IDT74CBTLV3125
LOW-VOLTAGE QUADRUPLE BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
LOW-VOLTAGE QUADRUPLE
BUS SWITCH
IDT74CBTLV3125
FEATURES:
−
−
−
−
−
−
−
−
−
Pin-Out Compatible with Standard ‘125 Logic Products
5Ω A/B bi-directional switch
Isolation Under Power-Off Conditions
Over-voltage tolerant
Latch-up performance exceeds 100mA
V
CC
= 2.3V - 3.6V, normal range
ESD > 2000V per MIL-STD-883, Method 3015;
> 200V using machine model (C = 200pF, R = 0)
Output Enable, Active Low
Available in TSSOP and QSOP packages
DESCRIPTION:
The CBTLV3125 features four independent switches. Each switch is
enabled when the associated output-enable (OE) input is low.
To ensure the high-impedance state during power up or power down,
OE
should be tied to V
CC
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 and Bus Isolation
FUNCTIONAL BLOCK DIAGRAM
1A
2
SW
SIMPLIFIED SCHEMATIC, EACH
SWITCH
1B
3
1OE
1
2A
5
SW
6
2B
A
B
2OE
4
3A
9
SW
8
3B
3OE
10
OE
4A
12
SW
11
4B
4OE
4
NOTE:
1. Pin numbers shown apply to the 14-pin TSSOP package.
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
1
c
2001 Integrated Device Technology, Inc.
MARCH 2001
DSC-5744/2
IDT74CBTLV3125
LOW-VOLTAGE QUADRUPLE BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
1OE
1A
1B
2OE
2A
2B
GND
1
2
3
4
5
6
7
SO14-3
14
13
12
11
10
9
8
V
CC
4OE
4A
4B
3OE
3A
3B
NC
1OE
1A
1B
2OE
2A
2B
GN D
1
2
3
4
SO16-7
5
6
7
8
16
15
14
13
12
11
10
9
V
CC
4OE
4A
4B
3OE
3A
3B
NC
TSSOP
TOP VIEW
QSOP
TOP VIEW
ABSOLUTE MAXIMUM RATINGS
Symbol
V
CC
V
I
I
IK
T
STG
Description
Supply Voltage Range
Input Voltage Range
Continuous Channel Current
Input Clamp Current, , V
I/O
< 0
Storage Temperature
Max.
–0.5 to 4.6
–0.5 to 4.6
128
–50
(1)
Unit
V
V
mA
mA
°C
FUNCTION TABLE
Input OE
L
H
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
(1)
Inputs/Outputs
A Port = B Port
Disconnect
–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.
OPERATING CHARACTERISTICS, T
A
= 25°C
Symbol
V
CC
V
IH
Parameter
Supply Voltage
High-Level Control Input Voltage
V
CC
= 2.3V to 2.7V
V
CC
= 2.7V to 3.6V
V
IL
Low-Level Control Input Voltage
V
CC
= 2.3V to 2.7V
V
CC
= 2.7V to 3.6V
T
A
Operating Free-Air Temperature
Test Conditions
Min.
2.3
1.7
2
—
—
−40
Max.
3.6
—
—
0.7
0.8
85
°C
V
Unit
V
V
NOTE:
1. All unused control inputs of the device must be held at V
CC
or GND to ensure proper operation of the device.
2
IDT74CBTLV3125
LOW-VOLTAGE QUADRUPLE BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Operating Condition: T
A
= – 40°C to +85°C
Symbol
V
IK
I
I
I
OZ
I
OFF
I
CC
∆I
CC
(2)
C
I
C
IO(OFF)
Max at V
CC
= 2.3V
Typ at V
CC
= 2.5V
R
ON
(3)
Parameter
Control Inputs, Data I/O
Control Inputs, Data I/O
Data I/O
Test Conditions
V
CC
= 3V, I
I
=
−18mA
V
CC
= 3.6V, V
I
= V
CC
or GND
V
CC
= 3.6V, V
O
= 0V or 3.6V switch disabled
V
CC
= 0, V
I
or V
O
= 0 to 3.6V
V
CC
= 3.6V, I
O
= 0, V
I
= V
CC
or GND
Min.
—
—
—
—
—
—
—
—
Typ.
(1)
—
—
—
—
—
—
4
6
5
5
27
5
5
10
Max.
– 1.2
±1
5
50
10
300
—
—
8
8
40
7
7
15
Unit
V
µA
µA
µA
µA
µA
pF
pF
Control Inputs
Control Inputs
V
CC
= 3.6V, One input at 3V
,
Other inputs at V
CC
or GND
V
I
= 3V or 0
V
O
= 3V or 0,
OE
= V
CC
V
I
= 0
V
I
= 1.7V
V
I
= 0
I
O
= 64mA
I
O
= 24ma
I
O
= 15mA
I
O
= 64mA
I
O
= 24mA
V
I
= 2.4V
I
O
= 15mA
—
—
—
—
—
—
Ω
V
CC
= 3V
NOTES:
1. Typical values are at V
CC
= 3.3V, +25°C ambient.
2. The increase in supply current is attributable to each input that is at the specified voltage level rather than V
CC
or GND.
3. This is measured by the voltage drop between the A and B terminals at the indicated current through the switch.
SWITCHING CHARACTERISTICS
V
CC
= 2.5V ± 0.2V
Symbol
t
PD
(1)
t
EN
t
DIS
Parameter
Propagation Delay
A to B or B to A
Output Enable Time
OE
to A or B
Output Disable Time
OE
to A or B
Min.
−
1
1
Max.
0.15
4.6
3.9
V
CC
= 3.3V ± 0.3V
Min.
−
1
1
Max.
0.25
4.4
4.2
Unit
ns
ns
ns
NOTE:
1. The propagation time 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
IDT74CBTLV3125
LOW-VOLTAGE QUADRUPLE BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
TEST CIRCUITS AND WAVEFORMS
TEST CONDITIONS
Symbol
V
LOAD
V
IH
V
T
V
LZ
V
HZ
C
L
V
CC
(1)
= 3.3V ± 0.3V
6
3
1.5
300
300
50
V
CC
(2)
= 2.5V ± 0.2V
2 x Vcc
Vcc
V
CC
/2
150
150
30
Unit
V
V
V
mV
mV
pF
OPPOSITE PHASE
INPUT TRANSITION
OUTPUT
t
PLH
t
PHL
PROPAGATION DELAY
SAME PHASE
INPUT TRANSITION
t
PLH
t
PHL
V
IH
V
T
0V
V
OH
V
T
V
OL
V
IH
V
T
0V
TEST CIRCUITS FOR ALL OUTPUTS
V
CC
500
Ω
Pulse
Generator
(1, 2)
ENABLE AND DISABLE TIMES
ENABLE
DISABLE
V
IH
V
T
0V
V
LOAD/2
V
OL +
V
LZ
V
OL
V
OH
V
OH -
V
HZ
0V
V
LOAD
Open
GND
CONTROL
INPUT
t
PZL
OUTPUT
SWITCH
NORMALLY
CLOSED
LOW
t
PZH
OUTPUT
SWITCH
NORMALLY
OPEN
HIGH
V
LOAD/2
V
T
V
IN
D.U.T.
V
OUT
t
PLZ
R
T
500
Ω
C
L
t
PHZ
V
T
0V
DEFINITIONS:
1. C
L
= Load capacitance: includes jig and probe capacitance.
2. R
T
= Termination resistance: should be equal to Z
OUT
of the Pulse
Generator.
NOTES:
1. Pulse Generator for all pulses: Rate
≤
10MHz; t
F
≤
2.5ns; t
R
≤
2.5ns.
2. Pulse Generator for all pulses: Rate
≤
10MHz; t
F
≤
2ns; t
R
≤
2ns.
NOTE:
1. Diagram shown for input control Enable-LOW and input Control
Disable-HIGH.
SWITCH POSITION
Test
t
PLZ
/
t
PZL
t
PHZ/
t
PZH
t
PD
Switch
V
LOAD
GND
Open
4
IDT74CBTLV3125
LOW-VOLTAGE QUADRUPLE BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDT
XX
CBTLV
XXXX
Device Type
X
Package
Tem p. R ange
PG
Q
Thin Shrink Sm all Outline Package (SO14-3)
Quarter Sm all Outline Package (SO16-7)
3125
Low-Voltage Quadruple Bus Switch
74
-40°C to +85°C
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www.idt.com
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logichelp@idt.com
(408) 654-6459
5
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