Key facts
- Brand
- Catalyst
- Model
- CAT1320
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-06-05
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Catalyst Semiconductor CAT1320/CAT1321 Supervisory Circuits Datasheet
The Catalyst Semiconductor CAT1320 and CAT1321 are complete memory and supervisory solutions designed for microcontroller-based systems. They integrate a 32kbit serial EEPROM with a system power supervisor that includes brown-out protection, all implemented in low-power CMOS technology.
These devices interface via a 400kHz I2C bus and support 5V, 3.3V, and 3V systems through five selectable reset threshold voltages. The CAT1320 provides an active-low reset output, while the CAT1321 provides an active-high reset output. Both models feature hardware data protection that prevents EEPROM writes when the power supply voltage falls below the reset threshold or during unstable power-up conditions.
Catalyst CAT1320 specifications
| Operating Voltage Range | 3.0V to 5.5V |
|---|---|
| Program/Erase Cycles | 1,000,000 |
| Data Retention | 100 years |
| Package Types | DIP, SOIC, TSSOP, TDFN |
Source: Catalyst Semiconductor CAT1320/CAT1321 Supervisory Circuits Datasheet
All Catalyst CAT1320 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the difference between CAT1320 and CAT1321?
The CAT1320 provides an active low reset output, while the CAT1321 provides an active high reset output.
From: Catalyst Semiconductor CAT1320/CAT1321 Supervisory Circuits Datasheet
What voltage thresholds are supported?
The devices support five reset threshold voltages for 5V, 3.3V, and 3V systems.
From: Catalyst Semiconductor CAT1320/CAT1321 Supervisory Circuits Datasheet
What is the reset output behavior of the CAT1320?
The CAT1320 provides an active‑low reset output that goes low whenever VCC falls below the configured threshold voltage.
From: Catalyst CAT1320 CAT1321 Supervisory Circuits with I2C Serial 32K CMOS EEPROM Datasheet
How many program/erase cycles are guaranteed for these devices?
Both devices are rated for up to 1 000 000 program/erase cycles.
From: Catalyst CAT1320 CAT1321 Supervisory Circuits with I2C Serial 32K CMOS EEPROM Datasheet