8-Bit/ 2-Port/ Low Voltage Translator Bus SWITCH
PI3VT3245
8-Bit, 2-Port, Low Voltage Translator Bus Switch
Features
• • • • • Near-Zero propagation delay Low On-Resista...
Description
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 VCC BE B0 B1 B2 B3 B4 B5 B6 B7
A0
B0
A0 A1 A2
A7
B7
A3 A4 A5
BE
A6 A7 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 A0-A7 B0-B7 VCC GND Bus A Bus B Power Ground Description Bus Enable Input (Active Low)
1
PS8530B
08/13/04
PI3VT3245 8-Bit, 2-Port, Lo...
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