1
PS8176D 09/29/04
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PI3B16211
3.3V, Hot Insertion, 24-Bit BusSwitch
Description
Pericom Semiconductor's PI3B16211 is a 3.3 volt, hot insertion, 24-
bit bus switch designed with a low On-Resistance allowing inputs
to be connected directly to outputs. This device operates as a 24-
bit or a as 12-bit bus switch that provides high-speed bus switching.
Features
Near-Zero propagation delay
5-ohm switches connect inputs to outputs
Fast Switching Speed - 4.5ns max.
Permits Hot Insertion
V
CC
operating range: 3.0V to 3.6V
Industrial operating temperature: 40C to +85C
Packaging (Pb-free & Green available):
56-pin 240-mil wide thin plastic TSSOP (A)
56-pin 300-mil wide plastic SSOP (V)
56-pin 173-mil wide thin plastic TVSOP (K)
Block Diagram
Pin Configuration
Truth Table
Pin Description
Note:
1. H = High Voltage Level, L = Low Voltage Level
Z = High Impedance
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
25
26
27
28
32
31
30
29
NC
1A1
1A2
1A3
1A4
1A5
1A6
GND
1A7
1A8
1A9
1A10
1A11
1A12
2A1
2A2
V
CC
2A3
GND
2A4
2A5
2A6
2A7
2A8
2A9
2A10
2A11
2A12
1OE
2OE
1B1
1B2
1B3
1B4
1B5
GND
1B6
1B7
1B8
1B9
1B10
1B11
1B12
2B1
2B2
2B3
GND
2B4
2B5
2B6
2B7
2B8
2B9
2B10
2B11
2B12
E
O
1
E
O
2
s
O
/
I
B
1
,
A
1
s
O
/
I
B
2
,
A
2
L
L
B
1
=
A
1
B
2
=
A
2
L
H
B
1
=
A
1
Z
H
L
Z
B
2
=
A
2
H
H
Z
Z
1A1
1OE
2OE
1A12
2A1
2A12
2B1
2B12
12B1
1B12
e
m
a
N
n
i
P
O
/
I
n
o
i
t
p
i
r
c
s
e
D
E
O
2
,
E
O
1
I
s
t
u
p
n
I
t
c
e
l
e
S
x
A
x
O
/
I
A
s
u
B
x
B
x
O
/
I
B
s
u
B
2
PS8176D 09/29/04
PI3B16211
3.3V, Hot Insertion,
24-Bit Bus Switch
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Capacitance
(T
A
= 25C, f = 1 MHz)
DC Electrical Characteristics
(Over the Operating Range, T
A
= 40C to +85C, V
CC
= 3.0V to 3.6V
Storage Temperature ...................................................... 65C to +150C
Ambient Temperature with Power Applied ........................ 0C to +85C
Supply Voltage Range ....................................................... 0.5V to +4.6V
DC Input Voltage ............................................................... 0.5V to +4.6V
DC Output Current ........................................................................ 120 mA
Power Dissipation ............................................................................. 0.5W
Note:
Stresses greater than those listed under MAXIMUM RAT-
INGS 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.
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at V
CC
= 3.3V, T
A
= 25C ambient and maximum loading.
3. Measured by the voltage drop between A and B pin at indicated current through the switch. On-Resistance is determined by the lower of the
voltages on the two (A,B) pins.
4. This parameter is determined by device characterization but is not production tested.
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
s
r
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m
a
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a
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I
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I
V
C
C
V
;.
x
a
M
=
N
I
V
=
C
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1
A
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L
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r
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;.
x
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M
=
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I
=
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1
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0
B
,
A
V
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1
V
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tl
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p
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=
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I
A
m
8
1
=
7
.
0
2
.
1
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3
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C
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V
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M
=
N
I
I
,
V
0
.
0
=
N
O
A
m
4
6
r
o
A
m
8
4
=
V
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n
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M
=
N
I
I
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V
4
.
2
=
N
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A
m
5
1
=
5
0
1
8
5
1
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a
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P
)
5
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V
0
=
0
.
3
F
p
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F
F
O
f
f
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c
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c
n
a
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B
/
A
5
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c
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a
ti
c
a
p
a
C
B
/
A
0
.
7
1
PI3B16211
3.3V, Hot Insertion,
24-Bit Bus Switch
3
PS8176D 09/29/04
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Power Supply Characteristics
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.
2. Typical values are at V
CC
= 3.3V, +25C ambient.
3. Per TTL driven input (control inputs only); A and B pins do not contribute to I
CC
.
4. This current applies to the control inputs only and represent the current required to switch internal capacitance at the specified frequency.
The A and B inputs generate no significant AC or DC currents as they transition. This parameter is not tested, but is guaranteed by design.
R
L
= 500-ohms
,
R = 500-ohms
(4)
Switching Characteristics over Operating Range
Notes:
1. See test circuit and waveforms.
2. This parameter is guaranteed but not tested on Propagation Delays.
3. The bus switch contributes no propagational delay other than the RC delay of the On-Resistance of the switch and the load capacitance. The
time constant for the switch alone is of the order of 0.25ns for 50pF load. Since this time constant is much smaller than the rise/fall times of
typical driving signals, it adds very little propagational delay to the system. Propagational delay of the bus switch when used in a system is
determined by the driving circuit on the driving side of the switch and its interaction with the load on the driven side.
4. Applies to t
PZX
, t
PXZ
.
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5
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4
PS8176D 09/29/04
PI3B16211
3.3V, Hot Insertion,
24-Bit Bus Switch
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Packaging Mechanical: 56-Pin TSSOP (A)
Packaging Mechanical: 56-Pin SSOP (V)
0.25
0.20
.025 BSC
0.635
.008
.008
.016
0-8
0.20
0.40
.110 2.79
.010
Gauge Plane
.291
.299
X.XX
X.XX
DENOTES DIMENSIONS
IN MILLIMETERS
7.39
7.59
.396
.416
10.06
10.56
.02
.04
0.51
1.01
.015
.025
0.381
0.635
.720
.730
18.29
18.54
.008
.0135
0.20
0.34
1
56
x 45
Nom.
Max
PI3B16211
3.3V, Hot Insertion,
24-Bit Bus Switch
5
PS8176D 09/29/04
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Packaging Mechanical: 56-Pin TVSOP (K)
.047
.031
.041
SEATING
PLANE
.016
BSC
1
56
.169
.177
11.20
11.40
4.30
4.50
1.20
0.40
0.13
0.23
0.80
1.05
X.XX
X.XX
DENOTES DIMENSIONS
IN MILLIMETERS
.002
.006
0.05
0.15
.0035
.008
0.09
0.20
.018
.030
0.45
0.75
6.4
.252
BSC
.005
.009
.441
.449
Max.
Notes:
1. Thermal characteristics can be found on the company web site at www.pericom.com/packaging/
Ordering Information
Ordering Code
Package Code
Package Type
PI3B16211A
A
56-pin 240-mil wide TSSOP
PI3B16211AE
A
Pb-free & Green, 56-pin 240-mil wide TSSOP
PI3B1621V
V
56-pin 300-mil wide SSOP
PI3B16211VE
V
Pb-free & Green, 56-pin 300-mil wide SSOP
PI3B16211K
K
56-pin 173-mil wide TVSOP
PI3B16211KE
K
Pb-free & Green, 56-pin 173-mil wide TVSOP
Pericom Semiconductor Corporation 1-800-435-2336 www.pericom.com
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