Datasheet

Datasheet

10/18

TSZ02201-0R2R0G100270-1-2

© 2012 ROHM Co., Ltd. All rights reserved.

10.Jul.2012 Rev.001

www.rohm.com

TSZ22111・15・001

BR24C21xxx Series (1K)

According to ①

エラー! 編集中のフィールド コードからは、オブジェクトを作成できません。

and

VOL=0.4［V］

VIL=0.3×3

=0.9［V］

so that condition② is met

○SCL Pin Pull-up Resister

When SCL is controlled by the CMOS output the pull-up resistor at SCL is not required.

Several k

Ω are recommended for the pull-up resistor in order to drive the output port of the microcontroller.

●Notes For Power Supply

device may not work properly due to an incomplete reset of the internal circuit. To prevent this, the device has a P.O.R. and

1. "SDA='H'" and "SCL='L' or 'H'".

エラー! 編集中のフィールド コードからは、オブジェクトを作成できません。

3. Prevent SDA and SCL from being "Hi-Z".

In case conditions 1 and/or 2 cannot be met, take following

actions:

A)If unable to keep condition 1 ( SDA is "Low" during power

up):

→Control SDA ,SCL to be "High" as shown in figure below.

エラー! 編集中のフィールド コードからは、オブジェクトを作成できません。

B)If unable to keep condition 2.

→After power becomes stable, execute software reset. (See Figure 13.)

C)If unable to keep both conditions 1 and 2.

→Follow the instruction A first, then the instruction B.

●Vcc NOISE

○Bypass Condenser

Noise and surges on power line may cause abnormal function. It is recommended that the bypass condensers (0.1µF) are

attached on the Vcc and GND line beside the device. It is also recommended to attach bypass condensers on the board

close to the connector.

●Notes for Use

1) Described numeric values and data are design representative values, and the values are not guaranteed.

2) We believe that application circuit examples are recommendable, however, in actual use, confirm characteristics further

sufficiently. In the case of use by changing the fixed number of external parts, make your decision with sufficient margin in

consideration of static characteristics and transition characteristics and fluctuations of external parts and our LSI.

Recommended conditions of tR, tOFF, Vbot

tR

tOFF

Vbot

Below 10ms

Above 10ms

Below 0.3V

Below 100ms

Above 10ms

Below 0.2V

∴

≧

Figure 17.

Figure 18.

Figure 19.