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74ABT3284 데이터시트(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
부품명 74ABT3284
상세설명  18-Bit Synchronous Datapath Multiplexer
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TLF11582
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 21 or 41 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 21 or 9-bit 41 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
Package Number
Package Description
74ABT3284VJG
VJG100A
100-Lead (14mm x 14mm) Molded Plastic Quad Flatpak JEDEC
Connection Diagram
TLF11582 – 1
Pin Assignment
Pin
Pin
Pin
Pin
1
Mode
SO
26
VCC
51
CP
IN
76
VCC
2CP
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
6SA2X1
31
A5
56
YSEL
81
D5
7SA2X0
32
A4
57
OEY
82
D4
8X0
33
A3
58
Y8
83
D3
9X1
34
A2
59
Y7
84
D2
10
GND
35
GND
60
GND
85
GND
11
X2
36
A1
61
Y6
86
D1
12
X3
37
A0
62
Y5
87
D0
13
X4
38
VCC
63
Y4
88
VCC
14
X5
39
B0
64
Y3
89
C0
15
X6
40
B1
65
Y2
90
C1
16
GND
41
GND
66
GND
91
GND
17
X7
42
B2
67
Y1
92
C2
18
X8
43
B3
68
Y0
93
C3
19
OEX
44
B4
69
LDDO
94
C4
20
XSEL0
45
B5
70
LDDI
95
C5
21
XSEL1
46
GND
71
ASEL1
96
GND
22
LDAO
47
B6
72
ASEL0
97
C6
23
LDAI
48
B7
73
OED
98
C7
24
OEA
49
B8
74
CP
XA
99
C8
25
VCC
50
VCC
75
Mode
SC
100
VCC
TRI-STATE
is a registered trademark of National Semiconductor Corporation
C1995 National Semiconductor Corporation
RRD-B30M125Printed in U S A


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