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PI3B16861
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
3.3V, 20-Bit, 2-Port NanoSwitchTM
Features
Near-Zero propagation delay 5-ohms switches connect inputs to outputs Fast Switching Speed - 5ns (max.) Direct bus connection when switches are ON 32X384 function with flow through pinout make board layout easier * VCC Operating Range: 3.0V to 3.6V * 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 PI3B16861 is configured as a 3.3 volt, hotinsertion, 20-bit, 2-port bus switch designed with a low On-Resistance (5-ohms) allowing inputs to be connected directly to outputs. The bus switch creates no additional propagational delay or additional ground bounce noise. The switch is turned ON by the Bus Enable (BEx) input signal.
Block Diagram
A0
Pin Configuration
SW
B0
NC A0 A1 A2 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 VCC BE1 B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 VCC BE2 B10 B11 B12 B13 B14 B15 B16 B17 B18 B19
A9
SW
B9
SW
A3 A4 A5
BE1
A
B
A6 A7 A8
A10
SW
B10
BE
A9 GND NC A10
48-Pin A, B, V
39 38 37 36 35 34 33 32 31 30 29 28 27 26 25
A19
SW
B19
A11 A12 A13
BE2
A14 A15 A16
Truth Table(1)
Function Disconnect Connect
Note: 1. H = High Voltage Level L = Low Voltage Level Hi-Z = High Impedance
A17
BEx H L
A19-A0 Hi- Z B19- B0
A18 A19 GND
Pin Description
Pin Name BEx A19- A0 B19- B0 Bus A Bus B De s cription Bus Enable Inputs (Active LOW)
1
PS8175E
09/23/04
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B16861 3.3V, 20-Bit, 2-Port NanoSwitchTM
Maximum Ratings
(Above which 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 Range ....................................................... -0.5V to +4.6V DC Input Voltage ............................................................... -0.5V to +4.6V 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 = 3.0V to 3.6V)
Parame te rs VIH VIL IIH IIL IO ZH VIK RO N De s cription Input HIGH Voltage Input LOW Voltage Input HIGH Current Input LOW Current High Impedance Output Current Clamp Diode Voltage Switch ON Resistance(3) Te s t Conditions (1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VC C = Max., VIN = VC C VC C = Max., VIN = GND 0 A, B VC C VC C = Min., IIN = -18mA VC C = Min., VIN = 0.0V, IO N = 48mA VC C = Min., VIN = 2.4V, IO N = 15mA -0.7 5 10 M in. 2.0 -0.5 0.8 1 1 1 -1.2 8 15 V A Typ.(2) M ax. Units V
Capacitance (TA = 25C, f = 1 MHz)
Parame te rs (4) CIN C O FF CON De s cription Input Capacitance A/B Capacitance, Switch Off A/B Capacitance, Switch On VIN = 0V Te s t Conditions Typ. 3.0 8.5 17 . 0 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 = 3.3V, TA = 25C ambient and maximum loading. 3. 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. 4. This parameter is determined by device characterization but is not production tested.
2
PS8175E
09/23/04
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B16861 3.3V, 20-Bit, 2-Port NanoSwitchTM
Switching Characteristics over Operating Range
PI3B16861 Com. Parame te rs tP LH tP HL tP ZH tP ZL tP HZ tP LZ De s cription Propagation Ax to Bx, Bx to Ax Bus Enable Time BEx to Ax or Bx Bus Disable Time BEx to Ax or Bx Delay(2,3) Conditions (1) C L = 50pF RL = 500 ohms CL = 50pF, RL = 500 ohms, R = 500 ohms 1 1 M in. M a x. 0.25 4.5 5 ns Units
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.
Power Supply Characteristics
Parame te rs ICC ICC ICCD D e s cription Q uiescent Power Supply Current Supply Current per Input @ TTL HIGH Supply Current per Input per MHz(4) Conditions (1) VCC = Max. VCC = Max. VCC = Max., A and B Pins O pen BE = GN D Control Input Toggling 50% Duty Cycle VIN = GN D or VCC VIN = 3.0V(3) M in. -- -- -- Type (2) -- -- -- M ax. 10 750 0.25 A Units
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 = 3.3V, +25C ambient. 3. Per TTL driven input (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.
3
PS8175E
09/23/04
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B16861 3.3V, 20-Bit, 2-Port NanoSwitchTM
Applications Information
Logic Inputs
The logic control inputs can be driven up to +3.6V regardless of the supply voltage. For example, given a +3.3V supply, IN may be driven low to 0V and high to 3.6V. Driving IN Rail-to-Rail(R) minimizes power consumption.
Power-Supply Sequencing and Hot Plug Information
Proper power-supply sequencing is recommended for all CMOS devices. Always apply VCC and GND before applying signals to input/ output or control pins.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd
Packaging Mechanical: 48-pin 240 Mil-Wide Thin Plastic 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 0.45 .018 0.75 .030 .319 BSC 8.1
X.XX X.XX
DENOTES DIMENSIONS IN MILLIMETERS
.0197 BSC 0.50
.007 .010 0.17 0.27
.002 .006 0.05 0.15
Packaging Mechanical: 48-pin 300 Mil-Wide Plastic SSOP (V)
48
.291 .299 7.39 7.59
.395 .420 10.03 10.67
Gauge Plane .010 0.25 1 .620 .630 15.75 16.00 .02 0.51 .04 1.01
.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
PS8175E
09/23/04
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B16861 3.3V, 20-Bit, 2-Port NanoSwitchTM
Packaging Mechanical: 48-pin 150 Mil-Wide Plastic BQSOP (B)
48
.150 .157 3.80 4.00
.228 .244 5.80 6.20
Gauge Plane .010 0.25 BSC .386 .394 9.80 10.00 .020 .029 0.50 0.75
1
.015 0.381 x 45 .008 0.20 Nom Nom .063 1.60 .079 2.0 Max .002 0.05 .009 0.25
.014 0.356 REF
5 .0157 BSC 0.40 X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS .0051 .009 0.13 0.23
Ordering Information
Ordering Code PI3B16861A PI3B16861AE PI3B16861V PI3B16861VE PI3B16861B PI3B16861BE Package Code A A V V B B Package Type 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/
Pericom Semiconductor Corporation * 1-800-435-2336 * www.pericom.com
5
PS8175E 09/23/04

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