Download Datasheets 24LCS21A Device 
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Home - Memory Products - 128 to 1K Devices - 24LCS21A Device, download datasheet

Download Datasheets 24LCS21A Device

The 24LCS21 is a 128 x 8-bit dual-mode Serial Electrically Erasable PROM designed to meet the plug-and-play requirements of todays advanced monitors. The 24LCS21 represents a simple, low-cost route to meeting the stringent standards for monitor identification since it completely implements both the DDCI and DDC2 operating modes, including recovery to DDC1, as defined by the Video Electronics Standards Association. The 24LCS21A features a software enabled hardware write protection pin which enables the user to write-protect the entire memory contents. The 24LCS21A also features a 2-wire serial interface bus (I2C compatible), both commercial and industrial temperature ranges, ESD protection > 4000V, and a wide voltage range (2.5V to 5.5V). The 24LCS21A is available in standard 8-pin PDIP and SOIC packages.

Datasheet and Other Documentation

Detailed Content

Lit. Number



24LCS21A Datasheet


Download 24LCS21A Datasheet


In Production

Specification Chart

Operat. Voltage

E/W Cycles

Density (Organ.)

Write Speed

Clock Speed

2.5V to 5.5V


1K bits (x8)

10 ms

400 kHz

Additional Features

Same as 24LCS21 with return to DDC1 feature. Plug n Play compatible.

Package Options

8 SOIC 150mil(SN), 8 PDIP(P), 2008-2015 - download datasheets