Block Diagram
A0
B0
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3C3384
PI3C32384 (25Ω)
Ω
2.5V/3.3V, High Bandwidth, Hot Insertion
10-Bit, 2-Port, Bus Switch
Features
•
•
•
•
•
•
•
•
•
Near-Zero propagation delay
Low noise, 25-ohm version (PI3C32384)
5-ohm switches connect inputs to outputs (PI3C3384)
High Bandwidth (>400 MHz)
Permits Hot Insertion.
Rail-to-Rail, 3.3V or 2.5V Switching
5V I/O Tolerant
2.5V Supply Voltage Operation
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 PI3C3384 and PI3C32384 are 2.5V or 3.3Volt,
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.
The PI3C32384 is designed with an internal 25-ohm resistor reducing
noise reflection in high-speed applications.
Applications
• High Bandwidth Data switching
• Hot Docking
Pin Configuration
BE
A
B
0
A
0
A
1
B
1
B
2
A
2
A
3
B
3
B
4
A
4
GND
24
1
23
2
22
3
21
4
5
24-Pin
20
6
L,Q
19
18
7
17
8
16
9
15
10
14
11
13
12
V
CC
B
9
A
9
A
8
B
8
B
7
A
7
A
6
B
6
B
5
A
5
BE
B
A4
B4
A5
B5
A9
B9
BE
A
BE
B
Truth Table
(1)
Function
Disconnect
Connect
Connect
Connect
BE
A
H
L
H
L
BE
B
H
H
L
L
B
0-B4
Hi-Z
A
0-A4
Hi-Z
A
0-A4
B
5-B9
Hi-Z
Hi-Z
A
5-A9
A
5-A9
Pin Description
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
Note:
1. H = High Voltage Level, X = Don’t Care,
L = Low Voltage Level, Hi-Z = High Impedance
1
PS8757E
12/01/05
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3C3384/PI3C32384 (25-ohm)
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 & 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 .............................................................................. 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 Operating Range, T
A
= –40°C to +85°C, V
CC
= 3.3V ± 10%)
Parame te rs
V
IH
V
IL
I
IH
I
IL
I
OZH
V
IK
De s cription
Input HIGH Voltage
Input LOW Voltage
Input HIGH Current
Input LOW Current
Te s t Conditions
(1)
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
V
CC
= Max., VIN = V
CC
V
CC
= Max., VIN
=
GN D
M in.
2.0
–0.5
Typ.
(2)
M ax.
Units
V
0.8
±1
±1
±1
–0.73
–1.2
7
40
15
48
μ
A
High- Impedence Output Current 0
≤
A, B
≤
V
CC
Clamp diode Voltage
V
CC
= Min., I
IN
= –18mA
V
CC
= Min.,V
IN
= 0.0V
I
ON
= 48mA or 64mA
V
CC
= Min.,V
IN
= 2.4V
I
ON
= 15mA
PI3C3384
PI3C32384
PI3C3384
PI3C32384
18
18
V
5
28
8
35
R
ON
Switch On Resistance
(3)
Ω
Capacitance
(T
A
= 25°C f = 1 MHz)
Parame te rs
(4)
C
IN
C
O FF
C
ON
De s cription
Input Capacitance
A/B Capacitance, Switch Off
A/B Capacitance, Switch On
V
IN
= 0V
Te s t Conditions
Typ.
3.5
5.0
10.0
pF
Units
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.
2
PS8757E
12/01/05
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3C3384/PI3C32384 (25-ohm)
2.5V/3.3V, High Bandwidth,
Hot Insertion, 10-Bit, 2-Port Bus Switch
Power Supply Characteristics
Parame te rs
I
CC
ΔI
CC
De s cription
Quiescent Power Supply Current
Supply Current per Input
@ TTL HIGH
Te s t Conditions
(1)
V
CC
= Max.,
PI3C3384
V
IN
= GND or V
CC
PI3C32384
V
CC
= Max.,
V
IN =
3.0V
(3)
M in.
Typ.
(2)
260
M ax.
500
μ
A
750
Units
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 inputs only); A and B pins do not contribute to I
CC
.
Switching Characteristics over 3.3V Operating Range
PI3C3384
Parame te rs
De s cription
Conditions
(1)
M in.
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
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
C
L
= 50pF
R
L
= 500- ohm
C
L
= 50pF
R
L
= 500- ohm
R = 500- ohm
1.5
1.5
Com.
M a x.
0.25
6.5
5.5
1.5
1.5
M in.
PI3C32384
Com.
M a x.
1.25
6.5
5.5
ns
Units
Switching Characteristics over 2.5V Operating Range
PI3C3384
Parame te rs
De s cription
Conditions
(1)
M in.
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
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
C
L
= 50pF
R
L
= 500- ohm
C
L
= 50pF
R
L
= 500- ohm
R = 500- ohm
1.5
1.5
Com.
M a x.
0.25
9.8
8.3
1.5
1.5
M in.
PI3C32384
Com.
M a x.
1.25
9.8
8.3
ns
Units
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.
3
PS8757E
12/01/05
VOUT, (V)
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3C3384/PI3C32384 (25-ohm)
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
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
6V
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
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
3V
Output
Normally
Low
t
PZH
Output
Normally
High
Switch
GND
1.5V
0V
Switch
1.5V
0.3V
Propagation Delay
3V
1.5V
0V
Same Phase
Input Transisiton
t
PLH
Output
3V
1.5V
t
PHL
V
OH
1.5V
V
OL
0.3V
Disable
1.5V
t
PLZ
1.5V
0V
3V
V
OL
V
OH
0V
1.5V
t
PZH
t
PLH
Opposite Phase
Input Transisiton
t
PHL
3V
1.5V
0V
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
4
PS8757E
12/01/05
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3C3384/PI3C32384 (25-ohm)
2.5V/3.3V, High Bandwidth,
Hot Insertion, 10-Bit, 2-Port Bus Switch
Packaging Mechanical: 24-pin QSOP (Q)
48
.150
.157
3.80
4.00
.228
.244
5.80
6.20
Gauge Plane
.010 0.25
BSC
.386
.394
9.80
10.00
.020
.029
0.50
0.75
1
.015 0.381 x 45˚
.008 0.20
Nom
Nom
.063 1.60
.079
2.0
Max
.002 0.05
.009 0.25
.014 0.356
REF
5˚
.0157 BSC
0.40
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
.0051
.009
0.13
0.23
PackagingMechanical: 24-pin TSSOP (L)
48
.150
.157
3.80
4.00
.228
.244
5.80
6.20
Gauge Plane
.010 0.25
BSC
.386
.394
9.80
10.00
.020
.029
0.50
0.75
1
.015 0.381 x 45˚
.008 0.20
Nom
Nom
.063 1.60
.079
2.0
Max
.002 0.05
.009 0.25
.014 0.356
REF
5˚
.0157 BSC
0.40
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
.0051
.009
0.13
0.23
5
PS8757E
12/01/05
京公网安备 11010802033920号
EEWORLD
