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Número de pieza | IDT54FCT521CDB | |
Descripción | FAST CMOS 8-BIT IDENTITY COMPARATOR | |
Fabricantes | Integrated Device Technology | |
Logotipo | ||
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Integrated Device Technology, Inc.
FAST CMOS 8-BIT
IDENTITY COMPARATOR
IDT54/74FCT521
IDT54/74FCT521A
IDT54/74FCT521B
IDT54/74FCT521C
FEATURES:
• IDT54/74FCT521 equivalent to FASTTM 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
(5µA max.)
• 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
A0
B0
A1
B1
A2
B2
A3
B3
A4
B4
A5
B5
A6
B6
A7
B7
IA=B
PIN CONFIGURATIONS
OA=B
IA=B
A0
B0
A1
B1
A2
B2
A3
B3
GND
1 20
2 19
3 18
4 P20-1 17
5 D20-1 16
6 SO20-2 15
&
7 E20-1 14
8 13
9 12
10 11
VCC
OA=B
B7
A7
B6
A6
B5
A5
B4
A4
DIP/SOIC/CERPACK
TOP VIEW
2604 drw 01
INDEX
2604 drw 03
3 2 20 19
A1 4
1 18 B7
B1 5
17 A7
A2 6
L20-2
16 B6
B2 7
15 A6
A3 8
14 B5
9 10 11 12 13
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
FAST is a trademark of National Semiconductor Co.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
©1992 Integrated Device Technology, Inc.
7.16
LCC
TOP VIEW
2604 drw 02
MAY 1992
DSC-4617/2
1
1 page IDT54/74FCT521/A/B/C FAST CMOS
8-BIT IDENTITY COMPARATOR
TEST CIRCUITS AND WAVEFORMS
TEST CIRCUITS FOR ALL OUTPUTS
VCC 7.0V
VIN
Pulse
Generator
V OUT
D.U.T.
500Ω
50pF
500Ω
RT CL
MILITARY AND COMMERCIAL TEMPERATURE RANGES
SWITCH POSITION
Test
Switch
Open Drain
Disable Low
Enable Low
Closed
All Other Tests
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
TIMING
INPUT
ASYNCHRONOUS CONTROL
PRESET
CLEAR
ETC.
SYNCHRONOUS CONTROL
PRESET
CLEAR
CLOCK ENABLE
ETC.
t SU
t SU
tH
t REM
tH
PULSE WIDTH
3V
1.5V
0V
3V
1.5V
0V
LOW-HIGH-LOW
PULSE
3V
1.5V
0V
HIGH-LOW-HIGH
PULSE
3V
1.5V
0V
1.5V
tW
1.5V
PROPAGATION DELAY
SAME PHASE
INPUT TRANSITION
OUTPUT
OPPOSITE PHASE
INPUT TRANSITION
tPLH
t PLH
t PHL
tPHL
3V
1.5V
0V
VOH
1.5V
VOL
3V
1.5V
0V
ENABLE AND DISABLE TIMES
ENABLE
CONTROL
INPUT
OUTPUT
NORMALLY
LOW
t PZL
SWITCH
CLOSED
t PZH
OUTPUT SWITCH
NORMALLY OPEN
HIGH
3.5V
1.5V
1.5V
0V
DISABLE
tPLZ
3V
1.5V
0V
3.5V
t PHZ
0.3V V OL
0.3V V OH
0V
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 ≤ 50Ω; tF ≤ 2.5ns;
tR ≤ 2.5ns.
7.16 5
5 Page |
Páginas | Total 6 Páginas | |
PDF Descargar | [ Datasheet IDT54FCT521CDB.PDF ] |
Número de pieza | Descripción | Fabricantes |
IDT54FCT521CD | FAST CMOS 8-BIT IDENTITY COMPARATOR | Integrated Device Technology |
IDT54FCT521CDB | FAST CMOS 8-BIT IDENTITY COMPARATOR | Integrated Device Technology |
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