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 CBTLV16211 operates as a single 24-bit bus switch or as a dual
12-bit bus switch, which provides high speed switching. This device has
very low ON resistance, resulting in under 250ps propagation delay
throughout the switch. When Output Enable (OE) is low, the corresponding
12-bit bus switch is on and port A is connected to Port B. When
OE
is high,
the switch is off and a high impedance exists between Port A and Port B.
To ensure the high-impedance state during power up or power down,
OE
should be tied to V
CC
through a pullup resistor.
APPLICATIONS:
• 3.3V High Speed Bus Switching and Bus Isolation
FUNCTIONAL BLOCK DIAGRAM
2
1A1
54
SIMPLIFIED SCHEMATIC, EACH
SWITCH
1B1
SW
1A12
14
SW
42
1B12
A
56
1OE
B
2A1
15
SW
41
2B1
OE
2A12
28
SW
29
2B12
55
2OE
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-5888/4
IDT74CBTLV16211
LOW-VOLTAGE 24-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
NC
1
A
1
1
A
2
1
A
3
1
A
4
1
A
5
1
A
6
ABSOLUTE MAXIMUM RATINGS
(1)
Symbol
Description
Supply Voltage Range
Input Voltage Range
Continuous Channel Current
I
IK
T
STG
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
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
1
OE
2
OE
1
B
1
1
B
2
1
B
3
1
B
4
1
B
5
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
V
CC
V
I
GND
1
A
7
1
A
8
1
A
9
1
A
10
1
A
11
1
A
12
2
A
1
2
A
2
GND
1
B
6
1
B
7
1
B
8
1
B
9
1
B
10
1
B
11
1
B
12
2
B
1
2
B
2
2
B
3
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
xOE
xAx
xBx
Description
Output Enable (Active LOW)
Port A Inputs or Outputs
Port B Inputs or Outputs
V
CC
2
A
3
GND
2
A
4
2
A
5
2
A
6
2
A
7
2
A
8
2
A
9
2
A
10
2
A
11
2
A
12
GND
2
B
4
2
B
5
2
B
6
2
B
7
2
B
8
2
B
9
2
B
10
2
B
11
2
B
12
FUNCTION TABLE
(EACH 12-BIT BUS SWITCH)
(1)
Input
OE
L
H
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
Operation
A-Port = B-Port
Disconnect
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
IDT74CBTLV16211
LOW-VOLTAGE 24-BIT 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
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)
—
—
—
—
—
—
4
6.5
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,
OE
= V
CC
V
I
= 0
V
I
= 1.7V
V
I
= 0
Ω
SWITCHING CHARACTERISTICS
V
CC
= 2.5V ± 0.2V
Symbol
t
PD(1)
t
EN
t
DIS
Propagation Delay
A to B or B to A
Output Enable Time
OE
to A or B
Output Disable time
OE
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.
—
1
1
Max.
0.25
6.2
7.7
Unit
ns
ns
ns
Parameter
Min.
—
1
1
Max.
0.15
7
7.2
3
IDT74CBTLV16211
LOW-VOLTAGE 24-BIT 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.
NOTE:
1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH.
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