X24F064 Datasheet, PDF (1/18 Pages) Xicor Inc. – SerialFlash TM Memory with Block Lock TM Protection

APPLICATION NOTE
A V A I LABLE
AN76 • AN78 • AN81 • AN87
64K/32K/16K
X24F064/032/016
8K/4K/2K x 8 Bit
SerialFlash^TM Memory with Block Lock^TM Protection
FEATURES
• 1.8V to 3.6V or 5V “Univolt” Read and
Program Power Supply Versions
• Low Power CMOS
—Active Read Current Less Than 1mA
—Active Program Current Less Than 3mA
—Standby Current Less Than 1µA
• Internally Organized 8K/4K/2K x 8
• New Programmable Block Lock Protection
—Software Write Protection
—Programmable hardware Write Protect
• Block Lock (0, 1/4, 1/2, or all of the Flash
Memory array)
• 2 Wire Serial Interface
• Bidirectional Data Transfer Protocol
• 32 Byte Sector Programming
• Self Timed Program Cycle
—Typical Programming Time of 5ms
Per Sector
• High Reliability
—Endurance: 100,000 cycles per byte
—Data Retention: 100 Years
• Available Packages
—8-Lead PDIP
—8-Lead SOIC (JEDEC)
—14-Lead TSSOP (X24F032/016)
—20-Lead TSSOP (X24F064)
DESCRIPTION
The X24F064/032/016 is a CMOS SerialFlash
Memory Family, internally organized 8K/4K/2K x 8.
The family features a serial interface and software
protocol allowing operation on a simple two wire bus.
Device select inputs (S₀, S₁, S₂) allow up to eight
devices to share a common two wire bus.
A Program Protect Register accessed at the highest
address location, provides three new programming
protection features: Software Programming Protection,
Block Lock Protection, and Hardware Programming
Protection. The Software Programming Protection
feature prevents any nonvolatile writes to the device
until the WEL bit in the program protect register is set.
The Block Lock^TM Protection feature allows the user to
individually protect four blocks of the array by program-
ming two bits in the programming protect register. The
Programmable Hardware Program Protect feature
allows the user to install each device with PP tied to
V_CC, program the entire memory array in place, and
then enable the hardware programming protection by
programming a PPEN bit in the program protect
register. After this, selected blocks of the array,
including the program protect register itself, are
permanently protected from being programmed.
FUNCTIONAL DIAGRAM
SDA
SCL
DATA REGISTER
SECTOR DECODE LOGIC
32
8
S₀/S₀
S₁/S₁
S₂/S₂
COMMAND
DECODE
AND CONTROL
LOGIC
X
DECODE
LOGIC
PROGRAM
PROTECT
REGISTER
SECTORED
MEMORY
ARRAY
PP
PROGRAMMING
CONTROL LOGIC
SerialFlash^™ Memory and Block Lock^™
Protection are trademarks of Xicor, Inc.
©Xicor, 1995, 1996 Patents Pending
6686-3.8 8/29/96 T3/C0/D0 SH
1
HIGH VOLTAGE
CONTROL
6686 ILL F01.5
Characteristics subject to change without notice