21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT162Q245T
LOW NOISE 16-BIT BIDIRECTIONAL TRANSCEIVERS
PI74FCT162Q245T
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
Product Features:
鈥?V
CC
= 5V 鹵10%
鈥?Balanced output drivers:
鹵12 mA
鈥?Output impedance:
35鈩?(typical)
鈥?Typical V
OLP
(Output Ground Bounce) < 0.5V
at V
CC
= 5V, T
A
= 25擄C
鈥?Bus Hold retains last active bus state during tri-state
鈥?Hysteresis on all inputs
鈥?Packages available:
鈥?48-pin 240-mil wide plastic TSSOP (A48)
鈥?48-pin 300-mil wide plastic SSOP (V48)
鈥?48-pin 150-mil wide plastic BQSOP (B48)
鈥?Device models available on request
Fast, Low Noise CMOS 16-Bit
Bidirectional Transceivers
Product Description:
Pericom Semiconductor鈥檚 PI74FCT series of logic circuits are pro-
duced in the Company鈥檚 advanced 0.6 micron CMOS technology,
achieving industry leading speed grades.
The PI74FCT162Q245T is a 16-bit bidirectional transceiver designed
for asynchronous two-way communication between data buses.
The direction control input pin (xDIR) determines the direction of
data flow through the bidirectional transceiver. The Direction and
Output Enable controls are designed to operate these devices as
either two independent 8-bit transceivers or one 16-bit transceiver.
The output enable (OE) input, when HIGH, disables both A and B
ports by placing them in HIGH Z condition.
The PI74FCT162Q245T is designed with current limiting resistors
at its outputs to control the output edge rate resulting in lower
ground bounce and undershoot. This device features a typical
output impedance of 35鈩? eliminating the need for external
terminating resistors for most bus interface applications. This noise
suppression benefit is designated by the letter 鈥淨鈥?(for quiet) in the
part number.
The PI74FCT162Q245T also features 鈥淏us Hold鈥?which retains
the input鈥檚 last state whenever the input goes to high-impedance
preventing 鈥渇loating鈥?inputs and eliminating the need for pullup/
down resistors.
Logic Block Diagram
1
DIR
2
DIR
1
OE
2
OE
1
A
0
1
B
0
1
A
1
1
B
1
1
A
2
1
B
2
1
A
3
1
B
3
1
A
4
1
B
4
1
A
5
1
B
5
1
A
6
1
B
6
1
A
7
1
B
7
2
A
0
2
B
0
2
A
1
2
B
1
2
A
2
2
B
2
2
A
3
2
B
3
2
A
4
2
B
4
2
A
5
2
B
5
2
A
6
2
B
6
2
A
7
2
B
7
290
PS2050A 04/12/96
PERICOM
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2
3
4
5
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