IDT74CBTLV6800 LOW-VOLTAGE 10-BIT BUS SWITCH WITH PRECHARGED OUTPUTS INDUSTRIAL TEMPERATURE RANGE LOW-VOLTAGE 10-BIT BUS SWITCH WITH PRECHARGED OUTPUTS IDT74CBTLV6800 FEATURES: DESCRIPTION: − − − − − − − The CBTLV6800 provides 10-bits of high-speed bus switching with low on-state resistance of the switch allowing connections to be made with minimal propagation delay. The device also precharges the B port to a user-selectable bias voltage (BIASV) to minimize live-insertion noise. Functionally equivalent to QS3800 5Ω A/B bi-directional switch 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 CBTLV6800 is organized as a single 10-bit bus switch with a single output-enable (OE) input. When 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, and port B is precharged to BIASV through the equivalent of a 10-kΩ resistor. 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 13 A1 2 23 SW BIA SV B1 A A10 OE 11 SW 14 B B10 1 OE INDUSTRIAL TEMPERATURE RANGE APRIL 2001 1 c 2001 Integrated Device Technology, Inc. DSC-5739/- IDT74CBTLV6800 LOW-VOLTAGE 10-BIT BUS SWITCH WITH PRECHARGED OUTPUTS INDUSTRIAL TEMPERATURE RANGE ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION 24 OE 1 A1 2 23 B1 A2 3 22 B2 A3 4 21 B3 A4 5 20 B4 A5 6 A6 7 SO24-7 SO24-8 19 SO24-9 18 A7 8 17 B7 A8 9 16 B8 A9 10 15 B9 A 10 11 14 B 10 GND 12 13 BIASV V CC (1) Symbol VCC Description Supply Voltage Range Max. –0.5 to 4.6 Unit V BIASV Bias Voltage Range, VI –0.5 to 4.6 V VI Input Voltage Range –0.5 to 4.6 V Continuous Channel Current 128 mA IIK Input Clamp Current, , VI/O < 0 –50 mA TSTG Storage Temperature –65 to +150 °C 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. B5 B6 FUNCTION TABLE (1) Input OE Inputs/Outputs L A Port = B Port H A Port = Z B Port = BIASV SSOP/ QSOP/ TSSOP TOP VIEW OPERATING CHARACTERISTICS Symbol VCC Min. 2.3 Max. 3.6 Unit Supply Voltage BIASV Bias Voltage 1.3 VCC V VIH High-Level Control Input Voltage V Parameter VIL Low-Level Control Input Voltage TA Operating Free-Air Temperature Test Conditions VCC = 2.3V to 2.7V 1.7 — VCC = 2.7V to 3.6V 2 — VCC = 2.3V to 2.7V — 0.7 VCC = 2.7V to 3.6V — 0.8 −40 +85 NOTE: 1. All unused control inputs of the device must be held at VCC or GND to ensure proper device operation. 2 V V °C IDT74CBTLV6800 LOW-VOLTAGE 10-BIT BUS SWITCH WITH PRECHARGED OUTPUTS INDUSTRIAL TEMPERATURE RANGE DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE Following Conditions Apply Unless Otherwise Specified: Operating Condition: TA = – 40°C to +85°C Symbol VIK Parameter Control Inputs, Data I/O Test Conditions VCC = 3V, II = −18mA Min. — Typ. — Max. – 1.2 Unit V II Control Inputs, Data I/O VCC = 3.6V, VI = VCC or GND — — ±1 µA IOZ Data I/O VCC = 3.6V, VO = 0V or 3.6V switch disabled — — ±20 µA — — 50 µA 0.25 — — mA VCC = 3.6V, IO = 0, VI = VCC or GND — — 10 µA — — 300 µA IOFF VCC = 0, VI or VO = 0 to 3.6V |IO| VCC = 3V, BIASV = 2.4V, VO = 0, OE = VCC ICC ∆ICC (1) Control Inputs VCC = 3.6V, One input at 3V, Other inputs at VCC or GND CI Control Inputs VI = 3V or 0 — 4 — pF VO = 3V or 0, Switch Off, BIASV = Open, OE = VCC — 7 — pF VI = 0 — 5 8 CIO(OFF) VCC = 2.3V II = 64mA Typ at VCC = 2.5V RON (2) II = 24mA — 5 8 VI = 1.7V II = 15mA — 27 40 VI = 0 II = 64mA — 5 7 II = 24mA — 5 7 II = 15mA — 10 15 VCC = 3V VI = 2.4V Ω NOTES: 1. The increase in supply current is attributable to each input that is at the specified voltage level rather than V CC or GND. 2. 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) tPZH tPZL tPHZ tPLZ Parameter Propagation Delay A to B or B to A BIASV = GND OE to A or B BIASV = 3V OE to A or B BIASV = GND OE to A or B BIASV = 3V OE to A or B VCC = 3.3V ± 0.3V Min. — Max. 0.15 Min. — Max. 0.25 Unit ns 1 4.8 1 4.5 ns 1 4.8 1 4.5 ns 1 5.6 1 5.5 ns 1 5.6 1 5.5 ns 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). 3 IDT74CBTLV6800 LOW-VOLTAGE 10-BIT BUS SWITCH WITH PRECHARGED OUTPUTS INDUSTRIAL TEMPERATURE RANGE TEST CIRCUITS AND WAVEFORMS PROPAGATION DELAY TEST CONDITIONS Symbol VLOAD VCC(1)= 3.3V ± 0.3V 6 VCC(2)= 2.5V ± 0.2V 2 x Vcc Unit V VIH 3 Vcc V VT 1.5 VCC/2 V VLZ 300 150 mV VHZ 300 150 mV CL 50 30 pF SAME PHASE INPUT TRANSITION 500 Ω DISABLE CONTROL INPUT GND t PZL D.U.T. OUTPUT SW ITCH NORMALLY CLO SED LOW t PZH OUTPUT SW ITCH NORMALLY OPEN HIGH 500 Ω CL DEFINITIONS: CL = Load capacitance: includes jig and probe capacitance. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator. SWITCH POSITION tPLZ/tPZL Switch VLOAD tPHZ/tPZH GND tPD Open t PLZ V IH VT 0V V LOAD/2 V LOAD/2 VT V OL + V LZ V OL tPHZ VT V OH V OH - V HZ 0V 0V NOTE: 1. Diagram shown for input control Enable-LOW and input Control Disable-HIGH. 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. Test V IH VT 0V ENABLE V OUT RT t PHL V OH VT V OL ENABLE AND DISABLE TIMES Open Pulse Generator tPLH V LOAD V CC (1, 2) tPHL OPPOSITE PHASE INPUT TRANSITION TEST CIRCUITS FOR ALL OUTPUTS V IN tPLH OUTPUT V IH VT 0V 4 IDT74CBTLV6800 LOW-VOLTAGE 10-BIT BUS SWITCH WITH PRECHARGED OUTPUTS INDUSTRIAL TEMPERATURE RANGE ORDERING INFORMATION IDT XX Temp. Range CBTLV XXX XX Device Type Package PY Q PG Shrink Small Outline Package (SO20-7) Quarter-size Small Outline Package (SO20-8) Thin Shrink Small Outline Package (SO20-9) 6800 Low-Voltage 10-Bit Bus Switch with Precharged Outputs 74 –40°C to +85°C 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* *To search for sales office near you, please click the sales button found on our home page or dial the 800# above and press 2. The IDT logo is a registered trademark of Integrated Device Technology, Inc. 5