PI3CH281
Low Voltage, High Bandwidth, 2-Channel, 4:1
Mux/DeMux,
NanoSwitch
™
with Single Enable
Features
• Near-zero propagation delay
• 5Ω switches connect inputs to outputs
• High signal passing bandwidth (300MHz)
• Beyond Rail-to-Rail switching
• 5V I/O tolerant with 3.3V supply
• 2.5V and 3.3V supply voltage operation
• Hot insertion capable
• Industrial operating temperature: -40ºC to +85ºC
• 2KV ESD Protection (human body model)
• Latch-up performance >250mA per JESD17
• Packaging (Pb-free & greeen available):
– 16-pin 150-mil wide plastic QSOP (Q)
– 16-pin 173-mil wide plastic TSSOP (L)
– 20-contact TQFN (ZH)
Description
Pericom Semiconductor’s PI3CH series of switch circuits are
produced using the Company’s advanced sub-micron CMOS
technology, achieving industry leading performance.
The PI3CH281 is a 2-channel, 4:1 Multiplexer/Demultiplexer with
3-state outputs. The switch introduces no additional ground bounce
noise or propagation delay.
The PI3CH281 device is very useful in switching signals that have
high bandwidth (300MHz).
Block Diagram
IA0
IA1
IA2
IA3
IB0
IB1
IB2
IB3
Pin Configuration
N.C.
1
V
CC
20
19½
18
17
EN
EN
S1
IA3
IA2
1
2
3
4
5
6
7
8
16-pin
L, Q
16
15
14
13
12
11
10
9
VCC
N.C.
S0
IB3
IB2
IB1
IB0
YB
EN
S1
IA3
IA2
IA1
IA0
YA
N.C.
2
3
4
5
6
7
8
9
10
11
N.C.
N.C.
S0
IB3
IB2
IB1
IB0
YB
S0
S1
IA1
IA0
YA
GND
20-Contact 16
ZH
15
14
13
12
N.C.
GND
YA
YB
Notes:
1. N.C = No internal connection
1
PS8726A
07/08/04
PI3CH281
Low Voltage, High Bandwidth, 2-Channel, 4:1
Mux/DeMux,
NanoSwitch
™
with Single Enable
Pin Description
Pin Name
IA
N
, IB
N
S0-1
EN
YA to YB
GND
V
CC
Description
Data Inputs
Select Inputs
Enable
Data Outputs
Ground
Power
Truth Table
(1)
Enable
EN
H
L
L
L
L
S1
X
L
L
H
H
Select
S0
X
L
H
L
H
Y
Hi-Z
I0
I1
I2
I3
Function
Disable
S1-0 = 0
S1-0 = 1
S1-0 = 2
S1-0 = 3
Notes:
1. H=High Voltage Level; L=Low Voltage Level
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 ........................... –0.5V to +4.6V
DC Input Voltage ........................................................ –0.5V to +6.0V
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 re-
liability.
DC Electrical Characteristics, 3.3V Supply
(Over the Operating Range, T
A
= –40°C to +85°C, V
CC
= 3.3V ±10%)
Parameters
V
IH
V
IL
V
IK
I
IH
I
IL
I
OZH
R
ON
Description
Input HIGH Voltage
Input LOW Voltage
Clamp Diode Voltage
Input HIGH Current
Input LOW Current
Test Conditions
(1)
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
V
CC
=
Min.,
I
IN
= –18
mA
V
CC
=
Max.,
V
IN
= V
CC
V
CC
=
Max.,
V
IN
= GND
V
CC
= Min.,
V
IN
= 0.0V,
I
ON
=
48 mA or -64mA
V
CC
= Min.,
V
IN
= 3.6V,
I
ON
= -15
mA
Min.
2.0
–0.5
-1.3
0.8
–1.8
±1
±1
±1
4
5
6
8
Ω
µA
V
Typ
(2)
Max.
Units
High Impedance Output Current
0 ≤ Y, In ≤ V
CC
Switch On-Resistance
(4)
2
PS8726A
07/08/04
PI3CH281
Low Voltage, High Bandwidth, 2-Channel, 4:1
Mux/DeMux,
NanoSwitch
™
with Single Enable
DC Electrical Characteristics, 2.5V Supply
(Over Operating Range, T
A
= –40°C to +85°C, V
CC
= 2.5V ± 10%)
Parameters
(5)
V
IH
V
IL
V
IK
I
IH
IIL
I
OZH
R
ON
Description
Input HIGH Voltage
Inout LOW Voltage
Clamp Diode Voltage
Input HIGH Current
Input LOW Current
High Impedance Current
(3)
Switch On-Resistance
(4)
Test Conditions
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
V
CC
= Max., I
IN
= –6mA
V
CC
= Max., V
IN
= V
CC
V
CC
= Max., V
IN
= GND
0 ≤ Y, In ≤ V
CC
V
CC
= Min., V
IN
=0.0V,
I
ON
= –48mA
V
CC
= Min., V
IN
= 2.25V,
I
ON
= -15mA
Min.
1.8
–0.3
–
–
–
–
–
–
Typ.
–
–
–0.7
–
–
–
6
7
Max.
V
CC
+ 0.3
0.8
–1.8
±1
±1
±1
8
Units
V
µA
Ω
14
Capacitance
(T
A
= 25°C f = 1 MHz)
Parameters
(5)
C
IN
C
OFF(IN)
C
OFF(Y)
C
ON
Description
Input Capacitance
In Capacitance, Switch Off
Y Capacitance, Switch Off
Y/In Capacitance, Switch On
V
IN
= 0V
Test Conditions
Typ.
3.0
3.5
12
15.0
pF
Units
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. 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 Y and In pin at indicated current through the switch. On-Resistance is determined
by the lower of the voltages on the two (Y, In) pins.
5. This parameter is determined by device characterization but is not production tested.
Power Supply Characteristics
Parameters
Description
I
CC
Quiescent Power Supply Current
Test Conditions
(1)
V
CC
= 3.6V, V
IN
= GND or V
CC
Min.
Typ.
(2)
Max.
0.8
Units
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
= 3.3V, +25°C ambient.
3
PS8726A
07/08/04
PI3CH281
Low Voltage, High Bandwidth, 2-Channel, 4:1
Mux/DeMux,
NanoSwitch
™
with Single Enable
Dynamic Electrical Characteristics Over the Operating Range
(T
A
= -40º to +85º, V
CC
= 3.3V ± 10%)
Parameter
X
TALK
O
IRR
BW
Description
Crosstalk
Off-Isolation
-3dB Bandwidth
Test Condition
See Test Diagram
See Test Diagram
See Test Diagram
200
Min.
Typ.
-60
-60
300
Max.
Units
dB
MHz
Switching Characteristics over 3.3V Operating Range
Parameters
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Description
Propogation Delay
(2,3)
Y to In, In to Y
Enable Time S or EN to Y or In
See Test Diagram
Disable Time S or EN to Y or In
1.5
9.0
Conditions
(1)
See Test Diagram
1.5
Com.
Min.
Typ.
Max.
0.3
9.0
ns
Units
Switching Characteristics over 2.5V Operating Range
Parameters
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Description
Propogation Delay
(2,3)
Y to In, In to Y
Enable Time S or EN to Y or In
See Test Diagram
Disable Time S or EN to Y or In
1.5
12.0
Conditions
(1)
See Test Diagram
1.5
Com.
Min.
Max.
0.3
15.0
ns
Units
Notes:
1. See test circuit and waveforms.
2. This parameter is guaranteed but not tested on Propagation Delays.
3. The 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 0.30ns for 10pF 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 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.
4
PS8726A
07/08/04
PI3CH281
Low Voltage, High Bandwidth, 2-Channel, 4:1
Mux/DeMux,
NanoSwitch
™
with Single Enable
Test Circuit for Electrical Characteristics
(1)
6.0V
VCC
200Ω
Pulse
Generator
VIN
D.U.T
RT
VOUT
10pF
CL
200Ω
Notes:
1. C
L
= Load capacitance: includes jig and probe capacitance.
2. R
T
= Termination resistance: should be equal to Z
OUT
of the Pulse Generator
3. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
4. All input impulses are supplied by generators having the following characteristics: PRR ≤ MHz, Z
O
= 50Ω, t
R
≤ 2.5ns, t
F
≤ 2.5ns.
5. The outputs are measured one at a time with one transition per measurement.
Switch Positions
Test
t
PLZ
, t
PZL
t
PHZ
, t
PZH
Prop Delay
Switch
6.0V
GND
Open
Test Circuit for Dynamic Electrical Characteristics
S1
HP4195A
R1
T1
V
CC
HP11667A
D.U.T
10pF
50Ω
5
PS8726A
07/08/04
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