21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B16215
3.3V, 20-Bit
NanoSwitch™
w/Precharged Outputs
Product Features
• Near-Zero Propagation Delay
• 5-ohm Switches Connect Between Two Ports
• Fast Switching Speed: 4.5ns (max.)
• B-Port Outputs are precharged by Bias Voltage
to minimize signal distortion during live insertion
• Package options include:
– 48-pin 240-mil wide plastic TSSOP (A)
– 48-pin 150-mil wide plastic BQSOP (B)
Product Description
The PI3B16215 provides 20-bits of high-speed bus switching. The
switches low ON-state resistance allows connections to be made
with minimal propagation delay also precharges the B-port to a user-
selectable bias voltage (BIASV) to minimize live- insertion noise.
The device is organized as dual 10-bit bus switches with individual
output-enable (OE) inputs. When OE is LOW, the corresponding
10-bit bus switch is on and port A is connected to port B. When OE
is HIGH, the switch is open, a high-impedance state exists between
the two ports, and port B is precharged to BIASV through the
equivalent of a 10k-ohm resistor.
To ensure the high-impedance state on 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 connected to OE.
Logic Block Diagram
1
1A1
2
46
BIASV
1B1
Product Pin Configuration
BIASV
1A1
1A2
1A3
SW
1A10
12
SW
36 1B10
1A4
1A5
1A6
1OE
48
GND
1A7
1A8
2A1
13
SW
35
2B1
1A9
1A10
2A1
2A10
24
SW
25
2B10
2A2
V
CC
2A3
2OE
47
GND
SW
2A4
2A5
2A6
2A7
A
B
2A8
2A9
2A10
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
1OE
2OE
1B1
1B2
1B3
1B4
1B5
GND
1B6
1B7
1B8
1B9
1B10
2B1
2B2
2B3
GND
2B4
2B5
2B6
2B7
2B8
2B9
2B10
OE
07-0003
1
PS8190F
05/08/06
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B16215
3.3V, 20-Bit
NanoSwitch™
w/Precharged Outputs
Maximum Ratings
(Above which useful life may be impaired. For user guidelines, not tested.)
Storage Temperature Range, T
STG ......................................
–65ºC to +150ºC
Supply Voltage Range, V
CC
......................................... –0.5V to +4.6V
Bias Voltage Range, BIASV ........................................ –0.5V to +4.6V
Input Voltage Range ........................................................–0.5V to +4.6V
DC Output Current ....................................................................... 120mA
Power Dissipation ............................................................................ 0.5W
Note:
Stresses greater than those listed under 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.
Electrical Characteristics
(Over the Operating Range, T
A
= –40°C to +85°C, V
CC
= 3.0V to 3.6V)
Parame te r
BIASV
V
IH
V
IL
V
IK
I
I
I
OZH
I
O
I
CC
ΔI
CC(1)
De s cription
Bias Voltage
High- Level Control Input Voltage
Low- Level Control Input Voltage
Clamp Diode Voltage
Input Current
High Impedance Output Current
Output Current
Quiescent Power Supply Current
Supply Current
V
CC
= 2.7V to 3.6V
V
CC
= 2.7V to 3.6V
V
CC
= 3.0V
V
CC
= 3.6V
V
CC
= 0
V
CC
= 3.0V
V
CC
= 3.6V
V
CC
= 3.6V
I
I
= –18mA
V
I
= V
CC
or GND
V
I
= V
O
= 0 to 3.6V
BIASV = 2.4V, V
O
= 0
I
O
= 0, V
I
= V
CC
or GND
One Input at 3V,
Other Inputs at V
CC
or
GND
3.0
Switch Off
I
I
= 64mA
I
I
= 24mA
V
I
= 2.4V
I
I
= 15mA
8.5
5
5
10
8
8
15
Ω
0.15
10
750
μA
Te s t Conditions
M in.
0
2
–0.5
–0.7
0. 8
–1.2
±5
10
μA
mA
Typ.
M a x.
V
CC
V
Units
C
IN
C
OFF
R
ON(2)
Input Capacitance
A/B Capacitance Switch Off
Switch On Resistance
V
I
= 3.0V or 0
V
O
= 3.0V or 0
V
I
= 0
pF
Notes:
1. This is the increase in supply current for each input (OE only) that is at the specified voltage level rather than V
CC
or GND.
2. 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.
Truth Table
OE
L
H
A port = B port
A port = Z, B Port = BIASV
Function
07-0003
2
PS8190F
05/08/06
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2109876543212109876543210987654321098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B16215
3.3V, 20-Bit
NanoSwitch™
w/Precharged Outputs
Switching Characteristics over Operating Range
(Switching characteristics over recommended operating free-air temperature range unless otherwise noted)
V
CC
= 3.3V ±10%
Parame te r
t
PD(1)
t
PZH
t
PZL
t
PHZ
t
PLZ
BIASV = GND
BIASV = 3V
BIASV = GND
BIASV = 3V
OE
A or B
Te s t Conditions
From (Input)
A or B
To (Output)
B or A
M in.
M a x.
0.2 5
4.5
4.5
5.0
5.0
ns
Units
Note:
1. The propagation delay is the calculated RC time of the typical on-state resistance of the switch and the specified load
capacitance, when driven by an ideal voltage source (zero output impedance).
Parameter Measurements
(V
CC
= 2.7 and 3.3V ±10%)
6V
500Ω
From Output
Under Test
C
L
= 50pF
(See
Note
1)
500Ω
S1
Open
GND
Test
t
PD
t
PLZ
/t
PZL
t
PHZ
/t
PZH
S1
Open
6V
GND
LOAD CIRCUIT
Output
Control
(Low Level
Enabling)
2.7V
2.7V
1.5V
t
PZL
1.5V
V
OL
+0.3V
t
PHZ
1.5V
V
OH
-0.3V
V
OH
0V
V
OL
t
PLZ
3V
1.5V
0V
(See Note 4)
Input
t
PLH
(See Note 5)
1.5V
1.5V
0V
t
PHL
V
OH
1.5V
1.5V
V
OL
Output
Waveform 1
S1 at 2x
V
CC
(see
Note
2) t
PZH
Output
Waveform 2
S1 at GND
(see
Note
2)
(See Note 3)
Output
Voltage Waveforms Propagation Delay Times
Voltage Waveforms Enable and Disable Times
(See Note 6)
Figure 1. Load Circuit and Voltage Waveforms
Notes:
1. C
L
includes probe and jig capacitance.
2. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
3. Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
4. All input impulses are supplied by generators with the following characteristics: PRR≤10 MHz, Z
O
=50-ohm, t
R
≤2.5ns,
t
F
≤
2.5ns.
5. The outputs are measured one at a time with one transition per measurement.
6. t
TPZ
and t
PHZ
are the same as, t
DIS
, t
PZL
and t
PZH
are the same as t
EN
, t
PLH
and t
PHL
are the same as t
PD
.
07-0003
3
PS8190F
05/08/06
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B16215
3.3V, 20-Bit
NanoSwitch™
w/Precharged Outputs
Packaging Mechanical: 48-Pin TSSOP (A) Package
48
.236
.244
6.0
6.2
1
.488 12.4
.496 12.6
.047
1.20 Max
SEATING PLANE
.004 0.09
.008 0.20
0.45 .018
0.75 .030
.319
BSC
8.1
X.XX
X.XX
DENOTES DIMENSIONS
IN MILLIMETERS
.0197
BSC
0.50
.007
.010
0.17
0.27
.002
.006
0.05
0.15
Packaging Mechanical: 48-Pin BQSOP (B) Package
48
.150
.157
3.80
4.00
.228
.244
5.80
6.20
Gauge Plane
.010 0.25
BSC
.386
.394
9.80
10.00
.020
.029
0.50
0.75
1
.015 0.381 x 45˚
.008 0.20
Nom
Nom
.063 1.60
.079
2.0
Max
.002 0.05
.009 0.25
.014 0.356
REF
5˚
.0157 BSC
0.40
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
.0051
.009
0.13
0.23
07-0003
4
PS8190F
05/08/06
Applications Information
Logic Inputs
The logic control inputs can be driven up to +3.6V regardless of the supply voltage. For example, given a +3.3V supply, IN may be driven
low to 0V and high to 3.6V. Driving IN Rail-to-Rail
®
minimizes power consumption.
Power-Supply Sequencing and Hot Plug Information
Proper power-supply sequencing is recommended for all CMOS devices. Always apply V
CC
and GND before applying signals to input/
output or control pins.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B16215
3.3V, 20-Bit
NanoSwitch™
w/Precharged Outputs
Ordering Information
Orde ring Code
PI3B16215A
PI3B16215B
Package Code
A
B
Package De s cripton
48- pin 240- mil wide TSSOP
48- pin 150- mil wide BQSOP
Notes:
•
Thermal characteristics can be found on the company web site at www.pericom.com/packaging/
•
Adding an X suffix = Tape/Reel
Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com
07-0003
5
PS8190F
05/08/06
京公网安备 11010802033920号
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