24LC21/SN Microchip Technology, 24LC21/SN Datasheet

no-image

24LC21/SN

Manufacturer Part Number
24LC21/SN
Description
IC EEPROM 1KBIT 400KHZ 8SOIC
Manufacturer
Microchip Technology
Datasheet

Specifications of 24LC21/SN

Memory Size
1K (128 x 8)
Format - Memory
EEPROMs - Serial
Memory Type
EEPROM
Speed
100kHz, 400kHz
Interface
I²C, 2-Wire Serial
Voltage - Supply
2.5 V ~ 5.5 V
Operating Temperature
0°C ~ 70°C
Package / Case
8-SOIC (3.9mm Width)
Memory Configuration
128 X 8
Ic Interface Type
I2C
Clock Frequency
400kHz
Supply Voltage Range
2.5V To 5.5V
Memory Case Style
SOIC
No. Of Pins
8
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
24LC21/SN
Manufacturer:
MCP
Quantity:
15
Part Number:
24LC21/SN
Quantity:
5 510
Company:
Part Number:
24LC21/SN
Quantity:
1 370
Features:
• Single supply with operation down to 2.5V
• Completely implements DDC1
• 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
• Factory programming (QTP) available
• 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. 24LC21 is a 128 x 8 bit
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 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. The 24LC21 is available
in a standard 8-pin PDIP and SOIC package, in both
commercial and industrial temperature ranges.
 2004 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
Commercial (C):
Industrial (I):
1K 2.5V Dual Mode I
-40°C to +85°C
CLK
0°C to +70°C
2
C
pin. A valid high-to-low
/DDC2
compatible
interface
2
C
Package Types
Block Diagram
SDA SCL
V
V
Control
CC
SS
Serial EEPROM
Logic
PDIP
I/O
SOIC
Not recommended for new designs –
Please use 24LCS21A.
V
NC
NC
NC
SS
V
V
NC
NC
NC
SS
CLK
Memory
Control
Logic
1
2
3
4
1
2
3
4
24LC21
XDEC
8
7
5
5
8
7
6
5
DS21095J-page 1
HV Generator
Page Latches
R/W Control
Sense Amp
EEPROM
V
V
SCL
SDA
YDEC
Array
CC
CLK
V
V
SCL
SDA
CC
CLK

Related parts for 24LC21/SN

24LC21/SN Summary of contents

Page 1

... Industrial (I): -40°C to +85°C Description: The Microchip Technology Inc. 24LC21 is a 128 x 8 bit 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 implemented: Transmit-only mode and Bidirectional mode ...

Page 2

... CC I Read — — CCS — 100 Conditions — — V 2.7V (Note < 2.7V (Note 1) CC (Note mA 2.5V (Note OUT 5.0V (Note1 MHz A CLK V = 5.5V, SCL = 400 kHz 3.0V, SDA = SCL = 5.5V, SDA = SCL = (Note 2)  2004 Microchip Technology Inc. ...

Page 3

... This eliminates the need for This parameter is not tested but ensured by characterization. For endurance estimates in a specific application, please consult the Total Endurance at: www.microchip.com  2004 Microchip Technology Inc. Vcc= 4.5 - 5.5V Standard Mode Fast Mode Min ...

Page 4

... Most Significant bit of a byte. The device will power- indeterminate byte address. (Figure 2-2). T VAA Null Bit VLOW 2 8 pin, CLK pin must CLK Bit 1 (MSB) Bit VAA VAA Bit 8 Bit  2004 Microchip Technology Inc. ...

Page 5

... DATA TRANSFER SEQUENCE ON THE SERIAL BUS (A) (B) SCL SDA Start Condition  2004 Microchip Technology Inc. 3.1 Bidirectional Mode Bus Characteristics The following bus protocol has been defined: • Data transfer may be initiated only when the bus is not busy. • During data transfer, the data line must remain stable whenever the clock line is high ...

Page 6

... Acknowledge bit on the last byte that has been clocked out of the slave. In this case, the slave must leave the data line high to enable the master to generate the Stop condition. V HYS : STA T HIGH DAT SU DAT STA STO Stop STO T BUF  2004 Microchip Technology Inc. ...

Page 7

... SLAVE ADDRESS  2004 Microchip Technology Inc. 4.0 WRITE OPERATION 4.1 Byte Write Following the Start signal from the master, the slave address (4 bits), the “don’t care” bits (3 bits) and the R/W bit which is a logic low, is placed onto the bus by the master transmitter ...

Page 8

... BUS ACTIVITY Control A MASTER Byte R T SDA LINE S BUS ACTIVITY V CLK FIGURE 4-2: BYTE WRITE S T BUS ACTIVITY Control A MASTER Byte R T SDA LINE S BUS ACTIVITY V CLK DS21095J-page 8 can go low CLK Word Address Word Address Data Data  2004 Microchip Technology Inc. ...

Page 9

... FIGURE 4-3: PAGE WRITE S T BUS ACTIVITY A MASTER Control R T Byte SDA LINE S BUS ACTIVITY V CLK  2004 Microchip Technology Inc. Word Data (n) Address 24LC21 Data ( Data ( DS21095J-page 9 ...

Page 10

... CLK setting V low prevents writing to any location in the CLK array. Connecting the V pin to V CLK SS 24LC21 to operate as a serial ROM, although this configuration would prevent using the device in the Transmit-only mode.  2004 Microchip Technology Inc. would allow the ...

Page 11

... MASTER R T SDA LINE S BUS ACTIVITY  2004 Microchip Technology Inc. 7.3 Sequential Read Sequential reads are initiated in the same way as a random read except that after the 24LC21 transmits the first data byte, the master issues an acknowledge as opposed to a Stop condition in a random read. This directs the 24LC21 to transmit the next sequentially addressed 8-bit word (see Figure 7-3) ...

Page 12

... RANDOM READ S T Control BUS ACTIVITY A Byte MASTER SDA LINE BUS ACTIVITY FIGURE 7-3: SEQUENTIAL READ BUS ACTIVITY Control Data (n) MASTER Byte SDA LINE A C BUS ACTIVITY K DS21095J-page Word Control A Address Byte Data ( Data ( Data ( Data (  2004 Microchip Technology Inc. ...

Page 13

... For normal data transfer in the Bidirectional mode, SDA is allowed to change only during SCL low. Changes during SCL high are reserved for indicating the Start and Stop conditions.  2004 Microchip Technology Inc. 24LC21 8.2 SCL This pin is the clock input for the Bidirectional mode, and is used to synchronize data transfer to and from the device ...

Page 14

... PACKAGING INFORMATION 9.1 Package Marking Information 8-Lead PDIP XXXXXXXX XXXXXNNN YYWW 8-Lead SOIC (.150”) XXXXXXXX XXXXYYWW NNN DS21095J-page 14 Example 24LC21 017 0410 Example 24LC21 /SN0410 017  2004 Microchip Technology Inc. ...

Page 15

... Mold Draft Angle Top Mold Draft Angle Bottom * Controlling Parameter § Significant Characteristic Notes: Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed .010” (0.254mm) per side. JEDEC Equivalent: MS-001 Drawing No. C04-018  2004 Microchip Technology Inc ...

Page 16

... A2 MILLIMETERS MIN NOM MAX 8 1.27 1.35 1.55 1.75 1.32 1.42 1.55 0.10 0.18 0.25 5.79 6.02 6.20 3.71 3.91 3.99 4.80 4.90 5.00 0.25 0.38 0.51 0.48 0.62 0. 0.20 0.23 0.25 0.33 0.42 0.  2004 Microchip Technology Inc. ...

Page 17

... APPENDIX A: REVISION HISTORY Revision J Added note to page 1 header (Not recommended for new designs). Added Section 9.0: Package Marking Information. Added On-line Support page. Updated document format.  2004 Microchip Technology Inc. 24LC21 DS21095J-page 17 ...

Page 18

... NOTES: DS21095J-page 18  2004 Microchip Technology Inc. ...

Page 19

... Microchip Products • Conferences for products, Development Systems, technical information and more • Listing of seminars and events  2004 Microchip Technology Inc. SYSTEMS INFORMATION AND UPGRADE HOT LINE The Systems Information and Upgrade Line provides system users a listing of the latest versions of all of Microchip's development systems software products ...

Page 20

... What deletions from the document could be made without affecting the overall usefulness there any incorrect or misleading information (what and where)? 7. How would you improve this document? DS21095J-page 16 Total Pages Sent ________ FAX: (______) _________ - _________ N Literature Number: DS21095J  2004 Microchip Technology Inc. ...

Page 21

... The Microchip Worldwide Site (www.microchip.com) Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using. New Customer Notification System Register on our web site (www.microchip.com/cn) to receive the most current information on our products.  2004 Microchip Technology Inc. XXX Pattern ™ ...

Page 22

... NOTES: DS21095J-page 18  2004 Microchip Technology Inc. ...

Page 23

... PICLAB, PICtail, PowerCal, PowerInfo, PowerMate, PowerTool, rfLAB, rfPICDEM, Select Mode, Smart Serial, SmartTel and Total Endurance are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. ...

Page 24

... Via Quasimodo, 12 20025 Legnano (MI) Milan, Italy Tel: 39-0331-742611 Fax: 39-0331-466781 Netherlands Waegenburghtplein 4 NL-5152 JR, Drunen, Netherlands Tel: 31-416-690399 Fax: 31-416-690340 United Kingdom 505 Eskdale Road Winnersh Triangle Wokingham Berkshire, England RG41 5TU Tel: 44-118-921-5869 Fax: 44-118-921-5820 05/28/04  2004 Microchip Technology Inc. ...

Related keywords