ETC PI3B16861

PI3B16861
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3.3V, 20-Bit, 2-Port NanoSwitch™
Product Features
Product Description
•
•
•
•
•
Pericom Semiconductor’s PI3B series of Bus Switch circuits are
produced using the Company’s advanced submicron CMOS
technology, achieving industry leading speed.
The PI3B16861 is configured as a 3.3 volt, hot-insertion, 20-bit,
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.
Near-zero propagation delay
5 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 240-mil wide plastic TSSOP (A)
– 48-pin 300-mil wide plastic SSOP (V)
– 48-pin 150-mil wide plastic BQSOP (B)
Product Pin Configuration
Logic Block Diagram
A0
B0
SW
SW
A9
B9
BE1
SW
A
A10
B10
SW
SW
A19
B
BE
B19
BE2
Truth Table(1)
Function
BEx
A19-A0
Disconnect
H
Hi- Z
Connect
L
B19- B0
Note:
1. H = High Voltage Level
L = Low Voltage Level
Hi-Z = High Impedance
NC
1
48
VCC
A0
2
47
BE1
A1
3
46
B0
A2
4
45
B1
A3
5
44
B2
A4
6
43
B3
A5
7
42
B4
A6
8
41
B5
A7
9
40
B6
A8
10
39
B7
A9
11
38
B8
GND
12
37
B9
NC
13
36
VCC
A10
14
35
BE2
A11
15
34
B10
A12
16
33
B11
A13
17
32
B12
A14
18
31
B13
A15
19
30
B14
A16
20
29
B15
A17
21
28
B16
A18
22
27
B17
A19
23
26
B18
NC
24
25
B19
48-Pin
A, B, V
Product Pin Description
Pin Name
BEx
1
D e s cription
Bus Enable Inputs (Active LO W)
A19- A0
Bus A
B19- B0
Bus B
PS8175C
03/01/02
PI3B16861
3.3V,
20-Bit,
2-Port
NanoSwitch™
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Maximum Ratings
(Above which 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.
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
DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 3.0V to 3.6V)
Parame te rs
Te s t Conditions (1)
De s cription
M in.
Typ.(2)
M ax.
VIH
Input HIGH Voltage
Guaranteed Logic HIGH Level
2.0
VIL
Input LOW Voltage
Guaranteed Logic LOW Level
–0.5
IIH
Input HIGH Current
VC C = Max., VIN = VC C
±1
IIL
Input LOW Current
VC C = Max., VIN = GND
±1
V
0.8
IO ZH
High Impedance Output Current
0 £ A, B £ VC C
VIK
Clamp Diode Voltage
VC C = Min., IIN = –18mA
–0.7
–1.2
VC C = Min., VIN = 0.0V,
IO N = 48mA
5
8
VC C = Min., VIN = 2.4V,
IO N = 15mA
10
15
RO N
Switch ON
Resistance(3)
Units
µA
±1
V
W
Capacitance (TA = 25°C, f = 1 MHz)
Parame te rs (4)
D e s cription
CIN
Input Capacitance
C O FF
A/B Capacitance, Switch O ff
CON
A/B Capacitance, Switch O n
Te s t Conditions
Typ.
Units
3.0
VIN = 0V
8.5
pF
17.0
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.
2
PS8175C
03/01/02
PI3B16861
3.3V,
20-Bit,
2-Port
NanoSwitch™
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Switching Characteristics over Operating Range
PI3B16861
Com.
Parame te rs
Conditions (1)
De s cription
tPLH
tPHL
Propagation Delay(2,3)
Ax to Bx, Bx to Ax
CL = 50pF
RL = 500 ohms
tPZH
tPZL
Bus Enable Time
BEx to Ax or Bx
tPHZ
tPLZ
Bus Disable Time
BEx to Ax or Bx
CL = 50pF,
RL = 500 ohms,
R = 500 ohms
M in.
M ax.
Units
0.25
1
4.5
1
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.
Power Supply Characteristics
Parame te rs
D e s cription
Conditions (1)
M in.
Type (2)
M ax.
Q uiescent Power
Supply Current
VCC = Max.
VIN = GN D or VCC
—
—
10
DICC
Supply Current per
Input @ TTL HIGH
VCC = Max.
VIN = 3.0V(3)
—
—
750
ICCD
Supply Current per
Input per MHz(4)
VCC = Max.,
A and B Pins O pen
BE = GN D
Control Input Toggling
50% Duty Cycle
—
—
0.25
ICC
Units
µA
mA/
MHz
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.
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
PS8175C
03/01/02
PI3B16861
3.3V,
20-Bit,
2-Port
NanoSwitch™
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48-pin 240 Mil-Wide Thin Plastic TSSOP (A) Package
48
.236
.244
1
6.0
6.2
.488 12.4
.496 12.6
.047
1.20 Max
SEATING PLANE
.004 0.09
.008 0.20
X.XX
X.XX
DENOTES DIMENSIONS
IN MILLIMETERS
.0197
BSC
0.50
0.45 .018
0.75 .030
.002
.006
0.05
0.15
.007
.010
0.17
0.27
.319
BSC
8.1
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
.02 0.51
.04 1.01
1
.620
.630
15.75
16.00
.015 0.381 x 45˚
.025 0.635
.008
0.20
Nom.
.110 2.79 Max
.025 BSC
0.635
.008 0.20
.0135 0.34
0-8˚
.008 0.20
.016 0.40
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
4
PS8175C
03/01/02
PI3B16861
3.3V,
20-Bit,
2-Port
NanoSwitch™
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48-pin 150 Mil-Wide Plastic BQSOP (B) Package
48
.150
.157
3.80
4.00
.228
.244
5.80
6.20
Gauge Plane
.020
.029
0.50
0.75
.010 0.25
BSC
1
.014 0.356 REF
.386
.394
9.80
10.00
.015 0.381 x 45˚
.008 0.20 Nom
Nom
.063 1.60
5˚
.0157 BSC
0.40
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
.0051
.009
0.13
0.23
.079
2.0 Max
.002 0.05
.009 0.25
Ordering Information
Part
Pin Package
PI3B16861A
48- TSSOP (A)
PI3B16861V
48- SSOP (V)
PI3B16861B
48- SSOP (B)
Te mpe rature
–40°C to +85°C
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 VCC 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
PS8175C
03/01/02