1
LTC1314/LTC1315
PCMCIA Switching Matrix
with Built-In N-Channel
V
CC
Switch Drivers
S
F
EA
T
U
RE
D
U
ESCRIPTIO
■
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.
■
Notebook Computers
■
Palmtop Computers
■
Pen-Based Computers
■
Handi-Terminals
■
Bar-Code Readers
U
S
A
O
PP
L
IC
AT
I
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATION
U
Linear Technology PCMCIA Product Family
DEVICE DESCRIPTION PACKAGE
LT1312 SINGLE PCMCIA VPP DRIVER/REGULATOR 8-PIN SO
LT1313 DUAL PCMCIA VPP DRIVER/REGULATOR 16-PIN SO*
LTC
®
1314 SINGLE PCMCIA SWITCH MATRIX 14-PIN SO
LTC1315 DUAL PCMCIA SWITCH MATRIX 24-PIN SSOP
LTC1470 PROTECTED V
CC
5V/3.3V SWITCH MATRIX 8-PIN SO
LTC1472 PROTECTED V
CC
AND VPP SWITCH MATRIX 16-PIN SO*
*NARROW BODY
EN0 EN1 V
CC0
V
CC1
VPP
OUT
DRV3 DRV5
0 0 X X GND X X
01 X XV
CCIN
XX
1 0 X X VPP
IN
XX
1 1 X X Hi-Z X X
XX 1 0 X 10
XX 0 1 X 01
XX 0 0 X 00
XX 1 1 X 00
X = DON’T CARE
LTC1314 Truth Table
Typical PCMCIA Single Slot Driver
+
VPP
IN
C
OUT
SHDN
3.3V OR 5V
V
DD
VPP
OUT
VPP1
VPP2
V
CC
LTC1314 • TA01
LTC1314
5V
12V
PCMCIA
CARD SLOT
CONTROLLER
EN0
EN1
V
CC0
V
CC1
DRV5
V
CCIN
DRV3
GND
5V
3.3V
PCMCIA
CARD SLOT
+
1µF
0.1µF
STEP-UP
REGULATOR
LT
®
1301
V
IN
V
OUT
SHDN