DS28CZ04 Datasheet, PDF (1/22 Pages) Maxim Integrated Products – 4kbit I²C/SMBus EEPROM with Nonvolatile PIO

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GENERAL 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 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
VCCT
MOD-DEF2
MOD-DEF1
LOS
(from receiver)
VEET
VCC
DS28CZ04
SDA
SCL
MRZ
PIO3
PIO0 PIO2
WP
PIO1
A2
A1 GND
From SFP
connector
VCC1
VCC2
MAX3982
PE1
PE0
OUTLEV
IN+
IN-
TX_DISABLE
LOS
OUT+
OUT-
LOSLEV
GND
EP
VEET
Connect to
VCC or GND
Small Form-factor Pluggable (SFP) Circuit
SMBus is a trademark of Intel Corp.
DS28CZ04
4kbit I²C/SMBus EEPROM
with Nonvolatile PIO
FEATURES
ƒ 4kbit (512 x 8) EEPROM Organized in Two 256-
Byte Blocks
ƒ Single Byte and up to 16-Byte EEPROM Write
Sequences
ƒ Write-Protect Control Pin for the Entire EEPROM
Array
ƒ Endurance 200k Cycles per Block at 25°C; 10ms
max EEPROM Write Cycle
ƒ 4 PIO Lines
ƒ Each PIO is Configured to Input or Output Mode
on Startup by Stored Value
ƒ All PIOs are Reconfigurable after Startup
ƒ Serial Interface User-Programmable for I²C Bus
and SMBus Compatibility
ƒ Supports 100kHz and 400kHz I²C Communica-
tion Speeds
ƒ Operating Range: 2.0V to 5.25V, -40°C to +85°C
ƒ 4mm x 4mm 12-Pin TQFN Package
ORDERING INFORMATION
PART
TEMP RANGE PIN-PACKAGE
DS28CZ04G-4+
-40°C to +85°C TQFN12-EP^* 4x4mm²
DS28CZ04G-4+T
-40°C to +85°C
TQFN12-EP^* 4x4mm²
Tape-and-Reel
*EP = Exposed Paddle
+Denotes lead-free package.
PIN CONFIGURATION
12 11 10
A1 1
9 WP
A2 2
8 MRZ
PIO3 3
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