MAX3377EETDT datasheet(11/26 Pages) MAXIM

Part #	MAX3377EETDT

Description	±15kV ESD-Protected, 1uA, 16Mbps, Dual Quad Low-Voltage Level Translators in UCSP

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Manufacturer	MAXIM [Maxim Integrated Products]

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MAX3372E–MAX3379E/MAX3390E–MAX3393E

±15kV ESD-Protected, 1µA, 16Mbps, Dual/Quad

Low-Voltage Level Translators in UCSP

11

Maxim Integrated

Level Translation

For proper operation ensure that +1.65V

≤ VCC ≤

+5.5V, +1.2V

≤ VL ≤ +5.5V, and VL ≤ (VCC + 0.3V).

During power-up sequencing, VL

≥ (VCC + 0.3V) will

not damage the device. During power-supply sequenc-

ing, when VCC is floating and VL is powering up, a cur-

rent may be sourced, yet the device will not latch up.

The speed-up circuitry limits the maximum data rate for

devices in the MAX3372E–MAX3379E, MAX3390E–

MAX3393E family to 16Mbps. The maximum data rate

also depends heavily on the load capacitance (see the

Typical Operating Characteristics), output impedance

of the driver, and the operational voltage range (see the

Timing Characteristics table).

Speed-Up Circuitry

The MAX3373E–MAX3376E/MAX3378E/MAX3379E and

MAX3390E–MAX3393E feature a one-shot generator that

decreases the rise time of the output. When triggered,

MOSFETs PU1 and PU2 turn on for a short time to pull up

I/O VL_ and I/O VCC_ to their respective supplies (see

Figure 2b). This greatly reduces the rise time and propa-

gation delay for the low-to-high transition. The scope

photo of Rail-to-Rail Driving for 8Mbps Operation in the

Typical Operating Characteristics shows the speed-up

circuitry in operation.

Rise-Time Accelerators

The MAX3373E–MAX3376E/MAX3378E/MAX3379E and

the MAX3390E–MAX3393E have internal rise-time

accelerators allowing operation up to 16Mbps. The

rise-time accelerators are present on both sides of the

device and act to speed up the rise time of the input

and output of the device, regardless of the direction of

the data. The triggering mechanism for these accelera-

tors is both level and edge sensitive. To prevent false

triggering of the rise-time accelerators, signal fall times

of less than 20ns/V are recommended for both the

inputs and outputs of the device. Under less noisy con-

ditions, longer signal fall times may be acceptable.

MAX3372E–MAX3379E

AND MAX3390E–MAX3393E

I/O VL_

I/O VCC_

VCC

VL

GND

I/O VCC_

tPD-VCC-LH

tPD-VCC-HL

I/O VL_

tRVCC

tFVCC

DATA

RLOAD

CLOAD

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

MAX3373E–MAX3376E,

MAX3378E/MAX3379E

AND MAX3390E–MAX3393E

I/O VL_

I/O VCC_

DATA

I/O VCC_

VCC

VL

GND

RLOAD

CLOAD

tPD-VL-LH

tPD-VL-HL

I/O VL_

tRVL

tFVL

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

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MAX3377EETDT Datasheet(PDF) 11 Page - Maxim Integrated Products

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