24LCS21A-I/P

Manufacturer Part Number24LCS21A-I/P
Description1K 2.5V DUAL MODE SERIAL EEPROM, IND
ManufacturerMicrochip Technology Inc.
24LCS21A-I/P datasheet
 

Specifications of 24LCS21A-I/P

Capacitance, Input10 pFCapacitance, Output10 pF
Current, Input, Leakage±1 μACurrent, Operating1 mA (Read), 3 mA (Write)
Current, Output, Leakage±1Data Retention>200 yrs.
Density1KInterface2-Wire
Memory TypeSerial EEPROMOrganization128×8
Package TypePDIPTemperature, Operating-40 to +85 °C
Time, Access900 nsTime, Fall300 ns
Time, Rise1000 nsVoltage, Esd≥4 kV
Voltage, Input, High1.75 VVoltage, Input, Low0.75 V (SCL, SDA Pins), 0.5 V (VCLK Pins)
Voltage, Output, Low0.4, 0.6 VVoltage, Supply2.5 to 5.5 V
Lead Free Status / Rohs StatusRoHS Compliant part Electrostatic Device  
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1K 2.5V Dual Mode I
Features:
• Single Supply with Operation Down to 2.5V
• Completely Implements DDC1™/DDC2™ Inter-
face for Monitor Identification, Including Recovery
to DDC1
• Low-Power CMOS Technology:
- 1 mA active current, typical
- 10 μA standby current, typical at 5.5V
2
• 2-Wire Serial Interface Bus, I
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
• 1,000,000 Erase/Write Cycles Ensured
• Data Retention > 200 years
• ESD Protection > 4000V
• 8-pin PDIP and SOIC Package
• Available for Extended Temperature Ranges:
- Industrial (I):
-40°C to +70°C
• Pb-Free and RoHS Compliant
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 configura-
tion and control information. 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 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
detects a valid control byte from the master, it will
switch into Bidirectional 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 consec-
utive 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 industrial temperature range.
DDC is a trademark of the Video Electronics Standards Assoc.
2
I
C is a trademark of Philips Corporation.
© 2007 Microchip Technology Inc.
24LCS21A
2
C
Serial EEPROM
Package Types
PDIP
NC
NC
WP
Vss
SOIC
NC
NC
WP
Vss
Block Diagram
I/O
Control
Logic
SCL
SDA
VCLK
V
CC
2
V
C bus. If it
SS
Pin Function Table
Name
WP
V
SS
SDA
SCL
VCLK
V
CC
NC
1
8
Vcc
2
7
VCLK
3
6
SCL
4
5
SDA
1
8
Vcc
2
7
VCLK
3
6
SCL
4
5
SDA
WP
HV Generator
Memory
EEPROM
Control
Array
XDEC
Logic
Page Latches
YDEC
Sense AMP
R/W Control
Function
Write-Protect (active low)
Ground
Serial Address/Data I/O
Serial Clock (Bidirectional mode)
Serial Clock (Transmit-Only mode)
+2.5V to 5.5V Power Supply
No Connection
DS21161H-page 1

24LCS21A-I/P Summary of contents

  • Page 1

    ... 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 industrial temperature range. DDC is a trademark of the Video Electronics Standards Assoc. ...

  • Page 2

    ... ELECTRICAL CHARACTERISTICS (†) Absolute Maximum Ratings V .............................................................................................................................................................................7.0V CC All inputs and outputs w.r.t. V ......................................................................................................... -0. Storage temperature ...............................................................................................................................-65°C to +150°C Ambient temperature with power applied ................................................................................................-40°C to +125°C ESD protection on all pins ......................................................................................................................................................≥ † NOTICE: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device ...

  • Page 3

    ... Schmitt Trigger inputs which provide noise and specification for standard operation. I 24LCS21A Units Remarks kHz (Note 1) ns (Note 1) ns After this period the first clock pulse is generated ns Only relevant for repeated ...

  • Page 4

    ... To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office PART NO. X /XX Device Temperature Package Range Device: 24LCS21A Dual Mode I2C Serial EEPROM 24LCS21AT Dual Mode I2C Serial EEPROM (Tape and Reel) Temperature I = -40°C to +85°C Range: Package Plastic DIP (300 mil Body), 8-lead ...