21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B16292
PI3B162292 (25Ω)
Ω
Features
•
•
•
•
•
•
•
•
•
Near-zero propagation delay
5Ω switches connect inputs to outputs
Fast Switching Speed - 5ns (max.)(16292)
Internal 500Ω pull-down on A
2
ports
Ultra-low quiescent power (0.2µA typical) – Ideally
suited for notebook applications
Vcc Operating Range : 3.0V to 3.6V
Industrial operating temperature: –40°C to +85°C
Make-before-break switching
Packages available:
– 56-pin 240-mil wide thin plastic TSSOP (A)
– 56-pin 300-mil wide plastic SSOP (V)
Description
3.3Volt, 24-Bit
Mux/Demux BusSwitch
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
S
0
1
A
1
NC1
2
A
1
NC1
3
A
1
NC1
GND
4
A
1
NC1
5
A
1
NC1
6
A
1
NC1
7
A
1
Applications
• Memory switching
Logic Block Diagram
1
2
3
4
5
6
7
8
56
55
NC
NC
1
B
1
1
B
2
2
B
1
2
B
2
3
B
1
Ω
NC1
V
CC
8
A
1
GND
NC1
9
A
1
NC1
Truth Table
Function
A1 to B1, A2 to B2
A1 to B2, A2 to B1
S0
L
H
A1
B1
B2
A2
B2
B1
10
A
1
NC1
11
A
1
NC1
12
A
1
54
53
52
51
50
49
9
48
10
47
11
46
12
56-PIN
45
13
A, V
44
14
43
15
42
16
41
17
40
18
39
19
38
20
37
21
36
22
35
23
34
24
33
25
32
26
31
27
28
30
29
GND
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
NC1
Note:
1. H = High Voltage Level
L = Low Voltage Level
Z = High Impedance
Product Pin Description
Pin Name
S
0
xA1
xB
x
NC
NC1
I/O
I
I/O
I/O
Description
Select Inputs
Bus A
Bus B
Leave it unconnected
Leave it unconnected
1
PS8177A
12/14/98
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B16292/162292
3.3V, 24-Bit Mux/Demux
BusSwitch (25Ω)
Ω
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Storage Temperature ............................................ –65°C to +150°C
Ambient Temperature with Power Applied ............. –0°C to +85°C
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.
DC Electrical Characteristics
(Over the Operating Range, T
A
= –40°C to +85°C, V
CC
= 3.0V to 3.6V)
Parameters Description
V
IH
V
IL
I
I
V
IK
R
ON
Input HIGH Voltage
Input LOW Voltage
Input Current
Clamp Diode Voltage
Switch On Resistance
(3)
Test Conditions
(1)
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
V
CC
= Max., V
IN
= V
CC
or GND
V
CC
= 0, V
IN
= V
CC
V
CC
= Min., I
IN
= –18mA
V
CC
= Min., V
IN
= 0.0V,
I
ON
= 64mA
V
CC
= Min., V
IN
= 2.4V,
I
ON
= 15mA
16292
162292
16292
162292
Min.
2.0
–0.5
—
—
—
—
20
—
20
Typ
(2)
—
—
—
—
–0.7
5
28
10
35
Max.
—
0.8
±1
10
–1.2
8
40
15
48
Ω
Units
V
V
µA
µA
V
Ω
Capacitance
(T
A
= 25°C, f = 1 MHz)
Parameters
(4)
C
IN
C
ON
Description
Input Capacitance
A/B Capacitance, Switch On
Test Conditions
V
IN
= 0V
V
IN
= 0V
Max.
3.0
30.0
Units
pF
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
= 25°C 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.
2
PS8177A
12/14/98
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B16292/162292
3.3V, 24-Bit Mux/Demux
BusSwitch (25Ω)
Ω
Power Supply Characteristics
Parameters
I
CC
∆I
CC(3)
I
CCD
Description
Quiescent Power
Supply Current
Supply Current for
S0 @ TTL HIGH
Supply Current for
S0 per MHz
(5)
Toggling 50% Duty Cycle
V
CC
= M
AX
.
V
CC
= M
AX
.
V
CC
= Max.,
A and B Pins Open
Test Conditions
(1)
V
IN
= GND or V
CC
V
IN
= 3.0 V
(4)
Other Inputs at V
CC OR
GND
Min.
—
—
—
Typ
(2)
—
—
—
Max.
10
750
0.25
Units
µA
µA
mA/
MHz
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, +25°C 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
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
m
Description
Propagation Delay
(2,3)
xA1 to xBx, xBx to xA1
Bus Enable time
S to xA1 or xBx
Bus Disable time
S to xA1 or xBx
Make-before-break time
(2)
Conditions
(1)
Min.
—
C
L
= 50 pF
R
L
= 500Ω
R = 500Ω to 6V
(4)
1
1
0
Max.
0.25
4.5
5.0
2
ns
Units
PI3B162292 Switching Characteristics over Operating Range
Com.
Parameters
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
m
Description
Conditions
(1)
Min.
—
1
1
0
Max.
1.25
5
5.5
2
Units
Propagation Delay
(2,3)
xA1 to xBx, xBx to xA1
Bus Enable time
C
L
= 50 pF
S to xA1 or xBx
R
L
= 500Ω
Bus Disable time
R = 500Ω to 4.6V
(4)
S to xA1 or xBx
Make-before-break time
(2)
ns
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
.
3
PS8177A
12/14/98
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B16292/162292
3.3V, 24-Bit Mux/Demux
BusSwitch (25Ω)
Ω
56-Pin SSOP (300 MIL WIDE) - Package Code: V56
56
.291
.299
7.39
7.59
.396
.416
10.06
10.56
Gauge Plane
.010 0.25
.02
.04
0.51
1.01
1
.720
.730
18.29
18.54
.015 0.381 x 45˚
.025 0.635
.008 0.20
Nom.]
.110 2.79
Max
.008
.0135
0.20
0.34
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
0-8˚
.008 0.20
.016 0.40
.025 BSC
0.635
56-Pin TSSOP (240 MIL WIDE) - Package Code: A56
56
.236
.244
6.0
6.2
1
.547
.555
13.9
14.1
1.20
.047
Max.
SEATING PLANE
.004
.008
0.45
0.75
.0197
BSC
0.50
.07
.011
0.17
0.27
.002
.006
0.05
0.15
.018
.030
0.09
0.20
.319
BSC
8.1
X.XX
DENOTES DIMENSIONS IN MILLIMETERS
X.XX
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
4
PS8177A
12/14/98
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