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IDT74FCT645CTL PDF预览

IDT74FCT645CTL

更新时间: 2024-09-27 23:11:47
品牌 Logo 应用领域
艾迪悌 - IDT /
页数 文件大小 规格书
8页 161K
描述
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS

IDT74FCT645CTL 数据手册

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IDT54/74FCT245T/AT/CT/DT - 2245T/AT/CT  
IDT54/74FCT640T/AT/CT  
FAST CMOS OCTAL  
BIDIRECTIONAL  
TRANSCEIVERS  
IDT54/74FCT645T/AT/CT/DT  
Integrated Device Technology, Inc.  
FEATURES:  
• Common features:  
DESCRIPTION:  
The IDT octal bidirectional transceivers are built using an  
advanced dual metal CMOS technology. The FCT245T/  
FCT2245T, FCT640T and FCT645T are designed for asyn-  
chronous two-way communication between data buses. The  
transmit/receive (T/R) input determines 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.  
TheFCT245T/FCT2245TandFCT645Ttransceivershave  
non-inverting outputs. The FCT640T has inverting outputs.  
The FCT2245T has balanced drive outputs with current  
limiting resistors. This offers low ground bounce, minimal  
undershootandcontrolledoutputfalltimes-reducingtheneed  
for external series terminating resistors. The FCT2xxxT parts  
are plug-in replacements for FCTxxxT parts.  
– Low input and output leakage 1µA (max.)  
– CMOS power levels  
– True TTL input and output compatibility  
– VOH = 3.3V (typ.)  
– VOL = 0.3V (typ.)  
– 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  
• Features for FCT245T/FCT640T/FCT645T:  
– Std., A, C and D speed grades  
– High drive outputs (-15mA IOH, 64mA IOL)  
• Features for FCT2245T:  
– Std., A and C speed grades  
– Resistor outputs (-15mA IOH, 12mA IOL Com.)  
(-12mA IOH, 12mA IOL Mil.)  
– Reduced system switching noise  
PIN CONFIGURATIONS  
FUNCTIONAL BLOCK DIAGRAM  
1
2
20  
19  
18  
T/R  
A0  
A1  
A2  
A3  
A4  
A5  
A6  
A7  
Vcc  
OE  
B0  
B1  
B2  
B3  
B4  
B5  
B6  
B7  
T/R  
3
P20-1  
OE  
D20-1 17  
4
A
A
A
A
A
A
A
A
0
1
2
3
4
5
6
7
SO20-2  
5
16  
SO20-7*  
15  
6
B
B
B
B
B
B
B
0
1
2
3
4
5
6
SO20-8**  
7
14  
&
E20-1 13  
8
9
12  
11  
10  
GND  
2539 drw 02  
DIP/SOIC/SSOP/QSOP/CERPACK  
TOP VIEW  
*FCT245T/2245T, FCT645T only.  
**FCT245T/2245T, FCT640T  
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  
2539 drw 03  
FCT245T/2245T, FCT645T are non-inverting options.  
FCT640T is the inverting options.  
LCC  
2539 drw 01  
TOP VIEW  
The IDT logo is a registered trademark of Integrated Device Technology, Inc.  
MILITARY AND COMMERCIAL TEMPERATURE RANGES  
AUGUST 1995  
1995 Integrated Device Technology, Inc.  
6.9  
DSC-4611/4  
1

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