PI5C162245A [ETC]
Bus Switch ; 总线开关\n
| 型号： | PI5C162245A |
| 厂家： | 
ETC |
| 描述： | Bus Switch
|
| 文件： | 总5页 (文件大小：247K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PI5C16245
PI5C162245 (25Ω)
16-Bit, 2-Port Bus Switch
ProductFeatures
ProductDescription
PericomSemiconductorsPI5Cseriesoflogiccircuitsareproduced
using the Companys advanced 0.6 micron CMOS technology.
Near-zero propagation delay
5Ω switches connect inputs to outputs
• Direct bus connection when switches are ON
The PI5C16245 and PI5C162245 are 16-bit, 2-port bus switches
that are pin compatible with the 74 series 16245 16-bit transceiver.
Twoenablesignals(nBE)turntheswitcheson, similartotheenable
signals of the 16245. The bus switch creates no additional
propagational delay or additional ground bounce noise.
Ultra-lowquiescentpower(0.2µAtypical)
Ideally suited for notebook applications
Pincompatiblewith74series16245
Industrialoperatingtemperature:40°Cto+85°C
ThePI5C162245devicehasabuilt-in25-ohmseriesresistortoreduce
reflectionnoise,thuseliminatingtheneedforanexternalterminating
resistor.
Packagesavailable:
48-pin240milwidethinplasticTSSOP(A)
48-pin150milwideplasticBQSOP(B)
48-pin300milwideplasticSSOP(V)
ProductPinConfiguration
LogicBlockDiagram
NC
1B0
1
2
3
4
5
6
7
8
9
48
47
46
1BE
1A0
1A1
1
A
0
7
1
B
0
7
1B1
GND
1B2
45 GND
44
43
42
41
40
1A2
1A3
VCC
1A4
1A5
1A
1B
1B3
VCC
1B4
1BE
1B5
GND 10
39 GND
1B6
1B7
2B0
2B1
11
38
1A6
1A7
2A0
2A1
12 48-Pin 37
2
A
0
7
2
B
0
A,B,V
13
14
36
35
GND 15
34 GND
2B2
2B3
VCC
2B4
2B5
16
17
18
19
20
33
32
31
30
29
2A2
2A3
VCC
2A4
2A5
2A
2B
7
2BE
GND 21
28 GND
2B6
2B7
22
23
27
26
25
2A6
2A7
2BE
TruthTable(1)
NC 24
Function
nBE
H
nA0-7
Hi-Z
Disconnect
Connect
ProductPinDescription
L
nB0-7
PinName
nBE
nA0-nA7
nB0-nB7
I/O
I
I/O
I/O
Description
Bus Enable Input (Active LOW)
Bus A
Bus B
Note: 1. H = High Voltage Level
= Low Voltage Level
Hi-Z = High Impedance
L
PS7025B 06/21/00
1
PI5C16245/162245
16-Bit,2-PortBusSwitch
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Note:
StorageTemperature .................................................................... –65°Cto+150°C
Ambient Temperature with Power Applied ....................................–40°Cto+85°C
Supply Voltage to Ground Potential (Inputs & VCC Only) .............. –0.5Vto+7.0V
Supply Voltage to Ground Potential (Outputs & D/O Only) ........... –0.5Vto+7.0V
DC Input Voltage ............................................................................ –0.5Vto+7.0V
DC Output Current ...................................................................................... 120mA
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
affectreliability.
DCElectricalCharacteristics(Over OperatingRange, TA = –40°Cto+85°C, VCC =5V±10%)
(1)
(2)
Parameters Description
TestConditions
Min. Typ
Max.
—
0.8
±1
±1
±1
–1.2
—
—
7
Units
V
V
IH
InputHIGHVoltage
GuaranteedLogicHIGHLevel
GuaranteedLogicLOWLevel
2.0
–0.5
—
—
—
—
100
—
—
20
—
V
IL
Input LOW Voltage
—
—
—
—
–0.7
—
150
5
V
I
I
I
InputHIGHCurrent
V
=Max.,VIN =VCC
=Max.,VIN =GND
µA
µA
µA
V
IH
CC
CC
Input LOW Current
V
IL
High Impedance Output Current
ClampDiodeVoltage
0 ≤ A, B ≤ VCC
V =Min.,IIN = –18mA
CC
OZH
V
IK
(3)
I
OS
Short Circuit Current
A(B)=0V,B(A)=V
mA
mV
Ω
CC
V
H
Input Hysteresis at Control Pins
(4)
R
ON
Switch On Resistance
V
=Min.,VIN =0.0V,
16245
162245
16245
CC
ION = 48mA
=Min.,VIN =2.4V,
28
40
V
—
20
10
15
Ω
CC
ION = 15mA
162245
35
48
Capacitance(TA =25°C,f=1MHz)
(5)
Parameters
Description
TestConditions
Typ
Max.
Units
CIN
Input Capacitance
VIN =0V
VIN =0V
—
—
6
6
pF
pF
COFF
A/BCapacitance, SwitchOff
CON
A/B Capacitance, Switch On
VIN =0V
—
8
pF
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.
2. TypicalvaluesareatV =5.0V, TA =25°Cambientandmaximumloading.
CC
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 pins 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.
PS7025B 06/21/00
2
PI5C16245/162245
16-Bit,2-PortBusSwitch
PowerSupplyCharacteristics
(1)
TestConditions
(2)
Parameters Description
Min. Typ
Max.
Units
I
Quiescent Power
Supply Current
V
V
V
=Max.
=Max.
=Max.,
V
=GNDorV
(3)
—
—
—
0.1
—
—
3.0
µA
CC
CC
CC
CC
IN
CC
∆I
Supply Current per
Input@TTLHIGH
V =3.4V
IN
2.5
mA
CC
I
Supply Current per
0.25
mA/
MHz
CCD
(4)
Input per MHz
A and B Pins Open
nBE=GND
Control Input Toggling
50%DutyCycle
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.
2. TypicalvaluesareatV =5.0V,+25°Cambient.
CC
3. Per TTL driven input (V = 3.4V, control inputs only); A and B pins do not contribute to I
.
IN
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.
PI5C16245SwitchingCharacteristicsoverOperatingRange
PI5C16245
Com.
Parameters
Description
Conditions
Min.
Max.
Units
tPLH
tPHL
Propagation Delay (2,3)
xAx to xBx, xBx to xAx, RL = 500Ω
CL = 50pF
0.25
tPZH
tPZL
Bus Enable TIme
xBE to xAx or xBx,
1.5
1.5
6.5
5.5
ns
tPHZ
tPLZ
Bus Disable TIme
xBE to xAx or xBx,
PI5C162245 Switching Characteristics over Operating Range
PI5C162245
Com.
Parameters
Description
Conditions
C = 50pF
Min.
Max.
Units
(2,3)
t
Propagation Delay
xAx to xBx, xBx to xAx, R = 500Ω
PLH
L
1.25
t
PHL
L
t
t
Bus Enable TIme
xBE to xAx or xBx,
PZH
1.5
1.5
6.5
5.5
ns
PZL
t
Bus Disable TIme
xBE to xAx or xBx,
PHZ
t
PLZ
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.
PS7025B 06/21/00
3
PI5C16245/162245
16-Bit,2-PortBusSwitch
Applications Information
LogicInputs
The logic enable inputs can be driven up to +5.5V regardless of the supply voltage. For example, given a +5.0V
supply, the enable pins(s) may be driven low to 0V and high to 5.5V. Driving the enable pin(s) Rail-to-Rail R
minimizespowerconsumption.
Power-SupplySequencing
Proper power-supply sequencing is recommended for all CMOS devices. Always apply Vcc before applying
signals to the input/output or control pins.
Rail-to-Rail is a registered trademark of Nippon Motorola.
OrderingInformation
Part
Pin Package
48-TSSOP (A)
48-BQSOP (B)
48-SSOP (V)
Temperature
PI5C16245A
PI5C16245B
PI5C16245V
-40°C to +85°C
48-Pin TSSOP (240 Mil Wide) - Package Code: A
48
.236
.244
6.0
6.2
1
.488 12.4
.496 12.6
.047
SEATING PLANE
1.20 Max
0.09
0.20
.004
.008
0.45 .018
0.75 .030
.002
.006
0.05
0.15
.007
.010
.0197
BSC
.319
BSC
8.1
0.50
0.17
0.27
X.XX
X.XX
DENOTES DIMENSIONS
IN MILLIMETERS
PS7025B 06/21/00
4
PI5C16245/162245
16-Bit,2-PortBusSwitch
48-Pin BQSOP (150 Mil Wide) - Package Code: B
48
.150
.157
.228
.244
3.80
4.00
5.80
6.20
Gauge Plane
.010 0.25
.020
.029
0.50
0.75
BSC
1
.386
.394
9.80
10.00
.015 0.381
x 45˚
REF
.014 0.356
.008 0.20 Nom
Nom
1.60
.063
.079
2.0
Max
.002 0.05
.009 0.25
.0157 BSC
0.40
5˚
.0051
.009
0.13
0.23
X.XX
X.XX
DENOTES DIMENSIONS
IN MILLIMETERS
48-Pin SSOP (300 Mil Wide) - Package Code: V
48
.395
.420
10.03
10.67
.291
.299
7.39
7.59
Gauge Plane
.010
0.25
.02 0.51
.04 1.01
1
0.381
0.635
.015
.025
x 45˚
.008
0.20
Nom.
.620
.630
15.75
16.00
.110 2.79 Max
.008 0.20
.016 0.40
0-8˚
.008 0.20
.0135 0.34
.025 BSC
0.635
X.XX
X.XX
DENOTES DIMENSIONS
IN MILLIMETERS
Pericom Semiconductor Corporation
2380BeringDrive • SanJose,CA95131•1-800-435-2336 • Fax(408)435-1100• http://www.pericom.com
PS7025B 06/21/00
5
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