DS28CZ04

Features:

4kbit (512 x 8) EEPROM Organized in Two 256- Byte Blocks
Single Byte and up to 16-Byte EEPROM Write Sequences
Write-Protect Control Pin for the Entire EEPROM Array
Endurance 200k Cycles per Block at 25°C; 10ms max EEPROM Write Cycle
4 PIO Lines
Each PIO is Configured to Input or Output Mode on Startup by Stored Value
All PIOs are Reconfigurable after Startup
Serial Interface User-Programmable for I²C Bus and SMBus Compatibility
Supports 100kHz and 400kHz I²C Communication Speeds
Operating Range: 2.0V to 5.25V, -40°C to +85°C
4mm x 4mm 12-Pin TQFN Package


Application

• 4G SFP Copper Modules
• SFF-8472, SFP Fiber Modules
• RAID Systems
• Servers


Pinout




Specifications

Voltage Range on Any Pin Relative to Ground ......................... -0.5V, +6V
Maximum Current SDA, SCL, A2, A1, WP, MRZ Pin ................... ±20mA
Maximum Current each PIO Pin ............................................... ±20mA
Maximum GND and V_CC Current .............................................. 100mA
Operating Temperature Range ............................................... -40°C to +85°C
Junction Temperature ............................................................. +150°C
Storage Temperature Range .................................................. -55°C to +125°C
Soldering Temperature ........................................................... See IPC/JEDEC J-STD-020

Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to the absolute maximum rating conditions for extended periods may affect device.


Description

The DS28CZ04 combines 4kbit (512 x 8) EEPROM with 4 PIO lines. Communication with the device is accomplished with an industry standard I²C and SMBus™ interface. The memory is organized as two segments of 256 bytes with single byte and up to 16- byte block write capability. Individual PIO lines may be configured as inputs or outputs. The DS28CZ04 power-on state of PIO programmed as outputs is stored in nonvolatile memory. All PIO may be reconfigured by the user through the serial interface.