1
IDT74CBTLV3384
LOW-VOLTAGE 10-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
SEPTEMBER 2001
2001 Integrated Device Technology, Inc.
DSC-5742/1
c
IDT74CBTLV3384
PRELIMINARY
INDUSTRIAL TEMPERATURE RANGE
FUNCTIONAL BLOCK DIAGRAM
LOW-VOLTAGE 10-BIT
BUS SWITCH
SIMPLIFIED SCHEMATIC, EACH
SWITCH
DESCRIPTION:
The CBTLV3384 is a ten bit high-speed bus switch with low on-state
resistance of the switch allowing connections to be made with minimal
propagation delay.
The device is organized as dual 5-bit bus switches with separate output-
enable (
OE) inputs, to allow use as two 5-bit bus switches or one 10-bit bus
switch. When
OE is low, the associated 5-bit bus switch is on and A port is
connected to B port. 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.
3
11
1
1A1
1A5
1OE
SW
SW
1B5
1B1
2
10
14
22
13
2A1
2A5
2OE
SW
SW
2B5
2B1
15
10
O E
A
B
FEATURES:
-
5
A/B bi-directional 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
APPLICATIONS:
-
3.3V High Speed Bus Switching and Bus Isolation
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
2
INDUSTRIAL TEMPERATURE RANGE
IDT74CBTLV3384
LOW-VOLTAGE 10-BIT BUS SWITCH
PIN CONFIGURATION
SSOP/ QSOP/ TSSOP
TOP VIEW
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.
V
C C
2A
5
2A
4
2B
4
2B
3
2A
3
2A
2
2B
2
2B
1
1B
1
1A
1
1A
2
1B
2
1B
3
1A
3
1A
4
1B
4
1B
5
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
1
1O E
21
22
23
24
2A1
2O E
1A
5
G ND
2B
5
SO 24-7
SO 24-8
SO 24-9
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.
FUNCTIONAL TABLE
(1)
Inputs
Inputs/Outputs
1OE
2OE
1B1-1B5
2B1-2B5
L
L
1A1-1A5
2A1-2A5
L
H
1A1-1A5
Z
H
L
Z
2A1-2A5
H
H
Z
Z
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
Z = High-Impedance
3
IDT74CBTLV3384
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
= 40°C to +85°C
Symbol
Parameter
Test Conditions
Min.
Typ.
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
µ
A
I
OZ
Data I/O
V
CC
= 3.6V, V
O
= 0 or 3.6V, switch disabled
--
--
5
µ
A
I
OFF
V
CC
= 0, V
I
or V
O
= 0 to 3.6V
--
--
50
µ
A
I
CC
V
CC
= 3.6V, I
O
= 0, V
I
= V
CC
or GND
--
--
10
µ
A
I
CC
(1)
Control Inputs
V
CC
= 3.6V, One input at 3V
,
Other inputs at V
CC
or GND
--
--
300
µ
A
C
I
Control Inputs
V
I
= 3V or 0
--
4
--
pF
C
IO(OFF)
V
O
= 3V or 0,
OE = V
CC
--
7
--
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
(2)
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. The increase in supply current is attributable to each input that is at the specified voltage level rather than V
CC
or GND.
2. This is measured by the voltage drop between the A and B terminals at the indicated current through the switch. On-state resistance is determined
by the lower of the voltages of the two (A or B) terminals.
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
5
1
4.3
ns
t
DIS
Output Disable Time
OE to A or B
1
5.5
1
5.5
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
IDT74CBTLV3384
LOW-VOLTAGE 10-BIT BUS SWITCH
O pen
V
LO AD
G ND
V
CC
Pulse
G enerator
D.U.T.
500
500
C
L
R
T
V
IN
V
O UT
(1, 2)
SAM E PHAS E
INPUT TRANSITIO N
O PPOSITE PHASE
INPUT TRANSITIO N
0V
0V
V
O H
V
O L
t
PLH
t
PHL
t
PHL
t
PLH
O UTPUT
V
IH
V
T
V
T
V
IH
V
T
CO NTRO L
INPUT
t
PLZ
0V
O UTPUT
NO RMA LLY
LO W
t
PZH
0V
SW IT CH
CLOSED
O UTPUT
NO RMA LLY
HIGH
ENABLE
DISABLE
SW ITCH
OP EN
t
PHZ
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
HZ
TEST CIRCUITS AND WAVEFORMS
PROPAGATION DELAY
TEST CIRCUITS FOR ALL OUTPUTS
ENABLE AND DISABLE TIMES
TEST CONDITIONS
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
SWITCH POSITION
Test
Switch
t
PLZ
/t
PZL
V
LOAD
t
PHZ
/t
PZH
GND
t
PD
Open
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.
DEFINITIONS:
1. C
L
= Load capacitance: includes jig and probe capacitance.
2.
R
T
= Termination Resistance: Should be equal to Z
OUT
of the pulse
generator.
NOTES:
1. Diagram shown for input Control Enable-LOW and input Control
Disable-HIGH.
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IDT74CBTLV3384
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 Outline Package (S O24-7)
Quarter-size Small Outline Package (SO24-8)
Thin Shrink Small Outline Package (SO24-9)
Low -Voltage 10-Bit Bus Switch
40°C to +85°C
3384
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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