MIC2560-0YWM TR Micrel Inc, MIC2560-0YWM TR Datasheet - Page 6

• Manufacturer Part Number: MIC2560-0YWM TR
• Description: IC PCMCIA CARD SW MATRIX 16-SOIC
• Manufacturer: Micrel Inc
• Type: PCMCIA/Cardbus Switchr

Specifications of MIC2560-0YWM TR

• Number Of Outputs: 2
• Rds (on): 1 Ohm
• Internal Switch(s): Yes
• Current Limit: 200mA
• Voltage - Input: 3.3V, 5V, 12V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (0.300", 7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: MIC2560-0YWMTR; MIC2560-0YWMTR

Application Information
PCMCIA V
using the MIC2560 voltage selector/switch IC. Four
control bits determine V
standby/operate mode condition. V
of V
available. When the V
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
example) by locking out the low voltage switch until
V
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
V
+12V is not available, the MIC2560 automatically
switches into “suspend” mode, where V
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
inputs with filter capacitors to improve output ripple. As
all internal device logic and voltage/current comparison
functions are powered from the V
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
V
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
pins.
PCMCIA Implementation
The MIC2560 is designed for compatibility with the
Personal
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
supply pins per PCMCIA slot. V
programming Flash (EEPROM) memory cards. The two
V
voltages. Fully implementing PCMCIA specifications
requires a MIC2560, a MIC2557 PCMCIA V
Micrel, Inc.
September 2006
PP OUT
CC3
PP IN
PP OUT
PP
CC
supply pins may be programmed to different
and internal MOSFET drive is obtained from the
(3.3V or 5V), V
pin (usually +12V) during normal operation. If
pins may have 0.01µF to 0.1µF capacitors for
drops below V
PP OUT
CC
Computer
and V
to the V
PP
PP
CC
CC
, or a high impedance state are
CC OUT
control is easily accomplished
Memory
CC
. The V
high impedance condition is
inputs (from 12V to 5V, for
and V
CC3 IN
PP
CC3 IN
CC
PP OUT
is primarily used for
Card
, V
CC3 IN
PP OUT
, V
output is similarly
CC5 IN
CC5 IN
output voltages
CC OUT
International
PP
line, supply
voltage and
, and V
CC OUT
, and V
Switching
can be
PP IN
and
PP IN
PP
6
Matrix, and a controller. Figure 3 shows this full config-
uration, supporting both 5.0V and 3.3V V
However, many cost sensitive designs (especially
notebook/palmtop computers) connect V
the MIC2557is not required. This circuit is shown in
Figure 4.
When a memory card is initially inserted, it should
receive V
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
Figure 3. MIC2560 Typical PCMCIA Memory Card
Figure 4. MIC2560 Typical PCMCIA Memory Card
Note that V
Application with Dual V
Application with Dual V
CC
— either 3.3V ± 0.3V or 5.0V ±5%. The
and separate V
PP1
and V
PP2
PP1
are Driven Together.
CC
CC
and V
(5.0V or 3.3V).
(5.0V or 3.3V)
PP2
CC
.
CC
PP1
M9999-092106
. If the card is
operation.
to V
MIC2560
PP2
and