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UPC2925T-W (IC902) : Regulator
1. Pin layout
4
1
2
3
3. Block diagram
TC74VHC244FT-X (IC906) : Buffer
1G
1
2
1A1
3
2Y4
4
1A2
5
2Y3
1A3
6
2Y2
7
1A4
8
9
2Y1
GND
10
2. Pin function
Pin No.
1
2
3
4
Error
amp.
INPUTS
Vcc
20
G
19
2G
L
18
1Y1
L
17
2A4
H
16
1Y2
15
2A3
1Y3
14
13
2A2
12
1Y4
2A1
11
Function
Input
Gnd
Output
Gnd (Fin)
Safe operation
area protection
Over current
protection
OUTPUTS
An
Yn
Yn
L
L
H
H
H
L
X
Z
Z
X
: Don't Care
Z
: High Impedance
Yn
: TC74VHC244
Yn
: TC74VHC240
NX-HD10
INPUT
OUTPUT
GND
1-43
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