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PI74FCT162260ATA PDF预览

PI74FCT162260ATA

更新时间: 2024-10-27 23:27:39
品牌 Logo 应用领域
其他 - ETC 逻辑集成电路光电二极管
页数 文件大小 规格书
5页 310K
描述
Bus Exchanger

PI74FCT162260ATA 数据手册

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PI74FCT16260T  
PI74FCT162260T  
Fast CMOS 12-Bit Tri-Port  
Bus Exchanger  
Product Features  
Product Description  
Common Features  
PericomSemiconductor’sPI74FCTseriesoflogiccircuits  
are produced in the Company’s advanced 0.6 micron  
CMOStechnology,achievingindustryleadingspeedgrades.  
• PI74FCT16260 and PI74FCT162260 are high-speed,  
low power devices with high current drive.  
The FCT16260AT/CT and the FCT162260AT/CT Tri-  
Port Bus Exchangers are high-speed 12-bit latched bus  
multiplexers/ transceivers for use in high speed  
microprocessorapplications.TheseBusExchangerssupport  
memory interleaving with latched outputs on the B-ports  
and address multiplexing with latched inputs on the B-  
ports.  
• V = 5V ± 10%  
CC  
• Typical tsk (o) (Output Skew) < 250ps, clocked mode  
• Extended range of –40°C to +85°C  
• Hysteresis on all inputs  
PI74FCT16260T Features  
• High output drive: I = –32mA; I = 64mA  
OH  
OL  
The Tri-port Bus Exchanger has three 12-bit ports. Data  
may be transferred between the A-port and either/both of  
the B-ports.  
• Power off disable outputs permit “live insertion”  
• Typical V (Output Ground Bounce)  
OLP  
< 1.0V at V = 5V, T = 25°C  
CC  
A
The latch enable (LE1B, LE2B, LEA1B and LEA2B)  
inputs control data storage. When a latch-enable input is  
HIGH, thelatchistransparent. Whenthelatchenableinput  
isLOW, thedataattheinputislatchedandremainslatched  
until the latch enable input is returned HIGH. Independent  
output enables (OE1B and OE2B allow reading from one  
port while writing to the other port.  
PI74FCT162260T Features  
• Balanced output drive: I /I = 24mA  
OL OH  
• Typical V  
(Output Ground Bounce)  
OLP  
< 0.6V at V = 5V, T = 25°C  
CC  
A
• Series current limiting resistors  
• Packages available:  
The FCT16260AT/CT are ideally suited for driving high  
capacitance loads and low impedance backplanes. The  
outputbuffersaredesignedwithpoweroffdisablecapability  
to allow “live insertion” of boards when used as backplane  
drivers.  
– 56-pin 240 mil wide TSSOP (A56)  
– 56-pin 300 mil wide SSOP (V56)  
Logic Block Diagram  
The FCT162260AT/CT have balanced output drive with  
current limiting resistors. This offers low ground bounce,  
minimal undershoot, and controlled output fall times  
reducing the need for external series terminating resistors.  
PS8307A  
11/17/98  
1

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