PERICOM PI3C34X245

PI3C34X245
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2.5V/3.3V, High Bandwidth, Hot Insertion
32-Bit, 2-Port, Bus Switch
Product Features
Product Description
• Near zero propagation delay
Pericom Semiconductor’s PI3C series of logic circuits are produced
using the Company’s advanced submicron CMOS technology,
achieving industry leading performance.
• 5Ω switches connect inputs to outputs
• 2.5V Supply Voltage Operation
The PI3C34X245 is a 2.5V or 3.3V, 32-bit, 2-port bus switch designed
with a low ON resistance (5Ω) 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. It is very useful in switching
signals that have high bandwidth (>400 MHz).
• Permits Hot Insertion
• 5V I/O Tolerant
• High Bandwidth Operation (>400 MHz)
• Packages available:
– 80-pin 150 mil wide plastic BQSOP (B)
Product Pin Configuration
Logic Block Diagram
A0
A7
B0
NC
A0
A1
A2
A3
B7
A4
A5
A6
A7
GND
BE1
NC
A8
A9
A8
B8
A10
A11
A12
A15
A13
A14
A15
B15
GND
NC
A16
A17
A18
A19
BE2
A16
A20
B16
A21
A22
A23
A23
GND
NC
A24
B23
A25
A26
A27
A28
A29
BE3
A24
B24
A31
B31
A30
A31
GND
80
79
78
77
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
76
75
74
73
72
71
70
69
68
67
66
80-Pin 65
B 64
63
62
61
VCC
BE1
B0
B1
B2
B3
B4
B5
B6
B7
VCC
BE2
B8
B9
B10
B11
B12
B13
B14
B15
21
60
VCC
22
23
24
25
26
27
28
29
30
31
32
59
58
57
56
55
BE3
B16
B17
33
34
35
36
37
38
39
40
54
53
52
51
50
49
48
47
46
45
44
43
B18
B19
B20
B21
B22
B23
VCC
BE4
B24
B25
B26
B27
B28
B29
42
B30
41
B31
Product Pin Description
Pin Name
BEn
A0 – A31
B0 – B31
BE4
1
Description
Bus Enable Input (Active LOW)
Bus A
Bus B
PS8429B
12/10/99
PI3C34X245
2.5V/3.3V, High Bandwidth,
Hot Insertion, 32-Bit, 2-Port, Bus Switch
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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 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, TA = –40°C to +85°C, VCC = 3.3V ±10%)
Test Conditions(1)
Parameters Description
Min.
Typ.(2)
Max.
VIH
Input HIGH Voltage
Guaranteed Logic HIGH Level
2.0
VIL
Input LOW Voltage
Guaranteed Logic LOW Level
–0.5
IIH
Input HIGH Current
VCC = Max., VIN = VCC
±1
IIL
Input LOW Current
VCC = Max., VIN = GND
±1
IOZH
High Impedance Output Current 0 ≤ A, B ≤ VCC
VIK
Clamp Diode Voltage
RON
Switch On Resistance
V
µA
±1
VCC = Min., IIN = –18mA
(3)
0.8
Units
VCC = Min., VIN = 0.0V, ION = 48mA
VCC = Min., VIN = 2.4V, ION = 15mA
–0.73
–1.2
V
5
8
7
15
Ω
Capacitance (TA = 25°C, f = 1 MHz)
Parameters(4)
Description
Test Conditions
Typ.
Units
CIN
COFF
Input Capacitance
A/B Capacitance, Switch Off
VIN = 0V
VIN = 0V
3.5
5.0
pF
CON
A/B Capacitance, Switch On
VIN = 0V
10.0
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 voltages on the two (A,B) pins.
4. This parameter is determined by device characterization but is not production tested.
2
PS8429B
12/10/99
PI3C34X245
2.5V/3.3V, High Bandwidth,
Hot Insertion, 32-Bit, 2-Port, Bus Switch
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Power Supply Characteristics
Test Conditions(1)
Parameters Description
Min.
ICC
Quiescent Power
Supply Current
VCC = Max.
VIN = GND or VCC
∆ICC
Supply Current per
Input HIGH
VCC = Max.
VIN = 3.0V(3)
Typ.(2) Max.
1.0
Units
2.0
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 VCC = 3.3V, +25°C ambient.
3. Per driven input (control input only); A and B pins do not contribute to ∆ICC.
Switching Characteristics over 3.3V Operating Range
P13C34X245
Parame te rs
De s cription
Conditions
M in.
tPLH
tPHL
Propagation Delay (2,3)
Ax to Bx
tPZH
tPZL
Bus Enable Time
BE to Ax or Bx
tPHZ
tPLZ
Bus Disable Time
BE to Ax or Bx
M ax.
CL = 50pF
RL = 500Ω
CL = 50pF
RL = 500Ω
R = 500Ω
Units
Com.
0.25
1.5
6.5
1.5
5.5
ns
Switching Characteristics over 2.5V Operating Range
P13C34X245
Parame te rs
De s cription
Conditions
M in.
tPLH
tPHL
Propagation Delay
Ax to Bx
tPZH
tPZL
Bus Enable Time
BE to Ax or Bx
tPHZ
tPLZ
Bus Disable Time
BE to Ax or Bx
(2,3)
M ax.
CL = 50pF
RL = 500Ω
CL = 50pF
RL = 500Ω
R = 500Ω
Units
Com.
0.25
1.5
9.8
1.5
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 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 timesof 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
PS8429B
12/10/99
PI3C34X245
2.5V/3.3V, High Bandwidth,
Hot Insertion, 32-Bit, 2-Port, Bus Switch
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4.0
VCC = 3.3V
3.1V
2.9V
2.7V
2.5V
VOUT, (V)
2.3V
3.8V
3.6V
3.4V
3.2V
3.0V
2.8V
2.0
0.0
0.0
1.0
3.0
2.0
4.0
5.0
VIN, (V)
Output Voltage vs. Input Voltage over Various Supply Voltages
Ordering Information
Part
Pin - Package
D ime ns ions
PI3C34X245B
80 - BQ SO P (B)
–40°C to +85°C
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
4
PS8429B
12/10/99