参数资料
| 型号： | MIC2560-1BWM TR |
| 厂商： | Micrel Inc |
| 文件页数： | 6/8页 |
| 文件大小： | 0K |
| 描述： | IC PCMCIA CARD SW MATRIX 16-SOIC |
| 标准包装： | 1,000 |
| 类型： | PCMCIA/Cardbus 开关 |
| 输出数： | 2 |
| Rds（开）： | 1 欧姆 |
| 内部开关： | 是 |
| 电流限制： | 200mA |
| 输入电压： | 3.3V，5V，12V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 16-SOIC |
| 包装： | 带卷 (TR) |
| 其它名称： | MIC2560-1BWMTR MIC2560-1BWMTR-ND |
Micrel, Inc.
Application Information
PCMCIA V CC and V PP control is easily accomplished
using the MIC2560 voltage selector/switch IC. Four
control bits determine V CC OUT and V PP OUT voltage and
standby/operate mode condition. V PP OUT output voltages
of V CC (3.3V or 5V), V PP , or a high impedance state are
available. When the V CC high impedance condition is
selected, the device switches into “sleep” mode and
draws only nano-amperes of leakage current. An error
flag falls low if the output is improper, because of
overtemperature or overcurrent faults. Full protection
from hot switching is provided which prevents feedback
from the V PP OUT to the V CC inputs (from 12V to 5V, for
example) by locking out the low voltage switch until
V PP OUT drops below V CC . The V CC output is similarly
protected against 5V to 3.3V shoot through.
The MIC2560 is a low-resistance power MOSFET
switching matrix that operates from the computer system
main power supply. Device logic power is obtained from
V CC3 and internal MOSFET drive is obtained from the
V PP IN pin (usually +12V) during normal operation. If
+12V is not available, the MIC2560 automatically
switches into “suspend” mode, where V CC OUT can be
switched to 3.3V, but at higher switch resistance.
Internal break-before-make switches determine the
output voltage and device mode.
Supply Bypassing
External capacitors are not required for operation. The
MIC2560 is a switch and has no stability problems. For
best results however, bypass V CC3 IN , V CC5 IN , and V PP IN
inputs with filter capacitors to improve output ripple. As
all internal device logic and voltage/current comparison
functions are powered from the V CC3 IN line, supply
bypass of this line is the most critical, and may be
necessary in some cases. In the most stubborn layouts,
up to 0.47μF may be necessary. Both V CC OUT and
V PP OUT pins may have 0.01μF to 0.1μF capacitors for
noise reduction and electrostatic discharge (ESD)
damage prevention. Larger values of output capacitor
might create current spikes during transitions, requiring
larger bypass capacitors on the V CC3 IN , V CC5 IN , and V PP IN
pins.
PCMCIA Implementation
The MIC2560 is designed for compatibility with the
Personal Computer Memory Card International
Association’s (PCMCIA) Specification, revision 2.1 as
well as the PC Card Specification, (March 1995),
including the CardBus option.
The Personal Computer Memory Card International
Association (PCMCIA) specification requires two V PP
supply pins per PCMCIA slot. V PP is primarily used for
programming Flash (EEPROM) memory cards. The two
V PP supply pins may be programmed to different
voltages. Fully implementing PCMCIA specifications
requires a MIC2560, a MIC2557 PCMCIA V PP Switching
MIC2560
Matrix, and a controller. Figure 3 shows this full config-
uration, supporting both 5.0V and 3.3V V CC operation.
Figure 3. MIC2560 Typical PCMCIA Memory Card
Application with Dual V CC (5.0V or 3.3V)
and separate V PP1 and V PP2 .
Figure 4. MIC2560 Typical PCMCIA Memory Card
Application with Dual V CC (5.0V or 3.3V).
Note that V PP1 and V PP2 are Driven Together.
However, many cost sensitive designs (especially
notebook/palmtop computers) connect V PP1 to V PP2 and
the MIC2557is not required. This circuit is shown in
Figure 4.
When a memory card is initially inserted, it should
receive V CC — either 3.3V ± 0.3V or 5.0V ±5%. The
initial voltage is determined by a combination of
mechanical socket “keys” and voltage sense pins. The
card sends a handshaking data stream to the controller,
which then determines whether or not this card requires
V PP and if the card is designed for dual V CC . If the card is
September 2006
6
M9999-092106
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC2560-1YWM | 功能描述:电源开关 IC - 配电 PCMCIA Card Sw. Matrix - Lead Free RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
| MIC2560-1YWM TR | 功能描述:电源开关 IC - 配电 PCMCIA Card Sw. Matrix - Lead Free RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
| MIC2561-0BM | 功能描述:IC PCMCIA CARD SW MATRIX 14-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 电源分配开关 系列:- 特色产品:XRP252 Switches 标准包装:1 系列:- 类型:高端开关 输出数:2 Rds（开）:140 毫欧 内部开关:是 电流限制:1.15A 输入电压:1.75 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-TDFN（3x3） 包装:Digi-Reel® 其它名称:1016-1691-6 |
| MIC2561-0BM TR | 功能描述:IC PCMCIA CARD SW MATRIX 14-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 电源分配开关 系列:- 特色产品:XRP252 Switches 标准包装:1 系列:- 类型:高端开关 输出数:2 Rds（开）:140 毫欧 内部开关:是 电流限制:1.15A 输入电压:1.75 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-TDFN（3x3） 包装:Digi-Reel® 其它名称:1016-1691-6 |
| MIC2561-0YM | 功能描述:电源开关 IC - 配电 PCMCIA Card Sw. Matrix - Lead Free RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
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