1
PS8193B 11/09/98
Logic Block Diagram
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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
Product Features
Near-zero propagation delay
5
or
25
switches connect inputs to outputs
Fair Switching Speed - 4.5ns max.
32X384 function with flow through pinout make board
layout easier
Permits Hot Insertion.
Vcc Operating Range: 3.0V to 3.6V
Industrial operating temperature: 40C to +85C
Packages available:
48-pin 150-mil wide plastic QSOP (B)
48-pin 240-mil wide plastic TSSOP (A)
48-pin 300-mil wide plastic SSOP (V)
Product Description
Pericom Semiconductor's PI3B series of BusSwitch circuits are
produced in the Company's advanced 0.35 micron CMOS
technology, achieving industry leading speed.
The PI3B16210 is configured as 3.3 volt 20-bit, 2-port bus
switches designed with a low ON resistance (5
) 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.
The PI3B162210 device has a built-in 25-ohm series resistor to
reduce noise resulting from reflections, thus eliminating the need
for an external terminating resistor.
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
PI3B16210
PI3B162210 (25
)
3.3V, Hot Insertion 20-Bit, 2-Port BusSwitch
48-Pin
2
PS8193B 11/09/98
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PI3B16210/162210
3.3V, Hot Insertion, 20-Bit, 2-Port BusSwitch
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
= 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
= Min, I
IN
= 18mA
--
0.7
1.2
V
R
ON
Switch On Resistance
(3)
V
CC
= 3V, V
IN
= 0.0V,
16210
--
5
8
I
ON
= 24 mA, 64mA
162210
20
28
40
V
CC
= 3V, V
IN
= 2.4V,
16210
--
--
15
I
ON
= 15mA
162210
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 ......................................................................................... 0.5W
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 opera-
tional 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
Typ
Units
C
IN
Input Capacitance
V
IN
= 0V
3.0
C
OFF
A/B Capacitance, Switch OFF
V
IN
= 0V
8.5
pF
C
ON
A/B Capacitance, Switch ON
V
IN
= 5V
17.0
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 = 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.)
PI3B16210/162210
3.3V, Hot Insertion, 20-Bit, 2-Port BusSwitch
3
PS8193B 11/09/98
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Com.
Parameters
Description
Conditions
(1)
Min
Max
Units
tPLH
Propagation Delay
(2,3)
C
L
= 50pF 16210
0.25
tPHL
Ax to Bx, Bx to Ax
R
L
= 500
162210
1.25
tPZH
Bus Enable Time
1
4.5
ns
tPZL
BE to Ax or Bx
tPHZ
Bus Disable Time
1
5.0
t
PLZ
BE 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
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
10
A
Supply Current
I
CC
Supply Current per
V
CC
= Max.
V
IN
= 3.0V
(3)
750
A
Input @ TTL HIGH
I
CCD
Supply Current per
V
CC
= Max.
0.25
mA/
Input per MHz
(4)
A and B Pins Open
MHz
BE = GND
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 = 3.3V, +25C ambient.
3. Per TTL driven input (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.
Switching Characteristics over Operating Range
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 0.25ns 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.
C
L
= 50pF,
R
L
= 500
,
R =
500
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