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Part: IDT74FCT521CTD
Category:
Logic
-> Bus Interface
-> CMOS/BiCMOS->FCT/FCT-T Family
Description: Fast CMOS 8-bit Identity Comparator
Company: Integrated Device Technology, Inc.
Datasheet: Download IDT74FCT521CTD datasheet File size : 843 kB
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Datasheet text preview:
IDT54/74FCT521T/AT/BT/CT FAST CMOS 8-BIT IDENTITY COMPARATOR
MILITARY AND COMMERCIAL TEMPERATURE RANGES
FAST CMOS 8-BIT IDT54/74FCT521T/AT/BT/CT IDENTITY COMPARATOR
FEATURES:
- - - - - - - - - - Std., A, B and C speed grades Low input and output leakage 1µ A (max.) Extended commercial range of 40°C to +85°C 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 Product available in Radiation Tolerant and Radiation Enhanced versions Military product compliant to MIL-STD-883, Class B and DESC listed (dual marked) Available in DIP, SOIC, SSOP, QSOP, CERPACK and LCC packages
DESCRIPTION:
The IDT54/74FCT521T/AT/BT/CT 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
A0 B0 A1 B1 A2 B2 A3 B3 A4 B4 A5 B5 A6 B6 A7 B7
2 3
4 5
6 7
8 9
19
11 12
OA=B
13 14
15 16
17 18 1
IA = B
MILITARY AND COMMERCIAL TEMPERATURE RANGES
1
c 1999 Integrated Device Technology, Inc.
AUGUST 1999
DSC-2572/6
IDT54/74FCT521T/AT/BT/CT FAST CMOS 8-BIT IDENTITY COMPARATOR
MILITARY AND COMMERCIAL TEMPERATURE RANGES
PIN CONFIGURATION
B0 A0
IA = B A0 B0 A1 B1 A2 B2 A3 B3 GND 1 2 3 4 5 6 7 8 9 10
P 2 0 -1 D 2 0 -1 S O 2 0 -2 S O 2 0 -7 S O 2 0 -8 E 2 0 -1
20 19 18 17 16 15 14 13 12 11
VCC O A=B B7 A7 B6 A6 B5 A5 B4
IN D E X
3
2 1
20
VCC
IA = B
19 18 17
A1 B1 A2 B2 A3
O A=B
4 5 6 7 8 9 10
B7 A7 B6 A6 B5
L 2 0 -2
16 15 14
11
12
13
B3
A4
B4
A4
DIP/ SOIC/ SSOP/ QSOP/ CERPACK TOP VIEW
LCC TOP VIEW
ABSOLUTE MAXIMUM RATINGS(1)
Symbol VTERM(2) VTERM(3) TSTG IOUT Rating Terminal Voltage with Respect to GND Terminal Voltage with Respect to GND Storage Temperature DC Output Current Max. 0.5 to +7 0.5 to VCC+0.5 65 to +150 65 to +120 Unit V V °C mA
8T-link
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. Outputs and I/O terminals only.
FUNCTION TABLE(1)
Inputs IA=B L L H H
NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level
GND
A5
Output A, B A = B* AB A = B* AB OA=B L H H H
CAPACITANCE (TA = +25OC, 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
8T-link
*A0 = B0, A1 = B1, A2 = B2, etc.
NOTE: 1. This parameter is measured at characterization but not tested.
2
IDT54/74FCT521T/AT/BT/CT FAST CMOS 8-BIT IDENTITY COMPARATOR
MILITARY AND COMMERCIAL TEMPERATURE RANGES
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified: Commercial: TA = -40°C to +85°C, VCC = 5.0V ± 5%; Military: TA = 55°C to +125°C, 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., IN = 18mA VCC = Max.(3), VO = GND VCC = Min. VIN = VIH or VIL IOH = 6mA MIL IOH = 8mA COM'L IOH = 12mA MIL IOH = 15mA COM'L IOL = 32mA MIL IOL = 48mA COM'L
--
Min. 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
Unit V V µA µA µA V mA V V V mV mA
VI = 2.7V VI = 0.5V
-- -- -- -- 60 2.4 2 -- -- --
VOL VH ICC
Output LOW Voltage Input Hysteresis Quiescent Power Supply Current
VCC = Min. VIN = VIH or VIL VCC = Max. VIN = GND or VCC
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, +25°C ambient. 3. Not more than one output should be shorted at one time. Duration of the short circuit test should not exceed one second. 4. The test limit for this parameter is ±5µA at TA = -55°C.
3
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