ETC PI3B34X245B

PI3B34X245
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3.3V Hot Insertion
32-Bit, 2-Port Bus Switch
Product Features
Product Description
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Pericom Semiconductor’s PI3B series of logic circuits are produced
in the company’s advanced submicron CMOS technology.
The PI3B34X245 is a 3.3V, 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.
Fast Switching Speed - 4.5ns max.
Permits Hot Insertion
Near-zero propagation delay
5 Ohm switches connect inputs to outputs
Direct bus connection when switches are ON
Ultra-low quiescent power (1.0µA typical)
– Ideally suited for notebook applications
• Industrial operating temperature: –40°C to +85°C
• Packages available:
– 80-pin, 150-mil wide plastic BQSOP (B)
• TTL - compatible control of input levels
Product Pin Configuration
NC
A0
A1
A2
A3
A4
Logic Block Diagram
A5
A6
A7
A0
B0
GND
A7
B7
A9
NC
A8
A10
A11
BE1
A8
A15
A12
A13
A14
A15
B8
GND
B15
NC
B16
A16
A17
A18
A19
A20
B23
A21
A22
A23
BE2
A16
A23
GND
NC
A24
BE3
A24
B24
A31
B31
A25
A26
A27
A28
A29
A30
A31
BE4
GND
1
1
2
3
4
5
6
80
VCC
79
78
77
76
BE1
B0
B1
B2
B3
7
8
9
10
75
74
73
72
71
11
12
13
14
70
69
68
67
15 80-PIN 66
B
65
16
64
17
63
18
62
19
61
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
B4
B5
B6
B7
VCC
BE2
B8
B9
B10
B11
B12
B13
B14
B15
60
VCC
59
58
57
56
55
54
53
52
BE3
B16
B17
B18
B19
B20
51
50
49
48
47
46
45
44
43
42
41
B21
B22
B23
VCC
BE4
B24
B25
B26
B27
B28
B29
B30
B31
PS8335A
10/05/00
PI3B34X245
3.3V
Hot
Insertion
32-Bit,
2-Port
BusSwitch
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Truth Table(1)
Function
Disconnect
Connect
Product Pin Description
BEn
H
L
A0–31
Hi-Z
B0–31
Pin Name
BEn
A0-A31
B0-B31
Notes:
1. H = High Voltage Level
L = Low Voltage Level
Hi-Z = High Impedance
I/O
I
I/O
I/O
Description
Bus Enable Input (Active LOW)
Bus A
Bus B
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 +7.0V
Supply Voltage to Ground Potential (Outputs & D/O Only) .... –0.5V to +7.0V
DC Input Voltage ...................................................................... –0.5V to +7.0V
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.
DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 3.3V ± 10%)
Parame te rs
De s cription
Te s t Conditions
M in.
Typ.
M ax.
VIH
Input HIGH Voltage
Guaranteed Logic HIGH Level
2.0


VIL
Input LOW Voltage
Guaranteed Logic LOW Level
−0.5

0.8
IIH
Input HIGH Current
VCC = Max., VIN = VCC


IIL
Input LOW Current
VCC = Max., VIN = GND


IOZH
High Impedence Output Current
0 ≤ A, B ≤ VCC


VIK
Clamp Diode Voltage
VCC = Min., INN = −18mA

RON
Switch On Resistance
VCC = Min., VIN = 0.0V, ION = 48mA
VCC = Min., VIN = 2.4V, ION = 15mA
Units
V
±1
µΑ

−0.8
V

5
8

10
17
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
8.0
pF
pF
CON
A/B Capacitance, Switch On
VIN = 0V
16.0
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. 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.
2
PS8335A
10/05/00
PI3B34X245
3.3V
Hot
Insertion
32-Bit,
2-Port
BusSwitch
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Power Supply Characteristics
Parame te rs
De s cription
ICC
Quiescent Power
Supply Current
∆ΙCC
Supply Current per
Input @ TTL HIGH
Te s t Conditions (1)
VCC = Max.
VIN = GND or VCC
M in.
Typ.(2)
M ax.

1.0
10
Units
µA
VCC = Max.
VIN = 3.0V(3)


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 TTL driven input (control input 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.
Switching Characteristics over Operating Range
PI3B34X245
Parame te rs
D e s cription
tPLH
tPHL
Propagation Delay (2,3)
Ax to Bx, Bx to Ax
tPZH
tPZL
Bus Enable Time
BE to Ax or Bx
tPHZ
tPLZ
Bus Disable Time
BE to Ax or Bx
Conditions (1)
CL = 50pF
RL = 500Ω
CL = 50pF
RL = 500Ω
R = 500Ω
Com.
Units
M in.
M ax.

0.25
1.0
4.0
1.0
4.5
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.
3
PS8335A
10/05/00
PI3B34X245
3.3V
Hot
Insertion
32-Bit,
2-Port
BusSwitch
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Packaging Mechanical: 80-pin BQSOP
80
41
.150
.157
3.80
4.00
.228
.244
5.80
6.20
.008 NOM
0.203
Gauge Plane
5˚
1
.019 0.50
.029 0.75
40
0.50
.019
REF
0.803
0.811
20.40
20.60
.010
.016
.063
1.60
Nom
.0197
BSC
0.50
X.XX
X.XX
.007
.010
0.17
0.27
.010
0.254 BSC
0.254 x 45˚
0.406
.078
2.0
Max
5˚
.002
.009
0.05
0.25
DENOTES DIMENSIONS
IN MILLIMETERS
Ordering Information
Orde ring Code
Package Type
PI3B34X245B
80- pin, 150- mil wide plastic BQSO P
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
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PS8335A
10/05/00