IDT74FCT521CTLG [IDT]
Identity Comparator, FCT Series, 8-Bit, Inverted Output, CMOS, CQCC20, LCC-20;
| 型号： | IDT74FCT521CTLG |
| 厂家： | 
INTEGRATED DEVICE TECHNOLOGY |
| 描述： | Identity Comparator, FCT Series, 8-Bit, Inverted Output, CMOS, CQCC20, LCC-20 逻辑集成电路 |
| 文件： | 总6页 (文件大小：139K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
FAST CMOS 8-BIT
IDENTITY COMPARATOR
IDT54/74FCT521T/AT/BT/CT
DESCRIPTION:
FEATURES:
−
−
−
−
−
Std., A, B and C speed grades
The IDT54/74FCT521T/AT/BT/CTare 8-bitidentitycomparators built
usinganadvanceddualmetalCMOStechnology.Thesedevicescompare
two words of up to eight bits each and provide a low output when the two
words matchbitforbit.The expansioninputIA =Balsoserves as anactive
lowenable input.
Low input and output leakage ≤1µA (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
FUNCTIONALBLOCKDIAGRAM
2
A0
3
B0
4
A1
5
B1
6
A2
7
B2
8
A3
9
B3
19
OA=B
11
A4
12
B4
13
A5
14
B5
15
A6
16
B6
17
A7
18
B7
1
IA=B
MILITARY AND COMMERCIAL TEMPERATURE RANGES
AUGUST 1999
1
c
1999 Integrated Device Technology, Inc.
DSC-2572/6
IDT54/74FCT521T/AT/BT/CT
FASTCMOS8-BITIDENTITYCOMPARATOR
MILITARYANDCOMMERCIALTEMPERATURERANGES
PINCONFIGURATION
20
19
18
17
16
15
1
IA=B
VCC
OA=B
B7
INDEX
2
3
4
A0
B0
A1
B1
3
2
20 19
1
4
5
6
7
8
18
17
16
15
14
A1
B1
B7
A7
B6
A6
B5
A7
P20-1
D20-1
SO20-2
SO20-7
B6
5
L20-2
A2
B2
A3
A6
A2
B2
A3
6
SO20-8 14
B5
A5
B4
A4
7
E20-1
13
12
11
8
9
10
11 12 13
9
B3
GND
10
LCC
TOP VIEW
DIP/ SOIC/ SSOP/ QSOP/ CERPACK
TOP VIEW
ABSOLUTE MAXIMUM RATINGS(1)
PIN DESCRIPTION
Pin Names
Description
Symbol
Rating
Max.
Unit
A0 - A7
B0 - B7
IA = B
Word A Inputs
Word B Inputs
(2)
VTERM
Terminal Voltage with Respect to GND
–0.5 to +7
V
(3)
VTERM
Terminal Voltage with Respect to GND –0.5 to VCC+0.5
V
Expansion or Enable Input (Active LOW)
Identity Output (Active LOW)
TSTG
IOUT
Storage Temperature
DC Output Current
–65 to +150
–65 to +120
°C
OA = B
mA
8T-link
NOTES:
FUNCTION TABLE(1)
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
Inputs
Output
IA=B
A, B
OA=B
L
L
H
H
A = B*
A ≠ B
A = B*
A ≠ B
L
H
H
H
rating conditions for extended periods may affect reliability.
terminal voltage may exceed Vcc by +0.5V unless otherwise noted.
No
2. Inputs and Vcc terminals only.
3. Outputs and I/O terminals only.
NOTE:
1. H = HIGH Voltage Level
O
L = LOW Voltage Level
CAPACITANCE
(TA = +25 C, f = 1.0MHz)
*A0 = B0, A1 = B1, A2 = B2, etc.
Symbol
Parameter(1)
Conditions
Typ.
Max. Unit
CIN
Input Capacitance
VIN = 0V
6
10
12
pF
COUT
Output Capacitance
VOUT = 0V
8
pF
8T-link
NOTE:
1. This parameter is measured at characterization but not tested.
2
IDT54/74FCT521T/AT/BT/CT
FASTCMOS8-BITIDENTITYCOMPARATOR
MILITARYANDCOMMERCIALTEMPERATURERANGES
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
Parameter
Input HIGH Level
Test Conditions(1)
Guaranteed Logic HIGH Level
Min.
2
Typ.(2) Max.
Unit
V
—
—
—
0.8
±1
Input LOW Level
Guaranteed Logic LOW Level
VCC = Max.
—
—
—
—
—
–60
2.4
V
IIH
Input HIGH Current(4)
Input LOW Current(4)
Input HIGH Current(4)
Clamp Diode Voltage
Short Circuit Current
Output HIGH Voltage
VI = 2.7V
VI = 0.5V
—
µA
µA
µA
V
IIL
VCC = Max.
—
±1
II
VCC = Max., VI = VCC (Max.)
VCC = Min., IN = –18mA
VCC = Max.(3), VO = GND
—
±1
VIK
IOS
–0.7
–120
3.3
–1.2
–225
—
mA
V
VOH
VCC = Min.
IOH = –6mA MIL
VIN = VIH or VIL
IOH = –8mA COM'L
IOH = –12mA MIL
IOH = –15mA COM'L
IOL = 32mA MIL
2
3
—
V
V
VOL
Output LOW Voltage
VCC = Min.
—
0.3
0.5
VIN = VIH or VIL
IOL = 48mA COM'L
VH
ICC
Input Hysteresis
—
—
200
—
1
mV
mA
—
Quiescent Power Supply Current
VCC = Max.
0.01
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
IDT54/74FCT521T/AT/BT/CT
FASTCMOS8-BITIDENTITYCOMPARATOR
MILITARYANDCOMMERCIALTEMPERATURERANGES
POWER SUPPLY CHARACTERISTICS
Symbol
Parameter
Test Conditions(1)
Min.
Typ.(2) Max.
Unit
Quiescent Power Supply
Current TTL
VCC = Max.
VIN = 3.4V
∆ICC
—
0.5
2
mA
(3)
Inputs HIGH
ICCD
Dynamic Power Supply Current(4)
VCC = Max.
VIN = VCC
—
0.15
0.25
mA/
Outputs Open
One Input Toggling
50% Duty Cycle
VIN = GND
MHz
IC
Total Power Supply Current(5)
VCC = Max.
V
IN
= V
—
—
1.5
1.8
3.5
4.5
mA
CC
Outputs Open
fi = 10MHz
One Bit Toggling
50% Duty Cycle
VIN = GND
VIN = 3.4V
VIN = GND
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. 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 the 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 = Input Frequency
Ni = Number of Inputs at fi
All currents are in milliamps and all frequencies are in megahertz.
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
IDT54/74FCT521T
IDT54/74FCT521AT
IDT54/74FCT521BT
IDT54/74FCT521CT
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
tPLH
tPHL
Propagation Delay
An or Bn to OA = B
CL = 50pF
1.5 11 1.5 15 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
RL = 500Ω
tPLH
Propagation Delay
1.5 10 1.5
9
1.5
6
1.5 7.8 1.5 4.6 1.5
6
1.5 4.1 1.5 4.5 ns
tPHL I = B to O = B
A
A
NOTES:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
4
IDT54/74FCT521T/AT/BT/CT
FASTCMOS8-BITIDENTITYCOMPARATOR
MILITARYANDCOMMERCIALTEMPERATURERANGES
TESTCIRCUITSANDWAVEFORMS
SWITCH POSITION
TEST CIRCUITS FOR ALL OUTPUTS
Test
Switch
Closed
Open
V CC
7.0V
Open Drain
Disable Low
Enable Low
All Other Tests
500Ω
500Ω
V OUT
VIN
Pulse
D.U.T.
Generator
8-link
50pF
DEFINITIONS:
T
R
L
C
CL = Load capacitance: includes jig and probe capacitance.
RT = Termination resistance: should be equal to ZOUT of the Pulse
Generator.
Octal link
PULSEWIDTH
SET-UP, HOLD, AND RELEASE TIMES
3V
1.5V
0V
DATA
INPUT
LOW-HIGH-LOW
tH
tSU
1.5V
PULSE
3V
1.5V
0V
TIMING
INPUT
tW
ASYNCHRONOUS CONTROL
tREM
PRESET
3V
CLEAR
ETC.
1.5V
0V
HIGH-LOW-HIGH
PULSE
1.5V
SYNCHRONOUS CONTROL
PRESET
3V
1.5V
0V
Octal link
CLEAR
CLOCK ENABLE
ETC.
tSU
tH
Octal link
PROPAGATIONDELAY
ENABLEANDDISABLETIMES
ENABLE
DISABLE
3V
3V
SAME PHASE
INPUT TRANSITION
1.5V
0V
CONTROL
INPUT
1.5V
0V
tPLH
tPHL
tPHL
tPZL
tPLZ
VOH
OUTPUT
3.5V
1.5V
3.5V
VOL
1.5V
VOL
OUTPUT
NORMALLY
LOW
SWITCH
CLOSED
tPLH
0.3V
0.3V
3V
tPZH
tPHZ
OPPOSITE PHASE
INPUT TRANSITION
1.5V
0V
VOH
OUTPUT
NORMALLY
HIGH
SWITCH
OPEN
1.5V
0V
Octal link
0V
Octal link
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
5
IDT54/74FCT521T/AT/BT/CT
FASTCMOS8-BITIDENTITYCOMPARATOR
MILITARYANDCOMMERCIALTEMPERATURERANGES
ORDERINGINFORMATION
IDT
XX
FCT
XXXX
X
X
Temp. Range
Device Type
Package
Process
Blank
Commercial
B
MIL-STD-883, Class B
P
Plastic DIP (P20-1)
D
CERDIP (D20-1)
E
CERPACK (E20-1)
L
Leadless Chip Carrier (L20-2)
Small Outline IC (SO20-2)
Shrink Small Outline Package (SO20-7)
Quarter-size Small Outline Package (SO20-8)
SO
PY
Q
521T
8-Bit Identity Comparator
521AT
521BT
521CT
54
74
- 55°C to +125°C
- 40°C to +85°C
CORPORATE HEADQUARTERS
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www.idt.com*
*To search for sales office near you, please click the sales button found on our home page or dial the 800# above and press 2.
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
6
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