PI74FCT162245 Datasheet, PDF (1/6 Pages) Pericom Semiconductor Corporation – Fast CMOS 16-Bit Bidirectional Transceivers

PI74FCT16245T
PI74FCT162245T
PI74FCT162H245T
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Fast CMOS 16-Bit
Bidirectional Transceivers
Product Features
Common Features
• PI74FCT16245T, PI74FCT162245T and PI74FCT162H245
are high-speed, low-power devices with high-current drive
• V_CC = 5V ± 10%
• Hysteresis on all inputs
• Packages available:
– 48-pin 240 mil wide plastic TSSOP (A48)
– 48-pin 173 mil wide plastic TVSOP (JEDEC TSSOP K48)
– 48-pin 300 mil wide plastic SSOP (V48)
PI74FCT16245T Features
• High output drive: I_OH = –32mA; I_OL = 64mA
• Power off disable outputs permit “live insertion”
• Typical V_OLP (Output Ground Bounce)
< 1.0V at V_CC = 5V, T_A = 25°C
PI74FCT162245T Features
• Balanced output drivers: ±24mA
• Reduced system switching noise
• Typical V_OLP (Output Ground Bounce)
< 0.6V at V_CC = 5V, T_A = 25°C
PI74FCT162H245T Features
• Bus Hold retains last active bus state during Three-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.
The PI74FCT16245T, PI74FCT162245T, and PI74FCT162H245T
are 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 Ouput 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 PI74FCT16245T output buffers are designed with a Power-
Off disable allowing “live insertion” of boards when used as
backplane drivers.
The PI74FCT162245T 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 PI74FCT162H245T 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
1DIR
1A0
1A1
1A2
1A3
1A4
1A5
1A6
1A7
2DIR
1OE
2A0
1B0
2A1
1B1
2A2
1B2
2A3
1B3
2A4
1B4
2A5
1B5
2A6
1B6
2A7
1B7
2OE
2B0
2B1
2B2
2B3
2B4
2B5
2B6
2B7
1
PS2032D 05/17/99