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BT481 Datasheet(PDF) 30 Page - List of Unclassifed Manufacturers

Part # BT481
Description  110 MHz 256-Word Color Palette 15-, 16-, and 24-Bit True Color Power-Down RAMDAC
PDF  52 Pages
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Manufacturer  ETC [List of Unclassifed Manufacturers]
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BT481 Datasheet(HTML) 30 Page - List of Unclassifed Manufacturers

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Bt481A
110 MHz 256-Word Color Palette 15-, 16-, and 24-Bit True Color Power-Down RAMDAC
Brooktree®
24
PC BOARD LAYOUT CONSIDERATIONS
L481A_C
Figure 9. Typical Connection Diagram and Parts List (External Voltage Reference)
Note: Each pair of device VAA and GND pins must be separately decoupled.
OPA
P
VAA
To Monitor
DAC
Output
GND
R3
R2
R1
RSET
GND
+5 V (VCC)
IOB
IOG
VAA
Bt481A
Analog Power Plane
C6
+
C1
Ground
P
P
P
To
Video
Connector
1N4148/9
1N4148/9
IOR
IREF
C4
C2–C3
L1 (optional)
VREF
COMP
R4
Z1
C5
Location
Description
Vendor Part Number
C1–C5
0.1
µF Ceramic Capacitor
Erie RPE112Z5U104M50V
C6
10
µF Capacitor
Mallory CSR13G106KM
L1
Ferrite Bead
Fair-Rite 2743021447
R1, R2, R3
75
Ω 1% Metal Film Resistor
Dale CMF-55C
R4
1 k
Ω 5% Resistor
RSET
1% Metal Film Resistor
Dale CMF-55C
Z1
1.2 V Voltage Reference
National Semiconductor LM385BZ-1.2
Note: The vendor numbers above are listed only as a guide. Substitution of devices with similar characteristics will not
affect the performance of the Bt481A.



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