PI74FCT16245T PI74FCT162245T Fast CMOS 16-Bit Bidirectional Trans ceiv ers Features Description Common Features Pericom Semiconductors PI74FCT16245T and PI74FCT162245T are 16-bit bidirectional transceivers designed for asynchronous two- PI74FCT16245T and PI74FCT162245T are high-speed, low- way communication between data buses. The direction control power devices with high-current drive input pin (xDIR) determines the direction of data ow through the V = 5V 10% CC bidirectional transceiver. The Direction and Ouput Enable controls Hysteresis on all inputs are designed to operate these devices as either two independent 8- PI74FCT16245T Features bit transceivers or one 16-bit transceiver. The output enable (OE) High output drive: I = 32mA I = 64mA OH OL input, when HIGH, disables both A and B ports by placing them Power off disable outputs permit live insertion in Hi-Z condition. Typical V (Output Ground Bounce) OLP The PI74FCT16245T output buffers are designed with a power off < 1.0V at V = 5V, T = 25C CC A disable allowing live insertion of boards when used as backplane Packaging (Pb-free & Green available): drivers. 48-pin 240-mil wide plastic TSSOP (A) The PI74FCT162245T has 24mA balanced output drivers. It is 48-pin 300-mil wide plastic SSOP (V) designed with current limiting resistors at its outputs to control the 48-pin 300-mil wide plastic TVSOP (K) output edge rate resulting in lower ground bounce and undershoot. PI74FCT162245T Features This eliminates the need for external terminating resistors for most interface applications. Balanced output drivers: 24mA Reduced system switching noise Typical V (Output Ground Bounce) OLP < 0.6V at V = 5V, T = 25C CC A Packaging (Pb-free & Green available): 48-pin 240-mil wide plastic TSSOP (A) 48-pin 300-mil wide plastic SSOP (V) 48-pin 300-mil wide plastic TVSOP (K) Block Diagram DIR DIR 1 2 OE OE 1 2 A A 1 0 2 0 B B 1 0 2 0 A A 1 1 2 1 B B 1 1 2 1 A A 1 2 2 2 B B 1 2 2 2 A A 1 3 2 3 B B 1 3 2 3 A A 1 4 2 4 B B 1 4 2 4 A A 1 5 2 5 B B 1 5 2 5 A A 1 6 2 6 B B 1 6 2 6 A A 1 7 2 7 B B 1 7 2 7 08-0291 PS2032K 11/06/08 1PI74FCT16245T PI74FCT162245T Fast CMOS 16-Bit Bidirectional Tranceivers Maximum Ratings (Above which the useful life may be impaired. For user guidelines, not tested.) Note: Storage Temperature ............................................................65C to +150C Stresses greater than those listed under MAXIMUM Ambient Temperature with Power Applied ...........................40C to +85C RATINGS may cause permanent damage to the device. This is a stress rating only and functional Supply Voltage to Ground Potential (Inputs & V Only) .....0.5V to +7.0V CC op er a tion of the device at these or any other con- Supply Voltage to Ground Potential (Outputs & D/O Only) ..0.5V to +7.0V di tions above those indicated in the operational sections of this specification is not implied. DC Input Voltage ....................................................................0.5V to +7.0V Exposure to absolute maximum rating conditions for DC Output Current ............................................................................... 120mA extended periods may affect reliability. Power Dissipation ................................................................................... 1.0W Pin Con guration Truth Table (1) Inputs (1) Outputs DIR OE 1 1 48 1 OE DIR X X B A0 1 0 2 47 1 L L Bus B Data to Bus A B A 1 1 3 46 1 1 L H Bus A Data to Bus B GND GND 4 45 H X High Z State B A 1 2 5 44 1 2 Note: B A 1 3 6 43 1 3 1. H = High Voltage Level, X = Dont Care, V 7 42 V CC CC L = Low Voltage Level, Z = High Impedance B A 1 4 8 41 1 4 B A 1 5 9 40 1 5 GND 10 39 GND Pin Description B A 1 6 11 38 1 6 Pin Name Description B 12 37 A 1 7 1 7 OE 3-State Enable Inputs (Active LOW) X B 13 36 A0 2 0 2 DIR Direction Control Input X B A 2 1 14 35 2 1 A Side A Inputs or 3-State Outputs X X GND 15 34 GND B Side B Inputs or 3-State Outputs X X B 16 33 A 2 2 2 2 GND Ground B 17 32 A 2 3 2 3 V Power V 18 31 V CC CC CC B 19 30 A 2 4 2 4 B 20 29 A 2 5 2 5 GND 21 28 GND 22 27 B A 2 6 2 6 B 23 26 A 2 7 2 7 DIR 24 25 OE 2 2 08-0291 PS2032K 11/06/08 2