PI74ALVCH32245 Datasheet, PDF (1/7 Pages) Pericom Semiconductor Corporation – 3.3V,32-Bit Bidirectional Transceiver with 3-State Outputs

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3.3V, 32-Bit Bidirectional Transceiver
with 3-State Outputs
Product Features
• PI74ALVCH32245 is designed for low voltage operation
• V_CC = 2.3V to 3.6V
• Typical V_OLP (Output Ground Bounce)
< 0.8V at V_CC = 3.3V, T_A = 25°C
• Typical V_OHV (Output V_OH Undershoot)
> 2.0V at V_CC = 3.3V, T_A = 25°C
• Bus Hold retains last active bus state during 3-State,
eliminating the need for external pullup resistors
• Industrial operation at –40°C to +85°C
• Packages available:
– 96-ball, 13.5mm x 5.5mm x 1.4mm low profile fine
pitch ball grid array, LFBGA (NB)
Logic Block Diagram (Positive Logic)
Product Description
Pericom Semiconductor’s PI74ALVCH series of logic circuits are
produced using the Company’s advanced 0.5 micron CMOS
technology, achieving industry leading speed grades.
The PI74ALVCH32245 is a 32-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
this device as either four independent 8-bit transceivers, two 16-Bit
transceivers, or one 32-Bit transceiver. The output enable (OE)
input, when HIGH, disables both A and B ports by placing them in
HIGH Z condition.
To ensure the high-impedance state during power up or power
down, OE should be tied to V_CC through a pull-up resistor; the
minimum value of the resistor is determined by the current sinking
ability of the driver.
Active bus-hold circuitry is provided to hold unused or floating
data inputs at a valid logic level.
1DIR ^A3
1A1 ^A5
A4 _1OE
2DIR ^H3
A2 _1B1
2A1 ^E5
H4 _2OE
E2 _2B1
To Seven Other Channels
To Seven Other Channels
3DIR ^J3
3A1 ^J5
J4 _3OE
4DIR ^T3
J2 _3B1
4A1 ^N5
T4 _4OE
N2 _4B1
To Seven Other Channels
To Seven Other Channels
1
PS8437 08/24/01