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PI74ALVCH16863
18-Bit Transceiver with 3-State Outputs
Product Features
路 PI74ALVCH16863 is designed for low voltage operation
路 V
CC
= 2.3V to 3.6V
路 Hysteresis on all inputs
路 Typical V
OLP
(Output Ground Bounce)
< 0.8V at V
CC
= 3.3V, T
A
= 25擄C
路 Typical V
OHV
(Output V
OH
Undershoot)
< 2.0V at V
CC
= 3.3V, T
A
= 25擄C
路 Bus Hold retains last active bus state during 3-State,
eliminating the need for external pullup resistors
路 Industrial operation at 聳40擄C to +85擄C
路 Packages available:
聳 56-pin 240 mil wide plastic TSSOP (A)
聳 56-pin 300 mil wide plastic SSOP (V)
Product Description
Pericom Semiconductor聮s PI74ALVCH series of logic circuits are
produced in the Company聮s advanced 0.5 micron CMOS technology,
achieving industry leading speed.
The PI74ALVCH16863 is an 18-bit noninverting transceiver designed
for synchronous communication between data buses. The control-
function implementation minimizes external timing requirements.
The PI74ALCH16863 can be used as two 9-bit transceivers or one 18-
bit transceiver.They allow data transmission from the A bus to the
B bus or from the B bus to the A bus, depending on the logic level
at the output-enable (OEAB or OEBA) inputs.
To ensure the high-impedance state during power up or power down,
OE should be tied to Vcc through a pull-up resistor; the minimum
value of the resistor is determined by the current-sinking capability
of the driver.
The PI74ALVCH16863 has 聯(lián)Bus Hold聰 which retains the data
input聮s last state whenever the data input goes to high-impedance
preventing 聯(lián)floating聰 inputs and eliminating the need for pullup/
down resistors.
Logic Block Diagram
1OEBA
1OEAB
56
1
2OEBA
2OEAB
29
28
1A1
55
2
1B1
2A1
41
16
2B1
To Eight Other Channels
To Eight Other Channels
1
PS8312
08/04/98
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2
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