21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT162245MT
16-BIT BIDIRECTIONAL TRANSCEIVERS
PI74FCT162245MT
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
Fast CMOS 16-Bit
Heavy Load
Bidirectional Transceivers
Product Features:
鈥?Very high-speed bidirectional transceiver
for 150 pF heavy loads
鈥?16-bit switching in 5.5ns max
鈥?Vcc = 5V 鹵10%
鈥?Hysteresis on all inputs
鈥?Balanced output drivers: 鹵24 mA
鈥?Reduced system switching noise
鈥?Typical V
OLP
(Output Ground Bounce) < 0.6V
at V
CC
= 5V, T
A
= 25擄C
鈥?Packages available:
鈥?48-pin 240 mil wide plastic TSSOP (A)
鈥?48-pin 300 mil wide plastic SSOP (V)
鈥?Device models available on request
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 PI74FCT162245MT is a 16-bit bidirectional transceivers
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. It is
designed specifically for heavy load applications.
The PI74FCT162245MT has 鹵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.
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
1
PS2046A 03/12/96
1
2
3
4
5
