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参数资料
| 型号： | MAX221EEUE |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 通用总线功能 |
| 英文描述： | 16-Bit Buffers/Drivers With 3-State Outputs 48-TVSOP -40 to 85 |
| 中文描述： | LINE TRANSCEIVER, PDSO16 |
| 封装： | 4.40 MM, 0.65 MM PITCH, TSSOP-16 |
| 文件页数： | 7/12页 |
| 文件大小： | 177K |
| 代理商： | MAX221EEUE |
Software-Controlled Shutdown
For direct software control, use
INVALID
to indicate a
DTR or Ring Indicator signal. Connect
FORCEOFF
and
FORCEON together to disable AutoShutdown so the
line acts like a
SHDN
input.
±15kV ESD Protection
As with all Maxim devices, ESD-protection structures
are incorporated on all pins to protect against electro-
static discharges encountered during handling and
assembly. The driver output and receiver input of the
MAX221E have extra protection against static electrici-
ty. Maxim’s engineers have developed state-of-the-art
structures to protect these pins against ESD of ±15kV
without damage. The ESD structures withstand high
ESD in all states: normal operation, shutdown, and
powered down. After an ESD event, Maxim’s E versions
keep working without latchup, whereas competing
RS-232 products can latch and must be powered down
to remove latchup.
ESD protection can be tested in various ways; the trans-
mitter output and receiver input of the MAX221E are
characterized for protection to the following limits:
1) ±15kV using the Human Body Model
2) ±8kV using the Contact-Discharge Method
specified in IEC 1000-4-2
3) ±15kV using IEC 1000-4-2’s Air-Gap Method
ESD Test Conditions
ESD performance depends on a variety of conditions.
Contact Maxim for a reliability report that documents
test setup, test methodology, and test results.
Human Body Model
Figure 5a shows the Human Body Model, and Figure
5b shows the current waveform it generates when dis-
charged into a low impedance. This model consists of
a 100pF capacitor charged to the ESD voltage of inter-
est, which is then discharged into the test device
through a 1.5k
resistor.
IEC 1000-4-2
The IEC 1000-4-2 standard covers ESD testing and
performance of finished equipment; it does not specifi-
cally refer to integrated circuits. The MAX221E helps
you design equipment that meets Level 4 (the highest
level) of IEC 1000-4-2, without the need for additional
ESD-protection components.
The major difference between tests done using the
Human Body Model and IEC 1000-4-2 (Figure 6) is
higher peak current in the IEC 1000-4-2 because series
resistance is lower in the IEC 1000-4-2 model. Hence,
M
±15kV ESD-Protected, +5V, 1μA, Single RS-232
Transceiver with AutoShutdown
_______________________________________________________________________________________
7
Figure 3. AutoShutdown Trip Levels
TRANSMITTER ENABLED, INVALID HIGH
R
AUTOSHUTDOWN, TRANSMITTER DISABLED,
1
μ
A SUPPLY CURRENT, INVALID LOW
TRANSMITTER ENABLED, INVALID HIGH
-2.7V
-0.3V
+2.7V
+0.3V
0
INDETERMINATE
INDETERMINATE
V-
V
CC
0
V+
0
V
CC
t
INVL
t
WU
INVALID
REGION
RECEIVER
INPUT
VOLTAGE
(V)
INVALID
OUTPUT
(V)
t
INVH
a)
b)
FORCEON
MASTER SHDN LINE
0.1μF
1M
FORCEOFF
MAX221E
POWER-
MANAGEMENT
UNIT
Figure 4. AutoShutdown with Initial Turn-On to Wake Up a
Mouse or Another System
相关PDF资料 |
PDF描述 |
|---|---|
| MAX221EEAE | 【15kV ESD-Protected, +5V, 1レA, Single RS-232 Transceiver with AutoShutdown |
| MAX221 | Quadruple Bus Buffer Gates With 3-State Outputs 14-TSSOP -40 to 85 |
| MAX221CAE | %V, 1レA, Single RS-232 Transceiver with AutoShutdown |
| MAX221CUE | Quadruple Bus Buffer Gates With 3-State Outputs 14-TSSOP -40 to 85 |
| MAX221EAE | Quadruple Bus Buffer Gates With 3-State Outputs 14-VQFN -40 to 85 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX221EEUE+ | 功能描述:RS-232接口集成电路 15kV ESD-Protected 5V 1uA RS-232 Trx RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: |
| MAX221EEUE+T | 功能描述:RS-232接口集成电路 15kV ESD-Protected 5V 1uA RS-232 Trx RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: |
| MAX221EEUE-T | 功能描述:RS-232接口集成电路 RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: |
| MAX221EUE | 功能描述:RS-232接口集成电路 RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: |
| MAX221EUE+ | 功能描述:RS-232接口集成电路 5V 1uA Single RS-232 Txr w/AutoShut RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: |
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