PI3C3861-A
2.5V/3.3V, High Bandwidth, Hot-Insertion,
10-Bit, 2-Port, Bus Switch
Features
•
•
•
•
•
•
•
•
Near-Zero propagation delay
5-ohm switches connect inputs to outputs
High bandwidth (>400 MHz)
Rail-to-rail 2.5V or 3.3V switching
5V I/O Tolerant
2.5V Supply Voltage Operation
Permits Hot-Insertion
Packaging (Pb-free & Green Available):
– 24-pin 150-mil wide plastic QSOP (Q)
– 24-pin 173-mil wide plastic TSSOP (L)
Description
Pericom Semiconductor's PI3C series of logic circuits are produced
using the company's advance submicron CMOS technology,
achieving industry leading performance.
The PI3C3861-A is a 10-bit, 2.5volt or 3.3 volt, 2-port bus switch
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 (BE) input signal. This device
is very userful in switching signals that have high bandwidth
(>400 MHz).
Applications
• High bandwidth data switching
• Hot Docking
Block Diagram
A
0
B
0
Pin Configuration
NC
A
0
A
1
A
2
A
3
A
4
A
5
A
6
A
7
A
8
A
9
GND
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
V
CC
B
E
B
0
B
1
B
2
B
3
B
4
B
5
B
6
B
7
B
8
B
9
A
9
B
9
BE
Truth Table
(1)
Function
Disconnect
Connect
BE
H
L
A0–9
Hi-Z
B
0–9
Pin Description
Pin Name
BE
A
0–9
B
0–9
GND
V
CC
Description
Bus Enable Input (Active LOW)
Bus A
Bus B
Ground
Power
Note:
1.
H = High Voltage Level, L = Low Voltage Level
Hi-Z = High Impedance
06-0311
1
PS8880A
12/15/06
PI3C3861-A
2.5V/3.3V, High-Bandwidth,
Hot-Insertion, 10 -Bit, 2-Port, Bus Switch
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 & Vcc 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 +5.5V
DC Output Current............................................................................ 120mA
Power Dissipation ................................................................................ 0.5W
Note:
Stresses greater than those listed under MAX I 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 sec tions of this
specification is not implied. Exposure to absolute maximum rat-
ing conditions for extended periods may affect reliability.
DC Electrical Characteristics
(Over Operating Range, T
A
= –40°C to +85°C, V
CC
= 3.3V ±10%)
Parameters
V
IH
V
IL
I
IH
I
IL
I
OZH
V
IK
R
ON
Description
Input HIGH Voltage
Input LOW Voltage
Input HIGH Current
Input LOW Current
High Impedance Output 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
V
CC
= Max., V
IN
= GND
0
≤
A, B
≤
V
CC
V
CC
= Min., I
IN
= –18mA
V
CC
= Min., V
IN
= 0V, I
ON
= 48mA
V
CC
= Min., V
IN
= 2.4V,
I
ON
= 15mA
Min.
2.0
–0.5
Typ
(2)
Max.
0.8
±1
±1
±1
Units
V
μA
V
Ω
–0.73
5
8
–1.2
7
15
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.
Capacitance
(T
A
= 25°C, f = 1 MHz)
Parameters
(1)
C
IN
C
OFF
C
ON
Input Capacitance
A/B Capacitance, Switch Off
A/B Capacitance, Switch On
V
IN
= 0V
Description
Test Conditions
Typ.
6.0
5.0
10.0
pF
Units
Notes:
1.
This parameter is determined by device characterization but is not production tested.
06-0311
2
PS8880A
12/15/06
PI3C3861-A
2.5V/3.3V, High-Bandwidth,
Hot-Insertion, 10 -Bit, 2-Port, Bus Switch
Power Supply Characteristics
Parameters
(4)
I
CC
Description
Quiescent Power
Supply Current
Test Conditions
(1)
V
CC
= Max.
V
IN
= GND or V
CC
Min.
Typ.
(2)
650
Max.
1000
Units
μA
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
.
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 3.3V Operating Range
Parameters
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Description
Propagation Delay
(1,2)
Ax to Bx, Bx to Ax
Bus Enable Time
BE to Ax or Bx
Bus Disable Time
BE to Ax or Bx
C
L
= 50pF
R
L
= 500-ohm
1.5
1.5
Test Conditions
Com.
Min.
Max.
0.25
6.5
5.5
ns
Units
Notes:
1.
This parameter is guaranteed but not tested on Propagation Delays.
2.
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.
Switching Characteristics over 2.5V Operating Range
Parameters
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Description
Propagation Delay
(1,2)
Ax to Bx, Bx to Ax
Bus Enable Time
BE to Ax or Bx
Bus Disable Time
BE to Ax or Bx
C
L
= 50pF
R
L
= 500-ohm
1.5
1.5
Test Conditions
Com.
Min.
Max.
0.25
9.8
8.3
ns
Units
Notes:
1.
This parameter is guaranteed but not tested on Propagation Delays.
2.
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.
06-0311
3
PS8880A
12/15/06
PI3C3861-A
2.5V/3.3V, High-Bandwidth,
Hot-Insertion, 10 -Bit, 2-Port, Bus Switch
4.0
VCC = 3.3V
3.1V
2.9V
2.7V
2.5V
2.3V
3.8V
3.6V
3.4V
3.2V
3.0V
2.8V
V OUT , (V)
2.0
0.0
0.0
1.0
2.0
V IN , (V)
3.0
4.0
5.0
Output Voltage vs. Input Voltage over Various Supply Voltages
Packaging Mechanical: 24-pin TSSOP (L)
24
.169
.177
4.3
4.5
.0075
.0098
0.19
0.25
1
.303
.311
7.7
7.9
.047
Max
1.20
0.45
0.75
.252
BSC
6.4
SEATING
PLANE
.018
.030
.0255
BSC
0.65
.007
.012
0.19
0.30
.002 0.05
.006 0.15
06-0311
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PS8880A
12/15/06
PI3C3861-A
2.5V/3.3V, High-Bandwidth,
Hot-Insertion, 10 -Bit, 2-Port, Bus Switch
Packaging Mechanical: 24-pin QSOP (Q)
24
.008
0.20
MIN.
.008
.013
0.20
0.33
Guage Plane
.150
.157
3.81
3.99
.010
0.254
1
.337
.344
8.56
8.74
Detail A
.016
.035
0.41
0.89
.041
1.04
REF
0˚-6˚
.033
0.84
.053
.069
1.35
1.75
.015 x 45˚
0.38
Detail A
.007
.010
SEATING
PLANE
.004 0.101
.010 0.254
.016
.050
0.406
1.27
.228
.244
5.79
6.20
0.178
0.254
.025
typical
0.635
.008 0.203
.012 0.305
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
Ordering Information
Ordering Code
PI3C3861-ALE
PI3C3861-AQE
Package Code
L
Q
Package Description
Pb-free & Green, 24-pin TSSOP
Pb-free & Green, 24-pin QSOP
Notes:
•
Thermal characteristics can be found on the company web site at www.pericom.com/packaging/
•
E = Pb-free & Green
• Adding an
X suffix = Tape/Reel
Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com
06-0311
5
PS8880A
12/15/06
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