Datasheet PI3C32X384A, PI3C32X384B Datasheet (PERICOM)

1

PS8430A 12/10/99

BEA1

B

0

2

A

0

3

A

1

4

B

1

5

B

2

6

A

2

7

A

3

8

B

3

9

B

4

10

A

4

11

GND 12

BE

C

13

B

5

14

A

5

15

A

6

16

B

6

17

B

7

18

A

7

19

A

8

20

B

8

21

B

9

22

A

9

23

GND 24

48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25

VCC
B

19

A

19

A

18

B

18

B

17

A

17

A

16

B

16

B

15

A

15

BE

B

VCC
B

14

A

14

A

13

B

13

B

12

A

12

A

11

B

11

B

10

A

10

BE

D

Product Description

Pericom Semiconductors PI3C series of logic circuits are produced
using the Companys advanced submicron CMOS technology,
achieving industry performance.

The PI3C32X384, and PI3C32X2384 are 2.5V or 3.3Volt, high­bandwidth 20-bit, 2-port bus switches designed with a low ON
resistance allowing inputs to be connected directly to outputs. The
bus switch creates no additional propagational delay or additional
ground bounce noise. The switches are turned ON by the Bus
Enable (BE) input signal. Four bus enable signals are provided, one
for each of the upper and lower five bits of the two 10-bit buses. The
PI3C32X2384 is designed with an internal 25Ω resistor reducing
noise reflection in high-speed applications.

Product Pin Configuration

Product Pin Description

Pin Name Description

BEX Bus Enable Inputs (Active LOW)
A19 - A0 Bus A
B19 - B0 Bus B
GND Ground
V

CC

Power

Product Features

 Near-zero propagation delay
 Low noise, 25Ω version (PI3C32X2384)
5Ω switches connect inputs to outputs (PI3C32X384)
 High Bandwidth (>400 MHz)
 Permits Hot Insertion.
 5V I/O Tolerant
 2.5V Supply Voltage Operation
 Packages available:

 48-pin 150-mil wide plastic BQSOP (B)
 48-pin 240-mil wide plastic TSSOP (A)

Applications

 High Bandwidth Data switching
 Hot Docking

Truth Table

(1)

Logic Block Diagram

PI3C32X384

PI3C32X2384 (25

ΩΩ

ΩΩ

Ω)

2.5V/3.3V, High Bandwidth, Hot Insertion
20-Bit, 2-Port, Bus Switch

Note:

1. H = High Voltage Level, X = Dont Care,
L = Low Voltage Level, Hi-Z = High Impedance

48-Pin

A,B

BE

B

BE

A

A

19

A

15

B

19

B

15

A

4

A

0

B

4

B

0

BE

D

BE

C

A

14

A

10

B

14

B

10

A

9

A

5

B

9

B

5

Function BEA BEB B0-B4 B5-B9

Disconnect H H Hi-Z Hi-Z
Connect L H A4-A0 Hi-Z
Connect H L Hi-Z A19-A15
Connect L L A4-A0 A19-A15

Function BEC BED B9-B5 B14-B10

Disconnect H H Hi-Z Hi-Z
Connect L H A9-A5 Hi-Z
Connect H L Hi-Z A14-A10
Connect L L A9-A5 A14-A10

2

PS8430A 12/10/99

PI3C32X384/PI3C32X2384 (25

ΩΩ

ΩΩ

Ω)

2.5V/3.3V, High Bandwidth, Hot Insertion,
20-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 +5.5V

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.

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.

Maximum Ratings

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

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HI

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V

LI

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V

CC

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V

CC

V,.niM=

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V4.2=

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NO

Am51=

483X23C3IP851

4832X23C3IP815384

DC Electrical Characteristics (Over Operating Range, T

A

= 40°C to +85°C, V

CC

= 3.3V ±10%)

Capacitance (T

A

= 25°C f = 1 MHz)

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3

PS8430A 12/10/99

PI3C32X384/PI3C32X2384 (25

ΩΩ

ΩΩ

Ω)

2.5V/3.3V, High Bandwidth, Hot Insertion,
20-Bit, 2-Port BusSwitch

PI3C3384/PI3C32384 Switching Characteristics over 3.3V Operating Range

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 TTL driven input (control inputs only); A and B pins do not contribute to ICC.

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V

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483X23C3IP

4832X23C3IP

05.00.1

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∆I

CC

tupnIreptnerruCylppuS

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CC

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 5.2

Power Supply Characteristics

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Fp05=

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52.0

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L

Fp05=

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L

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5.15.6

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ZHP

t

ZLP

emiTelbasiDsuB

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5.15.5

PI3C3384/PI3C32384 Switching Characteristics over 2.5V Operating Range

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.

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5.18.9

t

ZHP

t

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5.13.8

4

PS8430A 12/10/99

PI3C32X384/PI3C32X2384 (25

ΩΩ

ΩΩ

Ω)

2.5V/3.3V, High Bandwidth, Hot Insertion,
20-Bit, 2-Port BusSwitch

4.0

2.0

0.0

0.0

1.0 2.0

3.0 4.0 5.0

V

OUT

, (V)

VIN, (V)

VCC = 3.3V

3.1V

2.9V

2.7V

2.5V

2.3V

3.6V

3.8V

3.4V

3.2V

3.0V

2.8V

Output Voltage vs. Input Voltage over Various Supply Voltages

traPegakcaP-niPsnoisnemiD

A483X23C3IP)A(POSST-84C°58+otC°04

B483X23C3IP)B(POSST-84C°58+otC°04

Ordering Information

Pericom Semiconductor Corporation

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