EUB | Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited, 12Mbps, RS-485/RS-422 Transceivers in レMAX Package |
| MAX1484CUB | Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited, 12Mbps, RS-485/RS-422 Transceivers in レMAX Package |
| MAX1484EUB | Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited, 12Mbps, RS-485/RS-422 Transceivers in レMAX Package |
| MAX1485EUB | Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited, 12Mbps, RS-485/RS-422 Transceivers in レMAX Package |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX14820EETG+T | 制造商:Maxim Integrated Products 功能描述: |
| MAX14820ETG+ | 功能描述:输入/输出控制器接口集成电路 IO-Link Device Transceiver RoHS:否 制造商:Silicon Labs 产品: 输入/输出端数量: 工作电源电压: 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-64 封装:Tray |
| MAX14820ETG+T | 功能描述:输入/输出控制器接口集成电路 IO-Link Device Transceiver RoHS:否 制造商:Silicon Labs 产品: 输入/输出端数量: 工作电源电压: 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-64 封装:Tray |
| MAX14820EVKIT# | 功能描述:界面开发工具 MAX14820/21 EVAL KIT RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
| MAX14821ETG+ | 功能描述:输入/输出控制器接口集成电路 NEW RoHS:否 制造商:Silicon Labs 产品: 输入/输出端数量: 工作电源电压: 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-64 封装:Tray |
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