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

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24LC256-I/SN

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

Specifications of 24LC256-I/SN

Memory Size
256K (32K x 8)
Package / Case
8-SOIC (3.9mm Width)
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
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/SN

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Quantity
Price
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MICROCHIP
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Part Number:
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Quantity:
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Device Selection Table
Features
• Low-power CMOS technology:
• 2-wire serial interface bus, I
• Cascadable for up to eight devices
• Self-timed erase/write cycle
• 64-byte Page Write mode available
• 5 ms max. write cycle time
• Hardware write-protect for entire array
• Output slope control to eliminate ground bounce
• Schmitt Trigger inputs for noise suppression
• 1,000,000 erase/write cycles
• Electrostatic discharge protection > 4000V
• Data retention > 200 years
• 8-pin PDIP, SOIC, TSSOP, MSOP and DFN
• Standard and Pb-free finishes available
• Temperature ranges:
Package Types
*24XX256 is used in this document as a generic part number for the 24AA256/24LC256/24FC256 devices.
 2004 Microchip Technology Inc.
Note 1:
24AA256
24LC256
24FC256
- Maximum write current 3 mA at 5.5V
- Maximum read current 400 A at 5.5V
- Standby current 100 nA typical at 5.5V
packages, 14-lead TSSOP package
- Industrial (I):
- Automotive (E):
Number
V
Note: * Pins A0 and A1 are no connects for the MSOP package only.
A0
A1
A2
SS
Part
2:
1
2
3
4
100 kHz for V
400 kHz for V
PDIP/SOIC
2.5-5.5V
1.8-5.5V
1.8-5.5V
Range
V
CC
8
7
6
5
256K I
CC
CC
V
WP
SCL
SDA
-40 C to +85 C
-40 C to +125 C
CC
Max. Clock
Frequency
< 2.5V.
< 2.5V.
400 kHz
2
1 MHz
400 kHz
C
V
A0
A1
A2
compatible
SS
(2)
(1)
2
24AA256/24LC256/24FC256
C
TSSOP/MSOP *
1
2
3
4
Ranges
Temp.
I, E
CMOS Serial EEPROM
I
I
8
7
6
5
V
WP
SCL
SDA
CC
Description
The Microchip Technology Inc. 24AA256/24LC256/
24FC256 (24XX256*) is a 32K x 8 (256 Kbit) Serial
Electrically Erasable PROM, capable of operation
across a broad voltage range (1.8V 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, DFN and 14-lead TSSOP
packages.
Block Diagram
V
SDA
NC
NC
NC
I/O
A0
A1
A2
SS
Control
Logic
V
V
CC
SS
I/O
1
2
3
4
5
6
7
SCL
TSSOP
A0 A1A2
14
13
12
10
Control
11
Memory
9
8
Logic
WP
V
WP
NC
NC
NC
SCL
SDA
CC
XDEC
V
A0
A1
A2
SS
1
2
3
4
DS21203M-page 1
DFN
HV Generator
Page Latches
Sense Amp.
R/W Control
EEPROM
Array
YDEC
8
7
6
5
V
WP
SCL
SDA
CC

Related parts for 24LC256-I/SN

24LC256-I/SN Summary of contents

Page 1

... SCL SDA 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.  2004 Microchip Technology Inc. 24AA256/24LC256/24FC256 2 ™ C CMOS Serial EEPROM Description The Microchip Technology Inc. 24AA256/24LC256/ 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 † NOTICE: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device ...

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: www.microchip.com.  2004 Microchip Technology Inc. 24AA256/24LC256/24FC256 Electrical Characteristics: Industrial (I +1.8V 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 C 100 Input filter spike suppression SP (SDA and SCL pins) ...

Page 5

... Function User Configurable Chip Select User Configurable Chip Select Not Connected User Configurable Chip Select Ground Serial Data Serial Clock Not Connected Write-Protect Input +1.8V to 5.5V (24AA256) +2.5V to 5.5V (24LC256) +1.8V to 5.5V (24FC256 left write operations are inhibited. Read DS21203M-page 5 ...

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.  2004 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 24XX256, this is set as ‘ 1010’ binary for read and write operations ...

Page 9

... don’t care bit K  2004 Microchip Technology Inc. 24AA256/24LC256/24FC256 pointer bits are internally incremented by one. If the master should transmit more than 64 bytes prior to generating the Stop condition, the address counter will roll over and the previously received data will be over- written ...

Page 10

... ACKNOWLEDGE POLLING Since the device will not acknowledge during a write cycle, this can be used to determine when the cycle is complete (This feature can be used to maximize bus throughput). Once the Stop condition for a Write command has been issued from the master, the device initiates the internally timed write cycle ...

Page 11

... SDA LINE BUS ACTIVITY  2004 Microchip Technology Inc. 24AA256/24LC256/24FC256 8.2 Random Read Random read operations allow the master to access any memory location in a random manner. To perform this type of read operation, the word address must first be set. This is done by sending the word address to the 24XX256 as part of a write operation (R/W bit set to ‘ ...

Page 12

... 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. DS21203M-page 12 Example: 24AA256 I/P017 0310 Example: 24LC256 I/SN0310 017 Example: 24LC256 I/SM 0310017 Example: 4LD I301 017  2004 Microchip Technology Inc. ...

Page 13

... STD 24AA256 4AD 24LC256 4LD 24FC256 4FD  2004 Microchip Technology Inc. 24AA256/24LC256/24FC256 Example: 4L256I 101017 Example 24LC256 I/MF YYWW NNN Example 24LC256I MSOP Package Codes Pb-free STD G4AD 4A256 G4LD 4L256 G4FD 4F256 : : 0110 017 Pb-free G4AD G4LD G4FD DS21203M-page 13 ...

Page 14

... Plastic Dual In-line (P) – 300 mil (PDIP Dimension Limits Number of Pins Pitch Top to Seating Plane Molded Package Thickness Base to Seating Plane Shoulder to Shoulder Width Molded Package Width Overall Length Tip to Seating Plane Lead Thickness Upper Lead Width Lower Lead Width ...

Page 15

... 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-012 Drawing No. C04-057  2004 Microchip Technology Inc. 24AA256/24LC256/24FC256 Units ...

Page 16

... Plastic Small Outline (SM) – Medium, 208 mil (SOIC Dimension Limits Number of Pins Pitch Overall Height Molded Package Thickness Standoff § Overall Width Molded Package Width Overall Length Foot Length Foot Angle Lead Thickness Lead Width Mold Draft Angle Top ...

Page 17

... 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 .005” (0.127mm) per side. JEDEC Equivalent: MO-153 Drawing No. C04-086  2004 Microchip Technology Inc. 24AA256/24LC256/24FC256 Units ...

Page 18

... Plastic Thin Shrink Small Outline (ST) – 4.4 mm (TSSOP Dimension Limits Number of Pins Pitch Overall Height Molded Package Thickness Standoff § Overall Width Molded Package Width Molded Package Length Foot Length Foot Angle Lead Thickness Lead Width Mold Draft Angle Top ...

Page 19

... Mold Draft Angle Top Mold Draft Angle Bottom *Controlling Parameter 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: MO-187 Drawing No. C04-111  2004 Microchip Technology Inc. 24AA256/24LC256/24FC256 φ Units ...

Page 20

... Plastic Dual Flat No Lead Package (MF) 6x5 mm Body (DFN- TOP VIEW A1 Units Dimension Limits Number of Pins Pitch Overall Height Molded Package Thickness Standoff Base Thickness Overall Length Molded Package Length Exposed Pad Length Overall Width Molded Package Width Exposed Pad Width ...

Page 21

... APPENDIX A: REVISION HISTORY Revision L Corrections to Section 1.0, Electrical Characteristics. Revision M Added 1.8V 400 kHz option for 24FC256.  2004 Microchip Technology Inc. 24AA256/24LC256/24FC256 DS21203M-page 21 ...

Page 22

... NOTES: DS21203M-page 22  2004 Microchip Technology Inc. ...

Page 23

... Conferences for products, Development Systems, technical information and more • Listing of seminars and events  2004 Microchip Technology Inc. 24AA256/24LC256/24FC256 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 24

... 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 25

... C Serial 1.8V, TSSOP package 24AA256-I/MS: C Serial 1.8V, MSOP package 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: 1.8V, High Speed, PDIP package. j) 24FC256-I/SN: 1 ...

Page 26

... NOTES: DS21203M-page 26  2004 Microchip Technology Inc. ...

Page 27

... 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 28

... 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. ...

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