CAT25C021P-17TE13 View Datasheet(PDF) - Catalyst Semiconductor => Onsemi

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CAT25C021P-17TE13

Supervisory circuits with SPI serial E2EPROM, precision reset controller and watchdog timer

Catalyst Semiconductor => Onsemi 

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CAT25CXXX

Supervisory Circuits with SPI Serial E2PROM, Precision Reset Controller and Watchdog Timer

FEATURES

s 10 MHz SPI Compatible

s 1.8 to 6.0 Volt Operation

s Hardware and Software Protection

s Zero Standby Current

s Low Power CMOS Technology

s SPI Modes (0,0 &1,1)

s Commercial, Industrial and Automotive

Temperature Ranges

s Active High or Low Reset Outputs

– Precision Power Supply Voltage Monitoring

– 5V, 3.3V, 3V and 1.8V Options

DESCRIPTION

The CAT25CXXX is a single chip solution to three

popular functions of EEPROM Memory, precision reset

controller and watchdog timer. The EEPROM Memory is

a 2K/4K/8K/16K/32K-Bit SPI Serial CMOS E2PROM

internally organized as 256x8/512x8/1024x8/2048x8/

4096x8 bits. Catalyst’s advanced CMOS Technology

substantially reduces device power requirements. The

2K/4K devices feature a 16-byte page write buffer. The

8K/16K/32K devices feature a 32-byte page write

buffer.The device operates via the SPI bus serial inter-

face and is enabled though a Chip Select (CS). In

s Watchdog Timer on CS

s 1,000,000 Program/Erase Cycles

s 100 Year Data Retention

s Self-Timed Write Cycle

s 8-Pin DIP/SOIC, 16-Pin SOIC and 14-Pin TSSOP

s Page Write Buffer

s Block Write Protection

– Protect 1/4, 1/2 or all of E2PROM Array

s Programmable Watchdog Timer

s Built-in inadvertent Write Protection

– VCC Lock Out

addition to the Chip Select, the clock input (SCK), data

in (SI) and data out (SO) are required to access the

device. The reset function of the 25CXXX protects the

system during brown out and power up/down condtions.

During system failure the watchdog timer feature pro-

tects the microcontroller with a reset signal. The

CAT25CXXX is designed with software and hardware

write protection features including Block Lock protec-

tion. The device is available in 8-pin DIP, 8-pin SOIC, 16-

pin SOIC and 14-pin TSSOP packages.

PIN CONFIGURATION

TSSOP Package (U14)

SOIC Package (S16)

SOIC Package (S)

DIP Package (P)

CS 1

SO 2

NC 3

NC 4

NC 5

WP 6

VSS 7

14 VCC

CS

1

13 RESET/RESET SO 2

12 NC

NC 3

11 NC

10 NC

9 SCK

8 SI

NC 4

NC 5

NC 6

WP 7

VSS 8

16 VCC

CS 1

15 RESET/RESET SO 2

14 NC

WP 3

13 NC

VSS 4

12 NC

11 NC

10 SCK

9 SI

8 VCC

CS 1

7 RESET/RESET SO 2

6 SCK

WP 3

5 SI

VSS 4

8 VCC

7 RESET/RESET

6 SCK

5 SI

© 1998 by Catalyst Semiconductor, Inc.

Characteristics subject to change without notice

9-95

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