74ABT3284 Datasheet, PDF (1/12 Pages) National Semiconductor (TI) – 18-Bit Synchronous Datapath Multiplexer

October 1995
74ABT3284
18-Bit Synchronous Datapath Multiplexer
General Description
The 74ABT3284 is a synchronous datapath buffer designed
to transmit four 9-bit bytes of data onto one or two 9-bit
bytes in 2 1 or 4 1 multiplexed configurations In addition
the non-inverting transceiver supports bidirectional data
transfer in transparent or registered modes A data byte
from any one of the six ports can be stored during transpar-
ent operation for later recall Data input to any port may also
be read back to itself for byte manipulation or system self-di-
agnostic purposes
The 74ABT3284 is useful for interleaving data in memory
applications or for use in bus-to-bus communications where
variations in data word length or construction are required
Features
Y _{Advanced BiCMOS technology provides high speed at}
low power consumption
Y _{18-bit 2 1 or 9-bit 4 1 multiplexed modes}
Y _{Registered or transparent datapath operation}
Y _{Output enables and select lines have the option of be-}
ing synchronized for pipelined operation
Y _{Independent input output register and control synchro-}
nizing clocks insure maximum timing flexibility
Y _{Independent control signals insure functional flexibility}
Y _{Guaranteed simultaneous switching noise level and}
dynamic threshold performance
Y _{Guaranteed latchup protection}
Y _{High impedance glitch free bus loading during entire}
power up and power down cycle
Y _{Non-destructive hot insertion capability}
Commercial
74ABT3284VJG
Package Number
VJG100A
Package Description
100-Lead (14mm x 14mm) Molded Plastic Quad Flatpak JEDEC
Connection Diagram Pin Assignment
Pin
Pin
Pin
Pin
TL F 11582–1
1
Mode SO 26
V_CC
51
CP IN
76
V_CC
2 CP AX
27 A₈
52 OEB
77
D₈
3 OEC
28 A₇
53 LDBI
78
D₇
4 LDCI
29 A₆
54 LDBO
79
D₆
5 LDCO
30 GND 55 Mode W 80 GND
6
SA₂X₁
7
SA₂X₀
8
X₀
9
X₁
10 GND
31 A₅
56 YSEL
32 A₄
57 OEY
33 A₃
58 Y₈
34 A₂
59 Y₇
35 GND 60 GND
81
D₅
82
D₄
83
D₃
84
D₂
85 GND
11 X₂
12 X₃
13 X₄
14 X₅
15 X₆
16 GND
36 A₁
61 Y₆
37 A₀
62 Y₅
38
V_CC
63
Y₄
39 B₀
64 Y₃
40 B₁
65 Y₂
41 GND 66 GND
86
D₁
87
D₀
88
V_CC
89
C₀
90
C₁
91 GND
17 X₇
18 X₈
19 OEX
20 XSEL₀
21 XSEL₁
22 LDAO
23 LDAI
24 OEA
25
V_CC
42 B₂
67 Y₁
43 B₃
68 Y₀
44 B₄
69 LDDO
45 B₅
70 LDDI
46 GND 71 ASEL1
92
C₂
93
C₃
94
C₄
95
C₅
96 GND
47 B₆
72 ASEL0
97
C₆
48 B₇
73 OED
98
C₇
49 B₈
74 CP XA
99
C₈
50 V_CC 75 Mode SC 100 V_CC
TRI-STATE is a registered trademark of National Semiconductor Corporation
C1995 National Semiconductor Corporation TL F 11582
RRD-B30M125 Printed in U S A