PI5C32X245 16-Bit, 2-Port BusSwitch Product Features: • • • • Near-Zero propagation delay 5Ω switches connect inputs to outputs Direct bus connection when switches are ON Ultra-low quiescent power (0.2µA typical) – Ideally suited for notebook applications • Pin compatible with QS32X245 • Industrial operating temperature: –40°C to +85°C • Packaging (Pb-free & Green available): – 40-pin 150-mil wide plastic BQSOP (B) Description: Pericom Semiconductor’s PI5C32X245 is a 16-bit, 2-port bus switch. Two enable signals (BEn) turn the switches on. The bus switch creates no additional propagational delay or additional ground bounce noise. Pin Configuration Block Diagram A0 B0 A7 B7 BE1 A8 B8 A15 B15 BE2 NC 1 40 VCC A0 A1 A2 A3 A4 2 39 3 38 4 37 5 36 6 35 A5 7 34 BE1 B0 B1 B2 B3 B4 A6 A7 8 9 33 32 GND NC A8 10 31 11 30 12 29 B5 B6 B7 VCC BE2 B8 B9 A9 13 28 A10 A11 14 27 15 26 A12 A13 A14 A15 16 25 17 24 18 23 19 22 B14 GND 20 21 B15 B10 B11 B12 B13 Truth Table(1) Function Disconnect Connect BEn H L A0–15 Hi-Z B0–15 Note: 1. H = High Voltage Level, L = Low Voltage Level, Hi-Z = High Impedance Pin Description Pin Name BEn A0-A15 B0-B15 1 I/O I I/O I/O Description Bus Enable Input (Active LOW) Bus A Bus B PS7057E 09/16/04 PI5C32X245 16-Bit, 2-Port BusSwitch Maximum Ratings (Above which the useful life may be impaired. For user guidelines, not tested.) Storage Temperature ..........................................................–65°C to +150°C Ambient Temperature with Power Applied .........................–40°C to +85°C Supply Voltage to Ground Potential (Inputs & Vcc Only) ...–0.5V to +7.0V Supply Voltage to Ground Potential (Outputs & D/O Only) –0.5V to +7.0V DC Input Voltage ..................................................................–0.5V to +7.0V DC Output Current............................................................................120 mA Note: Stresses greater than those listed under MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. Power Dissipation .................................................................................0.5W DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 5V ±10%) Parameters Test Conditions(1) Description Min. Typ(2) Max. Units VIH Input HIGH Voltage Guaranteed Logic HIGH Level 2.0 – – VIL Input LOW Voltage Guaranteed Logic LOW Level –0.5 – 0.8 IIH Input HIGH Current VCC = Max., VIN = VCC – – ±1 IIL Input LOW Current VCC = Max., VIN = GND – – ±1 IOZH High Impedance Output Current 0 ≤ A, B ≤ VCC – – ±1 VIK Clamp Diode Voltage VCC = Min., IIN = –18 mA – –0.7 –1.2 V IOS Short Circuit 100 – – mA VH Input Hysteresis at Control Pins – 150 – mV ROH Switch On-Resistance(4) VCC = Min., VIN = 0.0V, ION = 48 mA – 5 7 VCC = Min., VIN = 2.4V, ION = 15 mA – 10 15 Current(3) A (B) = 0V, B (A) = VCC V µA Ω Capacitance (TA = 25°C, f = 1 MHz) Parameters(5) Description CIN Input Capacitance COFF A/B Capacitance, Switch Off CON A/B Capacitance, Switch On Test Conditions Typ Units 6 VIN = 0V 6 pF 12 Notes: 1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at VCC = 5.0V, TA = 25°C ambient and maximum loading. 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. 2 PS7057E 09/16/04 PI5C32X245 16-Bit, 2-Port BusSwitch Power Supply Characteristics Parameters Test Conditions(1) Description ICC Quiescent Power Supply Current VCC = Max. VIN = GND or VCC ΔICC Supply Current per Input @ TTL HIGH VCC = Max. VIN = 3.4V(3) Supply Current per Input per MHz(4) VCC = Max., A and B Pins Open BEn = GND Control Input Toggling 50% Duty Cycle ICCD Min. Typ(2) Max. Units 0.1 3.0 µA 2.5 mA 0.25 mA/ MHz Notes: 1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device. 2. Typical values are at Vcc = 5.0V, +25°C ambient. 3. Per TTL driven input (VIN = 3.4V, control inputs only); A and B pins do not contribute to Icc. 4. This current applies to the control inputs only and represent the current required to switch internal capacitance at the specified frequency. The A and B inputs generate no significant AC or DC currents as they transition. This parameter is not tested, but is guaranteed by design. Switching Characteristics over Operating Range Parameters Description tPLH tPHL Propagation Delay(2,3) Ax to Bx, Bx to Ax tPZH tPZL Bus Enable Time BEX to Ax or Bx tPHZ tPLZ Bus Disable Time BEx to Ax or Bx Conditions(1) CL = 50pF RL = 500Ω Com. Min. Max. — 0.25 1.5 6.5 1.5 5.5 Unit ns Notes: 1. See test circuit and waveforms. 2. This parameter is guaranteed but not tested on Propagation Delays. 3. The bus switch contributes no propagational delay other than the RC delay of the On-Resistance of the switch and the load capacitance. The time constant for the switch alone is of the order of 0.25ns for 50pF load. Since this time constant is much smaller than the rise/fall times of typical driving signals, it adds very little propagational delay to the system. Propagational delay of the bus switch when used in a system is determined by the driving circuit on the driving side of the switch and its interaction with the load on the driven side. 3 PS7057E 09/16/04 PI5C32X245 16-Bit, 2-Port BusSwitch Packaging Mechanical: 40-pin BQSOP (B) X.XX DENOTES DIMENSION IN MILLIMETERS X.XX Ordering Information Ordering Code Package Code Package Description PI5C32X245B B 40-pin BQSOP PI5C32X245BE B Pb-free & Green, 40-pin BQSOP Notes: 1. Thermal characteristics can be found on the company web site at www.pericom.com/packaging/ Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com 4 PS7057E 09/16/04