Datasheet PI3B3125L, PI3B3125Q, PI3B3125W, PI3B3126L, PI3B3126Q Datasheet (PERICOM)

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PI3B3125
PI3B3126

3.3V, Hot Insertion, 4-Bit,
2-Port Bus Switch

with Individual Enables

Product Features

 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)

Product Description

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

BE0

B0

A0

BE0

B0

A1

BE1

A2

BE2

A3

BE3

B1

B2

B3

A1

BE1

A2

BE2

A3

BE3

B1

B2

B3

1

PS8153D 01/05/00

Maximum Ratings

(Above which the useful life may be impaired. For user guidelines, not tested.)

PI3B3125/PI3B3126

3.3V, Hot Insertion, 4-Bit,
2-Port BusSwitch

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
2
3

14-PIN

4
5
6
7

W, L

W14

14
13
12
11
10

Vcc
BE3
A3
B3
BE2
A2

9

B2

8

PI3B3126 14-Pin
Product Pin Configuration

A0
B0

A1
B1

1
2
3

14-PIN

4
5
6
7

W, L

W14

BE0

BE1

GND

14
13
12
11
10

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.

Vcc
BE3
A3
B3
BE2
A2

9

B2

8

PI3B3125 16-Pin
Product Pin Configuration

NC

BE0

A0
B0

BE1

A1
B1

GND

1
2
3

16-PIN

4

QQ

Q16

5
6
7
8

16
15
14
13
12
11
10

Vcc
BE3
A3
B3
BE2
A2
B2
NC

9

Product Pin Description

Pin Name Description

BEn Switch Enable (PI3B3125)
BEn Switch Enable (PI3B3126)
A3-A0 Bus A
B3-B0 Bus B
V

CC

GND Ground

Power

PI3B3126 16-Pin
Product Pin Configuration

1

NC

A0
B0

A1
B1

2
3

16-PIN

4
5
6
7
8

Q16

(1)

BE0

BE1

GND

Truth Table

PI3B3125 PI3B3126

BEn BEn An Bn Vcc Function

X* X Hi-Z Hi-Z GND Disconnect

H L Hi-Z Hi-Z V

LHBnAnV

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.

16
15
14
13
12
11
10

Vcc
BE3
A3
B3
BE2
A2
B2
NC

9

Disconnect

CC

Connect

CC

2

PS8153D 01/05/00

PI3B3125/PI3B3126

3.3V, Hot Insertion, 4-Bit,
2-Port BusSwitch

DC Electrical Characteristics (Over the Operating Range, T

Parameters Description Test Conditions

V
V
I
I
I
V
R

IH

IL

IH

IL

OFF

IK

ON

Input HIGH Voltage Guaranteed Logic HIGH Level 2.0 V
Input LOW Voltage Guaranteed Logic LOW Level –0.5 0.8 V
Input HIGH Current VCC = Max., VIN = V
Input LOW Current VCC = Max., VIN = GND ±1 µ A
Off Current VCC = 0, V

OUT

Clamp Diode Voltage VCC = Min., IIN = –18m A –1.2 V
Switch On Resistance

(3)

VCC = Min., VIN = 0.0V, ION = 48mA or 60mA 5 8 Ω

= –40°C to +85°C, VCC = 3.3V ±10%)

A

CC

(1)

Min. Typ.

(2)

Max. Units

±1 µA

= 3 to 3.6V 10 µA

VCC = Min., VIN = 2.4V, ION = 1 5m A 10 17

Capacitance (T

Parameters

C

IN

C

OFF

= 25°C, f = 1 MHz)

A

(4)

Description Test Conditions Typ. U n i t s

Input Capacitance VIN = 0V 3.5 pF
A/B Capacitance, Switch Off VIN = 0V 8 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

I

CC

Quiescent Power VCC = Max. VIN = GND or V

(1)

Min. Typ.

CC

Supply Current

∆I

CC

Supply Current per VCC = Max. VIN = 3.0V

(3)

Input HIGH

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.

(2)

Max. Units

0.1 3 µA

750 µA

3

PS8153D 01/05/00

PI3B3125 Switching Characteristics over Operating Range

PI3B3125

Com.

Parameters Description Conditions

t

PLH

t

PHL

t

PZH

t

PZL

t

PHZ

t

PLZ

Propagation Delay
Ax to Bx, Bx to Ax RL = 500Ω 0.25 ns
Bus Enable Time CL = 50pF,

Bus Disable Time R = 500Ω

(2,3)

CL = 50pF

RL = 500Ω, 1.0 3.0 ns

(1)

Min. Max. Units

1.0 4.0 ns

PI3B3126 Switching Characteristics over Operating Range

PI3B3125

Com.

Parameters Description Conditions

t

PLH

t

PHL

t

PZH

t

PZL

t

PHZ

t

PLZ

Propagation Delay
Ax to Bx, Bx to Ax RL = 500Ω 0.25 ns
Bus Enable Time CL = 50pF,

Bus Disable Time R = 500Ω

(2,3)

CL = 50pF

RL = 500Ω, 1.0 2.5 ns

(1)

Min. Max. Units

1.0 4.0 ns

PI3B3125/PI3B3126

3.3V, Hot Insertion, 4-Bit,
2-Port BusSwitch

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

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Q5213B3IP)Q(POSQ-61C°58+otC°04

W5213B3IP)W(CIOS-41C°58+otC°04

L5213B3IP)L(POSST-41C°58+otC°04

Q6213B3IP)Q(POSQ-61C°58+otC°04

W6213B3IP)W(CIOS-41C°58+otC°04

L6213B3IP)L(POSST-41C°58+otC°04

Pericom Semiconductor Corporation

2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax [phone] • http://www.pericom.com

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PS8153D 01/05/00