PI74FCT16244T
PI74FCT162244T
PI74FCT162H244T 1122334455667788990011223344556677889900112233445566778899001122112233445566778899001122334455667788990011223344556677889900112211223344556677889900112233445566778899001122334455667788990011221122334455667788990011223344556677889900112233445566778899001122112233445566778899001122
Fast CMOS 16-Bit Buffer/Line Drivers
Product Features
Common Features
• PI74FCT16244T,PI74FCT162244TandPI74FCT162H244T
are high-speed, low-power devices with high-current drive
VCC = 5V ±10%
• Hysteresis on all inputs
• Packages available:
– 48-pin 240 mil wide plastic TSSOP (A)
– 48-pin 300 mil wide plastic SSOP (V)
– 48-pin 173 mil wide plastic TVSOP (K)
• Device models available upon request
PI74FCT16244T Features
• High output drive: IOH = –32mA; IOL = 64mA
• Power off disable outputs permit "live insertion"
• Typical VOLP (Output Ground Bounce)
< 1.0V at VCC = 5V, TA = 25°C
PI74FCT162244T Features
• Balanced output drivers: ±24mA
• Reduced system switching noise
• Typical VOLP (Output Ground Bounce)
< 0.6V at VCC = 5V, TA = 25°C
PI74FCT162H244T Features
• Bus Hold retains last active bus state during 3-State
• Eliminates the need for external pull-up resistors
Product Description
Pericom Semiconductor’s PI74FCT series of logic circuits are
produced using the Company’s advanced 0.6 micron CMOS
technology, achieving industry leading speed grades.
PI74FCT16244T, PI74FCT162244T, and PI74FCT162H244T are
non-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 PI74FCT16244T output buffers are designed with a Power-
Off disable allowing “live insertion” of boards when used as
backplane drivers.
The PI74FCT162244T has ±24mA 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 PI74FCT162H244T has “Bus Hold” 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
PS2031D 05/17/99