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参数资料
| 型号： | MAX1483ESA |
| 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, PDSO8 |
| 封装： | 0.150 INCH, MS-012AA, SOP-8 |
| 文件页数： | 8/12页 |
| 文件大小： | 142K |
| 代理商： | MAX1483ESA |
M
__________Applic ations Information
The MAX1482/MAX1483 are low-power transceivers for
RS-485 and RS-422 communications. The MAX1482
and MAX1483 are specified for data rates of at least
250kbps. The MAX1482 is a full-duplex transceiver
while the MAX1483 is half duplex. When disabled, the
driver and receiver outputs are high impedance.
The 96k
,
1
/
8
-unit-load receiver input impedance of the
MAX1482/MAX1483 allows up to 256 transceivers on a
bus, compared to the 1-unit load (12k
input imped-
ance) of standard RS-485 drivers (32 transceivers max-
imum). Any combination of MAX1482/MAX1483 and
other RS-485 transceivers with a total of 32 unit loads or
less can be put on the bus.
Reduc ed EMI and Reflec tions
The MAX1482/MAX1483 are slew-rate limited, minimiz-
ing EMI and reducing reflections caused by improperly
terminated cables. Figure 9 shows both the driver out-
put waveform of a MAX1482/MAX1483 transmitting a
125kHz signal and the Fourier analysis of that signal.
High-frequency harmonics have much lower ampli-
tudes, and the potential for EMI is significantly reduced.
20μA,
1
8
-Unit-Load, S lew-Rate-Limited
RS -485 Transc eivers
8
_______________________________________________________________________________________
Figure 9. Driver Output Waveform and FFT, Transmitting
250kbps (125kHz) Signal
Figure 10. Receiver Propagation-Delay Test Circuit
Table 1. Transmitting
Table 2. Receiving
INPUTS
OUTPUTS
RE
DE
DI
Z
Y
X
X
X
1
1
0
1
0
X
0
1
High-Z
1
0
High-Z
X = Don't Care
High-Z = High Impedance
10dB/div
0Hz
500kHz/div
5MHz
TTL IN
t
R
, t
F
< 6ns
D
R
100pF
B
100pF
A
RECEIVER
OUT
R = 54
Z
Y
INPUTS
OUTPUT
RE
DE
*
A-B
RO
0
0
0
1
0
0
0
0
> +0.2V
< -0.2V
Inputs open
X
1
0
1
High-Z
X = Don't Care
High-Z = High Impedance
*
DE = 0 for MAX1483 and is a Don't Care for MAX1482.
相关PDF资料 |
PDF描述 |
|---|---|
| MAX1483CUA | 20A, 1.8-Unit-Load, Slew-Rate-Limited RS-485 Transceivers |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1483ESA+ | 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 |
| MAX1483ESA+T | 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 |
| MAX1483ESA-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 |
| MAX1483EUA+ | 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 |
| MAX1483EUA+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 |
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