PI74FCT162Q245T Datasheet, PDF (1/6 Pages) Pericom Semiconductor Corporation – Fast, Low Noise CMOS 16-Bit Bidirectional Transceivers

PI74FCT162Q245T
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PI74FCT162Q245T
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Product Features:
• VCC = 5V ±10%
Fast, Low Noise CMOS 16-Bit
Bidirectional Transceivers
• Balanced output drivers:
±12 mA
• Output impedance:
35Ω (typical)
• Typical VOLP (Output Ground Bounce) < 0.5V
at VCC = 5V, TA = 25°C
• Bus Hold retains last active bus state during tri-state
• Hysteresis on all inputs
• Packages available:
– 48-pin 240-mil wide plastic TSSOP (A48)
– 48-pin 300-mil wide plastic SSOP (V48)
– 48-pin 150-mil wide plastic BQSOP (B48)
• Device models available on request
Product Description:
Pericom Semiconductor’s PI74FCT series of logic circuits are pro-
duced in the Company’s 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 35Ω, eliminating the need for external
terminating resistors for most bus interface applications. This noise
suppression benefit is designated by the letter “Q” (for quiet) in the
part number.
Logic Block Diagram
The PI74FCT162Q245T also features “Bus Hold” which retains
the input’s last state whenever the input goes to high-impedance
preventing “floating” inputs and eliminating the need for pullup/
down resistors.
1DIR
1A0
1A1
1A2
1A3
1A4
1A5
1A6
1A7
1OE
1B0
1B1
1B2
1B3
1B4
1B5
1B6
1B7
2DIR
2A0
2A1
2A2
2A3
2A4
2A5
2A6
2A7
2OE
2B0
2B1
2B2
2B3
2B4
2B5
2B6
2B7
290
PS2050A 04/12/96