PI74FCT16P50I17/146F25C01T/11662H505011TT
18-BIT REGISTEPRIE7D4TFRCATNS1C6E2I5V0E1RTS
PI74FCT162H501T
Fast CMOS 18-Bit
Registered Transceivers
ProductFeatures
CommonFeatures:
ProductDescription
Pericom Semiconductors PI74FCT series of logic circuits are pro-
duced in the Companys advanced 0.6 micron CMOS technology,
achieving industry leading speed grades.
PI74FCT16501T,PI74FCT162501T,andPI74FCT162H501T
are high-speed,
low power devices with high current drive.
ThePI74FCT16501T,PI74FCT162501T,andPI74FCT162H501Tare
18-bit registered bus transceivers designed with D-type latches and
flip-flops to allow data flow in transparent, latched, and clocked
modes.TheOutputEnable(OEABandOEBA,LatchEnable(LEAB
andLEBA)andClock(CLKABandCLKBA)inputscontrolthedata
flowineachdirection.WhenLEABisHIGH,thedeviceoperatesin
transparentmodeforA-to-Bdataflow. WhenLEABisLOW,theA
dataislatchedifCLKABisheldataHIGHorLOWlogiclevel. The
A bus data is stored in the latch/flip-flop on the LOW-to-HIGH
transitionofCLKAB,ifLEABisLOW.OEABperformstheoutput
enablefunctionontheBport. DataflowfromBporttoAportissimilar
using OEBA, LEBA and CLKBA. These high-speed, low power
devices offer a flow-through organization for ease of board layout.
VCC =5V±10%
Hysteresis on all inputs
Packages available
56-pin240milwideplasticTSSOP(A)
56-pin300milwideplasticSSOP(V)
PI74FCT16501TFeatures
High output drive: IOH = 32 mA; IOL = 64 mA
Power off disable outputs permit live insertion
Typical VOLP (Output Ground Bounce) < 1.0V
atVCC =5V,TA =25°C
ThePI74FCT16501ToutputbuffersaredesignedwithaPower-Off
disable allowing "live insertion" of boards when used as backplane
drivers.
PI74FCT162501TFeatures
Balanced output drivers: ±24 mA
Reduced system switching noise
The PI74FCT162501T has ±24 mA balanced output drivers. It is
designed with current limiting resistors at its outputs to control the
output edge rate resulting in lower ground bounce and undershoot.
This eliminates the need for external terminating resistors for most
interface applications.
Typical VOLP (Output Ground Bounce) < 0.6V
atVCC =5V,TA =25°C
PI74FCT162H501TFeatures
Bus Hold retains last active bus state during 3-state
Eliminates the need for external pull-up resistors
The PI74FCT162H501T has Bus Hold which retains the inputs
last state whenever the input goes to high-impedance preventing
floatinginputsandeliminatingtheneedforpull-up/downresistors.
Logic Block Diagram
OEAB
CLKBA
LEBA
OEBA
CLKAB
LEAB
C
C
B1
A1
D
D
C
D
C
D
TO 17 OTHER CHANNELS
PS2035A 03/11/96
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