FSTU162450 View Datasheet(PDF) - Fairchild Semiconductor
Part Name
Description
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FSTU162450
Fairchild Semiconductor
FSTU162450 Datasheet PDF : 10 Pages
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Preliminary
Functional Description
The device can also be configured as an 8 and 16-bit device by grounding the unused pins in the 10-bit and 20-bit configu-
rations respectively. The 8-bit configuration may also be achieved by connecting two of the 4-bit enables from the 4-bit con-
figuration together and connecting the remaining enable pin (OE) HIGH.
Truth Tables
(see Functional Description)
20-Bit Configuration (S0 = S1 = L)
Inputs
OE1
OE2
OE3
OE4
OE5
L
X
X
X
X
H
X
X
X
X
Inputs/Outputs
1A1-10 = 1B1-10, 2A1-10 = 2B1-10
Z
10-Bit Configuration (S0 = L, S1 = H)
Inputs
OE1
OE2
OE3
OE4
OE5
L
X
X
L
X
L
X
X
H
X
H
X
X
L
X
H
X
X
H
X
Inputs/Outputs
1A1-10 = 1B1-10
1AX = 1BX
1AX = 1BX
Z
Z
2A1-10 = 2B1-10
2AX = 2BX
Z
2AX = 2BX
Z
5-Bit Configuration (S0 = H, S1 = L)
Inputs
OE1 OE2 OE3 OE4 OE5
L
L
L
L
X
L
L
L
H
X
L
L
H
L
X
L
L
H
H
X
L
H
L
L
X
L
H
L
H
X
L
H
H
L
X
L
H
H
H
X
H
L
L
L
X
H
L
L
H
X
H
L
H
L
X
H
L
H
H
X
H
H
L
L
X
H
H
L
H
X
H
H
H
L
X
H
H
H
H
X
1A1-5, 1B1-5
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
1Ax = 1Bx
Z
Z
Z
Z
Z
Z
Z
Z
Inputs/Outputs
1A6-10, 1B6-10
1Ay = 1By
1Ay = 1By
1Ay = 1By
1Ay = 1By
Z
Z
Z
Z
1Ay = 1By
1Ay = 1By
1Ay = 1By
1Ay = 1By
Z
Z
Z
Z
2A1-5, 2B1-5
2Ax = 2Bx
2Ax = 2Bx
Z
Z
2Ax = 2Bx
2Ax = 2Bx
Z
Z
2Ax = 2Bx
2Ax = 2Bx
Z
Z
2Ax = 2Bx
2Ax = 2Bx
Z
Z
2A5-10, 2B5-10
2Ay = 2By
Z
2Ay = 2By
Z
2Ay = 2By
Z
2Ay = 2By
Z
2Ay = 2By
Z
2Ay = 2By
Z
2Ay = 2By
Z
2Ay = 2By
Z
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