24lcs21 Microchip Technology Inc., 24lcs21 Datasheet
24lcs21
Manufacturer Part Number
24lcs21
Description
1k 2.5v Dual Mode I 2 C? Serial Eeprom
Manufacturer
Microchip Technology Inc.
Datasheet
1.24LCS21.pdf
(24 pages)
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Features:
• Completely implements DDC1
• Hardware write-protect pin
• Single supply with operation down to 2.5V
• Low-power CMOS technology:
• 2-wire serial interface bus, I
• Self-timed write cycle (including auto-erase)
• Page-write buffer for up to 8 bytes
• 100 kHz (2.5V) and 400 kHz (5V) compatibility
• 1,000,000 erase/write cycles ensured
• Data retention > 200 years
• 8-pin PDIP and SOIC package
• Available for extended temperature ranges:
Description:
The Microchip Technology Inc. 24LCS21 is a 128 x 8-bit
dual-mode Electrically Erasable PROM. This device is
designed for use in applications requiring storage and
serial transmission of configuration and control informa-
tion. Two modes of operation have been implemented:
Transmit-Only mode and Bidirectional mode. Upon
power-up, the device will be in the Transmit-Only mode,
sending a serial bit stream of the entire memory array
contents, clocked by the V
transition on the SCL pin will cause the device to enter
the Bidirectional mode, with byte selectable read/write
capability of the memory array in standard I
The 24LCS21 also enables the user to write-protect the
entire memory contents using its write-protect pin. The
24LCS21 is available in a standard 8-pin PDIP and
SOIC package in both commercial and industrial
temperature ranges.
© 2005 Microchip Technology Inc.
I
DDC is a trademark of the Video Electronics Standards Association.
2
C is a trademark of Philips Corporation.
for monitor identification
- 1 mA active current, typical
- 10 A standby current, typical at 5.5V
(SCL)
- Commercial (C):
- Industrial (I)
1K 2.5V Dual Mode I
-40°C
CLK
0°C to +70°C
2
C
pin. A valid high-to-low
™
™
/DDC2
compatible (SCL)
to +85°C
™
2
interface
C protocol.
2
C
Package Types
Block Diagram
™
V
V
SDA SCL
CC
SS
Control
SOIC
Logic
Serial EEPROM
PDIP
I/O
Not recommended for new designs –
Please use 24LCS21A.
WP
V
V
V
WP
WP
NC
NC
NC
NC
CLK
SS
SS
Memory
24LCS21
Control
Logic
1
2
3
4
1
2
3
4
XDEC
8
7
6
5
8
7
6
5
V
V
SCL
SDA
V
V
SCL
SDA
DS21127F-page 1
CC
CLK
CC
CLK
HV Generator
Page Latches
R/W Control
Sense Amp
EEPROM
YDEC
Array
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