PI74LPT16245 Fast CMOS 3.3V 16-Bit Bidirectional Transceiver Product Features Product Description Compatible with LCX and LVT families of products The PI74LPT16245 is a 16-bit bidirectional transceiver designed for asynchronous two-way communication between data buses. Supports 5V Tolerant Mixed Signal Mode Operation The direction control input pin (xDIR) determines the direction Input can be 3V or 5V of data ow through the bidirectional transceiver. The Direction Output can be 3V or connected to 5V bus and Output Enable controls are designed to operate this device as Advanced Low Power CMOS Operation either two independent 8-bit transceivers or one 16-bit transceiver. Excellent output drive capability: The output enable (OE) input, when HIGH, disables both A and B Balanced drives (24 mA sink and source) ports by placing them in HIGH Z condition. Pin compatible with industry standard double-density pinouts The PI74LPT16245 can be driven from either 3.3V or 5.0V Low ground bounce outputs devices allowing this device to be used as a translator in a mixed Hysteresis on all inputs 3.3/5.0V system. Industrial operating temperature range: 40C to +85C Multiple center pins and distributed Vcc/GND pins minimize switching noise Packaging (Pb-free & Green available): 48-pin 240 mil wide thin plastic TSSOP (A) 48-pin 300 mil wide plastic SSOP (V) Logic Block Diagram 1DIR 2DIR 1OE 2OE 1A0 2A0 1B0 2B0 1A1 2A1 1B1 2B1 1A2 2A2 1B2 2B2 1A3 2A3 1B3 2B3 1A4 2A4 1B4 2B4 1A5 2A5 1B5 2B5 1A6 2A6 1B6 2B6 1A7 2A7 1B7 2B7 08-0291 PS2068F 11/10/08 1PI74LPT16245 3.3V 16-Bit Bidirectional Transceiver Maximum Ratings (Above which the useful life may be impaired. For user guidelines, not tested.) Storage Temperature ............................................................. 55C to +125C Note: Stresses greater than those listed under MAXIMUM Ambient Temperature with Power Applied ............................ 40C to +85C RATINGS may cause permanent dam age to the de- Supply Voltage to Ground Potential (Inputs & Vcc Only) ...... 0.5V to +7.0V vice. This is a stress rating only and functional op- Supply Voltage to Ground Potential (Outputs & D/O Only) ... 0.5V to +7.0V er a tion of the device at these or any other con di tions above those indicated in the op er a tion al sec tions DC Input Voltage ..................................................................... 0.5V to +7.0V of this speci cation is not implied. Exposure to ab so lute DC Output Current ............................................................................... 120 mA maximum rating conditions for ex tend ed periods may af- fect reliability. Power Dissipation .................................................................................... 1.0W (1) Product Pin Con guration Truth Table Inputs Outputs 1DIR 1 48 1OE XOE XDIR 1B0 2 47 1A0 L L Bus B Data to Bus A 1B1 3 46 1A1 GND 4 45 GND L H Bus A Data to Bus B 1B2 5 44 1A2 HX Z 1B3 6 43 1A3 Notes: VCC 7 42 VCC 1. H = High Voltage Level, X = Don t Care, 1B4 8 41 1A4 L = Low Voltage Level, Z = High Impedance 1B5 9 40 1A5 GND 10 39 GND 1B6 11 38 1A6 48-PIN 1B7 12 37 1A7 V48 2B0 13 36 2A0 Product Pin Description A48 2B1 14 35 2A1 Pin Name Description GND 15 34 GND xOE 3-State Output Enable Inputs (Active LOW) 2B2 16 33 2A2 xDIR Direction Control Input 2B3 17 32 2A3 VCC 18 31 VCC xAx Side A Inputs or 3-State Inputs 2B4 19 30 2A4 xYx Side B Outputs or 3-State Outputs 2B5 20 29 2A5 GND Ground GND 21 28 GND V Power CC 2B6 22 27 2A6 2B7 23 26 2A7 2DIR 24 25 2OE 08-0291 PS2068F 11/10/08 2