LTC1314/LTC1315
PCMCIA Switching Matrix
with Built-In N-Channel
V
CC
Switch Drivers
FEATURES
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DESCRIPTIO
Output Current Capability: 120mA
External 12V Regulator Can Be Shut Down
Built-In N-Channel V
CC
Switch Drivers
Digital Selection of 0V, V
CCIN
, VPP
IN
or Hi-Z
3.3V or 5V V
CC
Supply
Break-Before-Make Switching
0.1µA Quiescent Current in Hi-Z or 0V Mode
No VPP
OUT
Overshoot
Logic Compatible with Standard PCMCIA Controllers
The LTC
®
1314/LTC1315 provide the power switching
necessary to control Personal Computer Memory Card
International Association (PCMCIA) Release 2.0 card slots.
When used in conjunction with a PC card interface control-
ler, these devices form a complete minimum component
count interface for palmtop, pen-based and notebook
computers.
The LTC1314/LTC1315 provide 0V, 3.3V, 5V, 12V and
Hi-Z power output for flash VPP programming. A built-in
charge pump produces 12V of gate drive for inexpensive
N-channel 3.3V/5V V
CC
switching. The 12V regulator can
be shut down when 12V is not required at VPP
OUT
. All
digital inputs are TTL compatible and interface directly
with industry standard PC card interface controllers.
The LTC1314 is available in 14-pin SO and the LTC1315 in
24-pin SSOP.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATI
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Notebook Computers
Palmtop Computers
Pen-Based Computers
Handi-Terminals
Bar-Code Readers
TYPICAL APPLICATION
DEVICE
Linear Technology PCMCIA Product Family
DESCRIPTION
SINGLE PCMCIA VPP DRIVER/REGULATOR
DUAL PCMCIA VPP DRIVER/REGULATOR
DUAL PCMCIA SWITCH MATRIX
PROTECTED V
CC
5V/3.3V SWITCH MATRIX
PROTECTED V
CC
AND VPP SWITCH MATRIX
PACKAGE
8-PIN SO
16-PIN SO*
14-PIN SO
24-PIN SSOP
8-PIN SO
16-PIN SO*
Typical PCMCIA Single Slot Driver
3.3V OR 5V
12V
STEP-UP
REGULATOR
LT
®
1301
V
OUT
SHDN
V
IN
C
OUT
5V
VPP
IN
V
DD
SHDN
VPP
OUT
LTC1314
DRV5
V
CCIN
DRV3
GND
VPP1
VPP2
PCMCIA
CARD SLOT
LT1312
LT1313
LTC1315
LTC1470
LTC1472
LTC
®
1314 SINGLE PCMCIA SWITCH MATRIX
+
*NARROW BODY
PCMCIA
CARD SLOT
CONTROLLER
5V
0.1µF
LTC1314 Truth Table
EN0
0
0
EN1
0
1
0
1
X
X
X
X
V
CC0
X
X
X
X
1
0
0
1
V
CC1
X
X
X
X
0
1
0
1
VPP
OUT
GND
V
CCIN
VPP
IN
Hi-Z
X
X
X
X
DRV3
X
X
X
X
1
0
0
0
DRV5
X
X
X
X
0
1
0
0
EN0
EN1
V
CC0
V
CC1
+
1µF
V
CC
LTC1314 • TA01
1
1
X
X
3.3V
X
X
X = DON’T CARE
U
U
UO
1
LINER [ LINEAR TECHNOLOGY ]
