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CAT25256_12 Datasheet, PDF (1/20 Pages) ON Semiconductor – 256-Kb SPI Serial CMOS EEPROM | |||
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CAT25256
256-Kb SPI Serial CMOS
EEPROM
Description
The CAT25256 is a 256âKb Serial CMOS EEPROM device
internally organized as 32Kx8 bits. This features a 64âbyte page write
buffer and supports the Serial Peripheral Interface (SPI) protocol. The
device is enabled through a Chip Select (CS) input. In addition, the
required bus signals are clock input (SCK), data input (SI) and data
output (SO) lines. The HOLD input may be used to pause any serial
communication with the CAT25256 device. The device features
software and hardware write protection, including partial as well as
full array protection.
OnâChip ECC (Error Correction Code) makes the device suitable
for high reliability applications.*
Features
⢠20 MHz (5 V) SPI Compatible
⢠1.8 V to 5.5 V Supply Voltage Range
⢠SPI Modes (0,0) & (1,1)
⢠64âbyte Page Write Buffer
⢠Additional Identification Page with Permanent Write Protection
(New Product)
⢠Selfâtimed Write Cycle
⢠Hardware and Software Protection
⢠Block Write Protection
â Protect 1/4, 1/2 or Entire EEPROM Array
⢠Low Power CMOS Technology
⢠1,000,000 Program/Erase Cycles
⢠100 Year Data Retention
⢠Industrial and Extended Temperature Range
⢠8âlead PDIP, SOIC, TSSOP and 8âpad UDFN and TDFN Packages
⢠This Device is PbâFree, Halogen Free/BFR Free, and RoHS
Compliant
VCC
SI
CS
WP
HOLD
SCK
CAT25256
SO
VSS
Figure 1. Functional Symbol
* Available for New Product (Rev. E)
http://onsemi.com
SOICâ8
V SUFFIX
CASE 751BD
UDFNâ8
HU4 SUFFIX
CASE 517AZ
SOICâ8
X SUFFIX
CASE 751BE
PDIPâ8
L SUFFIX
CASE 646AA
TSSOPâ8
Y SUFFIX
CASE 948AL
TDFNâ8**
ZD2 SUFFIX
CASE 511AM
PIN CONFIGURATIONS
CS
1
SO
WP
VSS
VCC
HOLD
SCK
SI
PDIP (L), SOIC (V, X), TSSOP (Y),
UDFN (HU4), TDFN** (ZD2)
(Top View)
** Not recommended for new designs.
PIN FUNCTION
Pin Nameâ
Function
CS
Chip Select
SO
Serial Data Output
WP
Write Protect
VSS
Ground
SI
Serial Data Input
SCK
Serial Clock
HOLD
Hold Transmission Input
VCC
Power Supply
â 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 20 of this data sheet.
© Semiconductor Components Industries, LLC, 2012
1
September, 2012 â Rev. 7
Publication Order Number:
CAT25256/D
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