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参数资料
| 型号： | MAX366CPA+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/12页 |
| 文件大小： | 0K |
| 描述： | IC CIRCUIT PROT SIGNAL-LINE 8DIP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 电压 - 箝位： | ±40V |
| 技术： | 混合技术 |
| 功率（瓦特）： | 727mW |
| 电路数： | 3 |
| 应用： | 通用 |
| 封装/外壳： | 8-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 8-PDIP |
| 包装： | 管件 |
Signal-Line Circuit Protectors
Bipolar Faults
The MAX366/MAX367 V+ and V- pins are normally con-
nected to a circuit’s most positive and most negative
power supplies. When a circuit has multiple power
supplies (such as ±5V and ±12V) and the MAX366/
+5V
MAX367 V+ and V- pins are connected to the lower
supply, it is possible to have fault conditions on both
sides of the signal path at once, if both sides of the
switch have paths to higher voltages. If the polarity of
1
IN1
MAX366
V+
OUT1
8
7
10 μ F
100k
these faults is the same, the signal path will be open
and there is no conflict.
2
IN2
OUT2
6
If the IN and OUT pins are driven in opposite polarities
from low-impedance sources, the lower of the two
3
IN3
OUT3
5
OP AMP
impedances will overcome the higher impedance, just
as if the protector were not present. (Make sure the
current does not exceed the 30mA absolute maximum
rating.) As the lower impedance source approaches
4
V-
and exceeds the fault knee voltage, the protector will
conduct enough current to maintain the other signal pin
near the fault knee voltage. This means when the fault
knee voltage is reached, the current through the pro-
tector shifts from the higher current capability of the
10 μ F
100k
-5V
lower impedance source to the lower current capability
of the higher impedance source.
_______________Typical Applications
Driven Switches
The MAX366/MAX367 have low supply currents
(<1μA), which allows the supply pins to be driven
directly by other active circuitry, instead of connected
directly to the power sources. In this configuration,
the parts can be used as driven fault-protected
switches with V+ or V- pins used as the control pins.
For example, if the V- pin is grounded, you can turn
the V+ pin on and off by driving it with the output of a
CMOS gate. This effectively connects and discon-
nects three or eight separate signal lines at once. (If
bipolar signals or signals that go to ground are being
switched, the V- pin must be driven simultaneously to
a negative potential.) Always ensure that the driving
source(s) does not drive the V+ pin more negative
than the V- pin.
Figure 4 shows a simple turn-on delay that takes
advantage of the MAX366’s low power consumption.
The two RC networks cause gradual application of
power to the MAX366, which in turn applies the input
signals smoothly after the amplifier has stabilized.
The two diodes discharge the two capacitors rapidly
when power is turned off.
Figure 4. Turn-On Delay
This circuit can be tailored to nearly any rate of turn-
on by selecting the RC time constants in the V+ and
V- pins, without affecting the time constant of the
measuring circuit.
Protectors as Circuit Elements
Any of the individual protectors in a MAX366 or MAX367
may be used as a switched resistor, independent of the
functions of other elements in the same package. For
example, Figure 5 shows a MAX366 with two of the pro-
tectors used to protect the input of an op amp, and the
third element used to sequence a power supply.
Combining the circuits of Figures 4 and 5 produces a
delayed action on the switched +5V, as well as smooth
application of signals to the amplifier input.
_________Testing Circuit Protectors
Measuring Path Resistance
Measuring path resistance requires special techniques,
since path resistance varies dramatically with the IN
and OUT voltages relative to the supply voltages.
Conventional ohmmeters should not be used, for two
reasons: 1) the applied voltage and currents are usual-
ly not predictable, and 2) the true resistance is a func-
tion of the applied voltage, which is dramatically altered
by the ohmmeter itself. Autoranging ohmmeters are
particularly unreliable.
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX366CPA+ | 功能描述:隔离器接口集成电路 Signal Line Circuit Protector RoHS:否 制造商:Texas Instruments 通道数量:2 传播延迟时间: 电源电压-最大:5.5 V 电源电压-最小:3 V 电源电流:3.6 mA 功率耗散: 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:SOIC-8 封装:Tube |
| MAX366CSA | 功能描述:TVS二极管阵列 RoHS:否 制造商:Littelfuse 极性: 通道:4 Channels 击穿电压: 钳位电压:11.5 V 工作电压:2.5 V 峰值浪涌电流:20 A 安装风格:SMD/SMT 端接类型:SMD/SMT 系列: 最小工作温度:- 40 C 最大工作温度:+ 85 C |
| MAX366CSA+ | 功能描述:隔离器接口集成电路 Signal Line Circuit Protector RoHS:否 制造商:Texas Instruments 通道数量:2 传播延迟时间: 电源电压-最大:5.5 V 电源电压-最小:3 V 电源电流:3.6 mA 功率耗散: 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:SOIC-8 封装:Tube |
| MAX366CSA+T | 功能描述:隔离器接口集成电路 Signal Line Circuit Protector RoHS:否 制造商:Texas Instruments 通道数量:2 传播延迟时间: 电源电压-最大:5.5 V 电源电压-最小:3 V 电源电流:3.6 mA 功率耗散: 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:SOIC-8 封装:Tube |
| MAX366CSA-T | 功能描述:TVS二极管阵列 RoHS:否 制造商:Littelfuse 极性: 通道:4 Channels 击穿电压: 钳位电压:11.5 V 工作电压:2.5 V 峰值浪涌电流:20 A 安装风格:SMD/SMT 端接类型:SMD/SMT 系列: 最小工作温度:- 40 C 最大工作温度:+ 85 C |
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