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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B16245
3.3V, 16-Bit, 2-Port NanoSwitchTM
Features
* * * * * * * Near-Zero propagation delay 5-ohm switches connect inputs to outputs Fast Switching Speed - 4ns max. Pin compatible with 74 series 16245 Operating VCC Range: 3.0V to 3.6V Industrial operating temperature: -40C to +85C Packaging (Pb-free & Green available): - 48-pin 240-mil wide thin plastic TSSOP (A) - 48-pin 300-mil wide plastic SSOP (V)
Description
Pericom Semiconductor's PI3B16245 is a 3.3 volt, hot-insertion, 16bit, 2-port bus switch that is pin compatible with the 74 series 16245 16-bit transceiver. Two enable signals (nBE) turn the switches on similar to the enable signals of the 16245. The bus switch creates no additional propagation delay or additional ground bounce noise.
Block Diagram
1A0 1B0
Pin Configuration
NC
SW
1B0 1B1
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
1BE 1A0 1A1
GND
1A7
GND
1A2 1A3
SW
1B2
1B7
SW
1B3
VCC
1B4
VCC
1A4 1A5
1BE
A
B
1B5
GND
1B6
BE
GND
1A6 1A7 2A0 2A1
2A0
SW
2B0
1B7 2B0 2B1
GND
2A7
GND
2A2 2A3
SW
2B7
2B2 2B3
VCC
2B4
VCC
2A4 2A5
2BE
2B5
GND
2B6
GND
2A6 2A7 2BE
Truth Table(1)
Function Disconnect Connect
Note: 1. H = High Voltage Level L = Low Voltage Level Hi-Z = High Impedance
2B7
nBE H L
nA0-7 Hi- Z nB0- 7
NC
Pin Description
Pin Name nBE nA0- nA7 nB0- nB7 I/O I I/O I/O Bus A Bus B De s cription Bus Output Enable (Active Low)
1
PS8189E
10/01/04
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B16245 3.3V, 16-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 ........................................................................120 mA 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 V Typ.(2) M ax. Units
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
PS8189E
10/01/04
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B16245 3.3V, 16-Bit, 2-Port NanoSwitchTM
Power Supply Characteristics
Parame te rs ICC ICC ICCD De s cription Quiescent 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 Open Control Input Toggling 50% Duty Cycle VIN = GND 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.
Switching Characteristics over Operating Range
Conditions (1) Parame te rs tP LH tP HL tP ZH tP ZL tP HZ tP LZ D e 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) C L = 50pF RL = 500 C L = 50pF ; RL = 500 C L = 50pF ; RL = 500 1 1 M in. Com. M a x. 0.25 4.5 5.0 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.
Applications Information Logic Inputs
Logic control inputs can be driven up to +5.5V regardless of the supply voltage. For example, given a 5.0V supply, the control or select pins may be driven low to 0V and high to 5.5V. Driving the control or select pins Rail-toRail(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 the input/output or control pins.
3
PS8189E
10/01/04
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B16245 3.3V, 16-Bit, 2-Port NanoSwitchTM
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
PS8189E
10/01/04
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B16245 3.3V, 16-Bit, 2-Port NanoSwitchTM
Ordering Information
Ordering Code PI3B16245A PI3B16245AE PI3B16245V PI3B16245VE Package Code A A V V Package Type 48-pin TSSOP Pb-free & Green, 48-pin TSSOP 48-pin SSOP Pb-free & Green, 48-pin SSOP
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
PS8189E 10/01/04

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