Rainbow-electronics MAX3022 Manual de usuario descargar pdf (Pagina 12)

MAX3013–MAX3022

+1.2V to +3.6V, 0.1µA, 100Mbps,

8-Channel Level Translators

12 ______________________________________________________________________________________

Enable Input (EN)

The MAX3013–MAX3022 feature an EN input. Pull EN

low to set the MAX3013–MAX3022’s I/O on both sides

in tristate output mode. Drive EN to logic high (V

) for

normal operation.

Applications Information

Power-Supply Decoupling

To reduce ripple and the chance of introducing data

errors, bypass V

and V

to ground with a 0.1µF

ceramic capacitor. Place the bypass capacitors as

close to the power-supply input pins as possible.

8-Bit Bus Translation

The MAX3013–MAX3022 level-shift the data present on

the I/O line between +1.2V to +3.6V, making them ideal

for level translation between a low-voltage ASIC and a

higher voltage system. The Typical Operating Circuit

shows the MAX3013 bidirectional translator in an 8-bit

bus level translation from a 1.8V system to a 3.3V sys-

tem and vice versa.

Unidirectional vs. Bidirectional Level

Translator

The MAX3013 bidirectional translator can operate as a

unidirectional device to translate signals without inver-

sion. The MAX3014–MAX3022 unidirectional translators

level-shift data in one direction (V

→ V

or V

→ V

)

on any single data line (see the Ordering Information).

These devices provide the smallest solution (UCSP pack-

age) for unidirectional level translation without inversion.

TH_IN

-(V

- V

TH_IN

)/R

TH_IN

= 4kΩ WHEN DRIVING V

SIDE.

= 150Ω WHEN DRIVING V

SIDE.

WHERE V

= V

OR V

Figure 6. Typical I

vs. V

MAX3013

+1.8V

+3.3V

+1.8V

SYSTEM

CONTROLLER

+3.3V

SYSTEM

GND

BIT 1

BIT 2

BIT 0

BIT 3

BIT 4

BIT 5

BIT 6

BIT 7

BIT 1

BIT 2

BIT 0

BIT 3

BIT 4

BIT 5

BIT 6

BIT 7

I/O V

4I/O V

I/O V

0.1µF0.1µF

I/O V

6I/O V

I/O V

8I/O V

I/O V

Typical Operating Circuit

Chip Information

TRANSISTOR COUNT: 1447

PROCESS: BiCMOS

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 21 22

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Rainbow-electronics MAX3022 Manual de usuario Pagina 12

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