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PI5C16861 PI5C162861 (25) 20-Bit, 2-Port Bus Switch
Features
* * * *
Near-Zero propagation delay 5 or 25 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 A typical) - ideally suited for notebook applications * Industrial operating temperature: -40C to +85C * 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, 2port bus switch designed with a low On-Resistance (5) 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 25 series resistor to reduce noise resulting from reflections, thus eliminating the need for an external terminating resistor.
Pin Configuration
NC A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 GND NC A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 VCC BE1 B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 VCC BE2 B10 B11 B12 B13 B14 B15 B16 B17 B18 B19
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
Pin Description
Pin Name BEx A19-A0 B19-B0 Description Bus Enable Inputs (Active LOW) Bus A Bus B
PS7026E 09/13/04
Note: 1. H = High Voltage Level, L = Low Voltage Level, Hi-Z = High Impedance
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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 ............................................................. -65C to +150C Ambient Temperature with Power Applied ............................ -40C to +85C 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 Power Dissipation .................................................................................... 0.5W
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.
DC Electrical Characteristics (Over the Operating Range, TA = -40C to +85C, VCC = 5V 10%)
Parameters VIH VIL IIH IIL IOZH VIK ION VH Description Input HIGH Voltage Input LOW Voltage Input HIGH Current Input LOW Current High Impedance Output Current Clamp Diode Voltage Short Circuit Current(3) Input Hysteresis at Control Pins VCC = Min., VIN = 0.0V, RON Switch On-Resistance(4) ION = 48mA VCC = Min., VIN = 2.4V, ION = 15mA 16861 162861 16861 162861 Test Conditions(1) Min. 2.0 -0.5 -- -- -- -- 100 -- -- 20 -- 20 Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max., VIN = VCC VCC = Max., VIN = GND 0 A, B VCC VCC = Min., IIN = -18mA A (B) = 0V, B (A) = VCC
Typ(2) -- -- -- -- -- -0.7 -- 150 5 28 10 35
Max. -- 0.8 1 1 1 -1.2 -- -- 7 40 15 48
Units V
A V mA mV
Capacitance (TA = 25C, f = 1 MHz)
Parameters(5) CIN COFF CON Description Input Capacitance A/B Capacitance, Switch Off A/B Capacitance, Switch On VIN = 0V Test Conditions Typ 6 6 8 pF Units
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 = 25C 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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09/13/04
PI5C16861/162861 20-Bit, 2-Port Bus Switch Power Supply Characteristics
Parameters ICC ICC ICCD Description Quiescent Power Supply Current Supply Current per Input @ TTL HIGH Supply Current per Input per MHz(4) VCC = Max. VCC = Max. VCC = Max., A and B Pins Open BEX = GND, Control Input Toggling 50% Duty Cycle
Test Conditions(1) VIN = GND or VCC VIN = 3.4V(3)
Min.
Typ(2) 0.1
Max. 10 2.5 0.25
Units A mA 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, +25C 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 tPLH tPHL tPZH tPZL tPHZ tPLZ Description Propagation Delay(2,3) Ax to Bx, Bx to Ax Bus Enable Time BEx to Ax or Bx Bus Disable Time BEx to Ax or Bx CL = 50pF RL = 500 1.5 1.5 Conditions(1) Min Com. Max 1.25 6.5 5.5 ns Unit
PI5C162861 Switching Characteristics over Operating Range
PI5C162861 Parameters tPLH tPHL tPZH tPZL tPHZ tPLZ Description Propagation Delay(2,3) Ax to Bx, Bx to Ax Bus Enable Time BEx to Ax or Bx Bus Disable Time BEx to Ax or Bx CL = 50pF RL = 500 1.5 1.5 Conditions
(1)
Com. Min Max 1.25 6.5 5.5
Unit
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.
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PS7026E
09/13/04
PI5C16861/162861 20-Bit, 2-Port Bus Switch Packaging Mechanical: 48-pin TSSOP (A)
48
.236 .244
6.0 6.2
1
.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
.007 .010
0.17 0.27
.002 .006 0.05 0.15
0.45 .018 0.75 .030
.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
1
.02 0.51 .04 1.01
.620 .630 15.75 16.00
.008 0.20 Nom.
.015 0.381 x 45 .025 0.635
.110 2.79 Max
.025 BSC 0.635
X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS
.008 0.20 .0135 0.34
0-8
.008 0.20 .016 0.40
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
1
.386 .394 9.80 10.00
.010 0.25 BSC
.020 .029 0.50 0.75
.015 0.381 x 45
.008 0.20 Nom
.014 0.356 REF
Nom .063 1.60
.079 2.0 Max .002 0.05 .009 0.25
.0157 BSC 0.40
X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS
.0051 .009 0.13 0.23
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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
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PS7026E 09/13/04

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