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IDT74CBTLV3251 LOW-VOLTAGE 8:1 MULTIPLEXER/DEMULTIPLEXER
INDUSTRIAL TEMPERATURE RANGE
LOW-VOLTAGE 8:1 MULTIPLEXER/ DEMULTIPLEXER
FEATURES:
- - - - - - - - Functionally equivalent to QS3251 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
IDT74CBTLV3251
DESCRIPTION:
The CBTLV3251 is a 1-of-8 high-speed multiplexer/demultiplexer. The low on-state resistance of the switch allows connections to be made with minimal propagation delay. The select input (S0, S1, S2) controls the data flow. The multiplexer/ demultiplexer switches are disabled when the output-enable (OE) input is high. To ensure that the device is in 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
A 5 SW 4 B1
SW
3
B2
SW SW
2
B3
1
B4
SW
15
B5
SW
14
B6
SW
13
B7
SW
12
B8
S0
11
S1
10
S2 OE
9
7
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
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c 2001 Integrated Device Technology, Inc.
APRIL 2001
DSC-5403/-
IDT74CBTLV3251 LOW-VOLTAGE 8:1 MULTIPLEXER/DEMULTIPLEXER
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
B4 B3 B2 B1 A NC OE GND 1 2 3 4 5 6 7 8 16 15 14 SO16-7 13 SO16-9 12 SO16-10 11 10 9 VCC B5 B6 B7 B8 S0 S1 S2
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 Max. -0.5 to 4.6 -0.5 to 4.6 128 -50 -65 to +150 Unit V V mA mA 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.
QSOP/ SSOP/ TSSOP TOP VIEW
FUNCTION TABLE (1)
Inputs OE L L L L L L L S2 L L L L H H H H X S1 L L H H L L H H X S0 L H L H L H L H X Function A Port = B1 Port A Port = B2 Port A Port = B3 Port A Port = B4 Port A Port = B5 Port A Port = B6 Port A Port = B7 Port A Port = B8 Port Disconnect
SIMPLIFIED SCHEMATIC, EACH SWITCH
A
B
L H
NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level X = Don't Care
CO NTRO L CIR CUITRY
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 operation.
Test Conditions
Min. 2.3 1.7 2 -- -- -40
Max. 3.6 -- -- 0.7 0.8 +85
Unit V V V C
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IDT74CBTLV3251 LOW-VOLTAGE 8:1 MULTIPLEXER/DEMULTIPLEXER
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 40.5 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 output 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 4.8 4.8 5.1 5 5.5 VCC = 3.3V 0.3V Min. - 1 1 1 1 1 Max. 0.25 4.5 4.5 5.3 4.8 6 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).
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IDT74CBTLV3251 LOW-VOLTAGE 8:1 MULTIPLEXER/DEMULTIPLEXER
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 OUTPUT tPLH tPHL
PROPAGATION DELAY/ SELECT TIME
SAME PHASE INPUT TRANSITION 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 0V
VLOAD Open GND CONTROL INPUT tPZL OUTPUT SW ITCH NORMALLY CLOSE D LOW tPZH OUTPUT SW ITCH NORMALLY OPEN HIGH NOTE: 1. VLOAD/2 VT
VIN D.U.T.
VOUT
tPLZ
RT
500 CL
tPHZ VT 0V
-V HZ
DEFINITIONS: CL = Load capacitance: includes jig and load capacitance. RT = Termination resistance: should be equal to ZOUT of the pulse generator. NOTES: 1. 2. Pulse Generator for all pulses: Rate 10MHz; tF 2.5ns, tR 2.5ns Pulse Generator for all pulses: Rate 10MHz; tF 2ns, tR 2ns
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
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IDT74CBTLV3251 LOW-VOLTAGE 8:1 MULTIPLEXER/DEMULTIPLEXER
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDT XX CBTLV XXX XX Package Temp. Range Device Type
Q PY PG
Quarter-Size Small Outline Package (SO16-7) Shrink Small Outline Package (SO16-9) Thin Shrink Small Outline Package (SO16-10)
3251
Low-Voltage 1-of-8 M ultiplexer/Demultiplexer
74
-40C to +85C
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for Tech Support: logichelp@idt.com (408) 654-6459
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