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X25080SM fiches techniques PDF

Xicor - SPI Serial E2PROM With Block LockTM Protection

Numéro de référence X25080SM
Description SPI Serial E2PROM With Block LockTM Protection
Fabricant Xicor 
Logo Xicor 





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X25080SM fiche technique
APPLICATION NOTE
AVA I L A B L E
X25080
AN61
8K
X25080
1K x 8 Bit
SPI Serial E2PROM With Block LockTM Protection
FEATURES
• 2MHz Clock Rate
• SPI Modes (0,0 & 1,1)
• 1K X 8 Bits
— 32 Byte Page Mode
• Low Power CMOS
— <1µA Standby Current
— <5mA Active Current
• 2.7V To 5.5V Power Supply
• Block Lock Protection
— Protect 1/4, 1/2 or all of E2PROM Array
• Built-in Inadvertent Write Protection
— Power-Up/Power-Down protection circuitry
— Write Enable Latch
— Write Protect Pin
• Self-Timed Write Cycle
— 5ms Write Cycle Time (Typical)
• High Reliability
— Endurance: 100,000 cycles
— Data Retention: 100 Years
— ESD protection: 2000V on all pins
• 8-Lead PDlP Package
• 8-Lead SOIC Package
• 14-Lead TSSOP Package
DESCRIPTION
The X25080 is a CMOS 8192-bit serial E2PROM,
internally organized as 1K x 8. The X25080 features a
Serial Peripheral Interface (SPI) and software protocol
allowing operation 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 con-
trolled through a chip select (CS) input, allowing any
number of devices to share the same bus.
The X25080 also features two additional inputs that
provide the end user with added flexibility. By asserting
the HOLD input, the X25080 will ignore transitions on its
inputs, thus allowing the host to service higher priority
interrupts. The WP input can be used as a hardwire input
to the X25080 disabling all write attempts to the status
register, thus providing a mechanism for limiting end
user capability of altering 0, 1/4, 1/2 or all of the memory.
The X25080 utilizes Xicor’s proprietary Direct Write™
cell, providing a minimum endurance of 100,000 cycles
and a minimum data retention of 100 years.
FUNCTIONAL DIAGRAM
STATUS
REGISTER
WRITE
PROTECT
LOGIC
SO
SI
SCK
CS
HOLD
COMMAND
DECODE
AND
CONTROL
LOGIC
X DECODE
LOGIC
8
8
16
1K BYTE
ARRAY
8 X 256
8 X 256
16 X 256
WRITE
CONTROL
AND
WP TIMING
LOGIC
Direct Write™ and Block Lock™ Protection is a trademark of Xicor, Inc.
©Xicor, Inc. 1994, 1995, 1996 Patents Pending
3090-1.7 6/11/96 T3/C1/D0 NS
1
32 8
Y DECODE
DATA REGISTER
3090 ILL F01
Characteristics subject to change without notice

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