ESD >2000V per MIL-STD-883, Method 3015; >200V using
machine model (C = 200pF, R = 0)
• Available in SSOP, TSSOP, and TVSOP packages
DESCRIPTION:
The CBTLV16212 provides a set of 24 high-speed switches for bus
exchanging and switching. The device has low ON resistance, resulting
in under 250ps propagation delay through the switch. The CBTLV16212
operates as a single 24-bit bus switch or as a 12-bit bus exchanger, which
provides data exchanging between the four signal ports through the data
select (S
0
-S
2
) pins.
The CBTLV16212 has the break-before-make feature, which allows
zero current when switching between ports B1 and B2.
APPLICATIONS:
• 3.3V High Speed Bus Switching and Bus Isolation
FUNCTIONAL BLOCK DIAGRAM
SIMPLIFIED SCHEMATIC, EACH
SWITCH
54
1
B
1
1
A
1
2
SW
SW
SW
1
A
2
3
SW
53
1
B
2
A
B
12
A
1
27
SW
30
12
B
1
SW
SW
12
A
2
28
SW
29
12
B
2
FLOW CONTROL
CIRCUITRY
S
0
1
S
1
56
S
2
55
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-5889/5
IDT74CBTLV16212
LOW-VOLTAGE 24-BIT BUS EXCHANGE SWITCH
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
S0
1A1
1A2
2A1
2A2
3A1
3A2
GND
4A1
4A2
5A1
5A2
6A1
6A2
7A1
7A2
V
CC
8A1
GND
8A2
9A1
9A2
10A1
10A2
11A1
11A2
12A1
12A2
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
S1
S2
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
Sx
xAx
xBx
Data Select
Port A Inputs or Outputs
Port B Inputs or Outputs
Description
FUNCTION TABLE
(1)
S
2
L
L
L
L
H
H
H
H
Inputs
S
1
L
L
H
H
L
L
H
H
S
0
L
H
L
H
L
H
L
H
Inputs/Outputs
A
1
A
2
Z
B
1
B
2
Z
Z
Z
B
1
B
2
Z
Z
Z
B
1
B
2
Z
B
2
B
1
Operation
Disconnect
A
1
port = B
1
port
A
1
port = B
2
port
A
2
port = B
1
port
A
2
port = B
2
port
Disconnect
A
1
port = B
1
port
A
2
port = B
2
port
A
1
port = B
2
port
A
2
port = B
1
port
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
Z = High-Impedance
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
IDT74CBTLV16212
LOW-VOLTAGE 24-BIT BUS EXCHANGE 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)
V
CC
= 3V
V
I
= 2.4V
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.
Parameter
Control Inputs, Data I/O
Control Inputs
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
= 0V, V
I
or V
O
= 0V or 3.6V
V
CC
= 3.6V, I
O
= 0, V
I
= V
CC
or GND
Min.
—
—
—
—
—
—
—
—
I
O
= 64mA
I
O
= 24mA
I
O
= 15mA
I
O
= 64mA
I
O
= 24mA
I
O
= 15mA
—
—
—
—
—
—
Typ.
(1)
—
—
—
—
—
—
5
13.5
5
5
27
5
5
10
Max.
–1.2
±1
5
10
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 (switch off)
V
I
= 0
V
I
= 1.7V
V
I
= 0
Ω
SWITCHING CHARACTERISTICS
V
CC
= 2.5V ± 0.2V
Symbol
t
PD(1)
t
PD
t
EN
t
DIS
Propagation Delay
A to B or B to A
Propagation Delay
S to A or B
Output Enable Time
S to A or B
Output DisableTime
S 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 when driven by an ideal voltage source
(zero output impededance).
V
CC
= 3.3V ± 0.3V
Min.
—
3
3
2
Max.
0.25
8.8
8.6
8.8
Unit
ns
ns
ns
ns
Parameter
Min.
—
3
3
1
Max.
0.15
11.1
10.9
8.7
3
IDT74CBTLV16212
LOW-VOLTAGE 24-BIT BUS EXCHANGE 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.
NOTE:
1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH.
