QS74FCT2521T 반도체 회로 부품 판매점
High Speed CMOS 8-Bit Identity Comparator
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 QUALITY |
Q
QSFCT521T, 2521T
HigHhigShpSepeedeCdMCOMSOS
Bu8s-EBxitchange
Identity SCwomitcphaersator
QS54/74QFCST3532813T
QS54/74QFCS3T22358231T
FEATURES/BENEFITS
• Pin and function compatible to the 74F521,
74FCT521, and 74ALS521
• CMOS power levels: <7.5 mW static
• Available in DIP, SOIC, QSOP, ZIP, HQSOP
• Undershoot clamp diodes on all inputs
• TTL-compatible input and output levels
• Ground bounce controlled outputs
• Reduced output swing of 0-3.5V
• Military product compliant to MIL-STD-883
FCT-T 521T
FCT-T 2521T
• JEDEC-FCT spec compatible
• Fastest CMOS logic family available
• Standard thru D speed grades; 3.9 ns tPD for D
• IOL = 48 mA Com., 32 mA Mil.
DESCRIPTION
• Built-in 25Ω series resistor outputs reduce
reflection and other system noise
• Standard thru D speed grades; 3.9 ns tPD for D
• IOL = 12 mA Com.
The QSFCT521 and QSFCT2521 are high-speed CMOS TTL-compatible 8-bit identity comparators. Two
words of up to eight bits are compared and a low output is provided when the words match. An expansion input
allows the comparison to be extended over multiple words. All inputs have clamp diodes for undershoot noise
suppression. All outputs have ground bounce suppression (see QSI Application Note AN-001).
FUNCTIONAL BLOCK DIAGRAM
A0
B0
A1
B1
A2
B2
A3
B3
A4
B4
A5
B5
A6
B6
A7
B7
IA = B
25Ω
(FCT2521 Only)
OA = B
MDSL-00019-02
QUALITY SEMICONDUCTOR, INC.
1
QSFCT521T, 2521T
PIN CONFIGURATIONS (All Pins Top View)
PDIP, SOIC, QSOP, HQSOP
lA=B
A0
B0
A1
B1
A2
B2
A3
B3
GND
1
2
3
4
5
6
7
8
9
10
20 VCC
19 OA=B
18 B7
17 A7
16 B6
15 A6
14 B5
13 A5
12 B4
11 A4
lA=B
B0
B1
B2
B3
A4
A5
A6
A7
OA=B
ZIP
1
2
3
4
56
7
8
9 10
11
12
13
14
15 16
17
18
19 20
A0
A1
A2
A3
GND
B4
B5
B6
B7
VCC
PIN DESCRIPTION
Name
A7-A0
B7-B0
IA = B
OA = B
I/O Description
I Word A
I Word B
I Expansion or Enable Input
O Compare Output
FUNCTION TABLE
Inputs
A7-A0, B7-B0
IA = B
A7-A0 = B7-B0
L
A7-A0 ≠ B7-B0
L
XH
Outputs
OA = B
L
H
H
Function
Compare
Equal
Compare
Not Equal
Expand Input
Not Valid
2
QUALITY SEMICONDUCTOR, INC.
MDSL-00019-02
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제조업체: QUALITY
( quality )
QS74FCT2521T cmos
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국내 전력반도체 판매점
상호 : 아이지 인터내셔날
전화번호 : 051-319-2877
[ 홈페이지 ]
IGBT, TR 모듈, SCR, 다이오드모듈, 각종 전력 휴즈
( IYXS, Powerex, Toshiba, Fuji, Bussmann, Eaton )
전력반도체 문의 : 010-3582-2743
