View IDT74CBTLV3257_279392.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

IDT74CBTLV3257 LOW-VOLTAGE QUAD 2:1 MUX/DEMUX BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
LOW-VOLTAGE QUAD 2:1MUX/DEMUX BUS SWITCH
FEATURES:
- - - - - - - - Functionally equivalent to QS3257 5 Switch Connection between Two Ports 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
IDT74CBTLV3257
DESCRIPTION:
The CBTLV3257 is a quad 2:1 multiplexer/demultiplexer. The low onstate resistance of the switch allows connections to be made with minimal propagation delay. The select (S) input controls the data flow. The multiplexers/demultiplexers are enabled when the output-enable (OE) input is low. 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, Multiplexing, and Bus Isolation
FUNCTIONAL BLOCK DIAGRAM
SIMPLIFIED SCHEMATIC, EACH SWITCH
1B1
1A
SW
SW
1B2
2A
SW
2B1
SW
2B2
A
B
3A
SW
3B1
SW
3B2
4A
SW
4B1
SW
4B2
FROM ENABLE CIRCUITRY
S
OE
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
1
c 2001 Integrated Device Technology, Inc.
SEPTEMBER 2001
DSC-5744/1
IDT74CBTLV3257 LOW-VOLTAGE QUAD 2:1 MUX/DEMUX BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS (1)
Symbol VCC Description Supply Voltage Range Input Voltage Range Continuous Channel Current IIK Input Clamp Current, VI/O < 0 Storage Temperature TSTG Max. -0.5 to 4.6 -0.5 to 4.6 128 -50 -65 to +150 Unit V V mA mA C
S 1B1 1B2 1A 2B1 2B2 2A GND
1 2 3 4 5 6 7 8
16 15 14 SO16-7 13 SO16-9 SO16-10 12 11 10 9
VCC OE 4B1 4B2 4A 3B1 3B2 3A
VI
NOTES: 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.
QSOP/ SSOP/ TSSOP TOP VIEW
FUNCTION TABLE (1)
Inputs OE L L H S L H X Function A Port = B1 Port A Port = B2 Port Disconnect
NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level X = Don't Care
OPERATING CHARACTERISTICS, TA = 25C
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 operation.
Test Conditions
Min. 2.3 1.7 2 -- -- -40
Max. 3.6 -- -- 0.7 0.8 +85
Unit V V V C
2
IDT74CBTLV3257 LOW-VOLTAGE QUAD 2:1 MUX/DEMUX 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) Control Inputs Control Inputs A port B port Max at VCC = 2.3V Typ at VCC = 2.5V
RON (3)
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 = 0 or 3.6V, switch disabled VCC = 0, VI or VO = 0 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 = 3.3V VI = 0 VI = 1.7V VI = 0 IO = 64mA IO = 24ma IO = 15mA IO = 64mA IO = 24mA VI = 2.4V IO = 15mA
Min. -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Typ. (1) -- -- -- -- -- -- 4 13 6 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 A A pF pF
VCC = 3V
NOTES: 1. Typical values are at VCC = 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) tSEL tEN tDIS tEN tDIS Parameter Propagation Delay A to B or B to A Select Time S to A or B Enable Time S to B Disable Time S to B Enable Time OE to A or B Disable Time OE to A or B Min. - 1 1 1 1 1 Max. 0.15 6.1 6.1 4.8 5.6 5.5 VCC = 3.3V 0.3V Min. - 1 1 1 1 1 Max. 0.25 5.3 5.3 4.5 5 5.5 Unit ns 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 impedance).
3
IDT74CBTLV3257 LOW-VOLTAGE QUAD 2:1 MUX/DEMUX BUS SWITCH
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
OPPO SITE PHASE INPUT TRANSITIO N OUTPUT tPLH tPHL
PROPAGATION DELAY/ SELECT TIME
SAME PHASE INPUT TRANSITIO N tPLH 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 VIH VT 0V VLOAD/2 VOL + VLZ VOL VOH VOH -V HZ 0V
VLOAD Open GND CONTROL INPUT tPZL OUTPUT SW ITCH NORMALLY CLOSED LOW tPZH OUTPUT SW ITCH NORMALLY OPEN HIGH VLOAD/2 VT
VIN D.U.T.
VOUT
tPLZ
RT
500 CL
tPHZ VT 0V
DEFINITIONS: CL = Load capacitance: includes jig and load 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 tSEL Switch VLOAD GND Open Open
4
IDT74CBTLV3257 LOW-VOLTAGE QUAD 2:1 MUX/DEMUX BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDT XX CBTLV XXX Device Type XX Package
Temp. Range
Q PY PG
Quarter-Size Small Outline Package (SO16-7) Shrink Small Outline Package (SO16-9) Thin Shrink Small Outline Package (SO16-10)
3257
Low-Voltage Quad 2:1 Mux/Demux Bus Switch
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
5

▲Up To Search▲

Price & Availability of IDT74CBTLV3257

	To Download IDT74CBTLV3257 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .