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(R)
FAST CMOS 8-BIT IDENTITY COMPARATOR
Integrated Device Technology, Inc.
IDT54/74FCT521 IDT54/74FCT521A IDT54/74FCT521B IDT54/74FCT521C
FEATURES:
* * * * * * * * * * IDT54/74FCT521 equivalent to FAST 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 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 (5A max.)
TM
* 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 IA = B also serves as an active LOW enable input.
FUNCTIONAL BLOCK DIAGRAM
PIN CONFIGURATIONS
IA=B 1 2 3 4 5 6 7 8 9 10 P20-1 D20-1 SO20-2 & E20-1 20 19 18 17 16 15 14 13 12 11 VCC OA=B B7 A7 B6 A6 B5 A5 B4 A4
2604 drw 01
A0 B0 A1 B1 A2 B2 A3 B3 A4 B4 A5 B5 A6 B6 A7 B7 IA=B
2604 drw 03
A0 B0 A1 B1 A2 B2 A3 B3 GND
OA=B
DIP/SOIC/CERPACK TOP VIEW
32 A1 B1 A2 B2 A3 4 5 6 7 8
A0 IA=B VCC
1
B0
INDEX
20 19 18 17 16 15 14
OA=B
B7 A7 B6 A6 B5
L20-2
9 10 11 12 13
GND
B3
B4
A4
A5
2604 drw 02
The IDT logo is a registered trademark of Integrated Device Technology, Inc. FAST is a trademark of National Semiconductor Co.
LCC TOP VIEW
MILITARY AND COMMERCIAL TEMPERATURE RANGES
(c)1992 Integrated Device Technology, Inc.
MAY 1992
DSC-4617/2
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IDT54/74FCT521/A/B/C FAST CMOS 8-BIT IDENTITY COMPARATOR
MILITARY AND COMMERCIAL TEMPERATURE RANGES
PIN DESCRIPTION
Pin Names A0 - A7 B0 - B7
IA OA
FUNCTION TABLE(1)
Description
INPUTS
IA
OUTPUT A, B A = B* AB A = B* AB
OA
Word A Inputs Word B Inputs Expansion or Enable Input (Active LOW) Identity Output (Active LOW)
2604 tbl* 05
=B L L H H
=B
=B =B
L H H H
2604 tbl* 06
NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level *A0 = B0, A1 = B1, A2 = B2, etc.
ABSOLUTE MAXIMUM RATINGS(1)
Symbol
VTERM(2)
CAPACITANCE (TA = +25C, f = 1.0MHz)
Unit
V
Rating
Terminal Voltage with Respect to GND Terminal Voltage with Respect to GND Operating Temperature Temperature Under Bias Storage Temperature Power Dissipation DC Output Current
Commercial
-0.5 to +7.0
Military
-0.5 to +7.0
VTERM(3)
-0.5 to VCC
-0.5 to VCC
V
Symbol Parameter(1) Input CIN Capacitance COUT Output Capacitance
Conditions VIN = 0V VOUT = 0V
Typ. 6 8
Max. 10 12
Unit pF pF
NOTE: 2604 tbl* 02 1. This parameter is measured at characterization but not tested.
TA TBIAS TSTG PT IOUT
0 to +70 -55 to +125 -55 to +125 0.5 120
-55 to +125 -65 to +135 -65 to +150 0.5 120
C C C W mA
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.
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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 = 0C to +70C, VCC = 5.0V 5%; Military: TA = -55C to +125C, VCC = 5.0V 10%
Symbol VIH VIL II H II L VIK IOS VOH Parameter Input HIGH Level Input LOW Level Input HIGH Current Input LOW Current Clamp Diode Voltage Short Circuit Current Output HIGH Voltage VCC = Min., IN = -18mA VCC = Max.(3) , VO = GND IOH = -300A IOH = -12mA MIL. IOH = -15mA COM'L. VOL Output LOW Voltage VCC = 3V, VIN = VLC or VHC, IOL = 300A VCC = Min. VIN = VIH or VIL IOL = 300A IOL = 32mA MIL. IOL = 48mA COM'L. VCC = 3V, VIN = VLC or VHC, IOH = -32A VCC = Min.
VIN = VIH or VIL
Test Conditions(1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max. VI = VCC VI = 2.7V VI = 0.5V VI = GND
Min. 2.0 -- -- -- -- -- -- -60 VHC VHC 2.4 2.4 -- -- -- --
Typ.(2) -- -- -- -- -- -- -0.7 -120 VCC VCC 4.3 4.3 GND GND 0.3 0.3
Max. -- 0.8 5 5(4) -5(4) -5 -1.2 -- -- -- -- -- VLC VLC(4) 0.5 0.5
Unit V V A
V mA V
V
NOTES: 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, +25C 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.
2604 tbl* 03
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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 ICC ICC ICCD Parameter Quiescent Power Supply Current Quiescent Power Supply Current TTL Inputs HIGH Dynamic Power Supply Current (4) Test Conditions(1) VCC = Max. VIN VHC; VIN VLC VCC = Max. VIN = 3.4V(3) VCC = Max. Outputs Open One Input Toggling 50% Duty Cycle VCC = Max. Outputs Open fi = 10MHz One Bit Toggling 50% Duty Cycle Min. -- Typ.(2) 0.2 Max. 1.5 Unit mA
-- VIN VHC VIN VLC --
0.5 0.15
2.0 0.25
mA mA/ MHz
IC
Total Power Supply Current (5)
VIN VHC VIN VLC (FCT) VIN = 3.4V VIN = GND
-- --
1.7 2.0
4.0 5.0
mA
NOTES: 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, +25C ambient. 3. Per TTL driven input (VIN = 3.4V); all other inputs at VCC or GND. 4. This parameter is not directly testable, but is derived for use in Total Power Supply calculations. 5. IC = IQUIESCENT + IINPUTS + IDYNAMIC IC = ICC + ICC DHNT + ICCD (fCP/2 + fiNi) ICC = Quiescent Current ICC = Power Supply Current for a TTL High Input (VIN = 3.4V) DH = Duty Cycle for TTL Inputs High NT = Number of TTL Inputs at DH ICCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL) fCP = 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.
2604 tbl* 04
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
IDT54/74FCT521 Com'l. Symbol tPLH tPHL Mil. IDT54/74FCT521A Com'l. Mil. IDT54/74FCT521B Com'l. Mil. IDT54/74FCT521C Com'l. Mil. Unit ns
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. Propagation CL = 50pF Delay An or Bn to
OA
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
RL = 500
=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
tPLH tPHL
Propagation Delay IA = B to
OA = B NOTES: 1. See test circuit and waveforms. 2. Minimum limits are guaranteed but not tested on Propagation Delays.
2604 tbl* 07
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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 500 VIN Pulse Generator RT D.U.T. 50pF CL 500 V OUT 7.0V
SWITCH POSITION
Test Open Drain Disable Low Enable Low All Other Tests Switch Closed Open
DEFINITIONS: 2604 tbl 08 CL = Load capacitance: includes jig and probe capacitance. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator.
SET-UP, HOLD AND RELEASE TIMES
DATA INPUT t SU TIMING INPUT ASYNCHRONOUS CONTROL PRESET CLEAR ETC. SYNCHRONOUS CONTROL PRESET CLEAR CLOCK ENABLE ETC. t REM 3V 1.5V 0V 3V 1.5V 0V tH 3V 1.5V 0V 3V 1.5V 0V
PULSE WIDTH
LOW-HIGH-LOW PULSE tW HIGH-LOW-HIGH PULSE
1.5V
1.5V
t SU
tH
PROPAGATION DELAY
3V 1.5V tPLH OUTPUT t PLH OPPOSITE PHASE INPUT TRANSITION tPHL 3V 1.5V 0V t PHL 0V VOH 1.5V VOL
ENABLE AND DISABLE TIMES
ENABLE CONTROL INPUT t PZL OUTPUT NORMALLY SWITCH LOW CLOSED t PZH OUTPUT SWITCH NORMALLY OPEN HIGH 3.5V 1.5V 0.3V t PHZ 0.3V 1.5V 0V V OH 0V t PLZ DISABLE 3V 1.5V 0V 3.5V V OL
SAME PHASE INPUT TRANSITION
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; ZO 50; tF 2.5ns; tR 2.5ns.
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IDT54/74FCT521/A/B/C FAST CMOS 8-BIT IDENTITY COMPARATOR
MILITARY AND COMMERCIAL TEMPERATURE RANGES
ORDERING INFORMATION
IDT XX Temp. Range FCT XXXX Device Type X Package 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 -55C to +125C 0C to +70C
2604 cnv* 09
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