PCB2421 datasheet(3/24 Pages) PHILIPS

3 / 24 page

1997 Apr 01

Philips Semiconductors

Preliminary speciﬁcation

1K dual mode serial EEPROM

PCB2421

FEATURES

• Single supply with operation 4.5 to 5.5 V

• Completely implements DDC1/DDC2B interface for

monitor identification

• Low power CMOS technology

• Two-wire I2C-bus interface

• Self-timed write cycle (including auto-erase)

• Page-write buffer for up to 8 bytes

• Write-protect pin

• 100 kHz I2C-bus compatibility

• Designed for 10000 erase/write cycles minimum

• Data retention greater than 10 years

• 8-pin DIP and SO package

• Temperature range 0 to +70 °C.

GENERAL DESCRIPTION

The Philips PCB2421 is a 128

× 8-bit dual mode serial

Electrically Erasable PROM (EEPROM).

This device is designed for use in applications requiring

storage and serial transmission of configuration and

control information. Two modes of operation have been

implemented: transmit-only mode (DDC1 mode) and

bidirectional mode (DDC2B, or I2C-bus mode). Upon

power-up, the device will be in the transmit-only mode,

sending a serial bitstream of the entire memory array

contents, clocked by the VCLK pin. A valid HIGH-to-LOW

transition on the SCL pin will cause the device to enter the

bidirectional mode, with byte selectable read/write

capability of the memory array. The PCB2421 is available

in a standard 8-pin dual in-line and 8-pin small outline

package operating in a commercial temperature range.

ORDERING INFORMATION

TYPE NUMBER

PACKAGE

NAME

DESCRIPTION

VERSION

PCB2421P

DIP8

plastic dual in-line package; 8 leads (300 mil)

SOT97-1

PCB2421T

SO8

plastic small outline package; 8 leads; body width 3.9 mm

SOT96-1

PCB2421 数据表(PDF) 3 Page - NXP Semiconductors

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