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PDF LTC1315 Data sheet ( Hoja de datos )
| Número de pieza | LTC1315 | |
| Descripción | PCMCIA Switching Matrix with Built-In N-Channel VCC Switch Drivers | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LTC1315 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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LTC1314/LTC1315
PCMCIA Switching Matrix
with Built-In N-Channel
VCC Switch Drivers
FEATURES
s Output Current Capability: 120mA
s External 12V Regulator Can Be Shut Down
s Built-In N-Channel VCC Switch Drivers
s Digital Selection of 0V, VCCIN, VPPIN or Hi-Z
s 3.3V or 5V VCC Supply
s Break-Before-Make Switching
s 0.1µA Quiescent Current in Hi-Z or 0V Mode
s No VPPOUT Overshoot
s Logic Compatible with Standard PCMCIA Controllers
APPLICATI S
s Notebook Computers
s Palmtop Computers
s Pen-Based Computers
s Handi-Terminals
s Bar-Code Readers
DESCRIPTIO
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 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.
TYPICAL APPLICATION
Typical PCMCIA Single Slot Driver
3.3V OR 5V
12V
+
VIN
STEP-UP
REGULATOR
LT®1301
VOUT SHDN
COUT
5V VPPIN
VDD SHDN
PCMCIA
CARD SLOT
CONTROLLER
VPPOUT
LTC1314
EN0
EN1 DRV5
VPP1
5V 0.1µF VPP2
PCMCIA
CARD SLOT
VCC0
VCCIN
VCC1
DRV3
GND
+
1µF
VCC
LTC1314 • TA01
3.3V
Linear Technology PCMCIA Product Family
DEVICE DESCRIPTION
LT1312 SINGLE PCMCIA VPP DRIVER/REGULATOR
LT1313 DUAL PCMCIA VPP DRIVER/REGULATOR
LTC®1314 SINGLE PCMCIA SWITCH MATRIX
LTC1315 DUAL PCMCIA SWITCH MATRIX
LTC1470 PROTECTED VCC 5V/3.3V SWITCH MATRIX
LTC1472 PROTECTED VCC AND VPP SWITCH MATRIX
*NARROW BODY
PACKAGE
8-PIN SO
16-PIN SO*
14-PIN SO
24-PIN SSOP
8-PIN SO
16-PIN SO*
LTC1314 Truth Table
EN0 EN1 VCC0 VCC1 VPPOUT DRV3 DRV5
0 0 X X GND X X
0 1 X X VCCIN X X
10
X
X
VPPIN
X
X
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
1
1 page  
LTC1314/LTC1315
PIN FUNCTIONS
LTC1315
VPPIN (Pins 1, 7): 12V Power Inputs.
SHDN (Pins 2, 8): Shutdown Outputs. When the output is
high, the external 12V regulator can be shut down to
conserve power consumption.
EN0, EN1 (Pins 3, 4, 9, 10): Logic inputs that control the
voltage output on VPPOUT. The input thresholds are
compatible with TTL/CMOS levels. Refer to the Truth
Table.
VCC0 (Pins 5, 11): Logic inputs that control the state of the
MOSFET gate driver DRV3. ESD protection device limits
input excursions to 0.6V below ground.
VCC1 (Pins 6, 12): Logic inputs that control the state of the
MOSFET gate driver DRV5. ESD protection device limits
input excursions to 0.6V below ground.
DRV5, DRV3 (Pins 13, 14, 19, 20): Gate driver outputs
that control the external MOSFETs that switch the VCC pin
of card slot to Hi-Z, 3.3V, or 5V.
VDD (Pins 15, 21): Positive Supplies, 4.5V ≤ VDD ≤ 5.5V.
These pins supply the power to the control logic and the
charge pumps and must be continuously powered.
GND (Pins 16, 22): Ground Connections.
VPPOUT (Pins 17, 23): Switched outputs that provide 0V,
3.3V, 5V, 12V, or Hi-Z to the VPP pin of the card slot. Refer
to the Truth Table.
VCCIN (Pins 18, 24): 5V or 3.3V Power Inputs.
BLOCK DIAGRAM
EN0
TTL TO CMOS
CONVERTER
EN1
TTL TO CMOS
CONVERTER
VPPIN
+
10V –
LTC1314 or 1/2 LTC1315
BREAK-BEFORE-
MAKE SWITCHES
SHDN
GATE CHARGE
AND DISCHARGE
CONTROL LOGIC
OSCILLATOR
AND BIAS
GATE CHARGE
AND DISCHARGE
CONTROL LOGIC
GATE CHARGE
CONTROL LOGIC
CHARGE
PUMP
CHARGE
PUMP
VPPIN
VCCIN
VPPOUT
VCC0
VCC1
TTL TO CMOS
CONVERTER
TTL TO CMOS
CONVERTER
GATE CHARGE
AND DISCHARGE
CONTROL LOGIC
OSCILLATOR AND
CHARGE PUMP
OUTPUT
SWITCHES
GND
DRV3
DRV5
LTC1314 • BD
5
5 Page 
TYPICAL APPLICATIONS N
Dual Slot Interfae to “365” Type Controller
A_VPP_EN0
A_VPP_EN1
B_VPP_EN0
B_VPP_EN1
“365” TYPE
CONTROLLER
A_VCC_EN0
A_VCC_EN1
B_VCC_EN0
B_VCC_EN1
5V 12V
VDD
AEN0
AEN1
BEN0
BEN1
VPPIN
AVPPOUT
ADRV5
AVCCIN
ADRV3
LTC1315
AVCC1
AVCC0
BVCC1
BVCC0
BVPPOUT
BDRV5
BVCCIN
BDRV3
GND
5V
1/2 Si9956DY
0.1µF
Si9956DY
+
1µF
3.3V
5V
1/2 Si9956DY
0.1µF
Si9956DY
+
1µF
NOTE: “365” TYPE CONTROLLERS
HAVE ACTIVE-HIGH VCC DRIVE
3.3V
LTC1314/LTC1315
VPP1
VPP2
PCMCIA
CARD SLOT
VCC #1
VPP1
VPP2
PCMCIA
CARD SLOT
VCC #2
LTC1315 • TA03
Typical PCMCIA Dual Slot Driver
3.3V OR 5V
12V
BVPPIN AVPPIN
5V
VDD
ASHDN
BSHDN
VDD AVPPOUT
AEN0
AEN1
ADRV5
+
COUT
5V
VIN STEP-UP
REGULATOR
LT1301
VOUT SHDN
0.1µF
AVCC0
AVCC1
AVCCIN
ADRV3
+
1µF
PCMCIA
CARD SLOT
CONTROLLER
LTC1315
BEN0
BEN1
BVPP OUT
BDRV5
3.3V
5V 0.1µF
BVCC0
BVCCIN
BVCC1
BDRV3
GND
+
1µF
VPP1
VPP2
PCMCIA
CARD SLOT
VCC #1
VPP1
VPP2
PCMCIA
CARD SLOT
VCC #2
LTC1315 • TA01
EN0 EN1
00
01
10
11
XX
XX
XX
XX
X = DON’T CARE
LTC1315 Truth Table
VCC0 VCC1 VPPOUT DRV3 DRV5
X X GND X X
X X VCCIN X X
X
X
VPPIN
X
X
X X Hi-Z X X
1 0 X 10
0 1 X 01
0 0 X 00
1 1 X 00
3.3V
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LTC1315.PDF ] | |
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