74CBTLV3257Q [IDT]
Bus Exchanger, CBTLV/3B Series, 1-Func, 4-Bit, True Output, CMOS, PDSO16, QSOP-16;
| 型号： | 74CBTLV3257Q |
| 厂家： | 
INTEGRATED DEVICE TECHNOLOGY |
| 描述： | Bus Exchanger, CBTLV/3B Series, 1-Func, 4-Bit, True Output, CMOS, PDSO16, QSOP-16 光电二极管 |
| 文件： | 总5页 (文件大小：384K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
IDT74CBTLV3257
LOW-VOLTAGE
QUAD 2:1MUX/DEMUX
BUS SWITCH
FEATURES:
DESCRIPTION:
• Functionally equivalent to QS3257
• 5Ω switch connection between two ports
• Isolation under power-off conditions
• Over-voltage tolerant
The CBTLV3257 is a quad 2:1 multiplexer/demultiplexer. The low on-
stateresistanceoftheswitchallows connections tobemadewithminimal
propagationdelay.
Theselect(S)inputcontrolsthedataflow.Themultiplexers/demultiplexers
are enabled when the output-enable (OE) input is low.
To ensure the high-impedance state during power up or power down,
OE shouldbe tiedtoVCC througha pullupresistor;the minimumvalue of
the resistoris determinedbythe current-sinkingcapabilityofthe driver.
• 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 QSOP and TSSOP packages
APPLICATIONS:
• 3.3V High Speed Bus Switching, Multiplexing, and Bus Isolation
FUNCTIONALBLOCKDIAGRAM
SIMPLIFIEDSCHEMATIC,EACH
SWITCH
1A
2A
SW
1B1
1B2
SW
2B1
2B2
SW
A
B
SW
SW
SW
3A
4A
SW
3B1
3B2
4B1
4B2
SW
FROM ENABLE
CIRCUITRY
S
OE
TheIDTlogoisaregisteredtrademarkofIntegratedDeviceTechnology,Inc.
INDUSTRIAL TEMPERATURE RANGE
OCTOBER 2008
1
© 2006 Integrated Device Technology, Inc.
DSC-5744/4
IDT74CBTLV3257
LOW-VOLTAGEQUAD2:1MUX/DEMUXBUSSWITCH
INDUSTRIALTEMPERATURERANGE
ABSOLUTEMAXIMUMRATINGS(1)
PINCONFIGURATION
Symbol
VCC
Description
Max
–0.5 to +4.6
–0.5 to +4.6
128
Unit
V
SupplyVoltage Range
S
1B1
1B2
1A
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VCC
OE
VI
Input Voltage Range
V
Continuous Channel Current
Input Clamp Current, VI/O < 0
Storage Temperature
mA
mA
° C
IIK
–50
4B1
4B2
4A
TSTG
–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.
2B1
2B2
2A
3B1
3B2
3A
GND
QSOP / TSSOP
TOP VIEW
FUNCTIONTABLE(1)
Inputs
OE
L
S
Function
A Port = B1 Port
A Port = B2 Port
Disconnect
L
H
X
L
H
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
OPERATING CHARACTERISTICS, TA = 25°C(1)
Symbol Parameter
Test Conditions
Min.
Max.
Unit
V
VCC
VIH
SupplyVoltage
2.3
1.7
2
3.6
—
—
0.7
0.8
85
High-LevelControlInputVoltage
Low-LevelControlInputVoltage
OperatingFree-AirTemperature
VCC = 2.3V to 2.7V
VCC = 2.7V to 3.6V
VCC = 2.3V to 2.7V
VCC = 2.7V to 3.6V
V
VIL
TA
—
—
−40
V
°C
NOTE:
1. All unused control inputs of the device must be held at VCC or GND to ensure proper device operation.
2
IDT74CBTLV3257
LOW-VOLTAGEQUAD2:1MUX/DEMUXBUSSWITCH
INDUSTRIALTEMPERATURERANGE
DCELECTRICALCHARACTERISTICSOVEROPERATINGRANGE
FollowingConditionsApplyUnlessOtherwiseSpecified:
OperatingConditions:TA =–40°Cto+85°C
Symbol
VIK
Parameter
Control Inputs, Data Inputs
Control Inputs
Test Conditions
VCC = 3V, II = –18mA
Min.
—
—
—
—
—
—
—
Typ.(1)
—
Max.
–1.2
1
Unit
V
II
VCC = 3.6V, VI = VCC or GND
—
µA
µ A
µ A
µ A
µ A
pF
IOZ
Data I/O
VCC = 3.6V, VO = 0 or 3.6V, switch disabled
VCC = 0, VI or VO = 0 to 3.6V
—
20
IOFF
ICC
—
50
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
—
10
(2)
ΔICC
Control Inputs
Control Inputs
—
300
—
CI
4
CIO(OFF)
A Port
B Port
VO = 3V or 0, OE = VCC = 3.3V
—
—
13
6
—
—
pF
VCC = 2.3V
VI = 0
IO = 64mA
IO = 24mA
IO = 15mA
IO = 64mA
IO = 24mA
IO = 15mA
—
—
—
—
—
—
5
5
8
8
Typ. at VCC = 2.5V
(3)
RON
VI = 1.7V
VI = 0
27
5
40
7
Ω
VCC = 3V
5
7
VI = 2.4V
10
15
NOTES:
1. Typical values are at VCC = 3.3V, +25°C ambient.
2. The increase in supply current is attributable to each current 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.
SWITCHINGCHARACTERISTICS
VCC = 2.5V ± 0.2V
Min.
VCC = 3.3V ± 0.3V
Max.
Symbol Parameter
Max.
Min.
Unit
(1)
tPD
PropagationDelay
−
0.15
−
0.25
ns
A to B or B to A
SelectTime
S to A or B
EnableTime
S to B
tSEL
1
1
1
6.1
6.1
4.8
1
1
1
5.3
5.3
4.5
ns
ns
ns
tEN
tDIS
DisableTime
S to B
tEN
OutputEnableTime
1
1
5.6
5.5
1
1
5
ns
ns
OE to A or B
tDIS
OutputDisableTime
5.5
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 driven by an ideal voltage source
(zero output impedance).
3
IDT74CBTLV3257
LOW-VOLTAGEQUAD2:1MUX/DEMUXBUSSWITCH
INDUSTRIALTEMPERATURERANGE
TESTCIRCUITSANDWAVEFORMS
TESTCONDITIONS
VIH
VT
0V
SAME PHASE
INPUT TRANSITION
tPHL
tPHL
tPLH
tPLH
VOH
VT
VOL
(1)
(2)
OUTPUT
Symbol
VLOAD
VIH
VCC =3.3V±0.3V
VCC =2.5V±0.2V
Unit
V
6
3
2 x Vcc
Vcc
V
VIH
VT
0V
OPPOSITE PHASE
INPUT TRANSITION
VT
1.5
300
300
50
Vcc / 2
150
V
VLZ
mV
mV
pF
VHZ
150
Propagation Delay
CL
30
VLOAD
Open
GND
VCC
DISABLE
ENABLE
VIH
VT
CONTROL
INPUT
500Ω
0V
tPZL
tPLZ
VIN
VOUT
(1, 2)
Pulse
VLOAD/2
D.U.T.
VLOAD/2
OUTPUT
NORMALLY
LOW
Generator
SWITCH
CLOSED
VT
VOL + VLZ
VOL
500Ω
tPHZ
RT
tPZH
CL
VOH
VOH -VHZ
OUTPUT
NORMALLY
HIGH
SWITCH
OPEN
VT
0V
0V
Test Circuits for All Outputs
Enable and Disable Times
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 ≤ 2.5ns.
SWITCHPOSITION
Test
tPLZ/tPZL
tPHZ/tPZH
tSEL
Switch
VLOAD
GND
Open
tPD
Open
4
IDT74CBTLV3257
LOW-VOLTAGEQUAD2:1MUX/DEMUXBUSSWITCH
INDUSTRIALTEMPERATURERANGE
ORDERINGINFORMATION
CBTLV
XXX
XX
XX
Temp. Range
Device Type Package
Quarter-Size Small Outline Package
Q
QG
PG
PGG
QSOP - Green
Thin Shrink Small Outline Package
TSSOP - Green
3257
74
Low-Voltage Quad 2:1 Mux/Demux Bus Switch
–40°C to +85°C
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