© Semiconductor Components Industries, LLC, 2012
September, 2012 − Rev. 7
1 Publication Order Number:
CAT25128/D
CAT25128
128-Kb SPI Serial CMOS
EEPROM
Description
The CAT25128 is a 128−Kb Serial CMOS EEPROM device
internally organized as 16Kx8 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 CAT25128 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 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
• 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 TDFN, UDFN Packages
• This Device is Pb−Free, Halogen Free/BFR Free, and RoHS
Compliant
SI
SOCAT25128
SCK
V
SS
V
CC
CS
WP
HOLD
Figure 1. Functional Symbol
* Available for New Product (Rev. E)
http://onsemi.com
PIN CONFIGURATION
SI
HOLD
V
CC
V
SS
WP
SO
CS
1
See detailed ordering and shipping information in the package
dimensions section on page 19 of this data sheet.
ORDERING INFORMATION
SOIC−8
V SUFFIX
CASE 751BD
TDFN−8**
VP2 SUFFIX
CASE 511AK
SCK
PDIP (L), SOIC (X, V),
TSSOP (Y), TDFN** (VP2), UDFN (HU4)
PDIP−8
L SUFFIX
CASE 646AA
TSSOP−8
Y SUFFIX
CASE 948AL
Chip SelectCS
Serial Data OutputSO
Write ProtectWP
GroundV
SS
Serial Data InputSI
Serial ClockSCK
FunctionPin Name
†
PIN FUNCTION
Hold Transmission InputHOLD
Power SupplyV
CC
UDFN−8
HU4 SUFFIX
CASE 517AZ
** The TDFN−8 (VP2) package is not recommended
for new designs.
SOIC−8
X SUFFIX
CASE 751BE
†The exposed pad for the TDFN/UDFN packages can
be left floating or connected to Ground.
