25AA040A

• Max. clock 10 MHz
• Low-power CMOS technology
- Max Write Current: 5 mA at 5.5V, 10MHz
- Read Current: 5 mA at 5.5V, 10MHz
- Standby Current 5 A at 5.5V
• 512 x 8-bit organization
• Write Page mode (up to 16 bytes)
• Sequential Read
• Self-timed ERASE and WRITE cycles (5 msmax.)
• Block write protection
- Protect none, 1/4, 1/2 or all of array
• Built-in write protection
- Power-on/off data protection circuitry
- Write enable latch
- Write-protect pin
• High reliability
- Endurance: 1,000,000 erase/write cycles
- Data retention: > 200 years
- ESD protection: > 4000V
• Temperature ranges supported;
- Industrial (I): -40°C to +85°C
- Automotive (E): -40°C to +125°C
• Standard and Pb-free packages available

Absolute Maximum Ratings(†)
V_CC........................................................................................6.5V
All inputs and outputs w.r.t. V_SS .................. -0.6V to V_CC +1.0V
Storage temperature ........................................-65°C to 150°C
Ambient temperature under bias.......................-40°C to 125°C
ESD protection on all pins......................................................4 kV

† NOTICE: Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the
device. This is a stress rating only and functional operation of the device at those or any other conditions above those
indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions for an
extended period of time may affect device reliability.

The Microchip Technology Inc. 25XX040A* is a 4k-bit Serial Electrically Erasable Programmable Read-Only Memory (EEPROM). The memory is accessed via a simple Serial Peripheral Interface™ (SPI™) compatible serial bus. The bus signals required are a clock input (SCK) plus separate data in (SI) and data out (SO) lines. Access to the device is controlled through a Chip Select (CS) input.

Communication to 25XX040A* can be paused via the hold pin (HOLD). While the device is paused, transitions on its inputs will be ignored, with the exception ofChip Select, allowing the host to service higher priority interrupts.

The 25XX040A* is available in standard packagesincluding 8-lead PDIP and SOIC, and advanced packages including 8-lead MSOP, 8-lead TSSOPand rotated TSSOP. Pb-free (Pure Matte Sn) finish is also available.