74VCX32500(2001) データシートの表示（PDF） - Fairchild Semiconductor
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74VCX32500
(Rev.:2001)
(Rev.:2001)
Fairchild Semiconductor
74VCX32500 Datasheet PDF : 8 Pages
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Connection Diagram
(Top Thru View)
Pin Descriptions
Pin Names
Description
OEABn
Output Enable Input for A to B Direction
(Active HIGH)
OEBAn
Output Enable Input for B to A Direction
(Active LOW)
LEABn, LEBAn Latch Enable Inputs
CLKABn,
CLKBAn
Clock Inputs
1A1–1A18
2A1–2A18
Side A Inputs or 3-STATE Outputs
1B1–1B18
2B1–2B18
Side B Inputs or 3-STATE Outputs
FBGA Pin Assignments
1
2
3
4
5
6
A 1A2 1A1 LEAB1 CLKAB1 1B1
B 1A4 1A3 OEAB1 GND
1B3
C 1A6 1A5 GND GND
1B5
D 1A8 1A7 VCC
VCC
1B7
E 1A10 1A9 GND GND
1B9
F 1A12 1A11 GND GND
1B11
G 1A14 1A13 VCC
VCC
1B13
H 1A15 1A16 GND GND
1B16
1B2
1B4
1B6
1B8
1B10
1B12
1B14
1B15
J 1A17 1A18 OEBA1 CLKBA1 1B18 1B17
K NC LEAB2 LEBA1 GND CLKAB2 NC
L 2A2 2A1 OEAB2 GND
2B1
2B2
M 2A4 2A3 GND GND
2B3
2B4
N 2A6 2A5 VCC
VCC
2B5
2B6
P 2A8 2A7 GND GND
2B7
2B8
R 2A10 2A9 GND GND
2B9
2B10
T 2A12 2A11 VCC
VCC
2B11 2B12
U 2A14 2A13 GND GND
2B13 2B14
V 2A15 2A16 OEBA2 CLKBA2 2B16
W 2A17 2A18 LEBA2 GND
2B18
2B15
2B17
Function Table (Note 3)
Inputs
Outputs
OEABn LEABn CLKABn An
Bn
L
X
X
X
Z
H
H
X
L
L
H
H
X
H
H
H
L
↓
L
L
H
L
↓
H
H
H
L
H
X
B0 (Note 4)
H
L
L
X
B0 (Note 5)
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial (HIGH or LOW, inputs may not float)
Z = High Impedance
Note 3: A-to-B data flow is shown; B-to-A flow is similar but uses OEBA,
LEBA and CLKBA. OEBA is active LOW.
Note 4: Output level before the indicated steady-state input conditions
were established.
Note 5: Output level before the indicated steady-state input conditions
were established, provided that CLKAB was LOW before LEAB went LOW.
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