PI3B162245 [PERICOM]
3.3V, Hot Insertion, 16-Bit, 2-Port BusSwitch; 3.3V ，热插入， 16位， 2端口BusSwitch
| 型号： | PI3B162245 |
| 厂家： | 
PERICOM SEMICONDUCTOR CORPORATION |
| 描述： | 3.3V, Hot Insertion, 16-Bit, 2-Port BusSwitch |
| 文件： | 总3页 (文件大小：95K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PI3B16245
PI3B162245 (25Ω)
3.3V, Hot Insertion, 16-Bit, 2-Port BusSwitch
Product Description
Product Features
PericomSemiconductor’sPI3Bseriesoflogiccircuitsareproduced
using the Company’s advanced 0.35 micron CMOS technology.
• Near-zero propagation delay
• 5Ω switches connect inputs to outputs
• Fast Switching Speed - 4ns max.
• Permits Hot Insertion
ThePI3B16245andPI3B162245are3.3volt, hot-insertion, 16-bit,
2-portbusswitchesthatarepincompatiblewiththe74series16245
16-bit transceiver. Two enable signals (nBE) turn the switches on
similar to the enable signals of the 16245. The bus switches create
no additional propagational delay or additional ground bounce
noise.
•
•
Pin compatible with 74 series16245
Operating Vcc Range: 3.0V to 3.6V
• Industrial operating temperature: –40°C to +85°C
The PI3B162245 device has a built-in 25-ohm series resistor to
reduce noise resulting from 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
NC
1
2
3
4
5
6
7
8
9
48
47
46
1
1
1
BE
1
A
A
0
1
B
B
0
7
1
B
B
0
1
A
A
0
1
1
GND
45 GND
1B
2
44
43
42
41
40
1
A
A
2
3
1
7
1
1B3
1
V
CC
V
CC
1
B
4
5
1A
4
5
1B
1A
1BE
GND 10
39 GND
1
1
2
2
B
B
B
B
6
7
0
1
11
12
13
14
38
37
36
35
1
1
2
2
A
A
A
A
6
7
0
1
48-Pin
A, V
2
A
0
7
2
B
0
7
GND 15
34 GND
2B
2
3
16
17
18
19
20
33
32
31
30
29
2
A
A
2
3
2A
2
B
2B
2
V
CC
V
CC
2B
4
5
2A
4
5
2B
2A
2BE
GND 21
28 GND
2
B
B
6
7
22
23
27
26
25
2
2
2
A
6
7
2
A
Truth Table(1)
Function
NC 24
BE
nBE nA0–7
Disconnect
Connect
H
L
Hi-Z
Product Pin Description
nB0–7
Pin Name
nBE
I/O
I
Description
Bus Enable Input (Active LOW)
Note: 1. H = High Voltage Level
= Low Voltage Level
Hi-Z = High Impedance
L
nA0-nA7
nB0-nB7
I/O
I/O
Bus A
Bus B
PS8189C
09/13/99
1
PI3B16245/PI3B162245
3.3V, Hot Insertion, 16-Bit, 2-Port BusSwitch
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Storage Temperature ....................................................... –65°C to +150°C
Ambient Temperature with Power Applied ........................ –0°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
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 indi-
cated in the operational sections of this specification is not
implied. Exposure to absolute maximum rating condi-
tions for extended periods may affect reliability.
DCElectricalCharacteristics(OvertheOperatingRange,T =–40°Cto+85°C,V =3.0Vto3.6V)
A
CC
Parameters Description
TestConditions(1)
Min. Typ(2) Max. Units
V
V
Input HIGH Voltage
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
2.0
–0.5
—
—
—
—
—
—
–0.7
5
—
0.8
±1
±1
±1
–1.2
8
V
V
IH
IL
Input LOW Voltage
I
I
I
Input HIGH Current
V
V
= Max., V = VCC
µA
µA
µA
V
IH
CC
CC
IN
Input LOW Current
= Max., V = GND
—
IL
IN
High Impedance Output Current
0 ≤ A, B ≤ V
—
OZH
CC
V
R
Clamp Diode Voltage
V
V
= Min., I = –18mA
—
IK
CC
CC
IN
(3)
Switch On Resistance
= Min., V = 0.0V,
16245
162245
16245
—
Ω
ON
IN
I
= 48mA
20
28
10
35
40
15
48
ON
V
= Min., V = 2.4V,
—
Ω
CC
IN
I
= 15mA
162245
20
ON
Capacitance(T =25°C,f=1MHz)
A
(4)
Parameters
Description
Test Conditions
Typ
Units
C
C
Input Capacitance
V
V
= 0V
= 0V
3.0
8.5
pF
pF
IN
IN
A/BCapacitance, SwitchOff
OFF
IN
C
ON
A/B Capacitance, Switch On
V
IN
= 0V
17.0
pF
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.
2. TypicalvaluesareatV =3.3V,T =25°Cambientandmaximumloading.
CC
A
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.
PS8189C
09/13/99
2
PI3B16245/PI3B162245
3.3V, Hot Insertion, 16-Bit, 2-Port BusSwitch
PowerSupplyCharacteristics
(1)
(2)
Parameters Description
TestConditions
Min. Typ
Max.
Units
I
Quiescent Power
Supply Current
V
V
V
=Max.
=Max.
V
=GNDorV
CC
10
µA
CC
CC
IN
IN
(3)
∆I
Supply Current per
Input@TTLHIGH
V
=3.0V
750
µA
CC
CC
I
Supply Current per
Max
CC= .
CCD
0.25
mA/
MHz
(4)
Input per MHz
A and B Pins Open
BE=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 =3.3V,+25°Cambient.
CC
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.
Switching Characteristics over Operating Range
Com.
Parameters Description
Conditions(1)
Propagation Delay(2,3) CL = 50pF 16245
Min.
Max.
Units
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
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
RL = 500Ω 162245
CL = 50pF, RL= 500Ω
1
ns
CL = 50pF, RL= 500Ω
1
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.
OrderingInformation
Part
Pin Package
48-TSSOP (A48)
48-SSOP (V48)
Temperature
-40°C to +85°C
-40°C to +85°C
PI3B16245A
PI3B16245V
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
PS8189C
09/13/99
3
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