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X25020SI-2.7V Datasheet

  • X25020SI-2.7V

  • EEPROM

  • 130.84KB

  • 13頁

  • ETC

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Recommend System Management
Alternative: X5043
2K
X25020
SPI Serial EEPROM with Block Lock
鈩?/div>
Protection
DESCRIPTION
256 x 8 Bit
FEATURES
鈥?2MHz clock rate
鈥?SPI modes (0,0 & 1,1)
鈥?256 X 8 bits
鈥?6-byte page mode
鈥?Low power CMOS
鈥?0碌A standby current
鈥?mA active write current
鈥?2.7V To 5.5V power supply
鈥?Block lock protection
鈥擯rotect 1/4, 1/2 or all of EEPROM array
鈥?Built-in inadvertent write protection
鈥擯ower-up/power-down protection circuitry
鈥擶rite latch
鈥擶rite protect pin
鈥?Self-timed write cycle
鈥?ms write cycle time (typical)
鈥?High reliability
鈥擡ndurance: 1,000,000 cycles per byte
鈥擠ata retention: 100 years
鈥擡SD protection: 2000V on all pins
鈥?8-lead SOIC Package
BLOCK DIAGRAM
Direct Write
鈩?/div>
and Block Lock
鈩?/div>
Protection is a trademark of Xicor, Inc.
N
O
FO T
R RE
N C
EW O
M
D M
ES EN
IG D
ED
N
S
Status
Register
Write
Protect
Logic
X Decode
Logic
256 Byte
Array
4
4 X 128
SO
SI
SCK
CS
HOLD
Command
Decode
And
Control
Logic
4
4 X 128
16
16 X 128
WP
Write
Control
and
Timing
Logic
16
8
Y Decode
The X25020 is a CMOS 2048-bit serial EEPROM,
internally organized as 256 x 8. The X25020 features a
serial interface and software protocol, allowing opera-
tion on a simple three-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.
The X25020 also features two additional inputs that
provide the end user with added 鏗俥xibility. By asserting
the HOLD input, the X25020 will ignore transitions on
its inputs, thus allowing the host to service higher pri-
ority interrupts. The WP input can be used as a hard-
wire input to the X25020 (disabling all write attempts),
thus providing a mechanism for limiting end user capa-
bility of altering the memory.
The X25020 utilizes Xicor鈥檚 proprietary Direct Write
鈩?/div>
cell, providing a minimum endurance of 1,000,000
cycles per byte and a minimum data retention of 100
years.
Data Register
REV 1.1 7/12/00
www.xicor.com
Characteristics subject to change without notice.
1 of 13

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