1
PS8369B 12/15/01
1
1
2
3
4
5
6
7
GND 8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
1
A
12
A
BIASV
1
A
1 5
A
1
A
17
A
1
A
8
19
A
110
A
21
A
22
A
V
CC
2 3
A
2 4
A
2 5
A
2 6
A
2 7
A
2 8
A
2 9
A
2 10
A
1
B
5
1
B
1
1
O
E
12
B
13
B
1
B
4
GND
1
B
6
17
B
18
B
1
B
9
1
B
10
GND
22
B
21
B
2 3
B
GND
2 4
B
2
B
5
2 6
B
2
B
7
2
B
8
2 9
B
2
B
10
2
O
E
1
A
3
4
6
Product Description
Pericom Semiconductors PI5C series of logic circuits are produced
using the companys advanced submicron CMOS technology.
The PI5C16215C provides 20-bits of high-speed bus switching. The
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 incorporates an internal charge pump
to handle input undershoot of up to 1.5V and 25ns width.
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-k ohm 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.
Product Features
Undershoot protection up to 1.5V, 25ns width
Near zero propagation delay
5 Ohm 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)
Product Pin Configuration
Logic Block Diagram
PI5C16215C
20-Bit, Hot Insertion, BusSwitch with
Precharged Outputs & Undershoot Protection
1A10
1A1
1OE
2A1
2OE
2A10
24
13
47
48
12
2
46
36
35
25
1
BIASV
1B1
1B10
2B1
2B10
SW
SW
SW
SW
BA
OE
48-Pin
A,B
