Pericom Semiconductor’s PI3C34X245 is a 2.5V or 3.3V, 32-bit,
2-port bus switch designed with a low On-Resistance (5-ohms)
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 En-
able (BE) input signal. It is very useful in switching signals that
have high bandwidth (>400 MHz).
à
80-pin 150-mil wide plastic BQSOP (B)
Block Diagram
A0
B0
Pin Configuration
NC
A0
A1
A2
A3
A4
A5
A6
A7
GND
NC
A8
A9
A10
A11
A12
A13
A14
A15
GND
NC
A16
A17
A18
A19
A20
A21
A22
A23
GND
NC
A24
A25
A26
A27
A28
A29
A30
A31
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
A7
BE1
A8
A15
BE2
A16
A23
BE3
A24
A31
BE4
B7
B8
B15
B16
B23
B24
B31
Pin Description
Pin Name
BEn
A0 – A31
B0 – B31
Description
Bus Enable Input (Active LOW)
Bus A
Bus B
V
CC
BE1
B0
B1
B2
B3
B4
B5
B6
B7
V
CC
BE2
B8
B9
B10
B11
B12
B13
B14
B15
V
CC
BE3
B16
B17
B18
B19
B20
B21
B22
B23
V
CC
BE4
B24
B25
B26
B27
B28
B29
B30
B31
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13-0159
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PS8429F
10/23/13
2.5V/3.3V, High Bandwidth, Hot Insertion,
32-Bit, 2-Port Bus Switch
Absolute Maximum Ratings
Parameter
Storage Temperature
Ambient Temperature with Power Applied
Supply Voltage to Ground Potential
DC Input Voltage
DC Output Current
Power Dissipation
Stress beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.
PI3C34X245
Min.
-65
-40
-0.5
-0.5
-
-
Max.
150
85
4.6
5.5
120
0.5
Units
o
o
C
C
V
V
mA
W
DC Electrical Characteristics
(Over the 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
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
V
CC
= Min., I
IN
= –18 mA
V
CC
= Min., V
IN
= 0.0V, 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
V
μA
V
Ω
High Impedance Output Current 0 ≤ A, B ≤ V
CC
-0.73
5
8
-1.2
7
15
Capacitance
(T
A
= 25°C, f = 1 MHz)
Parameters
(4)
C
IN
C
OFF
C
ON
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.
Description
Input Capacitance
A/B Capacitance, Switch Off
A/B Capacitance, Switch On
Test Conditions
V
IN
= 0V
Typ
3.5
5.0
10.0
Units
pF
pF
pF
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13-0159
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PS8429F
10/23/13
2.5V/3.3V, High Bandwidth, Hot Insertion,
32-Bit, 2-Port Bus Switch
Power Supply Characteristics
Parameters
I
CC
ΔI
CC
PI3C34X245
Description
Quiescent Power Supply
Current
Supply Current per
Input HIGH
V
CC
= Max.
Test Conditions
(1)
V
IN
= GND or V
CC
V
IN
= 3.0V
(3)
Min
Typ
(2)
1.0
Max
2.0
Units
mA
2.5
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 driven input (control input only); A and B pins do not contribute to ΔICC.
Switching Characteristics over 3.3V Operating Range
Com.
Parameters
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Description
Propagation Delay
(2,3)
Ax to Bx
Bus Enable Time
BE to Ax or Bx
Bus Disable Time
BE to Ax or Bx
Test Conditions
(1)
C
L
= 50 pF
R
L
= 500Ω
C
L
= 50 pF
R
L
= 500Ω
R = 500Ω
Min
Max
0.25
Units
1.5
1.5
6.5
5.5
ns
Switching Characteristics over 2.5V Operating Range
Com.
Parameters
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Description
Propagation Delay
(2,3)
Ax to Bx
Bus Enable Time
BE to Ax or Bx
Bus Disable Time
BE to Ax or Bx
Test Conditions
(1)
C
L
= 50 pF
R
L
= 500Ω
C
L
= 50 pF
R
L
= 500Ω
R = 500Ω
Min
Max
0.25
Units
1.5
1.5
9.8
8.3
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 ca-
pacitance. The time constant for the switch alone is of the order of 0.25 ns for 50 pF 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.
All trademarks are property of their respective owners.
13-0159
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PS8429F
10/23/13
2.5V/3.3V, High Bandwidth, Hot Insertion,
32-Bit, 2-Port Bus Switch
PI3C34X245
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
All trademarks are property of their respective owners.
13-0159
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PS8429F
10/23/13
2.5V/3.3V, High Bandwidth, Hot Insertion,
32-Bit, 2-Port Bus Switch
Packaging Mechanical: 80-pin BQSOP (B)
DOCUMENT CONTROL NO.
PD - 1211
REVISION: D
DATE: 03/09/05
PI3C34X245
80
41
.150
.157
3.80
4.00
.228
.244
5.80
6.20
.008 NOM
0.203
5˚
Gauge Plane
1
0.803
0.811
20.40
20.60
1
40
.019 0.50
.029 0.75
.010
.016
.063
1.60
Nom
.078
2.0
Max
.010
0.254
BSC
0.50
.019
REF
0.254
x 45˚
0.406
.0197
BSC
0.50
.007
.010
0.17
0.27
5˚
.002
.009
0.05
0.25
Pericom Semiconductor Corporation
3545 N. 1st Street, San Jose, CA 95134
1-800-435-2335
• www.pericom.com
DESCRIPTION: 80-Pin, 150-Mil Wide BQSOP
PACKAGE CODE: B
X.XX
X.XX
DENOTES DIMENSIONS
IN MILLIMETERS
Note:
1. Controlling dimensions in millimeters.
3. Package Outline Exclusive of Mold Flash and Metal Burr
3. Ref: JEDEC MO-154C/BC
Ordering Information
Ordering Code
PI3C34X245BE
2. "E" denotes Pb-free and Green
3. Adding an "X" at the end of the ordering code denotes tape and reel packaging
Package Code
B
Package Type
Pb-free & Green, 80-pin BQSOP
1. Thermal characteristics can be found on the company web site at : http://www.pericom.com/support/packaging/packaging-mechanicals-and-thermal-characteristics/
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