PI74ALVCH16952 Datasheet | Pericom Semiconductor

Features PI74ALVCH16952 is designed for low voltage operation VCC = 2.3V to 3.6V Hysteresis on all inputs Typical VOLP (Output Ground Bounce) < 0.8V at VCC = 3.3V, TA = 25°C .. - Typical VOHV (Output VOH Undershoot) < 2.0V at VCC = 3.3V, TA = 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: – 48-pin 240 mil wide plastic TSSOP (A) – 48-pin 300 mil wide plastic SSOP (V) - - - - Product Description Peri Semiconductor’s PI74ALVCH series of logic circuits are produced using the pany’s advanced 0.5 micron CMOS technology, achieving industry leading speed. The PI74ALVCH16952 16-bit registered transceiver is designed for 2.3V to 3.6V VCC operation. The product contains two sets of D-type flip-flops for temporary storage of data flowing in either direction. The device can be used as two 8-bit transceivers or one 16-bit tranceiver. Data on the A or B bus is stored in the registers on the low-to-high transition of the clock (CLKAB or CLKBA) input provided that the clock-enable (CLKENAB or CLKENBA) input is low. Taking the output-enable (OEAB or OEBA) input low accesses the data on either port. To ensure the high-impedance state during power up or power down, OE should be tied to Vcc through a pull-up resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. The PI74ALVCH16952 has “Bus Hold” which retains the data input’s last state whenever the data input goes to high-impedance preventing “floating” inputs and eliminating the need for pullup/ down resistors. 3 2 56 54 55 1 1CLKENBA 1CLKBA 1OEAB Logic Block Diagram 1CLKENAB 1CLKAB 1OEBA One of Eight Channels 1A1 5 C1 CE 1D C1 CE 1D 52 1B1 To Seven Other Channels 2CLKENAB 2CLKAB 2OEBA 26 27 29 31 30 28 2CLKENBA 2CLKBA 2OEAB One of Eight Channels 2A1 15 C1 CE 1D C1 CE 1D 42 2B1 To Seven Other Channels PS8197A 10/16/00...