PI5C16861AE

PI5C16861 20-Bit, 2-Port Bus Switch Features Description • • • • Near-Zero propagation delay 5Ω or 25Ω switches connect inputs to outputs Direct bus connection when switches are ON 32X384 function with flow through pinout make board layout easier • Ultra-low quiescent power (0.2µA typical) – Ideally suited for notebook applications • Industrial operating temperature: –40°C to +85°C • Packaging (Pb-free & Green): – 48-pin 240-mil wide plastic TSSOP (A) Pericom Semiconductor’s PI5C16861 is configured as a 20-bit, 2-port bus switch designed with a low On-Resistance (5Ω) allowing inputs to be connected directly to outputs. The bus switch creates no additional propagational delay or additional ground bounce noise. The switches are turned ON by the Bus Enable (BEx) input signal. Pin Configuration Block Diagram A0 B0 A9 B9 BE1 A10 B10 A19 B19 BE2 (1) NC 1 48 VCC A0 2 47 BE1 A1 3 46 B0 A2 4 45 B1 A3 5 44 B2 A4 6 43 B3 A5 7 42 B4 A6 8 41 B5 A7 9 40 B6 A8 10 39 B7 A9 11 38 B8 GND 12 37 B9 NC 13 36 VCC A10 14 35 BE2 A11 15 34 B10 A12 16 33 B11 A13 17 32 B12 A14 18 31 B13 A15 19 30 B14 A16 20 29 B15 A17 21 28 B16 A18 22 27 B17 A19 23 26 B18 GND 24 25 B19 Truth Table Function Disconnect Connect BEx H L A19-A0 Hi-Z B19-B0 Pin Description Note: 1. H = High Voltage Level, L = Low Voltage Level, Hi-Z = High Impedance 11-0008 1 Pin Name Description BEx A19-A0 B19-B0 Bus Enable Inputs (Active LOW) Bus A Bus B PS7026H 10/11/10 PI5C16861 20-Bit, 2-Port Bus Switch 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................................................................................. 120mA 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. VIH Input HIGH Voltage Guaranteed Logic HIGH Level 2.0 VIL Input LOW Voltage Guaranteed Logic LOW Level –0.5 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 = –18mA ION Short Circuit VH Input Hysteresis at Control Pins RON Switch On-Resistance(4) Current(3) V 0.8 –0.7 A (B) = 0V, B (A) = VCC Units µA –1.2 V 100 mA 150 mV VCC = Min., VIN = 0.0V 5 7 VCC = Min., VIN = 2.4V 10 15 Ω 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. Capacitance (TA = 25°C, f = 1 MHz) Parameters(1) CIN Description Test Conditions Input Capacitance COFF A/B Capacitance, Switch Off CON A/B Capacitance, Switch On Typ. Units 6 VIN = 0V 6 pF 8 Notes: 1. This parameter is determined by device characterization but is not production tested. 11-0008 2 PS7026H 10/11/10 PI5C16861 20-Bit, 2-Port Bus Switch Power Supply Characteristics Parameters Test Conditions(1) Description Min. Quiescent Power Supply Current VCC = Max. VIN = GND or VCC ΔICC Supply Current per Input @ TTL HIGH VCC = Max. VIN = 3.4V(3) ICCD Supply Current per Input per MHz(4) VCC = Max., A and B Pins Open BEx = GND, Control Input Toggling 50% Duty Cycle ICC Typ.(2) Max. 0.1 Units 10 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. PI5C16861 Switching Characteristics over Operating Range PI5C16861 Parameters Description Conditions Com. Min. Delay(1,2) tPLH tPHL Propagation 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 Unit Max. 1.25 CL = 50pF RL = 500Ω 1.5 6.5 1.5 5.5 ns Notes: 1. This parameter is guaranteed but not tested on Propagation Delays. 2. 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. 11-0008 3 PS7026H 10/11/10 PI5C16861 20-Bit, 2-Port Bus Switch Packaging Mechanical: 48-pin BSQOP (B) 1 DATE: 10/15/08 DESCRIPTION: 48-Pin, 154-Mil Wide BQSOP PACKAGE CODE: B48 DOCUMENT CONTROL #: PD-1210 REVISION: F 08-0522 Ordering Information Ordering Code PI5C16861AE Package Type A Package Description Pb-free & Green, 48-Pin, TSSOP Notes: • Thermal characteristics can be found on the company web site at www.pericom.com/packaging/ • E = Pb-free & Green • Adding an X suffix = Tape/Reel Pericom Semiconductor Corporation • 1-800-435-2336  •  www.pericom.com 11-0008 4 PS7026H 10/11/10