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參數(shù)資料
| 型號： | MAX3209E |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | ±15kV ESD-Protected, EMC Compliant, 460kbps RS-232 Serial Port for Motherboards/Desktop PCs(±15kV ESD保護,兼容EMC,460kbps RS-232串行端口（6發(fā)10收，用于主板和桌面電腦)) |
| 中文描述： | ±15kV ESD保護、12V、雙路RS-232串口，帶有低功耗待機模式，適用于主板/臺式機 |
| 文件頁數(shù)： | 6/10頁 |
| 文件大小： | 247K |
| 代理商： | MAX3209E |
M
±15kV ESD-Protected, 12V, Dual RS-232 Serial Port
with Low-Power Standby for Motherboards/Desktops
6
_______________________________________________________________________________________
which is then discharged into the device through a
1.5k
resistor.
IEC 1000-4-2
Since January 1996, all equipment manufactured
and/or sold in the European community has been
required to meet the stringent IEC 1000-4-2 specifica-
tion. The IEC 1000-4-2 standard covers ESD testing
and performance of finished equipment; it does not
specifically refer to integrated circuits. The MAX3209E
helps you design equipment that meets Level 4 (the
highest level) of IEC 1000-4-2, without additional ESD-
protection components.
The main difference between tests done using the
Human Body Model and IEC 1000-4-2 is higher peak
current in IEC 1000-4-2. Because series resistance is
lower in the IEC 1000-4-2 ESD test model (Figure 3a),
the ESD withstand voltage measured to this standard is
generally lower than that measured using the Human
Body Model. Figure 3b 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
charge probe. The Contact-Discharge method connects
the probe to the device before the probe is energized.
Machine Model
The Machine Model for ESD testing uses a 200pF stor-
age capacitor and zero-discharge resistance. It mimics
the stress caused by handling during manufacturing
and assembly. Of course, all pins (not just RS-232
inputs and outputs) require this protection during man-
ufacturing. Therefore, the Machine Model is less rele-
vant to the I/O ports than are the Human Body Model
and IEC 1000-4-2.
Applications Information
R5 and R10 Active in Standby Mode
The MAX3209E is placed in standby mode when V
DD
is
not present, provided that V
STBY
remains at +3V to
+5.5V. In standby mode, receivers R5 and R10 remain
active, consuming 100μA max while unloaded. Standby
mode allows activity to be sensed on the serial ports so
that main power can be restored by the power-man-
agement unit, as shown in Figure 4.
Layout Considerations
Use proper layout to ensure other devices on your
board are not damaged in an ESD strike. Currents as
Figure 4. MAX3209E in Standby Mode
POWER-MANAGEMENT UNIT
V
STBY
V
DD
GND
R5
R10
R_
T_
ALL OTHER
RECEIVERS
INACTIVE
ALL TRANSMITTERS
INACTIVE
+12V
SUPER
I/O
MAX3209E
t
R
= 0.7ns to 1ns
30ns
60ns
t
100%
90%
10%
I
P
I
Figure 3b. IEC 1000-4-2 ESD-Generator Current Waveform
SYSTEM POWER-
SUPPLY VOLTAGE
(V)
V
STBY
SUPPLY
VOLTAGE
(V)
3.3
3.3
COMPATIBILITY
Compatible with all
CMOS families.
5
5
Compatible with all
TTL and CMOS fami-
lies.
3.3
5
Compatible with ACT
and HCT CMOS, and
with AC, HC, or
CD4000 CMOS.
Table 1. Logic Family Compatibility with
Various Supply Voltages
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| MAX3209ECUU | 功能描述:RS-232接口集成電路 RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| MAX3209ECUU+ | 功能描述:RS-232接口集成電路 12V 2Ch RS-232 Serial Port RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| MAX3209ECUU+T | 功能描述:RS-232接口集成電路 12V 2Ch RS-232 Serial Port RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| MAX3209ECUU-T | 功能描述:RS-232接口集成電路 RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| MAX3209EEUU | 功能描述:RS-232接口集成電路 RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
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