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IDT74CBTLV16800 LOW-VOLTAGE 20-BIT BUS SWITCH WITH PRECHARGED OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
LOW-VOLTAGE 20-BIT BUS SWITCH WITH PRECHARGED OUTPUTS
FEATURES:
* * * * * *
IDT74CBTLV16800 PRELIMINARY
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, TSSOP, and TVSOP packages
DESCRIPTION:
APPLICATIONS:
* 3.3V High Speed Bus Switching and Bus Isolation
The CBTLV16800 provides 20-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 CBTLV16800 is organized as dual 10-bit bus switches with two different output-enable (OE) control inputs. When OE is low, the corresponding 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.
FUNCTIONAL BLOCK DIAGRAM
1 1A1 2
SW
SIMPLIFIED SCHEMATIC, EACH SWITCH
BIASV 1B1
46
1A10
12
SW
36
1B10
A
B
1OE
48
2A1
13
SW
35
2B1
OE
2A10
24
SW
25
2B10
2OE
1
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-5886/5
IDT74CBTLV16800 LOW-VOLTAGE 20-BIT BUS SWITCH WITH PRECHARGED OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS(1)
Symbol VCC Description Supply Voltage Range Bias Voltage Range, VI Input Voltage Range Continuous Channel Current IIK TSTG Input Clamp Current, VI/O < 0 Storage Temperature Range Max. -0.5 to 4.6 -0.5 to 4.6 -0.5 to 4.6 128 -50 -65 to +150 Unit V V V mA mA C
BIASV
1A1 1A2 1A3 1A4 1A5 1A6
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25
1OE 2OE
1B1 1B2 1B3 1B4 1B5
BIASV VI
GND
1A7 1A8 1A9 1A10 2A1 2A2
GND
1B6 1B7 1B8 1B9 1B10 2B1 2B2 2B3
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.
VCC
2A3
FUNCTION TABLE (EACH 10-BIT BUS SWITCH)(1)
Input OE L H
NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level Z = High-Impedance
Inputs/Outputs A-Port = B-Port A-Port = Z B-Port = BIASV
GND
2A4 2A5 2A6 2A7 2A8 2A9 2A10
GND
2B4 2B5 2B6 2B7 2B8 2B9 2B10
SSOP/ TSSOP/ TVSOP TOP VIEW
OPERATING CHARACTERISTICS(1)
Symbol VCC BIASV VIH VIL TA 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
NOTE: 1. All unused control inputs of the device must be held at VCC or GND to ensure proper device operation.
Parameter Supply Voltage
Test Conditions
Min. 2.3 1.3 1.7 2 -- -- -40
Max. 3.6 VCC -- -- 0.7 0.8 +85
Unit V V V V C
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IDT74CBTLV16800 LOW-VOLTAGE 20-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 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 A Port 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 or 3.6V VCC = 3V, BIASV = 2.4V, VO = 0, OE = VCC 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, switch off, BIASV = open, OE = VCC VI = 0 II = 64mA II = 24mA II = 15mA II = 64mA II = 24mA II = 15mA Min. -- -- -- -- | 0.25 | -- -- -- -- -- -- -- -- -- -- Typ. -- -- -- -- -- -- -- 4 6.5 5 5 25 5 5 10 Max. -1.2 1 5 10 -- 10 300 -- -- 9 9 35 7 7 15 Unit V A A A mA A A pF pF
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 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
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. -- 2.2 2.1 2.6 1.5 Max. 0.25 5.5 5.3 7.6 5.1 Unit ns ns ns ns ns
Parameter
Min. -- 2.9 2.8 1.4 1.3
Max. 0.15 7.7 6.4 6.8 4.2
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IDT74CBTLV16800 LOW-VOLTAGE 20-BIT BUS SWITCH WITH PRECHARGED OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
TEST CIRCUITS AND WAVEFORMS TEST CONDITIONS
Symbol VLOAD VIH VT VLZ VHZ CL VCC(1)= 3.3V0.3V 6 3 1.5 300 300 50 VCC(2)= 2.5V0.2V 2 x Vcc Vcc Vcc / 2 150 150 30 Unit V V V mV mV pF
OPPOSITE PHASE INPUT TRANSITION SAME PHAS E INPUT TRANSITION tPLH OUTPUT tPLH tPHL tPHL VIH VT 0V VOH VT VOL VIH VT 0V
Propagation Delay
VCC 500 Pulse Generator
(1, 2)
VLOAD ENABLE Open GND CONTROL INPUT tPZL OUTPUT SW ITCH NORMALLY CLO SED LOW tPZH OUTPUT SW ITCH NORMALLY O PEN HIGH VLOAD/2 VT
DISABLE
VIH VT 0V VLOAD/2 VOL + VLZ VOL VOH VOH
VIN D.U.T.
VOUT
tPLZ
RT
500 CL
tPHZ VT 0V
-V HZ
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.
0V 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
IDT74CBTLV16800 LOW-VOLTAGE 20-BIT BUS SWITCH WITH PRECHARGED OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
CBTLV XXX XX IDT XX Temp. Range Device Type Package
PV PA PF
Shrink Small Outline Package Thin Shrink Small Outline Package Thin Very Small Outline Package
16800 Low-Voltage 20-Bit Bus Switch with Precharged Outputs
74
-40C to +85C
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