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IDT54/74FCT521T/AT/BT/CT FAST CMOS 8-BIT IDENTITY COMPARATOR
MILITARY AND INDUSTRIAL TEMPERATURE RANGES
IDT54/74FCT521T/AT/BT/CT FAST CMOS 8-BIT IDENTITY COMPARATOR
FEATURES:
* * * *
* * * * *
Std., A, B, and C grades Low input and output leakage 1A (max.) CMOS power levels True TTL input and output compatibility: - VOH = 3.3V (typ.) - VOL = 0.3V (typ.) High Drive outputs (-15mA IOH, 48mA IOL) Meets or exceeds JEDEC standard 18 specifications Military product compliant to MIL-STD-883, Class B and DESC listed (dual marked) Power off disable outputs permit "live insertion" Available in the following packages: - Industrial: SOIC, SSOP, QSOP - Military: CERDIP, LCC
DESCRIPTION:
The IDT54/74FCT521T 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 A1 B1 A2 B2 A3 B3 A4 B4 A5 B5 A6 B6 A7 B7 IA=B
2 3 4 5 6 7 8 9
19
11 12 13 14 15 16 17 18 1
OA=B
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MILITARY AND INDUSTRIAL TEMPERATURE RANGES
1
JUNE 2002
DSC-2572/9
(c) 2002 Integrated Device Technology, Inc.
IDT54/74FCT521T/AT/BT/CT FAST CMOS 8-BIT IDENTITY COMPARATOR
MILITARY AND INDUSTRIAL TEMPERATURE RANGES
PIN CONFIGURATION
B0
A0 B0 A1 B1 A2 B2 A3 B3 GND
2 3 4 5 6 7 8 9 10
19 18 17 16 15 14 13 12 11
OA=B B7 A7 B6 A6 B5 A5 B4
B3 A4 B4
3 2 1 20 19 18 17 16 15 14 9 10 11 12 13
A1 B1 A2 B2 A3
A0
IA=B
1
20
VCC
INDEX
IA=B
OA=B
VCC
4 5 6 7 8
B7 A7 B6 A6 B5
A4
CERDIP/ SOIC/ SSOP/ QSOP TOP VIEW
LCC TOP VIEW
ABSOLUTE MAXIMUM RATINGS(1)
Symbol Description Max -0.5 to +7 -0.5 to VCC+0.5 -65 to +150 -60 to +120 Unit V V C mA VTERM(2) Terminal Voltage with Respect to GND VTERM(3) Terminal Voltage with Respect to GND TSTG IOUT Storage Temperature DC Output Current
PIN DESCRIPTION
Pin Names A0 - A7 B0 - B7 IA = B OA = B Word A Inputs Word B Inputs Expansion or Enable Input (Active LOW) Identity Output (Active LOW) Description
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. Inputs and Vcc terminals only. 3. Output and I/O terminals only.
FUNCTION TABLE(1)
Inputs IA = B L L H H A, B A = B* AB A = B* AB Output OA = B L H H H
CAPACITANCE (TA = +25C, F = 1.0MHz)
Symbol CIN COUT Parameter(1) Input Capacitance Output Capacitance Conditions VIN = 0V VOUT = 0V Typ. 6 8 Max. 10 12 Unit pF pF
NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level *A0 = B0, A1 = B1, A2 = B2, etc.
NOTE: 1. This parameter is measured at characterization but not tested.
2
GND
A5
IDT54/74FCT521T/AT/BT/CT FAST CMOS 8-BIT IDENTITY COMPARATOR
MILITARY AND INDUSTRIAL TEMPERATURE RANGES
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified: Industrial: TA = -40C to +85C, VCC = 5.0V 5%; Military: TA = -55C to +125C, VCC = 5.0V 10%
Symbol VIH VIL IIH IIL II VIK IOS VOH Parameter Input HIGH Level Input LOW Level Input HIGH Current(4) Input LOW Current(4) Input HIGH Current(4) Clamp Diode Voltage Short Circuit Current Output HIGH Voltage Test Conditions(1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max. VCC = Max. VCC = Max., VI = VCC (Max.) VCC = Min., IIN = -18mA VCC = Max., VO = VCC = Min VIN = VIH or VIL GND(3) IOH = -6mA MIL IOH = -8mA IND IOH = -12mA MIL IOH = -15mA IND IOL = 32mA MIL IOL = 48mA IND -- VCC = Max. VIN = GND or VCC VI = 2.7V VI = 0.5V Min. 2 -- -- -- -- -- -60 2.4 2 -- -- -- Typ.(2) -- -- -- -- -- -0.7 -120 3.3 3 0.3 200 0.01 Max. -- 0.8 1 1 1 -1.2 -225 -- -- 0.5 -- 1 V mV mA A V mA V Unit V V A
VOL VH ICC
Output LOW Voltage Input Hysteresis Quiescent Power Supply Current
VCC = Min VIN = VIH or VIL
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, +25C ambient. 3. Not more than one output should be tested at one time. Duration of the test should not exceed one second. 4. The test limit for this parameter is 5A at TA = -55C.
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IDT54/74FCT521T/AT/BT/CT FAST CMOS 8-BIT IDENTITY COMPARATOR
MILITARY AND INDUSTRIAL TEMPERATURE RANGES
POWER SUPPLY CHARACTERISTICS
Symbol ICC ICCD Parameter Quiescent Power Supply Current TTL Inputs HIGH Dynamic Power Supply Current(4) 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 VIN = VCC VIN = GND Test Conditions(1) Min. -- -- Typ.(2) 0.5 0.15 Max. 2 0.25 Unit mA mA/ MHz
IC
Total Power Supply Current(6)
VIN = VCC VIN = GND VIN = 3.4V VIN = GND
-- --
1.5 1.8
3.5 4.5
mA
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, +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. Values for these conditions are examples of ICC formula. These limits are guaranteed but not tested. 6. 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 = Output Frequency Ni = Number of Outputs at fi All currents are in milliamps and all frequencies are in megahertz.
SWITCHING CHARACTERISTICS OVER OPERATING RANGE - INDUSTRIAL
Symbol tPLH tPHL tPLH tPHL Parameter Propagation Delay Ax or Bx to OA = B Propagation Delay IA = B to OA = B Condition(1) CL = 50pF RL = 500 FCT521AT Min.(2) Max. 1.5 7.2 1.5 6 FCT521CT Min.(2) Max. 1.5 4.5 1.5 4.1 Unit ns ns
SWITCHING CHARACTERISTICS OVER OPERATING RANGE - MILITARY
Symbol tPLH tPHL tPLH tPHL Parameter Propagation Delay Ax or Bx to OA = B Propagation Delay IA = B to OA = B Condition(1) CL = 50pF RL = 500 54FCT521T Min.(2) Max. 1.5 15 1.5 9 54FCT521AT Min.(2) Max. 1.5 9.5 1.5 7.8 54FCT521BT Min.(2) Max. 1.5 7.3 1.5 6 54FCT521CT Min.(2) Max. 1.5 5.1 1.5 4.5 Unit ns ns
NOTES: 1. See test circuit and waveforms. 2. Minimum limits are guaranteed but not tested on Propagation Delays.
4
IDT54/74FCT521T/AT/BT/CT FAST CMOS 8-BIT IDENTITY COMPARATOR
MILITARY AND INDUSTRIAL TEMPERATURE RANGES
TEST CIRCUITS AND WAVEFORMS
V CC 500 VIN Pulse Generator RT D.U.T . VOUT 7.0V
SWITCH POSITION
Test Open Drain Disable Low Enable Low All Other Tests Switch Closed Open
50pF CL
500
DEFINITIONS: CL = Load capacitance: includes jig and probe capacitance. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator.
Octal link
Test Circuits for All Outputs
DATA INPUT TIMING INPUT ASYNCHRONOUS CONTROL PRESET CLEAR ETC. SYNCHRONOUS CONTROL PRESET CLEAR CLOCK ENABLE ETC.
tSU
tH
tREM
3V 1.5V 0V 3V 1.5V 0V 3V 1.5V 0V 3V 1.5V 0V
Octal link
LOW-HIGH-LOW PULSE tW HIGH-LOW-HIGH PULSE
Octal link
1.5V
1.5V
tSU
tH
Pulse Width
Set-Up, Hold, and Release Times
ENABLE SAME PHASE INPUT TRANSITION tPLH OUTPUT tPLH OPPOSITE PHASE INPUT TRANSITION tPHL tPHL 3V 1.5V 0V VOH 1.5V VOL 3V 1.5V 0V
Octal link
DISABLE 3V 1.5V
CONTROL INPUT tPZL OUTPUT NORMALLY LOW OUTPUT NORMALLY HIGH SWITCH CLOSED tPZH SWITCH OPEN 3.5V 1.5V tPHZ 0.3V 1.5V 0V tPLZ
0V 3.5V 0.3V VOL VOH 0V
Octal link
Propagation Delay
Enable and Disable Times
NOTES: 1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH. 2. Pulse Generator for All Pulses: Rate 1.0MHz; tF 2.5ns; tR 2.5ns.
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IDT54/74FCT521T/AT/BT/CT FAST CMOS 8-BIT IDENTITY COMPARATOR
MILITARY AND INDUSTRIAL TEMPERATURE RANGES
ORDERING INFORMATION
XXXX IDT XX FCT Device Type Temp. Range XX Package X Process Blank B Industrial MIL-STD-883, Class B Industrial Options Small Outline IC Shrink Small Outline Package Quarter-size Small Outline Package Military Options CERDIP Leadless Chip Carrier
SO PY Q D L
521T 521AT 521BT 521CT 54 74
Fast CMOS 8-Bit Identity Comparator
- 55C to +125C - 40C to +85C
CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054
for SALES: 800-345-7015 or 408-727-6116 fax: 408-492-8674 www.idt.com
for Tech Support: logichelp@idt.com (408) 654-6459
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