Microchip Technology Inc 24LC128-E-SM, 24LC128-E-P, 24LC128T-E-ST, 24LC128T-E-SN, 24LC128T-E-SM Datasheet



M

2

†
‡

™

C

CMOS Serial EEPROM

Temp

Ranges

I

I, E

128K I

DEVICE SELECTION TABLE

Part

Number

24AA128 1.8-5.5V 400 kHz
24LC128 2.5-5.5V 400 kHz

†

100 kHz for V

‡

100 kHz for E temperature range.

FEATURES

• Low power CMOS technology

- Maximum write current 3 mA at 5.5V

- Maximum read current 400 µ A at 5.5V

- Standby current 100 nA typical at 5.5V

• 2-wire serial interface bus, I

• Cascadable for up to eight devices

• Self-timed ERASE/WRITE cycle

• 64-byte page-write mode available

• 5 ms max write-cycle time

• Hardware write protect for entire array

• Output slope control to eliminate ground bounce

• Schmitt trigger inputs for noise suppression

• 1,000,000 erase/write cycles guaranteed

• Electrostatic discharge protection > 4000V

• Data retention > 200 years

• 8-pin PDIP and SOIC (150 and 208 mil) packages

• 14-pin TSSOP package

• Temperature ranges:

- Industrial (I): -40 ° C to +85 ° C

- Automotive (E): -40 ° C to +125 ° C

DESCRIPTION

CC

V

Range

CC

< 2.5V.

Max Clock
Frequency

2

C compatible

24AA128/24LC128

P ACKA GE TYPE

PDIP

A0

1

A1

2

A2

3

Vss

4

SOIC

V

TSSOP

A0
A1
A2

SS

A0
A1

NC
NC
NC

A2

Vss

1
2

3
4

1
2
3
4
5
6
7

BLOCK DIAGRAM

A0…A2

WP

24xx128

24xx128

14
13

24xx128

12
11
10
9
8

8

7
6

5

8
7

6
5

Vcc
WP
NC

NC
NC

SCL
SDA

Vcc

WP
SCL

SDA

VCC
WP
SCL
SDA

HV GENERATOR

The Microchip Technology Inc. 24AA128/24LC128
(24xx128*) is a 16K x 8 (128K bit) Serial Electrically
Erasable PROM, capable of operation across a broad
voltage range (1.8V to 5.5V). It has been developed for
advanced, low power applications such as personal
communications or data acquisition. This device also
has a page-write capability of up to 64 bytes of data.
This device is capable of both random and sequential
reads up to the 128K boundary. Functional address
lines allow up to eight devices on the same bus, for up
to 1M bit address space. This device is available in the
standard 8-pin plastic DIP, 8-pin SOIC (150 and
208 mil), and 14-pin TSSOP packages.

2

I

C is a trademark of Philips Corporation.

*24xx128 is used in this document as a generic part number for the 24AA128/24LC128 devices.

1998 Microchip Technology Inc. DS21191B-page 1

CONTROL

LOGIC

I/O

SDA

VCC

VSS

I/O

SCL

MEMORY

CONTROL

LOGIC

XDEC

EEPROM

ARRAY

PAGE LATCHES

YDEC

SENSE AMP

R/W CONTROL



24AA128/24LC128

≥

≥

µ

µ

µ

1.0 ELECTRICAL

TABLE 1-1 PIN FUNCTION TABLE

CHARACTERISTICS

1.1 Maximum Ratings*

CC

V

.................................................................................................7.0V

All inputs and outputs w.r.t. V

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

*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

All parameters apply across the
specified operating ranges, unless
otherwise noted.

Parameter Symbol Min Max Units Conditions

A0, A1, A2, SCL, SDA, and WP
pins:

High level input voltage V
Low level input voltage V

Hysteresis of Schmitt Trigger
inputs (SDA, SCL pins)

Low level output voltage V

Input leakage current I
Output leakage current I

Pin capacitance
(all inputs/outputs)

Operating current

Standby current I

Note: This parameter is periodically sampled and not 100% tested.

............................. -0.6V to V

SS

Industrial (I): V
Automotive (E): V

V

IN

C

I

CC

CC

I

+1.0V

CC

CC

= +1.8V to 5.5V Tamb = -40 ° C to +85 ° C
= +4.5V to 5.5V Tamb = -40 ° C to 125 ° C

CC

IH
IL

0.7 V

CC

— 0.3 V

0.2 V

HYS

LO

, C

OL

LI

OUT

CC

0.05 V

— 0.40 V I

-10 10

-10 10
—10pFV

Read — 400
Write — 3 mA V

CCS

—1 µ A

Name Function

A0, A1, A2 User Configurable Chip Selects

SS

V

Ground
SDA Serial Data
SCL Serial Clock

WP Write Protect Input

CC

V

+1.8 to 5.5V (24AA128)

+2.5 to 5.5V (24LC128)

—V

V

V

CC
CC

V

—VV

A
AV

AV

2.5V

CC

V

CC

< 2.5V

CC

2.5V (Note)

OL

= 3.0 mA @ V

OL

I

= 2.1 mA @ V

V

IN

= V

SS

or V

CC

, WP = V

V

= V

or V

IN

SS
OUT
CC

SS

= V

= 5.0V (Note)

Tamb = 25 ° C, f

CC

= 5.5V, SCL = 400 kHz

CC

= 5.5V

SCL = SDA = V

CC

or V

, WP = V

CC

= 1 MHz

c

CC

A0, A1, A2, WP = V

CC

= 4.5V

CC

= 2.5V

= 5.5V

SS

SS
CC

FIGURE 1-1: BUS TIMING DATA

TF

SCL

SDA
IN

SDA
OUT

WP

DS21191B-page 2

TSU:STA

TSP

TLOW

THD:STA

THIGH

THD:DAT TSU:DAT TSU:STO

TAA

(protected)

(unprotected)

VHYS

TR

TSU:WP

TBUF

THD:WP

1998 Microchip Technology Inc.

TABLE 1-3 AC CHARACTERISTICS

24AA128/24LC128



All parameters apply across the spec­ified operating ranges unless other­wise noted.

Parameter Symbol Min Max Units Conditions

Clock frequency FCLK —

Clock high time THIGH 4000

Clock low time TLOW 4700

SDA and SCL rise time
(Note 1)

SDA and SCL fall time T
START condition hold time THD:STA 4000

START condition setup time TSU:STA 4700

Data input hold time THD:DAT 0 — ns (Note 2)
Data input setup time TSU:DAT 250

STOP condition setup time TSU:STO 4000

WP setup time TSU:WP 4000

WP hold time THD:WP 4700

Output valid from clock
(Note 2)

Bus free time: Time the bus must be
free before a new transmission can
start

Output fall time from VIH
minimum to VIL maximum

Input filter spike suppression
(SDA and SCL pins)

Write cycle time (byte or page) TWC —5
Endurance 1M — cycles 25°C, V

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 T

suppression. This eliminates the need for a TI specification for standard operation.

4: This parameter is not tested but guaranteed b y characterization. F or endurance estimates in a specific application, please

consult the Total Endurance Model which can be obtained on Microchip’s BBS or website.

SP and VHYS specifications are due to new Schmitt trigger inputs which provide improved noise spike

Industrial (I): V
Automotive (E): V

TR —

F — 300 ns (Note 1)

TAA —

TBUF 4700

TOF 10 250 ns CB ≤ 100 pF (Note 1)

TSP — 50 ns (Notes 1 and 3)

CC = +1.8V to 5.5V Tamb = -40°C to +85°C
CC = +4.5V to 5.5V Tamb = -40°C to 125°C

—
—

4000

600

4700
1300

—
—

4000

600

4700

600

250
100

4000

600

4000

600

4700
1300

—
—

4700
1300

100
100
400

1000
1000

300

3500
3500

900

kHz 4.5V ≤ VCC ≤ 5.5V (E Temp range)

1.8V ≤ VCC ≤ 2.5V

2.5V ≤ VCC ≤ 5.5V

—
—
—

—
—
—

—
—
—

—
—
—

—
—
—

—
—
—

—
—
—

—
—
—

—
—
—

ns 4.5V ≤ VCC ≤ 5.5V (E Temp range)

1.8V ≤ VCC ≤ 2.5V

2.5V ≤ VCC ≤ 5.5V

ns 4.5V ≤ VCC ≤ 5.5V (E Temp range)

1.8V ≤ VCC ≤ 2.5V

2.5V ≤ VCC ≤ 5.5V

ns 4.5V ≤ VCC ≤ 5.5V (E Temp range)

1.8V ≤ VCC ≤ 2.5V

2.5V ≤ VCC ≤ 5.5V

ns 4.5V ≤ VCC ≤ 5.5V (E Temp range)

1.8V ≤ VCC ≤ 2.5V

2.5V ≤ VCC ≤ 5.5V

ns 4.5V ≤ VCC ≤ 5.5V (E Temp range)

1.8V ≤ VCC ≤ 2.5V

2.5V ≤ VCC ≤ 5.5V

ns 4.5V ≤ VCC ≤ 5.5V (E Temp range)

1.8V ≤ VCC ≤ 2.5V

2.5V ≤ VCC ≤ 5.5V

ns 4.5V ≤ VCC ≤ 5.5V (E Temp range)

1.8V ≤ VCC ≤ 2.5V

2.5V ≤ VCC ≤ 5.5V

ns 4.5V ≤ VCC ≤ 5.5V (E Temp range)

1.8V ≤ VCC ≤ 2.5V

2.5V ≤ VCC ≤ 5.5V

ns 4.5V ≤ VCC ≤ 5.5V (E Temp range)

1.8V ≤ VCC ≤ 2.5V

2.5V ≤ VCC ≤ 5.5V

ns 4.5V ≤ VCC ≤ 5.5V (E Temp range)

1.8V ≤ VCC ≤ 2.5V

2.5V ≤ VCC ≤ 5.5V

ns 4.5V ≤ VCC ≤ 5.5V (E Temp range)

1.8V ≤ VCC ≤ 2.5V

2.5V ≤ VCC ≤ 5.5V

ms

CC = 5.0V, Block Mode (Note 4)

1998 Microchip Technology Inc. DS21191B-page 3

24AA128/24LC128

2.0 PIN DESCRIPTIONS

2.1 A0, A1, A2 Chip Address Inputs

The A0, A1, A2 inputs are used by the 24xx128 for
multiple device operations. The levels on these inputs
are compared with the corresponding bits in the slave
address. The chip is selected if the compare is true.

Up to eight devices may be connected to the same b us
by using different chip select bit combinations. If left
unconnected, these inputs will be pulled down inter­nally to V

2.2 SDA Serial Data

This is a bi-directional pin used to transfer addresses
and data into and data out of the device. It is an open­drain terminal, therefore, the SDA b us requires a pullup
resistor to V
400 kHz)

For normal data transfer SD A is allowed to change only
during SCL low. Changes during SCL high are
reserved for indicating the START and STOP condi­tions.

2.3 SCL Serial Clock

This input is used to synchronize the data transfer from
and to the device.

SS.

CC (typical 10 kΩ for 100 kHz, 2 kΩ for

4.0 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 whenev er 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 4-1).

4.1 Bus not Busy (A)

Both data and clock lines remain HIGH.

4.2 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.

4.3 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 end with a STOP condition.

4.4 Data Valid (D)

2.4 WP

This pin can be connected to either VSS, VCC or left
floating. An internal pull-down resistor on this pin will
keep the device in the unprotected state if left floating.
If tied to V
is enabled (read/write the entire memory 0000-3FFF).

If tied to V
operations are not affected.

SS or left floating, normal memory operation

CC, WRITE operations are inhibited. Read

3.0 FUNCTIONAL DESCRIPTION

The 24xx128 supports a bi-directional 2-wire bus and
data transmission protocol. A device that sends data
onto the bus is defined as a transmitter, and a device
receiving data as a receiver. The bus must 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 24xx128
works as a slave. Both master and slav e can operate as
a transmitter or receiver, but the master device deter­mines which mode is activated.

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 bit of data per
clock pulse.

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.

4.5 Acknowledge

Each receiving device, when addressed, is obliged to
generate an acknowledge signal after the reception of
each byte. The master device must generate an extra
clock pulse which is associated with this acknowledge
bit.

Note: The 24xx128 does not generate any

acknowledge bits if an internal program­ming cycle is in progress.

A device that acknowledges must pull down the SDA
line during the acknowledge clock pulse in such a way
that the SDA line is stable LO W 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 (24xx128) will lea ve the data line HIGH
to enable the master to generate the STOP condition.

DS21191B-page 4  1998 Microchip Technology Inc.

24AA128/24LC128

FIGURE 4-1: DATA TRANSFER SEQUENCE ON THE SERIAL BUS

(A) (B) (D) (D) (C) (A)

SCL

SDA

START

CONDITION

ADDRESS OR

ACKNOWLEDGE

VALID

FIGURE 4-2: ACKNOWLEDGE TIMING

SCL

SDA

Transmitter must release the SDA line at this point
allowing the Receiver to pull the SDA line low to
acknowledge the previous eight bits of data.

Data from transmitter

DATA

ALLOWED

TO CHANGE

Acknowledge

STOP

CONDITION

Bit

987654321 123

Data from transmitter

Receiver must release the SDA line at this point
so the Transmitter can continue sending data.

 1998 Microchip Technology Inc. DS21191B-page 5

24AA128/24LC128

5.0 DEVICE ADDRESSING

A control byte is the first byte received following the
start condition from the master device (Figure 5-1). The
control byte consists of a 4-bit control code; for the
24xx128 this is set as 1010 binary for read and write
operations. The next three bits of the control byte are
the chip select bits (A2, A1, A0). The chip select bits
allow the use of up to eight 24xx128 devices on the
same bus and are used to select which device is
accessed. The chip select bits in the control byte must
correspond to the logic levels on the corresponding A2,
A1, and A0 pins for the device to respond. 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 a one a read operation is
selected, and when set to a zero a write operation is
selected. The next two bytes received define the
address of the first data byte (Figure 5-2). Because
only A13…A0 are used, the upper two address bits are
don’t care bits. The upper address bits are transferred
first, followed by the less significant bits.

Following the start condition, the 24xx128 monitors the
SDA bus checking the device type identifier being
transmitted. Upon receiving a 1010 code and appropri­ate device select bits, the slave device outputs an
acknowledge signal on the SD A line. Depending on the
state of the R/W
write operation.

bit, the 24xx128 will select a read or

FIGURE 5-1: CONTROL BYTE FORMAT

Read/Wr

Control Code

1 0 1 0 A2 A1 A0SACKR/W

Slave Address

Start Bit

ite Bit

Chip Select

Bits

Acknowledge Bit

5.1 Contiguous Addressing Across

Multiple Devices

The chip select bits A2, A1, A0 can be used to expand
the contiguous address space for up to 1 Mbit by add­ing up to eight 24xx128's on the same bus. In this case,
software can use A0 of the control b
A14; A1, as address bit A15; and A2, as address bit
A16. It is not possible to sequentially read across
device boundaries.

yte as address bit

FIGURE 5-2: ADDRESS SEQUENCE BIT ASSIGNMENTS

CONTROL BYTE ADDRESS HIGH BYTE ADDRESS LOW BYTE

A

1010

CONTROL

CODE

A2A1A

CHIP

SELECT

BITS

R/W XX

0

13

A

12

A11A10A

A

9

8

A

••••••

7

X = Don’t Care Bit

A
0

DS21191B-page 6  1998 Microchip Technology Inc.

24AA128/24LC128

6.0 WRITE OPERATIONS

6.1 Byte Write

Following the start condition from the master, the
control code (four bits), the chip select (three bits), and
the R/W
bus by the master transmitter. This indicates to the
addressed slave receiver that the address high b yte will
follow after it has generated an ac kno wledge bit during
the ninth clock cycle. Therefore, the next byte
transmitted by the master is the high-order byte of the
word address and will be written into the address
pointer of the 24xx128. The next byte is the least signif­icant address byte. After receiving another acknowl­edge signal from the 24xx128, the master device will
transmit the data word to be written into the addressed
memory location. The 24xx128 acknowledges again
and the master generates a stop condition. This ini­tiates the internal write cycle, and, during this time, the
24xx128 will not generate acknowledge signals
(Figure 6-1). If an attempt is made to write to the array
with the WP pin held high, the device will acknowledge
the command but no write cycle will occur, no data will
be written, and the device will immediately accept a
new command. After a byte write command, the inter­nal address counter will point to the address location
following the one that was just written.

bit (which is a logic low) are clocked onto the

6.2 Page Write

The write control byte, word address, and the first data
byte are transmitted to the 24xx128 in the same wa y as
in a byte write. But instead of generating a stop condi­tion, the master transmits up to 63 additional bytes,
which are temporarily stored in the on-chip page buffer
and will be written into memory after the master has
transmitted a stop condition. After receipt of each w ord,
the six lower address pointer bits are internally
incremented by one. If the master should transmit more
than 64 bytes 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 6-2). If an attempt is
made to write to the array with the WP pin held high, the
device will acknowledge the command but no write
cycle will occur, no data will be written, and the device
will immediately accept a new command.

6.3 Write Protection

The WP pin allows the user to write-protect the entire
array (0000-3FFF) when the pin is tied to V
V

SS or left floating, the write protection is disabled. The

WP pin is sampled at the STOP bit for every write
command (Figure 1-1) Toggling the WP pin after the
STOP bit will have no effect on the execution of the
write cycle.

CC. If tied to

FIGURE 6-1: BYTE WRITE

BUS ACTIVITY
MASTER

SDA LINE

BUS ACTIVITY

X = don’t care bit

S
T
A
R
T

S1010 0

FIGURE 6-2: PAGE WRITE

S

T
BUS ACTIVITY
MASTER

SDA LINE

BUS ACTIVITY

X = don’t care bit

CONTROL

A

BYTE

R

T

S1010 0

A2A1A

CONTROL

0

BYTE

XX

A
C
K

A1A

A

0

2

A
C
K

ADDRESS

HIGH BYTE

ADDRESS

HIGH BYTE

XX

A
C
K

A
C
K

ADDRESS
LOW BYTE

ADDRESS
LOW BYTE

DATA BYTE 0

A
C
K

S

DATA

A
C
K

A
C
K

T
O
P

P

A
C
K

DATA BYTE 63

S
T
O
P

P

A
C
K

 1998 Microchip Technology Inc. DS21191B-page 7

24AA128/24LC128

7.0 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
with the write cycle, then no ACK will be returned. If no
ACK is returned, then the start bit and control byte must
be resent. 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 7-1 for
flow diagram.

= 0). If the de vice is still busy

FIGURE 7-1: ACKNOWLEDGE POLLING

FLOW

Send

Write Command

Send Stop

Condition to

Initiate Write Cycle

Send Start

Send Control Byte

with R/W = 0

Did Device

Acknowledge

(ACK = 0)?

YES

NO

Next

Operation

DS21191B-page 8  1998 Microchip Technology Inc.

24AA128/24LC128

8.0 READ OPERATION

Read operations are initiated in the same way as write
operations with the exception that the R/W
control byte is set to one. There are three basic types
of read operations: current address read, random read,
and sequential read.

8.1 Current Address Read

The 24xx128 contains an address counter that main­tains the address of the last word accessed, internally
incremented by one. Therefore, if the previous read
access was to address n (n is any legal address), the
next current address read operation would access data
from address n + 1.

Upon receipt of the control byte with R/W
the 24xx128 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
24xx128 discontinues transmission (Figure 8-1).

FIGURE 8-1: CURRENT ADDRESS READ

S

BUS ACTIVITY
MASTER

SDA LINE

BUS ACTIVITY

T

CONTROL

A
R
T

S

1100

BYTE

AAA
210

1

A
C
K

bit of the

bit set to one,

DATA
BYTE

N

O
A

C
K

S
T
O
P

P

8.2 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
24xx128 as part of a write operation (R/W

bit set to 0).
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 one. The
24xx128 will then issue an acknowledge and transmit
the 8-bit data word. The master will not acknowledge
the transfer but does generate a stop condition which
causes the 24xx128 to discontinue transmission
(Figure 8-2). After a random read command, the inter­nal address counter will point to the address location
following the one that was just read.

8.3 Sequential Read

Sequential reads are initiated in the same way as a ran­dom read except that after the 24xx128 transmits the
first data byte, the master issues an acknowledge as
opposed to the stop condition used in a random read.
This acknowledge directs the 24xx128 to transmit the
next sequentially addressed 8-bit word (Figure 8-3).
Following the final byte transmitted to the master, the
master will NOT generate an ackno wledge but will gen­erate a stop condition. T o pro vide sequential reads , the
24xx128 contains an internal address pointer which is
incremented by one at the completion of each opera­tion. This address pointer allows the entire memory
contents to be serially read during one operation. The
internal address pointer will automatically roll over from
address 3FFF to address 0000 if the master acknowl­edges the byte received from the array address 3FFF.

FIGURE 8-2: RANDOM READ

BUS ACTIVITY
MASTER

SDA LINE

BUS ACTIVITY

X = Don’t Care Bit

S
T

CONTROL

A
R

BYTE

T

S1010

AAA
210

0

A
C
K

ADDRESS

HIGH BYTE

XX

A
C
K

ADDRESS

LOW BYTE

S
T
A
R
T

S1010

A
C
K

CONTROL

BYTE

AAA
210

DATA

BYTE

1

A
C
K

S
T
O
P

P

N
O

A
C
K

FIGURE 8-3: SEQUENTIAL READ

BUS ACTIVITY
MASTER

SDA LINE

BUS ACTIVITY

 1998 Microchip Technology Inc. DS21191B-page 9

CONTROL

BYTE

DATA n DATA n + 1 DATA n + 2 DATA n + X

A
C
K

A
C
K

A
C
K

A
C
K

S
T
O
P

P

N
O

A
C
K

24AA128/24LC128

NOTES:

DS21191B-page 10  1998 Microchip Technology Inc.

24AA128/24LC128

24xx128 PRODUCT IDENTIFICATION SYSTEM

To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.

24xx128 — /P

P = Plastic DIP (300 mil Body), 8-lead

Package:

Temperature
Range:

Device:

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. Your local Microchip sales office

2. The Microchip Corporate Literature Center U.S. FAX: [phone]

3. The Microchip’s Bulletin Board, via your local CompuServe number (CompuServe membership NOT required).
Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using.

SM = Plastic SOIC (208 mil Body, EIAJ standard), 8-lead

SN = Plastic SOIC (150 mil Body), 8-lead

ST = TSSOP, 14-lead

I = -40°C to +85°C

E = -40°C to +125°C

2

24AA128 128K bit 1.8V I

24AA128T 128K bit 1.8V I

24LC128 128K bit 2.5V I

24LC128T 128K bit 2.5V I

C Serial EEPROM

2

C Serial EEPROM (Tape and Reel)

2

C Serial EEPROM

2

C Serial EEPROM (Tape and Reel)

 1998 Microchip Technology Inc. DS21191B-page 11



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AMERICAS

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12/30/97

All rights reserved. © 1998, Microchip Technology Incorporated, USA. 1/98 Printed on recycled paper.

Information contained in this publication regarding device applications and the like is intended for suggestion only and may be superseded by updates. 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. The Microchip logo and name are registered trademarks of Microchip Technology Inc. in the U.S.A. and other countries. All rights reserved. All other
trademarks mentioned herein are the property of their respective companies.

DS21191B-page 12

1998 Microchip Technology Inc.