21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B16862
3.3V, 20-Bit, 2-Port
NanoSwitch
Product Features
Near-zero propagation delay
5 ohms or 25 ohms switches connect inputs to outputs
Fast Switching Speed - 5ns (max.)
Direct bus connection when switches are ON
32X384 function with flow through pinout make board
layout easier
Vcc Operating Range: 3.0V to 3.6V
Industrial operating temperature: 40°C to +85°C
Packages available:
48-pin 150-mil wide plastic BQSOP (B)
48-pin 240-mil wide plastic TSSOP (A)
48-pin 300-mil wide plastic SSOP (V)
Product Description
Pericom Semiconductors PI3B series of Bus Switch circuits are
produced using the Companys advanced submicron CMOS
technology, achieving industry leading speed.
PI3B16862 is configured as a 3.3 Volt, 20-bit, hot-insertion 2-port
bus switch designed with a low ON resistance (5 ohms) allowing
inputs to be connected directly to outputs. The bus switch creates
no additional propagational delay or additional ground bounce
noise. The switch is turned ON by the Bus Enable (BEx) input signal.
Logic Block Diagram
A
0
SW
B
0
Product Pin Configuration
BE
2
A
0
A
1
A
2
A
3
A
4
A
5
A
6
A
7
A
8
A
9
GND
BE
4
A
10
A
11
A
12
A
13
A
14
A
15
A
16
A
17
A
18
A
19
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
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
V
CC
BE
1
B
0
B
1
B
2
B
3
B
4
B
5
B
6
B
7
B
8
B
9
V
CC
BE
3
B
10
B
11
B
12
B
13
B
14
B
15
B
16
B
17
B
18
B
19
A
4
SW
B
4
A
SW
BE
1
B
A
15
SW
B
15
BE
48-Pin
A, B, V
A
19
SW
B
19
BE
4
Truth Table
(1)
Function
Disconnect
Connect
Note:
1. H = High Voltage Level
L = Low Voltage Level
Hi-Z = High Impedance
BEx
H
L
A19-A0
Hi- Z
B19- B0
Product Pin Description
Pin Name
BEx
A19- A0
B19- B0
1
D e s cription
Bus Enable Inputs (Active LO W)
Bus A
Bus B
PS8200D
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B16862
3.3V, 20-Bit, 2-Port
Nano Switch
Maximum Ratings
(Above which 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 Range ....................................................... 0.5V to +4.6V
DC Input Voltage ............................................................... 0.5V to +4.6V
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 specifica-
tion 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, V
CC
= 3.0V to 3.6V)
Parame te rs
V
IH
V
IL
I
IH
I
IL
I
O ZH
V
IK
R
O N
De s cription
Input HIGH Voltage
Input LOW Voltage
Input HIGH Current
Input LOW Current
High Impedance Output Current
Clamp Diode Voltage
Switch ON Resistance
(3)
Te s t Conditions
(1)
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
V
C C
= Max., V
IN
= V
C C
0
£
A, B
£
V
C C
V
C C
= Max., V
IN
= GND
V
C C
= Min., I
IN
= 18mA
V
C C
= Min., V
IN
= 0.0V,
I
O N
= 48mA
V
C C
= Min., V
IN
= 2.4V,
I
O N
= 15mA
0.7
5
10
M in.
2.0
0.5
0.8
±1
±1
±1
1.2
8
15
V
µA
Typ.
(2)
M ax.
Units
V
W
Capacitance
(T
A
= 25°C, f = 1 MHz)
Parame te rs
(4)
C
IN
C
O FF
C
ON
D e s cription
Input Capacitance
A/B Capacitance, Switch O ff
A/B Capacitance, Switch O n
V
IN
= 0V
Te s t Conditions
Typ.
3.0
8.5
17.0
pF
Units
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at V
CC
= 3.3V, T
A
= 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.
2
PS8200D
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B16862
3.3V, 20-Bit, 2-Port
Nano Switch
Switching Characteristics over Operating Range
PI3B16862/PI3B1682612
Com.
Parame te rs
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
De s cription
Propagation Delay
(2,3)
Ax to Bx, Bx to Ax
Bus Enable Time
BEx to Ax or Bx
Bus Disable Time
BEx to Ax or Bx
Conditions
(1)
C
L
= 50pF
R
L
= 5
0
0 ohms
C
L
= 50pF,
R
L
= 500 ohms,
R = 500 ohms
1
1
M in.
M ax.
0.25
4.5
5
ns
Units
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.
Power Supply Characteristics
Parame te rs
I
CC
D e s cription
Q uiescent Power
Supply Current
Supply Current per
Input @ TTL HIGH
Supply Current per
Input per MHz
(4)
Conditions
(1)
V
CC
= Max.
V
CC
= Max.
V
CC
= Max.,
A and B Pins O pen
BE = GN D
Control Input Toggling
50% Duty Cycle
V
IN
= GN D or V
CC
V
IN
= 3.0V
(3)
M in.
Type
(2)
M ax.
10
750
0.25
µA
mA/
MHz
Units
D
I
CC
I
CCD
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.
2. Typical values are at V
CC
= 3.3V, +25°C ambient.
3. Per TTL driven input (control inputs only); A and B pins do not contribute to I
CC.
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.
3
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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B16862
3.3V, 20-Bit, 2-Port
Nano Switch
48-pin 240 Mil-Wide Thin Plastic TSSOP (A) Package
48
.236
.244
6.0
6.2
1
.488 12.4
.496 12.6
.047
1.20 Max
SEATING PLANE
.004 0.09
.008 0.20
0.45 .018
0.75 .030
.319
BSC
8.1
X.XX
X.XX
DENOTES DIMENSIONS
IN MILLIMETERS
.0197
BSC
0.50
.007
.010
0.17
0.27
.002
.006
0.05
0.15
48-pin 300 Mil-Wide Plastic SSOP (V) Package
48
.291
.299
7.39
7.59
.395
.420
10.03
10.67
Gauge Plane
.010 0.25
1
.620
.630
15.75
16.00
.02 0.51
.04 1.01
.008
0.20
Nom.
.015 0.381 x 45˚
.025 0.635
.110 2.79
Max
.025 BSC
0.635
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
.008 0.20
.0135 0.34
0-8˚
.008 0.20
.016 0.40
4
PS8200D
02/28/02
Ordering Information
Part
PI3B16862A
PI3B16862V
PI3B16862B
Pin Package
48- TSSOP (A)
48- SSOP (V)
48- SSOP (B)
40°C to +85°C
Te mpe rature
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI3B16862
3.3V, 20-Bit, 2-Port
Nano Switch
48-pin 150 Mil-Wide Plastic BQSOP (B) Package
48
.150
.157
3.80
4.00
.228
.244
5.80
6.20
Gauge Plane
.010 0.25
BSC
.386
.394
9.80
10.00
.020
.029
0.50
0.75
1
.015 0.381 x 45˚
.008 0.20
Nom
Nom
.063 1.60
.079
2.0
Max
.002 0.05
.009 0.25
.014 0.356
REF
5˚
.0157 BSC
0.40
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
.0051
.009
0.13
0.23
Applications Information
Logic Inputs
The logic control inputs can be driven up to +3.6V regardless of the
supply voltage. For example, given a +3.3V supply, IN may be driven
low to 0V and high to 3.6V. Driving IN Rail-to-Rail® minimizes power
consumption.
Power-Supply Sequencing and Hot Plug Information
Proper power-supply sequencing is recommended for all CMOS
devices. Always apply V
CC
and GND before applying signals to
input/output or control pins.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd
Pericom Semiconductor Corporation
2380 Bering Drive San Jose, CA 95131 1-800-435-2336 Fax (408) 435-1100 http://www.pericom.com
5
PS8200D
02/28/02
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