4K
512 x 8 Bit
X25057
5MHz Low Power SPI Serial E2PROM with IDLock™ Memory
DESCRIPTION
FEATURES
TheX25057isaCMOS4K-bitserialE2PROM,internally
organized as 512 x 8. The X25057 features a Serial
Peripheral Interface (SPI) and software protocol
allowing operation on a simple four-wire bus. The bus
signals 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, allowing any
number of devices to share the same bus.
• 5MHz Clock Rate
• IDLock™ Memory
—IDLock First or Last Page, Any 1/4 or Lower 1/2
of E2PROM Array
• Low Power CMOS
—<1µA Standby Current
—<3mA Active Current during Write
—<400µA Active Current during Read
• 1.8V to 3.6V, 2.7V-5.5V or 4.5V to 5.5V Operation
• Built-in Inadvertent Write Protection
—Power-Up/Power-Down Protection Circuitry
—Write Enable Latch
—Write Protect Pin
• SPI Modes (0,0 & 1,1)
• 512 x 8 Bits
—16 Byte Page Mode
• Self-Timed Write Cycle
—5ms Write Cycle Time (Typical)
• High Reliability
—Endurance: 100,000 Cycles/Byte
—Data Retention: 100Years
—ESD: 2000V on all pins
• 8-Lead MSOP Package
IDLock is a programmable locking mechanism which
allows the user to lock system ID and parametric data in
different portions of the E2PROM memory space,
ranging from as little as one page to as much as 1/2 of
the total array. The X25057 also features a WP pin that
can be used for hardwire protection of the part, disabling
all write attempts, as well as a Write Enable Latch that
must be set before a write operation can be initiated.
The X25057 utilizes Xicor’s proprietary Direct WriteTM
cell, providing a minimum endurance of 100,000 cycles
per byte and a minimum data retention of 100 years.
• 8-Lead TSSOP Package
• 8-Lead SOIC Package
• 8-Lead PDIP Package
FUNCTIONAL DIAGRAM
DATA REGISTER
SI
Y DECODE LOGIC
SO
16
8
COMMAND
DECODE
AND
CONTROL
LOGIC
X
32
SCK
CS
DECODE
LOGIC
4K E2PROM
ARRAY
(512 x 8)
HIGH VOLTAGE
CONTROL
WP
WRITE CONTROL LOGIC
7033 FRM F01
Xicor, Inc. 1994 – 1997 Patents Pending
7033-1.1 5/8/97 T1/C0/D0 SH
Characteristics subject to change without notice
1
XICOR [ XICOR INC. ]
