IDT54/74FCT521/A/B/C
FAST CMOS 8-BIT IDENTITY COMPARATOR
MILITARY AND COMMERCIAL TEMPERATURE RANGES
FAST CMOS
8-BIT IDENTITY
COMPARATOR
FEATURES:
•
•
•
•
•
•
•
•
•
•
•
•
•
IDT54/74FCT521/A/B/C
DESCRIPTION:
IDT54/74FCT521 equivalent to FAST™ speed
IDT54/74FCT521A up to 35% faster than FAST
IDT54/74FCT521B up to 35% faster than FAST
IDT54/74FCT521C up to 60% faster than FAST
Eqivalent to FAST output drive over full temperature and voltage
supply extremes
IOL = 48mA (commercial) and 32mA (military)
CMOS power levels (1mW typ. static)
TTL input and output level compatible
CMOS output level compatible
Substantially lower input current levels than FAST (5µA max.)
µ
MIlitary product compliant to MIL-STD-883, Class B
Meets or exceeds JEDEC Standard 18 specifications
Available in the following packages:
– Commercial: SOIC
– Military: CERDIP, LCC
The FCT521 is an 8-bit identity comparator built using an advanced dual
metal CMOS technology. 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.
FUNCTIONAL BLOCK DIAGRAM
A0
B0
2
A1
B1
4
A2
B2
6
A3
B3
8
A4
B4
11
A5
B5
13
A6
B6
15
A7
B7
17
3
5
7
9
19
IA=B
OA=B
12
14
16
18
1
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
JUNE 2002
1
© 2002 Integrated Device Technology, Inc.
DSC-4617/6
IDT54/74FCT521/A/B/C
FAST CMOS 8-BIT IDENTITY COMPARATOR
MILITARY AND COMMERCIAL TEMPERATURE RANGES
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified: VLC = 0.2V; VHC = VCC - 0.2V
Commercial: TA = 0°C to +70°C, VCC = 5.0V ±5%, Military: TA = -55°C to +125°C, VCC = 5.0V ±10%
Symbol
Test Conditions(1)
Parameter
VIH
Input HIGH Level
VIL
Input LOW Level
Guaranteed Logic LOW Level
IIH
Input HIGH Current
Typ.(2)
Max.
Unit
2
Guaranteed Logic HIGH Level
Min.
—
—
V
V
—
0.8
—
—
5
VI = 2.7V
VCC = Max.
—
VI = VCC
—
—
5(4)
VI = 0.5V
IOZH
VCC = Max.
IOZL
Off State (High Impedance)
Output Current
VIK
Clamp Diode Voltage
—
—
—
–5
VO = VCC
VO = 2.7V
VO = 0.5V
VO = GND
Input LOW Current
—
VI = GND
IIL
—
—
—
—
—
—
—
—
—
–0.7
10
10(4)
–10(4)
–10
–1.2
–60
VHC
VHC
2.4
2.4
—
—
—
—
–120
VCC
VCC
4.3
4.3
GND
GND
0.3
0.3
—
—
—
—
—
VLC
VLC(4)
0.5
0.5
VCC = Min., IIN = –18mA
IOS
VOH
VOL
Short Circuit Current
Output HIGH Voltage
Output LOW Voltage
GND(3)
VCC = Max., VO =
VCC = 3V, VIN = VLC or VHC, IOH = –32µA
VCC = Min
IOH = –300µA
VIN = VIH or VIL
IOH = –12mA MIL
IOH = –15mA COM'L
VCC = 3V, VIN = VLC or VHC, IOL = 300µA
VCC = Min
IOL = 300µA
VIN = VIH or VIL
IOL = 32mA MIL
IOL = 48mA COM'L
NOTES:
1. For conditions shown as Min. or Max., use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at VCC = 5.0V, +25°C ambient and maximum loading.
3. Not more than one output should be tested at one time. Duration of the test should not exceed one second.
4. This parameter is guaranteed but not ttested.
3
µA
–5(4)
µA
V
mA
V
V
