PI3B16244AE(2004) Просмотр технического описания (PDF) - Pericom Semiconductor
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PI3B16244AE Datasheet PDF : 3 Pages
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3.3V, 16-Bit, 4-Port NanoSwitch™
Features
• Near-Zero propagation delay
• 5-ohm switches connect inputs to outputs when enabled
• Fast Switching Speed - 4ns max.
• Pin compatible with 74 series 16244
• Operating Vcc: 3.0V to 3.6V
• Industrial operating temperature: –40°C to +85°C
• Packaging (Pb-free & Green available):
– 48-pin 240 mil wide thin plastic TSSOP (A)
– 48-pin 300 mil wide plastic SSOP (V)
Description
Pericom Semiconductor’s PI3B16244 is a 16-bit, 4-port bus switch
that is pin compatible with the 74 series 16244 16-bit driver. Four
enable signals (nBE) turn the switch on similar to the enable signals
of the 16244. The bus switch creates no additional propagation
delay or ground bounce noise.
Block Diagram
1BE
3BE
1A0
SW
1B0 3A0
1A1
SW
1B1 3A1
1A2
SW
1B0 3A2
1A3
SW
1B1 3A3
2BE
2A0
2A1
2A2
2A3
4BE
SW
2B0 4A0
SW
2B1 4A1
SW
2B2 4A2
SW
2B3 4A3
Truth Table(1)
Function
nBE
Disconnect
H
Connect
L
Note:
1. H = High Voltage Level
L = Low Voltage Level
Hi-Z = High Impedance
Pin Configuration
SW
3B0
SW
3B1
SW
3B0
SW
SW
3B1
A
B
SW
4B0
BE
SW
4B1
SW
4B2
SW
4B3
nA0-7
Hi-Z
nB0-7
Pin Description
Pin Name
I/O
nBE
I
nA0-nA7
I/O
nB0-nB7
I/O
1BE 1
1B0 2
1B1 3
GND 4
1B2 5
1B3 6
VCC 7
2B0 8
2B1 9
GND 10
2B2 11
2B3 12
3B0 13
3B1 14
GND 15
3B2 16
3B3 17
VCC 18
4B0 19
4B1 20
GND 21
4B2 22
4B3 23
4BE 24
48 2BE
47 1A0
46 1A1
45 GND
44 1A2
43 1A3
42 VCC
41 2A0
40 2A1
39 GND
38 2A2
37 2A3
36 3A0
35 3A1
34 GND
33 3A2
32 3A3
31 VCC
30 4A0
29 4A1
28 GND
27 4A2
26 4A3
25 3BE
Description
Bus Output Enable (Active Low)
Bus A
Bus B
1
PS8170D
10/01/04
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