MAX14595EWA datasheet(9/11 Pages) MAXIM

Part #	MAX14595EWA

Description	Low-Power Dual-Channel Logic-Level Translator

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Manufacturer	MAXIM [Maxim Integrated Products]

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MAX14595

Low-Power Dual-Channel Logic-Level Translator

9

Maxim Integrated

Block Diagram

Detailed Description

The MAX14595 is a dual-channel, bidirectional level trans-

lator. The device translates low voltage down to +0.9V on

the VL side to high voltage on the VCC side and vice-ver-

sa. The device is optimized for open-drain and high-speed

operation, such as I2C bus and MDIO bus.

The device has low on-resistance (17I max), which

is important for high-speed, open-drain operation. The

device also features internal pullup resistors that are

active when the corresponding power is on and TS is high.

Level Translation

For proper operation, ensure that +1.65V P VCC P +5.5V,

and +0.9V P VL P VCC. When power is supplied to VL

while VCC is less than VL, the device automatically

disables logic-level translation function. Also, the device

enters shutdown mode when TS = GND.

High-Speed Operation

The device meets the requirements of high-speed I2C

and MDIO open-drain operation. The maximum data rate

is at least 4MHz for open-drain operation with the total

bus capacitance equal to or less than 100pF.

Three-State Input TS

The device features a three-state input that can put the

device into high-impedance mode. When TS is low,

IOVCC_ and IOVL_ are all high impedance and the inter-

nal pullup resistors are disconnected. When TS is high,

the internal pullup resistors are connected when the

corresponding power is in regulation, and the resistors

are disconnected at the side that has no power on. In

many portable applications, one supply is turned off but

the other side is still operating and requires the pullup

resistors to be present. This feature eliminates the need

for external pullup resistors. The level translation function

is off until both power supplies are in range.

Thermal-Shutdown Protection

The device features thermal-shutdown protection to

protect the part from overheating. The device enters

thermal shutdown when the junction temperature exceeds

+150NC (typ), and the device is back to normal operation

again after the temperature drops by approximately 10NC

(typ). When the device is in thermal shutdown, the level

translator is disabled.

ONE-SHOOT

BLOCK

ONE-SHOOT

BLOCK

EN CONTROL

BLOCK

GATE

DRIVE

IOVL_

NQ1

IOVCC_

VL

VCC

TS

MAX14595

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