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PI74FCT2645ATS PDF预览

PI74FCT2645ATS

更新时间: 2024-10-31 23:27:47
品牌 Logo 应用领域
其他 - ETC 总线收发器
页数 文件大小 规格书
4页 221K
描述
Single 8-bit Bus Transceiver

PI74FCT2645ATS 数据手册

 浏览型号PI74FCT2645ATS的Datasheet PDF文件第2页浏览型号PI74FCT2645ATS的Datasheet PDF文件第3页浏览型号PI74FCT2645ATS的Datasheet PDF文件第4页 
Fast CMOS Octal  
Bidirectional Transceivers  
ProductFeatures  
ProductDescription  
• PI74FCT245/640/645TandPI74FCT2245/2640T/2645Tarepin  
compatible with bipolar FAST™ Series at a higher speed and  
lower power consumption  
• 25 Ohm series resistor on all outputs (FCT2XXX only)  
• TTL input and output levels  
Pericom Semiconductor’s PI74FCT series of logic circuits are  
produced using the Company’s advanced 0.6/0.8 micron CMOS  
technology, achieving industry leading speed grades. All  
PI74FCT2XXXdeviceshaveabuilt-in25Ohmseriesresistoronall  
outputs to reduce noise because of reflections, thus eliminating the  
need for an external terminating resistor.  
• Low ground bounce outputs  
• Extremelylowstaticpower  
• Hysteresis on all inputs  
• Industrial operating temperature range: –40°C to +85°C  
• Packagesavailable:  
– 20-pin173milwideplasticTSSOP(L)  
– 20-pin300milwideplasticDIP(P)  
– 20-pin150milwideplasticQSOP(Q)  
– 20-pin150milwideplasticTQSOP(R)  
– 20-pin300milwideplasticSOIC(S)  
– 20-pin209milwideplasticSSOP(H)  
• Device models available on request  
ThePI74FCT245T/640T/645TandPI74FCT2245T/2640T/2645Tare  
8-bit wide octal buffer bidirectional transceivers designed for  
asynchronous two-way communication between data buses. The  
transmit/receive (T/R) input determines the direction of data flow  
throughthebidirectionaltransceiver.Transmit(activeHIGH)enables  
datafromAportstoBports, andreceive(activeLOW)fromBports  
toAports.Theoutputenable(OE)input,whenHIGH,disablesboth  
A and B ports by placing them in HIGH Z condition.  
ProductPinConfiguration  
T/R  
1
2
3
4
5
6
7
8
9
10  
20 Vcc  
19 OE  
A0  
A1  
A2  
A3  
A4  
A5  
A6  
A7  
LogicBlockDiagram  
B0  
B1  
B2  
B3  
B4  
B5  
B6  
B7  
18  
17  
16  
15  
14  
13  
12  
11  
20-Pin  
L,P,Q  
R,S,H  
T/R  
OE  
A0  
B0  
A1  
B1  
A2  
GND  
ProductPinDescription  
PinName  
OE  
Description  
3-State Output Enable Inputs (Active LOW)  
Transmit/ReceiveInput  
Side A Inputs or 3-State Outputs  
Side B Inputs or 3-State Outputs  
Ground  
B2  
T/R  
A3  
A0-A7  
B0-B7  
GND  
B3  
A4  
B4  
V
CC  
Power  
A5  
(1)  
TruthTable  
B5  
Inputs  
A6  
OE  
L
T/R  
Outputs  
(2)  
L
H
X
Bus B Data to Bus A  
B6  
(2)  
L
Bus A Data to Bus B  
A7  
H
High Z State  
B7  
1. H = High Voltage Level, X = Don't Care, L = Low  
Voltage Level, Z = High Impedance  
2. 640 is inverting from input to output.  
FCT245, 2245, 645, 2645 are non-inverting options.  
FCT640 & FCT2640 are inverting options.  
PS2012B  
09/22/99  
1

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