1
PS7040A 04/23/99
Function
S2
S1
S0
A1
Disconnect
L
L
L
Z
A1 to B1
L
L
H
B1
A1 to B2
L
H
L
B2
Disconnect
L
H
H
Z
Disconnect
H
L
L
Z
A1 to B3
H
L
H
B3
A1 to B1
H
H
L
B1
A1 to B2
H
H
H
B2
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Truth Table
(1)
Note:
1. H = High Voltage Level
L = Low Voltage Level
Z = High Impedance
Pin Name
I/O
Description
SO-S2
I
Select Inputs
xAx
I/O
Bus A
xBx
I/O
Bus B
Product Pin Description
Product Pin Configuration
PI5C16214
PI5C162214 (25
)
12-Bit, 3-To-1 Bus-Select Switch
Features
Near-zero propagation delay
5
switches connect inputs to outputs
Direct bus connection when switches are ON
Ultra-low quiescent power (0.2A typical)
ideally suited for notebook applications
Industrial operating temperature: 40C to +85C
Packages available:
56-pin 240-mil wide plastic TSSOP (A)
56-pin 300-mil wide plastic SSOP (V)
Product Description
Pericom Semiconductors PI5C series of BusSwitch circuits
are produced in the Companys advanced 0.8 micron CMOS
technology, achieving industry leading speed.
The PI5C16214 and PI5C162214 are 3-to-1 bus-select switches
designed with a low ON resistance (5
) allowing inputs to be
connected directly to outputs. These devices operate as 12-bit bus
switches via the data select pins (S0-S2).
The PI5C162214 device has a built-in 25-ohm series resistor to
reduce noise resulting from reflections, thus eliminating the need
for an external terminating resistor.
Logic Block Diagram
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
S
0
1
A
1
1
B
3
2
A
1
2
B
3
3
A
1
3
B
3
GND
4
A
1
4
B
3
5
A
1
5
B
3
6
A
1
6
B
3
7
A
1
7
B
3
V
CC
8
A
1
GND
8
B
3
9
A
1
9
B
3
10
A
1
10
B
3
11
A
1
11
B
3
12
A
1
12
B
3
S
1
S
2
1
B
1
1
B
2
2
B
1
2
B
2
3
B
1
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
32
31
30
29
56-Pin
A, V
1
A
1
1
B
3
S
0
S
1
S
2
ONE OF TWELVE CHANNELS
1
B
2
1
B
1
FLOW CONTROL
2
PS7040A 04/23/99
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PI5C16214/162214
3-to-1 Bus-Select Switch
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Storage Temperature ............................................................ 65C to +150C
Ambient Temperature with Power Applied ........................... 40C to +85C
Supply Voltage to Ground Potential (Inputs & Vcc Only) ..... 0.5V to +7.0V
Supply Voltage to Ground Potential (Outputs & D/O Only) .. 0.5V to +7.0V
DC Input Voltage .................................................................... 0.5V to +7.0V
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 con-
ditions above those indicated in the operational sec-
tions 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
= 40C to +85C, V
CC
= 4 to 5V)
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
= 5.5V., V
IN
= 5.5V
OR
GND
--
--
1
A
V
CC
= 0V, V
IN
= V
CC
--
--
1
A
I
OZH
High Impedance Output Current
0
A, B
V
CC
--
--
10
A
V
IK
Clamp Diode Voltage
V
CC
= 4.5V, I
IN
= 18mA
--
0.7
1.2
V
I
OS
Short Circuit Current
(3)
A (B) = 0V, B (A) = V
CC
100
--
--
mA
V
H
Input Hysteresis at Control Pins
--
150
--
mV
R
ON
Switch On Resistance
(4)
V
CC
= 4.5V, V
IN
= 0.0V,
16214
--
5
7
I
ON
= 30mA, 64mA
162214
20
28
40
V
CC
= 4.5V, V
IN
= 2.4V,
16214
--
--
15
I
ON
= 15mA
162214
20
35
48
V
CC
= 4 V, V
IN
= 2.4V,
16214
--
14
20
I
ON
= 15mA
Capacitance
(T
A
= 25C, f = 1 MHz)
Parameters
(5)
Description
Test Conditions
Typ
Units
C
IN
Input Capacitance
V
IN
= 0V or 3V
4.5
pF
C
OFF
A/B Capacitance, Switch Off
V
IN
= 0V or 3V
5.5
pF
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the
applicable device type.
2. Typical values are at Vcc = 5.0V, T
A
= 25C ambient and maximum loading.
3. Not more than one output should be shorted at one time. Duration of the test should not exceed one
second.
4. Measured by the voltage drop between A and B pin at indicated current through the switch. ON resis-
tance is determined by the lower of the voltages on the two (A,B) pins.
5. This parameter is determined by device characterization but is not production tested.
PI5C16214/162214
3-to-1 Bus-Select Switch
3
PS7040A 04/23/99
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Power Supply Characteristics
Parameters Description
Test Conditions
(1)
Min.
Typ
(2)
Max.
Units
I
CC
Quiescent Power
V
CC
= Max.
V
IN
= GND or V
CC
0.1
10
A
Supply Current
I
CC
Supply Current per
V
CC
= Max.
V
IN
= 3.4V
(3)
2.5
mA
Input @ TTL HIGH
I
CCD
Supply Current per
V
CC
= Max.,
0.25
mA/
Input per MHz
(4)
A and B Pins Open
MHz
Control Input Toggling
50% Duty Cycle
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.
2. Typical values are at Vcc = 5.0V, +25C ambient.
3. Per TTL driven input (V
IN
= 3.4V, control inputs only); A and B pins do not contribute to Icc.
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.
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.
PI5C16214
Vcc = 5V 0.5V
Parameters
Description
Conditions
(1)
Min.
Max.
Units
t
PLH
Propagation Delay
(2,3)
C
L
= 50pF
0.25
t
PHL
Ax to Bx, Bx to Ax
R
L
= 500
t
PZH
Bus Enable Time
1.5
6.5
ns
t
PZL
X
OE to Ax or Bx
t
PHZ
Bus Disable Time
1.5
5.5
t
PLZ
X
OE to Ax or Bx
Pericom Semiconductor Corporation
2380 Bering Drive San Jose, CA 95131 1-800-435-2336 Fax (408) 435-1100 http://www.pericom.com
PI5C162214
Vcc = 5V 0.5V
Parameters
Description
Conditions
(1)
Min.
Max.
Units
t
PLH
Propagation Delay
(2,3)
C
L
= 50pF
1.25
t
PHL
Ax to Bx, Bx to Ax
R
L
= 500
t
PZH
Bus Enable Time
1.5
6.5
ns
t
PZL
X
OE to Ax or Bx
t
PHZ
Bus Disable Time
1.5
5.5
t
PLZ
X
OE to Ax or Bx
PI5C16214 Switching Characteristics over Operating Range
PI5C162214 Switching Characteristics over Operating Range
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