X24641 Datasheet, PDF (1/13 Pages) Xicor Inc. – 400 KHz 2-Wire Serial E 2 PROM

64K
X24641
8K x 8 Bit
400 KHz 2-Wire Serial E²PROM
FEATURES
• 1.8V to 3.6V, 2.5V to 5.5V and 4.5V to 5.5V
Power Supply Operation
• Low Power CMOS
—Active Read Current Less Than 1mA
—Active Write Current Less Than 3mA
—Standby Current Less Than 1µA
• 400KHz Fast Mode 2-Wire Serial Interface
—Down to 1.8V
—Schmitt Trigger Input Noise Suppression
—Output Slope Control for Ground Bounce
Noise Elimination
• Internally Organized 8K x 8
• 32 Byte Page Write Mode
—Minimizes Total Write Time Per Byte
• Hardware Write Protect
• Bidirectional Data Transfer Protocol
• Self-Timed Write Cycle
—Typical Write Cycle Time of 5ms
• High Reliability
—Endurance: 1,000,000 Cycles
—Data Retention: 100 Years
• 8-Lead SOIC
DESCRIPTION
The X24641 is a CMOS Serial E²PROM Memory,
internally organized 8K x 8. The device features a
serial interface and software protocol allowing opera-
tion on a simple two wire bus. The bus operates at
400KHz all the way down to 1.8V.
Three device select inputs (S₀–S₂) allow up to eight
devices to share a common two wire bus.
Hardware Write Protection is provided through a Write
Protect (WP) input pin on the X24641. When the WP
pin is HIGH, the upper quadrant of the Serial E²PROM
array is protected against any nonvolatile write
attempts.
Xicor Serial E²PROM Memories are designed and
tested for applications requiring extended endurance.
Inherent data retention is greater than 100 years.
FUNCTIONAL DIAGRAM
SERIAL E²PROM DATA
AND ADDRESS (SDA)
SCL
COMMAND
DECODE
AND
CONTROL
LOGIC
S2
DEVICE
S1
SELECT
LOGIC
S0
PAGE
DECODE
LOGIC
WRITE
PROTECT
LOGIC
DATA REGISTER
Y DECODE LOGIC
E²PROM
ARRAY
8K x 8
WRITE VOLTAGE
WP
CONTROL
7026 FM 01
©Xicor, 1995, 1996 Patents Pending
7026 3/27/97 T0/C0/D0 SH
Characteristics subject to change without notice
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