PI5C162214A [ETC]
Bus Exchanger ; 总线交换器\n
| 型号： | PI5C162214A |
| 厂家： | 
ETC |
| 描述： | Bus Exchanger
|
| 文件： | 总3页 (文件大小：235K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PI5C16214
PI5C162214 (25ohm)
12-Bit, 3-To-1 Bus-Select Switch
Features
Product Description
Near-zero propagation delay
5ohm switches connect inputs to outputs
Direct bus connection when switches are ON
Pericom Semiconductors PI5C series of BusSwitch circuits
are produced in the Companys advanced submicron CMOS
technology, achieving industry leading speed.
The PI5C16214 and PI5C162214 are 3-to-1 bus-select switches
designed with a low ON resistance (5ohm) allowing inputs to be
connected directly to outputs. These devices operate as 12-bit bus
switches via the data select pins (S0-S2).
Ultra-lowquiescentpower(0.2µAtypical)
ideally suited for notebook applications
Industrial operating temperature: 40°C to +85°C
Packages available:
The PI5C162214 device has a built-in 25-ohm series resistor to
reduce noise resulting from reflections, thus eliminating the need
for an external terminating resistor.
56-pin 240-mil wide plastic TSSOP (A)
56-pin 300-mil wide plastic SSOP (V)
Product Pin Configuration
Logic Block Diagram
56-Pin
A, V
Truth Table(1)
Function
S2
S1
S0
A1
Disconnect
A1 to B1
A1 to B2
Disconnect
Disconnect
A1 to B3
L
L
L
L
L
H
H
L
L
H
H
L
H
L
H
L
H
L
H
Z
B1
B2
Z
L
H
H
H
H
Z
B3
B1
B2
A1 to B1
A1 to B2
Note:
1. H = High Voltage Level
L = Low Voltage Level
Z = High Impedance
Product Pin Description
Pin Name
I/O
Description
SO-S2
xAx
xBx
I
Select Inputs
Bus A
Bus B
I/O
I/O
PS7040A
04/23/99
1
PI5C16214/162214
3-to-1 Bus-Select Switch
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 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
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 con-
ditions above those indicated in the operational sec-
tions 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 = 4 to 5V)
Parameters Description
TestConditions(1)
Min.
2.0
0.5
Typ(2) Max.
Units
V
VIH
VIL
II
InputHIGHVoltage
GuaranteedLogicHIGHLevel
GuaranteedLogicLOWLevel
VCC =5.5V.,VIN=5.5VorGND
VCC =0V,VIN =VCC
1.2
150
5
0.8
±1
±1
10
V
Input LOW Voltage
Input Current
V
µA
µA
µA
IOZH
VIK
IOS
High Impedance Output Current
ClampDiodeVoltage
Short Circuit Current(3)
0≤A,B≤VCC
VCC =4.5V,IIN = 18mA
A(B)=0V,B(A)=VCC
0.7
100
7
mA
mV
VH
Input Hysteresis at Control Pins
Switch On Resistance(4)
RON
VCC =4.5V,VIN = 0.0V,
ION =30mA,64mA
VCC =4.5V,VIN = 2.4V,
ION = 15mA
16214
162214
16214
ohm
20
28
40
15
48
20
35
ohm
ohm
162214
16214
20
VCC =4V,VIN = 2.4V,
ION =15mA
14
Capacitance (TA = 25°C, f = 1 MHz)
Parameters(5)
Description
Test Conditions
Typ
Units
CIN
Input Capacitance
VIN = 0V or 3V
VIN = 0V or 3V
4.5
5.5
pF
pF
COFF
A/B Capacitance, Switch Off
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 = 5.0V, 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 resis-
tance 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.
PS7040A
04/23/99
2
PI5C16214/162214
3-to-1 Bus-Select Switch
Power Supply Characteristics
Parameters Description
Test Conditions(1)
Min. Typ(2) Max. Units
ICC
Quiescent Power
Supply Current
VCC = Max.
VIN = GND or VCC
0.1
10
µA
∆ICC
ICCD
Supply Current per
Input @ TTL HIGH
VCC = Max.
VIN = 3.4V(3)
2.5
mA
Supply Current per
Input per MHz(4)
VCC = Max.,
0.25
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 = 5.0V, +25°C ambient.
3. Per TTL driven input (VIN = 3.4V, 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.
PI5C16214 Switching Characteristics over Operating Range
PI5C16214
Vcc = 5V ±0.5V
Parameters Description
Conditions(1)
Min.
Max.
Units
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
Propagation Delay(2,3)
CL = 50pF
RL = 500ohm
0.25
Ax to Bx, Bx to Ax
Bus Enable Time
XOE to Ax or Bx
Bus Disable Time
XOE to Ax or Bx
1.5
1.5
6.5
5.5
ns
PI5C162214 Switching Characteristics over Operating Range
PI5C162214
Vcc = 5V ±0.5V
Parameters Description
Conditions(1)
Min.
Max.
Units
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
Propagation Delay(2,3)
CL = 50pF
RL = 500ohm
1.25
Ax to Bx, Bx to Ax
Bus Enable Time
XOE to Ax or Bx
Bus Disable Time
XOE to Ax or Bx
1.5
1.5
6.5
5.5
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.
Pericom Semiconductor Corporation
2380 Bering Drive San Jose, CA 95131 1-800-435-2336 Fax (408) 435-1100 http://www.pericom.com
PS7040A
04/23/99
3
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