Datasheet PI5C34X245B, PI5C34X245Z Datasheet (PERICOM)

1

PS7058C 08/02/01

Product Features

 Near-zero propagation delay
 5-ohm switches connect inputs to outputs
 Direct bus connection when switches are ON
 Ultra-low quiescent power (0.2µA typical)

 Ideally suited for notebook applications
 Pin compatible with QS34X245
 Industrial operating temperature: 40°C to +85°C
 Packages available:
 80-pin 150 mil wide plastic BQSOP (B)
 80-pin plastic very Fine Pitch dual flat No lead (DFN) (Z)

Logic Block Diagram

Product Pin Configuration

Product Pin Description

Pin Name I/O Description

BEn I Bus Enable Input (Active LOW)
A0-A31 I/O Bus A
B0-B31 I/O Bus B

Truth Table

(1)

Note:

1. H = High Voltage Level

L = Low Voltage Level
Hi-Z = High Impedance

Product Description

Pericom Semiconductors PI5C series of logic circuits are produced
using the Companys advanced submicron CMOS technology.

The PI5C34X245 is a 32-bit, 2-port bus switch. Four enable signals
(BEn) turn the switches on. The bus switch creates no additional
propagational delay or additional ground bounce noise.

PI5C34X245

32-Bit, 2-Port Bus Switch

BE

1

A

7

A

0

B

7

B

0

BE

2

A

15

A

8

B

15

B

8

BE

3

A

23

A

16

B

23

B

16

BE

4

A

31

A

24

B

31

B

24

NC 1

2
3
4
5
6
7
8
9

GND 10

11
12
13
14
15
16
17
18
19
20

GND

BE1

80
79
78
77
76
75

V

CC

74
73
72
71
70
69
68
67
66
65
64
63
62

B

15

61

A

0

A

1

A

2

A

3

A

4

A

5

A

6

A

7

NC

A

8

A

9

A

10

A

11

A

12

A

13

A

14

A

15

B

14

B

13

B

12

B

11

B

10

B

9

B

8

BE2

V

CC

B

0

B

1

B

2

B

3

B

4

B

5

B

6

B

7

NC 21

22
23
24
25
26
27
28
29

GND 30

31
32
33
34
35
36
37
38
39
40

GND

BE3

60
59
58
57
56
55

V

CC

54
53
52
51
50
49
48
47
46
45
44
43
42

B

31

41

A

16

A

17

A

18

A

19

A

20

A

21

A

22

A

23

NC

A

24

A

25

A

26

A

27

A

28

A

29

A

30

A

31

B

30

B

29

B

28

B

27

B

26

B

25

B

24

BE4

V

CC

B

16

B

17

B

18

B

19

B

20

B

21

B

22

B

23

80-Pin

B, Z

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PS7058C 08/02/01

2

PI5C34X245

32-Bit, 2-Port BusSwitch

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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.

DC Electrical Characteristics (Over the Operating Range, T

A

= 40°C to +85°C, VCC = 5V ±10%)

Capacitance (T

A

= 25°C, f = 1 MHz)

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 = 5.0V, 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.

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 +7.0V

DC Input Voltage .................................................................. 0.5V to +7.0V

DC Output Current ........................................................................... 120 mA

Power Dissipation ................................................................................ 0.5W

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3

PI5C34X245

32-Bit, 2-Port BusSwitch

PS7058C 08/02/01

Power Supply Characteristics

Notes:

1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.

2. Typical values are at Vcc = 5.0V, +25°C ambient.

3. Per TTL driven input (VIN = 3.4V, control inputs only); A and B pins do not contribute to Icc.

4. This current applies to the control inputs only and represent the current required to switch internal capacitance at the
specified frequency. The A and B inputs generate no significant AC or DC currents as they transition. This parameter
is not tested, but is guaranteed by design.

PI5C34X245 Switching Characteristics over 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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PS7058C 08/02/01

4

PI5C34X245

32-Bit, 2-Port BusSwitch

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Pericom Semiconductor Corporation

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

80-Pin 150 Mil Wide Plastic BQSOP (B) Package

3.80

4.00

0.254

.0197

0.50

5˚

Gauge Plane

.150
.157

X.XX
X.XX

DENOTES DIMENSIONS
IN MILLIMETERS

.228
.244

5.80

6.20

.010

.063

.010
.016

0.254

0.406

0.803

0.811

20.40

20.60

.007
.010

0.17

0.27

40

80

x 45˚

41

1

.019

1.60

.002
.009

0.05

0.25

.078

2.0

5˚

.019
.029

0.50

0.75

.008 NOM

0.203

0.50
REF

BSC

Max

Nom

BSC

80-Pin Plastic Very Fine Pitch Dual Flat No lead (DFN) (Z) Package

0.10 M C A B

0.90

.035

NOM

2.925

.115

NOM

.232
.240

5.90

6.10

.803
.811

20.40

20.60

.008

0.20

LEAD THICKNESS

NOM

.033

0.84

MAX

.020

0.50

BSC

.00

.0016

0.00

0.04

STANDOFF

.007

.011

0.17

0.27

2 PLACES

4 PLACES

0.85

.033

NOM

2 PLACES

.014
.016

0.35
.040

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B542X43C5IP)B(POSQB08C°58+otC°04

Z542X43C5IP)Z(NFD08C°58+otC°04

Ordering Information