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IDT74FCT645CLB

更新时间： 2025-08-31 22:17:59
品牌 Logo 应用领域
艾迪悌 - IDT /
页数 文件大小 规格书
7页 74K
描述
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS

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IDT74FCT645CLB 数据手册

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IDT54/74FCT245/A/C  
IDT54/74FCT640/A/C  
IDT54/74FCT645/A/C  
FAST CMOS OCTAL  
BIDIRECTIONAL  
TRANSCEIVERS  
Integrated Device Technology, Inc.  
FEATURES:  
• IDT54/74FCT245/640/645 equivalent to FAST speed  
and drive  
DESCRIPTION:  
The IDT octal bidirectional transceivers are built using an  
advanced dual metal CMOS technology. The IDT54/  
74FCT245/A/C,IDT54/74FCT640/A/CandIDT54/74FCT645/  
A/C are designed for asynchronous two-way communication  
between data buses. The transmit/receive (T/R) input deter-  
mines the direction of data flow through the bidirectional  
transceiver. Transmit (active HIGH) enables data from A  
ports to B ports, and receive (active LOW) from B ports to A  
ports. The output enable (OE) input, when HIGH, disables  
both A and B ports by placing them in High-Z condition.  
The IDT54/74FCT245/A/C and IDT54/74FCT645/A/C  
transceivers have non-inverting outputs. The IDT54/  
74FCT640/A/C has inverting outputs.  
• IDT54/74FCT245A/640A/645A 25% faster than FAST  
• IDT54/74FCT245C/640C/645C 40% faster than FAST  
• TTL input and output level compatible  
• CMOS output level compatible  
• IOL = 64mA (commercial) and 48mA (military)  
• Input current levels only 5µA max.  
• CMOS power levels (2.5mW typical static)  
• Direction control and over-riding 3-state control  
• Product available in Radiation Tolerant and Radiation  
Enhanced versions  
• Military product compliant to MIL-STD-883, Class B and  
DESC listed  
• Meets or exceeds JEDEC Standard 18 specifications  
FUNCTIONAL BLOCK DIAGRAM  
PIN CONFIGURATIONS  
1
2
20  
19  
18  
17  
16  
15  
T/R  
T/R  
A0  
A1  
A2  
A3  
A4  
A5  
A6  
A7  
Vcc  
OE  
B0  
B1  
B2  
B3  
B4  
B5  
B6  
B7  
3
OE  
P20-1  
D20-1  
SO20-2  
&
4
A
A
A
A
A
A
A
A
0
1
2
3
4
5
6
7
5
6
B
B
B
B
B
B
B
0
1
2
3
4
5
6
7
E20-1 14  
13  
12  
11  
8
9
10  
GND  
DIP/SOIC/CERPACK  
TOP VIEW  
INDEX  
3
2
20 19  
18  
A2  
A3  
A4  
A5  
A6  
4
5
6
7
8
B0  
B1  
B2  
B3  
B4  
1
17  
16  
15  
14  
L20-2  
10 11 12 13  
9
B7  
2534 drw 01  
LCC  
TOP VIEW  
2534 drw 02  
NOTES:  
1. FCT245, 645 are noninverting options.  
2. FCT640 is the inverting option.  
The IDT logo is a registered trademark of Integrated Device Technology, Inc.  
FAST is a registered trademark of National Semiconductor Co.  
MILITARY AND COMMERCIAL TEMPERATURE RANGES  
MAY 1992  
1992 Integrated Device Technology, Inc.  
7.9  
DSC-4201/3  
1
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