IDT IDT74CBTLV3257 Low-voltage quad 2:1mux/demux bus switch over-voltage tolerant Datasheet

IDT74CBTLV3257
LOW-VOLTAGE QUAD 2:1 MUX/DEMUX BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
LOW-VOLTAGE
QUAD 2:1MUX/DEMUX
BUS SWITCH
IDT74CBTLV3257
FEATURES:
DESCRIPTION:
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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.
Functionally equivalent to QS3257
Ω 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
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
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
OCTOBER 2008
1
© 2006 Integrated Device Technology, Inc.
DSC-5744/4
IDT74CBTLV3257
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
QSOP / TSSOP
TOP VIEW
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
VCC
Supply Voltage
VIH
High-Level Control Input Voltage
VIL
Low-Level Control Input Voltage
TA
Operating Free-Air Temperature
Test Conditions
VCC = 2.3V to 2.7V
Min.
Max.
Unit
2.3
3.6
V
1.7
—
V
VCC = 2.7V to 3.6V
2
—
VCC = 2.3V to 2.7V
—
0.7
—
0.8
−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
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 Conditions: TA = –40°C to +85°C
Min.
Typ.(1)
Max.
Unit
VCC = 3V, II = –18mA
—
—
–1.2
V
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
Symbol
VIK
II
IOZ
Parameter
Control Inputs, Data Inputs
IOFF
ICC
VCC = 3.6V, IO = 0, VI = VCC or GND
—
—
10
µA
VCC = 3.6V, one input at 3V, other inputs at VCC or GND
—
—
300
µA
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
ΔICC(2)
Control Inputs
CI
CIO(OFF)
Test Conditions
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
IDT74CBTLV3257
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
tPLZ
VLOAD/2
VT
tPHZ
VT
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.
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
IDT74CBTLV3257
LOW-VOLTAGE QUAD 2:1 MUX/DEMUX BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
XXX
XX
CBTLV
XX
Device Type Package
Temp. Range
CORPORATE HEADQUARTERS
6024 Silver Creek Valley Road
San Jose, CA 95138
Q
QG
PG
PGG
Quarter-Size Small Outline Package
QSOP - Green
Thin Shrink Small Outline Package
TSSOP - Green
3257
Low-Voltage Quad 2:1 Mux/Demux Bus Switch
74
–40°C to +85°C
for SALES:
800-345-7015 or 408-284-8200
fax: 408-284-2775
www.idt.com
5
for Tech Support:
[email protected]
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