PI3VT3245 8-Bit, 2-Port, Low Voltage Translator Bus Switch Features Description Near-Zero propagation delay Pericom Semiconductors PI3VT series of logic circuits are produced Low On-Resistance switches connect inputs to outputs using the Companys advanced submicron CMOS technology, achieving industry leading performance. 2.5V to 3.3V Supply voltage operation 2.5V or 1.8V switching The PI3VT3245 is a 2.5V or 3.3V 8-bit, 2-port bus switch designed with a low On-Resistance (5). The switches are turned Packaging (Pb-free & Green available): ON or enabled by the Bus Enable (BE) input signal. 20-pin, 150-mil wide plastic QSOP (Q) 20-pin, 173-mil wide plastic TSSOP (L) Given a 3.3V supply and an input voltage of 3.3V, the switch translates to an output voltage of 2.5V. Similarly, when operated with a 2.5V supply and given 2.5V inputs, the device translates Applications the outputs to 1.8V. 3.3V to 2.5V level shifting (voltage translation) 2.5V to 1.8V level shifting (voltage translation) Block Diagram Pin Configuration NC 1 20 V CC A 0 B A 2 19 BE 0 0 A 3 18 B 1 0 A 4 17 B 2 1 A A 5 16 B 7 B 3 2 7 A 6 15 B 4 3 A 7 14 B 5 4 A 8 13 B 6 5 BE A 9 12 B 7 6 GND 10 11 B 7 (1) Truth Table Pin Description Function BE A0-7 Pin Name Description Disconnect H Hi-Z BE Bus Enable Input (Active Low) Connect L B0-7 A -A Bus A 0 7 Notes: B -B Bus B 0 7 1. H = High Voltage Level L = Low Voltage Level V Power CC Hi-Z = High Impedance GND Ground PS8530B 08/13/04 1PI3VT3245 8-Bit, 2-Port, Low Voltage Translator Bus Switch 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 RATINGS may cause permanent damage to the device. This is a stress Ambient Temperature with Power Applied ........................ 40C to +85C rating only and functional operation of the device at these or any Supply Voltage to Ground Potential..................................... 0.5V to +4.6V other conditions above those indicated in the operational sec- tions of this specification is not implied. Exposure to absolute DC Input Voltage ................................................................. 0.5V to +5.5V maximum rating conditions for extended periods may affect DC Output Current............................................................................ 120mA reliability. Power Dissipation ................................................................................ 0.5W DC Electrical Characteristics (Over Operating Range, T = 40C to +85C, V = 3.3V 10%) A CC (1) (2) Parameters Description Test Conditions Min. Typ. Max. Units V Input HIGH Voltage Guaranteed logic HIGH level 2.0 V +0.3V IH CC V V Input LOW Voltage Guaranteed logic LOW level -0.5 0.8 IL I Input HIGH Current V = Max., V = V 1 IH CC IN CC I Input LOW Current V = Max., V = GND 1 IL CC IN A High Impedance Output I 0 A, B V 1 OZH CC Current V = Min, V = 0V, I = -8mA 5 8 CC IN ON V = Min., V = 1.7V, I = -8mA 15 22 CC IN ON R Switch On-Resistance ON V = 2.3V., V = 0V, I = -8mA 6 9 CC IN ON V = 2.3V., V = 1.3V, I = -8mA 25 30 CC IN ON V = V = 3.3V, I = -5A 2.3 2.5 2.9 IN CC OUT Vp Pass Voltage V V = V = 2.5V, I = -5A 1.8 IN CC OUT Capacitance (T = 25C, f = 1 MHz) A (5) Parameters Description Test Conditions Typ. Units C Input Capacitance 3.5 IN C A/B Capacitance, Switch Off V = 0V 5.0 pF OFF IN C A/B Capacitance, Switch On 11.2 ON Notes: 1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at V = 3.3V, T = 25C ambient and maximum loading. CC A 3. Not more than one output should be shorted at one time. Duration of the test should not exceed one second. 4. Measured by the voltage drop between A and B pin at indicated current through the switch. On-Resistance is determined by the lower of the voltages on the two (A,B) pins. 5. This parameter is determined by device characterization but is not production tested. PS8530B 08/13/04 2