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| IDT74CBTLVR3861 LOW-VOLTAGE 10-BIT BUS SWITCH INDUSTRIAL TEMPERATURE RANGE LOW-VOLTAGE 10-BIT BUS SWITCH IDT74CBTLVR3861 PRELIMINARY FEATURES: * * * * * DESCRIPTION: Isolation Under Power-Off Conditions Over-voltage tolerant Latch-up performance exceeds 100mA VCC = 2.3V - 3.6V, normal range ESD >2000V per MIL-STD-883, Method 3015; >200V using machine model (C = 200pF, R = 0) * Available in SSOP, QSOP, and TSSOP packages The CBTLVR3861 is a ten bit high-speed bus switch. It adds an internal series resistor with each switch to reduce reflection noise in high-speed applications. When closed, the switch acts as a source (series) termination for the driver connected to it. The device is organized as one 10-bit bus switch. When output enable (OE) is low, the 10-bit bus switch is on and port A is connected to port B. When OE is high, the switch is open and a high-impedance state exists between the two ports. To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. APPLICATIONS: * 3.3V High Speed Bus Switching and Bus Isolation FUNCTIONAL BLOCK DIAGRAM SIMPLIFIED SCHEMATIC, EACH SWITCH A1 2 SW 22 B1 A10 11 SW 13 B10 A B OE 23 OE INDUSTRIAL TEMPERATURE RANGE 1 c 2002 Integrated Device Technology, Inc. The IDT logo is a registered trademark of Integrated Device Technology, Inc. AUGUST 2002 DSC-5392/9 IDT74CBTLVR3861 LOW-VOLTAGE 10-BIT BUS SWITCH INDUSTRIAL TEMPERATURE RANGE PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS(1) Symbol VCC VI IIK TSTG Description Supply Voltage Range Input Voltage Range Continuous Channel Current Input Clamp Current, VI/O < 0 Storage Temperature Range Max. -0.5 to 4.6 -0.5 to 4.6 128 -50 -65 to +150 Unit V V mA mA C NC A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 GND 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 VCC OE B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 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. FUNCTION TABLE(1) Input OE L H NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level SSOP/ QSOP/ TSSOP TOP VIEW Function A Port = B Port Disconnect OPERATING CHARACTERISTICS(1) Symbol VCC VIH VIL TA Parameter Supply Voltage High-Level Control Input Voltage Low-Level Control Input Voltage Operating Free-Air Temperature VCC = 2.3V to 2.7V VCC = 2.7V to 3.6V VCC = 2.3V to 2.7V VCC = 2.7V to 3.6V NOTE: 1. All unused control inputs of the device must be held at VCC or GND to ensure proper device operation. Test Conditions Min. 2.3 1.7 2 -- -- -40 Max. 3.6 -- -- 0.7 0.8 +85 Unit V V V C 2 IDT74CBTLVR3861 LOW-VOLTAGE 10-BIT BUS SWITCH INDUSTRIAL TEMPERATURE RANGE DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE Following Conditions Apply Unless Otherwise Specified: Operating Condition: TA = -40C to +85C Symbol VIK II IOZ IOFF ICC ICC(2) CI CIO(OFF) VCC = 2.3V Typ. at VCC = 2.5V RON(3) VCC = 3V VI = 2.4V VI = 1.7V VI = 0 Control Inputs Control Inputs Parameter Control Inputs, Data I/O Control Inputs Data I/O Test Conditions VCC = 3V, II = -18mA VCC = 3.6V, VI = VCC or GND VCC = 3.6V, VO = 0V or 3.6V switch disabled VCC = 0V, VI or VO = 0V to 3.6V VCC = 3.6V, IO = 0, VI = VCC or GND VCC = 3.6V, one input at 3V, other inputs at VCC or GND VI = 3V or 0 VO = 3V or 0, OE = VCC VI = 0 IO = 64mA IO = 24mA IO = 15mA IO = 64mA IO = 24mA IO = 15mA Min. -- -- -- -- -- -- -- -- -- -- -- -- -- -- Typ.(1) -- -- -- -- -- -- 4 8 30 30 36 30 30 32 Max. -1.2 1 5 10 10 300 -- -- 47 47 80 42 42 47 Unit V A A A A A pF pF NOTES: 1. Typical values are at 3.3V, +25C ambient. 2. The increase in supply current is attributable to each input that is at the specified voltage level rather than VCC or GND. 3. This is measured by the voltage drop between the A and B terminals at the indicated current through the switch. On-state resistance is determined by the lower of the voltages of the two (A or B) terminals. SWITCHING CHARACTERISTICS VCC = 2.5V 0.2V Symbol tPD(1) tEN tDIS Propagation Delay A to B or B to A Output Enable Time OE to A or B Output DisableTime OE to A or B NOTE: 1. The propagation delay is the calculated RC time constant of the typical on-state resistance of the switch and the specified load capacitance when driven by an ideal voltage source (zero output impededance). VCC = 3.3V 0.3V Min. -- 1 1 Max. 1.5 5.3 5.5 Unit ns ns ns Parameter Min. -- 1 1 Max. 0.9 6 5.5 3 IDT74CBTLVR3861 LOW-VOLTAGE 10-BIT BUS SWITCH INDUSTRIAL TEMPERATURE RANGE TEST CIRCUITS AND WAVEFORMS TEST CONDITIONS Symbol VLOAD VIH VT VLZ VHZ CL VCC = 3.3V0.3V 6 3 1.5 300 300 50 (1) VCC = 2.5V0.2V 2 x Vcc Vcc Vcc / 2 150 150 30 (2) Unit V V V mV mV pF SAME PHASE INPUT TRANSITION tPLH OUTPUT tPLH OPPOSITE PHASE INPUT TRANSITION tPHL tPHL VIH VT 0V VOH VT VOL VIH VT 0V Propagation Delay VCC 500 Pulse(1, 2) Generator VIN D.U.T. RT 500 CL VOUT VLOAD Open GND CONTROL INPUT tPZL OUTPUT SWITCH NORMALLY CLOSED LOW tPZH OUTPUT SWITCH NORMALLY OPEN HIGH VLOAD/2 VT tPHZ VT 0V tPLZ ENABLE DISABLE VIH VT 0V VLOAD/2 VOL + VLZ VOL VOH VOH -VHZ 0V Test Circuits for All Outputs DEFINITIONS: CL = Load capacitance: includes jig and probe capacitance. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator. NOTES: 1. Pulse Generator for All Pulses: Rate 10MHz; tF 2.5ns; tR 2.5ns. 2. Pulse Generator for All Pulses: Rate 10MHz; tF 2ns; tR 2ns. NOTE: 1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH. Enable and Disable Times SWITCH POSITION Test tPLZ/tPZL tPHZ/tPZH tPD Switch VLOAD GND Open 4 IDT74CBTLVR3861 LOW-VOLTAGE 10-BIT BUS SWITCH INDUSTRIAL TEMPERATURE RANGE ORDERING INFORMATION CBTLV X IDT XX Temp. Range Family XXX Device Type XX Package PY Q PG 3861 Shrink Small Outline Package Quarter-size Small Outline Package Thin Shrink Small Outline Package Low-Voltage 10-Bit Bus Switch R 74 25 series dampening resistors on A and B ports -40C to +85C 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 for Tech Support: logichelp@idt.com (408) 654-6459 5 |
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