1
IDT74CBTLV3861
LOW-VOLTAGE 10-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
DECEMBER 2000
2000 Integrated Device Technology, Inc.
DSC-5741/-
c
IDT74CBTLV3861
INDUSTRIAL TEMPERATURE RANGE
FUNCTIONAL BLOCK DIAGRAM
LOW-VOLTAGE 10-BIT
BUS SWITCH
DESCRIPTION:
The CBTLV3861 provides ten bits of high-speed bus switching with
low on-state resistance of the switch allowing connections to be made
with minimal propagation delay.
The device is organized as one 10-bit bus switch. When output
enable (
OE) is low, the 10-bit bus switch is on and port A is connected
to port B. When
OE is high, the switch is open and a high-impedance
state exists between the two ports.
To ensure the high-impedance state during power up or power down,
OE should be tied to V
CC
through a pullup resistor; the minimum value
of the resistor is determined by the current-sinking capability of the
driver.
APPLICATIONS:
3.3V High Speed Bus Switching and Bus Isolation
2
11
23
A1
A10
O E
SW
SW
B10
B1
22
13
SIMPLIFIED SCHEMATIC, EACH
SWITCH
FEATURES:
5
A/B bidirectional 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
O E
A
B
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
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INDUSTRIAL TEMPERATURE RANGE
IDT74CBTLV3861
LOW-VOLTAGE 10-BIT 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
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.
FUNCTION TABLE
(1)
Input
Operation
OE
L
A Port = B Port
H
Disconnect
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
PIN CONFIGURATION
SSOP/ QSOP/ TSSOP
TOP VIEW
A
10
11
B
9
14
A
9
10
B
8
15
GND
12
B
10
13
V
CC
24
1
NC
OE
A
1
2
23
B
1
A
2
3
22
B
2
A
3
4
21
B
3
A
4
5
20
B
4
A
5
6
19
B
5
A
6
7
18
B
6
A
7
8
17
B
7
A
8
9
16
SO24-7
SO24-8
SO24-9
OPERATING CHARACTERISTICS, T
A
= 25
C
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.
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IDT74CBTLV3861
LOW-VOLTAGE 10-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Operating Condition: T
A
= 40C to +85C
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, Data I/O
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
--
--
50
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
--
4
--
pF
C
IO(OFF)
V
O
= 3V or 0,
OE = V
CC
--
6
--
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
NOTES:
1. Typical values are at V
CC
= 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
V
CC
= 3.3V 0.3V
Symbol
Parameter
Min.
Max.
Min.
Max.
Unit
t
PD
(1)
Propagation Delay
A to B or B to A
--
0.15
--
0.25
ns
t
EN
Output Enable Time
OE to A or B
1
4.5
1
4.2
ns
t
DIS
Output Disable Time
OE to A or B
1
5
1
5
ns
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 impedance).
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INDUSTRIAL TEMPERATURE RANGE
IDT74CBTLV3861
LOW-VOLTAGE 10-BIT BUS SWITCH
Open
V
LO AD
GN D
V
C C
Pulse
Generator
D .U .T.
500
500
C
L
R
T
V
IN
V
O U T
(1, 2)
SAM E PHASE
IN PUT TR ANSITION
OPPO SITE PH ASE
IN PUT TR ANSITION
0V
0V
V
OH
V
O L
t
PLH
t
PH L
t
PH L
t
PLH
OU TPU T
V
IH
V
T
V
T
V
IH
V
T
C ON TR OL
IN PUT
t
PLZ
0V
OU TPU T
N OR M A LLY
LOW
t
P Z H
0V
SW ITCH
CLO SE D
OU TPU T
N OR M A LLY
H IGH
ENABLE
D IS AB LE
SW ITCH
O P E N
t
PH Z
0V
V
O L +
V
LZ
V
O H
V
T
V
T
t
PZL
V
LO AD /2
V
LO AD /2
V
IH
V
T
V
O L
V
O H -
V
H Z
TEST CIRCUITS AND WAVEFORMS
TEST CONDITIONS
PROPAGATION DELAY
TEST CIRCUITS FOR ALL OUTPUTS
ENABLE AND DISABLE TIMES
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
V
CC
/2
V
V
LZ
300
150
mV
V
HZ
300
150
mV
C
L
50
30
pF
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
1.0MHz; t
F
2.5ns; t
R
2.5ns
2. Pulse Generator for All Pulses: Rate
1.0MHz; t
F
2ns; t
R
2ns
NOTE:
1. Diagram shown for input Control Enable-LOW and input Control
Disable HIGH
Test
Switch
t
PLZ
/t
PZL
V
LOAD
t
PHZ/
t
PZH
GND
t
PD
Open
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IDT74CBTLV3861
LOW-VOLTAGE 10-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDT
XX
CBTLV
XXX
XX
Package
Device Type
Tem p. R ange
PY
Q
PG
74
Shrink Sm all O utline Package (SO 24-7)
Q uarter-size Sm all Outline Package (SO 24-8)
Thin Shrink Sm all O utline Package (SO 24-9)
Low-Voltage 10-Bit Bus Switch
40C to +85C
3861
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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