24LC256-I/ST Microchip Technology, 24LC256-I/ST Datasheet

IC EEPROM 256KBIT 400KHZ 8TSSOP

24LC256-I/ST

Manufacturer Part Number
24LC256-I/ST
Description
IC EEPROM 256KBIT 400KHZ 8TSSOP
Manufacturer
Microchip Technology
Datasheets

Specifications of 24LC256-I/ST

Memory Size
256K (32K x 8)
Package / Case
8-TSSOP
Operating Temperature
-40°C ~ 85°C
Format - Memory
EEPROMs - Serial
Memory Type
EEPROM
Speed
400kHz
Interface
I²C, 2-Wire Serial
Voltage - Supply
2.5 V ~ 5.5 V
Organization
32 K x 8
Interface Type
I2C
Maximum Clock Frequency
0.4 MHz
Access Time
900 ns
Supply Voltage (max)
5.5 V
Supply Voltage (min)
2.5 V
Maximum Operating Current
3 mA
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Operating Supply Voltage
2.5 V, 5.5 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Other names
24LC256I/ST
256K I
Device Selection Table
Part
V
Max. Clock
CC
Number
Range
Frequency
24AA256
1.7-5.5V
400 kHz
24LC256
2.5-5.5V
400 kHz
(2)
24FC256
1.7-5.5V
1 MHz
Note 1:
100 kHz for V
< 2.5V.
CC
2:
400 kHz for V
< 2.5V.
CC
Features:
• Single Supply with Operation Down to 1.7V for
24AA256 and 24FC256 Devices, 2.5V for
24LC256 Devices
• Low-Power CMOS Technology:
- Active current 400 uA, typical
- Standby current 100 nA, typical
2
• 2-Wire Serial Interface, I
C
Compatible
• Cascadable up to Eight Devices
• Schmitt Trigger Inputs for Noise Suppression
• Output Slope Control to Eliminate Ground Bounce
• 100 kHz and 400 kHz Clock Compatibility
• Page Write Time 5 ms max.
• Self-Timed Erase/Write Cycle
• 64-Byte Page Write Buffer
• Hardware Write-Protect
• ESD Protection >4000V
• More than 1 Million Erase/Write Cycles
• Data Retention >200 years
• Factory Programming Available
• Packages Include 8-lead PDIP, SOIC, DFN,
TSSOP and MSOP
• Pb-Free and RoHS Compliant
Package Types
PDIP/SOIC
A0
1
8
V
CC
A1
2
7
WP
A2
3
6
SCL
V
4
5
SDA
SS
Note: * Pins A0 and A1 are no connects for the MSOP package only.
*24XX256 is used in this document as a generic part number for the 24AA256/24LC256/24FC256 devices.
 2010 Microchip Technology Inc.
24AA256/24LC256/24FC256
2
C
CMOS Serial EEPROM
• Temperature Ranges:
- Industrial (I):
Temp.
- Automotive (E):
Ranges
(1)
I
Description:
I, E
The Microchip Technology Inc. 24AA256/24LC256/
I
24FC256 (24XX256*) is a 32K x 8 (256 Kbit) Serial
Electrically Erasable PROM, capable of operation
across a broad voltage range (1.7V to 5.5V). It has
been developed for advanced, low-power applications
such as personal communications or data acquisition.
This device also has a page write capability of up to 64
bytes of data. This device is capable of both random
and sequential reads up to the 256K boundary.
Functional address lines allow up to eight devices on
the same bus, for up to 2 Mbit address space. This
device is available in the standard 8-pin plastic DIP,
SOIC, TSSOP, MSOP and DFN packages.
Block Diagram
I/O
Control
Logic
I/O
SCL
SDA
V
CC
V
SS
TSSOP/MSOP*
1
8
A0
V
CC
2
7
A1
WP
3
6
A2
SCL
4
5
V
SDA
SS
-40C to +85C
-40C to +125C
A0 A1A2
WP
HV Generator
Memory
EEPROM
Control
XDEC
Array
Logic
Page Latches
YDEC
Sense Amp.
R/W Control
DFN
A0
1
8
V
CC
2
A1
7
WP
A2
3
6
SCL
4
V
5
SDA
SS
DS21203Q-page 1

Related parts for 24LC256-I/ST

24LC256-I/ST Summary of contents

Page 1

... SCL SDA SS Note: * Pins A0 and A1 are no connects for the MSOP package only. *24XX256 is used in this document as a generic part number for the 24AA256/24LC256/24FC256 devices.  2010 Microchip Technology Inc. 24AA256/24LC256/24FC256 2 C CMOS Serial EEPROM ™ • Temperature Ranges: - Industrial (I): Temp ...

Page 2

... ELECTRICAL CHARACTERISTICS (†) Absolute Maximum Ratings V .............................................................................................................................................................................6.5V 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  † ...

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™ Model, which can be obtained from Microchip’s web site at www.microchip.com.  2010 Microchip Technology Inc. 24AA256/24LC256/24FC256 Electrical Characteristics: Industrial (I +1.7V to 5.5V CC ...

Page 4

... AC CHARACTERISTICS (Continued) Param. Sym. Characteristic No Output valid from clock AA (Note Bus free time: Time the bus BUF must be free before a new transmission can start 15 T Output fall time from V OF minimum to V maximum IL  100 Input filter spike suppression SP (SDA and SCL pins) ...

Page 5

... Not Connected Write-Protect Input +1.7V to 5.5V (24AA256) +2.5V to 5.5V (24LC256) +1.7V to 5.5V (24FC256) 2.3 Serial Clock (SCL) This input is used to synchronize the data transfer to and from the device. 2.4 Write-Protect (WP) This pin must be connected to either write operations are enabled. If tied to V ...

Page 6

... 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. Changes in the data line, while the clock line is high, will be interpreted as a Start or Stop condition ...

Page 7

... SCL SDA Data from transmitte Transmitter must release the SDA line at this point, allowing the Receiver to pull the SDA line low to acknowledge the previous eight bits of data.  2010 Microchip Technology Inc. 24AA256/24LC256/24FC256 (D) (D) Address or Data Acknowledge Allowed Valid to Change ...

Page 8

... DEVICE ADDRESSING A control byte is the first byte received following the Start condition from the master device (Figure 5-1). The control byte consists of a 4-bit control code. For the 1010’ 24XX256, this is set as ‘ binary for read and write operations. The next three bits of the control byte are the Chip Select bits (A2, A1, A0) ...

Page 9

... Microchip Technology Inc. 24AA256/24LC256/24FC256 6.3 Write Protection The WP pin allows the user to write-protect the entire array (0000-7FFF) when the pin is tied the write protection is disabled ...

Page 10

... FIGURE 6-1: BYTE WRITE S Bus Activity T Control Master A Byte R SDA Line Bus Activity x = “don’t care” bit FIGURE 6-2: PAGE WRITE S Bus Activity T Control Master A Byte R T SDA Line Bus Activity “don’t care” bit K DS21203Q-page 10 Address Address ...

Page 11

... If the cycle is complete, then the device will return the ACK and the master can then proceed with the next Read or Write command. See Figure 7-1 for flow diagram.  2010 Microchip Technology Inc. 24AA256/24LC256/24FC256 FIGURE 7-1: Write Command Send Stop Condition to ...

Page 12

... READ OPERATION Read operations are initiated in much the same way as write operations, with the exception that the R/W bit of the control byte is set to ‘ 1 ’. There are three basic types of read operations: current address read, random read and sequential read. ...

Page 13

... Microchip part number, year code, week code, and traceability code. For device marking beyond this, certain price adders apply. Please check with your Microchip Sales Office.  2010 Microchip Technology Inc. 24AA256/24LC256/24FC256 Example: 24AA256 I/P e Example: 24LC256I Example: 24LC256 I/SM 0510017 017 3 0510 0510 017 e 3 DS21203Q-page 13 ...

Page 14

... YYWW NNN Part No. 24AA256 24LC256 24FC256 DS21203Q-page 14 Example: Example: 4L256I 510017 Example First Line Marking Codes TSSOP Package Codes MSOP Package Codes 4AD 4A256T 4LD 4L256T 4FD 4F256T 4LD I510 017 : 24LC256 e 3 I/MF 0510 017  2010 Microchip Technology Inc. ...

Page 15

... N NOTE  2010 Microchip Technology Inc. 24AA256/24LC256/24FC256 DS21203Q-page 15 ...

Page 16

... N NOTE DS21203Q-page φ α c β  2010 Microchip Technology Inc. ...

Page 17

... Microchip Technology Inc. 24AA256/24LC256/24FC256 DS21203Q-page 17 ...

Page 18

... Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging DS21203Q-page 18  2010 Microchip Technology Inc. ...

Page 19

... Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging  2010 Microchip Technology Inc. 24AA256/24LC256/24FC256 DS21203Q-page 19 ...

Page 20

... Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging DS21203Q-page 20  2010 Microchip Technology Inc. ...

Page 21

... D N NOTE  2010 Microchip Technology Inc. 24AA256/24LC256/24FC256 φ L DS21203Q-page 21 ...

Page 22

... Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging DS21203Q-page 22  2010 Microchip Technology Inc. ...

Page 23

... D N NOTE  2010 Microchip Technology Inc. 24AA256/24LC256/24FC256 φ L DS21203Q-page 23 ...

Page 24

... Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging DS21203Q-page 24  2010 Microchip Technology Inc. ...

Page 25

... D N NOTE TOP VIEW A3  2010 Microchip Technology Inc. 24AA256/24LC256/24FC256 EXPOSED PAD BOTTOM VIEW A A1 NOTE NOTE DS21203Q-page 25 ...

Page 26

... DS21203Q-page 26  2010 Microchip Technology Inc. ...

Page 27

... Revised Sections 2.1 and 2.4. Removed 14-Lead TSSOP Package. Revision P Revised Features; Changed 1.8V voltage to 1.7V; Replaced Package Drawings; Revised markings (8-lead SOIC); Revised Product ID System. Revision Q (05/10) Revised Table 1-1, Table 1-2, Section 6.1; Updated Package Drawings.  2010 Microchip Technology Inc. 24AA256/24LC256/24FC256 DS21203Q-page 27 ...

Page 28

... NOTES: DS21203Q-page 28  2010 Microchip Technology Inc. ...

Page 29

... To register, access the Microchip web site at www.microchip.com, click on Customer Change Notification and follow the registration instructions.  2010 Microchip Technology Inc. 24AA256/24LC256/24FC256 CUSTOMER SUPPORT Users of Microchip products can receive assistance through several channels: • Distributor or Representative • ...

Page 30

... Telephone: (_______) _________ - _________ Application (optional): Would you like a reply? Y Device: 24AA256/24LC256/24FC256 Questions: 1. What are the best features of this document? 2. How does this document meet your hardware and software development needs you find the organization of this document easy to follow? If not, why? 4 ...

Page 31

... C Serial e) 24LC256-E/P: 2.5V, PDIP package Serial f) 24LC256-I/SN: 2.5V, SOIC package Serial g) 24LC256T-I/SN: Tape and Reel, Industrial Temp., 2.5V, SOIC package. h) 24LC256-I/MS: 2.5V, MSOP package. i) 24FC256-I/P: 1.7V, High Speed, PDIP package. j) 24FC256-I/SN: 1.7V, High Speed, SOIC package. k) 24FC256T-I/SN: Tape and Reel, Industrial Temp, 1 ...

Page 32

... NOTES: DS21203Q-page 32  2010 Microchip Technology Inc. ...

Page 33

... PICtail, REAL ICE, rfLAB, Select Mode, Total Endurance, TSHARC, UniWinDriver, WiperLock and ZENA 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 34

... Fax: 886-3-6578-370 Taiwan - Kaohsiung Tel: 886-7-536-4818 Fax: 886-7-536-4803 Taiwan - Taipei Tel: 886-2-2500-6610 Fax: 886-2-2508-0102 Thailand - Bangkok Tel: 66-2-694-1351 Fax: 66-2-694-1350  2010 Microchip Technology Inc. EUROPE Austria - Wels Tel: 43-7242-2244-39 Fax: 43-7242-2244-393 Denmark - Copenhagen Tel: 45-4450-2828 Fax: 45-4485-2829 France - Paris Tel: 33-1-69-53-63-20 ...

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