View PI3B3257_136019.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B3257
3.3V, Quad 2:1 Mux/Demux Bus Switch
Product Features
Near zero propagation delay 5-ohm switches connect inputs to outputs Fast Switching Speed: 4.8ns max. Ultra-Low Quiescent Power: 0.1A typical Ideally suited for notebook applications Pin compatible with 74 series 257 logic devices Packages available: 16-pin 150 mil wide plastic QSOP (Q) 16-pin 150 mil wide plastic SOIC (W) 16-pin 173 mil wide plastic TSSOP (L)
Product Description
Pericom Semiconductors PI3B series of logic circuits are produced using the Companys advanced submicron CMOS technology, achieving industry leading performance. The PI3B3257 is a 3.3 Volt, Quad 2:1 multiplexer/demultiplexer with three-state outputs that is pinout and function compatible with the PI74FCT257T, 74F257, and 74ALS/AS/LS257. Inputs can be connected to outputs with low ON resistance (5 ohms) with no additional ground bounce noise or propagation delay.
Logic Block Diagram
IA0 IA1 IB0 IB1 IC0 IC1 ID0 ID1
16-Pin Product Configuration
S IA0 IA1 YA IB0 1 2 3 4 5 6 7 8 16 15 14 16-Pin 13 Q, W, L 12 11 10 9 VCC E ID0 ID1 YD IC0 IC1 YC
E
IB1 YB GND
S
Product Pin Description
YA YB YC YD
Pin Name IAn- IDn S E
De s cription Data Inputs Select Inputs Enable Data Outputs Ground Power No Connect
Truth Table(1)
E H L L S X L H YA Hi- Z IA0 IA1 YB Hi- Z IB0 IB1 YC Hi- Z IC0 IC1 YD Hi- Z ID0 ID1 Function Disable S=0 S=1
YA- YD GND Vcc NC
Note: 1. H = High Voltage Level L = Low Voltage Level
1
PS8151F 05/07/01
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B3257 3.3V, Quad 2:1 Mux/Demux 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 ................................................. 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 =3.3V 10%)
Parame te rs VIH VIL IIH IIL IOZH VIK RON De s cription Input HIGH Voltage Input LOW Voltage Input HIGH Current Input LOW Current Clamp Diode Voltage Switch ON Resistance(3) Te s t Conditions (1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max., VIN = VCC VCC = Max., VIN = GND VCC = Min., IIN = 18mA VCC = Min., VIN = 0.0V, ION = 48mA or 64mA VCC = Min., VIN = 2.4V, ION = 15mA 5 10 M in. 2.0 0.5 0.8 1 1 1 1.2 8 17 V A Typ.(2) M ax. Units V
High Impedance Output Current 0 IN, YN VCC
Capacitance (TA = 25C, f = 1 MHz)
Parame te rs CIN COFFYN COFFIN CON D e s cription Input Capacitance YN Capacitance, Switch O ff IN Capacitance, Switch O ff IN/YN Capacitance, Switch O n Te s t Conditions VIN =0V VIN =0V VIN =0V VIN =0V Typical 3.0 17.0 8.5 25.0 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 I and Y pin at indicated current through the switch. ON resistance is determined by the lower of the voltages on the two (I,Y) pins. 4. This parameter is determined by device characterization but is not production tested.
2
PS8151F
05/07/01
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B3257 3.3V, Quad 2:1 Mux/Demux Bus Switch
Power Supply Characteristics
Parame te rs ICC ICC De s cription Quiescent Power Supply Current Supply Current per Input @ TTL HIGH(3,4) Te s t Conditions (1) VCC = Max. VIN = GND or VCC VCC = Max. VIN = 3.0V M in. Typ(2) 0.1 M ax. 3.0 750 Units A
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); I and Y 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 I and Y 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
PI3B3257 Parame te rs tIY tSY tPZH tPZL tPHZ tPLZ D e s cription Propagation Delay In to Yn Bus Select Time, Sn to Yn Bus Enable Time, E to Yn Bus Disable Time, E to Yn CL = 50pF RL = 500
(2,3)
Conditions (1) M in. 1 1 1
Com. M ax. 0.25 4.5 4.5 4.8
Units
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 switchs time constant 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.
3
PS8151F
05/07/01
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B3257 3.3V, Quad 2:1 Mux/Demux Bus Switch
16-Pin QSOP (Q) Package
16
.008 0.20 MIN.
.150 .157
3.81 3.99
.008 .013 0.20 0.33 Guage Plane
.010 0.254
1 .189 .197 4.80 5.00
Detail A
.016 .035 0.41 0.89
.041 1.04 REF
0-6
.015 x 45 0.38
.008 0.203 REF
.053 1.35 .069 1.75 0.41 .016 1.27 .050 .228 .244 5.79 6.19
Detail A
.007 .010
0.178 0.254
SEATING PLANE .004 0.101 .010 0.254
.025 BSC 0.635
.008 .012 0.203 0.305
X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS
16-Pin SOIC (W) Package
16
.149 .157
3.78 3.99 .0099 .0196 0.25 x 45 0.50
1 .386 .393 9.80 10.00 .0155 .0260 0.393 0.660 REF .053 .068 1.35 1.75 SEATING PLANE 0-8 0.41 1.27 .016 .050 .0075 .0098 0.19 0.25
.2284 .2440 5.80 6.20
.050 BSC 1.27
.013 .020 0.330 0.508
.0040 0.10 .0098 0.25
X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS
4
PS8151F
05/07/01
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B3257 3.3V, Quad 2:1 Mux/Demux Bus Switch
16-Pin TSSOP (L) Package
16
.169 .177
4.3 4.5
1 .193 .201 4.9 5.1 .004 .008 .047 max. 1.20 SEATING PLANE 0.45 .018 0.75 .030 .252 BSC 6.4
0.09 0.20
.0256 BSC 0.65
.007 .012 0.19 0.30
.002 .006
0.05 0.15 X.XX DENOTES CONTROLLING X.XX DIMENSIONS IN MILLIMETERS
Ordering Information
Part PI3B3257Q PI3B3257W PI3B3257L Pin-Package 16 - Q SO P(Q ) 16 - SO IC (W) 16 - TSSO P (L) Width 150- mil 150- mil 173- mil
Pericom Semiconductor Corporation 2380 Bering Drive * San Jose, CA 95131 * 1-800-435-2336 * Fax (408) 435-1100 * http://www.pericom.com
5
PS8151F 05/07/01

▲Up To Search▲

Price & Availability of PI3B3257

	To Download PI3B3257 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .