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24LC41-IP Datasheet(PDF) 1 Page - Microchip Technology |
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24LC41-IP Datasheet(HTML) 1 Page - Microchip Technology |
1 / 12 page © 1996 Microchip Technology Inc. DS21140B-page 1 FEATURES • Single supply with operation down to 2.5V • Completely implements DDC1 ™/DDC2™ interface for monitor identification • Separate high speed 2-wire bus for microcontroller access to 4K-bit Serial EEPROM • Low power CMOS technology • 2 mA active current typical • 20 µA standby current typical at 5.5V • Dual 2-wire serial interface bus • Hardware write-protect for both ports • Self-timed write cycle (including auto-erase) • Page-write buffer for up to 8 bytes (DDC port) or 16 bytes (4K Port) • 100 kHz (2.5V) and 400 kHz (5V) compatibility • 1,000,000 erase/write cycles guaranteed • Data retention > 40 years • 8-pin PDIP package • Available for extended temperature ranges DESCRIPTION The Microchip Technology Inc. 24LC41 is a dual-port 128 x 8 and 512 x 8-bit Electrically Erasable PROM (EEPROM). This device is designed for use in applica- tions requiring storage and serial transmission of con- figuration and control information. Three modes of operation have been implemented: • Transmit-Only Mode for the DDC Monitor Port • Bi-directional Mode for the DDC Monitor Port • Bi-directional, industry-standard 2-wire bus for the 4K Microcontroller Access Port Upon power-up, the DDC Monitor Port will be in the Transmit-Only Mode, repeatedly sending a serial bit stream of the entire memory array contents, clocked by the VCLK/DWP pin. A valid high to low transition on the DSCL pin will cause the device to enter the bi-direc- tional Mode, with byte-selectable read/write capability of the memory array. The 4K-bit microcontroller port is completely independent of the DDC port, therefore, it can be accessed continuously by a microcontroller without interrupting DDC transmission activity. The 24LC41 is available in a standard 8-pin PDIP package in both commercial and industrial temperature ranges. - Commercial (C): 0 °C to +70 °C - Industrial (I): -40 °C to +85 °C PACKAGE TYPE BLOCK DIAGRAM DSCL VCLK/DWP VSS MSDA 1 2 3 4 8 7 6 5 DSDA VCC MWP MSCL PDIP EDID Table 1K Bit 4K Bit Serial EEPROM MSDA MSCL MWP DSDA VCLK/DWP DSCL 24LC41 1K/4K 2.5V Dual Mode, Dual Port I2C™ Serial EEPROM DDC is a trademark of the Video Electronics Standards Association. I2C is a trademark of Philips Corporation. This document was created with FrameMaker404 |
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