LTM2883 datasheet(7/18 Pages) AD

7 / 18 page

LTM2894

Rev A

For more information www.analog.com

PIN FUNCTIONS

Upstream Side

D1– (A1): USB Data Bus Upstream Facing Negative

Transceiver Pin. A 1.5k pull-up resistor is automatically

configured to indicate the idle condition of the D1– pin.

D1+ (A2): USB Data Bus Upstream Facing Positive

Transceiver Pin. A 1.5k pull-up resistor is automatically

configured to indicate the idle condition of the D1+ pin.

ON (A3): Enable. Enables data communication through

the isolation barrier. If ON is high, the upstream side is

enabled. If ON is low, the upstream side is held in reset.

The ON pin is referenced between VLO and GND.

VLO (A4): Voltage Supply Output from the Upstream Side

3.3V LDO. The VLO pin is used as a positive reference for

the ON pin and can support up to 10mA of surplus current

to controlling devices. This pin contains internal ceramic

bypass capacitance of 4.4µF.

GND (A5, B1 - B6): Upstream Circuit Ground.

VBUS (A6): Voltage Supply Input for Upstream USB

Transceiver.Recommendedoperatingrangeis4.4Vto36V.

ConnecttotheUSBVBUSsupplyoranexternalsource.This

pincontainsinternalceramicbypasscapacitanceof0.3µF.

Downstream Side

GND2 (W1 - W6, X5): Downstream Circuit Ground.

D2– (X1): USB Data Bus Downstream Facing Negative

Transceiver Pin. The pin has a 15k pull-down resistor to

GND2.

D2+ (X2): USB Data Bus Downstream Facing Positive

Transceiver Pin. The pin has a 15k pull-down resistor to

GND2.

ON2 (X3): Enable. Enables data communication through

the isolation barrier. If ON2 is high, the downstream side

is enabled. If ON2 is low, the downstream side is held in

reset. The ON2 pin is referenced between VLO2 and GND2.

VLO2 (X4): Voltage Supply Output from the Downstream

Side 3.3V LDO. The VLO2 pin can support up to 10mA of

surplus current for low voltage devices. This pin contains

internal ceramic bypass capacitance of 4.4µF.

VBUS2 (X6): Voltage Supply Input for the Isolated Down-

stream USB Transceiver. Recommended operating range

is 4.4V to 36V referenced to GND2. This pin contains

internal ceramic bypass capacitance of 0.3µF.

PACKAGE ROW AND COLUMN LABELING MAY VARY

AMONG µModule PRODUCTS. REVIEW EACH PACKAGE

LAYOUT CAREFULLY.

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