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PDF CAT24C256 Data sheet ( Hoja de datos )
| Número de pieza | CAT24C256 | |
| Descripción | 256kb I2C CMOS Serial EEPROM | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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CAT24C256
256 kb I2C CMOS Serial
EEPROM
Description
The CAT24C256 is a 256 kb Serial CMOS EEPROM, internally
organized as 32,768 words of 8 bits each.
It features a 64−byte page write buffer and supports the Standard
(100 kHz), Fast (400 kHz) and Fast−Plus (1 MHz) I2C protocol.
Write operations can be inhibited by taking the WP pin High (this
protects the entire memory).
External address pins make it possible to address up to eight
CAT24C256 devices on the same bus.
On−Chip ECC (Error Correction Code) makes the device suitable
for high reliability applications.*
Features
• Supports Standard, Fast and Fast−Plus I2C Protocol
• 1.8 V to 5.5 V Supply Voltage Range
• 64−Byte Page Write Buffer
• Hardware Write Protection for Entire Memory
• Schmitt Triggers and Noise Suppression Filters on I2C Bus Inputs
(SCL and SDA)
• Low Power CMOS Technology
• 1,000,000 Program/Erase Cycles
• 100 Year Data Retention
• Industrial and Extended Temperature Range
• PDIP, SOIC, TSSOP, MSOP 8−Lead and
TDFN, UDFN 8−Pad Packages
• This Device is Pb−Free, Halogen Free/BFR Free, and RoHS
Compliant
VCC
SCL
A2, A1, A0
WP
CAT24C256
SDA
VSS
Figure 1. Functional Symbol
* Available for New Product (Rev. E)
© Semiconductor Components Industries, LLC, 2014
January, 2014 − Rev. 14
1
http://onsemi.com
TDFN−8**
ZD2 SUFFIX
CASE 511AM
TSSOP−8
Y SUFFIX
CASE 948AL
PDIP−8
L SUFFIX
CASE 646AA
SOIC−8
X SUFFIX
CASE 751BE
SOIC−8
W SUFFIX
CASE 751BD
UDFN−8
HU4 SUFFIX
CASE 517AZ
MSOP−8
Z SUFFIX
CASE 846AD
PIN CONFIGURATION
A0 1
A1
VCC
WP
A2 SCL
VSS SDA
PDIP (L), SOIC (W, X), TSSOP (Y),
TDFN (ZD2)**, UDFN (HU4), MSOP (Z)
For the location of Pin 1, please consult the
corresponding package drawing.
** Not recommended for new designs
PIN FUNCTION
Pin Name†
Function
A0, A1, A2
SDA
Device Address
Serial Data
SCL Serial Clock
WP Write Protect
VCC Power Supply
VSS Ground
†The exposed pad for the TDFN/UDFN packages can
be left floating or connected to Ground.
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 18 of this data sheet.
Publication Order Number:
CAT24C256/D
1 page  
CAT24C256
Table 9. A.C. CHARACTERISTICS − New Product (Rev E) (Notes 14, 15)
(VCC = 1.8 V to 5.5 V, TA = −40°C to +85°C and VCC = 2.5 V to 5.5 V, TA = −40°C to +125°C, unless otherwise specified.)
Standard
VCC = 1.8 V − 5.5 V
Fast
VCC = 1.8 V − 5.5 V
Fast−Plus
VCC = 2.5 V − 5.5 V
TA = −405C to +855C
Symbol
Parameter
Min Max Min Max Min Max
FSCL
Clock Frequency
100 400 1,000
tHD:STA
START Condition Hold Time
4
0.6 0.25
tLOW
Low Period of SCL Clock
4.7
1.3 0.45
tHIGH
High Period of SCL Clock
4
0.6 0.40
tSU:STA
START Condition Setup Time
4.7
0.6 0.25
tHD:DAT
Data In Hold Time
0
0
0
tSU:DAT
Data In Setup Time
250
100
50
tR (Note 16)
SDA and SCL Rise Time
1,000
300
100
tF (Note 16)
SDA and SCL Fall Time
300 300 100
tSU:STO
STOP Condition Setup Time
4
0.6 0.25
tBUF
Bus Free Time Between
STOP and START
4.7
1.3
0.5
tAA SCL Low to Data Out Valid 3.5 0.9 0.40
tDH Data Out Hold Time
50
50
50
Ti (Note 16)
Noise Pulse Filtered at SCL
50
50
50
and SDA Inputs
tSU:WP
tHD:WP
tWR
tPU
(Notes 16, 17)
WP Setup Time
WP Hold Time
Write Cycle Time
Power-up to Ready Mode
0
2.5
5
1
0
2.5
5
1
0
1
5
0.1 1
14. Test conditions according to “A.C. Test Conditions” table.
15. The New product Rev E is identified by letter “E” or a dedicated marking code on top of the package.
16. Tested initially and after a design or process change that affects this parameter.
17. tPU is the delay between the time VCC is stable and the device is ready to accept commands.
Units
kHz
ms
ms
ms
ms
ms
ns
ns
ns
ms
ms
ms
ns
ns
ms
ms
ms
ms
http://onsemi.com
5
5 Page 
PIN # 1
IDENTIFICATION
D
TOP VIEW
CAT24C256
PACKAGE DIMENSIONS
PDIP−8, 300 mils
CASE 646AA−01
ISSUE A
SYMBOL MIN
NOM
MAX
A 5.33
A1 0.38
A2 2.92 3.30 4.95
b 0.36 0.46 0.56
E1 b2 1.14 1.52 1.78
c 0.20 0.25 0.36
D 9.02 9.27 10.16
E 7.62 7.87 8.25
E1 6.10 6.35 7.11
e 2.54 BSC
eB 7.87
10.92
L 2.92 3.30 3.80
E
A2
A
A1
b2
L
c
e
SIDE VIEW
Notes:
(1) All dimensions are in millimeters.
(2) Complies with JEDEC MS-001.
b
eB
END VIEW
http://onsemi.com
11
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| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet CAT24C256.PDF ] | |
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