PI3B16244 Ω) PI3B162244 (25Ω 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 3.3V, Hot Insertion, 16-Bit, 4-Port BusSwitch Product Features Product Description • • • • • • • • Pericom Semiconductor’s PI3B series of logic circuits are produced using the Company’s advanced 0.35 micron CMOS technology. Near-zero propagation delay 5Ω switches connect inputs to outputs when enabled Fast Switching Speed - 4ns max. Permits Hot Insertion Pin compatible with 74 series16244 Operating Vcc: 3.0V to 3.6V Industrial operating temperature: –40°C to +85°C Packages available: – 48-pin 240 mil wide thin plastic TSSOP (A) – 48-pin 300 mil wide plastic SSOP (V) The PI3B16244 and PI3B162244 are 16-bit, 4-port bus switches that are pin compatible with the 74 series 16244 16-bit driver. Four enable signals (nBE) turn the switches on similar to the enable signals of the 16244. The bus switches create no additional propagation delay or ground bounce noise. The PI3B162244 device has a built-in 25-ohm series resistor to reduce noise because of reflections, thus eliminating the need for an external terminating resistor. Logic Block Diagram Product Pin Configuration 1BE 3BE 1BE 1 48 2BE 1B0 2 47 1A0 1B1 3 4 5 46 45 44 1A1 GND 1A2 1A0 1B0 3A0 3B0 GND 1B2 1A1 1B1 3A1 3B1 1B3 VCC 6 43 7 42 1A3 VCC 2B0 8 41 2A0 2B1 40 39 2A1 GND 9 10 2B2 11 2B3 12 3B0 13 3B1 GND 3B2 14 15 16 3B3 VCC 17 4B0 19 4B1 GND 20 21 4B2 22 1A2 1B2 1A3 1B3 2BE 3A2 3B2 3A3 3B3 4BE 2A0 2B0 4A0 4B0 2A1 2B1 4A1 4B1 2A2 2B2 2A3 2B3 4A2 4B2 4A3 4B3 (1) Truth Table Function Disconnect Connect nBE H L nA0–7 Hi-Z nB0–7 18 4B3 23 4BE 24 48-Pin 38 A, V 37 36 35 34 33 32 31 30 29 28 27 26 25 GND 2A2 2A3 3A0 3A1 GND 3A2 3A3 VCC 4A0 4A1 GND 4A2 4A3 3BE Product Pin Description Note: 1. H = High Voltage Level L = Low Voltage Level Hi-Z = High Impedance 1 Pin Name nBE I/O I nA0-nA7 nB0-nB7 I/O I/O Description Bus Output Enable (Active LOW) Bus A Bus B PS8170B 11/06/98 PI3B16244 Ω) PI3B162244 (25Ω 3.3V, Hot Insertion, 16-Bit, 4-Port BusSwitch 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 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 = –40°C to +85°C, VCC = 3.0V to 3.6V) Test Conditions(1) Parameters Description Min. VIH Input HIGH Voltage Guaranteed Logic HIGH Level 2.0 VIL Input LOW Voltage Guaranteed Logic LOW Level –0.5 IIH Input HIGH Current IIL Typ.(2) Max. Units V 0.8 V VCC = Max., VIN = VCC ±1 µA Input LOW Current VCC = Max., VIN = GND ±1 µA IOZH High Impedance Output Current 0 ≤ A, B ≤ VCC ±1 µA VIK Clamp Diode Voltage VCC = Min., IIN = –18mA –0.7 –1.2 V 5 8 Ω 28 40 10 15 35 48 RON Switch On Resistance (3) VCC = Min., VIN = 0.0V, ION = 48mA 16244 162244 VCC = Min., VIN = 2.4V, ION = 15mA 20 16244 162244 20 Ω Capacitance (TA = 25°C, f = 1 MHz) Parameters(4) CIN COFF CON Description Test Conditions Typ. Units Input Capacitance A/B Capacitance, Switch Off A/B Capacitance, Switch On VIN = 0V VIN = 0V VIN = 0V 3.0 8.5 17.0 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 = 3.3V, 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 PS8170B 11/06/98 PI3B16244 Ω) PI3B162244 (25Ω 3.3V, Hot Insertion, 16-Bit, 4-Port BusSwitch 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Power Supply Characteristics Test Conditions(1) Parameters Description Min. Typ(2) Max. Units 10 µA ICC Quiescent Power Supply Current VCC = Max. VIN = GND or VCC — ∆ICC Supply Current per Input @ TTL HIGH VCC = Max. VIN = 3.0V(3) — — 750 µA ICCD Supply Current per Input per MHz(4) VCC = Max., A and B Pins Open Control Input Toggling 50% Duty Cycle — — 0.25 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, +25°C 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. PI3B16244 Switching Characteristics over Operating Range Parameters tPLH tPHL tPZH tPZL tPHZ tPLZ Description Propagation Delay(2,3) Ax to Bx, Bx to Ax Bus Enable Time BE to Ax or Bx Bus Disable Time BE to Ax or Bx Conditions(1) Min. CL = 50pF 16244 RL = 500Ω 162244 CL = 50pF RL = 500Ω, R = 500Ω Com. Max. 1 0.25 1.25 4.5 1 5.0 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 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. Pericom Semiconductor Corporation 2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com 3 PS8170B 11/06/98