PI5C3244 8-Bit, 2-Port Bus Switch Features Description Near-Zero propagation delay Pericom Semiconductors PI5C3244 features a set of eight bus switches which is pinout and function compatible with the PI74F- 5-ohm switches connect inputs to outputs CT244T, 74F244, and 74ALS/AS/LS 244 8-bit drivers. Two enable Direct bus connection when switches are ON signals (BEn) turn the switches on similar to the enable signals of Ultra Low Quiescent Power (0.2A typical) the 244. e Th bus switch creates no additional propagation delay or ground bounce noise. Ideally suited for notebook applications Pin compatible with 74 Series 244 logic devices Packaging (Pb-free & Green): 20-pin 173-mil wide plastic TSSOP (L) 20-pin 150-mil wide plastic QSOP (Q) Block Diagram Pin Configuration BE1 BE1 1 20 VCC 1A0 1B0 1A0 2 19 BE2 1A1 1B1 2B3 3 18 1B0 1A1 4 17 2A3 1A2 1B2 2B2 5 16 1B1 1A3 1B3 1A2 6 15 2A2 2B1 7 14 1B2 BE2 1A3 8 13 2A1 2A0 2B0 2B0 9 12 1B3 GND 10 11 2A0 2A1 2B1 2A2 2B2 2A3 2B3 (1) Truth Table Pin Description Pin Name Description BE1 BE2 1A, 1B 2A, 2B H H Disconnect Disconnect BEn Bus Enable Input (Active LOW) L H 1A = 1B Disconnect A0-A3 Bus A H L Disconnect 2A = 2B B0-B3 Bus B L L 1A = 1B 2A = 2B GND Ground Note: 1. H = High Voltage Level V Power CC L = Low Voltage Level Hi-Z = High Impedance All trademarks are property of their respective owners. www.pericom.com PS8140F 10/12/10 11-0025 1PI5C3244 8-Bit, 2-Port Bus Switch Absolute Maximum Ratings Parameter Min. Max. Units o Storage Temperature -65 150 C o Ambient Temperature with Power Applied -40 85 C Supply Voltage to Ground Potential (Inputs & Vcc Only) -0.5 7.0 V Supply Voltage to Ground Potential (Outputs & D/O Only) -0.5 7.0 V DC Input Voltage -0.5 7.0 V DC Output Current - 120 mA Power Dissipation - 0.5 W Stress beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. DC Electrical Characteristics (Over the Operating Range, T = 40C to +85C, V = 5V 5%) A CC (1) (2) Parameters Description Test Conditions Min Typ Max Units V Input HIGH Voltage Guaranteed Logic HIGH Level 2.0 V IH V Input LOW Voltage Guaranteed Logic LOW Level -0.5 0.8 V IL I Input HIGH Current V = Max., V = V 1 A IH CC IN CC I Input LOW Current V = Max., V = GND 1 A IL CC IN I High Impedance Output Current 0 A, B V 1 A OZH CC Clamp Diode Voltage -0.7 -1.2 V V V = Min, I = -18mA IK CC IN (3) Short Circuit Current 100 mA I A (B) = 0V, B (A) = V OS CC Input Hysteresis at Control Pins 150 mV V H 5 7 V = Min, V = 0.0V, I = 48 mA CC IN ON (4) Switch On Resistance R ON 10 15 V = Min, V = 2.4V, I = 15 mA CC IN 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 = 5.0V, 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. Capacitance (T = 25C, f = 1 MHz) A (1) Parameters Description Test Conditions Typ Units Input Capacitance 6 pF C V = 0V IN IN A/B Capacitance, Switch Off 6 pF C V = 0V OFF IN A/B Capacitance, Switch On 12 pF C V = 0V ON IN Notes: 1. This parameter is determined by device characterization but is not production tested. All trademarks are property of their respective owners. www.pericom.com PS8140F 10/12/10 11-0025 2