PI3B16215 Datasheet, PDF (1/5 Pages) Pericom Semiconductor Corporation – 3.3V, Hot Insertion, 20-Bit FET BusSwitch w/Precharged Outputs

PI3B16215
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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)
Logic Block Diagram
1A1 ²
SW
1 _BIASV
46 _1B1
Product Description
Pericom Semiconductor’s PI3B series of logic circuits are produced
using the company’s 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.
Product Pin Configuration
1A10 ¹²
SW
1OE ⁴⁸
2A1 ¹³
SW
2A10 ²⁴
SW
2OE ⁴⁷
A
36 _1B10
35 _2B1
25 _2B10
B
BIASV
1A1
1A2
1A3
1A4
1A 5
1A 6
GND
1A7
1A8
1A9
1A10
2 A1
2A 2
V_{c c}
2A3
GND
2A4
2A5
2A6
2A7
2A8
2A9
2A 10
1
48
2
47
3
46
4
45
5
44
6
43
7
42
8
41
9
40
10 ^48-Pin 39
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
1OE
2OE
1B1
1B2
1B3
1B4
1B5
GND
1B6
1B7
1B8
1B9
1B10
2 B1
2B2
2 B3
GND
2B4
2B5
2B6
2B7
2B8
2B9
2B10
OE
1
PS8190D
05/04/00