PCF8598C-2 データシートの表示（PDF） - Unspecified

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PCF8598C-2

I2C Serial EEPROM and RAM

Unspecified 

Philips Configuration

System Management ICs

EEPROM & RAM

I2C Serial EEPROM and RAM

EEPROMs are particularly useful in applications where data retention

during power-off is essential. Applications include meter readings,

electronic key, product identification number, serial presence

detect (SPD), etc... A common pinning is used for all these

EEPROMs because functionality is very similar.The pinout was

selected to allow interchangeability.

Features

• Wide voltage range of 2.5 V to 5.5V

• 1,000,000 write cycles

• Infinite number of read cycles

• 10 year data retention (Minimum)

Key Points

• The I2C bus is used to read and write information to

and from the memory

• A wide voltage range minimizes the number of

EEPROMs that need to be stocked

I2C Slave Address

A2 A1 A0

1

0

1

0 or or or R/W

Block# Block# Block#

FIXED

PROGRAMMABLE

PCA8581/8581(C)

PCF8570/82/94/98/102/116

0

0

1

0 A2 A1 A0 R/W

FIXED

PROGRAMMABLE

PCF85103

Description

The Philips family of I2C bus compatible memories comprises RAM,

EEPROM, video memories and Flash memories.

RAM is Random Access Memory

EEPROM is Electrically Erasable Programmable Read Only Memory

Small size serial memories (RAM and EEPROM) are fairly common and widely

used in many different applications. EEPROM is particularly useful in applica-

tions where data retention during power-off is essential. Such applications include

but are not limited to: meter readings, electronic key, product identification

number, serial presence detect (SPD) on DIMMs, etc. A common pinning is

used for these serial memories because their functionality is very similar. The

common pinout was selected to allow interchangeability. EEPROMs store data

(2 Kbits organized in 256 X 8 in the PCF8582C-2 for example), including set

points, temperature, alarms, DIMM information and more, for a guaranteed

minimum storage time of ten years in the absence of power. EEPROMs can

change values up to 1,000,000 times and have an infinite number of read cycles,

while consuming only 10 micro Amperes of current.

RAM

• The PCF8570 is organized as 256 words of 8-bytes.

EEPROM

• The PCF8581/8581C is organized as 128 words of 8-bytes.

• The PCF8582C-2 is organized as 256 words of 8-bytes.

• The PCF8594C-2 is organized as 512 words of 8-bytes in two 256

word pages.

• The PCF8598C-2 is organized as 1024 words of 8-bytes in four 256

word pages.

• The PCF85116-3 is organized as 2048 words of 8-bytes in eight 256

word pages.

The PCF8582C-2 is pin and address compatible with the PCF8570 and

PCA8581. The PCF85102C-2 is identical to the PCF8582C-2, with pin 7

(Programming Time Control output) as a no connect, to allow it to be used in

competitors’ sockets, since

PCF85103C-2 is identical

PTC should be left floating

to the PCF8582C-2 except

othrahtetlhdeaftixVeCd CI2.CTahdedress

is different, allowing up to eight of each device to be used on the same I2C bus.

Addresses and data are transferred serially via a two-wire bi-directional bus (I2C-

bus). The built-in word address register is incremented automatically after each

written or read data byte. All bytes can be read in a single operation. Up to 8

bytes can be written in one operation, reducing the total write time per byte.

The 512-byte, 1024-byte and 2048-byte EEPROMs use the programmable

address (Ax or Block #) to either select the slave address or one of the 256 word

pages (e.g., the PCF8594C-2 has two addressable pages with up to four devices

allowed on the same I2C bus while the PCF85116-3 has eight addressable pages

but only one device is allowed on the same I2C bus).

EEPROM/RAM Features

• Internal non-volatile registers (except PCF8570) with a minimum of

1,000,000 write cycles at Tambient = 22 oC

• Low power CMOS devices

• Non volatile storage from 128x8-bit to 2048x8-bit

• Write operation per byte or per 8-byte page

• Read operation can be sequential or random

• Internal timer for writing operation (no external components required)

• Internal Power On Reset

• High reliability by using redundant EEPROMS cells

• Offered in 8-pin DIP (N) and SO (D) packages

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