August 1999
NM24C65U
64K-Bit Serial EEPROM with Write Protect
2-Wire Bus Interface
General Description:
continuously reliable non-volatile solution for all markets.
The NM24C65U is a 64K (65,536) bit serial interface CMOS
EEPROM (Electrically Erasable Programmable Read-Only
Memory). This device fully conforms to the Extended I2C™ 2-wire
protocol which uses Clock (SCL) and Data I/O (SDA) pins to
synchronously clock data between the "master" (for example a
microprocessor) and the "slave" (the EEPROM device). In addition, the serial interface allows a minimal pin count packaging
designed to simplify PC board layout requirements and offers the
designer a variety of low voltage and low power options.
Functions
NM24C65U incorporates a hardware "Write Protect" feature, by
which the upper half of the memory can be disabled against
programming by connecting the WP pin to VCC. This section of
memory then effectively becomes a ROM (Read-Only Memory)
and can no longer be programmed as long as WP pin is connected
to VCC.
■ Memory "Upper Block" Write Protect pin
■ I2C™ compatible interface
■ 65,536 bits organized as 8,192 x 8
■ 100 KHz or 400 KHz operation
■ Extended 2.7V – 5.5V operating voltage
■ Self timed programming cycle (6ms typical)
■ "Programming complete" indicated by ACK polling
Features
■ The I2C™ interface allows the smallest I/O pincount of any
EEPROM interface
■ 32 byte page write mode to minimize total write time per byte
■ Low VCC programming lockout (3.8V)
— "H" option (Standard VCC range) parts only
Fairchild EEPROMs are designed and tested for applications requiring high endurance, high reliability and low power consumption for a
■ Typical 200µA active current (ICCA)
■ Typical 1µA standby current (ISB) for "L" devices and 0.1µA
standby current for "LZ" devices
■ Endurance: Up to 1,000,000 data changes
■ Data retention greater than 40 years
Block Diagram
WRITE
LOCKOUT
VCC
WP
START CYCLE
H.V. GENERATION
TIMING &CONTROL
START
STOP
LOGIC
SDA
CONTROL
LOGIC
SLAVE ADDRESS
REGISTER &
COMPARATOR
SCL
XDEC
LOAD
A2
A1
A0
E2PROM
ARRAY
INC
WORD
ADDRESS
COUNTER
R/W
YDEC
CK
DATA REGISTER
DIN
DS800012-1
I2C™ is a registered trademark of Philips Electronics N.V.
© 1999 Fairchild Semiconductor Corporation
NM24C65U Rev. B.1
DOUT
1
www.fairchildsemi.com
NM24C65U 64K-Bit Serial EEPROM with Write Protect 2-Wire Bus Interface
PRELIMINARY
Dual-In-Line Package (N)
and 8-Pin SO Package (M8)
A0
1
A1
2
8
VCC
7
WP
NM24C65U
A2
3
6
SCL
VSS
4
5
SDA
DS800012-2
Top View
See Package Number N08E and M08A
Pin Names
A0, A1, A2
Device Address Input
VSS
Ground
SDA
Data I/O
SCL
Clock Input
WP
Write Protect
VCC
Power Supply
Ordering Information
NM
24
C
XX
U
F
LZ
E
XX
Letter
Description
N
M8
8-Pin DIP
8-Pin SOIC
Temp. Range
None
V
E
0 to 70°C
-40 to +125°C
-40 to +85°C
Voltage Operating Range
Blank
L
LZ
H
4.5V to 5.5V
2.7V to 5.5V
2.7V to 5.5V and
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The NM24C65U is a 64K (65,536) bit serial
applications
interface CMOS EEPROM (Electrically
New products
Erasable Programmable Read-Only Memory).
Product selection and
This device fully conforms to the Extended
parametric search
I2C™ 2-wire protocol which uses Clock (SCL)
and Data I/O (SDA) pins to synchronously
Cross-reference
clock data between the "master" (for example a
search
microprocessor) and the "slave" (the EEPROM
device). In addition, the serial interface allows
technical information
a minimal pin count, packaging designed to
simplify PC board layout requirements and
buy products
offers the designer a variety of low voltage and
technical support
low power options.
my Fairchild
company
Product Folders and
Datasheets
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notes
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Design tools
Because this device incorporates a hardware
"Write Protect" feature, the upper half of the
memory can be disabled against programming
by connecting the WP pin to VCC. This section
of memory then effectively becomes a ROM
(Read-Only Memory) and can no longer be
programmed.
Fairchild EEPROMs are designed and tested
for applications requiring high endurance, high space
reliability and low power consumption for a
continuously reliable non-volatile solution for
all markets.
back to top
Features
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Product Folder - Fairchild P/N NM24C65U - Product information
●
●
●
●
●
●
●
The I2C™ interface allows the smallest
I/O pincount of any EEPROM interface
32 byte page write mode to minimize
total write time per byte
Low VCC programming lockout (3.8V)
❍ "H" option (Standard V
CC
range) parts only
Typical 200µA active current (ICCA)
Typical 1µA standby current (ISB) for
"L" devices and 0.1µA standby current
for "LZ" devices
Endurance: Up to 1,000,000 data
changes
Data retention greater than 40 years
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Product status/pricing/packaging
Product
Product status
Pricing*
Package
Leads
type
Package
marking
Packing
method
NM24C65UFM8X
Not
recommended for
new designs
N/A
SOIC
8
$Y&Z&2&T
24U65
F
TAPE
REEL
NM24C65UN
Not
recommended for
new designs
$1.26
DIP
8
$Y&Z&2&T
24U65
N
RAIL
NM24C65ULZN
Not
recommended for
new designs
N/A
DIP
8
$Y&Z&2&T
24U65
LZ
RAIL
NM24C65ULM8
Not
recommended for
new designs
$1.29
SOIC
8
$Y&Z&2&T
24U65
L
RAIL
NM24C65UFLM8X
Not
recommended for
new designs
N/A
SOIC
8
$Y&Z&2&T
24U65
FLM8
TAPE
REEL
NM24C65UEM8
Not
recommended for
new designs
$1.29
SOIC
8
$Y&Z&2&T
24U65
EM8
RAIL
Not
NM24C65UFLZEM8X recommended for
new designs
$1.33
SOIC
8
$Y&Z&2&T
24U65
FLZE
TAPE
REEL
NM24C65ULEN
Not
recommended for
new designs
N/A
DIP
8
$Y&Z&2&T
24U65
LE
RAIL
NM24C65UEN
Not
recommended for
new designs
$1.29
DIP
8
$Y&Z&2&T
24U65
EN
RAIL
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Product Folder - Fairchild P/N NM24C65U - Product information
NM24C65UM8X
Not
recommended for
new designs
$1.26
SOIC
8
$Y&Z&2&T
24U65
M8
TAPE
REEL
NM24C65UFLEM8
Not
recommended for
new designs
N/A
SOIC
8
$Y&Z&2&T
24U65
FLE
RAIL
NM24C65UVM8X
Not
recommended for
new designs
N/A
SOIC
8
$Y&Z&2&T
24U65
V
TAPE
REEL
NM24C65UM8
Not
recommended for
new designs
$1.26
SOIC
8
$Y&Z&2&T
24U65
M8
RAIL
NM24C65UFLZEM8
Not
recommended for
new designs
$1.33
SOIC
8
$Y&Z&2&T
24U65
FLZE
RAIL
NM24C65UFLZM8X
Not
recommended for
new designs
8
$Y&Z&2&T
24U65
FLZ
TAPE
REEL
NM24C65ULM8X
Not
recommended for
new designs
8
$Y&Z&2&T
24U65
L
TAPE
REEL
NM24C65ULZEM8
Not
recommended for
new designs
8
$Y&Z&2&T
24U65
LZE
RAIL
NM24C65UFLZM8
Not
recommended for
new designs
8
$Y&Z&2&T
24U65
FLZ
RAIL
NM24C65UFLEM8X
Not
recommended for
new designs
N/A
SOIC
8
$Y&Z&2&T
24U65
FLE
TAPE
REEL
NM24C65UEM8X
Not
recommended for
new designs
$1.29
SOIC
8
$Y&Z&2&T
24U65
E
TAPE
REEL
NM24C65ULEM8
Not
recommended for
new designs
$1.31
SOIC
8
$Y&Z&2&T
24U65
LE
RAIL
NM24C65ULN
Not
recommended for
new designs
$1.29
DIP
8
$Y&Z&2&T
24U65
L
RAIL
NM24C65UVM8
Not
recommended for
new designs
N/A
SOIC
8
$Y&Z&2&T
24U65
V
RAIL
NM24C65UDWF
Not
recommended for
new designs
N/A
Wafer
N/A
N/A
RAIL
NM24C65UFLM8
Not
recommended for
new designs
N/A
SOIC
8
$Y&Z&2&T
24U65
FL
RAIL
N/A
$1.29
$1.33
N/A
SOIC
SOIC
SOIC
SOIC
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Product Folder - Fairchild P/N NM24C65U - Product information
NM24C65UFM8
Not
recommended for
new designs
N/A
SOIC
8
$Y&Z&2&T
24U65
F
RAIL
NM24C65ULZM8
Not
recommended for
new designs
N/A
SOIC
8
$Y&Z&2&T
24U65
LZ
RAIL
NM24C65ULZM8X
Not
recommended for
new designs
N/A
SOIC
8
$Y&Z&2&T
24U65
LZ
TAPE
REEL
NM24C65ULEM8X
Not
recommended for
new designs
N/A
SOIC
8
$Y&Z&2&T
24U65
LE
TAPE
REEL
NM24C65ULZEM8X
Not
recommended for
new designs
$1.33
SOIC
8
$Y&Z&2&T
24U65
LZE
TAPE
REEL
* 1,000 piece Budgetary Pricing
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