24LC164 DATA SHEET (07/22/2004) DOWNLOAD

Obsolete Device
24LC164
16K 2.5V Cascadable I2C™ Serial EEPROM
FEATURES
PDIP
VCC
7
WP
6
SCL
4
5
SDA
A0
1
8
VCC
A1
2
7
WP
A2
3
6
SCL
VSS
4
5
SDA
1
A1
2
A2
3
VSS
SOIC
24LC164
BLOCK DIAGRAM
WP
A2 A1 A0
HV GENERATOR
I/O
CONTROL
LOGIC
DESCRIPTION
The Microchip Technology Inc. 24LC164 is a cascadable 16 Kbit Electrically Erasable PROM (EEPROM).
The device is organized as eight blocks of 256 x 8-bit
memory with a 2-wire serial interface. Low voltage
design permits operation down to 2.5 volts with standby
and active currents of only 5 µA and 1 mA respectively.
The 24LC164 also has a page-write capability for up to
16 bytes of data. The 24LC164 is available in the standard 8-pin DIP and 8-lead surface mount SOIC packages.
8
A0
24LC164
• Single supply with operation down to 2.5V
• Low power CMOS technology
- 1 mA active current typical
- 10 µA standby current typical at 5.5V
- 5 µA standby current typical at 3.0V
• Organized as eight blocks of 256 bytes
(8 x 256 x 8)
• 2-wire serial interface bus, I2C™ compatible
• Functional address inputs for cascading up to
8 devices
• Schmitt trigger, filtered inputs for noise
suppression
• Output slope control to eliminate ground bounce
• 100 kHz (2.5V) and 400 kHz (5V) compatibility
• Self-timed write cycle (including auto-erase)
• Page-write buffer for up to 16 bytes
• 2 ms typical write cycle time for page-write
• Hardware write protect for entire memory
• Can be operated as a serial ROM
• Factory programming (QTP) available
• ESD protection > 4,000V
• 1,000,000 Erase/Write cycles guaranteed
• Data retention > 200 years
• 8-pin DIP, 8-lead SOIC packages
• Available temperature ranges:
- Commercial (C):
0°C to +70°C
- Industrial (I):
-40°C to +85°C
PACKAGE TYPES
MEMORY
CONTROL
LOGIC
XDEC
EEPROM ARRAY
(8 x 256 x 8)
PAGE LATCHES
SDA
SCL
YDEC
VCC
VSS
SENSE AMP
R/W CONTROL
The three select pins, A0, A1 and A2, function as chip
select inputs and allow up to eight devices to share a
common bus, for up to 128 Kbits total system
EEPROM.
I2C is a trademark of Philips Corporation.
 2004 Microchip Technology Inc.
DS21093I-page 1
24LC164
1.0
ELECTRICAL
CHARACTERISTICS
1.1
TABLE 1-1:
PIN FUNCTION TABLE
Name
Maximum Ratings*
VCC...................................................................................7.0V
All inputs and outputs w.r.t. VSS ............... -0.3V to VCC +1.0V
Storage temperature .....................................-65°C to +150°C
Ambient temp. with power applied ................-65°C to +125°C
Soldering temperature of leads (10 seconds) ............. +300°C
ESD protection on all pins ..................................................≥ 4 kV
Function
VSS
Ground
SDA
Serial Address/Data I/O
SCL
Serial Clock
WP
Write Protect Input
VCC
+2.5V to 5.5V Power Supply
A0, A1, A2
Chip Address Inputs
*Notice: Stresses above those listed under “Maximum ratings”
may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any
other conditions above those indicated in the operational listings
of this specification is not implied. Exposure to maximum rating
conditions for extended periods may affect device reliability.
TABLE 1-2:
DC CHARACTERISTICS
VCC = +2.5V to +5.5V
Commercial (C):
Industrial (I):
Parameter
Symbol
Min.
High level input voltage
VIH
Low level input voltage
VIL
TAMB = 0°C to +70°C
TAMB = -40°C to +85°C
Max.
Units
Conditions
.7 VCC
—
V
—
—
.3 VCC
V
—
VHYS
.05 VCC
—
V
(Note)
VOL
—
.40
V
IOL = 3.0 mA, VCC = 2.5V
Input leakage current
ILI
-10
10
µA
VIN = 0.1V to VCC
Output leakage current
ILO
-10
10
µΑ
VOUT = 0.1V to VCC
Pin capacitance
(all inputs/outputs)
CIN, COUT
—
10
pF
VCC = 5.0V (Note)
TAMB = 25°C, FCLK = 1MHz
Operating current
ICC Write
ICC Read
—
—
3
1
mA
mA
VCC = 5.5V, SCL = 400 kHz
ICCS
—
—
30
100
µΑ
µΑ
VCC = 3.0V, SDA = SCL = VCC
VCC = 5.5V, SDA = SCL = VCC
A0 = A1 = A2 = WP = VSS
WP, SCL and SDA pins:
Hysteresis of Schmitt trigger
inputs
Low level output voltage
Standby current
Note:
This parameter is periodically sampled and not 100% tested.
FIGURE 1-1:
BUS TIMING START/STOP
VHYS
SCL
THD:STA
TSU:STA
TSU:STO
SDA
START
DS21093I-page 2
STOP
 2004 Microchip Technology Inc.
24LC164
TABLE 1-3:
AC CHARACTERISTICS
STANDARD
MODE
Parameter
VCC = 4.5V - 5.5V
FAST MODE
Symbol
Min.
Max.
Min.
Max.
Units
Clock frequency
FCLK
—
100
—
400
kHz
—
Clock high time
THIGH
4000
—
600
—
ns
—
Clock low time
TLOW
4700
—
1300
—
ns
—
SDA and SCL rise time
TR
—
1000
—
300
ns
(Note 1)
SDA and SCL fall time
TF
—
300
—
300
ns
(Note 1)
THD:STA
4000
—
600
—
ns
After this period the first
clock pulse is generated
START condition setup time TSU:STA
4700
—
600
—
ns
Only relevant for repeated
START condition
0
—
0
—
ns
—
START condition hold time
Data input hold time
THD:DAT
Remarks
Data input setup time
TSU:DAT
250
—
100
—
ns
—
STOP condition setup time
TSU:STO
4000
—
600
—
ns
—
TAA
—
3500
—
900
ns
(Note 2)
Bus free time
Output valid from clock
TBUF
4700
—
1300
—
ns
Time the bus must be free
before a new transmission
can start
Output fall time from VIH min
to VIL max
TOF
—
250
20 + 0.1
Cb
250
ns
(Note 1), CB ≤ 100 pF
Input filter spike suppression (SDA and SCL pins)
TSP
—
50
—
50
ns
(Note 3)
Write cycle time
TWR
—
10
—
10
ms
Byte or Page mode
—
1M
—
1M
—
Endurance
cycles 25°C, VCC = 5.0V, Block
Mode (Note 4)
Note 1: Not 100% tested. CB = total capacitance of one bus line in pF.
2: As a transmitter, the device must provide an internal minimum delay time to bridge the undefined region
(minimum 300 ns) of the falling edge of SCL to avoid unintended generation of START or STOP conditions.
3: The combined TSP and VHYS specifications are due to new Schmitt trigger inputs which provide improved
noise and spike suppression. This eliminates the need for a TI specification for standard operation.
4: This parameter is not tested but ensured by characterization. For endurance estimates in a specific
application, please consult the Total Endurance Model which can be obtained on Microchip’s website at
www.microchip.com.
FIGURE 1-2:
BUS TIMING DATA
TF
TR
THIGH
TLOW
SCL
TSU:STA
THD:DAT
TSU:DAT
TSU:STO
THD:STA
SDA
IN
TSP
TBUF
TAA
TAA
SDA
OUT
 2004 Microchip Technology Inc.
DS21093I-page 3
24LC164
2.0
FUNCTIONAL DESCRIPTION
The 24LC164 supports a Bi-directional 2-wire bus and
data transmission protocol. A device that sends data
onto the bus is defined as transmitter and if receiving
data, as receiver. The bus has to be controlled by a
master device which generates the serial clock (SCL),
controls the bus access and generates the START and
STOP conditions, while the 24LC164 works as slave.
Both master and slave can operate as transmitter or
receiver, but the master device determines which mode
is activated.
3.0
BUS CHARACTERISTICS
The following bus protocol has been defined:
• Data transfer may be initiated only when the bus
is not busy
• During data transfer, the data line must remain
stable whenever the clock line is HIGH. Changes
in the data line while the clock line is HIGH will be
interpreted as a START or STOP condition
Accordingly, the following bus conditions have been
defined (Figure 3-1).
3.1
Start Data Transfer (B)
A HIGH to LOW transition of the SDA line while the
clock (SCL) is HIGH determines a START condition.
All commands must be preceded by a START condition.
3.3
Stop Data Transfer (C)
A LOW to HIGH transition of the SDA line while the
clock (SCL) is HIGH determines a STOP condition. All
operations must be ended with a STOP condition.
FIGURE 3-1:
Data Valid (D)
The state of the data line represents valid data when,
after a START condition, the data line is stable for the
duration of the HIGH period of the clock signal.
The data on the line must be changed during the LOW
period of the clock signal. There is one clock pulse per
bit of data.
Each data transfer is initiated with a START condition
and terminated with a STOP condition. The number of
the data bytes transferred between the START and
STOP conditions is determined by the master device
and is theoretically unlimited, although only the last 16
will be stored when doing a write operation. When an
overwrite does occur it will replace data in a first in first
out fashion.
3.5
Acknowledge
Each receiving device, when addressed, is obliged to
generate an acknowledge after the reception of each
byte. The master device must generate an extra clock
pulse which is associated with this acknowledge bit..
Note:
Bus not Busy (A)
Both data and clock lines remain HIGH.
3.2
3.4
The 24LC164 does not generate any
acknowledge bits if an internal programming cycle is in progress.
The device that acknowledges, has to pull down the
SDA line during the acknowledge clock pulse in such a
way that the SDA line is stable LOW during the HIGH
period of the acknowledge related clock pulse. Of
course, setup and hold times must be taken into
account. During reads, a master must signal an end of
data to the slave by not generating an acknowledge bit
on the last byte that has been clocked out of the slave.
In this case, the slave (24LC164) will leave the data line
HIGH to enable the master to generate the STOP condition.
DATA TRANSFER SEQUENCE ON THE SERIAL BUS
(A)
(B)
(D)
START
CONDITION
ADDRESS OR
ACKNOWLEDGE
VALID
(D)
(C)
(A)
SCL
SDA
DS21093I-page 4
DATA
ALLOWED
TO CHANGE
STOP
CONDITION
 2004 Microchip Technology Inc.
24LC164
3.6
Device Addressing
A control byte is the first byte received following the
start condition from the master device. The first bit is
always a one. The next three bits of the control byte
are the device select bits (A2, A1, A0). They are used
to select which of the eight devices are to be accessed.
The A1 bit must be the inverse of the A1 device select
pin.
The next three bits of the control byte are the block
select bits (B2, B1, B0). They are used by the master
device to select which of the eight 256 word blocks of
memory are to be accessed. These bits are in effect
the three most significant bits of the word address.
The last bit of the control byte defines the operation to
be performed. When set to one, a read operation is
selected. When set to ‘0’ a write operation is selected.
Following the start condition, the 24LC164 looks for the
slave address for the device selected. Depending on
the state of the R/W bit, the 24LC164 will select a read
or write operation.
Operation
Control Code
Block Select
R/W
Read
1
A2 A1 A0 Block Address
1
Write
1
A2 A1 A0 Block Address
0
FIGURE 3-2:
CONTROL BYTE
ALLOCATION
START
READ/WRITE
SLAVE ADDRESS
1
A2
A1
A0
B2
MSB
 2004 Microchip Technology Inc.
R/W
B1
B0
LSB
A
4.0
WRITE OPERATION
4.1
Byte Write
Following the start condition from the master, the
device code (4 bits), the block address (3 bits) and the
R/W bit, which is a logic LOW, is placed onto the bus by
the master transmitter. This indicates to the addressed
slave receiver that a byte with a word address will follow after it has generated an acknowledge bit during
the ninth clock cycle. Therefore, the next byte transmitted by the master is the word address and will be written into the address pointer of the 24LC164. After
receiving another acknowledge signal from the
24LC164, the master device will transmit the data word
to be written into the addressed memory location. The
24LC164 acknowledges again and the master generates a stop condition. This initiates the internal write
cycle. During this time the 24LC164 will not generate
acknowledge signals (Figure 4-1).
4.2
Page Write
The write control byte, word address and the first data
byte are transmitted to the 24LC164 in the same way
as in a byte write. But instead of generating a stop condition, the master transmits up to 16 data bytes to the
24LC164 which are temporarily stored in the on-chip
page buffer and will be written into the memory after the
master has transmitted a stop condition. After the
receipt of each word, the four lower order address
pointer bits are internally incremented by one. The
higher order seven bits of the word address remains
constant. If the master should transmit more than 16
words prior to generating the stop condition, the
address counter will roll over and the previously
received data will be overwritten. As with the byte write
operation, once the stop condition is received an internal write cycle will begin (Figure 4-2).
Note:
Page write operations are limited to
writing bytes within a single physical
page, regardless of the number of
bytes actually being written. Physical
page boundaries start at addresses
that are integer multiples of the page
buffer size (or ‘page size’) and end at
addresses that are integer multiples of
[page size - 1]. If a page write command attempts to write across a physical page boundary, the result is that the
data wraps around to the beginning of
the current page (overwriting data previously stored there), instead of being
written to the next page as might be
expected. It is therefore necessary for
the application software to prevent
page write operations that would
attempt to cross a page boundary.
DS21093I-page 5
24LC164
FIGURE 4-1:
BUS ACTIVITY
MASTER
SDA LINE
BYTE WRITE
S
T
A
R
T
CONTROL
BYTE
S 1
A A
2 1
SDA LINE
BUS ACTIVITY
DS21093I-page 6
P
A
C
K
FIGURE 4-2:
S
T
O
P
DATA
A B B B
0 2 1 0
BUS ACTIVITY
BUS ACTIVITY
MASTER
WORD
ADDRESS
A
C
K
A
C
K
PAGE WRITE
S
T
A
R
T
CONTROL
BYTE
S
A A A B B B
2 1 0 2 1 0
WORD
ADDRESS (n)
DATA (n + 1)
DATA (n)
S
T
O
P
DATA (n + 15)
P
A
C
K
A
C
K
A
C
K
A
C
K
A
C
K
 2004 Microchip Technology Inc.
24LC164
5.0
ACKNOWLEDGE POLLING
Since the device will not acknowledge during a write
cycle, this can be used to determine when the cycle is
complete (this feature can be used to maximize bus
throughput). Once the stop condition for a write command has been issued from the master, the device initiates the internally timed write cycle. ACK polling can
be initiated immediately. This involves the master sending a start condition followed by the control byte for a
write command (R/W = 0). If the device is still busy with
the write cycle, then no ACK will be returned. If the
cycle is complete, then the device will return the ACK
and the master can then proceed with the next read or
write command. See Figure 5-1 for flow diagram.
FIGURE 5-1:
ACKNOWLEDGE
POLLING FLOW
Send
Write Command
7.0
Read operations are initiated in the same way as write
operations with the exception that the R/W bit of the
slave address is set to ‘1’. There are three basic types
of read operations: current address read, random read
and sequential read.
7.1
Random Read
Random read operations allow the master to access
any memory location in a random manner. To perform
this type of read operation, first the word address must
be set. This is done by sending the word address to the
24LC164 as part of a write operation. After the word
address is sent, the master generates a start condition
following the acknowledge. This terminates the write
operation, but not before the internal address pointer is
set. Then the master issues the control byte again but
with the R/W bit set to a ‘1’. The 24LC164 will then
issue an acknowledge and transmits the 8-bit data
word. The master will not acknowledge the transfer but
does generate a stop condition and the 24LC164 discontinues transmission (Figure 7-2).
Send Stop
Condition to
Initiate Write Cycle
Send Start
Send Control Byte
with R/W = 0
No
Yes
Next
Operation
6.0
Current Address Read
The 24LC164 contains an address counter that maintains the address of the last word accessed, internally
incremented by one. Therefore, if the previous access
(either a read or write operation) was to address n, the
next current address read operation would access data
from address n + 1. Upon receipt of the slave address
with R/W bit set to ‘1’, the 24LC164 issues an acknowledge and transmits the 8-bit data word. The master will
not acknowledge the transfer but does generate a stop
condition and the 24LC164 discontinues transmission
(Figure 7-1).
7.2
Did Device
Acknowledge
(ACK = 0)?
READ OPERATION
WRITE PROTECTION
The 24LC164 can be used as a serial ROM when the
WP pin is connected to VCC. Programming will be
inhibited and the entire memory will be write-protected.
7.3
Sequential Read
Sequential reads are initiated in the same way as a random read except that after the 24LC164 transmits the
first data byte, the master issues an acknowledge as
opposed to a stop condition in a random read. This
directs the 24LC164 to transmit the next sequentially
addressed 8-bit word (Figure 7-3).
To provide sequential reads the 24LC164 contains an
internal address pointer which is incremented by one at
the completion of each operation. This address pointer
allows an entire device memory contents to be serially
read during one operation.
7.4
Noise Protection
The 24LC164 employs a VCC threshold detector circuit
which disables the internal erase/write logic if the VCC
is below 1.5 volts at nominal conditions.
The SCL and SDA inputs have Schmitt trigger and filter
circuits which suppress noise spikes to assure proper
device operation even on a noisy bus.
 2004 Microchip Technology Inc.
DS21093I-page 7
24LC164
FIGURE 7-1:
CURRENT ADDRESS READ
BUS ACTIVITY
MASTER
S
T
A
R
T
SDA LINE
S 1 A2A1A0B2B1B0
CONTROL
BYTE
DATA (n)
P
S
T
A
R
T
CONTROL
BYTE
S
T
A
R
T
WORD
ADDRESS (n)
S 1 A2 A1A0B2B1B0
S
T
O
P
DATA (n)
P
A
C
K
A
C
K
BUS ACTIVITY
CONTROL
BYTE
S
SDA LINE
BUS ACTIVITY
MASTER
A
C
K
RANDOM READ
BUS ACTIVITY
MASTER
FIGURE 7-3:
N
O
A
C
K
BUS ACTIVITY
FIGURE 7-2:
S
T
O
P
A
C
K
N
O
A
C
K
SEQUENTIAL READ
CONTROL
BYTE
DATA (n)
DATA (n + 1)
DATA (n + 2)
S
T
O
P
DATA (n + X)
SDA LINE
BUS ACTIVITY
P
A
C
K
A
C
K
A
C
K
A
C
K
N
O
A
C
K
8.0
PIN DESCRIPTIONS
8.3
8.1
SDA Serial Address/Data Input/
Output
This pin must be connected to either VSS or VCC.
WP
If tied to VSS, normal memory operation is enabled
(read/write the entire memory 000-7FF).
This is a bi-directional pin used to transfer addresses
and data into and data out of the device. It is an open
drain terminal. Therefore, the SDA bus requires a pullup resistor to VCC (typical 10kΩ for 100 kHz, 2kΩ for
400 kHz).
If tied to VCC, WRITE operations are inhibited. The
entire memory will be write-protected. Read operations
are not affected.
For normal data transfer SDA is allowed to change only
during SCL LOW. Changes during SCL HIGH are
reserved for indicating the START and STOP conditions.
8.4
8.2
SCL Serial Clock
This input is used to synchronize the data transfer from
and to the device.
This feature allows the user to use the 24LC164 as a
serial ROM when WP is enabled (tied to VCC).
A0, A1, A2
These pins are used to configure the proper chip
address in multiple-chip applications (more than one
24LC164 on the same bus). The levels on these pins
are compared to the corresponding bits in the slave
address. The chip is selected if the compare is true.
Note:
The level on A1 is compared to the
inverse of the slave address.
Up to eight 24LC164s may be connected to the same
bus. These pins must be connected to either VSS or
VCC.
DS21093I-page 8
 2004 Microchip Technology Inc.
24LC164
9.0
PACKAGING INFORMATION
9.1
Package Marking Information
8-Lead PDIP (300 mil)
Example
XXXXXXXX
XXXXXNNN
YYWW
24LC164
XXXXXNNN
0025
8-Lead SOIC (150 mil)
XXXXXXXX
XXXXYYWW
NNN
Legend: XX...X
YY
WW
NNN
Note:
*
Example
24LC164
XXXX0025
NNN
Customer specific information*
Year code (last 2 digits of calendar year)
Week code (week of January 1 is week ‘01’)
Alphanumeric traceability code
In the event the full Microchip part number cannot be marked on one line, it will
be carried over to the next line thus limiting the number of available characters
for customer specific information.
Standard PICmicro device marking consists of Microchip part number, year code, week code and
traceability code. For PICmicro device marking beyond this, certain price adders apply. Please check
with your Microchip Sales Office. For QTP devices, any special marking adders are included in QTP
price.
 2004 Microchip Technology Inc.
DS21093I-page 9
24LC164
8-Lead Plastic Dual In-line (P) – 300 mil (PDIP)
E1
D
2
n
1
α
E
A2
A
L
c
A1
β
B1
p
eB
B
Units
Dimension Limits
n
p
Number of Pins
Pitch
Top to Seating Plane
Molded Package Thickness
Base to Seating Plane
Shoulder to Shoulder Width
Molded Package Width
Overall Length
Tip to Seating Plane
Lead Thickness
Upper Lead Width
Lower Lead Width
Overall Row Spacing
Mold Draft Angle Top
Mold Draft Angle Bottom
* Controlling Parameter
§ Significant Characteristic
A
A2
A1
E
E1
D
L
c
§
B1
B
eB
α
β
MIN
.140
.115
.015
.300
.240
.360
.125
.008
.045
.014
.310
5
5
INCHES*
NOM
MAX
8
.100
.155
.130
.170
.145
.313
.250
.373
.130
.012
.058
.018
.370
10
10
.325
.260
.385
.135
.015
.070
.022
.430
15
15
MILLIMETERS
NOM
8
2.54
3.56
3.94
2.92
3.30
0.38
7.62
7.94
6.10
6.35
9.14
9.46
3.18
3.30
0.20
0.29
1.14
1.46
0.36
0.46
7.87
9.40
5
10
5
10
MIN
MAX
4.32
3.68
8.26
6.60
9.78
3.43
0.38
1.78
0.56
10.92
15
15
Notes:
Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed
.010” (0.254mm) per side.
JEDEC Equivalent: MS-001
Drawing No. C04-018
DS21093I-page 10
 2004 Microchip Technology Inc.
24LC164
8-Lead Plastic Small Outline (SN) – Narrow, 150 mil (SOIC)
E
E1
p
D
2
B
n
1
α
h
45°
c
A2
A
φ
β
L
Units
Dimension Limits
n
p
Number of Pins
Pitch
Overall Height
Molded Package Thickness
Standoff §
Overall Width
Molded Package Width
Overall Length
Chamfer Distance
Foot Length
Foot Angle
Lead Thickness
Lead Width
Mold Draft Angle Top
Mold Draft Angle Bottom
* Controlling Parameter
§ Significant Characteristic
A
A2
A1
E
E1
D
h
L
φ
c
B
α
β
MIN
.053
.052
.004
.228
.146
.189
.010
.019
0
.008
.013
0
0
A1
INCHES*
NOM
8
.050
.061
.056
.007
.237
.154
.193
.015
.025
4
.009
.017
12
12
MAX
.069
.061
.010
.244
.157
.197
.020
.030
8
.010
.020
15
15
MILLIMETERS
NOM
8
1.27
1.35
1.55
1.32
1.42
0.10
0.18
5.79
6.02
3.71
3.91
4.80
4.90
0.25
0.38
0.48
0.62
0
4
0.20
0.23
0.33
0.42
0
12
0
12
MIN
MAX
1.75
1.55
0.25
6.20
3.99
5.00
0.51
0.76
8
0.25
0.51
15
15
Notes:
Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed
.010” (0.254mm) per side.
JEDEC Equivalent: MS-012
Drawing No. C04-057
 2004 Microchip Technology Inc.
DS21093I-page 11
24LC164
ON-LINE SUPPORT
Microchip provides on-line support on the Microchip
World Wide Web (WWW) site.
The web site is used by Microchip as a means to make
files and information easily available to customers. To
view the site, the user must have access to the Internet
and a web browser, such as Netscape® or Microsoft®
Explorer. Files are also available for FTP download
from our FTP site.
Systems Information and Upgrade Hot Line
The Systems Information and Upgrade Line provides
system users a listing of the latest versions of all of
Microchip's development systems software products.
Plus, this line provides information on how customers
can receive any currently available upgrade kits.The
Hot Line Numbers are:
1-800-755-2345 for U.S. and most of Canada, and
1-480-792-7302 for the rest of the world.
Connecting to the Microchip Internet Web Site
The Microchip web site is available by using your
favorite Internet browser to attach to:
www.microchip.com
The file transfer site is available by using an FTP service to connect to:
ftp://ftp.microchip.com
The web site and file transfer site provide a variety of
services. Users may download files for the latest
Development Tools, Data Sheets, Application Notes,
User's Guides, Articles and Sample Programs. A variety of Microchip specific business information is also
available, including listings of Microchip sales offices,
distributors and factory representatives. Other data
available for consideration is:
• Latest Microchip Press Releases
• Technical Support Section with Frequently Asked
Questions
• Design Tips
• Device Errata
• Job Postings
• Microchip Consultant Program Member Listing
• Links to other useful web sites related to
Microchip Products
• Conferences for products, Development Systems,
technical information and more
• Listing of seminars and events
DS21093I-page 12
 2004 Microchip Technology Inc.
24LC164
READER RESPONSE
It is our intention to provide you with the best documentation possible to ensure successful use of your Microchip product. If you wish to provide your comments on organization, clarity, subject matter, and ways in which our documentation
can better serve you, please FAX your comments to the Technical Publications Manager at (480) 792-7578.
Please list the following information, and use this outline to provide us with your comments about this Data Sheet.
To:
Technical Publications Manager
RE:
Reader Response
Total Pages Sent
From: Name
Company
Address
City / State / ZIP / Country
Telephone: (_______) _________ - _________
FAX: (______) _________ - _________
Application (optional):
Would you like a reply?
Device: 24LC164
Y
N
Literature Number: DS21093I
Questions:
1. What are the best features of this document?
2. How does this document meet your hardware and software development needs?
3. Do you find the organization of this data sheet easy to follow? If not, why?
4. What additions to the data sheet do you think would enhance the structure and subject?
5. What deletions from the data sheet could be made without affecting the overall usefulness?
6. Is there any incorrect or misleading information (what and where)?
7. How would you improve this document?
8. How would you improve our software, systems, and silicon products?
 2004 Microchip Technology Inc.
DS21093I-page 13
24LC164
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.
PART NO.
Device
X
Temperature
Range
/XX
XXX
Package
Pattern
Device
24LC164: VDD range 2.5V to 5.5V
24LC164T: (Tape and Reel)
Temperature Range
I
=
=
0°C to +70°C
-40°C to +85°C
Package
P
SN
=
=
Plastic DIP (300 mil body), 8-lead
Plastic SOIC (150 mil body), 8-lead
Pattern
QTP, SQTP or Special Requirements. Blank for standard
devices.
Examples:
a)
24LC164–/P Commercial Temp,
PDIP package
b)
24LC164–/SN Commercial Temp.,
SOIC package
Sales and Support
Data Sheets
Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recommended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following:
1.
2.
3.
Your local Microchip sales office
The Microchip Corporate Literature Center U.S. FAX: (480) 792-7277
The Microchip Worldwide Site (www.microchip.com)
Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using.
New Customer Notification System
Register on our web site (www.microchip.com/cn) to receive the most current information on our products.
DS21093I-page 14
 2004 Microchip Technology Inc.
Note the following details of the code protection feature on Microchip devices:
•
Microchip products meet the specification contained in their particular Microchip Data Sheet.
•
Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
•
There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
•
Microchip is willing to work with the customer who is concerned about the integrity of their code.
•
Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Information contained in this publication regarding device
applications and the like is intended through suggestion only
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
No representation or warranty is given and no liability is
assumed by Microchip Technology Incorporated with respect
to the accuracy or use of such information, or infringement of
patents or other intellectual property rights arising from such
use or otherwise. Use of Microchip’s products as critical
components in life support systems is not authorized except
with express written approval by Microchip. No licenses are
conveyed, implicitly or otherwise, under any intellectual
property rights.
Trademarks
The Microchip name and logo, the Microchip logo, Accuron,
dsPIC, KEELOQ, microID, MPLAB, PIC, PICmicro, PICSTART,
PRO MATE, PowerSmart, rfPIC, and SmartShunt are
registered trademarks of Microchip Technology Incorporated
in the U.S.A. and other countries.
AmpLab, FilterLab, MXDEV, MXLAB, PICMASTER, SEEVAL,
SmartSensor and The Embedded Control Solutions Company
are registered trademarks of Microchip Technology
Incorporated in the U.S.A.
Analog-for-the-Digital Age, Application Maestro, dsPICDEM,
dsPICDEM.net, dsPICworks, ECAN, ECONOMONITOR,
FanSense, FlexROM, fuzzyLAB, In-Circuit Serial
Programming, ICSP, ICEPIC, Migratable Memory, MPASM,
MPLIB, MPLINK, MPSIM, PICkit, PICDEM, PICDEM.net,
PICLAB, PICtail, PowerCal, PowerInfo, PowerMate,
PowerTool, rfLAB, rfPICDEM, Select Mode, Smart Serial,
SmartTel and Total Endurance are trademarks of Microchip
Technology Incorporated in the U.S.A. and other countries.
SQTP is a service mark of Microchip Technology Incorporated
in the U.S.A.
All other trademarks mentioned herein are property of their
respective companies.
© 2004, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
Microchip received ISO/TS-16949:2002 quality system certification for
its worldwide headquarters, design and wafer fabrication facilities in
Chandler and Tempe, Arizona and Mountain View, California in
October 2003. The Company’s quality system processes and
procedures are for its PICmicro® 8-bit MCUs, KEELOQ® code hopping
devices, Serial EEPROMs, microperipherals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
 2004 Microchip Technology Inc.
DS21093I-page 15
WORLDWIDE SALES AND SERVICE
AMERICAS
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Corporate Office
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Japan
ASIA/PACIFIC
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Australia
Korea
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Denmark
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Parc d’Activite du Moulin de Massy
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Italy
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07/12/04
 2004 Microchip Technology Inc.