Pericom Semiconductor’s PI3C3384 is a 2.5V or 3.3V, high
bandwidth 10-bit, 2-port bus switches 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. Two bus enable signals are
provided, one for each of the upper and lower five bits of the
two 10-bit buses.
Applications
• High Bandwidth Data switching
• Hot Docking
Block Diagram
A0
B0
Pin Configuration
A4
B4
A5
B5
A9
BE
A
BE
B
B9
BE
A
B
0
A
0
A
1
B
1
B
2
A
2
A
3
B
3
B
4
A
4
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
9
A
9
A
8
B
8
B
7
A
7
A
6
B
6
B
5
A
5
BE
B
Truth Table
(1)
Function
BE
A
Disconnect H
Connect
L
Connect
H
Connect
L
Note:
1. High Voltage Level, X = Don't Care,
L =- Low Voltage Level, Hi-Z = High Impedance
11-0008
BE
B
H
H
L
L
B0-B4
Hi-Z
A0-A4
Hi-Z
A0-A4
B5-B9
Hi-Z
Hi-Z
A5-A9
A5-A9
Pin Description
Pin Name
BE
A
, BE
B
A0 - A9
B0 - B9
GND
V
CC
Description
Bus Enable Inputs (Active LOW)
Bus A
Bus B
Ground
Power
1
PS8757G
11/25/10
PI3C3384
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 (Input & 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 +5.5V
DC Output Current ..................................................................................... 120mA
.
Power Dissipation .......................................................................................... 1.0W
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 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)
Min
2.0
–0.5
Typ.
(2)
Max
0.8
±1
±1
±1
–1.2
7
15
Units
V
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
= 0.0V
I
ON
= 48mA or 64mA
V
CC
= Min, V
IN
= 0.0V
I
ON
= 48mA or 64mA
µA
V
Ω
–0.73
5
8
Capacitance
(T
A
= 25°C, f = 1 MHz)
Parameters
(4)
Description
CIN
Input Capacitance
COFF
A/B Capacitance, Switch Off
CON
A/B Capacitance, Switch On
Test Conditions
V
IN
= 0V
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, TA = 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 volt-
ages on the two (A,B) pins.
4. This parameter is determined by device characterization but is not production tested.
Typ.
3.5
5.0
10.0
Units
pF
11-0008
2
PS8757G
11/25/10
PI3C3384
2.5V/3.3V, High Bandwidth, Hot Insertion
10-Bit, 2-Port, Bus Switch
Power Supply Characteristics
Parameters
Description
ICC
Quiescent Power Supply
Current
DICC
Supply Current per Input @
TTL HIGH
Test Conditions
(1)
V
CC
= Max,
V
IN
= GND or V
CC
V
CC
= Max,
V
IN
= 3.0V
(3)
Typ.
(2)
260
Min.
Max.
500
750
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 VCC = 3.3V, +25°C ambient.
3. Per TTL driven input (control inputs only); A and B pins do not contribute to ICC.
Switching Characteristics over 3.3V Operating Range
Parameters
Description
Conditions
(1)
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
Propogation Delay
(2,3)
Ax to Bx, Bx to Ax
Bus Enable Time
BEx to Ax or Bx
Bus Disable Time
BEx to Ax or Bx
Min
C
L
= 50pF
R
L
= 500-ohm
C
L
= 50pF
R
L
= 500-ohm
R = 500-ohm
Com.
Max
0.25
6.5
5.5
Units
1.5
1.5
ns
Switching Characteristics over 2.5V Operating Range
Parameters
Description
Conditions
(1)
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
Propogation Delay
(2,3)
Ax to Bx, Bx to Ax
Bus Enable Time
BEx to Ax or Bx
Bus Disable Time
BEx to Ax or Bx
Min
C
L
= 50pF
R
L
= 500-ohm
C
L
= 50pF
R
L
= 500-ohm
R = 500-ohm
Com.
Max
0.25
9.8
8.3
Units
1.5
1.5
ns
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 driv-
ing 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.
11-0008
3
PS8757G
11/25/10
PI3C3384
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
VOUT, (V)
2.0
0.0
0.0
1.0
2.0
VIN, (V)
3.0
4.0
5.0
Output Voltage vs. Input Voltage over Various Supply Voltages
Test Circuit
V
CC
6V
Open
500Ω
Pulse
Generator
V
IN
D.U.T.
50pF
R
T
C
L
500Ω
V
OUT
Switch Position
Test
Disable LOW
Enable LOW
Disable HIGH
Enable HIGH
t
PD
Switch
6V
6V
GND
GND
Open
Definitions:
C
L
= Load capacitance (includes jig and
probe capacitance)
R
T
= Termination resistance (should be
equal to Z
OUT
of the pulse generator)
Enable and Disable Timing
Enable
Control
Input
t
PZL
Output
Normally
Low
t
PZH
Output
Normally
High
1.6V
t
PLZ
Disable
Propagation Delay
3V
1.5V
0V
Same Phase
Input Transisiton
t
PLH
Output
3V
1.5V
t
PHL
V
OH
1.5V
V
OL
t
PHL
1.5V
0V
Switch
3V
1.5V
t
PZH
0.3V
3V
VOL
VOH
0V
1.5V
Switch
GND
1.5V
0V
0.3V
t
PLH
Opposite Phase
Input Transisiton
3V
1.5V
0V
1. Input Control Enable = Low Input Control Device = High
2. Pulse Generator total pulses
Rate ≤1.0 MHz; Z
OUT
≤50-Ohms;
tF, tR
≤2.5ns
11-0008
4
PS8757G
11/25/10
PI3C3384
2.5V/3.3V, High Bandwidth, Hot Insertion
10-Bit, 2-Port, Bus Switch
DOCUMENT CONTROL NO.
PD - 1203
24
.008
0.20
MIN.
.008
.013
0.20
0.33
REVISION: H
DATE: 10/22/07
.150
.157
3.81
3.99
Guage Plane
.010
0.254
1
Detail A
.016
.035
0.41
0.89
.041
1.04
REF
0˚-6˚
.337
.344
8.56
8.74
.015 x 45˚
0.38
.033
0.84
1
.053
.069
1.35
1.75
Detail A
SEATING
PLANE
.025
typical
0.635
.004
0.101
.010
0.254
.228
.244
5.79
6.20
.007
.010
0.178
0.254
.008
0.203
.012
0.305
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
Pericom Semiconductor Corporation
3545 N. 1st Street, San Jose, CA 95134
1-800-435-2335
• www.pericom.com
Note:
1) Controlling dimensions in millimeters
2) Ref:
JEDEC MO-137B/AE
3) Dimensions do not include mold flash, protrusions or gate burrs
07-0475
DESCRIPTION:
24-Pin, 150-Mil
Wide, QSOP
PACKAGE CODE: Q
Ordering Information
Ordering Code
PI3C3384QE
Notes:
Package Code
Q
Package Description
Pb-Free & Green, 24-pin QSOP
1.
Thermal characteristics can be found on the company web site at www.pericom.com/packaging/
