1
PS8181E 09/10/04
1
2
3
4
5
6
7
GND
8
9
10
11
12
13
14
15
16
17
18
19
20
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
A
1
A
3
1
B
2
2
B
2
A
5
1
B
4
2
B
4
A
7
V
CC
1
B
6
2
B
6
A
9
1
B
8
2
B
8
A
11
1
B
10
2
B
10
A
10
A
12
1
B
11
2
B
11
A
8
1
B
7
2
B
7
A
6
1
B
5
2
B
5
1
B
9
2
B
9
1
B
12
2
B
12
A
4
1
B
3
2
B
3
A
2
S
1
1
B
1
2
B
1
GND
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Features
R
ON
is 5-ohm typical at 3.3V
Low power: 10W
Industrial operating temperature: 40C to +85C
Near zero propagation delay
Fast switching speed: 4.5ns max.
V
CC
operating range: 3.0V to 3.6V
500 -ohm pulldown to unconnected B port
Series 25-ohm resistor option on all outputs
Make-before-break action
Packaging (Pb-free & Green available):
40-pin BQSOP (B)
Description
Pericom Semiconductor's PI3B16224 is a 3.3V, 12-bit to 24-bit mux/
demux bus switch designed with a low On-Resistance allowing
inputs to be connected directly to outputs.
PI3B16224
3.3V, 12-Bit to 24-Bit
DeMux/Mux NanoSwitch
TM
Block Diagram
Truth Table
(1)
Pin Configuration
40-Pin
B
A1
1B1
2B1
500
A12
S1
1B12
2B12
500
B
A
S
SW
n
o
i
t
c
n
u
F
1
S
A
B
1
o
t
A
L
B
1
B
2
o
t
A
H
B
2
2
PS8181E 09/10/04
PI3B16224
3.3V, 12-Bit to 24-Bit
DeMux/Mux NanoSwitch
TM
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Notes:
1. This parameter is guaranteed but not tested on Propagation Delays.
2. 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.
3. See test circuit and waveforms.
Notes:
1. Typical values are shown at V
CC
= 3.3V, +25C ambient and maximum loading.
Switching Electrical Characteristics
(T
A
= 40C to +85C, V
CC
= 3.0 to 3.6V)
s
r
e
t
e
m
a
r
a
P
n
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p
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o
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d
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C
t
s
e
T
)
1
(
.
n
i
M
.
p
y
T
)
2
(
.
x
a
M
s
t
i
n
U
V
H
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e
g
a
tl
o
V
H
G
I
H
t
u
p
n
I
l
e
v
e
L
h
g
i
H
c
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g
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L
d
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e
t
n
a
r
a
u
G
0
.
2
V
V
L
I
e
g
a
tl
o
V
W
O
L
t
u
p
n
I
l
e
v
e
L
w
o
L
c
i
g
o
L
d
e
e
t
n
a
r
a
u
G
5
.
0
8
.
0
I
H
I
t
n
e
r
r
u
C
H
G
I
H
t
u
p
n
I
V
C
C
V
;.
x
a
M
=
N
I
V
=
C
C
1
A
I
L
I
t
n
e
r
r
u
C
W
O
L
t
u
p
n
I
V
C
C
V
;.
x
a
M
=
N
I
=
D
N
G
1
I
H
Z
O
t
n
e
r
r
u
C
t
u
p
t
u
O
e
c
n
a
d
e
p
m
I
h
g
i
H
0
B
,
A
V
C
C
1
V
K
I
e
g
a
tl
o
V
e
d
o
i
D
p
m
a
l
C
V
C
C
I
,
n
i
M
=
N
I
A
m
8
1
=
7
.
0
2
.
1
V
R
N
O
e
c
n
a
t
s
i
s
e
R
n
O
h
c
ti
w
S
V
C
C
V
,.
n
i
M
=
N
I
I
,
V
0
.
0
=
N
O
A
m
2
1
=
5
8
R
N
O
e
c
n
a
t
s
i
s
e
R
n
O
h
c
ti
w
S
V
C
C
V
,.
n
i
M
=
N
I
I
,
V
4
.
2
=
N
O
A
m
2
1
=
0
1
5
1
C
N
I
e
c
n
a
ti
c
a
p
a
C
t
u
p
n
I
V
N
I
z
H
M
1
=
f
,
C
5
2
,
V
0
=
0
.
3
F
p
C
N
O
e
c
n
a
ti
c
a
p
a
C
B
/
A
V
N
I
z
H
M
1
=
f
,
C
5
2
,
V
0
=
0
.
5
2
I
C
C
t
n
e
c
s
e
i
u
Q
y
l
p
p
u
S
r
e
w
o
P
0
1
A
DC Electrical Characteristics
(Over the Operating Range, T
A
= 40C to +85C, V
CC
= 3.0 to 3.6V)
Storage Temperature Range, T
STG .........................................
65C to +150C
Ambient Temperature with Power Applied ..................... 40C to +85C
Supply Voltage Range, to Ground Potential .................... 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.
Maximum Ratings
(Above which useful life may be impaired. For user guidelines, not tested.)
s
r
e
t
e
m
a
r
a
P
n
o
i
t
p
i
r
c
s
e
D
s
n
o
i
t
i
d
n
o
C
t
s
e
T
4
2
2
6
1
B
3
I
P
s
t
i
n
U
.
m
o
C
.
n
i
M
.
x
a
M
t
H
L
P
x
B
x
o
t
x
A
y
a
l
e
D
n
o
it
a
g
a
p
o
r
P
C
L
R
,
F
p
0
5
=
L
s
m
h
o
0
0
5
=
)
3
,
2
,
1
(
0
5
2
s
p
t
E
P
e
l
b
a
n
E
s
u
B
C
L
R
,
F
p
0
5
=
L
s
m
h
o
0
0
5
=
)
3
(
1
5
.
4
s
n
t
D
P
e
l
b
a
s
i
D
s
u
B
1
0
.
5
t
M
e
m
it
k
a
e
r
b
-
e
r
o
f
e
b
-
e
k
a
M
C
L
R
,
F
p
0
5
=
L
s
m
h
o
0
0
5
=
)
1
(
0
2
3
PS8181E 09/10/04
PI3B16224
3.3V, 12-Bit to 24-Bit
DeMux/Mux NanoSwitch
TM
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Core
Logic
CPU
100 MHz
72
72
72 Bits
100 MHz
6 of 3B16224
(64 Bits Data,
8 Bits ECC)
72:144 Bus Switch
128M
DIMM
128M
DIMM
Application Circuit
Memory Switching Application
Pericom Semiconductor Corporation
2380 Bering Drive San Jose, CA 95131 1-800-435-2336 Fax (408) 435-1100 http://www.pericom.com
Packaging Mechanical: 40-pin BQSOP (B)
X.XX
X.XX
DENOTES DIMENSION IN MILLIMETERS
Application Information
Logic Inputs
The logic control inpus 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-toRail minimizes
power consumption.
Power-Supply Sequencing and Hot Plug Information
Proper power-supply sequencing is advised for all CMOS devices.
It is recommended to always apply V
CC
and GND before applying
signals to the input/output or control pins.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd
Ordering Information
Notes:
1. Thermal Characteristics can be found on the world wide web at: www.pericom.com/packaging/
Ordering Code
Package Code
Package Description
PI3B16224B
B
40-pin BQSOP
PI3B16224BE
B
Pb-free & Green, 40-pin BQSOP
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