Features: `Two-Wire Serial Interface, I2CTM compatible
-Bi-directional data transfer protoco
`Wide Voltage Operation
-Vcc = 1.8V to 5.5
`400 KHz (2.5V) and 1 MHz (5.0V) compatibility
`Low Power CMOS Technology
-Active Current less than 3 mA (2.5V
-Standby Current less than 20A (2.5
`Hardware Data Protection
-Write Protect Pi
`Sequential Read Feature
`Filtered Inputs for Noise Suppression
`Self time write cycle with auto clear
- 5 ms @ 2.5
`Organization:
-16Kx8 (256 pages of 64 bytes
-32Kx8 (512 pages of 64 bytes
`64 Byte Page Write Buffer
`High Reliability
-Endurance: 1,000,000 Cycle
-Data Retention: 40 Year
`Industrial and Automotive temperature ranges
`8-pin PDIP, 8-pin (JEDEC) SOIC, and 8-pin (EIAJ) SOIC packages
`Lead-free available
Pinout
Specifications
|
Symbol |
Parameter |
Value |
Unit |
| VS |
Supply Voltage |
-0.5 to +6.5 |
V |
| VP |
Voltage on Any Pin |
-0.5 to Vcc +0.5 |
V |
| TBIAS |
Temperature Under Bias |
-55 to +125 |
|
| TSTG |
Storage Temperature |
-65 to +150 |
|
| IOUT |
Output Current |
5 |
mA |
Notes:
1.Stresses violating the conditions listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only. Functional operation of the device outside these conditions or those indicated in the operational sections of this specification is not implied. Exposure to these conditions for extended periods may affect reliability.
DescriptionThe IS24C128A/256A is an electrically erasable PROM device that uses the standard 2-wire interface for communications. The IS24C128A is 128K-bit (16Kx8) and the IS24C256A is 256K-bit (32Kx8). These EEPROM are offered in a wide operating voltage range of 1.8V to 5.5V to be compatible with most application voltages. ISSI designed the IS24C128A/256A to be an efficient 2-wire EEPROM solution. The devices are packaged in 8-pin PDIP, 8-pin (JEDEC) SOIC, and 8-pin (EIAJ) SOIC.
The IS24C128A/256A maintains compatibility with the popular 2-wire bus protocol, so it is easy to design into applications implementing this bus type. The simple bus consists of the Serial Clock wire (SCL) and the Serial Data wire (SDA). Using the bus, a Master device such as a microcontroller is usually connected to one or more Slave devices such as the IS24C128A/256A.The bit stream over the SDA line includes a series of bytes, which identifies a particular Slave device, an instruction, an address within that Slave device, and a series of data, if appropriate. The IS24C128A/256A has a Write Protect pin (WP) to allow blocking of any write instruction transmitted over the bus.
IS24C256A Data Sheet
