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IDT74CBTLV6800 LOW-VOLTAGE 10-BIT BUS SWITCH WITH PRECHARGED OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
LOW-VOLTAGE 10-BIT BUS SWITCH WITH PRECHARGED OUTPUTS
FEATURES:
- - - - - - - - Functionally equivalent to QS3800 5 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
IDT74CBTLV6800
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. 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-k 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
B
A10
11
SW
14
B10
OE
1
OE
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
1
c 2001 Integrated Device Technology, Inc.
APRIL 2001
DSC-5739/-
IDT74CBTLV6800 LOW-VOLTAGE 10-BIT BUS SWITCH WITH PRECHARGED OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
Symbol VCC BIASV Description Supply Voltage Range Bias Voltage Range, VI Input Voltage Range Continuous Channel Current IIK TSTG Input Clamp Current, , VI/O < 0 Storage Temperature Max. -0.5 to 4.6 -0.5 to 4.6 -0.5 to 4.6 128 -50
(1)
Unit V V V mA mA C
OE 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 SO24-7 SO24-8 19 SO24-9 18 17 16 15 14 13
VCC B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 BIASV
VI
-65 to +150
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
Input OE L H
(1)
Inputs/Outputs A Port = B Port A Port = Z B Port = BIASV
SSOP/ QSOP/ TSSOP TOP VIEW
OPERATING CHARACTERISTICS
Symbol VCC BIASV VIH VIL TA Parameter Supply Voltage Bias 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 Test Conditions Min. 2.3 1.3 1.7 2 -- -- -40 Max. 3.6 VCC -- -- 0.7 0.8 +85 C V Unit V V V
NOTE: 1. All unused control inputs of the device must be held at VCC or GND to ensure proper device operation.
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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 = - 40C to +85C
Symbol VIK II IOZ IOFF |IO| ICC ICC (1) CI CIO(OFF) VCC = 2.3V Typ at VCC = 2.5V
RON (2)
Parameter Control Inputs, Data I/O Control Inputs, Data I/O 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 = 0, VI or VO = 0 to 3.6V VCC = 3V, BIASV = 2.4V, VO = 0, OE = VCC VCC = 3.6V, IO = 0, VI = VCC or GND
Min. -- -- -- -- 0.25 -- -- -- -- -- -- -- -- -- --
Typ. -- -- -- -- -- -- -- 4 7 5 5 27 5 5 10
Max. - 1.2 1 20 50 -- 10 300 -- -- 8 8 40 7 7 15
Unit V A A A mA A A pF pF
Control Inputs Control Inputs
VCC = 3.6V, One input at 3V, Other inputs at VCC or GND VI = 3V or 0 VO = 3V or 0, Switch Off, BIASV = Open, OE = VCC VI = 0 VI = 1.7V VI = 0 II = 64mA II = 24mA II = 15mA II = 64mA II = 24mA VI = 2.4V II = 15mA
VCC = 3V
NOTES: 1. The increase in supply current is attributable to each input that is at the specified voltage level rather than VCC 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 Min. -- 1 1 1 1 Max. 0.15 4.8 4.8 5.6 5.6 VCC = 3.3V 0.3V Min. -- 1 1 1 1 Max. 0.25 4.5 4.5 5.5 5.5 Unit ns ns ns ns 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).
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IDT74CBTLV6800 LOW-VOLTAGE 10-BIT BUS SWITCH WITH PRECHARGED OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
TEST CIRCUITS AND WAVEFORMS
TEST CONDITIONS
Symbol VLOAD VIH VT VLZ VHZ CL VCC(1)= 3.3V 0.3V 6 3 1.5 300 300 50 VCC(2)= 2.5V 0.2V 2 x Vcc Vcc VCC/2 150 150 30 Unit V V V mV mV pF
OPPOSITE PHASE INPUT TRANSITION tPLH tPHL
PROPAGATION DELAY
SAME PHASE INPUT TRANSITION tPLH OUTPUT tPHL VIH VT 0V VOH VT VOL VIH VT 0V
TEST CIRCUITS FOR ALL OUTPUTS
VCC 500 Pulse Generator
(1, 2)
ENABLE AND DISABLE TIMES
ENABLE DISABLE CONTROL INPUT tPZL OUTPUT SW ITCH NORMALLY CLO SED LOW tPZH OUTPUT SW ITCH NORMALLY OPEN HIGH VLOAD/2 VT tPHZ VT 0V tPLZ VIH VT 0V VLOAD/2 VOL + VLZ VOL VOH VOH -VHZ 0V
VLOAD Open GND
VIN D.U.T.
VOUT
RT
500 CL
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.
SWITCH POSITION
Test
tPLZ/tPZL tPHZ/tPZH tPD
Switch VLOAD GND Open
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IDT74CBTLV6800 LOW-VOLTAGE 10-BIT BUS SWITCH WITH PRECHARGED OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDT XX CBTLV XXX Device Type XX Package Temp. Range
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
-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
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