參數(shù)資料
型號(hào)： MAX3483E
廠商： Maxim Integrated Products, Inc.
英文描述： QVGA-VGA 27-Bit Display Serial Interface Transmitter 48-BGA MICROSTAR JUNIOR -40 to 85
中文描述： 3.3V供電、±15kV ESD保護(hù)、12Mbps、限擺率、真RS-485/RS-422收發(fā)器
文件頁(yè)數(shù)： 11/16頁(yè)
文件大小： 231K
代理商： MAX3483E
_____________________Func tion Tables
Devic es with Rec eiver/Driver Enable
(MAX3483E/MAX3485E/MAX3486E/MAX3491E)
Table 1. Transmitting
*B and A outputs are Z and Y, respectively, for full-duplex part
(MAX3491E).
X = Don’t care; High-Z = High impedance
Table 2. Receiving
*DE is a “don’t care” (x) for the full-duplex part (MAX3491E).
X = Don’t care; High-Z = High impedance
Devic es without Rec eiver/Driver Enable
(MAX 3488E/MAX 3490E)
Table 3. Transmitting
INPUT
OUTPUTS
DI
Z
Y
1
0
1
0
1
0
Table 4. Receiving
INPUTS
A, B
≥
+0.2V
≤
-0.2V
Inputs Open
___________Applic ations Information
The MAX3483E/MAX3485E/MAX3486E/MAX3488E/
MAX3490E/MAX3491E are low-power transceivers for
RS-485 and RS-422 communications. The MAX3483E
and MAX3488E can transmit and receive at data rates
up to 250kbps, the MAX3486E at up to 2.5Mbps, and the
MAX3485E/MAX3490E/MAX3491E at up to 12Mbps. The
MAX3488E/MAX3490E/MAX3491E are full-duplex trans-
ceivers, while the MAX3483E/MAX3485E/MAX3486E are
half-duplex. Driver Enable (DE) and Receiver Enable
(
RE
) pins are included on the MAX3483E/MAX3485E/
MAX3486E/MAX3491E. When disabled, the driver and
receiver outputs are high impedance.
Reduc ed EMI and Reflec tions
(MAX 3483E/MAX 3486E/MAX 3488E)
The MAX3483E/MAX3488E are slew-rate limited, mini-
mizing EMI and reducing reflections caused by improp-
erly terminated cables. Figure 13 shows the driver
output waveform of a MAX3485E/MAX3490E/MAX3491E
transmitting a 125kHz signal, as well as the Fourier
analysis of that waveform. High-frequency harmonics
with large amplitudes are evident. Figure 14 shows the
same information, but for the slew-rate-limited
MAX3483E/MAX3488E transmitting the same signal. The
high-frequency harmonics have much lower amplitudes,
and the potential for EMI is significantly reduced.
Low-Power S hutdown Mode
(MAX3483E/MAX3485E/MAX3486E/MAX3491E)
A low-power shutdown mode is initiated by bringing both
RE
high and DE low. The devices will not shut down
unless both the driver and receiver are disabled (high
impedance). In shutdown, the devices typically draw
only 2nA of supply current.
For these devices, the t
PSH
and t
PSL
enable times
assume the part was in the low-power shutdown mode;
the t
PZH
and t
PZL
enable times assume the receiver or
driver was disabled, but the part was not shut down.
M
3.3V-Powered, ±15kV ESD-Protected, 12Mbps and
Slew-Rate-Limited True RS-485/RS -422 Transceivers
______________________________________________________________________________________
11
INPUTS
OUTPUTS
RE
X
X
0
1
DE
DI
B*
A*
MODE
1
1
0
0
1
0
X
X
0
1
1
0
Normal
Normal
Normal
Shutdown
High-Z
High-Z
High-Z
High-Z
INPUTS
RE
0
0
0
1
DE
A, B
≥
+0.2V
≤
-0.2V
Inputs Open
X
RO
MODE
0*
0*
0*
0
1
0
1
Normal
Normal
Normal
Shutdown
High-Z
OUTPUTS
OUTPUT
RO
1
0
1
5MHz
500kHz/div
0
10dB/div
5MHz
500kHz/div
0
10dB/div
Figure 13. Driver Output Waveform and FFT Plot of MAX3485E/
MAX3490E/MAX3491E Transmitting a 125kHz Signal
Figure 14. Driver Output Waveform and FFT Plot of
MAX3483E/ MAX3488E Transmitting a 125kHz Signal
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX3483ECPA 功能描述:RS-422/RS-485 接口 IC RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube
MAX3483ECPA+ 功能描述:RS-422/RS-485 接口 IC 3.3V 12Mbps Transceiver RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube
MAX3483ECSA 功能描述:RS-422/RS-485 接口 IC RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube
MAX3483ECSA+ 功能描述:RS-422/RS-485 接口 IC 3.3V 12Mbps Transceiver RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube
MAX3483ECSA+T 功能描述:RS-422/RS-485 接口 IC 3.3V 12Mbps Transceiver RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube
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