PI3B162212V [ETC]
Bus Exchanger ; 总线交换器\n
| 型号： | PI3B162212V |
| 厂家： | 
ETC |
| 描述： | Bus Exchanger
|
| 文件： | 总4页 (文件大小：160K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PI3B16212
PI3B162212 (25Ω)
3.3V, 24-Bit Bus Exchange Switch
Product Features
Product Description
• Near-zero propagation delay
Pericom Semiconductor’s PI3B series of logic circuits are produced
in the Company’s advanced 0.35 micron CMOS technology.
• 5Ω switches connect inputs to outputs
• Direct bus connection when switches are ON
• Fast Switching Speed - 5ns (max.)
• VCC Operating Range: 3.0V to 3.6V
• Industrial operating temperature: –40°C to +85°C
The PI3B16212 and PI3B162212 are 3.3 volt, 24-bit bus exchange
switches designed with a low ON resistance allowing inputs to be
connected directly to outputs. The devices operate as a 24-bit bus
switch or as a 12-bit exchanger, providing data exchange between
the four signal ports via the data select pins (S0-S2).
• Packages available:
The PI3B162212 device has a built-in 25-ohm series resistor to
reduce noise due to reflections, thus eliminating the need for an
external terminating resistor.
– 56-pin 240-mil wide thin plastic TSSOP (A)
– 56-pin 300-mil wide plastic SSOP (V)
Logic Block Diagram
Product Pin Configuration
S0
1A1
1A2
2A1
2A2
3A1
3A2
S1
1
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
ONE OF TWELVE CHANNELS
S2
2
1
B
1
1
A
1
1B1
1B2
2B1
2B2
3B1
GND
3B2
4B1
4B2
5B1
5B2
6B1
6B2
3
4
5
6
7
1B
2
1A
2
GND
4A1
4A2
5A1
5A2
6A1
6A2
8
56-PIN
A, V
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
FLOW CONTROL
S
S
S
0
1
2
7A1
7A2
7B1
7B2
8B1
GND
8B2
9B1
9B2
VCC
8A1
Truth Table
GND
8A2
Function
S2
L
S1
L
S0
L
A1
Z
A2
9A1
Disconnect
A1 to B1
Z
Z
9A2
L
L
H
L
B1
B2
Z
10A1
10A2
11A1
11A2
10B1
10B2
11B1
11B2
A1 to B2
L
H
H
L
Z
A2 to B1
L
H
L
B1
B2
Z
A2 to B2
H
H
H
H
Z
12A1
12A2
12B1
12B2
Disconnect
A1 to B1, A2 to B2
A1 to B2, A2 to B1
L
H
L
Z
H
H
B1
B2
B2
B1
H
Product Pin Description
Note:
Pin Name
S0-S2
xAx
I/O
I
Description
Select Inputs
Bus A
1. H = High Voltage Level
L = Low Voltage Level
Z = High Impedance
I/O
I/O
xBx
Bus B
PS8180A
11/09/98
1
PI3B16212/162212
3.3V, 24-Bit Bus-Exchange 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 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. Expo-
sure to absolute maximum rating conditions for extended peri-
ods may affect reliability.
DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 3.0V to 3.6V)
Parameters
Description
Input HIGH Voltage
Test Conditions(1)
Min. Typ(2) Max. Units
VIH
VIL
II
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
2.0
V
V
Input LOW Voltage
Input Current
0.5
0.8
VCC = Max., VIN = VCC or GND
VCC = 0, VIN = VCC
±1
10
µA
µA
IOZH
VIK
High Impedance Output Current
Clamp Diode Voltage
0 ≤ A, B ≥ VCC, Switches Off
VCC = Min., IIN = 18mA
0.7
5
±1
1.2
8
µA
V
RON
Switch On Resistance(3)
VCC = Min., VIN = 0.0V,
ION = 64mA
16212
162212
16212
20
20
Ω
28
10
40
15
VCC = Min., VIN = 2.4V,
ION = 15mA
Ω
162212
35
48
Capacitance (TA = 25°C, f = 1 MHz)
Parameters(4)
Description
Test Conditions
Typ.
Units
CIN
Input Capacitance
VIN = 0V
VIN = 0V
3.0
pF
pF
COFF
A/B Capacitance, Switch Off
14.0
CON
A/B Capacitance, Switch On
VIN = 0V
30.0
pF
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, 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.
PS8180A
11/09/98
2
PI3B16212/162212
3.3V, 24-Bit Bus-Exchange Switch
Power Supply Characteristics
Parameters
Description
Test Conditions(1)
Min. Typ(2) Max. Units
ICC
Quiescent Power
Supply Current
VCC = MAX.
VCC = MAX.
VIN = GND or VCC
—
—
—
—
—
—
10
µA
∆ICC
Supply Current per
Input @ TTL HIGH
VIN = 3.0 V(3)
750
0.25
µA
ICCD
Supply Current per
Input per MHz(4)
VCC = Max., VIN = 3V
A and B Pins Open
Control Input Toggling
50% Duty Cycling
mA/
MHz
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for applicable device.
2. Typical values are at Vcc = 3.3V, +25°C ambient.
3. This is the increase in supply current for each input that is at the specified TTL voltage level rather than VCC or GND.
4. Per TTL driven input (control inputs only); A and B pins do not contribute to Icc.
5. 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.
PI3B16212 Switching Characteristics over Operating Range
PI3B16212
Com.
Parameters Description
Conditions(1)
Min.
Max.
Units
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
Propagation Delay(2,3)
CL = 50pF
16212
—
—
1
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
CL = 50pF,
RL = 500Ω,
R = 500Ω
162212
ns
1
5
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.
PS8180A
11/09/98
3
PI3B16212/162212
3.3V, 24-Bit Bus-Exchange Switch
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
PS8180A
11/09/98
4
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