lm9831 National Semiconductor Corporation, lm9831 Datasheet - Page 9

• Manufacturer Part Number: lm9831
• Description: 42-bit Color, 1200dpi Usb Image Scanner
• Manufacturer: National Semiconductor Corporation

RESET
TEST
CMODE
V
AGND (2)
V
V
DGND (9)
A
D
DRAM
(2)
(5)
Digital Power Supplies (17 pins)
Analog Power Supplies (4 pins)
(3)
Digital input. Take high to force device into
Power On Reset state, low to exit reset state.
Analog Output.
Digital Input. Test mode, always tie high.
This is the positive supply pin for the analog
supply. It should be connected to a voltage
source of +5V and bypassed to AGND with a
0.1µF monolithic capacitor in parallel with a
10µF tantalum capacitor.
This is the ground return for the analog sup-
ply.
This is the positive supply pin for the digital
supply. It should be connected to a voltage
source of +5V and bypassed to DGND with a
0.1µF monolithic capacitor.
This is the positive supply pin for the digital
supply for the LM9831’s external DRAM I/O. It
also powers the A, B, A, and B stepper motor
outputs. It should be connected to a 3 or 5V
supply and bypassed to the closest DGND pin
with a 0.1µF monolithic capacitor.
This is the ground return for V
Miscellaneous
D
and V
DRAM
.
9
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