PI5C16861 PI5C162861 (25Ω) 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 (0.2 µA typical) – ideally suited for notebook applications • Industrial operating temperature: –40°C to +85°C Pericom Semiconductor’s PI5C16861 is configured as a 20-bit, 2port 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. The PI5C162861 device has a built-in 25Ω series resistor to reduce noise resulting from reflections, thus eliminating the need for an external terminating resistor. • Packaging (Pb-free & Green available): – 48-pin 240-mil wide plastic TSSOP (A) – 48-pin 300-mil wide plastic SSOP (V) – 48-pin 150-mil wide plastic BQSOP (B) Pin Configuration Block Diagram A0 B0 A9 B9 BE1 A10 B10 A19 B19 BE2 Truth Table(1) Function Disconnect Connect BEX H L A19-A0 Hi-Z B19-B0 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 Pin Description Note: 1. H = High Voltage Level, L = Low Voltage Level, Hi-Z = High Impedance 1 Pin Name Description BEx A19-A0 B19-B0 Bus Enable Inputs (Active LOW) Bus A Bus B PS7026E 09/13/04 PI5C16861/162861 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. 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 = –18mA — –0.7 –1.2 V ION Short Circuit A (B) = 0V, B (A) = VCC 100 — — mA VH Input Hysteresis at Control Pins — 150 — mV Current(3) Switch On-Resistance(4) RON VCC = Min., VIN = 0.0V, 16861 — 5 7 ION = 48mA 162861 20 28 40 VCC = Min., VIN = 2.4V, 16861 — 10 15 ION = 15mA 162861 20 35 48 V µA Ω Capacitance (TA = 25°C, f = 1 MHz) Parameters(5) 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. 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 PS7026E 09/13/04 PI5C16861/162861 20-Bit, 2-Port Bus Switch Power Supply Characteristics Parameters Test Conditions(1) Description Min. ICC 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 Typ(2) Max. Units 0.1 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 Conditions(1) Description Com. Min 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 Unit Max 1.25 CL = 50pF RL = 500Ω 1.5 6.5 1.5 5.5 ns PI5C162861 Switching Characteristics over Operating Range PI5C162861 Parameters Description Conditions (1) Com. Min 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 Unit Max 1.25 CL = 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 PS7026E 09/13/04 PI5C16861/162861 20-Bit, 2-Port Bus Switch 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 SSOP (V) 48 .291 .299 7.39 7.59 .395 .420 10.03 10.67 Gauge Plane .010 0.25 .02 0.51 .04 1.01 1 .620 .630 15.75 16.00 .015 0.381 x 45˚ .025 0.635 .008 0.20 Nom. .110 2.79 Max .025 BSC 0.635 .008 0.20 .0135 0.34 0-8˚ .008 0.20 .016 0.40 X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS 4 PS7026E 09/13/04 PI5C16861/162861 20-Bit, 2-Port Bus Switch Packaging Mechanical: 48-pin BSQOP (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 .0157 BSC 0.40 X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS 5˚ .0051 .009 0.13 0.23 .079 2.0 Max .002 0.05 .009 0.25 Ordering Information Ordering Code PI5C16861A PI5C16861AE PI5C16861V PI5C16861VE PI5C16861B PI5C16861BE PI5C162861A PI5C162861AE PI5C162861V PI5C162861VE PI5C162861B PI5C162861BE Package Type A A V V B B A A V V B B Package Description 48-Pin, TSSOP Pb-free & Green, 48-Pin, TSSOP 48-Pin, SSOP Pb-free & Green, 48-Pin, SSOP 48-Pin, BQSOP Pb-free & Green, 48-Pin, BQSOP 48-Pin, TSSOP Pb-free & Green, 48-Pin, TSSOP 48-Pin, SSOP Pb-free & Green, 48-Pin, SSOP 48-Pin, BQSOP Pb-free & Green, 48-Pin, BQSOP Notes: 1. Thermal characteristics can be found on the company web site at www.pericom.com/packaging/ 2. X = Tape and reel Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com 5 PS7026E 09/13/04