PI3B162244V [ETC]
Bus Switch ; 总线开关\n
| 型号： | PI3B162244V |
| 厂家： | 
ETC |
| 描述： | Bus Switch
|
| 文件： | 总3页 (文件大小：37K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PI3B16244
PI3B162244 (25Ω)
3.3V, Hot Insertion, 16-Bit, 4-Port BusSwitch
Product Features
Product Description
• Near-zero propagation delay
PericomSemiconductor’sPI3Bseriesoflogiccircuitsareproduced
using the Company’s advanced 0.35 micron CMOS technology.
• 5Ω switches connect inputs to outputs when enabled
•
•
•
Fast Switching Speed - 4ns max.
Permits Hot Insertion
The PI3B16244 and PI3B162244 are 16-bit, 4-port bus switches
thatarepin compatiblewiththe74series1624416-bitdriver. Four
enable signals (nBE) turn the switches on similar to the enable
signals of the 16244. The bus switches create no additional
propagation delay or ground bounce noise.
Pin compatible with 74 series16244
• Operating Vcc: 3.0V to 3.6V
• Industrial operating temperature: –40°C to +85°C
The PI3B162244 device has a built-in 25-ohm series resistor to
reduce noise because of reflections, thus eliminating the need for
an external terminating resistor.
• Packages available:
– 48-pin 240 mil wide thin plastic TSSOP (A)
– 48-pin 300 mil wide plastic SSOP (V)
Logic Block Diagram
Product Pin Configuration
1
BE
1
2
3
4
5
6
7
8
9
48
47
46
2
1
1
BE
1BE
3BE
1
B
0
1
A
A
0
1
1
B
1A
0
1
2
3
1B
1B
1B
1B
0
1
2
3
3A
0
1
2
3
3B
3B
3B
3B
0
1
2
3
GND
45 GND
1
B
2
44
43
42
41
40
1
A
A
2
3
1A
3A
1
B
3
1
V
CC
V
CC
1A
1A
3A
3A
2
B
B
0
1
2A
0
1
2
2A
GND 10
39 GND
48-Pin
A, V
2B
2B
3B
3B
2
3
0
1
11
12
13
14
38
37
36
35
2A
2A
3A
3A
2
3
0
1
2BE
4BE
2A
0
1
2
3
2B
2B
2B
2B
0
1
2
3
4A
0
1
2
3
4B
4B
4B
4B
0
1
2
3
GND 15
34 GND
3
B
B
2
3
16
17
18
19
20
33
32
31
30
29
3
A
A
2
3
2A
4A
3
3
VCC
V
CC
2A
2A
4A
4A
4
B
B
0
1
4A
0
1
4
4A
GND 21
28 GND
4
B
B
2
3
22
23
27
26
25
4
4
3
A
2
3
4
A
Truth Table(1)
Function
4BE 24
BE
nBE nA0–7
Product Pin Description
Disconnect
Connect
H
L
Hi-Z
Pin Name I/O
Description
nB0–7
nBE
I
Bus Output Enable
(Active LOW)
Note: 1. H = High Voltage Level
L = Low Voltage Level
nA0-nA7
nB0-nB7
I/O
I/O
Bus A
Bus B
Hi-Z = High Impedance
PS8170B
11/06/98
1
PI3B16244
PI3B162244 (25Ω)
3.3V, Hot Insertion, 16-Bit, 4-Port BusSwitch
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Note:
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 ...................................................................... 120 mA
Power Dissipation............................................................................. 0.5W
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 = 3.0V to 3.6V)
Parameters Description
Test Conditions(1)
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
VCC = Max., VIN = VCC
VCC = Max., VIN = GND
0 ≤ A, B ≤ VCC
Min. Typ.(2) Max. Units
VIH
VIL
IIH
Input HIGH Voltage
2.0
V
V
Input LOW Voltage
–0.5
0.8
±1
±1
±1
–1.2
8
Input HIGH Current
µA
µA
µA
V
IIL
Input LOW Current
IOZH
VIK
RON
High Impedance Output Current
Clamp Diode Voltage
Switch On Resistance(3)
VCC = Min., IIN = –18mA
VCC = Min., VIN = 0.0V,
ION = 48mA
–0.7
5
16244
162244
16244
Ω
20
20
28
10
35
40
15
48
VCC = Min., VIN = 2.4V,
ION = 15mA
Ω
162244
Capacitance (TA = 25°C, f = 1 MHz)
Parameters(4)
Description
Test Conditions
Typ. Units
CIN
Input Capacitance
VIN = 0V
VIN = 0V
VIN = 0V
3.0
COFF
CON
A/B Capacitance, Switch Off
A/B Capacitance, Switch On
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.
PS8170B
11/06/98
2
PI3B16244
PI3B162244 (25Ω)
3.3V, Hot Insertion, 16-Bit, 4-Port BusSwitch
Power Supply Characteristics
Parameters Description
Test Conditions(1)
Min. Typ(2) Max. Units
ICC
Quiescent Power
Supply Current
VCC = Max.
VIN = GND or VCC
—
—
—
10
µA
∆ICC
ICCD
Supply Current per
Input @ TTL HIGH
VCC = Max.
VIN = 3.0V(3)
—
—
750
0.25
µA
Supply Current per
Input per MHz(4)
VCC = Max.,
mA/
MHz
A and B Pins Open
Control Input Toggling
50% Duty Cycle
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.
PI3B16244 Switching Characteristics over Operating Range
Com.
Parameters Description
Conditions(1)
Min.
Max.
Units
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
Propagation Delay(2,3)
CL = 50pF 16244
RL = 500Ω 162244
CL = 50pF
RL = 500Ω,
R = 500Ω
0.25
1.25
4.5
Ax to Bx, Bx to Ax
Bus Enable Time
BE to Ax or Bx
Bus Disable Time
BE to Ax or Bx
1
1
ns
5.0
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.
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
PS8170B
11/06/98
3
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