Datasheet > BU1852GUW_12

BU1852GUW_12

更新时间： 2022-03-30 19:03:56

品牌	Logo	应用领域
罗姆 - ROHM		/
页数	文件大小	规格书
26页	492K
描述
Keyencoder IC

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BU1852GUW_12 数据手册

BU1852GUW

GPIO ICs

Keyencoder IC

BU1852GUW, BU1852GXW

No.11098EBT04

●Description

Keyencoder IC BU1852 can monitor up to 8x12 matrix (96 keys), which means to be adaptable to Qwerty keyboard. We

adopt the architecture that the information of the only key which status is changed, like push or release, is encoded into the

8 bits data. This can greatly reduce the CPU load which tends to become heavier as the number of keys increase.

(Previously, all key's status is stored in the registers.) When the number of keys is small, the extra ports can be used as

GPIO. Furthermore, auto sleep function contributes to low power consumption, when no keys are pressed. It is also

equipped with the various functions such as ghost key rejection, N-key Rollover, Built-in power on reset and oscillator.

●Features

1) Monitor up to 96 matrix keys.

2) Under 3µA Stand-by Current

3) Built-in Power on Reset.

4) Ghost key rejection.

5) Keyscan / GPIO selectable

6) 3 volt tolerant Input

●Absolute maximum ratings (Ta=25℃)

Parameter

Symbol

Ratings

-0.3 ~ +2.5

Unit

Conditions

VDD≦VDDIO

VDD

VDDIO

VI1

Supply Voltage

-0.3 ~ +4.5

-0.3 ~ VDD +0.3^※

XRST, XI, TW, PORENB

ADR

Input voltage

VI2

-0.3 ~ VDDIO +0.3^※

-0.3 ~ +4.5

XINT, SCL, SDA,

COL[11:0], ROW[7:0]

VIT

Storage temperature range

Package power

Tstg

-55 ~ +125

℃

272^※

※

This IC is not designed to be X-ray proof.

※1 It is prohibited to exceed the absolute maximum ratings even including +0.3 V.

※2 Package dissipation will be reduced each 2.72mW/℃ when the ambient temperature increases beyond 25℃.

●Operating conditions

Ratings

Parameter

Symbol

Unit

Conditions

Min.

1.65

Typ.

1.80

Max.

1.95

Supply voltage range

(VDD)

VDD

VDDIO

VI1

Supply voltage range

(VDDIO)

1.65

-0.2

-30

1.80

3.60

VDD+0.2

VDDIO+0.2

3.60

XRST, XI, TW, PORENB

ADR

Input voltage range

VI2

XINT, SCL, SDA,

COL[11:0], ROW[7:0]

VIT

Operating temperature range

Topr

+85

℃

www.rohm.com

2012.08 - Rev.B

1/25

12 3 4 5 6 7...26

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