CAT25256LI-G Datasheet, PDF (1/20 Pages) ON Semiconductor – 256-Kb SPI Serial CMOS EEPROM

CAT25256
256-Kb SPI Serial CMOS
EEPROM
Description
The CAT25256 is a 256−Kb Serial CMOS EEPROM device
internally organized as 32Kx8 bits. This features a 64−byte 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.
On−Chip 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)
• 64−byte Page Write Buffer
• Additional Identification Page with Permanent Write Protection
(New Product)
• Self−timed Write Cycle
• Hardware and Software Protection
• Block Write Protection
− 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
• 8−lead PDIP, SOIC, TSSOP and 8−pad UDFN and TDFN Packages
• This Device is Pb−Free, Halogen Free/BFR Free, and RoHS
Compliant
V_CC
SI
CS
WP
HOLD
SCK
CAT25256
SO
V_SS
Figure 1. Functional Symbol
* Available for New Product (Rev. E)
http://onsemi.com
SOIC−8
V SUFFIX
CASE 751BD
UDFN−8
HU4 SUFFIX
CASE 517AZ
SOIC−8
X SUFFIX
CASE 751BE
PDIP−8
L SUFFIX
CASE 646AA
TSSOP−8
Y SUFFIX
CASE 948AL
TDFN−8**
ZD2 SUFFIX
CASE 511AM
PIN CONFIGURATIONS
CS
1
SO
WP
V_SS
V_CC
HOLD
SCK
SI
PDIP (L), SOIC (V, X), TSSOP (Y),
UDFN (HU4), TDFN** (ZD2)
(Top View)
** Not recommended for new designs.
PIN FUNCTION
Pin Name^†
Function
CS
Chip Select
SO
Serial Data Output
WP
Write Protect
V_SS
Ground
SI
Serial Data Input
SCK
Serial Clock
HOLD
Hold Transmission Input
V_CC
Power Supply
†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 − Rev. 7
Publication Order Number:
CAT25256/D