IDT74FCT521T Datasheet, PDF (1/5 Pages) Integrated Device Technology – FAST CMOS 8-BIT IDENTITY COMPARATOR

Integrated Device Technology, Inc.
FAST CMOS 8-BIT
IDENTITY COMPARATOR
IDT54/74FCT521T
IDT54/74FCT521AT
IDT54/74FCT521BT
IDT54/74FCT521CT
FEATURES:
• Std., A, B and C speed grades
• Low input and output leakage ≤1µA (max.)
• CMOS power levels
• True TTL input and output compatibility
– VOH = 3.3V (typ.)
– VOL = 0.3V (typ.)
• High drive outputs (-15mA IOH, 48mA IOL)
• 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, SSOP, QSOP, CERPACK and
LCC packages
FUNCTIONAL BLOCK DIAGRAM
DESCRIPTION:
The IDT54/74FCT521T/AT/BT/CT are 8-bit identity com-
parators built using an advanced dual metal CMOS technol-
ogy. These devices compare two words of up to eight bits each
and provide a LOW output when the two words match bit for
bit. The expansion input IA = B also serves as an active LOW
enable input.
PIN CONFIGURATIONS
IA=B
1
20
VCC
A0
A0
2
19
OA=B
B0
B0
3 _P20-1 18
B7
A1
A1 4 _D20-1 17
A7
B1
B1
5 ^SO20-2 16
B6
A2
6 ^SO20-7 15
A6
A2
B2
SO20-8
B2
7
& ¹⁴
B5
A3 8 E20-1 13
A5
A3
B3
9
12
B4
B3
GND 10
11
A4
A4
OA=B
DIP/SOIC/SSOP/QSOP/CERPACK
2572 drw 02
B4
TOP VIEW
A5
B5
INDEX
A6
B6
3 2 20 19
A7
A1
4
1
18 _B7
B7
B1
5
17 A7
IA=B
A2
6
L20-2
16 ^B6
2572 drw 01
B2
7
15 A6
A3
8
14 B5
9 10 11 12 13
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
©1995 Integrated Device Technology, Inc.
6.16
LCC
TOP VIEW
2572 drw 03
APRIL 1995
DSC-4210/4
1