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參數(shù)資料
| 型號： | MAX3190EUT-T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 通用總線功能 |
| 英文描述： | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| 中文描述： | LINE DRIVER, PDSO6 |
| 封裝： | MO-178, SOT-23, 6 PIN |
| 文件頁數(shù)： | 5/8頁 |
| 文件大小： | 154K |
| 代理商： | MAX3190EUT-T |
shows the current waveform for the ±8kV IEC 1000-4-2
Level 4 ESD Contact Discharge test. The Air-Gap test
involves approaching the device with a charged probe.
The Contact Discharge method connects the probe to
the device before the probe is energized.
Power-Supply Decoupling
In most circumstances, 0.1μF bypass capacitors are
adequate for power-supply decoupling. Connect the
bypass capacitors as close to the IC as possible.
Applications Information
Power-Supply Sources
The MAX3190/MAX3190E require ±7.5V to ±12V dual
supplies. For applications where these supply voltages
are not present, a DC-DC converter must be added.
Due to the MAX3190/MAX3190E
’
s low current con-
sumption, a charge pump can provide the proper supply
voltages and requires a minimal amount of board
space and cost.
When using another RS-232 device containing an internal
unregulated charge pump (Tables 1 and 2), the
MAX3190/MAX3190E may be powered from the internal
charge pump (Figure 6). This eliminates the need for
additional external DC-DC converters to generate the
required ±7.5V to ±12V dual supplies. The MAX3190/
MAX3190E are specifically designed to be used with
Maxim
’
s RS-232 products listed in Tables 1 and 2.
Competitive RS-232 devices
’
charge pumps typically
do not have the capability to power these devices.
The MAX3190/MAX3190E can be operated from ±6V to
±7.5V supplies. In this condition, the devices are guar-
anteed to be RS-232-compatible (TOUT
≥
+3.7V).
For applications that have ±4.5V to ±6V supplies avail-
able, please refer to the MAX3188/MAX3189 or
MAX3188E/MAX3189E data sheet.
M
±15kV ESD-Protected, 460kbps,
RS-232 Transmitters in SOT23-6
_______________________________________________________________________________________
5
I
P
100%
90%
36.8%
t
RI
TIME
t
DL
CURRENT WAVEFORM
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
Ir
10%
0
0
AMPERES
Figure 3. Human Body Model Current Waveform
CHARGE-CURRENT
LIMIT RESISTOR
DISCHARGE
RESISTANCE
STORAGE
CAPACITOR
Cs
150pF
R
C
50M
TO 100M
R
D
330
HIGH-
VOLTAGE
DC
SOURCE
DEVICE
UNDER
TEST
Figure 4. IEC 1000-4-2 ESD Test Model
t
R
= 0.7ns TO 1ns
30ns
60ns
t
100%
90%
10%
I
P
I
Figure 5. IEC 1000-4-2 Generator Current Waveform
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