PI5C16861 PERICOM | Alldatasheet

Document overview

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  • PDF pages: 5

Technical content

Features

  • 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
  • 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)

Description

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. 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. 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

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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 , 16861 — 5 7 ΩION = 48mA 162861 20 28 40 VCC = Min., VIN = 2.4V , 16861 — 10 15 ION = 15mA 162861 20 35 48 Maximum Ratings (Above which the useful life may be impaired. For user guidelines, not tested.) Note: Stresses greater than those listed under MAXIMUM RAT- 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(5) 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. 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.

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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 Toggling 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. 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. 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. PI5C16861 Switching Characteristics over Operating Range Parameters Description Conditions(1) PI5C16861 UnitCom. Min Max tPLH tPHL Propagation Delay(2,3) Ax to Bx, Bx to Ax CL = 50pF RL = 500Ω 1.25 nstPZH tPZL Bus Enable Time BEx to Ax or Bx 1.5 6.5 tPHZ tPLZ Bus Disable Time BEx to Ax or Bx 1.5 5.5 PI5C162861 Switching Characteristics over Operating Range Parameters Description Conditions(1) PI5C162861 UnitCom. Min Max tPLH tPHL Propagation Delay(2,3) Ax to Bx, Bx to Ax CL = 50pF RL = 500Ω 1.25 nstPZH tPZL Bus Enable Time BEx to Ax or Bx 1.5 6.5 tPHZ tPLZ Bus Disable Time BEx to Ax or Bx 1.5 5.5

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20-Bit, 2-Port Bus Switch Packaging Mechanical: 48-pin TSSOP (A) Packaging Mechanical: 48-pin SSOP (V) 0.20 0.51 1.01 0.25 0.381 0.635.008 .008 .0160-8˚ 0.20 0.40 .110 2.79 .010 Gauge Plane .02 .04 .015 .025 x 45˚ .025 BSC 0.635 .291 .299 X.XX X.XX DENOTES DIMENSIONS IN MILLIMETERS 7.39 7.59 .395 .420 10.03 10.67 .620 .630 15.75 16.00 .008 .0135 0.20 0.34 Nom. Max .236 .244 .488 .496 .002 .006 SEATING PLANE .007 .010 .0197 BSC .004 .008 .319 12.4 12.6 6.0 6.2 0.50 0.17 0.27 8.1 0.05 0.15 0.09 0.20 X.XX X.XX DENOTES DIMENSIONS IN MILLIMETERS .018 .030 0.45 0.75 .047

1.20 Max

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20-Bit, 2-Port Bus Switch Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com

Ordering Information

Ordering Code Package Type Package Description PI5C16861A A 48-Pin, TSSOP PI5C16861AE A Pb-free & Green, 48-Pin, TSSOP PI5C16861V V 48-Pin, SSOP PI5C16861VE V Pb-free & Green, 48-Pin, SSOP PI5C16861B B 48-Pin, BQSOP PI5C16861BE B Pb-free & Green, 48-Pin, BQSOP PI5C162861A A 48-Pin, TSSOP PI5C162861AE A Pb-free & Green, 48-Pin, TSSOP PI5C162861V V 48-Pin, SSOP PI5C162861VE V Pb-free & Green, 48-Pin, SSOP PI5C162861B B 48-Pin, BQSOP PI5C162861BE B 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 Packaging Mechanical: 48-pin BSQOP (B) .014 .0157 BSC 0.40 0.356 .008 0.20 .002 .009 5˚ 0.05 0.25 .079 2.0 .010 0.25 Gauge Plane .150 .157 X.XX X.XX DENOTES DIMENSIONS IN MILLIMETERS 3.80 4.00 .228 .244 5.80 6.20 .020 .029 0.50 0.75 .063 1.60 .015 0.381 .386 .394 9.80 10.00 .0051 .009 0.13 0.23 x 45˚ BSC Nom Max NomREF