PI3B16245 Ω) PI3B162245 (25Ω 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 3.3V, Hot Insertion, 16-Bit, 2-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 Fast Switching Speed - 4ns max. Permits Hot Insertion Pin compatible with 74 series16245 Operating Vcc Range: 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 PI3B16245 and PI3B162245 are 3.3 volt, hot-insertion, 16-bit, 2-port bus switches that are 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 switches create no additional propagational delay or additional ground bounce noise. The PI3B162245 device has a built-in 25-ohm series resistor to reduce noise resulting from reflections, thus eliminating the need for an external terminating resistor. Logic Block Diagram Product Pin Configuration 1A0 NC 1B0 1 2 48 47 1BE 46 45 1A1 GND 3 4 1B2 5 44 1A2 1B3 6 7 43 42 1A3 8 9 10 11 41 40 39 38 1A4 1B7 12 1A7 2B0 13 14 15 16 48-Pin 37 A, V 1B0 1B1 1A7 1 B7 VCC 1B4 1B5 GND 1B6 1BE 2A0 2B0 2B1 GND 2B2 2A7 2 B7 2BE Truth Table Function Disconnect Connect nBE H L nA0–7 Hi-Z nB0–7 GND VCC 1A5 GND 1A6 36 35 34 33 2A0 2A3 2A1 GND 2A2 2B3 VCC 2B4 17 18 32 31 19 30 2B5 20 21 22 23 24 29 28 27 26 2A5 25 2BE GND 2B6 2B7 NC (1) 1A0 VCC 2A4 GND 2A6 2A7 Product Pin Description Pin Name nBE nA0-nA7 nB0-nB7 Note: 1. H = High Voltage Level L = Low Voltage Level Hi-Z = High Impedance 1 I/O I I/O I/O Description Bus Enable Input (Active LOW) Bus A Bus B PS8189C 09/13/99 PI3B16245/PI3B162245 3.3V, Hot Insertion, 16-Bit, 2-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 ........................ –0°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. Typ(2) Max. Units VIH Input HIGH Voltage Guaranteed Logic HIGH Level 2.0 — — V VIL Input LOW Voltage Guaranteed Logic LOW Level –0.5 — 0.8 V IIH Input HIGH Current VCC = Max., VIN = VCC — — ±1 µA IIL 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 16245 — 5 8 Ω 162245 20 28 40 16245 — 10 15 162245 20 35 48 RON Switch On Resistance (3) VCC = Min., VIN = 0.0V, ION = 48mA VCC = Min., VIN = 2.4V, ION = 15mA 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 3.0 8.5 pF pF CON A/B Capacitance, Switch On VIN = 0V 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 PS8189C 09/13/99 PI3B16245/PI3B162245 3.3V, Hot Insertion, 16-Bit, 2-Port BusSwitch 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Power Supply Characteristics Test Conditions(1) Parameters Description Min. Typ(2) Max. Units ICC Quiescent Power Supply Current VCC = Max. VIN = GND or VCC 10 µA ∆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 BE = GND 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. Switching Characteristics over Operating Range Com. Parameters Description Conditions(1) tPLH tPHL tPZH tPZL tPHZ tPLZ 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 Min. Max. CL = 50pF 16245 RL = 500Ω 162245 CL = 50pF, RL= 500Ω 1 0.25 1.25 4.5 CL = 50pF, RL= 500Ω 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. Ordering Information Part Pin Package Te mpe rature PI3B16245A 48- TSSO P (A48) - 40°C to +85°C PI3B16245V 48- SSO P (V48) - 40°C to +85°C Pericom Semiconductor Corporation 2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com 3 PS8189C 09/13/99