MILITARY AND COMMERCIAL TEMPERATURE RANGES
IDT54/74FCT521/A/B/C
FAST CMOS 8-BIT IDENTITY COMPARATOR
1
JUNE 2002
MILITARY AND COMMERCIAL TEMPERATURE RANGES
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
2002 Integrated Device Technology, Inc.
DSC-4617/6
FEATURES:
IDT54/74FCT521 equivalent to FASTTM 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
I
OL
= 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 (5
A max.)
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
FUNCTIONAL BLOCK DIAGRAM
IDT54/74FCT521/A/B/C
FAST CMOS
8-BIT IDENTITY
COMPARATOR
DESCRIPTION:
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 I
A = B
also serves as an active low enable input.
A
0
B
0
A
1
B
1
A
2
B
2
A
3
B
3
A
4
B
4
A
5
B
5
A
6
B
6
A
7
B
7
I
A=B
O
A=B
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
18
1
19
MILITARY AND COMMERCIAL TEMPERATURE RANGES
2
IDT54/74FCT521/A/B/C
FAST CMOS 8-BIT IDENTITY COMPARATOR
PIN CONFIGURATION
CERDIP/ SOIC
TOP VIEW
LCC
TOP VIEW
Symbol
Rating
Commercial
Military
Unit
V
TERM
(2)
Terminal Voltage
0.5 to +7
0.5 to +7
V
with Respect to GND
V
TERM
(3)
Terminal Voltage
0.5 to V
CC
0.5 to V
CC
V
with Respect to GND
T
A
Operating Temperature
0 to +70
55 to +125
C
T
BIAS
Temperature under BIAS
55 to +125
65 to +135
C
T
STG
Storage Temperature
55 to +125
65 to +150
C
P
T
Power Dissipation
0.5
0.5
W
I
OUT
DC Output Current
120
120
mA
ABSOLUTE MAXIMUM RATINGS
(1)
NOTES:
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause
permanent damage to the device. This is a stress rating only and functional operation
of the device at these or any other conditions above those indicated in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect reliability. No terminal voltage may exceed
Vcc by +0.5V unless otherwise noted.
2. Input and Vcc terminals only.
3. Output and I/O terminals only.
Symbol
Parameter
(1)
Conditions
Typ.
Max.
Unit
C
IN
Input Capacitance
V
IN
= 0V
6
10
pF
C
OUT
Output Capacitance
V
OUT
= 0V
8
12
pF
CAPACITANCE
(T
A
= +25C, F = 1.0MHz)
NOTE:
1. This parameter is measured at characterization but not tested.
1
2
3
4
5
7
9
6
8
10
11
12
13
14
15
16
17
18
19
20
B
6
B
7
A
7
A
6
B
5
I
A
=
B
B
0
A
0
V
C
C
B
3
G
N
D
A
4
B
4
A
5
INDEX
A
1
B
1
A
3
A
2
B
2
O
A
=
B
2
3
1
16
15
14
11
19
18
20
17
13
12
5
6
7
4
8
9
10
A
1
A
0
B
0
V
CC
B
1
A
3
A
2
B
2
B
3
GND
O
A=B
B
6
B
7
A
7
A
6
B
4
B
5
A
5
A
4
I
A=B
Pin Names
Description
A
0
- A
7
Word A Inputs
B
0
- B
7
Word B Inputs
I
A
= B
Expansion or Enable Input (Active LOW)
O
A
=
B
Identity Output (Active LOW)
PIN DESCRIPTION
FUNCTION TABLE
(1)
Inputs
Output
I
A = B
A, B
O
A = B
L
A = B*
L
L
A
B
H
H
A = B*
H
H
A
B
H
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
*
A
0 =
B
0,
A
1 =
B
1,
A
2 =
B
2, etc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
IDT54/74FCT521/A/B/C
FAST CMOS 8-BIT IDENTITY COMPARATOR
3
Symbol
Parameter
Test Conditions
(1)
Min.
Typ.
(2)
Max.
Unit
V
IH
Input HIGH Level
Guaranteed Logic HIGH Level
2
--
--
V
V
IL
Input LOW Level
Guaranteed Logic LOW Level
--
--
0.8
V
I
IH
Input HIGH Current
V
I
= V
CC
--
--
5
V
CC
= Max.
V
I
= 2.7V
--
--
5
(4)
A
I
IL
Input LOW Current
V
I
= 0.5V
--
--
5
(4)
V
I
= GND
--
--
5
I
OZH
V
O
= V
CC
--
--
10
Off State (High Impedance)
V
CC
= Max.
V
O
= 2.7V
--
--
10
(4)
A
I
OZL
Output Current
V
O
= 0.5V
--
--
10
(4)
V
O
= GND
--
--
10
V
IK
Clamp Diode Voltage
V
CC
= Min., I
IN
= 18mA
--
0.7
1.2
V
I
OS
Short Circuit Current
V
CC
= Max., V
O
= GND
(3)
60
120
--
mA
V
OH
Output HIGH Voltage
V
CC
= 3V, V
IN
= V
LC
or V
HC
, I
OH
= 32
A
V
HC
V
CC
--
V
CC
= Min
I
OH
= 300
A
V
HC
V
CC
--
V
V
IN
= V
IH
or V
IL
I
OH
= 12mA MIL
2.4
4.3
--
I
OH
= 15mA COM'L
2.4
4.3
--
V
OL
Output LOW Voltage
V
CC
= 3V, V
IN
= V
LC
or V
HC
, I
OL
= 300
A
--
GND
V
LC
V
CC
= Min
I
OL
= 300
A
--
GND
V
LC
(4)
V
V
IN
= V
IH
or V
IL
I
OL
= 32mA MIL
--
0.3
0.5
I
OL
= 48mA COM'L
--
0.3
0.5
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified: V
LC
= 0.2V; V
HC
= V
CC
- 0.2V
Commercial: T
A
= 0C to +70C, V
CC
= 5.0V 5%, Military: T
A
= -55C to +125C, V
CC
= 5.0V 10%
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 V
CC
= 5.0V, +25C 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.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
4
IDT54/74FCT521/A/B/C
FAST CMOS 8-BIT IDENTITY COMPARATOR
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 V
CC
= 5.0V, +25C ambient.
3. Per TTL driven input (V
IN
= 3.4V). All other inputs at V
CC
or GND.
4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations.
5. Values for these conditions are examples of
I
CC
formula. These limits are guaranteed but not tested.
6. I
C
= I
QUIESCENT
+ I
INPUTS
+ I
DYNAMIC
I
C
= I
CC
+
I
CC
D
H
N
T
+ I
CCD
(f
CP
/2 + fiNi)
I
CC
= Quiescent Current
I
CC
= Power Supply Current for a TTL High Input (V
IN
= 3.4V)
D
H
= Duty Cycle for TTL Inputs High
N
T
= Number of TTL Inputs at D
H
I
CCD
= Dynamic Current caused by an Input Transition Pair (HLH or LHL)
f
CP
= Clock Frequency for register devices (zero for non-register devices)
fi = Input Frequency
Ni = Number of Inputs at fi
All currents are in milliamps and all frequencies are in megahertz.
POWER SUPPLY CHARACTERISTICS
V
LC
= 0.2V; V
HC
= V
CC
- 0.2V
Symbol
Parameter
Test Conditions
(1)
Min.
Typ.
(2)
Max.
Unit
I
CC
Quiescent Power Supply Current
V
CC
= Max.
--
0.2
1.5
mA
V
IN
V
HC
; V
IN
V
LC
I
CC
Quiescent Power Supply Current
V
CC
= Max.
--
0.5
2
mA
TTL Inputs HIGH
V
IN
= 3.4V
(3)
I
CCD
Dynamic Power Supply
V
CC
= Max.
V
IN
V
HC
--
0.15
0.25
mA/
Current
(4)
Outputs Open
V
IN
V
LC
MHz
One Input Toggling
50% Duty Cycle
I
C
Total Power Supply Current
(5,6)
V
CC
= Max.
V
IN
V
HC
--
1.7
4
mA
Outputs Open
V
IN
V
LC
(FCT)
f
I
= 10MHz
V
IN
= 3.4V
--
2
5
One Bit Toggling
V
IN
= GND
50% Duty Cycle
NOTES:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
SWITCHING CHARACTERISTICS OVER OPERATING RANGE - COMMERCIAL
74FCT521A
74FCT521B
74FCT521C
Symbol
Parameter
Condition
(1)
Min.
(2)
Max.
Min.
(2)
Max.
Min.
(2)
Max.
Unit
t
PLH
Propagation Delay
C
L
= 50pF
1.5
7.2
1.5
5.5
1.5
4.5
ns
t
PHL
Ax or Bx to O
A
=
B
R
L
= 500
t
PLH
Propagation Delay
1.5
6
1.5
4.6
1.5
4.1
ns
t
PHL
I
A
=
B
to O
A
=
B
SWITCHING CHARACTERISTICS OVER OPERATING RANGE - MILITARY
54FCT521
54FCT521A
54FCT521B
Symbol
Parameter
Condition
(1)
Min.
(2)
Max.
Min.
(2)
Max.
Min.
(2)
Max.
Unit
t
PLH
Propagation Delay
C
L
= 50pF
1.5
15
1.5
9.5
1.5
7.3
ns
t
PHL
Ax or Bx to O
A
=
B
R
L
= 500
t
PLH
Propagation Delay
1.5
9
1.5
7.8
1.5
6
ns
t
PHL
I
A
=
B
to O
A
=
B
MILITARY AND COMMERCIAL TEMPERATURE RANGES
IDT54/74FCT521/A/B/C
FAST CMOS 8-BIT IDENTITY COMPARATOR
5
Pulse
Generator
R
T
D.U.T
.
V
CC
V
IN
C
L
V
OUT
50pF
500
500
7.0V
3V
1.5V
0V
3V
1.5V
0V
3V
1.5V
0V
3V
1.5V
0V
DATA
INPUT
TIMING
INPUT
ASYNCHRONOUS CONTROL
PRESET
CLEAR
ETC.
SYNCHRONOUS CONTROL
t
SU
t
H
t
REM
t
SU
t
H
HIGH-LOW-HIGH
PULSE
LOW-HIGH-LOW
PULSE
t
W
1.5V
1.5V
SAME PHASE
INPUT TRANSITION
3V
1.5V
0V
1.5V
V
OH
t
PLH
OUTPUT
OPPOSITE PHASE
INPUT TRANSITION
3V
1.5V
0V
t
PLH
t
PHL
t
PHL
V
OL
CONTROL
INPUT
3V
1.5V
0V
3.5V
0V
OUTPUT
NORMALLY
LOW
OUTPUT
NORMALLY
HIGH
SWITCH
CLOSED
SWITCH
OPEN
V
OL
0.3V
0.3V
t
PLZ
t
PZL
t
PZH
t
PHZ
3.5V
0V
1.5V
1.5V
ENABLE
DISABLE
V
OH
PRESET
CLEAR
CLOCK ENABLE
ETC.
Octal link
Octal link
Octal link
Octal link
Octal link
TEST CIRCUITS AND WAVEFORMS
Propagation Delay
Test Circuits for All Outputs
Enable and Disable Times
Set-Up, Hold, and Release Times
Pulse Width
NOTES:
1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH.
2. Pulse Generator for All Pulses: Rate
1.0MHz; Z
O
50; t
F
2.5ns; t
R
2.5ns.
Test
Switch
Open Drain
Disable Low
Closed
Enable Low
All Other Tests
Open
SWITCH POSITION
DEFINITIONS:
C
L
= Load capacitance: includes jig and probe capacitance.
R
T
= Termination resistance: should be equal to Z
OUT
of the Pulse Generator.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
6
IDT54/74FCT521/A/B/C
FAST CMOS 8-BIT IDENTITY COMPARATOR
ORDERING INFORMATION
CORPORATE HEADQUARTERS
for SALES:
for Tech Support:
2975 Stender Way
800-345-7015 or 408-727-6116
logichelp@idt.com
Santa Clara, CA 95054
fax: 408-492-8674
(408) 654-6459
www.idt.com
IDT XX
Temp. Range
XXXX
Device Type
XX
Package
X
Process
SO
Commercial Options
Small Outline IC
Fast CMOS 8-Bit Identity Comparator
54
74
55
C to +125
C
0
C to +70
C
D
L
Military Options
CERDIP
Leadless Chip Carrier
Blank
B
Commercial
MIL-STD-883, Class B
FCT
521
521A
521B
521C
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