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PI74FCT16540/162540/162H540T
PI74FCT16540T
16-BIT BUFFER/LINE DRIVERS
PI74FCT162540T
PI74FCT162H540T
Fast CMOS 16-Bit
Buffer/Line Drivers
Common Features
聲 PI74FCT16500T, PI74FCT162500T, and PI74FCT162H540T
are high-speed,
low power devices with high current drive
聲 V
CC
= 5V 鹵10%
聲 Hysteresis on all inputs
聲 Packages available
聳 48-pin 240 mil wide plastic TSSOP (A)
聳 48-pin 300 mil wide plastic SSOP (V)
PI74FCT16540T Features
聲 High output drive: I
OH
= 聳32 mA; I
OL
= 64 mA
聲 Power off disable outputs permit 聯(lián)live insertion聰
聲 Typical V
OLP
(Output Ground Bounce) < 1.0V
at V
CC
= 5V, T
A
= 25擄C
PI74FCT162540T Features
聲 Balanced output drivers: 鹵24 mA
聲 Reduced system switching noise
聲 Typical V
OLP
(Output Ground Bounce) < 0.6V
at V
CC
= 5V, T
A
= 25擄C
PI74FCT162H540T Features (Advance Information)
聲 Bus Hold retains last active bus state during 3-state
聲 Eliminates the need for external pull-up resistors
Product Features
Product Description
Pericom Semiconductor聮s PI74FCT series of logic circuits are pro-
duced in the Company聮s advanced 0.6 micron CMOS technology,
achieving industry leading speed grades.
The PI74FCT16540T, PI74FCT162540T, and PI74FCT162H540T are
inverting 16-bit buffer/line drivers designed for applications driving
high capacitance loads and low impedance backplanes. These high-
speed, low power devices offer bus/backplane interface capability
and a flow-through organization for ease of board layout. These
devices are designed with three-state controls to operate in a Quad-
Nibble, Dual-Byte, or a single 16-bit word mode.
The PI74FCT16540T output buffers are designed with a Power-Off
disable allowing "live insertion" of boards when used as backplane
drivers.
The PI74FCT162540T 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.
The PI74FCT162H540T has 聯(lián)Bus Hold聰 which retains the input's last
state whenever the input goes to high-impedance preventing
"floating" inputs and eliminating the need for pull-up/down resistors.
Logic Block Diagram
1
OE
A
1
OE
B
2
OE
A
2
OE
B
1
A
0
1
Y
0
2
A
0
2
Y
0
1
A
1
1
Y
1
2
A
1
2
Y
1
1
A
2
1
Y
2
2
A
2
2
Y
2
1
A
3
1
Y
3
2
A
3
2
Y
3
1
A
4
1
Y
4
2
A
4
2
Y
4
1
A
5
1
Y
5
2
A
5
2
Y
5
1
A
6
1
Y
6
2
A
6
2
Y
6
1
A
7
1
Y
7
2
A
7
2
Y
7
1
PS2036A 03/11/96
1
2
3
4
5
6
