參數(shù)資料
型號(hào): MAX3294AUT+T
廠商: Maxim Integrated Products
文件頁(yè)數(shù): 2/11頁(yè)
文件大小: 0K
描述: IC TX RS485/422 DIFF SGL SOT23-6
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 1
類型: 收發(fā)器
驅(qū)動(dòng)器/接收器數(shù): 1/0
規(guī)程: RS422,RS485
電源電壓: 3.14 V ~ 3.47 V
安裝類型: 表面貼裝
封裝/外殼: SOT-23-6
供應(yīng)商設(shè)備封裝: SOT-6
包裝: 標(biāo)準(zhǔn)包裝
其它名稱: MAX3294AUT+TDKR
Reduced EMI and Reflections
(MAX3293/MAX3294)
The MAX3293/MAX3294 are slew-rate limited, minimiz-
ing EMI and reducing reflections caused by improperly
terminated cables. Figure 12 shows Fourier analysis of
the MAX3295 transmitting a 125kHz signal. High-fre-
quency harmonics with large amplitudes are evident.
Figure 13 shows the same information, but for the slew-
rate-limited MAX3293, transmitting the same signal.
The high-frequency harmonics have much lower ampli-
tudes, and the potential for EMI is significantly reduced.
To minimize reflections, the line should be terminated at
both ends in its characteristic impedance, and stub
lengths off the main line should be kept as short as
possible. The slew-rate-limited MAX3293 and MAX3294
are more tolerant of imperfect termination.
Driver-Output Protection
Two mechanisms prevent excessive output current and
power dissipation caused by faults or by bus contention.
The first, a foldback current limit on the output stage,
provides immediate protection against short circuits over
the whole common-mode voltage range (see the
Typical
Operating Characteristics). The second, a thermal-shut-
down circuit, forces the driver outputs into a high-imped-
ance state if the die temperature exceeds +160°C.
MAX3293/MAX3294/MAX3295
20Mbps, +3.3V, SOT23 RS-485/
RS-422 Transmitters
10
______________________________________________________________________________________
Figure 12. Driver-Output Waveform and FFT Plot of MAX3295
Transmitting a 125kHz Signal
Figure 13. Driver-Output Waveform and FFT Plot of MAX3293
Transmitting a 125kHz Signal
DRIVER-OUTPUT WAVEFORM AND
FFT PLOT OF MAX3293
10dB/div
Chip Information
PROCESS: BiCMOS
DRIVER-OUTPUT WAVEFORM AND
FFT PLOT OF MAX3295
10dB/div
VCC
Z
DE
16
Y
+
5
GND
DI
MAX3293
MAX3294
MAX3295
SOT23-6
TOP VIEW
2
34
Pin Configuration
Package Information
For the latest package outline information and land patterns
(footprints), go to www.maxim-ic.com/packages. Note that a
“+”, “#”, or “-” in the package code indicates RoHS status only.
Package drawings may show a different suffix character, but
the drawing pertains to the package regardless of RoHS status.
PACKAGE
TYPE
PACKAGE
CODE
OUTLINE
NO.
LAND
PATTERN NO.
6 SOT23
U6CN+2
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參數(shù)描述
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