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Xicor
Xicor

X24026X Datasheet Preview

X24026X Datasheet

Serial E2PROM

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X24026X pdf
ISO 7816 Compatible
2K
X24026
256 x 8 Bit
Serial E2PROM
FEATURES
• 2.7V to 5.5V Power Supply
• Low Power CMOS
—Active Current Less Than 1mA
—Standby Current Less Than 50µA
• Internally Organized 256 x 8
• Self Timed Write Cycle
—Typical Write Cycle Time of 5 ms
• 2 Wire Serial Interface
—Bidirectional Data Transfer Protocol
• Four Byte Page Write Operation
—Minimizes Total Write Time Per Byte
• High Reliability
—Endurance: 100,000 Cycles
—Data Retention: 100 Years
—ESD Protection > 2KV
DESCRIPTION
The X24026 is a CMOS 2048 bit serial E2PROM, inter-
nally organized 256 x 8. The X24026 features a serial
interface and software protocol allowing operation on a
simple two wire bus.
Xicor E2PROMs are designed and tested for applications
requiring extended endurance. Inherent data retention is
greater than 100 years. Available in DICE form with ISO
7816 compatible pinout.
FUNCTIONAL DIAGRAM
VCC
VSS
SDA
SCL
START
STOP
LOGIC
SLAVE ADDRESS
REGISTER
+COMPARATOR
START CYCLE
CONTROL
LOGIC
LOAD
INC
WORD
ADDRESS
COUNTER
XDEC
H.V. GENERATION
TIMING
& CONTROL
E2 PROM
64 X 32
R/W
DOUT
ACK
PIN
YDEC
8
CK DATA REGISTER DOUT
7020 FRM 01
©Xicor, Inc. 1994, 1995, 1996 Patents Pending
7020-1.2 2/24/97 T1/C0/D2 SH
1 Characteristics subject to change without notice




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Xicor

X24026X Datasheet Preview

X24026X Datasheet

Serial E2PROM

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X24026X pdf
X24026
PIN DESCRIPTIONS
Serial Clock (SCL)
The SCL input is used to clock all data into and out of the
device.
Serial Data (SDA)
SDA is a bidirectional pin used to transfer data into and
out of the device. It is an open drain output and may be
wire-ORed with any number of open drain or open
collector outputs.
An open drain output requires the use of a pull-up
resistor. For selecting typical values, refer to the
Guidelines for Calculating Typical Values of Bus Pull-Up
Resistors graph.
DIE CONFIGURATION
VSS
VCC
SDA
SCL
SDA
X24026 Die Revision A
.055 x .079
7020 FRM 02
PIN DESCRIPTIONS
Symbol
SDA
SCL
VSS
VCC
Description
Serial Data
Serial Clock
Ground
+5V
7020 FRM T01
2




Xicor
Xicor

X24026X Datasheet Preview

X24026X Datasheet

Serial E2PROM

No Preview Available !

X24026X pdf
X24026
DEVICE OPERATION
The X24026 supports a bidirectional bus oriented proto-
col. The protocol defines any device that sends data onto
the bus as a transmitter and the receiving device as the
receiver. The device controlling the transfer is a master
and the device being controlled is the slave. The master
will always initiate data transfers and provide the clock for
both transmit and receive operations. Therefore, the
X24026 will be considered a slave in all applications.
Figure 1. Data Validity
Clock and Data Conventions
Data states on the SDA line can change only during SCL
LOW. SDA state changes during SCL HIGH are reserved
for indicating start and stop conditions. Refer to Figures 1
and 2.
Start Condition
All commands are preceded by the start condition, which
is a HIGH to LOW transition of SDA when SCL is HIGH.
The X24026 continuously monitors the SDA and SCL
lines for the start condition and will not respond to any
command until this condition has been met.
SCL
SDA
DATA STABLE DATA
CHANGE
7020 FRM 03
3




Part Number X24026X
Description Serial E2PROM
Maker Xicor
Total Page 15 Pages
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