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參數(shù)資料
| 型號： | MAX1482 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Low Power, Slew-Rate-Limited RS-485 Transceivers(250kbps，半雙工，RS-485收發(fā)器) |
| 中文描述： | 20µA、1/8單位負載、限擺率、RS-485收發(fā)器 |
| 文件頁數(shù)： | 8/12頁 |
| 文件大?。?/td> | 142K |
| 代理商： | MAX1482 |
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.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX1483 | Low Power, Slew-Rate-Limited RS-486 Transceivers(250kbps，半雙工，RS-485收發(fā)器) |
| MAX1482CPD | 20A, 1.8-Unit-Load, Slew-Rate-Limited RS-485 Transceivers |
| MAX1482CSD | 20A, 1.8-Unit-Load, Slew-Rate-Limited RS-485 Transceivers |
| MAX1483CSA | 20A, 1.8-Unit-Load, Slew-Rate-Limited RS-485 Transceivers |
| MAX1482ESD | 20A, 1.8-Unit-Load, Slew-Rate-Limited RS-485 Transceivers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX14820EETG+T | 制造商:Maxim Integrated Products 功能描述: |
| MAX14820ETG+ | 功能描述:輸入/輸出控制器接口集成電路 IO-Link Device Transceiver RoHS:否 制造商:Silicon Labs 產(chǎn)品: 輸入/輸出端數(shù)量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray |
| MAX14820ETG+T | 功能描述:輸入/輸出控制器接口集成電路 IO-Link Device Transceiver RoHS:否 制造商:Silicon Labs 產(chǎn)品: 輸入/輸出端數(shù)量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray |
| MAX14820EVKIT# | 功能描述:界面開發(fā)工具 MAX14820/21 EVAL KIT RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
| MAX14821ETG+ | 功能描述:輸入/輸出控制器接口集成電路 NEW RoHS:否 制造商:Silicon Labs 產(chǎn)品: 輸入/輸出端數(shù)量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray |
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