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| 型号： | MAX1485EUB+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 4/16页 |
| 文件大小： | 0K |
| 描述： | IC TXRX RS485/RS422 10-UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 1/1 |
| 规程： | RS422，RS485 |
| 电源电压： | 4.75 V ~ 5.25 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-µMAX |
| 包装： | 带卷 (TR) |
MAX1481/MAX1484/MAX1485/MAX1486
Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited,
12Mbps, RS-485/RS-422 Transceivers in MAX Package
12
______________________________________________________________________________________
Low-Power Shutdown Mode
(MAX1481 only)
Low-power shutdown mode is initiated by bringing both
RE high and DE low. In shutdown, the MAX1481 typi-
cally draws only 0.1A 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_ZL 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_ZL(SHDN)) than from the
driver/receiver disable mode (t_ZH, t_ZL).
Driver Output Protection
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.
VOH
VOL
A
B
1V
-1V
1.5V
OUTPUT
INPUT
RO
RPLH
RPHL
Figure 11. Receiver Propagation Delays
OUTPUT NORMALLY LOW
OUTPUT NORMALLY HIGH
3V
0V
VCC
RO
0V
1.5V
VOL + 0.5V
VOH - 0.5V
1.5V
RZL(SHDN), RZL
RLZ
RZH(SHDN), RZH
RHZ
RE
Figure 12. Receiver Enable and Disable Times
(MAX1481/MAX1484 only)
R
B
RECEIVER
OUTPUT
ATE
A
VID
R
Figure 13. Receiver Propagation Delay Test Circuit
20dB/div
250kHz/div
2.5MHz
0Hz
MAX1481/4/5/6-fig14
Figure 14. Driver Output Waveform and FFT Plot of
MAX1484/MAX1486 Transmitting a 20kHz signal
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| MAX1486CUB+ | 功能描述:RS-422/RS-485 接口 IC 12Mbps RS485/RS422 Transceiver 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 |
| MAX1486CUB+T | 功能描述:RS-422/RS-485 接口 IC 12Mbps RS485/RS422 Transceiver 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 |
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