19-0125; Rev. 1; 8/93
Dual-Slot PCMCIA Analog Power Controller
_______________General Description
The MAX780A provides the power switching and status
signals necessary to control two Personal Computer
Memory Card International Association (PCMCIA)
Release 2.0 card slots. The MAX780A, used in conjunc-
tion with a PC Card Interface Digital Controller, forms a
complete, minimum component count PCMCIA interface
for palmtop and notebook computers.
The MAX780A incorporates two 0V/+5V/+12V/high-
impedance power outputs for flash V
PP
programming,
level shifters for power MOSFET control of two sepa-
rate +3.3V/+5V supplies, and two V
PP
power-ready
status signals. The MAX780A may be directly con-
nected to the control outputs from a PCMCIA digital
controller, or may be configured to use internal edge-
triggered registers for connection to the CPU data bus.
The MAX780B has all the features of the MAX780A but
omits the reference and V
PP
valid indicators. The
MAX780C has all the features of the MAX780A but
omits the registers for the digital inputs. The MAX780D
omits the reference, the V
PP
valid indicators, and the
digital input registers.
___________________________Features
o
SSOP Circuit Fits in 0.09in2
o
Smallest Complete Analog Controller for Two
PCMCIA (Release 2.0/JEIDA 4.1) PC Card Sockets
o
Dual V
CC
Contols and V
PP
Outputs
o
Logic-Compatible with Industry-Standard
PCMCIA Digital Controllers:
Intel 82365SL_DF
Fujitsu MB86301
Chips and Technology F8680
Cirrus Logic CL-PD6720
o
0V/+5V/+12V/High-Impedance V
PP
Outputs
o
Internal 1.6Ω V
PP
Power Switches
o
Dual Voltage 3.3V/5V V
CC
Operation
o
V
PP
Power-Ready Status Signals
o
130µA Quiescent Supply Current
(3.5µA in Shutdown)
o
Break-Before-Make Switching
MAX780
______________Ordering Information
PART
TEMP. RANGE
MAX780ACNG
0°C to +70°C
MAX780ACAG
0°C to +70°C
MAX780AC/D
0°C to +70°C
MAX780AENG -40°C to +85°C
MAX780AEAG -40°C to +85°C
PIN-PACKAGE
24 Narrow Plastic DIP
24 SSOP
Dice*
24 Narrow Plastic DIP
24 SSOP
Part
Number
Reference &
V
PP
Status
Indicators
Registers for
Direct
Connection to
CPU Data Bus
Dual V
PP
Switches &
Level Shifters
for V
CC
Switching
MAX780A
MAX780B
MAX780C
MAX780D
Ordering Information continued on last page.
* Contact factory for dice specifications.
__________Typical Operating Circuit
+3.3V
+12V
VPPIN
+5V
VCCIN
ADRV3
+5V
ADRV5
BDRV3
SHDN
REF
C1
C2
WR
GND
DIGITAL
I/O
PCMCIA
DIGITAL
CONTROLLER
BDRV5
AVPP
BVPP
+5V
V
CC
PCMCIA SLOT
V
PP
#1
_______________________Applications
Notebook and Palmtop Computers
Personal Organizers
Digital Cameras
Handiterminals
Bar-Code Readers
MAX780A
V
CC
PCMCIA SLOT
V
PP
#2
________________________________________________________________ Maxim Integrated Products
1
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