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Last update: 4 January 2004

IC number:BT458
IC function:256 Color Palette RAMDAC
Related components:BT438 (clock generaror), MS176, SAB82C171, ADV476 (RAMDACs), ADV101, VP101, ADV7120, STV8438 (video DACs)

Component documentation
IC numberManufacturerDocumentation
BT458Brooktree (now Conexant)Not available

Component versions
IC numberPackageCBM part numberCBM part description
BT458LPJ84-pin PLCC390860-01BT458LPJ110 RAMDAC (PLCC PKG)

Positions
DevicePositionPackage
A2410U911PLCC

Pinout
PinTypeNameSignal name
A2410
1InputP0AS1(0)
2..6InputOL1E..OL1AGND, S4(9)..S1(9)
7..11InputOL0E..OL0AGND, S4(8)..S1(8)
12..19I/OD[0]..D[7]DATA(0)..DATA(7)
20InputCE*BTCE*
21..22PowerGNDGND
23PowerVAAVAA
24..25InputC0..C1ADDR(0)..ADDR(1)
26InputR/WADDR(2)
27PowerVAAVAA
28OutputIORR
29OutputIOGG
30OutputIOBB
31AnalogFSAJUSTGND via R911
32AnalogCOMPVAA via C911
33PowerVREFConnected to VREF of BT438
34PowerGNDGND
35PowerVAAVAA
36PowerGNDGND
37PowerVAAVAA
38..42InputP7E..P7AGND, S4(7)..S1(7)
43..47InputP6E..P6AGND, S4(6)..S1(6)
48..52InputP5E..P5AGND, S4(5)..S1(5)
53..57InputP4E..P4AGND, S4(4)..S1(4)
58InputSYNC*Connected to pin 8 of U114
59InputBLANK*D_BLANK*
60InputLD*Connected to LDA of BT438 via E923
61InputCLOCKConnected to CLK of BT438
62InputCLOCK*Connected to CLK* of BT438
63..64PowerVAAVAA
65PowerGNDGND
66..70InputP3E..P3AGND, S4(3)..S1(3)
71..75InputP2E..P2AGND, S4(2)..S1(2)
76..80InputP1E..P1AGND, S4(1)..S1(1)
81..84InputP0E..P0BGND, S4(0)..S2(1)

Copyright © 2003-2004 Ronald van Dijk - All rights reserved