Product Features
Near zero propagation delay
20 Ohm switches connect inputs to outputs
Fast Switching Speed - 3.8ns (max.)
Packages available:
24-pin 150 mil wide plastic QSOP (Q)
24-pin 173 mil wide plastic TSSOP (L)
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PI3B3863
3.3V, 10-Bit, 2-Port BusSwitch
with SSTL-2 Enable
Product Description
Pericoms Semiconductors PI3B series of logic circuits are
produced using the Companys advanced sub micron CMOS
technology, achieving industry leading performance.
The PI3B3863 is a 10-bit, 3.3 volt two-port bus switch designed
with a low ON resistance 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 (BE) input signal,
which is SSTL-2 compatible.
Logic Block Diagram
Product Pin Configuration
24-Pin
Q, L
Truth Table
(1)
Function
Disconnect
Connect
Note:
BE
H
L
A
0–9
Hi-Z
B
0–9
Product Pin Description
Pin Name
BE
A09
B09
GND
V
CC
V
REF
Description
Bus Enable Input (Active LOW)
Bus A
Bus B
Ground
Power
Input Reference
1. H = High Voltage Level
L = Low Voltage Level
Hi-Z = High Impedance
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PI3B3863
3.3V, 10-Bit, 2-Port BusSwitch
with SSTL-2 Enable
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 .............................. 40°C to +85°C
Supply Voltage to Ground Potential (Inputs & V
CC
Only) ........ 0.5V to +4.6V
Supply Voltage to Ground Potential (Outputs & D/O Only) ...... 0.5V to +4.6V
DC Input Voltage ....................................................................... 0.5V to +4.6V
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 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
= 0°C to +70°C, V
CC
= 3.3V ± 5%)
Parameters Description
V
IH
V
IL
V
REF
I
IH
I
IL
I
OZH
V
IK
R
ON
Input HIGH Voltage (BE)
Input LOW Voltage (BE)
Input Reference Voltage
Input HIGH Current
Input LOW Current
V
CC
= Max., V
IN
= V
CC
V
CC
= Max., V
IN
= GND
V
CC
= Min., I
IN
= –18mA
V
CC
= Min., V
IN
= 0.8V, I
ON
= 20mA
& V
IN
= 1.6V, I
ON
= 15mA
17
25
Test Conditions
(1)
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
Min.
V
REF
+0.18
-0.3
1.15
1.25
Typ.
(2)
Max.
3
Units
V
V
REF
- 0.18 V
1.35
±1
±100
±250
–1.2
36
V
µA
µA
µA
V
Ω
High Impedance Output Current 0
≤
A, B
≤V
CC
Clamp Diode Voltage
Switch On Resistance
(3)
Capacitance
(T
A
= 25°C, f = 1 MHz)
Parameters
(4)
C
IN
C
OFF
C
ON
(A/B)
Description
Input Capacitance
A Capacitance, Switch Off
A/B Capacitance, Switch On
Test Conditions
V
IN
= 0V
V
IN
= 0V
V
IN
= 0V
Typ.
4.5
3.5
9.5
Units
pF
pF
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 V
CC
= 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.
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PI3B3863
3.3V, 10-Bit, 2-Port BusSwitch
with SSTL-2 Enable
Power Supply Characteristics
Parameters Description
I
CC
∆I
CC
Quiescent Power
Supply Current
Supply Current per
Input @ TTL HIGH
Test Conditions
(1)
V
CC
= Max.
V
CC
= Max.
V
IN
= GND or V
CC
V
IN
= 3.0V
(3)
Min.
Typ.
(2)
1.8
1.9
Max.
2.5
2.5
Units
mA
mA
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.
2. Typical values are at V
CC
= 3.3V, +25°C ambient.
3. Per TTL driven input (control input only); A and B pins do not contribute to I
CC
.
Switching Characteristics over Operating Range
PI3B3863
Parame te rs
De s cription
Conditions
(2,3)
Com.
M in.
t
PLH
t
PHL
t
PZH
t
PZL
Propagation Delay
(2,3)
Ax to Bx, Bx to Ax
Bus Enable Time
BE to Ax or Bx
C
L
= 50pF, R
L
= 500
Ω
C
L
= 20pF, R
L
= 500
Ω,
R = 500
Ω,
C
L
= 50pF, R
L
= 500
Ω,
R = 500
Ω,
C
L
= 20pF, R
L
= 500
Ω,
R = 500
Ω,
C
L
= 50pF, R
L
= 500
Ω,
R = 500
Ω,
M ax.
1
1
1
1
1
3
3.5
3.2
3.8
ns
Units
t
PHZ
t
PLZ
Bus Disable Time
BE to Ax or Bx
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.
Ordering Information
Part
PI3B3863Q
PI3B3863L
Pin-Package
24 - QSOP(Q )
24 - TSSOP(L)
Te mpe rature
40°C to +85°C
40°C to +85°C
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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