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DS28CZ04
4Kb I2C/SMBus EEPROM
with Nonvolatile PIO
www.maxim-ic.com
GENERAL DESCRIPTION
The DS28CZ04 combines 4Kb (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 power-on
state of PIO programmed as outputs is stored in non-
volatile memory. All PIO may be reconfigured by the
user through the serial interface.
APPLICATIONS
? 4G SFP Copper Modules
? SFF-8472, SFP Fiber Modules
? RAID Systems
? Servers
TYPICAL OPERATING CIRCUIT
FEATURES
4Kb (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 Communica-
tion Speeds
Operating Range: 2.0V to 5.25V, -40°C to +85°C
4mm x 4mm 12-Pin TQFN Package
ORDERING INFORMATION
PART TEMP RANGE PIN-PACKAGE
V CC T
DS28CZ04G-4+
-40 ° C to +85 ° C
TQFN12-EP * 4x4mm2
MOD-DEF2
MOD-DEF1
V CC
DS28CZ04
SDA
SCL
MRZ
V CC1 V CC2
MAX3982
DS28CZ04G-4+T -40 ° C to +85 ° C
*EP = Exposed Paddle
+Denotes lead-free package.
TQFN12-EP * 4x4mm2
Tape-and-Reel
LOS
(from receiver)
PIO0
WP
A2
A1 GND
PIO3
PIO2
PIO1
PE1
PE0
OUTLEV
IN+
IN-
LOS
OUT+
OUT-
PIN CONFIGURATION
V EE T
From SFP
connector
TX_DISABLE
GND
LOSLEV
EP
Connect to
V CC or GND
12
11
10
V EE T
Small Form-factor Pluggable (SFP) Circuit
SMBus is a trademark of Intel Corp.
A1 1
A2 2
PIO3 3
9 WP
8 MRZ
7 VCC
4
5
6
Thin 12-Lead 4mm × 4mm QFN (Top View)
Package Outline Drawing 21-0139
Package Code T1244+4
Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata .
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REV: 061107
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