MB3807A Datasheet, PDF (3/15 Pages) Fujitsu Component Limited. – Power Management Switching IC (with flash memory power switching function)

MB3807A
s PIN DESCRIPTION
Pin No.
1
9
2
7
4
5
3
6
13, 14
11, 12
15
10
16
8
Pin name
EN1A
EN1B
EN0A
EN0B
SWIN1A
SWIN1B
SWIN2A
SWIN2B
SWOUTA
SWOUTB
DLYA
DLYB
VCC
GND
Function
These pins turn the corresponding switches on and off depending on the PCMCIA
compatible signals, as shown in “LOGICAL OPERATION TABLE.”
These pins connect the 12-V power supply for writing data to flash memory. When
the SW1 is turned on, the voltage at the SWIN1 pin is output to the SWOUT pin.
These pins also serve as power supply pins for the charge pump on the SW1 side.
For switching, the pins require a voltage higher than VCC.
These pins connect the 3.3/5.0-V power supply for reading data from flash memory.
When the SW2 is on, the voltage at the SWIN2 pin is output to the SWOUT pin.
These pins also serve as power supply pins for the charge pump on the SW2 side.
For switching, the pins require a voltage higher than VCC.
These pins are output pins of the switch. A pair of two pins are used commonly as
either SWOUTA or SWOUTB pins.
These pins are connected to the VPP pin of the flash memory.
These pins control the switch ON time.
The ON time is controllable using an external capacitor.
Leave these pins open when not in use. Note that a voltage of about 25 V is gener-
ated when the pins are open. Since high impedance is required, be careful when
mounting the device not to generate current leakage.
Power supply pin
Ground pin
3