1
INDUSTRIAL TEMPERATURE RANGE
IDT74CBTLV16292
LOW-VOLTAGE 12-BIT 1:2 MUX / DEMUX BUS SWITCH
AUGUST 2002
2002 Integrated Device Technology, Inc.
DSC-5892/4
c
INDUSTRIAL TEMPERATURE RANGE
APPLICATIONS:
· 3.3V High Speed Bus Switching and Bus Isolation
· Resource sharing
FEATURES:
· 5
A/B bi-directional switch
· Isolation Under Power-Off Conditions
· Make-before-break feature
· Over-voltage tolerant
· Internal 500
pull-down resistor to GND
· 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, TSSOP, and TVSOP packages
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
2
27
1A
12A
SW
SW
SW
S
1
SW
1B1
54
1B2
53
12B1
30
12B2
30
R
PULLDOWN
R
PULLDOWN
R
PULLDOWN
R
PULLDOWN
IDT74CBTLV16292
PRELIMINARY
FUNCTIONAL BLOCK DIAGRAM
A
B
SELECT CONTROL
CIRCUITRY
SIMPLIFIED SCHEMATIC, EACH
SWITCH
LOW-VOLTAGE 12-BIT 1:2
MUX / DEMUX BUS SWITCH
WITH INTERNAL PULL DOWN
RESISTORS
DESCRIPTION:
The CBTLV16292 is a single 12-bit multiplexing / demultiplexing bus
switch, which provides high speed switching. This device has very low ON
resistance, resulting in under 250ps propagation delay throught the switch.
The demultiplexer side has a 500
resistor (R pulldown) termination to
GND to eliminate floating nodes.
When the select (S) input is low, the A port is connected to the B1 port,
and the R pulldown is connected to the B2 port. Similarly, when the S input
is high, A port is connected to B2 port and the R pulldown is connected to
B1 port.
2
INDUSTRIAL TEMPERATURE RANGE
IDT74CBTLV16292
LOW-VOLTAGE 12-BIT 1:2 MUX / DEMUX BUS SWITCH
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 Range
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.
PIN CONFIGURATION
OPERATING CHARACTERISTICS
(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
NOTE:
1. All unused control inputs of the device must be held at V
CC
or GND to ensure proper device operation.
SSOP/ TSSOP/ TVSOP
TOP VIEW
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
NC
NC
1B1
1B2
2B1
2B2
3B1
GND
3B2
4B1
4B2
5B1
5B2
6B1
6B2
7B1
7B2
8B1
GND
8B2
9B1
9B2
10B1
10B2
11B1
11B2
12B1
12B2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
S
1A1
NC
2A1
NC
3A1
NC
GND
4A1
NC
5A1
NC
6A1
NC
7A1
NC
V
CC
8A1
GND
NC
9A1
NC
10A1
NC
11A1
NC
12A1
NC
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
Input
S
Operation
L
A Port = B
1
Port
R
PULLDOWN
= B
2
Port
H
A Port = B
2
Port
R
PULLDOWN
= B
1
Port
FUNCTION TABLE
(1)
Pin Names
Description
S
Select Input
xAx
Port A Inputs or Outputs
xBx
Port B Inputs or Outputs
PIN DESCRIPTION
3
INDUSTRIAL TEMPERATURE RANGE
IDT74CBTLV16292
LOW-VOLTAGE 12-BIT 1:2 MUX / DEMUX BUS SWITCH
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Operating Condition: T
A
= 40°C to +85°C
NOTES:
1. Typical values are at 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.
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
V
CC
= 3.6V, V
I
= V
CC
or GND
--
--
±1
µA
I
OFF
V
CC
= 0V, V
I
or V
O
= 0V or 3.6V
--
--
10
µA
I
CC
V
CC
= 3.6V, I
O
= 0, V
I
= V
CC
or GND
--
--
10
µA
I
CC(2)
Control Inputs
V
CC
= 3.6V, one input at 3V, other inputs at V
CC
or GND
--
--
300
µA
C
I
Control Inputs
V
I
= 3.3V or 0
--
3.5
--
pF
C
IO(OFF)
A port or B port
V
O
= 3.3V or 0
--
22.5
--
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
--
11
40
V
I
= 0
I
O
= 64mA
--
3
7
V
CC
= 3V
I
O
= 24mA
--
3
7
V
I
= 2.4V
I
O
= 15mA
--
7
15
V
CC
= 2.5V ± 0.2V
V
CC
= 3.3V ± 0.3V
Symbol
Parameter
Min.
Max.
Min.
Max.
Unit
t
PD(1)
Propagation Delay
--
0.15
--
0.25
ns
A to B or B to A
t
PD(2)
Propagation Delay
2.5
7.1
2.5
6.7
ns
S to A
t
EN
Output Enable Time
1
5.6
1
5
ns
S to B
t
DIS
Output Disable Time
1
5
1
4.5
ns
S to B
t
MB
/
B(3,4)
Make-Before-Break Time
0
2
0
2
ns
NOTES:
1. The propagation delay 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).
2. The condition to measure this propagation delay is by observing the change of voltage on the A port introduced by static fields equal to 3V or 0V for 3.3V±0.3V or V
CC
or 0 for
2.5V±0.2V on B
1
and B
2
ports to get the required transition.
3. The make-before-break time is the duration between the make and break, during transition from one selected port to another.
4. This parameter is guaranteed by design but not production tested.
SWITCHING CHARACTERISTICS
4
INDUSTRIAL TEMPERATURE RANGE
IDT74CBTLV16292
LOW-VOLTAGE 12-BIT 1:2 MUX / DEMUX BUS 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
Propagation Delay
Test Circuits for All Outputs
Enable and Disable Times
DEFINITIONS:
C
L
= Load capacitance: includes jig and probe capacitance.
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.
Test
Switch
t
PLZ
/t
PZL
V
LOAD
t
PHZ
/t
PZH
GND
t
PD
Open
SWITCH POSITION
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
Vcc
/ 2
V
V
LZ
300
150
mV
V
HZ
300
150
mV
C
L
50
30
pF
TEST CONDITIONS
NOTES:
1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH.
2. Disable Low waveform applies to outputs that are LOW, except when disabled by
the output control S.
5
INDUSTRIAL TEMPERATURE RANGE
IDT74CBTLV16292
LOW-VOLTAGE 12-BIT 1:2 MUX / DEMUX BUS SWITCH
ORDERING INFORMATION
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
IDT
XX
CBTLV
XXX
XX
Package
Device Type
Temp. Range
PV
PA
PF
74
Shrink Small Outline Package
Thin Shrink Small Outline Package
Thin Very Small Outline Package
Low-Voltage 12-Bit Mux / Demux Bus Switch
with Internal Pull Down Resistors
40°C to +85°C
16292
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