1
IDT74CBTLV3125
LOW-VOLTAGE QUADRUPLE BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
MARCH 2001
2001 Integrated Device Technology, Inc.
DSC-5744/2
c
IDT74CBTLV3125
INDUSTRIAL TEMPERATURE RANGE
FUNCTIONAL BLOCK DIAGRAM
LOW-VOLTAGE QUADRUPLE
BUS SWITCH
SIMPLIFIED SCHEMATIC, EACH
SWITCH
NOTE:
1. Pin numbers shown apply to the 14-pin TSSOP package.
OE
A
B
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.
SW
1B
3
2
1
1A
1O E
2B
6
5
4
2A
2O E
3B
8
9
10
3A
3O E
4B
11
12
4
4A
4O E
SW
SW
SW
FEATURES:
-
Pin-Out Compatible with Standard `125 Logic Products
-
5
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
APPLICATIONS:
-
3.3V High Speed Bus Switching and Bus Isolation
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
2
INDUSTRIAL TEMPERATURE RANGE
IDT74CBTLV3125
LOW-VOLTAGE QUADRUPLE BUS SWITCH
PIN CONFIGURATION
TSSOP
TOP VIEW
V
CC
4A
4B
3OE
3A
3B
1A
1B
2OE
2A
2B
GND
2
3
4
5
6
7
12
11
10
9
8
13
14
1
1OE
4OE
SO14-3
NC
GN D
V
C C
NC
4A
1A
4B
1B
3OE
2OE
3A
2A
3B
2B
1OE
4OE
SO16-7
8
1
3
4
5
6
7
2
9
16
14
13
12
11
10
15
QSOP
TOP VIEW
FUNCTION TABLE
(1)
Input OE
Inputs/Outputs
L
A Port = B Port
H
Disconnect
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
OPERATING CHARACTERISTICS, T
A
= 25
C
Symbol
Parameter
Test Conditions
Min.
Max.
Unit
V
CC
Supply Voltage
2.3
3.6
V
V
IH
High-Level Control Input Voltage
V
CC
= 2.3V to 2.7V
1.7
--
V
V
CC
= 2.7V to 3.6V
2
--
V
IL
Low-Level Control Input Voltage
V
CC
= 2.3V to 2.7V
--
0.7
V
V
CC
= 2.7V to 3.6V
--
0.8
T
A
Operating Free-Air Temperature
-
40
85
C
NOTE:
1. All unused control inputs of the device must be held at V
CC
or GND to ensure proper operation of the device.
ABSOLUTE MAXIMUM RATINGS
(1)
Symbol
Description
Max.
Unit
V
CC
Supply Voltage Range
0.5 to 4.6
V
V
I
Input Voltage Range
0.5 to 4.6
V
Continuous Channel Current
128
mA
I
IK
Input Clamp Current, , V
I/O
< 0
50
mA
T
STG
Storage Temperature
65 to +150
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.
3
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
= 40C to +85C
Symbol
Parameter
Test Conditions
Min.
Typ.
(1)
Max.
Unit
V
IK
Control Inputs, Data I/O
V
CC
= 3V, I
I
=
-
18mA
--
--
1.2
V
I
I
Control Inputs, Data I/O
V
CC
= 3.6V, V
I
= V
CC
or GND
--
--
1
A
I
OZ
Data I/O
V
CC
= 3.6V, V
O
= 0V or 3.6V switch disabled
--
--
5
A
I
OFF
V
CC
= 0, V
I
or V
O
= 0 to 3.6V
--
--
50
A
I
CC
V
CC
= 3.6V, I
O
= 0, V
I
= V
CC
or GND
--
--
10
A
I
CC
(2)
Control Inputs
V
CC
= 3.6V, One input at 3V
,
Other inputs at V
CC
or GND
--
--
300
A
C
I
Control Inputs
V
I
= 3V or 0
--
4
--
pF
C
IO(OFF)
V
O
= 3V or 0,
OE = V
CC
--
6
--
pF
Max at V
CC
= 2.3V
V
I
= 0
I
O
= 64mA
--
5
8
Typ at V
CC
= 2.5V
I
O
= 24ma
--
5
8
R
ON
(3)
V
I
= 1.7V
I
O
= 15mA
--
27
40
V
I
= 0
I
O
= 64mA
--
5
7
V
CC
= 3V
I
O
= 24mA
--
5
7
V
I
= 2.4V
I
O
= 15mA
--
10
15
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
V
CC
= 3.3V 0.3V
Symbol
Parameter
Min.
Max.
Min.
Max.
Unit
t
PD
(1)
Propagation Delay
A to B or B to A
-
0.15
-
0.25
ns
t
EN
Output Enable Time
OE to A or B
1
4.6
1
4.4
ns
t
DIS
Output Disable Time
OE to A or B
1
3.9
1
4.2
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).
4
INDUSTRIAL TEMPERATURE RANGE
IDT74CBTLV3125
LOW-VOLTAGE QUADRUPLE BUS SWITCH
TEST CIRCUITS AND WAVEFORMS
PROPAGATION DELAY
Open
V
LOAD
GND
V
CC
Pulse
Generator
D.U.T.
500
500
C
L
R
T
V
IN
V
OUT
(1, 2)
SAME PHASE
INPUT TRANSITION
OPPOSITE PHASE
INPUT TRANSITION
0V
0V
V
OH
V
OL
t
PLH
t
PHL
t
PHL
t
PLH
OUTPUT
V
IH
V
T
V
T
V
IH
V
T
CONTROL
INPUT
t
PLZ
0V
OUTPUT
NORMALLY
LOW
t
PZH
0V
SWITCH
CLOSED
OUTPUT
NORMALLY
HIGH
ENABLE
DISABLE
SWITCH
OPEN
t
PHZ
0V
V
OL +
V
LZ
V
OH
V
T
V
T
t
PZL
V
LOAD/2
V
LOAD/2
V
IH
V
T
V
OL
V
OH -
V
HZ
TEST CIRCUITS FOR ALL OUTPUTS
ENABLE AND DISABLE TIMES
TEST CONDITIONS
Symbol
V
CC
(1)
= 3.3V 0.3V
V
CC
(2)
= 2.5V 0.2V
Unit
V
LOAD
6
2 x Vcc
V
V
IH
3
Vcc
V
V
T
1.5
V
CC
/2
V
V
LZ
300
150
mV
V
HZ
300
150
mV
C
L
50
30
pF
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
Switch
t
PLZ
/
t
PZL
V
LOAD
t
PHZ/
t
PZH
GND
t
PD
Open
5
IDT74CBTLV3125
LOW-VOLTAGE QUADRUPLE BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDT
XX
C BTLV
XXXX
D evice Type
X
Package
Tem p. R ange
PG
Q
3125
74
Thin Shrink Sm all Outline Package (SO14-3)
Quarter Sm all Outline Package (SO16-7)
Low -Voltage Quadruple Bus S w itch
-40C to +85C
CORPORATE HEADQUARTERS
for SALES:
for Tech Support:
2975 Stender Way
800-345-7015 or 408-727-6116
logichelp@idt.com
Santa Clara, CA 95054
fax: 408-492-8674
(408) 654-6459
www.idt.com
PDF 
ZIP