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PI5C3305
2-Bit Bus Switch with Individual Enables
Product Features
Near zero propagation delay 5-Ohm switches connect inputs to outputs Direct bus connection when switches are ON Ultra Low Quiescent Power (0.2A Typical) - Ideally suited for notebook applications * Packages available: - 8-pin 173 mil wide plastic TSSOP (L) - 8-pin 118 mil wide plastic MSOP (U) * * * *
Product Description
Pericom Semiconductor's PI5C series of logic circuits are produced using the Company's advanced submicron CMOS technology, achieving industry leading speed grades. The PI5C3305 is a 2-bit bus switch designed with two individual 5-ohm bus switches with fast indiviual enables. When enabled via the associated Bus Enable (BE) pin, the "A" pin is directly connected to the "B" pin for that particular gate. The bus switch introduces no additional propagation delay or additional ground bounce noise. The PI5C3305 device has active HIGH enables.
Logic Block Diagram
Product Pin Configuration
A1
B1
BE1
BE1 A1 B1
B2
A2
GND
1 2 3 4
8-Pin L, U
8 7 6 5
VCC BE2 B2 A2
BE2
Product Pin Description
Pin Name BEn A2-A1 B2-B1 Vcc GND Description Switch Enable Bus A Bus B Power Ground
Truth Table(1)
BEn X* L H An Hi-Z Hi-Z Bn Bn Hi-Z Hi-Z An Vcc GND Vcc Vcc Function Disconnect Disconnect Connect
Notes: 1. H = High Voltage Level L = Low Voltage Level Hi-Z = High Impedance X = Don't Care *A pull-up resistor should be provided for power-up protection.
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PS8331C
01/11/01
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C3305 2-Bit Bus Switch with Individual Enables
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 = 4V to 5.5V)
Parameters Description VIH Input HIGH Voltage VIL Input LOW Voltage IIH Input HIGH Current IIL IOZH ION VH RON Input LOW Current Low Impedance Output Current Input Hysteresis at Control Pins Switch On Resistance(3) VCC = 4.5V, VIN = 0.0V, ION = 30mA or 64mA VCC = 4.5V, VIN = 2.4V, ION = 15mA Test Conditions(1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max., VIN = VCC VCC = Max., VIN = GND 0 A, B VCC 150 5 10 7 15 Min. 2.0 -0.5 Typ(2) Max. 0.8 1 1 1 1 Units V V A A A A m V
High Impedance Output Current 0 A, B VCC
Capacitance (TA = 25C, f = 1 MHz)
Parameters(4) CIN COFF CON Description Input Capacitance A/B Capacitance, Switch Off A/B Capacitance, Switch On Test Conditions VIN = 0V VIN = 0V VIN = 0V Typ 3 5 10 Units pF pF pF
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. 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.
Power Supply Characteristics
Parameters Description ICC ICC Quiescent Power Supply Current Supply Current per Input @ TTL HIGH Test Conditions(1) VCC = Max. VCC = Max. VIN = GND or VCC VIN = 3.4V
(3)
Min.
Typ(2) 0.1
Max. 3.0 2.5
Units A mA
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.
2
PS8331C
01/11/01
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C3305 2-Bit Bus Switch with Individual Enables
Switching Characteristics Over Operating Range
PI5C3305 Parame te rs De s cription Conditions (1) VCC =5V 10% M in. tPLH tPHL tPZH tPZL tPHZ tPLZ Propogation Delay(2,3) A to B, B to A Bus Enable Time Bus Disable Time C L = 50pF RL = 500 -- 1. 0 1.0 M ax. 0.25 4.9 4.2 VCC = 4V M in. M ax. 0.25 5.5 4.5 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.
Ordering Information
Part PI5C3305L PI5C3305UX Pin - Package 8 - TSSOP (L) -40C to +85C 8 - MSOP (U) Te mpe rature
Pericom Semiconductor Corporation 2380 Bering Drive * San Jose, CA 95131 * 1-800-435-2336 * Fax (408) 435-1100 * http://www.pericom.com
3
PS8331C 01/11/01

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