1
PS8140A 05/08/02
NC
1A
1
1A
2
1A
3
1A
4
1A
5
1A
6
GND
1A
7
1A
8
1A
9
1A
10
2A
1
2A
2
V
CC
2A
3
GND
2A
4
2A
5
2A
6
2A
7
2A
8
2A
9
2A
10
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1OE
2OE
1B
1
1B
2
1B
3
1B
4
1B
5
GND
1B
6
1B
7
1B
8
1B
9
1B
10
2B
1
2B
2
2B
3
GND
2B
4
2B
5
2B
6
2B
7
2B
8
2B
9
2B
10
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
Product Description:
Pericom Semiconductor's PI5C series of BusSwitch circuits are
produced in the Company's advanced sub-micron CMOS
technology, achieving industry leading speed.
The PI5C16210 is configured as 20-bit, 2-port bus switches
designed with a low ON resistance (5
Ohm) allowing inputs to be
connected directly to outputs. The bus switch creates no additional
propagational delay or additional ground bounce noise. The
switches are turned ON by the Bus Enable (xOE) input signal.
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Truth Table
(1)
Note:
1. H = High Voltage Level
L = Low Voltage Level
Hi-Z = High Impedance
Pin Name
Description
1OE, 2OE
Bus Enable Inputs (Active LOW)
1A1-1A10, 2A1-2A10
Bus A
1B1 - 1B10, 2B1 - 2B10
Bus B
Product Pin Description
Product Pin Configuration
PI5C16210
20-Bit, 2-Port Bus Switch
Product Features:
Near-zero propagation delay
5
Ohm
switches connect inputs to outputs
Direct bus connection when switches are ON
32X384 function with flow through pinout make board
layout easier
Ultra-low quiescent power (0.5W typical)
ideally suited for notebook applications
Industrial operating temperature: 40C to +85C
Packages available:
48-pin 150-mil wide plastic BQSOP (B)
48-pin 173-mil wide plastic TVSOP (K)
48-pin 240-mil wide plastic TSSOP (A)
48-pin 300-mil wide plastic SSOP (V)
Logic Block Diagram
48-Pin
A48
B48
K 4 8
V48
1OE
1A
10
1A
1
1B
10
1B
1
2OE
2A
10
2A
1
2B
10
2B
1
s
t
u
p
n
I
s
t
u
p
t
u
O
/
s
t
u
p
n
I
E
O
1
E
O
2
B
1
,
A
1
B
2
,
A
2
L
L
B
1
=
A
1
B
2
=
A
2
L
H
B
1
=
A
1
Z
H
L
Z
B
2
=
A
2
H
H
Z
Z
PI5C16210
20-Bit, 2-Port Bus Switch
2
PS8140A 05/08/02
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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 ................................................................................... 120 mA
Power Dissipation ......................................................................................... 0.5W
Note:
Stresses greater than those listed under MAXI-
MUM 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 reli-
ability.
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
= 18 mA
--
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, I
ON
= 30 mA, 64 mA
--
5
7
ohm
V
CC
= 4.5V, V
IN
= 2.4V, I
ON
= 15 mA
--
--
15
ohm
V
CC
= 4 V, V
IN
= 2.4V, I
ON
= 15 mA
--
14
20
ohm
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 resistance 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.
PI5C16210
20-Bit, 2-Port Bus Switch
3
PS8140A 05/08/02
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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 wave forms.
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 0.25 ns for 50 pF 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.
Switching Characteristics over Operating Range
PI5C16210
Vcc = 5V 0.5V
V
CC
= 4V
Parameters
Description
Conditions
(1)
Min
Max
Min
Max
Unit
t
PLH
Propagation Delay
(2,3)
C
L
= 50 pF
0.25
0.25
ns
t
PHL
Ax to Bx, Bx to Ax
R
L
= 500
ohm
t
PZH
Bus Enable Time
1.5
6.5
6.3
ns
t
PZL
X
OE to Ax or Bx
t
PHZ
Bus Disable Time
1.5
5.5
5.5
ns
t
PLZ
X
OE to Ax or Bx
PI5C16210
20-Bit, 2-Port Bus Switch
4
PS8140A 05/08/02
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Packaging Mechanical: 48-pin BQSOP (B48)
.014
.0157 BSC
0.40
0.356
.008 0.20
.002
.009
5
0.05
0.25
.079
2.0
.010 0.25
Gauge Plane
.150
.157
X.XX
X.XX
DENOTES DIMENSIONS
IN MILLIMETERS
3.80
4.00
.228
.244
5.80
6.20
.020
.029
0.50
0.75
.063
1.60
.015 0.381
.386
.394
9.80
10.00
.0051
.009
0.13
0.23
1
48
x 45
BSC
Nom
Max
Nom
REF
Packaging Mechanical: 48-pin TVSOP (K48)
.378
.386
.047
.031
.041
SEATING
PLANE
.0051
.009
.016
BSC
1
48
.169
.177
9.60
9.80
4.30
4.50
0.40
0.13
0.23
0.80
1.05
X.XX
X.XX
DENOTES DIMENSIONS
IN MILLIMETERS
.002
.006
0.05
0.15
.0035
.008
0.09
0.20
.018
.030
0.45
0.75
.252
BSC
6.4
Max.
1.20
PI5C16210
20-Bit, 2-Port Bus Switch
5
PS8140A 05/08/02
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Packaging Mechanical: 48-pin TSSOP (A48)
Packaging Mechanical: 48-pin SSOP (V48)
.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
PI5C16210
20-Bit, 2-Port Bus Switch
6
PS8140A 05/08/02
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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
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