PI3VT3245
8-Bit, 2-Port, Low Voltage
Translator Bus Switch
Features
•
•
•
•
•
Near-Zero propagation delay
Low On-Resistance switches connect inputs to outputs
2.5V to 3.3V Supply voltage operation
2.5V or 1.8V switching
Packaging (Pb-free & Green available):
– 20-pin, 150-mil wide plastic QSOP (Q)
– 20-pin, 173-mil wide plastic TSSOP (L)
Description
Pericom Semiconductor’s PI3VT series of logic circuits are produced
using the Company’s advanced submicron CMOS technology,
achieving industry leading performance.
The PI3VT3245 is a 2.5V or 3.3V 8-bit, 2-port bus switch
designed with a low On-Resistance (5Ω). The switches are turned
ON or enabled by the Bus Enable (BE) input signal.
Given a 3.3V supply and an input voltage of 3.3V, the switch
translates to an output voltage of 2.5V. Similarly, when operated
with a 2.5V supply and given 2.5V inputs, the device translates
the outputs to 1.8V.
Applications
• 3.3V to 2.5V level shifting (voltage translation)
• 2.5V to 1.8V level shifting (voltage translation)
Block Diagram
Pin Configuration
NC
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
CC
BE
B
0
B
1
B
2
B
3
B
4
B
5
B
6
B
7
A
0
B
0
A
0
A
1
A
2
A
7
B
7
A
3
A
4
A
5
BE
A
6
A
7
GND
Truth Table
(1)
Function
Disconnect
Connect
Notes:
1. H = High Voltage Level
L = Low Voltage Level
Hi-Z = High Impedance
BE
H
L
A0-7
Hi-Z
B0-7
Pin Description
Pin Name
BE
A
0
-A
7
B
0
-B
7
V
CC
GND
Bus A
Bus B
Power
Ground
Description
Bus Enable Input (Active Low)
1
PS8530B
08/13/04
PERICOM [ PERICOM SEMICONDUCTOR CORPORATION ]
