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CAT1021

Supervisory Circuits with EEPROM Serial 2k-bit I2C Manual Reset and Watchdog Timer

ON Semiconductor 

CAT1021, CAT1022, CAT1023

BUS ACTIVITY: SLAVE

MASTER ADDRESS

SDA LINE

A

C

K

DATA n

DATA n+1

DATA n+2

A

A

A

C

C

C

K

K

K

Figure 12. Sequential Read Timing

S

T

DATA n+x

O

P

P

N

O

A

C

K

ORDERING INFORMATION

Orderable Part Numbers − CAT1021 Series

(See Notes 1 − 5)

Device

Reset Threshold

Package

Shipping†

CAT1021WI−45−GT3

4.50 V − 4.75 V

CAT1021WI−42−GT3

4.25 V − 4.50 V

CAT1021WI−30−GT3

3.00 V − 3.15 V

SOIC

CAT1021WI−28−GT3

2.85 V − 3.00 V

CAT1021WI−25−GT3

2.55 V − 2.70 V

CAT1021YI−45−GT3

4.50 V − 4.75 V

CAT1021YI−42−GT3

4.25 V − 4.50 V

CAT1021YI−30−GT3

3.00 V − 3.15 V

TSSOP

CAT1021YI−28−GT3

2.85 V − 3.00 V

CAT1021YI−25−GT3

CAT1021ZI−45−GT3

2.55 V − 2.70 V

4.50 V − 4.75 V

3000 Tape & Reel

CAT1021ZI−42−GT3

4.25 V − 4.50 V

CAT1021ZI−30−GT3

3.00 V − 3.15 V

MSOP

CAT1021ZI−28−GT3

2.85 V − 3.00 V

CAT1021ZI−25−GT3

2.55 V − 2.70 V

CAT1021ZD4I−45T3*

4.50 V − 4.75 V

CAT1021ZD4I−42T3*

4.25 V − 4.50 V

CAT1021ZD4I−30T3*

3.00 V − 3.15 V

TDFN

CAT1021ZD4I−28T3*

2.85 V − 3.00 V

CAT1021ZD4I−25T3*

2.55 V − 2.70 V

†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging

Specifications Brochure, BRD8011/D.

1. All packages are RoHS−compliant (Lead−free, Halogen−free).

2. The standard lead finish is NiPdAu.

3. For additional package and temperature options, please contact your nearest ON Semiconductor Sales office.

4. TDFN not available in NiPdAu (–G) version.

5. For detailed information and a breakdown of device nomenclature and numbering systems, please see the ON Semiconductor Device

Nomenclature document, TND310/D, available at www.onsemi.com

www.onsemi.com

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