PERICOM PI3C3245L

PI3C3245
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2.5V/3.3V, High Bandwidth, Hot Insertion
8-Bit, 2-Port, Bus Switch
Product Features
Product Description
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Pericom Semiconductor’s PI3C series of logic circuits are produced
using the Company’s advanced submicron CMOS technology,
achieving industry leading performance.
Near zero propagation delay
5Ω switches connect inputs to outputs
High Bandwidth Operation (>400 MHz)
Permits Hot Insertion
5V I/O Tolerant
Rail-to-Rail 3.3V or 2.5V Switching
2.5V Supply Voltage Operation
Packages available:
– 20-pin 150 mil wide plastic QSOP (Q)
The PI3C3245 is a 2.5V or 3.3V 8-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).
– 20-pin 173 mil wide plastic TSSOP (L)
Product Pin Configuration
Logic Block Diagram
A0
B0
A7
B7
BE
NC
1
20
VCC
A0
2
19
BE
A1
3
18
B0
A2
4
17
B1
A3
5 20-Pin 16
B2
A4
6
L,Q
15
B3
A5
7
14
B4
A6
8
13
B5
A7
9
12
B6
10
11
B7
GND
Truth Table(1)
Function
Disconnect
Connect
Product Pin Description
BE
H
L
A0–7
Hi-Z
B0–7
Pin Name
BE
A0–7
B0–7
GND
VCC
Note:
1. H
= High Voltage Level
L
= Low Voltage Level
Hi-Z = High Impedance
1
Description
Bus Enable Input (Active LOW)
Bus A
Bus B
Ground
Power
PS8162B
12/10/99
PI3C3245
2.5V/3.3V, High Bandwidth,
Hot Insertion, 8-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
(4)
0.8
Units
–0.73
VCC = Min., VIN = 0.0V, ION = 48mA
VCC = Min., VIN = 2.4V, ION = 15mA
–1.2
V
5
8
7
15
Ω
Capacitance (TA = 25°C, f = 1 MHz)
Parameters(5)
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. 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.
5. This parameter is determined by device characterization but is not production tested.
2
PS8162B
12/10/99
PI3C3245
2.5V/3.3V, High Bandwidth,
Hot Insertion, 8-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.
260
500
Units
µA
750
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
Conditions(1)
Parameters Description
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
Delay(2,3)
Propagation
Ax to Bx
Bus Enable Time
BE to Ax or Bx
Bus Disable Time
BE to Ax or Bx
PI3C3245
Com.
Min.
Max.
CL = 50pF,
RL = 500Ω
CL = 50pF,
RL = 500Ω,
R = 500Ω
Units
0.25
1.5
6.5
1.5
5.5
ns
Switching Characteristics over 2.5V Operating Range
Parameters Description
t PLH
tPHL
t PZH
t PZL
t PHZ
tPLZ
Propagation Delay(2,3)
Ax to Bx
Bus Enable Time
BE to Ax or Bx
Bus Disable Time
BE to Ax or Bx
Conditions(1)
PI3C3245
Com.
Min.
Max.
CL = 50pF,
RL = 500Ω
CL = 50pF,
RL = 500Ω,
R = 500Ω
Units
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 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
PS8162B
12/10/99
PI3C3245
2.5V/3.3V, High Bandwidth,
Hot Insertion, 8-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
InputVoltage
Voltage over
Supply
Voltages
Output
Voltage
vs.vs.
Input
overVarious
Various
Supply
Voltages
Ordering Information
Part
Pin-Package
Te mpe rature
PI3C3245L
20- TSSOP (L)
–40ºC to +85ºC
PI3C3245Q
20- QSOP (Q )
–40ºC to +85ºC
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
4
PS8162B
12/10/99