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PI3B16215
3.3V, Hot Insertion, 20-Bit FET
Bus Switch w/Precharged Outputs
Product Features
聲 Near Zero Propagation Delay
聲 5-ohm Switches Connect Between Two Ports
聲 Fast Switching Speed: 4.5ns max.
聲 Permits Hot Insertion
聲 Isolation during Power-Off conditions
聲 B-Port Outputs are precharged by Bias Voltage
to minimize signal distortion during live insertion
聲 Package options include:
聳 48-pin 150-mil wide plastic BQSOP (B)
聳 48-pin 240-mil wide plastic TSSOP (A)
聳 48-pin 300-mil wide plastic SSOP (V)
Product Description
Pericom Semiconductor聮s PI3B series of logic circuits are produced
using the company聮s advanced submicron CMOS Technology.
The PI3B16215 provides 20-bits of high-speed bus switching. The
switches low ON-state resistance allows connections to be made
with minimal propagation delay 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-kohm 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
46
BIASV
1B1
Product Pin Configuration
BIASV
1A1
1A2
1A3
SW
1A10
12
SW
36 1B10
1A4
1A5
1A6
1OE
48
GND
1A7
1A8
2A1
13
SW
35
2B1
1A9
1A10
2A1
2A2
V
CC
2A3
GND
2A4
2A5
2A6
2A7
2A8
2A9
2A10
2A10
24
SW
25
2B10
2OE
47
A
B
48
1
2
47
3
46
4
45
5
44
6
43
7
42
8
41
9
40
48-Pin
10
A,B,V
39
11
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
25
24
1OE
2OE
1B1
1B2
1B3
1B4
1B5
GND
1B6
1B7
1B8
1B9
1B10
2B1
2B2
2B3
GND
2B4
2B5
2B6
2B7
2B8
2B9
2B10
OE
1
PS8190D
08/22/01
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