PI5C16862C 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 20-Bit, 2-Port Bus Switch with Undershoot Protection Features Description • • • • • Near-Zero propagation delay 5-ohm switches connect inputs to outputs Undershoot Protection up to –1V Direct bus connection when switches are ON 32X384 function with flow through pinout make board layout easier • Ultra-low quiescent power (120µA typical) — ideally suited for notebook applications • Industrial operating temperature: –40°C to +85°C • Packaging (Pb-free & Green avaliable): — 48-pin 240-mil wide plastic TSSOP — 48-pin 150-mil wide plastic BQSOP Pericom Semiconductor’s PI5C16862C is configured as a 20-bit, 2port bus switch designed with a low On-Resistance (5-ohm) 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. Block Diagram Pin Configuration A0 B0 A4 B4 The PI5C16862C can withstand undershoot of up to –1V. BE2 A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 GND BE4 A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 GND BE1 A15 B15 A19 B19 BE4 Truth Table(1) 1 48 2 47 3 46 4 45 5 44 6 43 7 42 8 41 9 40 10 39 11 48-Pin 38 12 A, B 37 13 36 14 35 15 34 16 33 17 32 18 31 19 30 20 29 21 28 22 27 23 26 24 25 VCC BE1 B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 VCC BE3 B10 B11 B12 B13 B14 B15 B16 B17 B18 B19 Pin Description Function BEx A19-A0 Pin Name Disconnect H Hi- Z BEx Connect L B19- B0 A19- A0 Bus A B19- B0 Bus B Note: 1. H = High Voltage Level L = Low Voltage Level Hi-Z = High Impedance 1 De s cription Bus Enable Inputs (Active LOW) PS8391C 09/15/04 PI5C16862C 20-Bit, 2-Port Bus Switch with Undershoot Protection 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 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%) Parame te rs Te s t Conditions (1) De s cription M in. Typ.(2) M ax. 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 Units V µA IOZH High Impedance Output Current 0 ≤ IN, YN ≤ VCC — — ±1 VIK Clamp Diode Voltage VCC = Min., IIN = –18mA — — –1.8 V A(B) = 0V, B (A) = VCC 100 — — mA — 150 — mV VCC = Min., VIN = 0.0V, ION = 48mA — 5.5 8 VCC = Min., VIN = 2.4V, ION = 15mA — 9 16 Current(3) IOS Short Circuit VH Input Hysteresis at Control Pins RON Switch ON Resistance(3) Ω Capacitance (TA = 25°C, f = 1 MHz) Parame te rs (5) De s cription Te s t Conditions Typical CIN Input Capacitance VIN = 0V 6 C O FF A/B Capacitance, Switch Off VIN = 0V 6 CON A/B Capacitance, Switch On VIN = 0V 10 Units pF 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 PS8391C 09/15/04 PI5C16862C 20-Bit, 2-Port Bus Switch with Undershoot Protection 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Power Supply Characteristics Parame te rs Te s t Conditions (1) De s cription M in. ICC Quiescent Power Supply Current VCC = Max. VIN = GND or VCC ∆ICC Quiescent Power Input @ TTL HIGH VCC = Max. VIN = 3.4V(3) ICCD Supply Current per Input per MHz(4) VCC = Max., A and B Pin Open BEx = GND, Control Input Toggling, 50% Duty Cycle Typ.(2) M ax. Units 120 200 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 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 PI5C16862C Parame te rs De s cription Conditions (1) M in. (2,3) tPLH tPHL Propagation Delay 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 Units Com. M a x. 0.25 C L = 50pF RL = 500Ω 1.5 6.5 1.5 5.5 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 PS8391C 09/15/04 PI5C16862C 20-Bit, 2-Port Bus Switch with Undershoot Protection 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Packaging Mechanical: 48-Pin TSSOP (A) 48 .236 .244 1 6.0 6.2 .488 12.4 .496 12.6 .047 1.20 Max SEATING PLANE .004 0.09 .008 0.20 X.XX X.XX DENOTES DIMENSIONS IN MILLIMETERS .0197 BSC 0.50 0.45 .018 0.75 .030 .002 .006 0.05 0.15 .007 .010 0.17 0.27 .319 BSC 8.1 Packaging Mechanical: 48-Pin BQSOP (B) 48 .150 .157 3.80 4.00 .228 .244 5.80 6.20 Gauge Plane .020 .029 0.50 0.75 .010 0.25 BSC 1 .014 0.356 REF .386 .394 9.80 10.00 .015 0.381 x 45˚ .008 0.20 Nom Nom .063 1.60 .002 0.05 .009 0.25 5˚ .0157 BSC 0.40 X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS .079 2.0 Max .0051 .009 0.13 0.23 Ordering Information Ordering Code Package Code Package Description PI5C16862CA A 48-pin TSSOP PI5C16862CAE A Pb-free & Green, 48-pin TSSOP PI5C16862CB B 48-pin BQSOP PI5C16862CBE B Pb-free & Green, 48-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 PS8391C 09/15/04