IDTQS32X2861 HIGH-SPEED CMOS 20-BIT BUS SWITCH WITH FLOW-THROUGH PINOUT INDUSTRIAL TEMPERATURE RANGE QUICKSWITCH® PRODUCTS HIGH-SPEED CMOS 20-BIT BUS SWITCH WITH FLOW-THRU PINOUT IDTQS32X2861 FEATURES: DESCRIPTION: • • • • The QS32X2861 provides two sets of ten high-speed CMOS TTLcompatible bus switches. The low ON resistance of the QS32X2861 allows inputs to be connected to outputs without adding propagation delay and without generating additional ground bounce noise. The QS32x2861 adds an internal 25Ω series termination resistor to each switch to reduce reflection noise in high-speed applications. The Bus Enable (BEn) signals turn the switches on. The QS32X2861 bus switch is ideal for switching digital buses, as well as for hotplug buffering and 5V to 3V conversion. The QS32X2861 is characterized for operation at -40°C to +85°C. Enhanced N channel FET with no inherent diode to Vcc Ω series resistors for low noise 25Ω Undershoot clamp diodes on all switch and control inputs Available in 48-pin QVSOP package APPLICATIONS: • • • • • • Hot-swapping, hot-docking Voltage translation (5V to 3.3V) Power conservation Capacitance reduction and isolation Bus isolation Clock gating FUNCTIONAL BLOCK DIAGRAM A0 B0 A9 B9 BE 1 A 10 B 10 A 19 B 19 BE 2 The IDT logo is a registered trademark of Integrated Device Technology, Inc. INDUSTRIAL TEMPERATURE RANGE MARCH 2002 1 c 2002 Integrated Device Technology, Inc. DSC-5727/2 IDTQS32X2861 HIGH-SPEED CMOS 20-BIT BUS SWITCH WITH FLOW-THROUGH PINOUT PIN CONFIGURATION INDUSTRIAL TEMPERATURE RANGE ABSOLUTE MAXIMUM RATINGS(1) Symbol Description Max Unit VTERM(2) Supply Voltage to Ground –0.5 to +7 V VTERM(3) DC Switch Voltage Vs –0.5 to +7 V VTERM(3) DC Input Voltage VIN –0.5 to +7 V NC 1 48 VCC A0 2 47 BE1 A1 3 46 B0 VAC AC Input Voltage (pulse width ≤ 20ns) –3 V A2 4 45 B1 IOUT DC Output Current 120 mA A3 5 44 B2 PMAX Maximum Power Dissipation (TA = 85°C) 0.5 W A4 6 43 B3 TSTG Storage Temperature –65 to +150 °C A5 7 42 B4 A6 8 41 B5 A7 9 40 B6 A8 10 39 B7 A9 11 38 B8 GND 12 37 B9 NOTE: 1. Stresses greater than those listed under ABSOLUTE 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. 2. Vcc terminals. 3. All terminals except Vcc. NC 13 36 VCC A10 14 35 BE2 A11 15 34 B10 A12 16 33 B11 CAPACITANCE A13 17 32 B12 (TA = +25°C, f = 1.0MHZ, VIN = 0V, VOUT = 0V) A14 18 31 B13 A15 19 30 B14 A16 20 29 B15 A17 21 28 B16 A18 22 27 B17 A19 23 26 B18 GND 24 25 B19 QVSOP TOP VIEW Pins Typ. Max.(1) Unit Control Pins 3 5 pF 5 7 pF Quickswitch Channels (Switch OFF) NOTE: 1. This parameter is measured at characterization but not tested. PIN DESCRIPTION Pin Names I/O Description A0 - A19 I/O Bus A B0 - B19 I/O Bus B BEn I Bus Enable FUNCTION TABLE(1) BE1 BE2 A 0 - A9 A10 - A19 Function L L B0 - B9 B10 - B19 Connect L H B0 - B9 Z Connect H L Z B10 - B19 Connect H H Z Z Disconnect NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level Z = High-Impedance 2 IDTQS32X2861 HIGH-SPEED CMOS 20-BIT BUS SWITCH WITH FLOW-THROUGH PINOUT INDUSTRIAL TEMPERATURE RANGE DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE Following Conditions Apply Unless Otherwise Specified: Industrial: TA = –40°C to +85°C, VCC = 5.0V ±5% Symbol Parameter Test Conditions VIH Input HIGH Level Guaranteed Logic HIGH for Control Pins VIL Input LOW Level Guaranteed Logic LOW for Control Pins IIN Input LeakageCurrent (Control Inputs)(2) 0V ≤ VIN ≤ VCC IOZ Off-State Output Current (Hi-Z) Switch ON Resistance RON(3) VP Pass Voltage(2) Min. Typ.(1) Max. Unit 2 — — V — — 0.8 V — ±0.01 ±1 µA 0V ≤ VOUT ≤ VCC, Switches OFF — ±0.01 ±1 µA VCC = Min., VIN = 0V, ION = 30mA VCC = Min., VIN = 2.4V, ION =15mA VIN = VCC = 5V, IOUT = -5µA 15 18 3.7 20 25 4 35 40 4.2 Ω NOTES: 1. Typical values are at VCC = 5.0V, TA = 25°C. 2. Pass Voltage is guaranteed but not production tested. 3. ROUT changed on March 8, 2002. See rear page for more information. TYPICAL ON RESISTANCE vs VIN AT VCC = 5V 80 R ON (ohms) 70 60 50 40 30 20 10 0 0.0 0.5 1.0 1.5 2.0 V IN (Volts) 3 2.5 3.0 3.5 V IDTQS32X2861 HIGH-SPEED CMOS 20-BIT BUS SWITCH WITH FLOW-THROUGH PINOUT INDUSTRIAL TEMPERATURE RANGE POWER SUPPLY CHARACTERISTICS Symbol Test Conditions(1) Parameter Typ(2) Max. Unit ICCQ Quiescent Power Supply Current VCC = Max., VIN = GND or Vcc, f = 0 0.2 6 µA ∆ICC Power Supply Current per Control Input HIGH(3) VCC = Max., VIN = 3.4V, f = 0 — 2.5 mA ICCD Dynamic Power Supply Current per MHz(4) VCC = Max., A and B pins open — 0.25 mA/MHz BEn Control Input Toggling at 50% Duty Cycle NOTES: 1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics. 2. Typical values are at VCC = 5.0V, 25°C ambient. 3. Per TLL 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 represents the current required to switch internal capacitance at the specified frequency. The A and B pins generate no significant AC or DC currents as they transition. This parameter is guaranteed but not production tested. SWITCHING CHARACTERISTICS OVER OPERATING RANGE TA = -40°C to +85°C, VCC = 5.0V ± 5%; CLOAD = 50pF, RLOAD = 500Ω unless otherwise noted. Symbol Parameter tPLH Data Propagation Delay (2,3) tPHL An to/from Bn tPZH Switch Turn-on Delay tPZL BEn to An/Bn tPHZ Switch Turn-off Delay (2) tPLZ BEn to An/Bn Min. (1) Typ. Max. Unit — 1.25 — ns 1.5 — 7.5 ns 1.5 — 6.5 ns NOTES: 1. Minimums are guaranteed but not production tested. 2. This parameter is guaranteed but not production tested. 3. The bus switch contributes no propagation 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 1.25ns for CL = 50pF. Since this time constant is much smaller than the rise and fall times of typical driving signals, it adds very little propagation delay to the system. Propagation 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. 4 IDTQS32X2861 HIGH-SPEED CMOS 20-BIT BUS SWITCH WITH FLOW-THROUGH PINOUT INDUSTRIAL TEMPERATURE RANGE ORDERING INFORMATION IDTQS XXXXX Device Type XX Package X Process Blank Industrial (-40°C to +85°C) Q1 48-Pin QVSOP 32X2861 High Speed CMOS 20-Bit Bus Switch with Flow-Through Pinout As per PCN L0201-02, the Output Resistance (RON) specifications have changed as of March 8, 2002. The original specifications were: Parameter RON Description Min. Typ. Max. Unit Ω VCC = Min, VIN = 0V, ION = 30mA — 28 35 VCC = Min, VIN = 2.4V, ION = 15mA — 35 40 CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054 for SALES: 800-345-7015 or 408-727-6116 fax: 408-492-8674 www.idt.com 5 for Tech Support: [email protected] (408) 654-6459