IDTQS34XV245 3.3V HIGH SPEED 32-BIT MULTIWIDTH BUS SWITCH INDUSTRIAL TEMPERATURE RANGE QUICKSWITCH® PRODUCTS 3.3V HIGH SPEED 32-BIT MULTIWIDTH™ BUS SWITCH FEATURES: DESCRIPTION: 5Ω Ω bidirectional switches connect inputs to outputs Pin compatibility with QS3245 250ps propagation delay Undershoot clamp diodes on all switch and control inputs LVTTL-compatible control inputs Available in 80-pin QVSOP package • • • • • • IDTQS34XV245 The QS34XV245 is a set of 32-bit high speed bus switches controlled by LVTTL-compatible active low enable signal. When closed, the switches exhibit near zero propagation delay without generating additional ground bounce or switching noise. The QS34XV245 is specially designed for direct interface betweeen 3.3V and 2.5V devices without any external components. When operating from a 3.3V supply, the logic high level at the switch output is clamped to 2.5V when the switch input signal exceeds 2.5V. This device can be used for switching 2.5V buses without signal attenuation. The ON resistance at 3.3V VCC is less than 5Ω typical, providing near zero propagation delay through the switch. Absence of DC path from switch I/O pins to VCC or ground makes QS34XV245 an ideal device for hot swapping applications. The QS34XV245 is characterized for operation from -40°C to +85°C. APPLICATIONS: • 3.3V to 2.5V Voltage translation • 2.5V to 1.8V Voltage translation • PCI bus isolation hot swap FUNCTIONAL BLOCK DIAGRAM A0 A1 A2 A3 A4 A5 A6 A7 A 16 A 17 A 18 A 19 A 20 A 21 A 22 A 23 B7 B 16 B 17 B 18 B 19 B 20 B 21 B 22 B 23 A 13 A 14 A 15 A 24 A 25 A 26 A 27 A 28 A 29 A 30 A 31 B24 B25 B 26 B 27 B 28 B 29 B 30 B 31 OE 1 OE 3 B0 B1 A8 A9 B2 B3 B4 A 10 A 11 A 12 B5 B6 OE 2 OE 4 B8 B9 B 10 B 11 B 12 B 13 B 14 B 15 The IDT logo is a registered trademark of Integrated Device Technology, Inc. INDUSTRIAL TEMPERATURE RANGE NOVEMBER 1999 1 c 1999 Integrated Device Technology, Inc. DSC-5580/1 IDTQS34XV245 3.3V HIGH SPEED 32-BIT MULTIWIDTH BUS SWITCH INDUSTRIAL TEMPERATURE RANGE PIN CONFIGURATION NC 1 ABSOLUTE MAXIMUM RATINGS(1) 80 Symbol Description Vcc VTERM(2) Supply Voltage to Ground OE 1 VTERM(3) DC Switch Voltage Vs –0.5 to +4.6 V VTERM(3) DC Input Voltage VIN –0.5 to +4.6 V VAC AC Input Voltage (pulse width ≤ 20ns) –3 V IOUT DC Output Current 120 mA 0.92 W –65 to +150 °C A0 2 A1 3 78 B0 A2 4 77 B1 A3 5 76 B2 A4 6 PMAX Maximum Power Dissipation (TA = 85°C) 75 B3 TSTG Storage Temperature A5 7 74 B4 A6 8 73 B5 A7 9 72 B6 GN D 10 NC 11 79 71 B7 70 Vcc 69 OE 2 68 B8 67 B9 66 B 10 65 B 11 64 B 12 63 B 13 Max Unit –0.5 to +4.6 V 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. A8 12 A9 13 A 10 14 A 11 15 A 12 16 A 13 17 A 14 18 A 15 19 62 B 14 20 61 B 15 Pins Typ. Max.(1) Unit Control Pins 4 6 pF 5 7 pF GN D CAPACITANCE (TA = +25°C, f = 1.0MHZ, VIN = 0V, VOUT = 0V) NC 21 60 Vcc A 16 22 59 OE 3 A 17 23 58 B 16 A 18 24 57 B 17 A 19 25 56 B 18 A 20 26 55 B 19 A 21 27 54 B 20 A 22 28 53 B 21 A 23 29 52 B 22 GN D 30 51 B 23 NC 31 50 Vcc A 24 32 49 OE 4 A 25 33 48 B 24 A 26 34 47 B 25 35 OEn Function A 27 46 B 26 H Disconnected A 28 36 45 B 27 L An = Bn A 29 37 44 B 28 A 30 38 43 B 29 A 31 39 42 B 30 GN D 40 41 B 31 Quickswitch Channels (Switch OFF) NOTE: 1. This parameter is measured at characterization but not tested. PIN DESCRIPTION Pin Names Description Output Enable OE An, Bn Data I/Os FUNCTION TABLE(1) NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level MILLIPAQ TOP VIEW 2 IDTQS34XV245 3.3V HIGH SPEED 32-BIT MULTIWIDTH BUS SWITCH INDUSTRIAL TEMPERATURE RANGE DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE Following Conditions Apply Unless Otherwise Specified: Industrial: TA = –40°C to +85°C, VCC = 3.3V ± 0.3V Symbol Parameter Test Conditions Min. Typ.(1) Max. Unit 2 — — V VIH Input HIGH Level Guaranteed Logic HIGH for Control Pins VIL Input LOW Level Guaranteed Logic LOW for Control Pins — — 0.8 V IIN Input LeakageCurrent (Control Inputs) 0V ≤ VIN ≤ VCC — — 1 µA IOZ Off-State Output Current (Hi-Z) 0V ≤ VOUT ≤ VCC, Switches OFF — 0.001 1 µA RON Switch ON Resistance VP Pass Voltage(2) VCC = Min., VIN = 0V, ION = 8mA VCC = Min., VIN = 1.7V, ION = 8mA VCC = 2.3V, VIN = 0V, ION = 8mA VCC = 2.3V, VIN = 1.3V, ION = 8mA VIN = VCC = 3.3V, IOUT = -5µA VIN = VCC = 2.5V, IOUT = -5µA — — — — 2.5 — 5 15 7 25 2.7 1.8 7 20 — — 2.9 — Ω V NOTES: 1. Typical values are at VCC = 3.3V, TA = 25°C. 2. Pass Voltage is guaranteed but not production tested. POWER SUPPLY CHARACTERISTICS Symbol Test Conditions(1) Parameter Max. Unit ICCQ Quiescent Power Supply Current VCC = Max., VIN = GND or Vcc, f = 0 12 µA ∆ICC Power Supply Current per Control Input HIGH (2) VCC = Max., VIN = 3V or Vcc, f = 0 50 µA ICCD Dynamic Power Supply Current per MHz(3) 0.15 mA/MHz VCC = Max., A and B pins open Control Inputs Toggling at 50% Duty Cycle NOTES: 1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics. 2. Per TLL driven input (VIN = 3.4V, control inputs only). A and B pins do not contribute to ∆Icc. 3. 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 inputs generate no significant AC or DC currents as they transition. This parameter is guaranteed but not production tested. 3 IDTQS34XV245 3.3V HIGH SPEED 32-BIT MULTIWIDTH BUS SWITCH INDUSTRIAL TEMPERATURE RANGE SWITCHING CHARACTERISTICS OVER OPERATING RANGE TA = -40°C to +85°C, VCC = 3.3V ± 0.3V; CLOAD = 50pF, RLOAD = 500Ω unless otherwise noted. Symbol Parameter tPLH Data Propagation Delay (2,3) tPHL An to/from Bn tPZL Switch Turn-on Delay tPZH OEn to An/Bn tPLZ Switch Turn-off Delay (2) tPHZ OEn to An/Bn Min. (1) Typ. Max. Unit — — 0.25 ns 0.5 — 6.5 ns 0.5 — 4 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 0.25ns for CL = 30pF. 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. TYPICAL ON RESISTANCE vs VIN AT VCC = 3.3V 16 14 12 R ON - (ohms ) 10 8 6 4 2 0 0. 0.5 1 1.5 V IN - (Volts) 4 2 2.5 IDTQS34XV245 3.3V HIGH SPEED 32-BIT MULTIWIDTH BUS SWITCH INDUSTRIAL TEMPERATURE RANGE OUTPUT VI CHARACTERISTICS V O U T (V o lts ) 2 250 200 -1 0 0 IO s - (mA) IOs - (mA) 1 -5 0 150 100 50 3 -1 5 0 -2 0 0 -2 5 0 0 -3 0 0 0 0 .5 1 2 1 .5 V O U T ( V o lts ) Outputs High Characteristic Outputs Low Characteristic PASS VOLTAGE vs VCC V O UT - (Volts) 3 2.5 V O UT = 2.5V @ V C C = 3.3V V OUT = 1.8V @ V CC = 2.5V 2 1.5 2.2 2.4 2.7 3 V CC (V) 5 3.3 3.6 4 IDTQS34XV245 3.3V HIGH SPEED 32-BIT MULTIWIDTH BUS SWITCH INDUSTRIAL TEMPERATURE RANGE 3.3V TO 2.5V VOLTAGE TRANSLATION 3.3V 2.5V QS34XV245 2.5V 2.5V 3.3V Supply 2.5V Switch Output 3.3V V OUT V IN 3.3V 0V Switch Input 2.5V TO 1.8V VOLTAGE TRANSLATION 2.5V V OUT 1.8V QS34XV245 1.8V 1.8V 1.8V Switch Output 2.5V V IN 0V 6 2.5V Supply 2.5V Switch Input IDTQS34XV245 3.3V HIGH SPEED 32-BIT MULTIWIDTH BUS SWITCH INDUSTRIAL TEMPERATURE RANGE ORDERING INFORMATION IDTQS XXXXX XX Device Type Package X Process CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054 Blank Industrial (-40°C to +85°C ) Q3 80-Pin MillipaQ 34XV245 3.3V H igh Speed 32-Bit M ultiwidth Bus Switch for SALES: 800-345-7015 or 408-727-6116 fax: 408-492-8674 www.idt.com 7 for Tech Support: [email protected] (408) 654-6459