Both A and B ports have 25Ω series dampening resistors
Ω
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
IDT74CBTLVR16292
DESCRIPTION:
The CBTLVR16292 is a single 12-bit multiplexing / demultiplexing bus
switch, which provides high speed switching. Both A and B ports have 25Ω
series dampening resistors to minimize undershoot, reflection noise, and
charge sharing effects. The demultiplexer side has a 500Ω resistor
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.
APPLICATIONS:
• 3.3V High Speed Bus Switching and Bus Isolation
• Resource sharing
FUNCTIONAL BLOCK DIAGRAM
1A
2
54
SW
SIMPLIFIED SCHEMATIC, EACH
SWITCH
1B1
R
PULLDOWN
R
PULLDOWN
A
SW
53
B
1B2
12A
27
SW
30
12B1
R
PULLDOWN
SELECT CONTROL
CIRCUITRY
R
PULLDOWN
SW
30
12B2
S
1
INDUSTRIAL TEMPERATURE RANGE
1
c
2002 Integrated Device Technology, Inc.
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
AUGUST 2002
DSC-5891/5
IDT74CBTLVR16292
LOW-VOLTAGE 12-BIT 1:2 MUX / DEMUX BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
S
1A
NC
2A
NC
3A
NC
GND
4A
NC
5A
NC
6A
NC
7A
NC
V
CC
8A
GND
NC
9A
NC
10A
NC
11A
NC
12A
NC
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
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
ABSOLUTE MAXIMUM RATINGS
(1)
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 Range
Max.
–0.5 to 4.6
–0.5 to 4.6
128
–50
–65 to +150
Unit
V
V
mA
mA
°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 DESCRIPTION
Pin Names
S
xAx
xBx
Select Input
Port A Inputs or Outputs
Port B Inputs or Outputs
Description
FUNCTION TABLE
(1)
Input
S
L
H
Operation
A Port = B
1
Port
R
PULLDOWN
= B
2
Port
A Port = B
2
Port
R
PULLDOWN
= B
1
Port
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
SSOP/ TSSOP/ TVSOP
TOP VIEW
OPERATING CHARACTERISTICS
(1)
Symbol
V
CC
V
IH
V
IL
T
A
Parameter
Supply Voltage
High-Level Control Input Voltage
Low-Level Control Input Voltage
Operating Free-Air Temperature
V
CC
= 2.3V to 2.7V
V
CC
= 2.7V to 3.6V
V
CC
= 2.3V to 2.7V
V
CC
= 2.7V to 3.6V
NOTE:
1. All unused control inputs of the device must be held at V
CC
or GND to ensure proper device operation.
Test Conditions
Min.
2.3
1.7
2
—
—
–40
Max.
3.6
—
—
0.7
0.8
+85
Unit
V
V
V
°C
2
IDT74CBTLVR16292
LOW-VOLTAGE 12-BIT 1:2 MUX / DEMUX 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
OFF
I
CC
ΔI
CC(2)
C
I
C
IO(OFF)
Control Inputs
Control Inputs
A port or B port
Max. at V
CC
= 2.3V
Typ. at V
CC
= 2.5V
R
ON(3)
V
CC
= 3V
V
I
= 2.4V
V
I
= 1.7V
V
I
= 0
Parameter
Control Inputs, Data I/O
Control Inputs
Test Conditions
V
CC
= 3V, I
I
= –18mA
V
CC
= 3.6V, V
I
= V
CC
or GND
V
CC
= 0V, V
I
or V
O
= 0V or 3.6V
V
CC
= 3.6V, I
O
= 0, V
I
= V
CC
or GND
V
CC
= 3.6V, one input at 3V, other inputs at V
CC
or GND
V
I
= 3.3V or 0
V
O
= 3.3V or 0
V
I
= 0
I
O
= 64mA
I
O
= 24mA
I
O
= 15mA
I
O
= 64mA
I
O
= 24mA
I
O
= 15mA
Min.
—
—
—
—
—
—
—
—
—
—
—
—
—
Typ.
(1)
—
—
—
—
—
3.5
23
30
30
36
30
30
32
Max.
–1.2
±1
10
10
300
—
—
47
47
80
42
42
47
Ω
Unit
V
µA
µA
µA
µA
pF
pF
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.
SWITCHING CHARACTERISTICS
V
CC
= 2.5V ± 0.2V
Symbol
t
PD(1)
t
PD(2)
t
EN
t
DIS
t
MB
/
B(3,4)
Propagation Delay
A to B or B to A
Propagation Delay
S to A
Output Enable Time
S to B
Output Disable Time
S to B
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.
V
CC
= 3.3V ± 0.3V
Min.
—
3.2
1
1
Max.
1.5
8
5.8
4.6
Unit
ns
ns
ns
ns
Parameter
Min.
—
3.2
1
1
Max.
0.9
8.5
6.5
5.3
3
IDT74CBTLVR16292
LOW-VOLTAGE 12-BIT 1:2 MUX / DEMUX 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
Vcc / 2
150
150
30
Unit
V
V
V
mV
mV
pF
SAME PHASE
INPUT TRANSITION
t
PLH
OUTPUT
t
PLH
OPPOSITE PHASE
INPUT TRANSITION
t
PHL
t
PHL
V
IH
V
T
0V
V
OH
V
T
V
OL
V
IH
V
T
0V
Propagation Delay
V
CC
500Ω
Pulse
Generator
(1, 2)
V
LOAD
Open
GND
CONTROL
INPUT
ENABLE
DISABLE
V
IN
D.U.T.
R
T
V
OUT
t
PZL
OUTPUT
SWITCH
NORMALLY
CLOSED
LOW
t
PZH
OUTPUT
SWITCH
NORMALLY
OPEN
HIGH
V
LOAD/2
V
T
t
PHZ
V
T
0V
t
PLZ
V
IH
V
T
0V
V
LOAD/2
V
OL +
V
LZ
V
OL
V
OH
V
OH -
V
HZ
0V
500Ω
C
L
Test Circuits for All Outputs
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.
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
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