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PI3B16215
3.3V, Hot Insertion, 20-Bit FET
BusSwitch w/Precharged Outputs
Product Features
Near Zero Propagation Delay
5Ω Switches Connect Between Two Ports
Fast Switching Speed: 4.5ns max.
Permits Hot Insertion
Isolation during Power-Off conditions
B-Port Outputs are precharged by Bias Voltage
to minimize signal distortion during live insertion
Package options include:
48-pin 150-mil wide plastic BQSOP (B)
48-pin 240-mil wide plastic TSSOP (A)
48-pin 300-mil wide plastic SSOP (V)
Product Description
Pericom Semiconductors PI3B series of logic circuits are produced
using the companys advanced 0.35 micron CMOS Technology.
The PI3B16215 provides 20-bits of high-speed bus switching. Low
on-state resistance of the switch allows connections to be made
with minimal propagation delay. The device also precharges the
B-port to a user-selectable bias voltage (BIASV) to minimize live-
insertion noise.
The device is organized as dual 10-bit bus switches with individual
output-enable (OE) inputs. When OE is LOW, the corresponding
10-bit bus switch is on and port A is connected to port B. When OE
is HIGH, the switch is open, a high-impedance state exists between
the two ports, and port B is precharged to BIASV through the
equivalent of a 10-kΩ resistor.
To ensure the high-impedance state on power up or power down,
OE should be tied to V
CC
through a pullup resistor; the minimum
value of the resistor is determined by the current-sinking capability
of the driver connected to OE.
Logic Block Diagram
1
1A1
2
SW
46
BIASV
1B1
Product Pin Configuration
BIASV
1
A
1
1
A
2
1
A
3
1
A
4
1
A
5
1
A
6
GND
1
A
7
1
A
8
1
A
9
1
A
10
2
A
1
2
A
2
V
cc
2
A
3
GND
2
A
4
2
A
5
2
A
6
2
A
7
2
A
8
2
A
9
2
A
10
48
1
47
2
46
3
45
4
44
5
43
6
42
7
8
41
9
40
48-Pin
39
10
11
A,B,V
38
12
37
13
36
14
35
15
34
16
33
17
32
18
31
19
30
20
29
21
28
22
27
23
26
24
25
1
OE
2
OE
1
B
1
1
B
2
1
B
3
1
B4
1B5
1A10
12
SW
36 1B10
1OE
2A1
48
13
35
SW
2B1
2A10
24
SW
25
2B10
2OE
47
A
B
GND
1
B
6
1
B
7
1
B
8
1
B
9
1
B
10
2
B
1
2
B
2
2
B
3
GND
2
B
4
2
B
5
2
B
6
2
B
7
2
B
8
2
B
9
2
B
10
OE
1
PS8190D
05/04/00
PERICOM [ PERICOM SEMICONDUCTOR CORPORATION ]
