PERICOM PI3C3125

PI3C3125
PI3C3126
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2.5V/3.3V, High Bandwidth, Hot Insertion,4-Bit,
2-Port Bus Switch with Individual Enables
Product Features
• Near zero propagation delay
Product Description
• 5Ω switches connect inputs to outputs
Pericom Semiconductor’s PI3C series of logic circuits are produced
using the Company’s advanced sub micron CMOS technology,
achieving industry leading speed grades.
• High Bandwidth (>400 MHz)
• Rail-to-Rail, or 2.5V or 3.3V Switching
The PI3C3125A and PI3C3126A are 2.5V or 3.3 Volt, 4-bit bus
switches designed with four individual 5Ω bus switches with fast
indiviual enables in an industry standard 74XX125/126 pinout.
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.
• 5V I/O Tolerant
•
2.5V Supply Voltage Operation
• Permits Hot Insertion
• Packages available:
– 14-pin 150 mil wide plastic SOIC (W)
– 14-pin 170 mil wide plastic TSSOP(L)
The PI3C3125 device has active LOW enables, and the PI3C3126A
has active HIGH enables. It is very useful in switching signals that
have high bandwidth (>400 MHz).
– 16-pin 150 mil wide plastic QSOP (Q)
Applications
• High Bandwidth Data Switching
• Hot Docking
PI3C3125 Logic Block Diagram
A0
PI3C3126 Logic Block Diagram
A0
B0
BE0
A1
BE0
A1
B1
BE1
A2
B1
BE1
B2
A2
BE2
A3
B0
B2
BE2
B3
A3
BE3
B3
BE3
1
PS8153B
12/10/99
PI3C3125/PI3C3126
2.5V/3.3V, High Bandwidth,
Hot Insertion, 4-Bit, 2-Port Bus Switch
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Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
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.
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
PI3C3125 14-Pin Configuration
BE0
A0
B0
BE1
A1
B1
GND
1
14
2
13
3
12
14-PIN
14-Pin
4 L,W 11
W14
5
10
6
9
7
8
Vcc
BE3
A3
B3
BE2
A2
B2
PI3C3125 16-Pin Configuration
NC
BE0
A0
B0
BE1
A1
B1
GND
1
16
2
15
3
16-PIN 14
4 16-Pin 13
Q16
Q
5
12
6
11
7
10
8
9
Vcc
BE3
A3
B3
BE2
A2
B2
NC
BE0
A0
B0
BE1
A1
B1
GND
1
14
2
13
3
12
14-PIN
14-Pin
4
11
W14
L,W
5
10
6
9
7
8
Vcc
BE3
A3
B3
BE2
A2
B2
PI3C3126 16-Pin Configuration
NC
BE0
A0
B0
BE1
A1
B1
GND
1
16
2
15
3
16-PIN 14
4 16-Pin 13
Q16
Q 12
5
6
11
7
10
8
9
Vcc
BE3
A3
B3
BE2
A2
B2
NC
Truth Table(1)
Pin Description
Pin Name
BEn
BEn
A3-A0
B3-B0
VCC
GND
PI3C3126 14-Pin Configuration
Description
Switch Enable (PI3C3125)
Switch Enable (PI3C3126)
Bus A
Bus B
Power
Ground
PI3C3125
BEn
X*
H
L
PI3C3126
BEn
X
L
H
An
Hi-Z
Hi-Z
Bn
Bn
Hi-Z
Hi-Z
An
VCC
GND
VCC
VCC
Function
Disconnect
Disconnect
Connect
Note:
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.
2
PS8153B
12/10/99
PI3C3125/PI3C3126
2.5V/3.3V, High Bandwidth,
Hot Insertion, 4-Bit, 2-Port Bus Switch
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DC Electrical Characteristics (Over Operating Range, TA = –40°C to +85°C, VCC = 3.3V ±10%)
Test Conditions(1)
Parameters Description
Typ.(2) Max.
Min.
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(4)
0.8
Units
V
µA
±1
VCC = Min., IIN = –18mA
VCC = Min., VIN = 0.0V, ION = 48mA or 60mA
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(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.
Power Supply Characteristics
Parameters Description
Test Conditions(1)
ICC
Quiescent Power
Supply Current
VCC = Max.
VIN = GND or VCC
∆ICC
Supply Current per
Input HIGH
VCC = Max.
VIN = 3.0V(3)
Min.
Typ.(2) Max.
260
Units
500
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.
3
PS8153B
12/10/99
PI3C3125/PI3C3126
2.5V/3.3V, High Bandwidth,
Hot Insertion, 4-Bit, 2-Port Bus Switch
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PI3C3125/PI3C3126 Switching Characteristics over 3.3V Operating Range
Conditions(1)
Parameters Description
t PLH
t PHL
tPZH
tPZL
tPHZ
tPLZ
Propagation Delay(2,3) CL = 50 pF,
A to B, B to A
RL = 500Ω
Bus Enable Time
CL = 50 pF,
Bus Disable Time
RL = 500Ω,
R = 500Ω
PI3C3125/PI3C3126
Com.
Min.
Max.
Units
0.25
1.5
6.5
1.5
5.5
ns
PI3C3125/PI3C3126 Switching Characteristics over 2.5V Operating Range
Conditions(1)
Parameters Description
t PLH
tPHL
t PZH
t PZL
t PHZ
t PLZ
Delay(2,3)
Propagation
A to B, B to A
Bus Enable Time
Bus Disable Time
PI3C3125/PI3C3126
Com.
Min.
Max.
CL = 50 pF,
RL = 500Ω
CL = 50 pF,
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.
4
PS8153B
12/10/99
PI3C3125/PI3C3126
2.5V/3.3V, High Bandwidth,
Hot Insertion, 4-Bit, 2-Port Bus Switch
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4.0
VCC = 3.3V
3.8V
3.6V
3.1V
2.9V
3.4V
3.2V
2.7V
2.5V
3.0V
2.8V
VOUT, (V)
2.3V
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
Output Voltage vs. Input Voltage over Various Supply Voltages
Ordering Information
Part
Pin - Package
Te mpe rature
PI3C3125L
14 - TSSO P (L)
–40ºC to +85ºC
PI3C3125W
14 - SO IC (W)
–40ºC to +85ºC
PI3C3125Q
16 - Q SO P (Q )
–40ºC to +85ºC
PI3C3126L
14 - TSSO P (L)
–40ºC to +85ºC
PI3C3126W
14 - SO IC (W)
–40ºC to +85ºC
PI3C3126Q
16 - Q SO P (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
5
PS8153B
12/10/99