21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
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2109876543212109876543210987654321098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C3305
2-Bit Bus Switch with
Individual Enables
Product Features
•
•
•
•
Near zero propagation delay
5-Ohm switches connect inputs to outputs
Direct bus connection when switches are ON
Ultra Low Quiescent Power (0.2µA Typical)
– Ideally suited for notebook applications
• Packages available:
– 8-pin 173 mil wide plastic TSSOP (L)
– 8-pin 118 mil wide plastic MSOP (U)
Product Description
Pericom Semiconductor’s PI5C series of logic circuits are produced
using the Company’s advanced submicron CMOS technology,
achieving industry leading speed grades.
The PI5C3305 is a 2-bit bus switch designed with two individual
5-ohm bus switches with fast indiviual enables. When enabled via
the associated Bus Enable (BE) pin, the “A” pin is directly connected
to the “B” pin for that particular gate. The bus switch introduces no
additional propagation delay or additional ground bounce noise.
The PI5C3305 device has active HIGH enables.
Logic Block Diagram
Product Pin Configuration
A1
B1
BE1
BE1
A1
B1
B2
A2
GND
1
2
3
4
8-Pin
L, U
8
7
6
5
VCC
BE2
B2
A2
BE2
Product Pin Description
Pin Name
BEn
A2-A1
B2-B1
Vcc
GND
Description
Switch Enable
Bus A
Bus B
Power
Ground
Truth Table
(1)
BEn
X*
L
H
An
Hi-Z
Hi-Z
Bn
Bn
Hi-Z
Hi-Z
An
Vcc
GND
Vcc
Vcc
Function
Disconnect
Disconnect
Connect
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.
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C3305
2-Bit Bus Switch with
Individual Enables
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, T
A
= –40°C to +85°C, V
CC
= 4V to 5.5V)
Parameters
Description
V
IH
Input HIGH Voltage
V
IL
I
IH
I
IL
I
OZH
I
ON
V
H
R
ON
Input LOW Voltage
Input HIGH Current
Input LOW Current
Low Impedance Output Current
Input Hysteresis at Control Pins
Switch On Resistance
(3)
V
CC
= 4.5V, V
IN
= 0.0V, I
ON
= 30mA or 64mA
V
CC
= 4.5V, V
IN
= 2.4V, I
ON
= 15mA
Test Conditions
(1)
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
V
CC
= Max., V
IN
= V
CC
V
CC
= Max., V
IN
= GND
0
≤
A, B
≤
V
CC
150
5
10
7
15
Min.
2.0
–0.5
Typ
(2)
Max.
0.8
±1
±1
±1
±1
Units
V
V
µA
µA
µA
µA
m
V
Ω
High Impedance Output Current 0
≤
A, B
≤
V
CC
Capacitance
(T
A
= 25°C, f = 1 MHz)
Parameters
(4)
C
IN
C
OFF
C
ON
Description
Input Capacitance
A/B Capacitance, Switch Off
A/B Capacitance, Switch On
Test Conditions
V
IN
= 0V
V
IN
= 0V
V
IN
= 0V
Typ
3
5
10
Units
pF
pF
pF
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
= 5.0V, 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.
Power Supply Characteristics
Parameters Description
I
CC
∆I
CC
Quiescent Power Supply Current
Supply Current per Input @ TTL HIGH
Test Conditions
(1)
V
CC
= Max.
V
CC
= Max.
V
IN
= GND or V
CC
V
IN
= 3.4V
(3)
Min.
Typ
(2)
0.1
Max.
3.0
2.5
Units
µA
mA
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
= 5.0V, +25°C ambient.
3. Per TTL driven input (V
IN
= 3.4V, control inputs only); A and B pins do not contribute to Icc.
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PI5C3305
2-Bit Bus Switch with
Individual Enables
Switching Characteristics Over Operating Range
PI5C3305
Parame te rs
De s cription
Conditions
(1)
V
CC
=5V ±10%
M in.
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Propogation Delay
(2,3)
A to B, B to A
Bus Enable Time
Bus Disable Time
C
L
= 50pF
R
L
= 500
Ω
—
1. 0
1. 0
M a x.
0.25
4.9
4.2
V
CC
= 4V
M in.
M ax.
0.25
5.5
4.5
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.
Ordering Information
Part
PI5C3305L
PI5C3305UX
Pin - Package
8 - TSSOP (L)
–40°C to +85°C
8 - MSOP (U)
Te mpe rature
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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