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参数资料
| 型号： | ISL54055 |
| 厂商： | Intersil Corporation |
| 英文描述： | Ultra Low ON-Resistance, Low Voltage, Single Supply, Single SPST/1:2 Distribution Analog Switch |
| 中文描述： | 超低导通电阻，低电压，单电源，单聚苯乙烯/ 1:2分布模拟开关 |
| 文件页数： | 7/12页 |
| 文件大小： | 355K |
| 代理商： | ISL54055 |
7
FN6461.0
March 21, 2007
Detailed Description
The Intersil ISL54054 and ISL54055 devices consist of low
ON-resistance, low voltage, bi-directional analog switches
designed to operate from a single +1.8V to +5.5V supply.
With a single supply of 5V the typical on-resistance is only
0.34
Ω
, with a typical turn-on and turn-off time of: t
ON
= 12ns,
t
OFF
= 12ns. The devices are especially well suited for
portable battery powered equipment due to its low operating
supply voltage (1.8V), low power consumption (5.5
μ
W), low
leakage currents (300nA max) and the tiny
μ
TDFN
package.
These devices have an unique architecture. They have two
signal pins (pin 1 and pin 3) that are simultaneously
connected or disconnected to a single common pin (pin 4)
under the control of a single logic control pin (pin 6). The
ISL54054 switches are OFF when the logic is low and ON
when the logic is high. The ISL54055 are ON when the logic
is low and OFF when the logic is high. This architecture
allows these devices to be used as a single SPST switch or
as a distribution switch to distribute a single source to two
different loads.
SPST operation is achieved by using one of the Nx signal
pins while floating the other Nx signal pin or by externally
connecting the two Nx signal pins together. When both
signal pins are tied together, the r
ON
of the SPST is reduced
by half, from 1
Ω
to 0.5
Ω
(when operated with a 5V supply).
The ISL54054 is a normally open (NO) SPST analog switch.
The ISL54055 is a normally closed (NC) SPST analog
switch.
Supply Sequencing and Overvoltage Protection
With any CMOS device, proper power supply sequencing is
required to protect the device from excessive input currents,
which might permanently damage the IC. All I/O pins contain
ESD protection diodes from the pin to V+ and to GND (see
Figure 6). To prevent forward biasing these diodes, V+ must
be applied before any input signals, and the input signal
voltages must remain between V+ and GND. If these
conditions cannot be guaranteed, then one of the following
two protection methods should be employed.
Logic inputs can easily be protected by adding a 1k
Ω
resistor in series with the input (see Figure 6). The resistor
limits the input current below the threshold that produces
permanent damage, and the sub-microamp input current
produces an insignificant voltage drop during normal
operation.
This method is not acceptable for the signal path inputs.
Adding a series resistor to the switch input defeats the
purpose of using a low r
ON
switch. Connecting schottky
diodes to the signal pins (as shown in Figure 6) will shunt the
fault current to the supply or to ground, thereby protecting
the switch. These schottky diodes must be sized to handle
the expected fault current.
FIGURE 5. CAPACITANCE TEST CIRCUIT
Test Circuits and Waveforms
(Continued)
V+
C
GND
NO or NC
COM
IN
IMPEDANCE
ANALYZER
V
INL
or V
INH
FIGURE 6. OVERVOLTAGE PROTECTION
GND
V
COM
V
NX
V+
IN
X
OPTIONAL
PROTECTION
RESISTOR
OPTIONAL
SCHOTTKY
DIODE
OPTIONAL
SCHOTTKY
DIODE
ISL54054, ISL54055
相关PDF资料 |
PDF描述 |
|---|---|
| ISL54055IRUZ-T | Ultra Low ON-Resistance, Low Voltage, Single Supply, Single SPST/1:2 Distribution Analog Switch |
| ISL54056IRUZ-T | Ultra Low ON-Resistance, +1.65V to +4.5V, Single Supply, Quad SPDT (Dual DPDT) Analog Switch |
| ISL54056 | Ultra Low ON-Resistance, +1.65V to +4.5V, Single Supply, Quad SPDT (Dual DPDT) Analog Switch(超低导通电阻, +1.65V到+4.5V, 单电源, 四路单刀双掷（双路单刀双掷）模拟开关) |
| ISL54057IRUZ-T | Ultra Low ON-Resistance, Low-Voltage, Single Supply, Differential 4 to 1 Analog Multiplexer |
| ISL54057 | Ultra Low ON-Resistance, Low-Voltage, Single Supply, Differential 4 to 1 Analog Multiplexer(超低导通电阻, 低电压, 单电源, 差分4合1模拟开关) |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL54055IRUZ-T | 功能描述:IC SWITCH SPST 6UTDFN RoHS:是 类别:集成电路 (IC) >> 接口 - 模拟开关，多路复用器，多路分解器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:36 系列:- 功能:多路复用器 电路:2 x 4:1 导通状态电阻:75 欧姆 电压电源:单/双电源 电压 - 电源，单路/双路(±):2 V ~ 12 V，±2 V ~ 6 V 电流 - 电源:- 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:20-SOIC（0.295"，7.50mm 宽） 供应商设备封装:20-SOIC W 包装:管件 |
| ISL54056 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Ultra Low ON-Resistance, +1.65V to +4.5V, Single Supply, Quad SPDT (Dual DPDT) Analog Switch |
| ISL54056_07 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Ultra Low ON-Resistance, +1.65V to +4.5V, Single Supply, Quad SPDT (Dual DPDT) Analog Switch |
| ISL54056IRUZ-T | 功能描述:IC SWITCH QUAD SPDT 16UTQFN RoHS:是 类别:集成电路 (IC) >> 接口 - 模拟开关，多路复用器，多路分解器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:36 系列:- 功能:多路复用器 电路:2 x 4:1 导通状态电阻:75 欧姆 电压电源:单/双电源 电压 - 电源，单路/双路(±):2 V ~ 12 V，±2 V ~ 6 V 电流 - 电源:- 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:20-SOIC（0.295"，7.50mm 宽） 供应商设备封装:20-SOIC W 包装:管件 |
| ISL54057 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Ultra Low ON-Resistance, Low-Voltage, Single Supply, Differential 4 to 1 Analog Multiplexer |
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