ETC PI5C3306CD

PI5C3306CD
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2-Bit Bus Switch with Dual Side
Undershoot Protection
Product Features
Product Description
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Pericom Semiconductor’s PI5C series of logic circuits are produced
using the Company’s advanced submicron CMOS technology,
achieving industry leading performance.
The PI5C3306CD is a 5V, 2-bit Dual Side bus switch. It is intended
for PCI Hot-Plug applications. Industry leading advantages include
a propagation delay of 250ps that result from its 5-ohm channel
resistance and low I/O capacitance. The A-ports switch data to B
outputs and are bidirectional. The PI5C3306CD device has active
LOW enables.
When the switch is disabled, the A&B ports can handle up to –2V
undershoot.
RON is 5-ohms typical
Undershoot protection up to –2V (data inputs only)
Industrial Operation Temperature: –40°C to +85°C
Near zero propagation delay
Packages available:
– 8-pin 173 mil wide plastic TSSOP (L)
– 8-pin 118 mil wide plastic MSOP (U)
Applications
• PCI Hot Plugging for live insertion
• Memory bank sharing
Product Pin Configuration
Logic Block Diagram
A1
B1
BE1
A2
BE1
A1
B1
GND
B2
BE2
1
2
3
4
8-Pin
L, U
8
7
6
5
Vcc
BE2
B2
A2
Truth Table(1)
Product Pin Description
BEn
An
Bn
Vcc
Function
Switch Enable
X*
Hi- Z
Hi- Z
GND
Disconnect
A2- A1
Bus A
H
Hi- Z
Hi- Z
VCC
Disconnect
B2- B1
Bus B
L
Bn
An
VCC
Connect
VCC
Power
GND
Ground
Pin Name
BEn
De s cription
Notes:
1. H = High Voltage Level
L = Low Voltage Level
Hi-Z = High Impedance
X = Don’t Care
*A pull-up resistor should be provided for power-up protection.
1
PS8523A
08/27/02
PI5C3306CD
2-Bit Bus Switch with Dual Side
Undershoot Protection
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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 +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 ............................................................................ 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 the Operating Range, TA = –40°C to +85°C, VCC = 4V to 5.5V)
Parame te rs
Te s t Conditions (1)
De s cription
M in.
Typ(2)
M ax.
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
±10
IIL
Input LOW Current
VCC = Max., VIN = GND
± 10
IOZH
High Impedance Output Current
0 ≤ A, B ≤ VCC
±10
VIK
Clamp Diode Voltage
VCC = Min., IIN = –2mA
–1.8
VUP
Undershoot Protection Voltage(4,5)
Max Inputs, Undershoot Pulse Duration <50ns
–2.0
RON
Switch On Resistance(3)
VCC = Min., VIN = 0.0V, ION = 48mA
VCC = 4.5V, VIN = 2.4V, ION = 15mA
VCC = Min., VIN = 2.4V, ION = 15mA
Units
V
0.8
5
10
16
µA
V
7
15
20
ohm
Capacitance (TA = 25°C, f = 1 MHz)
Parame te rs (4)
De s cription
CIN
Input Capacitance
C O FF
A/B Capacitance, Switch Off
CON
A/B Capacitance, Switch On
Te s t Conditions
Typ.
Units
1.7
VIN = 0V
2.5
pF
7.7
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 = 5.0V, 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.
5. See Parameter Measurements for description of characterization method.
2
PS8523A
08/27/02
PI5C3306CD
2-Bit Bus Switch with Dual Side
Undershoot Protection
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Power Supply Characteristics
Test Conditions(1)
Parameters Description
ICC
Quiescent Power Supply Current
∆ICC
VCC = Max.
Supply Current per Input @ TTL HIGH
VCC = Max.
Min.
Typ(2)
Max.
Units
75
µA
2.5
mA
VIN = GND or VCC
(3)
VIN = 3.4V
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.
2. Typical values are at VCC = 5.0V, +25°C ambient.
3. Per TTL driven input (VIN = 3.4V, control inputs only); A and B pins do not contribute to ICC.
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.
PI5C3306CD Switching Characteristics Over Operating Range
Com
Parame te rs
tP LH / tP HL
De s cription
(2 , 3 )
Propagation Delay
M in.
Conditions
A to B, B to A
CL = 50pF, RL = 500ohm
M a x.
Units
0.25
tP ZH / tP ZL
Bus Enable Time
0.5
6.6
tP HZ / tP LZ
Bus Disable Time
0.5
6.0
ns
Parameter Measurements
2xVDD
VIN
R1
VIN
VOUT
D.U.T.
VIN
VOUT
0V
20pF
R2
>2.4V
–2V
25ns
R1 = R2 = 10kΩ
Undershoot Test Circuit
Undershoot Test Waveforms
Notes:
1. See test circuit and waveforms.
2. This parameter is guaranteed but not tested on Propagation Delays.
3. The bus switch contributes no propagation 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 propagation 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.
Applications Information
Logic Inputs
The logic control inputs can be driven up to +5.5V regardless of the supply voltage. For example, given a +5.0V supply, BE, maybe
driven LOW to 0V and HIGH to 5.5V. Driving BE Rail-to-Rail minimizes power consumption.
Power-Supply Sequencing
Proper power-supply sequencing is recommended for all CMOS devices. Always apply Vcc before applying signals to the input/
output or control pins.
Hot Insertion
For Datacom and Telecom applications that have ten or more volts passing through the backplane, a high voltage from the power
supply may be seen at the device input pins during hot insertion. The PI5Cxxxx devices have maximum limits of 7V and 120mA for
20ns. If the power is higher or applied for a longer time or repeatedly reaches the maximum limits, the device can be damaged.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
3
PS8523A
08/27/02
PI5C3306CD
2-Bit Bus Switch with Dual Side
Undershoot Protection
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Packaging Mechanical: 8-Pin TSSOP (L)
Packaging Mechanical: 8-Pin MSOP (U)
.003
.012
0.07
0.30
15˚ Max.
.003
.012
0.07
0.30
Gauge
Plane
.010
0.25
.016
.028
0.40
0.70
15˚ Max.
.037
0.95
REF
0˚- 6˚
Detail A
.112 2.85
.120 3.05
Detail A
15˚ MAX
.114 2.90
.122 3.10
15˚ MAX
.114 2.90
.122 3.10
Thermal Characteristics can be found on the web: http://www.pericom.com/packaging/mechanicals.php
Ordering Information
Part
Pin - Package
Te mpe rature
PI5C3306CDL
8 - TSSOP (L)
–40°C to +85°C
PI5C3306CDU
8 - MSOP (U)
–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
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PS8523A
08/27/02