1
PS8170C 04/11/02
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Product Features
Near-zero propagation delay
5-ohm switches connect inputs to outputs when enabled
Fast Switching Speed - 4ns max.
Pin compatible with 74 series 16244
Operating Vcc: 3.0V to 3.6V
Industrial operating temperature: 40C to +85C
Packages available:
48-pin 240 mil wide thin plastic TSSOP (A)
48-pin 300 mil wide plastic SSOP (V)
Product Description
Pericom Semiconductors PI3B series of logic circuits are produced
using the Companys advanced submicron CMOS technology.
The PI3B16244 is a 16-bit, 4-port bus switch that is pin compatible
with the 74 series 16244 16-bit driver. Four enable signals (nBE) turn
the switch on similar to the enable signals of the 16244. The bus
switch creates no additional propagation delay or ground bounce
noise.
PI3B16244
3.3V, 16-Bit, 4-Port NanoSwitch
Logic Block Diagram
Product Pin Description
Truth Table
(1)
Note:
1. H
= High Voltage Level
L
= Low Voltage Level
Hi-Z = High Impedance
Product Pin Configuration
1
BE
1
1
B
0
2
1
B
1
3
GND
4
1
B
2
5
1
B
3
6
V
CC
7
2
B
0
8
2
B
1
9
GND
10
2
B
2
11
2
B
3
12
3
B
0
13
3
B
1
14
GND
15
3
B
2
16
3
B
3
17
V
CC
18
4
B
0
19
4
B
1
20
GND
21
4
B
2
22
4
B
3
23
4
BE
24
2
BE
48
1
A
0
47
1
A
1
46
GND
45
1
A
2
44
1
A
3
43
V
CC
42
2
A
0
41
2
A
1
40
GND
39
2
A
2
38
2
A
3
37
3
A
0
36
3
A
1
35
GND
34
3
A
2
33
3
A
3
32
V
CC
31
4
A
0
30
4
A
1
29
GND
28
4
A
2
27
4
A
3
26
3
BE
25
48-Pin
A, V
n
o
it
c
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u
F
E
B
n
7
-
0
A
n
t
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si
D
H
Z
-i
H
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C
L
7
-
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m
a
N
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A
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O
s
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B
7
A
n
-
0
A
n
O
/I
A
s
u
B
7
B
n
-
0
B
n
O
/I
B
s
u
B
2
BE
1
BE
1
B
1
1
B
0
1
A
1
1
A
0
1
B
1
1
B
0
1
A
3
1
A
2
2
B
1
2
B
0
2
A
1
2
A
0
2
B
3
2
B
2
2
A
3
2
A
2
4
BE
3
BE
3
B
1
3
B
0
3
A
1
3
A
0
3
B
1
3
B
0
3
A
3
3
A
2
4
B
1
4
B
0
4
A
1
4
A
0
4
B
3
4
B
2
4
A
3
4
A
2
B
A
BE
SW
SW
SW
SW
SW
SW
SW
SW
SW
SW
SW
SW
SW
SW
SW
SW
SW
PI3B16244
3.3V, 16-Bit, 4-Port NanoSwitch
2
PS8170C 04/11/02
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DC Electrical Characteristics
(Over the Operating Range, T
A
= 40C to +85C, V
CC
= 3.0V to 3.6V)
Capacitance
(T
A
= 25C, f = 1 MHz)
Storage Temperature ...................................................... 65C to +150C
Ambient Temperature with Power Applied ...................... 40C 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
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 specifica-
tion 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.)
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.
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1
PI3B16244
3.3V, 16-Bit, 4-Port NanoSwitch
3
PS8170C 04/11/02
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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.
PI3B16244 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.
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Applications Information
Logic Inputs
Logic control inputs can be driven up to +5.5V regardless of the supply voltage. For example, given a 5.0V supply, the control or
select pins may be driven low to 0V and high to 5.5V. Driving the control or select pins Rail-toRail
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 the
input/output or control pins.
PI3B16244
3.3V, 16-Bit, 4-Port NanoSwitch
4
PS8170C 04/11/02
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Pericom Semiconductor Corporation
2380 Bering Drive San Jose, CA 95131 1-800-435-2336 Fax (408) 435-1100 http://www.pericom.com
48-pin 240 Mil-Wide Thin Plastic TSSOP (A) Package
48-pin 300 Mil-Wide Plastic SSOP (V) Package
.236
.244
.488
.496
.002
.006
SEATING PLANE
.007
.010
.0197
BSC
.004
.008
.319
1
48
12.4
12.6
6.0
6.2
0.50
0.17
0.27
8.1
0.05
0.15
0.09
0.20
X.XX
X.XX
DENOTES DIMENSIONS
IN MILLIMETERS
.018
.030
0.45
0.75
.047
1.20 Max
BSC
0.20
0.51
1.01
0.25
0.381
0.635
.008
.008
.016
0-8
0.20
0.40
.110 2.79
.010
Gauge Plane
.02
.04
.015
.025
x 45
.025 BSC
0.635
.291
.299
X.XX
X.XX
DENOTES DIMENSIONS
IN MILLIMETERS
7.39
7.59
.395
.420
10.03
10.67
.620
.630
15.75
16.00
.008
.0135
0.20
0.34
1
48
Nom.
Max
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4
Ordering Information
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