MAX3456EEUD datasheet(7/19 Pages) MAXIM

Part #	MAX3456EEUD

Description	짹15kV ESD-Protected USB Transceivers

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Manufacturer	MAXIM [Maxim Integrated Products]

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±15kV ESD-Protected USB Transceivers

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7

MAX3454E/

MAX3455E/

MAX3456E

MAX3453E

TSSOP

THIN QFN

TSSOP

THIN QFN

NAME

FUNCTION

11

D+

USB Input/Output. For OE = GND, D+ functions as a USB

output, with VP providing the input signal. For OE = VL, D+

functions as a USB input, with VP functioning as a single-ended

receiver output. Connect a 1.5k

Ω resistor from D+ to VTRM for

full-speed (12Mbps) operation (MAX3455E/MAX3456E). Drive

ENUM to VL to connect the internal 1.5k

Ω resistor (MAX3453E/

MAX3454E) from D+ to VTRM for full-speed (MAX3454E, SPD =

VL) operation.

12

VTRM

Internal Regulator Output. VTRM provides a regulated +3.3V

output. Bypass VTRM to GND with a 1µF (min) ceramic

capacitor as close to the device as possible. VTRM normally

derives power from VBUS. Alternatively, drive VTRM directly with

a +3.3V

±10% supply (MAX3454E/MAX3456E). VTRM provides

power to internal circuitry and provides the pullup voltage for an

external USB pullup resistor (MAX3455E/MAX3456E). Do not

use VTRM to power external circuitry.

13

(MAX3455E

only)

13

(MAX3455E

only)

13

BD

Bus-Detection Output (MAX3453E/MAX3455E). The push-pull

BD output asserts low and the device enters sharing mode if

VBUS < +3.6V. BD asserts high if VBUS > +4.0V.

13

(MAX3454E

only)

13

(MAX3454E

only)

2

1

ENUM

Enumerate Function Selection Input (MAX3453E/MAX3454E).

Drive ENUM to VL to connect the internal 1.5k

Ω resistor

between VTRM and D+ or D-, depending on the state of SPD.

Drive ENUM to GND to disconnect the internal 1.5k

Ω resistor.

For SPD = VL, the 1.5k

Ω resistor connects to D+. For SPD =

GND, the 1.5k

Ω resistor connects to D-. For the MAX3453E, the

resistor only connects to D+.

14

VBUS

USB Power-Supply Input. Connect a +4.0V to +5.5V power

supply to VBUS. VBUS provides power to the internal linear

regulator. Bypass VBUS to GND with a 0.1µF ceramic capacitor

as close to the device as possible. Connect VBUS and VTRM

together when powering the MAX3454E/MAX3456E with an

external power supply (+3.3V

±10%).

Pin Description (continued)

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