Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
MAY 1992
1992 Integrated Device Technology, Inc.
7.16
DSC-4617/2
PIN CONFIGURATIONS
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
FAST is a trademark of National Semiconductor Co.
FEATURES:
IDT54/74FCT521 equivalent to FAST
TM
speed
IDT54/74FCT521A 35% faster than FAST
IDT54/74FCT521B 50% faster than FAST
IDT54/74FCT521C 60% faster than FAST
Equivalent 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.)
FUNCTIONAL BLOCK DIAGRAM
FAST CMOS 8-BIT
IDENTITY COMPARATOR
IDT54/74FCT521
IDT54/74FCT521A
IDT54/74FCT521B
IDT54/74FCT521C
2604 drw 03
O
A=B
A
0
B
0
A
1
B
1
A
2
B
2
A
3
B
3
GND
B
7
A
7
B
6
A
6
A
5
A
4
B
5
B
4
V
CC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
DIP/SOIC/CERPACK
TOP VIEW
P20-1
D20-1
SO20-2
&
E20-1
I
A=B
2604 drw 01
INDEX
A
1
B
1
A
2
B
2
A
3
B
7
A
7
B
6
A
6
B
5
A
0
B
0
I
A=B
V
CC
O
A=B
B
3
GND
A
4
B
4
A
5
LCC
TOP VIEW
3
2
20 19
1
4
5
6
7
8
18
17
16
15
14
9 10 11 12 13
L20-2
2604 drw 02
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
1
Product available in Radiation Tolerant and Radiation
Enhanced versions
JEDEC standard pinout for DIP and LCC
Military product compliant to MIL-STD-883, Class B
DESCRIPTION:
The IDT54/74FCT521/A/B/C are 8-bit identity comparators
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.
7.16
2
IDT54/74FCT521/A/B/C FAST CMOS
8-BIT IDENTITY COMPARATOR
MILITARY AND COMMERCIAL TEMPERATURE RANGES
FUNCTION TABLE
(1)
PIN DESCRIPTION
NOTE:
2604 tbl* 06
1. H = HIGH Voltage Level
L = LOW Voltage Level
*
A
0 =
B
0,
A
1 =
B
1,
A
2 =
B
2, etc.
ABSOLUTE MAXIMUM RATINGS
(1)
CAPACITANCE
(T
A
= +25
C, f = 1.0MHz)
Symbol
Rating
Commercial
Military
Unit
V
TERM
(2)
Terminal Voltage
with Respect to
GND
0.5 to +7.0
0.5 to +7.0
V
V
TERM
(3)
Terminal Voltage
with Respect to
GND
0.5 to V
CC
0.5 to V
CC
V
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
NOTE:
2604 tbl* 02
1. This parameter is measured at characterization but not tested.
NOTES:
2604 tbl* 01
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. Outputs and I/O terminals only.
2604 tbl* 05
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
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)
INPUTS
OUTPUT
I
I
A
=
B
A, B
O
O
A = B
L
L
H
H
A = B*
A
B
A = B*
A
B
L
H
H
H
IDT54/74FCT521/A/B/C FAST CMOS
8-BIT IDENTITY COMPARATOR
MILITARY AND COMMERCIAL TEMPERATURE RANGES
7.16
3
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
= 0
C to +70
C, V
CC
= 5.0V
5%; Military: T
A
= 55
C to +125
C, V
CC
= 5.0V
10%
Symbol
Parameter
Test Conditions
(1)
Min.
Typ.
(2)
Max.
Unit
V
IH
Input HIGH Level
Guaranteed Logic HIGH Level
2.0
--
--
V
V
IL
Input LOW Level
Guaranteed Logic LOW Level
--
--
0.8
V
I
I H
Input HIGH Current
V
CC
= Max.
V
I
= V
CC
--
--
5
A
V
I
= 2.7V
--
--
5
(4)
I
I L
Input LOW Current
V
I
= 0.5V
--
--
5
(4)
V
I
= GND
--
--
5
V
IK
Clamp Diode Voltage
V
CC
= Min., I
N
= 18mA
--
0.7
1.2
V
I
OS
Short Circuit Current
V
CC
= Max.
(3)
, V
O
= GND
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
V
CC
= Min.
I
OH
= 300
A
V
HC
V
CC
--
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
V
CC
= Min.
I
OL
= 300
A
--
GND
V
LC(4)
V
IN
= V
IH
or V
IL
I
OL
= 32mA MIL.
--
0.3
0.5
I
OL
= 48mA COM'L.
--
0.3
0.5
NOTES:
2604 tbl* 03
1. For conditions shown as Max. or Min., 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 shorted at one time. Duration of the short circuit test should not exceed one second.
4. This parameter is guaranteed but not tested.
7.16
4
IDT54/74FCT521/A/B/C FAST CMOS
8-BIT IDENTITY COMPARATOR
MILITARY AND COMMERCIAL TEMPERATURE RANGES
POWER SUPPLY CHARACTERISTICS
V
LC
= 0.2V; V
HC
= V
CC
0.2V
NOTES:
2604 tbl* 04
1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at V
CC
= 5.0V, +25
C 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. 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.
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
NOTES:
2604 tbl* 07
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
Symbol
Parameter
Test Conditions
(1)
Min.
Typ.
(2)
Max.
Unit
I
CC
Quiescent Power Supply Current
V
CC
= Max.
V
IN
V
HC
; V
IN
V
LC
--
0.2
1.5
mA
I
CC
Quiescent Power Supply Current
TTL Inputs HIGH
V
CC
= Max.
V
IN
= 3.4V
(3)
--
0.5
2.0
mA
I
CCD
Dynamic Power Supply Current
(4)
V
CC
= Max.
Outputs Open
One Input Toggling
50% Duty Cycle
V
IN
V
HC
V
IN
V
LC
--
0.15
0.25
mA/
MHz
I
C
Total Power Supply Current
(5)
V
CC
= Max.
Outputs Open
V
IN
V
HC
V
IN
V
LC
(FCT)
--
1.7
4.0
mA
fi = 10MHz
One Bit Toggling
50% Duty Cycle
V
IN
= 3.4V
V
IN
= GND
--
2.0
5.0
IDT54/74FCT521
IDT54/74FCT521A
IDT54/74FCT521B
IDT54/74FCT521C
Com'l.
Mil.
Com'l.
Mil.
Com'l.
Mil.
Com'l.
Mil.
Symbol
Parameter Condition
(1)
Min.
(2)
Max.
Min.
(2)
Max.
Min.
(2)
Max.
Min.
(2)
Max.
Min.
(2)
Max.
Min.
(2)
Max.
Min.
(2)
Max.
Min.
(2)
Max.
Unit
t
PLH
t
PHL
Propagation
Delay
An or Bn to
O
A
=
B
C
L
= 50pF
R
L
= 500
1.5
11.0
1.5
15.0
1.5
7.2
1.5
9.5
1.5
5.5
1.5
7.3
1.5
4.5
1.5
5.1
ns
t
PLH
t
PHL
Propagation
Delay
I
A
=
B
to
O
A
=
B
1.5
10.0
1.5
9.0
1.5
6.0
1.5
7.8
1.5
4.6
1.5
6.0
1.5
4.1
1.5
4.5
ns
IDT54/74FCT521/A/B/C FAST CMOS
8-BIT IDENTITY COMPARATOR
MILITARY AND COMMERCIAL TEMPERATURE RANGES
7.16
5
TEST CIRCUITS AND WAVEFORMS
TEST CIRCUITS FOR ALL OUTPUTS
ENABLE AND DISABLE TIMES
PROPAGATION DELAY
SET-UP, HOLD AND RELEASE TIMES
PULSE WIDTH
Pulse
Generator
DATA
INPUT
TIMING
INPUT
ASYNCHRONOUS CONTROL
PRESET
CLEAR
ETC.
SYNCHRONOUS CONTROL
PRESET
CLEAR
CLOCK ENABLE
ETC.
3V
1.5V
0V
3V
1.5V
0V
3V
1.5V
0V
3V
1.5V
0V
t
SU
t
H
t
REM
H
t
SU
R
T
D.U.T.
V
CC
V
IN
C
L
V
OUT
50pF
500
500
7.0V
SAME PHASE
INPUT TRANSITION
3V
1.5V
0V
1.5V
V
OH
V
OL
t
PLH
t
PHL
OUTPUT
OPPOSITE PHASE
INPUT TRANSITION
CONTROL
INPUT
3V
1.5V
0V
3.5V
0V
OUTPUT
NORMALLY
LOW
OUTPUT
NORMALLY
HIGH
SWITCH
CLOSED
SWITCH
OPEN
V
OL
V
OH
3V
1.5V
0V
t
PLH
t
PHL
0.3V
0.3V
t
PLZ
t
PZL
t
PZH
t
PHZ
3.5V
0V
1.5V
1.5V
ENABLE
DISABLE
HIGH-LOW-HIGH
PULSE
LOW-HIGH-LOW
PULSE
t
W
1.5V
1.5V
t
NOTES
2604 drw 04
1. Diagram shown for input Control Enable-LOW and input Control
Disable-HIGH.
2. Pulse Generator for All Pulses: Rate
1.0 MHz; Z
O
50
; t
F
2.5ns;
t
R
2.5ns.
SWITCH POSITION
Test
Switch
Open Drain
Disable Low
Closed
Enable Low
All Other Tests
Open
DEFINITIONS:
2604 tbl 08
C
L
= Load capacitance: includes jig and probe capacitance.
R
T
= Termination resistance: should be equal to Z
OUT
of the Pulse
Generator.
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