1
PS8177A 12/14/98
Features
Near-zero propagation delay
5
switches connect inputs to outputs
Fast Switching Speed - 5ns (max.)(16292)
Internal 500
pull-down on A
2
ports
Ultra-low quiescent power (0.2A typical) Ideally
suited for notebook applications
Vcc Operating Range : 3.0V to 3.6V
Industrial operating temperature: 40C to +85C
Make-before-break switching
Packages available:
56-pin 240-mil wide thin plastic TSSOP (A)
56-pin 300-mil wide plastic SSOP (V)
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
PI3B16292
PI3B162292 (25
)
Description
Pericom Semiconductor's PI3B series of logic circuits are produced
using the Company's advanced 0.35 micron CMOS technology.
The PI3B16292 and PI3B162292 are 3.3 volt, 12-bit to 24-bit
Mux/Demux Bus switches designed with a low ON resistance
allowing inputs to be connected directly to outputs.
The PI3B162292 device has a built-in 25-ohm series resistor
to reduce noise resulting from reflections, thus eliminating the
need for an external terminating resistor.
A2 port is not externally connected and, as a result, has an internal
500-ohm pulldown resistor to ground.
Pin Configuration
Function
S0
A1
A2
A1 to B1, A2 to B2
L
B1
B2
A1 to B2, A2 to B1
H
B2
B1
Logic Block Diagram
Product Pin Description
Pin Name
I/O
Description
S
0
I
Select Inputs
xA1
I/O
Bus A
xB
x
I/O
Bus B
NC
Leave it unconnected
NC1
Leave it unconnected
Note:
1.
H = High Voltage Level
L = Low Voltage Level
Z = High Impedance
Truth Table
56-PIN
A, V
Applications
Memory switching
1
2
3
4
5
6
7
GND
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
1
A
1
NC1
S
0
2
A
1
NC1
3
A
1
NC1
4
A
1
NC1
5
A
1
NC1
6
A
1
NC1
V
CC
7
A
1
NC1
8
A
1
GND
NC1
9
A
1
NC1
10
A
1
NC1
11
A
1
NC1
12
A
1
NC1
GND
1
B
1
1
B
2
NC
2
B
1
2
B
2
3
B
1
3
B
2
4
B
1
4
B
2
5
B
1
5
B
2
6
B
1
6
B
2
7
B
1
7
B
2
8
B
1
GND
8
B
2
9
B
1
9
B
2
10
B
1
10
B
2
11
B
1
11
B
2
12
B
1
12
B
2
NC
3.3Volt, 24-Bit
Mux/Demux BusSwitch
2
PS8177A 12/14/98
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
PI3B16292/162292
3.3V, 24-Bit Mux/Demux
BusSwitch (25
)
DC Electrical Characteristics
(Over the Operating Range, T
A
= 40C to +85C, V
CC
= 3.0V to 3.6V)
Parameters Description
Test Conditions
(1)
Min.
Typ
(2)
Max.
Units
V
IH
Input HIGH Voltage
Guaranteed Logic HIGH Level
2.0
--
--
V
V
IL
Input LOW Voltage
Guaranteed Logic LOW Level
0.5
--
0.8
V
I
I
Input Current
V
CC
= Max., V
IN
= V
CC
or GND
--
--
1
A
V
CC
= 0, V
IN
= V
CC
--
--
10
A
V
IK
Clamp Diode Voltage
V
CC
= Min., I
IN
= 18mA
--
0.7
1.2
V
R
ON
Switch On Resistance
(3)
V
CC
= Min., V
IN
= 0.0V,
16292
--
5
8
I
ON
= 64mA
162292
20
28
40
V
CC
= Min., V
IN
= 2.4V,
16292
--
10
15
I
ON
= 15mA
162292
20
35
48
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 ................................................................ 0.5Watt
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.
Capacitance
(T
A
= 25C, f = 1 MHz)
Parameters
(4)
Description
Test Conditions
Max.
Units
C
IN
Input Capacitance
V
IN
= 0V
3.0
pF
C
ON
A/B Capacitance, Switch On
V
IN
= 0V
30.0
pF
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.
2. Typical values are at Vcc = 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.)
3
PS8177A 12/14/98
PI3B16292/162292
3.3V, 24-Bit Mux/Demux
BusSwitch (25
)
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
Power Supply Characteristics
Parameters
Description
Test Conditions
(1)
Min.
Typ
(2)
Max.
Units
I
CC
Quiescent Power
V
CC
= M
AX
.
V
IN
= GND or V
CC
--
--
10
A
Supply Current
I
CC
(3)
Supply Current for
V
CC
= M
AX
.
V
IN
= 3.0 V
(4)
--
--
750
A
S0
@ TTL HIGH
Other Inputs at V
CC
OR
GND
I
CCD
Supply Current for
V
CC
= Max.,
--
--
0.25
mA/
S0 per MHz
(5)
A and B Pins Open
MHz
Toggling 50% Duty Cycle
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for applicable device.
2. Typical values are at Vcc = 3.3V, +25C ambient.
3. This is the increase in supply current for S0
at the specified TTL voltage level rather than V
CC
or GND.
4. Per driven input ( S0 only); A and B pins do not contribute to Icc.
5. 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.
PI3B16292 Switching Characteristics over Operating Range
Com.
Parameters
Description
Conditions
(1)
Min.
Max.
Units
t
PLH
Propagation Delay
(2,3)
--
0.25
t
PHL
xA1 to xBx, xBx to xA1
t
PZH
Bus Enable time
1
4.5
ns
t
PZL
S to xA1 or xBx
t
PHZ
Bus Disable time
1
5.0
t
PLZ
S to xA1 or xBx
t
m
Make-before-break time
(2)
0
2
PI3B162292 Switching Characteristics over Operating Range
Notes:
1. See test circuit and waveforms.
2. This parameter is guaranteed but not tested.
3. The bus switch contributes no propagational delay other than the RC delay of the ON resistance of the switch and 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 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
PLZ
and t
PZL
.
C
L
= 50 pF
R
L
= 500
R = 500
to 6V
(4)
Com.
Parameters
Description
Conditions
(1)
Min.
Max.
Units
t
PLH
Propagation Delay
(2,3)
--
1.25
t
PHL
xA1 to xBx, xBx to xA1
t
PZH
Bus Enable time
1
5
ns
t
PZL
S to xA1 or xBx
t
PHZ
Bus Disable time
1
5.5
t
PLZ
S to xA1 or xBx
t
m
Make-before-break time
(2)
0
2
C
L
= 50 pF
R
L
= 500
R = 500
to 4.6V
(4)
4
PS8177A 12/14/98
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
PI3B16292/162292
3.3V, 24-Bit Mux/Demux
BusSwitch (25
)
Pericom Semiconductor Corporation
2380 Bering Drive San Jose, CA 95131 1-800-435-2336 Fax (408) 435-1100 http://www.pericom.com
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
56-Pin SSOP (300 MIL WIDE) - Package Code: V56
.002
.006
SEATING PLANE
.07
.011
.004
.008
1
56
.236
.244
0.50
0.17
0.27
0.05
0.15
0.09
0.20
X.XX
X.XX
DENOTES DIMENSIONS IN MILLIMETERS
.018
.030
0.45
0.75
.047
Max.
1.20
6.0
6.2
.547
.555
13.9
14.1
.319
8.1
.0197
BSC
BSC
56-Pin TSSOP (240 MIL WIDE) - Package Code: A56
PDF 
ZIP