CAT1162J-42TE13 datasheet(6/12 Pages) CATALYST

Il numero della parte	CAT1162J-42TE13

Spiegazioni elettronici	Supervisory Circuits with I2C Serial CMOS EEPROM, Precision Reset Controller and Watchdog Timer

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Produttore elettronici	CATALYST [Catalyst Semiconductor]

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CAT1161/2

Doc. No. 3002, Rev. D

falls below (power down) VTH or until VCC reaches the

reset threshold (power up) VTH. Any attempt to access

the internal EEPROM is not recognized and an ACK will

not be sent on the SDA line when RESET or

RESET

is active.

Reset Threshold Voltage

The CAT1161/2 is offered with five reset threshold

voltage ranges. They are 4.50-4.75V, 4.25-4.50V, 3.00-

3.15V, 2.85-3.00V and 2.55-2.70V.

Hardware Data Protection

The CAT1161/2 is designed with the following hardware

data protection features to provide a high degree of data

integrity.

(1) The CAT1161/2 features a WP pin. When the WP pin

is tied high the entire memory array becomes write

protected (read only).

(2) The VCC sense provides write protection when VCC

falls below the reset threshold value (VTH). The VCC lock

out inhibits writes to the serial EEPROM whenever VCC

tHIGH

SCL

SDA IN

SDA OUT

tLOW

tF

tLOW

tR

tBUF

tSU:STO

tSU:DAT

tHD:DAT

tHD:STA

tSU:STA

tAA

tDH

Figure 2. Bus Timing

tWR

STOP

CONDITION

START

CONDITION

ADDRESS

ACK

8TH BIT

BYTE n

SCL

SDA

Figure 3. Write Cycle Timing

START BIT

SDA

STOP BIT

SCL

Figure 4. Start/Stop Timing

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