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74FCT521ATQG

P1-P3P4-P6
INDUSTRIAL TEMPERATURE RANGE
IDT74FCT521AT/CT
FAST CMOS 8-BIT IDENTITY COMPARATOR
1
NOVEMBER 2016INDUSTRIAL TEMPERATURE RANGE
IDT and the IDT logo are registered trademarks of Integrated Device Technology, Inc.
© 2016 Integrated Device Technology, Inc. DSC-2572/14
FEATURES:
• A and C grades
• Low input and output leakage
≤≤
≤≤
≤1µA (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
• Power off disable outputs permit "live insertion"
• Available in SOIC and QSOP packages
FUNCTIONAL BLOCK DIAGRAM
IDT74FCT521AT/CT
FAST CMOS 8-BIT
IDENTITY COMPARATOR
DESCRIPTION:
The IDT74FCT521T 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.
A
0
B
0
A
1
B
1
A
2
B
2
A
3
B
3
A
4
B
4
A
5
B
5
A
6
B
6
A
7
B
7
I
A=B
O
A=B
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
18
1
19
INDUSTRIAL TEMPERATURE RANGE
2
IDT74FCT521AT/CT
FAST CMOS 8-BIT IDENTITY COMPARATOR
PIN CONFIGURATION
Symbol Description Max Unit
VTERM
(2)
Terminal Voltage with Respect to GND –0.5 to +7 V
VTERM
(3)
Terminal Voltage with Respect to GND –0.5 to VCC+0.5 V
TSTG Storage Temperature –65 to +150 °C
I
OUT DC Output Current –60 to +120 mA
ABSOLUTE MAXIMUM RATINGS
(1)
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.
Pin Names Description
A0 - A7 Word A Inputs
B0 - B7 Word B Inputs
IA = B Expansion or Enable Input (Active LOW)
O
A = B Identity Output (Active LOW)
PIN DESCRIPTION
Symbol Parameter
(1)
Conditions Typ. Max. Unit
CIN Input Capacitance VIN = 0V 6 10 pF
C
OUT Output Capacitance VOUT = 0V 8 12 pF
CAPACITANCE (TA = +25°C, F = 1.0MHz)
NOTE:
1. This parameter is measured at characterization but not tested.
FUNCTION TABLE
(1)
Inputs Output
IA = B A, B OA = B
L A = B* L
LA
≠≠
≠≠
≠
BH
H A = B* H
HA
≠≠
≠≠
≠
BH
TOP VIEW
2
3
1
16
15
14
11
19
18
20
17
13
12
5
6
7
4
8
9
10
A1
A0
B0
VCC
B1
A3
A2
B2
B3
GND
O
A=B
B6
B7
A7
A6
B4
B5
A5
A4
IA=B
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
*A0 = B0, A1 = B1, A2 = B2, etc.
Package Type Package Code Order Code
QSOP PCG20 QG
SOIC PSG20 SOG
INDUSTRIAL TEMPERATURE RANGE
IDT74FCT521AT/CT
FAST CMOS 8-BIT IDENTITY COMPARATOR
3
Symbol Parameter Test Conditions
(1)
Min. Typ.
(2)
Max. Unit
VIH Input HIGH Level Guaranteed Logic HIGH Level 2 — — V
VIL Input LOW Level Guaranteed Logic LOW Level — — 0.8 V
IIH Input HIGH Current
(4)
VCC = Max. VI = 2.7V — — ±1µA
IIL Input LOW Current
(4)
VCC = Max. VI = 0.5V — — ±1
II Input HIGH Current
(4)
VCC = Max., VI = VCC (Max.) — — ±1µA
VIK Clamp Diode Voltage VCC = Min., IIN = –18mA — –0.7 –1.2 V
IOS Short Circuit Current VCC = Max., VO = GND
(3)
–60 –120 –225 mA
V
OH Output HIGH Voltage VCC = Min IOH = –8mA 2.4 3.3 — V
VIN = VIH or VIL IOH = –15mA 2 3 —
VOL Output LOW Voltage VCC = Min IOL = 48mA — 0.3 0.5 V
VIN = VIH or VIL
VH Input Hysteresis — — 200 — mV
I
CC Quiescent Power Supply Current VCC = Max. — 0.01 1 mA
VIN = GND or VCC
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: TA = –40°C to +85°C, VCC = 5.0V ±5%
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, +25°C 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 ±5µA at TA = –55°C.
P1-P3P4-P6

74FCT521ATQG

Mfr. #:
Buy 74FCT521ATQG
Manufacturer:
IDT
Description:
Logic Comparators 8-Bit Identity Comparator
Lifecycle:
New from this manufacturer.
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