IDT IDT74CBTLVR16292PA

IDT74CBTLVR16292
LOW-VOLTAGE 12-BIT 1:2 MUX / DEMUX BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
LOW-VOLTAGE 12-BIT 1:2
MUX / DEMUX BUS SWITCH
WITH INTERNAL PULL DOWN
RESISTORS
IDT74CBTLVR16292
DESCRIPTION:
FEATURES:
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.
•
•
•
•
•
•
•
•
Isolation Under Power-Off Conditions
Make-before-break feature
Over-voltage tolerant
Ω pull-down resistor to GND
Internal 500Ω
Ω series dampening resistors
Both A and B ports have 25Ω
Latch-up performance exceeds 100mA
VCC = 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
APPLICATIONS:
• 3.3V High Speed Bus Switching and Bus Isolation
• Resource sharing
FUNCTIONAL BLOCK DIAGRAM
54
2
1A
SIMPLIFIED SCHEMATIC, EACH
SWITCH
1B1
SW
RPULLDOWN
RPULLDOWN
A
53
SW
12A
27
B
1B2
30
SW
12B1
RPULLDOWN
SELECT CONTROL
CIRCUITRY
RPULLDOWN
SW
S
30
12B2
1
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
AUGUST 2002
1
c
2002 Integrated Device Technology, Inc.
DSC-5891/4
IDT74CBTLVR16292
LOW-VOLTAGE 12-BIT 1:2 MUX / DEMUX BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS(1)
Symbol
S
1
56
NC
VCC
1A
2
55
NC
VI
NC
3
54
1B1
2A
4
53
1B2
NC
5
52
2B1
3A
6
51
2B2
NC
7
50
3B1
GND
8
49
GND
4A
9
48
3B2
NC
10
47
4B1
5A
11
46
4B2
NC
12
45
5B1
6A
13
44
5B2
NC
14
43
6B1
7A
15
42
6B2
NC
16
41
7B1
VCC
17
40
7B2
8A
18
39
8B1
GND
19
38
GND
NC
20
37
8B2
9A
21
36
9B1
NC
22
35
9B2
10A
23
34
10B1
NC
24
33
10B2
11A
25
32
11B1
NC
26
31
11B2
12A
27
30
12B1
NC
28
29
12B2
IIK
TSTG
Description
Max.
Unit
Supply Voltage Range
–0.5 to 4.6
V
Input Voltage Range
–0.5 to 4.6
V
Continuous Channel Current
128
mA
Input Clamp Current, VI/O < 0
–50
mA
–65 to +150
°C
Storage Temperature Range
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
Description
S
Select Input
xAx
Port A Inputs or Outputs
xBx
Port B Inputs or Outputs
FUNCTION TABLE(1)
Input
S
Operation
L
A Port = B1 Port
RPULLDOWN = B2 Port
H
A Port = B2 Port
RPULLDOWN = B1 Port
SSOP/ TSSOP/ TVSOP
TOP VIEW
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
OPERATING CHARACTERISTICS(1)
Symbol
Parameter
VCC
Supply Voltage
VIH
High-Level Control Input Voltage
VIL
Low-Level Control Input Voltage
TA
Operating Free-Air Temperature
Test Conditions
Min.
Max.
Unit
2.3
3.6
V
VCC = 2.3V to 2.7V
1.7
—
V
VCC = 2.7V to 3.6V
2
—
VCC = 2.3V to 2.7V
—
0.7
VCC = 2.7V to 3.6V
NOTE:
1. All unused control inputs of the device must be held at VCC or GND to ensure proper device operation.
2
—
0.8
–40
+85
V
°C
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: TA = –40°C to +85°C
Symbol
VIK
II
Parameter
Test Conditions
Control Inputs, Data I/O
VCC = 3V, II = –18mA
Control Inputs
VCC = 3.6V, VI = VCC or GND
VCC = 0V, VI or VO = 0V or 3.6V
IOFF
ICC
Typ.(1)
Max.
—
—
–1.2
V
—
—
±1
µA
—
—
10
µA
Min.
Unit
VCC = 3.6V, IO = 0, VI = VCC or GND
—
—
10
µA
∆ICC(2)
Control Inputs
VCC = 3.6V, one input at 3V, other inputs at VCC or GND
—
—
300
µA
CI
Control Inputs
VI = 3.3V or 0
—
3.5
—
pF
CIO(OFF)
A port or B port
VO = 3.3V or 0
—
23
—
pF
Max. at VCC = 2.3V
VI = 0
IO = 64mA
—
30
47
IO = 24mA
—
30
47
VI = 1.7V
IO = 15mA
—
36
80
VI = 0
IO = 64mA
—
30
42
IO = 24mA
—
30
42
IO = 15mA
—
32
47
Typ. at VCC = 2.5V
RON(3)
VCC = 3V
VI = 2.4V
Ω
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 VCC 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
VCC = 2.5V ± 0.2V
Symbol
tPD(1)
Parameter
Propagation Delay
VCC = 3.3V ± 0.3V
Min.
Max.
Min.
Max.
Unit
—
0.9
—
1.5
ns
3.2
8.5
3.2
8
ns
1
6.5
1
5.8
ns
1
5.3
1
4.6
ns
0
2
0
2
ns
A to B or B to A
tPD(2)
Propagation Delay
S to A
tEN
Output Enable Time
S to B
tDIS
Output Disable Time
S to B
tMB/B(3,4)
Make-Before-Break Time
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 VCC or 0 for
2.5V±0.2V on B1 and B2 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.
3
IDT74CBTLVR16292
LOW-VOLTAGE 12-BIT 1:2 MUX / DEMUX BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
TEST CIRCUITS AND WAVEFORMS
TEST CONDITIONS
Symbol
VCC(1)= 3.3V±0.3V
VCC(2)= 2.5V±0.2V
Unit
VLOAD
6
2 x Vcc
V
VIH
3
Vcc
V
VT
1.5
Vcc / 2
V
VLZ
300
150
mV
VHZ
300
150
mV
CL
50
30
pF
SAME PHASE
INPUT TRANSITION
tPLH
tPHL
tPLH
tPHL
OUTPUT
VIH
VT
0V
VOH
VT
VOL
VIH
VT
0V
OPPOSITE PHASE
INPUT TRANSITION
Propagation Delay
VLOAD
VCC
500Ω
Pulse(1, 2)
Generator
VIN
CONTROL
INPUT
GND
tPZL
VOUT
D.U.T.
RT
DISABLE
ENABLE
Open
OUTPUT
SWITCH
NORMALLY
CLOSED
LOW
tPZH
OUTPUT SWITCH
NORMALLY
OPEN
HIGH
500Ω
CL
Test Circuits for All Outputs
SWITCH POSITION
Switch
VLOAD
tPHZ/tPZH
GND
tPD
Open
tPHZ
VT
0V
Enable and Disable Times
NOTES:
1. Pulse Generator for All Pulses: Rate ≤ 10MHz; tF ≤ 2.5ns; tR ≤ 2.5ns.
2. Pulse Generator for All Pulses: Rate ≤ 10MHz; tF ≤ 2ns; tR ≤ 2ns.
Test
VLOAD/2
VT
VLOAD/2
VOL + VLZ
VOL
VOH
VOH -VHZ
0V
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
the output control S.
DEFINITIONS:
CL = Load capacitance: includes jig and probe capacitance.
RT = Termination resistance: should be equal to ZOUT of the Pulse Generator.
tPLZ/tPZL
tPLZ
VIH
VT
0V
4
IDT74CBTLVR16292
LOW-VOLTAGE 12-BIT 1:2 MUX / DEMUX BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
CBTLV
IDT
XX
Temp. Range
X
Family
XXX
Device Type
XX
Package
CORPORATE HEADQUARTERS
2975 Stender Way
Santa Clara, CA 95054
PV
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PF
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16292
Low-Voltage 12-Bit Mux / Demux Bus Switch
with Internal Pull Down Resistors
R
25Ω series dampening resistors on A and B ports
74
–40°C to +85°C
for SALES:
800-345-7015 or 408-727-6116
fax: 408-492-8674
www.idt.com
5
for Tech Support:
[email protected]
(408) 654-6459