MAX3397E 查看數據表（PDF） - Maxim Integrated

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MAX3397E

Dual Bidirectional Low-Level Translator in µDFN

Maxim Integrated 

Dual Bidirectional Low-Level

Translator in µDFN

VL

VCC

VL VCC

EN

MAX3397E

I/O VL_

DATA

I/O VCC_

GND

RLOAD

CLOAD

VL

VCC

VL VCC

EN

MAX3397E

CLOAD

DATA

I/O VL_

RLOAD

I/O VCC_

GND

I/O VL_

tPD-VL-VCC

tPD-VL-VCC

I/O VCC_

tPD-VCC-VL

tPD-VCC-VL

I/O VCC_

I/O VL_

tRVCC

tFVCC

tRVL

tFVL

Figure 1c. Open-Drain Driving I/O VL

Figure 1d. Open-Drain Driving I/O VCC

Operation with One Supply Disconnected

Certain applications require sections of circuitry to be

disconnected to save power. When VL is connected and

VCC is disconnected or connected to ground, the device

enters shutdown mode. In this mode, I/O VL can still be

driven without damage to the device; however, data

does not translate from I/O VL to I/O VCC. If VCC falls

more than 0.8V (typ) below VL, the device disconnects

the pullup resistors at I/O VL and I/O VCC. To achieve

the lowest possible supply current from VL when VCC is

disconnected, it is recommended that the voltage at the

VCC supply input be approximately equal to GND. Note:

When VCC is disconnected or connected to ground, I/O

VCC must not be driven more than VCC + 0.3V.

When VCC is connected and VL is less than 0.7V (typ),

the device enters shutdown mode. In this mode, I/O

VCC can still be driven without damage to the device;

however, data does not translate from I/O VCC to I/O VL.

Note: When VL is disconnected or connected to

ground, I/O VL must not be driven more than VL + 0.3V.

Thermal Short-Circuit Protection

Thermal-overload detection protects the MAX3397E

from short-circuit fault conditions. In the event of a

short-circuit fault, when the junction temperature (TJ)

reaches +150°C, a thermal sensor signals the shut-

down mode logic to force the device into shutdown

mode. When the TJ has cooled to +140°C, normal

operation resumes.

±15kV ESD Protection

As with all Maxim devices, ESD-protection structures

are incorporated on all pins to protect against electro-

static discharges encountered during handling and

assembly. The I/O VCC lines have extra protection

against static electricity. Maxim’s engineers have

developed state-of-the-art structures to protect these

pins against ESD of ±15kV without damage. The ESD

structures withstand high ESD in all states: normal

operation, shutdown mode, and powered down. After

an ESD event, Maxim’s E versions keep working without

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