LTC1314/LTC1315
PCMCIA Switching Matrix
with Built-In N-Channel
VCC Switch Drivers
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DESCRIPTIO
FEATURES
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Output Current Capability: 120mA
External 12V Regulator Can Be Shut Down
Built-In N-Channel VCC Switch Drivers
Digital Selection of 0V, VCCIN, VPPIN or Hi-Z
3.3V or 5V VCC Supply
Break-Before-Make Switching
0.1µA Quiescent Current in Hi-Z or 0V Mode
No VPPOUT Overshoot
Logic Compatible with Standard PCMCIA Controllers
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APPLICATI
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Notebook Computers
Palmtop Computers
Pen-Based Computers
Handi-Terminals
Bar-Code Readers
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 controller, 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 VCC switching. The 12V regulator can
be shut down when 12V is not required at VPPOUT. 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.
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TYPICAL APPLICATION
Linear Technology PCMCIA Product Family
DEVICE
+
PCMCIA
CARD SLOT
CONTROLLER
SHDN
VPPOUT
LTC1314
EN0
EN1
VCCIN
VCC1
DRV3
0.1µF
VPP1
VPP2
PCMCIA
CARD SLOT
DUAL PCMCIA SWITCH MATRIX
24-PIN SSOP
PROTECTED VCC 5V/3.3V SWITCH MATRIX
8-PIN SO
LTC1472
DRV5
VCC0
5V
16-PIN SO*
14-PIN SO
LTC1470
VPPIN
VDD
DUAL PCMCIA VPP DRIVER/REGULATOR
LTC1315
COUT
5V
8-PIN SO
LTC®1314 SINGLE PCMCIA SWITCH MATRIX
VIN
12V
SINGLE PCMCIA VPP DRIVER/REGULATOR
LT1313
STEP-UP
REGULATOR
LT®1301
VOUT SHDN
3.3V OR 5V
PACKAGE
LT1312
Typical PCMCIA Single Slot Driver
DESCRIPTION
PROTECTED VCC AND VPP SWITCH MATRIX
16-PIN SO*
*NARROW BODY
LTC1314 Truth Table
3.3V
VPPOUT
DRV3
X
GND
X
X
0
LTC1314 • TA01
VCC1
X
1
X
X
VCCIN
X
X
1
0
X
X
VPPIN
X
X
1
X
X
Hi-Z
X
X
X
1
0
X
1
0
X
GND
VCC0
0
X
1µF
EN1
1
+
EN0
0
VCC
DRV5
X
0
1
X
0
1
X
X
0
0
X
0
0
X
X
1
1
X
0
0
X = DON’T CARE
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