PI5C3384
PI5C3384C
10-Bit, 2-Port Bus Switch
Features:
•
•
•
•
Near-Zero propagation delay
5Ω switches connect inputs to outputs
Direct bus connection when switches are ON
Ultra-low quiescent power (0.2μA typical)
– Ideally suited for notebook applications
• Packaging (Pb-free & Green Available):
– 24-pin 150-mil wide plastic QSOP (Q)
– 24-pin 300-mil wide plastic SOIC (S)
– 24-pin 173-mil wide plastic TSSOP (L)
Description:
Pericom Semiconductor’s PI5C3384 and PI5C3384C are 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 (BEx) input
signals. Two bus enable signals are provided, one for each of the
upper and lower
fi
ve bits of the two 10-bit buses.
Block Diagram
A
0
B
0
Pin Configuration
A
4
B
4
A
5
B
5
A
9
B
9
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
BE
A
BE
B
Truth Table
(1)
Function
Disconnect
Connect
Connect
Connect
Note:
1. H
X
L
Hi-Z
=
=
=
=
Pin Description
BE
A
H
L
H
L
BE
B
H
H
L
L
B
0
-B
4
Hi-Z
A
0
-A
4
Hi-Z
A
0
-A
4
B
5
-B
9
Hi-Z
Hi-Z
A
5-
A
9
A
5
-A
9
Pin Name
BE
A
, BE
B
A
0
-A
9
B
0
-A
9
GND
V
CC
Description
Bus Enable Inputs (Active LOW)
Bus A
Bus B
Ground
Power
High Voltage Level
Don’t Care
Low Voltage Level
High Impedance
1
PS7029F
05/02/07
07-0124
PI5C3384/3384C
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 & V
CC
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 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
= –40°C to +85°C, V
CC
= 5V ±5%)
Parameters
V
IH
V
IL
I
IH
I
IL
I
OZ
V
IK
I
OS
V
H
Description
Input HIGH Voltage
Input LOW Voltage
Input HIGH Current
Input LOW Current
High-Impedance Output
Current
Clamp Diode Voltage
Short Circuit Current
(3)
Input Hysteresis at Control
Pins
V
CC
= Min.
V
IN
= 0V
I
ON
= 48 mA
V
CC
= Min.
V
IN
= 2.4V
I
ON
= 15mA
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
= –18 mA
PI5C3384
PI5C3384C
100
150
5
7
Ω
10
15
Min.
2.0
–0.5
–1
–1
–1
–0.7
0.8
1
1
1
–1.2
–1.8
V
mA
mV
μA
Typ.
(2)
Max.
Units
V
A (B) = 0V, B (A) = V
CC
R
ON
Switch On-Resistance
(4)
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
= 5.0V, T
A
= 25°C 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.
07-0124
2
PS7029F
05/02/07
PI5C3384/3384C
10-Bit, 2-Port Bus switch
Capacitance
(T
A
= 25ºC, f = 1 MHz)
Parameters
(1)
C
IN
C
OFF
C
ON
Description
Input Capacitance
A/B Capacitance, Switch Off
A/B Capacitance, Switch On
V
IN
= 0V
Test Conditions
Typ.
Max.
6
6
8
pF
Units
Notes:
1. This parameter is determined by device characterization but is not production tested.
Power Supply Characteristics
Parameters
I
CC
ΔI
CC
Description
Quiescent Power
Supply Current
Supply Current per
Input @ TTL HIGH
Supply Current per
Input per MHz
(4)
Test Conditions
(1)
V
CC
= Max.,
V
IN
= GND or V
CC
V
CC
= Max.,
V
IN
= 3.4V
(3)
V
CC
= Max.,
A and B Pins Open
BE1 or BE2 = GND
Control Input Toggling
50% Duty Cycle
PI5C3384
PI5C3384C
Min.
Typ.
(2)
0.1
60
Max.
3.0
100
2.5
Units
μA
mA
I
CCD
0.25
mA/
MHz
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
= 5.0V, +25°C ambient.
3. Per TTL driven input (V
IN
= 3.4V, control inputs 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 Operating Range
Parameters
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Description
Propagation Delay
(2,3)
Ax to Bx, Bx to Ax
Bus Enable Time
BE
X
to Ax or Bx
Bus Disable Time
BEx to Ax or Bx
C
L
= 50pF
R
L
= 500Ω
1.5
1.5
Conditions
(1)
PI5C3384/3384C
Min.
Typ.
0.25
6.5
5.5
ns
Max.
Unit
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.
07-0124
3
PS7029F
05/02/07
PI5C3384/3384C
10-Bit, 2-Port Bus switch
Test Circuit
7V
V
CC
Open
500Ω
V
IN
Pulse
Generator
R
T
D.U.T.
50pF
C
L
500Ω
V
OUT
Switch Position
Test
Disable LOW
Enable LOW
t
PD
Switch
Closed
Closed
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 Diagram
Enable
Control
Input
t
PZL
3V
Output
Normally
Low
t
PZH
Output
Normally
High
Switch
GND
1.5V
0V
Switch
1.5V
0.3V
Propagation Delay Diagram
3V
Same Phase
Input Transisiton
t
PLH
Output
V
OL
t
PLH
t
PHL
3V
Opposite Phase
Input Transisiton
1.5V
0V
V
OH
0V
3V
1.5V
t
PHL
V
OH
1.5V
V
OL
1.5V
0V
Disable
1.5V
0V
t
PLZ
3V
1.5V
1.5V
t
PZH
0.3V
1. Input Control Enable = Low; Input Control Disable = High
2. Pulse Generator for all pulses:
Rate
<1.0
MHz; ZOUT <50Ω; tF, tR
<2.5ns
07-0124
4
PS7029F
05/02/07
PI5C3384/3384C
10-Bit, 2-Port Bus switch
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
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
07-0124
5
PS7029F
05/02/07
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