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24LCS21AI/P

Description
128 X 8 I2C/2-WIRE SERIAL EEPROM, PDIP8, 0.300 INCH, ROHS COMPLIANT, PLASTIC, DIP-8
Categorystorage    storage   
File Size124KB,16 Pages
ManufacturerMicrochip
Websitehttps://www.microchip.com
Environmental Compliance
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24LCS21AI/P Overview

128 X 8 I2C/2-WIRE SERIAL EEPROM, PDIP8, 0.300 INCH, ROHS COMPLIANT, PLASTIC, DIP-8

24LCS21AI/P Parametric

Parameter NameAttribute value
Is it lead-free?Lead free
Is it Rohs certified?conform to
Parts packaging codeDIP
package instruction0.300 INCH, ROHS COMPLIANT, PLASTIC, DIP-8
Contacts8
Reach Compliance Codecompli
Maximum clock frequency (fCLK)0.1 MHz
JESD-30 codeR-PDIP-T8
JESD-609 codee3
length9.46 mm
memory density1024 bi
Memory IC TypeEEPROM
memory width8
Number of functions1
Number of terminals8
word count128 words
character code128
Operating modeSYNCHRONOUS
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
organize128X8
Output characteristicsOPEN-DRAIN
Package body materialPLASTIC/EPOXY
encapsulated codeDIP
Package shapeRECTANGULAR
Package formIN-LINE
Parallel/SerialSERIAL
Peak Reflow Temperature (Celsius)NOT SPECIFIED
Certification statusNot Qualified
Maximum seat height4.32 mm
Serial bus typeI2C
Maximum supply voltage (Vsup)5.5 V
Minimum supply voltage (Vsup)2.5 V
Nominal supply voltage (Vsup)3 V
surface mountNO
technologyCMOS
Temperature levelINDUSTRIAL
Terminal surfaceMATTE TIN
Terminal formTHROUGH-HOLE
Terminal pitch2.54 mm
Terminal locationDUAL
Maximum time at peak reflow temperatureNOT SPECIFIED
width7.62 mm
Maximum write cycle time (tWC)10 ms
Base Number Matches1
24LCS21A
1K Dual Mode CMOS Serial EEPROM
FEATURES
• Single supply with operation down to 2.5V
• Completely implements DDC1
/DDC2
interface for monitor identification, including recov-
ery to DDC1
• Low power CMOS technology
- 1 mA typical active current
- 10
µ
A standby current typical at 5.5V
• 2-wire serial interface bus, I
2
C
compatible
• 100 kHz (2.5V) and 400 kHz (5V) compatibility
• Self-timed write cycle (including auto-erase)
• Hardware write-protect pin
• Page-write buffer for up to eight bytes
10,000,000 erase/write cycles guaranteed
• Data retention > 200 years
• ESD Protection > 4000V
• 8-pin PDIP and SOIC package
• Available for extended temperature ranges
- Commercial (C):
0
°
C to +70
°
C
- Industrial (I):
-40
°
C to +70
°
C‘
PIN CONFIGURATION
PDIP
NC
NC
WP
V
SS
SOIC
1
24LCS21A
2
3
4
8
7
6
5
V
CC
VCLK
SCL
SDA
NC
NC
WP
V
SS
1
2
3
4
24LCS21A
8
7
6
5
V
CC
VCLK
SCL
SDA
DESCRIPTION
The Microchip Technology Inc. 24LCS21A 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
information. Two modes of operation have been imple-
mented: Transmit-Only Mode and Bi-directional Mode.
Upon power-up, the device will be in the Transmit-Only
Mode, sending a serial bit stream of the memory array
from 00h to 7Fh, clocked by the VCLK pin. A valid high
to low transition on the SCL pin will cause the device to
enter the transition mode, and look for a valid control
byte on the I
2
C bus. If it detects a valid control byte from
the master, it will switch into Bi-directional Mode, with
byte selectable read/write capability of the memory
array using SCL. If no control byte is received, the
device will revert to the Transmit-Only Mode after it
receives 128 consecutive VCLK pulses while the SCL
pin is idle. The 24LCS21A also enables the user to
write-protect the entire memory array using its write-
protect pin. The 24LCS21A is available in a standard
8-pin PDIP and SOIC package in both commercial and
industrial temperature ranges.
.
BLOCK DIAGRAM
WP
HV GENERATOR
I/O
CONTROL
LOGIC
MEMORY
CONTROL
LOGIC
XDEC
EEPROM
ARRAY
PAGE LATCHES
SDA
SCL
YDEC
VCLK
SENSE AMP
R/W CONTROL
V
CC
V
SS
DDC is a trademark of the Video Electronics Standards Association.
I
2
C is a trademark of Philips Corporation.
©
1996 Microchip Technology Inc.
Preliminary
This document was created with FrameMaker 4 0 4
DS21161A-page 1

24LCS21AI/P Related Products

24LCS21AI/P 24LCS21AI/SN
Description 128 X 8 I2C/2-WIRE SERIAL EEPROM, PDIP8, 0.300 INCH, ROHS COMPLIANT, PLASTIC, DIP-8 128 X 8 I2C/2-WIRE SERIAL EEPROM, PDSO8, 0.150 INCH, ROHS COMPLIANT, PLASTIC, SOIC-8
Is it lead-free? Lead free Lead free
Is it Rohs certified? conform to conform to
Parts packaging code DIP SOIC
package instruction 0.300 INCH, ROHS COMPLIANT, PLASTIC, DIP-8 0.150 INCH, ROHS COMPLIANT, PLASTIC, SOIC-8
Contacts 8 8
Reach Compliance Code compli compli
Maximum clock frequency (fCLK) 0.1 MHz 0.1 MHz
JESD-30 code R-PDIP-T8 R-PDSO-G8
JESD-609 code e3 e3
length 9.46 mm 4.9 mm
memory density 1024 bi 1024 bi
Memory IC Type EEPROM EEPROM
memory width 8 8
Number of functions 1 1
Number of terminals 8 8
word count 128 words 128 words
character code 128 128
Operating mode SYNCHRONOUS SYNCHRONOUS
Maximum operating temperature 85 °C 85 °C
Minimum operating temperature -40 °C -40 °C
organize 128X8 128X8
Output characteristics OPEN-DRAIN OPEN-DRAIN
Package body material PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code DIP SOP
Package shape RECTANGULAR RECTANGULAR
Package form IN-LINE SMALL OUTLINE
Parallel/Serial SERIAL SERIAL
Peak Reflow Temperature (Celsius) NOT SPECIFIED 260
Certification status Not Qualified Not Qualified
Maximum seat height 4.32 mm 1.75 mm
Serial bus type I2C I2C
Maximum supply voltage (Vsup) 5.5 V 5.5 V
Minimum supply voltage (Vsup) 2.5 V 2.5 V
Nominal supply voltage (Vsup) 3 V 3 V
surface mount NO YES
technology CMOS CMOS
Temperature level INDUSTRIAL INDUSTRIAL
Terminal surface MATTE TIN MATTE TIN
Terminal form THROUGH-HOLE GULL WING
Terminal pitch 2.54 mm 1.27 mm
Terminal location DUAL DUAL
Maximum time at peak reflow temperature NOT SPECIFIED 40
width 7.62 mm 3.91 mm
Maximum write cycle time (tWC) 10 ms 10 ms
Base Number Matches 1 1
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