NM34W02 2K-Bit Standard 2-Wire Bus Interface Serial EEPROM
with Full Array Write Protect
Connection Diagram
SO (M8) and TSSOP (MT8) Package
A0
A1
A2
VSS
1
2
3
4
8
VCC
WP
SCL
SDA
DS500078-2
NM34W02
7
6
5
Top View
See Package Number
M08A and MTC08
Pin Names
A0,A1,A2
V
SS
SDA
SCL
WP
V
CC
Device Address Inputs
Ground
Data I/O
Clock Input
Write Protect
Power Supply
Ordering Information
NM
34
W
02
LZ
E
XX
Package
Temp. Range
Voltage Operating Range
Letter
M8
MT8
None
E
Blank
L
LZ
02
W
Interface
34
NM
Description
8-Pin SO8
8-Pin TSSOP
0 to 70°C
-40 to +85°C
4.5V to 5.5V
2.7V to 4.5V
2.7V to 4.5V and
<1µA Standby Current
2K
Full Array Write Protect
IIC
Fairchild Non-Volatile
Memory
Density
2
NM34W02 Rev. C.2
www.fairchildsemi.com
NM34W02 2K-Bit Standard 2-Wire Bus Interface Serial EEPROM
with Full Array Write Protect
Product Specifications
Absolute Maximum Ratings
Ambient Storage Temperature
All Input or Output Voltages
with Respect to Ground
Lead Temperature
(Soldering, 10 seconds)
ESD Rating
–65°C to +150°C
6.5V to –0.3V
+300°C
2000V min.
Operating Conditions
Ambient Operating Temperature
NM34W02
NM34W02E
Positive Power Supply
NM34W02
NM34W02L
NM34W02LZ
0°C to +70°C
-40°C to +85°C
4.5V to 5.5V
2.7V to 4.5V
2.7V to 4.5V
Standard V
CC
(4.5V to 5.5V) DC Electrical Characteristics
Symbol
Parameter
Test Conditions
Min
I
CCA
I
SB
I
LI
I
LO
V
IL
V
IH
V
OL
Active Power Supply Current
Standby Current
Input Leakage Current
Output Leakage Current
Input Low Voltage
Input High Voltage
Output Low Voltage
I
OL
= 3 mA
f
SCL
= 100 kHz
V
IN
= GND or V
CC
V
IN
= GND to V
CC
V
OUT
= GND to V
CC
–0.3
V
CC
x 0.7
Limits
Typ
(Note 1)
0.2
10
0.1
0.1
Units
Max
1.0
50
1
1
V
CC
x 0.3
V
CC
+ 0.5
0.4
mA
µA
µA
µA
V
V
V
Low V
CC
(2.7V to 5.5V) DC Electrical Characteristics
Symbol
Parameter
Test Conditions
Min
I
CCA
I
SB
I
LI
I
LO
V
IL
V
IH
V
OL
Active Power Supply Current
Standby Current for L
Standby Current for LZ
Input Leakage Current
Output Leakage Current
Input Low Voltage
Input High Voltage
Output Low Voltage
I
OL
= 3 mA
f
SCL
= 100 kHz
V
IN
= GND or V
CC
V
IN
= GND or V
CC
V
IN
= GND to V
CC
V
OUT
= GND to V
CC
–0.3
V
CC
x 0.7
Limits
Typ
(Note 1)
0.2
1
0.1
0.1
0.1
Units
Max
1.0
10
1
1
1
V
CC
x 0.3
V
CC
+ 0.5
0.4
mA
µA
µA
µA
µA
V
V
V
Capacitance
T
A
= +25°C, f = 100/400 KHz, V
CC
= 5V
(Note 2)
Symbol
C
I/O
C
IN
Test
Input/Output Capacitance (SDA)
Input Capacitance (A0, A1, A2, SCL)
Conditions
V
I/O
= 0V
V
IN
= 0V
Max
8
6
Units
pF
pF
Note 1:
Typical values are T
A
= 25°C and nominal supply voltage (5V).
Note 2:
This parameter is periodically sampled and not 100% tested.
3
NM34W02 Rev. C.2
www.fairchildsemi.com
NM34W02 2K-Bit Standard 2-Wire Bus Interface Serial EEPROM
with Full Array Write Protect
AC Conditions of Test
Input Pulse Levels
Input Rise and Fall Times
Input & Output Timing Levels
Output Load
V
CC
x 0.1 to V
CC
x 0.9
10 ns
V
CC
x 0.5
1 TTL Gate and C
L
= 100 pF
Read and Write Cycle Limits (Standard and Low V
CC
Range 2.7V - 5.5V)
Symbol
f
SCL
T
I
Parameter
SCL Clock Frequency
Noise Suppression Time Constant at
SCL, SDA Inputs (Minimum V
IN
Pulse width)
SCL Low to SDA Data Out Valid
Time the Bus Must Be Free before
a New Transmission Can Start
Start Condition Hold Time
Clock Low Period
Clock High Period
Start Condition Setup Time
(for a Repeated Start Condition)
Data in Hold Time
Data in Setup Time
SDA and SCL Rise Time
SDA and SCL Fall Time
Stop Condition Setup Time
Data Out Hold Time
Write Cycle Time - NM34W02
- NM34W02L, NM34W02LZ
100 KHz
Min
Max
100
100
0.3
4.7
4.0
4.7
4.0
4.7
0
250
1
300
4.7
300
10
15
3.5
400 KHz
Min
Max
400
50
0.1
1.3
0.6
1.5
0.6
0.6
0
100
0.3
300
0.6
50
10
15
0.9
Units
KHz
ns
µs
µs
µs
µs
µs
µs
ns
ns
µs
ns
µs
ns
ms
t
AA
t
BUF
t
HD:STA
t
LOW
t
HIGH
t
SU:STA
t
HD:DAT
t
SU:DAT
t
R
t
F
t
SU:STO
t
DH
t
WR
(Note 3)
Note 3:
The write cycle time (t
WR
) is the time from a valid stop condition of a write sequence to the end of the internal erase/program cycle. During the write cycle, the
NM34W02 bus interface circuits are disabled, SDA is allowed to remain high per the bus-level pull-up resistor, and the device does not respond to its slave address.
4
NM34W02 Rev. C.2
www.fairchildsemi.com
NM34W02 2K-Bit Standard 2-Wire Bus Interface Serial EEPROM
with Full Array Write Protect
Bus Timing
tF
tHIGH
tLOW
SCL
tLOW
tR
SDA
SDA
OUT
Background Information (IIC Bus)
As mentioned, the IIC bus allows synchronous bidirectional com-
munication between Transmitter/Receiver using the SCL (clock)
and SDA (Data I/O) lines. All communication must be started with
a valid START condition, concluded with a STOP condition and
acknowledged by the Receiver with an ACKNOWLEDGE condi-
tion.
In addition, since the IIC bus is designed to support other devices
such as RAM, EPROMs, etc., a device type identifier string must
follow the START condition. For EEPROMs, this 4-bit string is
1010. Also refer the
Addressing the WP Register
section.
As shown below, although the EEPROMs on the IIC bus may be
configured in any manner required, the total memory addressed
can not exceed 16K (16,384 bits) on the Standard IIC. EEPROM
memory address programming is controlled by 2 methods:
• Hardware configuring the A0, A1, and A2 pins (Device
Address pins) with pull-up or pull-down to V
CC
or V
SS
.
All
unused pins must be grounded
(tied to V
SS
).
• Software addressing the required PAGE BLOCK within the
device memory array (as sent in the Slave Address string).
Addressing an EEPROM memory location involves sending a
command string with the following information:
[DEVICE TYPE]—[DEVICE ADDRESS]—[PAGE BLOCK
ADDRESS]—[BYTE ADDRESS]
,,
tSU:STA
tHD:STA
IN
tHD:DAT
tSU:DAT
tSU:STO
tBUF
tDH
tAA
DS500078-5
DEFINITIONS
BYTE
PAGE
8 bits of data
16 sequential addresses (one byte
each) that may be programmed
during a 'Page Write' programming
cycle
2,048 (2K) bits organized into 16
pages of addressable memory. (8
bits) x (16 bytes) x (16 pages) = 2,048
bits
Any IIC device CONTROLLING the
transfer of data (such as a micropro-
cessor)
Device being controlled (EEPROMs
are always considered Slaves)
Device currently SENDING data on
the bus (may be either a Master or
Slave).
Device currently receiving data on the
bus (Master or Slave)
PAGE BLOCK
MASTER
SLAVE
TRANSMITTER
RECEIVER
Example of 16K of Memory on 2-Wire Bus
VCC
VCC
SDA
SCL
VCC
VCC
VCC
VCC
NM34C02L
A0 A1 A2 VSS
NM24C02
A0 A1 A2 VSS
NM24C04
A0 A1 A2 VSS
NM24C08
A0 A1 A2 VSS
To VCC or VSS
To VCC or VSS
To VCC or VSS
To VCC or VSS
DS500078-6
Note:
The SDA pull-up resistor is required due to the open-drain/open collector output of IIC bus devices.
The SCL pull-up resistor is recommended because of the normal SCL line inactive 'high' state.
It is recommended that the total line capacitance be less than 400pF.
Specific timing and addressing considerations are described in greater detail in the following sections.
I used the T0 timer to write the water lamp back and forth, but only one lamp is on and the water does not flow. I don’t know what the problem is. Can you help me analyze it and see where I went wrong...
The development of an industry not only depends on the power gathering within the industry, but more often it needs a suitable social and economic environment to give it opportunities. Our barcode ind...
I read the "Using Assignment Editor" section in the Chinese tutorial of QUARTUSII , but I still don't understand it. What does the operation mean? The key is that there are no examples of how to opera...
MATLAB provides several examples, such as:
F281x based board: c281x_adcpwmasynctestc281x_adcpwmasynctest
F280x/F2823x/F2833x based board: c280x_2833x_adcpwmasynctest
Piccolo F2802x/F2803x/F2806x based...
Some thoughts on learning 430
When I was in my sophomore year, I learned about the 51 microcontroller and got started with the world of microcontrollers. Later, I learned about the MSP430 microcontrol...
[font=微软雅黑][size=3]Google announced at the I/O Developer Conference that in the next few months, the Android operating system will fully support Bluetooth Smart Ready and Bluetooth Smart (both based o...
1. Several nouns
ABI:
The specifications that an executable file must follow in order to run in a specific execution environment;
Separately generated relocatabl...[Details]
What is "Car Electronic Fence"
Fleet managers can define a graphical area (regular or irregular) or divide it into administrative zones in Yamei Technology's vehicle backend management system ...[Details]
Whether it is an electric car or an ordinary fuel car, for the vast majority of car buyers, the final cost of use is what they care about most. For fuel cars, how to save fuel is what drivers care ...[Details]
Limited vocabulary recognition
According to the number of characters, words or short sentences in the vocabulary, it can be roughly divided into: less than 100 is small vocabulary; 100-1000 is...[Details]
Introduction to the principles of speech recognition technology
Automatic speech recognition (ASR) technology aims to enable computers to understand human speech and extract the textual inform...[Details]
Logic analyzers are widely used tools in digital design verification and debugging. They can verify the proper functioning of digital circuits and help users identify and troubleshoot faults. They ...[Details]
Robotics
has become
LiDAR
's "second growth curve."
While LiDAR was still battling with its "pure vision" rivals in the automotive field, another field ignited the demand f...[Details]
Recently, Tesla released the "Tesla Car Voice Assistant Terms of Use", announcing that the car voice assistant will be connected to the Doubao large model (Skylark large model) and DeepSeek Chat pr...[Details]
The all-new MG4 was recently officially announced on the Ministry of Industry and Information Technology's (MIIT) new vehicle announcement. The all-new MG4's semi-solid-state battery version addres...[Details]
Spark plugs are an indispensable device for engines. As the saying goes, without spark plugs, the engine cannot work properly. The serious consequence is that when driving at high speeds, the engin...[Details]
With the continuous development of the industrial automation industry, we are seeing an increasing number of intelligent devices using flexible, efficient, and precise robotic arms to p...[Details]
On August 21st, BYD announced the launch of its next-generation "Little White Pile" product, the "Lingchong"
charging
pile
, which is now available for general sale. This charging pile feat...[Details]
To improve the lateral active safety of intelligent connected vehicles, the identification and definition of unexpected functional safety scenarios for the EPS (Electronic Steering System) ...[Details]
Before understanding single-phase control transformers, let's briefly understand what a single-phase transformer is. A single-phase transformer uses a single-phase input. Compared to a three-phase ...[Details]
We often hear about the precautions for using pure electric vehicles in winter, and many owners even develop relevant strategies, such as adopting a "charge as you go" principle for their vehicles,...[Details]
51mcu
京公网安备 11010802033920号
EEWORLD
