MAX3371ELT-T Просмотр технического описания (PDF) - Maxim Integrated

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MAX3371ELT-T

1µA, 2Mbps, Low-Voltage Level Translators in SC70 and µDFN

Maxim Integrated 

1µA, 2Mbps, Low-Voltage Level

Translators in SC70 and µDFN

Speed-Up

The speed-up circuit is a one-shot generator that helps

the rise time of the output waveform in the low-to-high

transition. When triggered, switches S1 and S2 turn on

for 320ns to pull up I/O VL and I/O VCC. This greatly

reduces the rise time and propagation delay for the

low-to-high transition as well as improves the duty cycle

(closer to 50% for an ideal square-wave input). See the

scope plots in the Typical Operating Characteristics for

the speed-up circuitry in operation.

Applications Information

Power-Supply Decoupling

To reduce ripple and the chance of transmitting incor-

rect data, decouple VCC and VL to ground with a 0.1µF

capacitor as close to the device as possible.

I2C Level Translation

The MAX3370/MAX3371 are ideal for level translation

between a low-voltage ASIC and an I2C device. The

devices’ bidirectional natures allow their use in the data

line of I2C communications. A typical application is

interfacing a low-voltage microprocessor to a 3V or 5V

D/A converter, such as the MAX517.

The I/O lines on the MAX3370/MAX3371 are bidirec-

tional, can be level-shifted up to +5.5V, and contain

internal 10kΩ pullup resistors to allow open-drain dri-

ving (see the Typical Operating Circuit).

Push-Pull vs. Open-Drain Driving

The MAX3370/MAX3371 I/O pins can be driven by a

push-pull or open-drain device. When using a push-pull

driver, the MAX3370/MAX3371 operate up to 2Mbps

with a 10pF load or 1Mbps with a 50pF load. The inter-

nal pullup resistors on the I/O pins allow use with open-

drain devices. The MAX3370/MAX3371 operate up to

500kbps with a 30pF load when driven by an open-

drain device.

Data rates higher than those listed in the Electrical

Characteristics table can be achieved. The maximum

data rate is limited to 3Mbps by the speed-up circuitry.

Unidirectional vs. Bidirectional Level Translator

The MAX3370/MAX3371 may also be used to translate

unidirectional signals without signal inversion. The

devices provide the smallest solution (SC70 package)

for unidirectional level translation without inversion.

PROCESS: BiCMOS

Chip Information

Package Information

For the latest package outline information and land patterns, go

to www.maxim-ic.com/packages.

PACKAGE TYPE

5 SC70

6 SC70

6 µDFN

PACKAGE CODE

X5+1

X6SN+1

L611+2

DOCUMENT NO.

21-0076

21-0077

21-0147

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