74CBTLV3257
LOW-VOLTAGE QUAD 2:1 MUX/DEMUX BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
LOW-VOLTAGE
QUAD 2:1MUX/DEMUX
BUS SWITCH
FEATURES:
74CBTLV3257
DESCRIPTION:
•
•
•
•
•
•
•
Functionally equivalent to QS3257
Ω bi-directional switch connection between two ports
5Ω
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 QSOP and TSSOP packages
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
SIMPLIFIED SCHEMATIC, EACH
SWITCH
FUNCTIONAL BLOCK DIAGRAM
1A
1B1
SW
SW
2A
2B1
SW
SW
3A
A
2B2
B
3B1
SW
SW
4A
1B2
3B2
4B1
SW
SW
FROM ENABLE
CIRCUITRY
4B2
S
OE
INDUSTRIAL TEMPERATURE RANGE
MAY 2019
1
© 2019 Integrated Device Technology, Inc.
DSC-5744/6
74CBTLV3257
LOW-VOLTAGE QUAD 2:1 MUX/DEMUX BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ABSOLUTE MAXIMUM RATINGS(1)
PIN CONFIGURATION
Symbol
S
1
16
VCC
1B1
2
15
OE
1B2
3
14
4B1
1A
4
13
4B2
2B1
5
12
4A
2B2
6
11
3B1
2A
7
10
3B2
GND
8
9
Max
Unit
VCC
SupplyVoltage Range
Description
–0.5 to +4.6
V
VI
Input Voltage Range
–0.5 to +4.6
V
128
mA
–50
mA
–65 to +150
°C
Continuous Channel Current
IIK
Input Clamp Current, VI/O < 0
TSTG
Storage Temperature
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.
3A
TOP VIEW
Package Type
Package Code
Order Code
TSSOP
PGG16
PGG
QSOP
PCG16
QG
FUNCTION TABLE(1)
Inputs
OE
S
Function
L
L
A Port = B1 Port
L
H
A Port = B2 Port
H
X
Disconnect
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
2.3
3.6
V
1.7
—
V
VCC
Supply Voltage
VIH
High-Level Control Input Voltage
VCC = 2.3V to 2.7V
VCC = 2.7V to 3.6V
2
—
VIL
Low-Level Control Input Voltage
VCC = 2.3V to 2.7V
—
0.7
—
0.8
TA
Operating Free-Air Temperature
−40
85
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.
2
V
°C
74CBTLV3257
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 Conditions: TA = –40°C to +85°C
Symbol
VIK
II
IOZ
Parameter
Test Conditions
Min.
Typ.(1)
Max.
Unit
—
—
–1.2
V
Control Inputs, Data Inputs
VCC = 3V, II = –18mA
Control Inputs
VCC = 3.6V, VI = VCC or GND
—
—
±1
µA
Data I/O
VCC = 3.6V, VO = 0 or 3.6V, switch disabled
—
—
20
µA
VCC = 0, VI or VO = 0 to 3.6V
—
—
50
µA
IOFF
VCC = 3.6V, IO = 0, VI = VCC or GND
—
—
10
µA
ΔICC(2)
ICC
Control Inputs
VCC = 3.6V, one input at 3V, other inputs at VCC or GND
—
—
300
µA
CI
Control Inputs
VI = 3V or 0
—
4
—
pF
A Port
B Port
VCC = 2.3V
Typ. at VCC = 2.5V
VO = 3V or 0, OE = VCC = 3.3V
—
—
—
—
—
—
—
—
13
6
5
5
27
5
5
10
—
—
8
8
40
7
7
15
pF
CIO(OFF)
RON(3)
VI = 0
IO = 64mA
IO = 24mA
IO = 15mA
IO = 64mA
IO = 24mA
IO = 15mA
VI = 1.7V
VI = 0
VCC = 3V
VI = 2.4V
Ω
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.
SWITCHING CHARACTERISTICS
VCC = 2.5V ± 0.2V
Symbol
tPD(1)
Parameter
Propagation Delay
VCC = 3.3V ± 0.3V
Min.
Max.
Min.
Max.
Unit
−
0.15
−
0.25
ns
1
6.1
1
5.3
ns
1
6.1
1
5.3
ns
1
4.8
1
4.5
ns
1
5.6
1
5
ns
1
5.5
1
5.5
ns
A to B or B to A
tSEL
Select Time
S to A or B
tEN
Enable Time
S to B
tDIS
Disable Time
S to B
tEN
Output Enable Time
OE to A or B
tDIS
Output Disable Time
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
74CBTLV3257
LOW-VOLTAGE QUAD 2:1 MUX/DEMUX BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
TEST CIRCUITS AND WAVEFORMS
SAME PHASE
INPUT TRANSITION
TEST CONDITIONS
Symbol
VCC(1)= 3.3V±0.3V
VCC(2)= 2.5V±0.2V
Unit
VLOAD
6
2 x Vcc
V
VIH
3
Vcc
V
VT
1.5
Vcc / 2
V
VLZ
300
150
mV
VHZ
300
150
mV
CL
50
30
pF
500Ω
Pulse(1, 2)
Generator
tPHL
VIH
VT
0V
DISABLE
ENABLE
CONTROL
INPUT
GND
tPZL
VOUT
D.U.T.
RT
tPLH
Propagation Delay
Open
VIN
tPHL
OPPOSITE PHASE
INPUT TRANSITION
VLOAD
VCC
tPLH
OUTPUT
OUTPUT
SWITCH
NORMALLY CLOSED
LOW
tPZH
OUTPUT SWITCH
NORMALLY
OPEN
HIGH
500Ω
CL
Test Circuits for All Outputs
tPLZ
VLOAD/2
VT
tPHZ
VT
0V
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.
SWITCH POSITION
Test
Switch
tPLZ/tPZL
VLOAD
tPHZ/tPZH
GND
tSEL
Open
tPD
Open
VIH
VT
0V
VOH
VT
VOL
4
VIH
VT
0V
VLOAD/2
VOL + VLZ
VOL
VOH
VOH -VHZ
0V
74CBTLV3257
LOW-VOLTAGE QUAD 2:1 MUX/DEMUX BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
CBTLV
XXX
XX
XX
Device Type Package
Temp. Range
X
X
Blank
8
Tube
Tape and Reel
G
Green
Q
PG
Quarter-Size Small Outline Package (PCG16)
Thin Shrink Small Outline Package (PGG16)
3257
Low-Voltage Quad 2:1 Mux/Demux Bus Switch
74
–40°C to +85°C
Orderable Part Information
Speed
(ns)
Pkg.
Code
Pkg.
Type
Temp.
Grade
74CBTLV3257PGG
PGG16
TSSOP
I
74CBTLV3257PGG8
PGG16
TSSOP
I
74CBTLV3257QG
PCG16
QSOP
I
74CBTLV3257QG8
PCG16
QSOP
I
Orderable Part ID
Datasheet Document History
12/18/2014
Pg. 5
Updated the ordering information by removing non RoHS part and by adding Tape and Reel information.
05/10/2019
Pg. 2,5
Added table under pin configuration diagram with detailed package information and orderable part information table.
Updated the ordering information diagram in clearer detail.
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5
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