查询IDT54FCT521ADB供应商
Integrated Device Technology, Inc.
FAST CMOS 8-BIT
IDENTITY COMPARATOR
IDT54/74FCT521
IDT54/74FCT521A
IDT54/74FCT521B
IDT54/74FCT521C
FEATURES:
• IDT54/74FCT521 equivalent to FASTTM 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
(5µA max.)
FUNCTIONAL BLOCK DIAGRAM
A0
B0
A1
B1
A2
B2
A3
B3
A4
B4
OA=B
• 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.
PIN CONFIGURATIONS
A=B
I
A0
B0
A1
B1
A2
B2
A3
B3
GND
2
3
4
5
6
7
8
9
10 11
DIP/SOIC/CERPACK
P20-1
D20-1
SO20-2
&
E20-1
TOP VIEW
20
19
18
17
16
15
14
13
12
VCC1
OA=B
B
7
A7
B6
A6
B5
A5
B4
A4
2604 drw 01
A5
B5
A6
B6
A7
B7
IA=B
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
FAST is a trademark of National Semiconductor Co.
2604 drw 03
INDEX
A1
B1
A2
B2
A3
B0
A0
IA=B
3 2 20 19
4
5
6
7
8
1
L20-2
9 10111213
4
B3
A
GND
LCC
TOP VIEW
VCC
B4
OA=B
18
17
16
15
14
A5
B7
A7
B6
A6
B5
2604 drw 02
MILITARY AND COMMERCIAL TEMPERATURE RANGES MAY 1992
1992 Integrated Device Technology, Inc. 7.16 DSC-4617/2
1
IDT54/74FCT521/A/B/C FAST CMOS
8-BIT IDENTITY COMPARATOR MILITARY AND COMMERCIAL TEMPERATURE RANGES
PIN DESCRIPTION
Pin Names Description
A0 - A
7
B0 - B
7
IA =
B
OA =
B
ABSOLUTE MAXIMUM RATINGS
Symbol Rating Commercial Military Unit
(2)
VTERM
VTERM
TA Operating
TBIAS Temperature
TSTG Storage
PT Power
IOUT DC Output
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. Outputs and I/O terminals only.
Terminal Voltage
with Respect to
GND
(3)
Terminal Voltage
with Respect to
GND
Temperature
Under Bias
Temperature
Dissipation
Current
Word A Inputs
Word B Inputs
Expansion or Enable Input (Active LOW)
Identity Output (Active LOW)
2604 tbl* 05
(1)
–0.5 to +7.0 –0.5 to +7.0 V
–0.5 to VCC –0.5 to VCC V
0 to +70 –55 to +125 °C
–55 to +125 –65 to +135 °C
–55 to +125 –65 to +150 °C
0.5 0.5 W
120 120 mA
2604 tbl* 01
FUNCTION TABLE
(1)
INPUTS OUTPUT
I
A = B A, B
I
L
L
H
H
NOTE: 2604 tbl* 06
1. H = HIGH Voltage Level
L = LOW Voltage Level
*
A0 = B0, A1 = B1, A2 = B2, etc.
A = B*
A ≠ B
A = B*
A ≠ B
O
O
A = B
L
H
H
H
CAPACITANCE (TA = +25°C, f = 1.0MHz)
Symbol Parameter
C
C
IN
OUT
Input
Capacitance
Output
Capacitance
NOTE: 2604 tbl* 02
1. This parameter is measured at characterization but not tested.
(1)
Conditions Typ. Max. Unit
IN
= 0V 6 10 pF
V
V
OUT
= 0V 8 12 pF
7.16 2
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: T
Symbol Parameter Test Conditions
A = 0°C to +70°C, VCC = 5.0V ± 5%; Military: TA = –55°C to +125°C, VCC
(1)
VIH Input HIGH Level Guaranteed Logic HIGH Level 2.0 — — V
VIL Input LOW Level Guaranteed Logic LOW Level — — 0.8 V
II H Input HIGH Current VCC = Max. VI = VCC —— 5µA
VI = 2.7V — — 5
II L Input LOW Current VI = 0.5V — — –5
VI = GND — — –5
VIK Clamp Diode Voltage VCC = Min., IN = –18mA — –0.7 –1.2 V
IOS Short Circuit Current VCC = Max.
(3)
, VO = GND –60 –120 — mA
VOH Output HIGH Voltage VCC = 3V, VIN = VLC or VHC, IOH = –32µAVHC VCC —V
VCC = Min. IOH = –300µAVHC VCC —
VIN = VIH or VIL IOH = –12mA MIL. 2.4 4.3 —
IOH = –15mA COM'L. 2.4 4.3 —
VOL Output LOW Voltage VCC = 3V, VIN = VLC or VHC, IOL = 300µA — GND VLC V
VCC = Min. IOL = 300µA — GND VLC
VIN = VIH or VIL IOL = 32mA MIL. — 0.3 0.5
IOL = 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.
= 5.0V ± 10%
Min. Typ.
(2)
Max. Unit
(4)
(4)
(4)
7.16 3
IDT54/74FCT521/A/B/C FAST CMOS
8-BIT IDENTITY COMPARATOR MILITARY AND COMMERCIAL TEMPERATURE RANGES
POWER SUPPLY CHARACTERISTICS VLC = 0.2V; VHC = VCC – 0.2V
Symbol Parameter Test Conditions
ICC Quiescent Power Supply Current VCC = Max.
V
IN ≥ VHC; VIN ≤ VLC
∆ICC
Quiescent Power Supply Current
TTL Inputs HIGH
ICCD Dynamic Power Supply Current
(4)
VCC = Max.
V
IN = 3.4V
VCC = Max.
(3)
Outputs Open
(1)
VIN ≥ VHC
VIN ≤ VLC
Min. Typ.
— 0.2 1.5 mA
— 0.5 2.0 mA
— 0.15 0.25 mA/
One Input Toggling
50% Duty Cycle
IC Total Power Supply Current
(5)
VCC = Max.
Outputs Open
fi = 10MHz
One Bit Toggling
VIN ≥ VHC
VIN ≤ VLC (FCT)
VIN = 3.4V
V
IN = GND
— 1.7 4.0 mA
— 2.0 5.0
50% Duty Cycle
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
3. Per TTL driven input (V
4. This parameter is not directly testable, but is derived for use in Total Power Supply calculations.
5. I
C = IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC + ∆ICC DHNT + ICCD (fCP/2 + fiNi)
CC = Quiescent Current
I
CC = Power Supply Current for a TTL High Input (VIN = 3.4V)
∆I
D
H = Duty Cycle for TTL Inputs High
T = Number of TTL Inputs at DH
N
ICCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL)
CP = Clock Frequency for Register Devices (Zero for Non-Register Devices)
f
fi = Input Frequency
Ni = Number of Inputs at fi
All currents are in milliamps and all frequencies are in megahertz.
CC = 5.0V, +25°C ambient.
IN = 3.4V); all other inputs at VCC or GND.
(2)
Max. Unit
MHz
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
IDT54/74FCT521 IDT54/74FCT521A IDT54/74FCT521B IDT54/74FCT521C
Com'l. Mil. Com'l. Mil. Com'l. Mil. Com'l. Mil.
(2)
(1)
Min.
Symbol Parameter Condition
t
PLH
t
PHL
Propagation
Delay
CL = 50pF
L
= 500
R
Ω
Max. Min.
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
An or Bn to
A
=
B
O
t
PLH
t
PHL
Propagation
Delay
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
IA = B to
O
A
=
B
NOTES: 2604 tbl* 07
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
(2)
Max. Min.
(2)
Max. Min.
(2)
Max. Min.
(2)
Max. Min.
(2)
Max. Min.
(2)
Max. Min.
(2)
Max.
Unit
7.16 4
IDT54/74FCT521/A/B/C FAST CMOS
8-BIT IDENTITY COMPARATOR MILITARY AND COMMERCIAL TEMPERATURE RANGES
TEST CIRCUITS AND WAVEFORMS
TEST CIRCUITS FOR ALL OUTPUTS
VCC
500Ω
Pulse
Generator
VIN
D.U.T.
RT
VOUT
50pF
CL
500Ω
7.0V
SWITCH POSITION
Test Switch
Open Drain
Disable Low Closed
Enable Low
All Other Tests Open
DEFINITIONS: 2604 tbl 08
CL = Load capacitance: includes jig and probe capacitance.
T = Termination resistance: should be equal to ZOUT of the Pulse
R
Generator.
SET-UP, HOLD AND RELEASE TIMES PULSE WIDTH
DATA
INPUT
TIMING
INPUT
ASYNCHRONOUS CONTROL
PRESET
CLEAR
ETC.
SYNCHRONOUS CONTROL
PRESET
CLOCK ENABLE
CLEAR
ETC.
t
tSU
SU
t
REM
t
t
H
H
3V
1.5V
0V
3V
1.5V
0V
3V
1.5V
0V
3V
1.5V
0V
LOW-HIGH-LOW
HIGH-LOW-HIGH
PULSE
PULSE
1.5V
t
W
1.5V
SAME PHASE
INPUT TRANSITION
OUTPUT
OPPOSITE PHASE
INPUT TRANSITION
t
t
PLH
PLH
t
t
PHL
PHL
3V
1.5V
0V
V
OH
1.5V
V
OL
3V
1.5V
0V
ENABLE AND DISABLE TIMESPROPAGATION DELAY
ENABLE DISABLE
3V
CONTROL
INPUT
t
PHZ
t
PLZ
OUTPUT
NORMALLY
LOW
OUTPUT
NORMALLY
HIGH
t
PZL
SWITCH
CLOSED
t
PZH
SWITCH
OPEN
3.5V
1.5V
1.5V
0V
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
t
R ≤ 2.5ns.
1.5V
0V
3.5V
0.3V
V
OL
V
OH
0.3V
0V
O ≤ 50Ω; tF ≤ 2.5ns;
7.16 5
IDT54/74FCT521/A/B/C FAST CMOS
8-BIT IDENTITY COMPARATOR MILITARY AND COMMERCIAL TEMPERATURE RANGES
ORDERING INFORMATION
IDT XX FCT XXXX
Temp. Range
Device TypeXPackage
X
Process
Blank
B
P
D
E
L
SO
521
521A
521B
521C
54
74
Commercial
MIL-STD-883, Class B
Plastic DIP
CERDIP
CERPACK
Leadless Chip Carrier
Small Outline IC
8-Bit Comparator
Fast 8-Bit Comparator
Very Fast 8-Bit Comparator
Super Fast 8-Bit Comparator
–55
°
C to +125°C
0
°
C to +70°C
2604 cnv* 09
7.16 6
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