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Document overview

  • Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
  • PDF pages: 4

Technical content

Features

  • Near-Zero propagation delay 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)

Description

Pericom Semico nductor’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 a dditional p ropagational d elay o r a dditional g round b ounce n oise. T he switches are turned ON by the Bus Enable (BEx) input signal. Block Diagram NC GND NC A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 GND VCC BE1 VCC BE2 B10 B11 B12 B13 B14 B15 B16 B17 B18 B19 BE1 BE2 A19 A10 B19 B10 20-Bit, 2-Port Bus Switch 11-0008

20-Bit, 2-Port Bus Switch Parameters Description Test Conditions(1) Min. Typ.(2) Max. Units VIH Input HIGH V oltage Guaranteed Logic HIGH Level 2.0 VVIL Input LOW V oltage Guaranteed Logic LOW Level –0.5 0.8 IIH Input HIGH Current VCC = Max., VIN = VCC ±1 µAIIL Input LOW Current VCC = Max., VIN = GND ±1 IOZH High Impedance Output Current 0 ≤ A, B ≤ VCC ±1 VIK Clamp Diode V oltage VCC = Min., IIN = –18mA –0.7 –1.2 V ION Short Circuit Current(3) A (B) = 0V , B (A) = VCC 100 mA VH Input Hysteresis at Con- trol Pins 150 mV RON Switch On-Resistance(4) VCC = Min., VIN = 0.0V 5 7 ΩVCC = Min., VIN = 2.4V 10 15 Maximum Ratings (Above which the useful life may be impaired. For user guidelines, not tested.) Note: Stresses greater than those listed under MAXIMUM RA INGS 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 ex tended periods may affect reliability. Capacitance (TA = 25°C, f = 1 MHz) Parameters(1) Description Test Conditions Typ. Units CIN Input Capacitance VIN = 0V pFCOFF A/B Capacitance, Switch Off 6 CON A/B Capacitance, Switch On 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. 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. Ambient T emperature with Power Applied to +85°C Supply V oltage to Ground Potential (Inputs Supply V oltage to Ground Potential (Outputs D/O Only) ... –0.5V to +7.0V to +7.0V DC Output Current Power Dissipation Notes: 1. This parameter is determined by device characterization but is not production tested. 11-0008

20-Bit, 2-Port Bus Switch Power Supply Characteristics Parameters Description Test Conditions(1) Min. Typ.(2) Max. Units ICC Quiescent Power Supply Current VCC = Max. VIN = GND or VCC 0.1 10 µA ΔICC Supply Current per Input TTL HIGH VCC = Max. VIN = 3.4V(3) 2.5 mA ICCD Supply Current per Input per MHz(4) VCC = Max., A and B Pins Open BEx = GND, Control Input T oggling 50% Duty Cycle 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. 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 Parameters Description Conditions PI5C16861 UnitCom. Min. Max. tPLH tPHL Propagation Delay(1,2) Ax to Bx, Bx to Ax CL = 50pF RL = 500Ω 1.25 nstPZH tPZL Bus Enable T ime BEx to Ax or Bx 1.5 6.5 tPHZ tPLZ Bus Disable T ime BEx to Ax or Bx 1.5 5.5 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

20-Bit, 2-Port Bus Switch Packaging Mechanical: 48-pin BSQOP (B)

Ordering Information

Ordering Code Package Type Package Description PI5C16861AE A 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 = T ape/Reel Pericom Semiconductor Corporation • 1-800-435-2336 • www .pericom.com : 48-Pin, 154-Mil Wide BQSOPN O I T P I R C S E D : E D O C E G A K C A P 1210 - D P : # L O R T N O C T N E M U C O D F : N O I S I V E R 8 0 / 5 1 / 0 1 : E T A D B48 08-0522 11-0008