PI5C3308 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 2- Bit Bus Switch with Active Low Enable Product Features Product Description • Near zero propagation delay • 5-Ohm switches connect inputs to outputs • Direct bus connection when switches are ON • Ultra Low Quiescent Power (0.2µA Typical) – Ideally suited for notebook applications • Packages available: – 8-pin plastic SOIC (W) Pericom Semiconductor’s PI5C series of logic circuits are produced using the Company’s advanced submicron CMOS technology, achieving industry leading speed grades. The PI5C3308 is a 2-bit digital switch designed with a fast enable. When enabled via the associated Bus Enable (BE) pin, the “A” pin is directly connected to the “B” pin. The bus switch introduces no additional propagation delay or additional ground bounce noise. The PI5C3308 device has an active LOW enable. PI5C3308 Logic Block Diagram Product Pin Configuration A1 B1 BE1 B2 A2 A1 1 B1 2 BE2 GND 8 Vcc 7 BE1 3 6 B2 4 5 A2 8-Pin W BE2 Truth Table(1) Product Pin Description BE A B Function Pin Name De s cription H Hi- Z Hi- Z Disconnect BE Switch Enable L B A Connect A2- A1 Bus A B2- B1 Bus B VCC Power GND Ground Notes: 1. H = High Voltage Level L = Low Voltage Level Hi-Z = High Impedance X = Don’t Care 1 PS8368B 01/11/01 PI5C3308 2-Bit Bus Switch with Active Low Enable 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Maximum Ratings (Above which the useful life may be impaired. For user guidelines, not tested.) Storage Temperature .......................................................... –65°C to +150°C Ambient Temperature with Power Applied ..........................–40°C to +85°C 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 = –40°C to +85°C, VCC = 5V ± 10%) Parame te rs Te s t Conditions (1) De s cription M in. Typ.(2) M ax. VIH Input HIGH Voltage Guaranteed Logic HIGH Level 2.0 VIL Input LOW Voltage Guaranteed Logic LOW Level - 0.5 IIH Input HIGH Current VCC = Max., VIN = VCC ±1 IIL Input LOW Current VCC = Max., VIN = GND ±1 V 0.8 IOZH High Impedence Output Current VCC = Max., VOUT = 0V or VCC ±1 IOZL Low Impedence Output Current VCC = Max., VOUT = 0V or VCC ±1 VH Input Hysteresis at Control Pins RON Switch On Resistance(3) Units µΑ 300 mV VCC = 4.5V, VIN = 0.0V, ION = 30mA or 64mA 5 7 VCC = 4.5V, VIN = 2.4V, ION = 15mA 10 15 VCC = 4V, VIN = 2.4V, ION = 15mA 14 20 Ω Capacitance (TA = 25°C, f = 1 MHz) Parameters(4) Description Test Conditions Typ. Units CIN COFF Input Capacitance A/B Capacitance, Switch Off VIN = 0V VIN = 0V 3 5 pF pF CON A/B Capacitance, Switch On VIN = 0V 10 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 = 25°C 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 PS8368B 01/11/01 PI5C3308 2-Bit Bus Switch with Active Low Enable 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Power Supply Characteristics Test Conditions(1) Parameters Description ICC Quiescent Power Supply Current ∆ICC VCC = Max. Supply Current per Input @ TTL HIGH VCC = Max. Min. VIN = GND or VCC Typ.(2) Max. Units 0.1 3.0 µA 2.5 mA (3) VIN = 3.4V 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, +25°C 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. Switching Characteristics over Operating Range PI3C3308 Parame te rs Conditions (1) De s cription tPLH tPHL Propogation Delay(2,3) A to B, B to A tPZH tPZL Bus Enable Time tPHZ tPLZ Bus Disable Time C L = 50pF RL = 500Ω VCC = 4.5V Units VCC = 4V M in. M ax. M in. M ax. — 0.25 0.25 1. 0 4.9 5.5 1 4.2 4.5 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. Ordering Information Part Pin - Package Te mpe rature PI5C3308W 8 - SOIC (W) –40ºC to +85ºC Pericom Semiconductor Corporation 2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com 3 PS8368B 01/11/01