INDUSTRIAL TEMPERATURE RANGE
IDT74CBTLV3383
LOW-VOLTAGE 10-BIT BUS-EXCHANGE SWITCH
1
AUGUST 2002
INDUSTRIAL TEMPERATURE RANGE
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
2002 Integrated Device Technology, Inc.
DSC-5738/4
IDT74CBTLV3383
PRELIMINARY
FUNCTIONAL BLOCK DIAGRAM
LOW-VOLTAGE 10-BIT
BUS-EXCHANGE SWITCH
FEATURES:
5
A/B bi-directional bus 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)
Available in SSOP, QSOP and TSSOP packages
DESCRIPTION:
The CBTLV3383 provides ten bits of high-speed bus switching or exchang-
ing with low on-switch resistance of the switch allowing connections to be made
with minimal propagation delay.
The device operates as a 10-bit bus switch or a 5-bit bus exchanger, which
provides swapping of the A and B pairs of signals. The bus-exchange function
is selected when BX is high and BE is low.
APPLICATIONS:
3.3V High Speed Bus Switching and Bus Isolation
Crossbar Switching
3
4
1A1
1A2
2
5
1B1
1B2
SW
SW
22
5A 1
5A2
20
23
5B 1
5B2
1
13
BX
21
BE
SW
SW
SW
SW
SW
SW
A
B
CONTROL CIRCUITRY
SIMPLIFIED SCHEMATIC, EACH SWITCH
INDUSTRIAL TEMPERATURE RANGE
2
IDT74CBTLV3383
LOW-VOLTAGE 10-BIT BUS-EXCHANGE SWITCH
3
A
2
3
A
1
BX
GN D
V
CC
BE
5
A
2
1
A
1
5
A
1
1
A
2
5
B
1
1
B
2
4
B
2
2
B
1
4
A
2
2
A
1
4
A
1
2
A
2
4
B
1
2
B
2
3
B
2
3
B
1
1
B
1
5
B
2
11
14
12
13
1
24
3
22
4
21
5
20
6
19
7
18
8
17
9
16
10
15
2
23
PIN CONFIGURATION
SSOP/ QSOP/ TSSOP
TOP VIEW
Symbol
Description
Max
Unit
V
CC
SupplyVoltage 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
ABSOLUTE MAXIMUM RATINGS
(1)
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.
NOTE:
1. H = HIGH Voltage Level
X = Don't Care
L = LOW Voltage Level
Z = High Impedance
Input
Inputs/Outputs
BE
BX
1
A
1
-
5
A
1
1
A
2
-
5
A
2
L
L
1
B
1
-
5
B
1
1
B
2
-
5
B
2
L
H
1
B
2
-
5
B
2
1
B
1
-
5
B
1
H
X
Z
Z
FUNCTION TABLE
(1)
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
OPERATING CHARACTERISTICS, T
A
= 25C
(1)
NOTE:
1. All unused control inputs of the device must be held at V
CC
or GND to ensure proper device operation.
INDUSTRIAL TEMPERATURE RANGE
IDT74CBTLV3383
LOW-VOLTAGE 10-BIT BUS-EXCHANGE SWITCH
3
Symbol
Parameter
Test Conditions
Min.
Typ.
(1)
Max.
Unit
V
IK
Control Inputs, Data Inputs
V
CC
= 3V, I
I
= 18mA
--
--
1.2
V
I
I
Control Inputs
V
CC
= 3.6V, V
I
= V
CC
or GND
--
--
1
A
I
OZ
Data I/O
V
CC
= 3.6V, V
O
= 0 or 3.6V, switch disabled
--
--
5
A
I
OFF
V
CC
= 0, V
I
or V
O
= 0 to 3.6V
--
--
10
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
--
3.5
--
pF
C
IO(OFF)
V
O
= 3V or 0, BE = V
CC
--
13.5
--
pF
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
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Operating Conditions: T
A
= 40C to +85C
NOTES:
1. Typical values are at V
CC
= 3.3V, +25C ambient.
2. The increase in supply current is attributable to each current 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. On-state resistance is determined by the lower of the voltages
of the two (A or B ) terminals.
V
CC
= 2.5V 0.2V
V
CC
= 3.3V 0.3V
Symbol
Parameter
Min.
Typ.
Max.
Min.
Typ.
Max.
Unit
t
PD
(1)
Propagation Delay
-
-
0.15
-
-
0.25
ns
A to B or B to A
t
PD
Propagation Delay
1.5
-
5.8
1.5
-
4.7
ns
BX to A or B
t
EN
Output Enable Time
1.5
-
5.3
1.5
-
4.7
ns
BE to A or B
t
DIS
Output Disable Time
1
-
6
1
-
6
ns
BE 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).
SWITCHING CHARACTERISTICS
INDUSTRIAL TEMPERATURE RANGE
4
IDT74CBTLV3383
LOW-VOLTAGE 10-BIT BUS-EXCHANGE SWITCH
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 AND WAVEFORMS
Test Circuits for All Outputs
Enable and Disable Times
Propagation Delay
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
2.5ns.
DEFINITIONS:
C
L
= Load capacitance: includes jig and probe capacitance.
R
T
= Termination resistance: should be equal to Z
OUT
of the Pulse Generator.
Symbol
V
CC(1)
= 3.3V0.3V
V
CC(2)
= 2.5V0.2V
Unit
V
LOAD
6
2 x Vcc
V
V
IH
3
Vcc
V
V
T
1.5
Vcc
/ 2
V
V
LZ
300
150
mV
V
HZ
300
150
mV
C
L
50
30
pF
TEST CONDITIONS
Test
Switch
t
PLZ
/t
PZL
V
LOAD
t
PHZ
/t
PZH
GND
t
PD
Open
SWITCH POSITION
INDUSTRIAL TEMPERATURE RANGE
IDT74CBTLV3383
LOW-VOLTAGE 10-BIT BUS-EXCHANGE SWITCH
5
ORDERING INFORMATION
ID T
XX
C BTLV
XXX
XX
Package
D evice Type
Tem p. R ange
PY
Q
PG
74
Shrink S m all Outline P ackage
Quarter-size Sm all O utline Package
Thin Shrink Sm all O utline Package
Low-Voltage 10-Bit Bus Exchange Switch
40C to +85C
3383
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
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