ETC PI3B3125W

PI3B3125
PI3B3126
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3.3V, Hot Insertion, 4-Bit,
2-Port Bus Switch
with Individual Enables
Product Features
Product Description
• Near zero propagation delay
• 5 Ohm switches connect inputs to outputs
• Fast Switching Speed - 4ns max.
• Permits Hot Insertion
• Ultra Low Quiescent Power (0.1µA Typical)
– Ideally suited for notebook applications
• Packages available:
– 14-pin 150 mil wide plastic SOIC (W)
– 14-pin 170 mil wide plastic TSSOP (L)
– 16-pin 150 mil wide plastic QSOP (Q)
Pericom Semiconductor’s PI3B series of logic circuits are produced
using the Company’s advanced sub micron CMOS technology,
achieving industry leading speed grades.
The PI3B3125 and PI3B3126 are 3.3 Volt, 4-bit bus switches designed
with four individual 5Ohm 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.
The PI3B3125 device has active LOW enables, and the PI3B3126 has
active HIGH enables.
PI3B3125 Logic Block Diagram
PI3B3126 Logic Block Diagram
A0
A0
B0
BE0
A1
BE0
A1
B1
BE1
A2
B1
BE1
B2
A2
BE2
A3
B0
B2
BE2
B3
A3
BE3
B3
BE3
1
PS8153D
01/05/00
PI3B3125/PI3B3126
3.3V, Hot Insertion, 4-Bit,
2-Port BusSwitch
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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 +4.6V
DC Output Current ..............................................................................120mA
Power Dissipation ................................................................................... 0.5W
PI3B3125 14-Pin
Product Pin Configuration
BE0
A0
B0
BE1
A1
B1
GND
1
14
2
13
3
14-PIN 12
4 W, L 11
W14
5
10
6
9
7
8
Vcc
BE3
A3
B3
BE2
A2
B2
PI3B3125 16-Pin
Product Pin Configuration
NC
BE0
A0
B0
BE1
A1
B1
GND
1
16
2
15
3
16-PIN 14
4
Q 13
Q16
5
12
6
11
7
10
8
9
Vcc
BE3
A3
B3
BE2
A2
B2
NC
Product Pin Description
Pin Name
BEn
BEn
A3-A0
B3-B0
VCC
GND
Description
Switch Enable (PI3B3125)
Switch Enable (PI3B3126)
Bus A
Bus B
Power
Ground
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.
PI3B3126 14-Pin
Product Pin Configuration
BE0
A0
B0
BE1
A1
B1
GND
1
14
2
13
3
14-PIN 12
4 W, L 11
W14
5
10
6
9
7
8
Vcc
BE3
A3
B3
BE2
A2
B2
PI3B3126 16-Pin
Product Pin Configuration
NC
BE0
A0
B0
BE1
A1
B1
GND
1
16
2
15
3
16-PIN 14
4
Q 13
Q16
5
12
6
11
7
10
8
9
Vcc
BE3
A3
B3
BE2
A2
B2
NC
Truth Table(1)
PI3B3125
BEn
X*
H
L
PI3B3126
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 = Dont Care
* A pull-up resistor should be provided for power-up protection.
2
PS8153D
01/05/00
PI3B3125/PI3B3126
3.3V, Hot Insertion, 4-Bit,
2-Port BusSwitch
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DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 3.3V ±10%)
Parameters Description
Test Conditions(1)
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
IIL
Typ.(2)
Max.
Units
V
0.8
V
VCC = Max., VIN = VCC
±1
µA
Input LOW Current
VCC = Max., VIN = GND
±1
µA
IOFF
Off Current
VCC = 0, VOUT = 3 to 3.6V
10
µA
VIK
Clamp Diode Voltage
VCC = Min., IIN = –18mA
–1.2
V
RON
Switch On Resistance(3)
VCC = Min., VIN = 0.0V, ION = 48mA or 60mA
VCC = Min., VIN = 2.4V, ION = 15mA
8
17
Ω
5
10
Capacitance (TA = 25°C, f = 1 MHz)
Parameters(4)
CIN
COFF
Description
Test Conditions
Typ.
Units
Input Capacitance
A/B Capacitance, Switch Off
VIN = 0V
VIN = 0V
3.5
8
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 VCC = 3.3V, 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.
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.
0.1
Units
3
µA
750
µA
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 inputs only); A and B pins do not contribute to ICC.
3
PS8153D
01/05/00
PI3B3125/PI3B3126
3.3V, Hot Insertion, 4-Bit,
2-Port BusSwitch
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PI3B3125 Switching Characteristics over Operating Range
PI3B3125
Com.
Parameters
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
Conditions(1)
Description
Propagation Delay(2,3)
Ax to Bx, Bx to Ax
Bus Enable Time
Bus Disable Time
CL = 50pF
RL = 500Ω
CL = 50pF,
RL = 500Ω,
R = 500Ω
Min.
Max.
Units
0.25
ns
1.0
3.0
ns
1.0
4.0
ns
PI3B3126 Switching Characteristics over Operating Range
PI3B3125
Com.
Parameters
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
Conditions(1)
Description
Propagation Delay(2,3)
Ax to Bx, Bx to Ax
Bus Enable Time
Bus Disable Time
CL = 50pF
RL = 500Ω
CL = 50pF,
RL = 500Ω,
R = 500Ω
Min.
Max.
Units
0.25
ns
1.0
2.5
ns
1.0
4.0
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.
Ordering Information
Part Numbe r
Pin / Package
Te mpe rature
PI3B3125Q
16- QSOP (Q )
–40°C to +85°C
PI3B3125W
14- SOIC (W)
–40°C to +85°C
PI3B3125L
14- TSSOP (L)
–40°C to +85°C
PI3B3126Q
16- QSOP (Q )
–40°C to +85°C
PI3B3126W
14- SOIC (W)
–40°C to +85°C
PI3B3126L
14- TSSOP (L)
–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
4
PS8153D
01/05/00