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IDT74FCT138TDB Datasheet

  • IDT74FCT138TDB

  • FAST CMOS 1-OF-8 DECODER WITH ENABLE

  • 110.93KB

  • 6頁

  • IDT

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Integrated Device Technology, Inc.
FAST CMOS
1-OF-8 DECODER
WITH ENABLE
DESCRIPTION:
IDT54/74FCT138T/AT/CT
FEATURES:
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Std., A and C speed grades
Low input and output leakage
鈮?碌A(chǔ)
(max.)
CMOS power levels
True TTL input and output compatibility
鈥?V
OH
= 3.3V (typ.)
鈥?V
OL
= 0.3V (typ.)
High drive outputs (-15mA I
OH
, 48mA I
OL
)
Meets or exceeds JEDEC standard 18 specifications
Product available in Radiation Tolerant and Radiation
Enhanced versions
Military product compliant to MIL-STD-883, Class B
and DESC listed (dual marked)
Available in DIP, SOIC, QSOP, CERPACK and
LCC packages
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
The IDT54/74FCT138T/AT/CT are 1-of-8 decoders built
using an advanced dual metal CMOS technology. The IDT54/
74FCT138T/AT/CT accepts three binary weighted inputs (A
0
,
A
1
, A
2
) and, when enabled, provides eight mutually exclusive
active LOW outputs (
O
0
-
O
7
). The IDT54/74FCT138T/AT/CT
features three enable inputs, two active LOW (
E
1
,
E
2
) and one
active HIGH (E
3
). All outputs will be HIGH unless
E
1
and
E
2
are
LOW and E
3
is HIGH. This multiple enable function allows
easy parallel expansion of the device to a 1-of-32 (5 lines to
32 lines) decoder with just four IDT54/74FCT138T/AT/CT
devices and one inverter.
FUNCTIONAL BLOCK DIAGRAM
A
2
A
1
A
0
E
1
E
2
E
3
PIN CONFIGURATIONS
A
0
A
1
A
2
E
1
E
2
E
3
O
7
GND
1
2
3
4
5
6
7
8
P16-1
D16-1
SO16-1
SO16-7
&
E16-1
16
15
14
13
12
11
10
9
V
CC
O
0
O
1
O
2
O
3
O
4
O
5
O
6
2570 drw 02
DIP/SOIC/QSOP/CERPACK
TOP VIEW
INDEX
V
CC
NC
1
A
1
A
0
3 2
A
2
O
7
O
6
O
5
O
4
O
3
O
2
O
1
O
0
2570 drw 01
4
5
6
7
8
20 19
18
17
16
15
14
O
0
O
1
O
2
NC
O
3
O
4
E
1
NC
E
2
E
3
L20-2
9 10 11 12 13
GND
NC
O
7
LCC
TOP VIEW
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
漏1995
Integrated Device Technology, Inc.
O
6
O
5
2570 drw 03
APRIL 1995
DSC-4213/5
6.3
1

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