FSTUD32211 Datasheet, PDF (3/8 Pages) Fairchild Semiconductor – 40/48-Bit Bus Switch with -2V Undershoot Protection and Level Shifting (Preliminary)

Connection Diagram
(Top Thru View)
Preliminary
Pin Descriptions
Pin Name
OE₁, OE₂, OE₃, OE₄
1A, 2A, 3A, 4A
1B, 2B, 3B, 4B
NC
Description
Bus Switch Enables
Bus A
Bus B
No Connect
FBGA Pin Assignments
(48-Bit Routing)
1
2
3
4
A
1A₂ 1A₁ NC
OE₂
B
1A₄ 1A₃ 1A₇
OE₁
C
1A₆ 1A₅ GND 1B₇
D
1A₁₀ 1A₉ 1A₈
1B₈
E
1A₁₂ 1A₁₁ 2A₁
2B₁
F
2A₄ 2A₃ 2A₂
2B₂
G
2A₆ 2A₅ V_CC GND
H 2A₈ 2A₇ GND GND
J
2A₁₀ 2A₉ 2A₁₁ 2B₁₁
K 2A₁₂ 3A₁₂ GND GND
L 3A₁₁ 3A₁₀ GND GND
M
3A₉ 3A₈ GND V_CC
N
3A₇ 3A₆ 3A₂
3B₂
P
3A₅ 3A₄ 3A₁
3B₁
R
3A₃ 4A₁₂ 4A₈
4B₈
T
4A₁₁ 4A₁₀ 4A₇
4B₇
U
4A₉ 4A₆ GND 4B₁
V
4A₅ 4A₄ 4A₁
OE₄
W
4A₃ 4A₂ OE₃
NC
Truth Tables
5
1B₁
1B₃
1B₅
1B₉
1B₁₁
2B₃
2B₅
2B₇
2B₉
3B₁₂
3B₁₀
3B₈
3B₆
3B₄
4B₁₂
4B₁₀
4B₆
4B₄
4B₂
6
1B₂
1B₄
1B₆
1B₁₀
1B₁₂
2B₄
2B₆
2B₈
2B₁₀
2B₁₂
3B₁₁
3B₉
3B₇
3B₅
3B₃
4B₁₁
4B₉
4B₅
4B₃
Inputs
OE₁
OE₂
L
L
L
H
H
L
H
H
Inputs
OE₃
OE₄
L
L
L
H
H
L
H
H
Inputs/Outputs
1A, 1B
2A, 2B
1A = 1B
1A = 1B
Z
Z
2A = 2B
Z
2A = 2B
Z
Inputs/Outputs
3A, 3B
3A = 3B
3A = 3B
Z
Z
4A, 4B
4A = 4B
Z
4A = 4B
Z
3
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