BU7870KN-E2 Rohm Semiconductor, BU7870KN-E2 Datasheet

BU7870KN-E2

Manufacturer Part Number

BU7870KN-E2

Description

IC USB/UART INTERFACE QFN28V TR

Manufacturer

Rohm Semiconductor

Type

Interfacer

Datasheet

1.BU7870KN-E2.pdf (2 pages)

Specifications of BU7870KN-E2

Protocol

USB 1.1

Voltage - Supply

2.5 V ~ 3.3 V

Mounting Type

Surface Mount

Package / Case

28-QFN

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Number Of Drivers/receivers

Current page: 1 of 2
Download datasheet (108Kb)

∗

Supply voltage

Power dissipation

Operating temperature range

Storage temperature range

Digital operating voltage

Derating : 3.7mW/˚C for operation above Ta=25˚C

Description

Features

1) Applicable to 10pins external Interface for IMT-2000

2) Built-in switch circuit for USB

3) Built-in driver for UART

4) Built-in switch circuit for hands-free

5) Small and slim QFN28V package

Applications

Cellular phones for IMT-2000

The BU7870KN is an external interface IC for

IMT-2000 cellular phones. USB, UART and

hands-free devices are connected in the

IMT-2000 external interface block where output

must be switched appropriately for each device.

This switching can be realized by only this IC

and its small package size will also reduce the

mounting space.

Absolute Maximum Ratings (Ta=25˚C)

Recommended Operating Conditions (Ta=25˚C)

Parameter

IMT -2000 External Interface IC

CPUV

Symbol

Tstg

Topr

BU7870KN

Min.

2.5

–30

–55

Limits

370

Typ.

7.0

2.9

∗

+80

+125

Max.

3.3

Dimension (Unit : mm)

Unit

˚C

QFN28V

Related parts for BU7870KN-E2

BU7870KN-E2 Summary of contents

Page 1

... IMT -2000 External Interface IC Description The BU7870KN is an external interface IC for IMT-2000 cellular phones. USB, UART and hands-free devices are connected in the IMT-2000 external interface block where output must be switched appropriately for each device. This switching can be realized by only this IC and its small package size will also reduce the mounting space ...

Page 2

... MODE 0,1 MODE 3,5 : OFF MODE 0,1 MODE 3,5 : OFF GND1 14 RXANAIN 13 CPUVDD TXANAOUT 12 CPUVDD MODE 0,2,3 MODE MODESEL3 11 BCNT 10 BDATA 9 UART_CTS 8 CPUVDD BU7870KN 2.9V UART Max. Unit Conditions µ — 0.2xCPUV V DD µ =CPUV IH DD µA –10 V =0V IL — =– ...

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