24AA128/24LC128/24FC128
128K I
2
C
™
CMOS Serial EEPROM
Device Selection Table
Part
Number
24AA128
24LC128
24FC128
Note 1:
2:
V
CC
Range
1.8-5.5V
2.5-5.5V
1.8-5.5V
Max. Clock
Frequency
400 kHz
(1)
400 kHz
1 MHz
(2)
Temp.
Ranges
I
I, E
I
Description
The Microchip Technology Inc. 24AA128/24LC128/
24FC128 (24XX128*) is a 16K x 8 (128 Kbit) Serial
Electrically Erasable PROM (EEPROM), 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 capabil-
ity 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 1 Mbit address
space. This device is available in the standard 8-pin
plastic DIP, SOIC (150 and 208 mil), TSSOP, MSOP,
DFN and 14-lead TSSOP packages.
100 kHz for V
CC
< 2.5V.
400 kHz for V
CC
< 2.5V.
Features
• Low-power CMOS technology:
- Maximum write current 3 mA at 5.5V
- Maximum read current 400
µA
at 5.5V
- Standby current 100 nA typical at 5.5V
• 2-wire serial interface bus, I
2
C™ compatible
• 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
• Electrostatic discharge protection > 4000V
• Data retention > 200 years
• 8-pin PDIP, SOIC, TSSOP, MSOP and DFN
packages, 14-lead TSSOP package
• Standard and Pb-free finishes available
• Temperature ranges:
- Industrial (I):
-40°C to +85°C
- Automotive (E):
-40°C to +125°C
Block Diagram
A0 A1 A2 WP
HV Generator
I/O
C
ontrol
L
ogic
M
emory
C
ontrol
L
ogic
XDEC
EEPROM
Array
Page Latches
I/O
SCL
YDEC
SDA
V
CC
V
SS
Sense Amp.
R/W Control
Package Types
PDIP/SOIC
A0
A1
A2
V
SS
1
24XX128
2
3
4
8
7
6
5
V
CC
WP
SCL
SDA
A0
A1
A2
V
SS
TSSOP/MSOP *
1
24XX128
2
3
4
8
7
6
5
V
CC
WP
SCL
SDA
A0
A1
NC
NC
NC
A2
V
SS
1
2
3
4
5
6
7
TSSOP
14
13
12
11
10
9
8
V
CC
WP
NC
NC
NC
SCL
SDA
A0
A1
A2
V
SS
1
24XX128
2
3
4
DFN
8 V
CC
7 WP
6 SCL
5 SDA
24XX128
Note: *
Pins A0 and A1 are no-connects for the MSOP package only.
*24XX128 is used in this document as a generic part number for the 24AA128/24LC128/24FC128 devices.
2004 Microchip Technology Inc.
DS21191M-page 1
24AA128/24LC128/24FC128
1.0
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings
(†)
V
CC
.............................................................................................................................................................................6.5V
All inputs and outputs w.r.t. V
SS
......................................................................................................... -0.6V to V
CC
+1.0V
Storage temperature ...............................................................................................................................-65°C to +150°C
Ambient temperature with power applied ................................................................................................-40°C to +125°C
ESD protection on all pins
......................................................................................................................................................≥
4 kV
† NOTICE: Stresses above those listed under “Absolute 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 1-1:
DC CHARACTERISTICS
Electrical Characteristics:
Industrial (I):
V
CC
= +1.8V to 5.5V T
A
= -40°C to +85°C
Automotive (E): V
CC
= +2.5V to 5.5V T
A
= -40°C to 125°C
Characteristic
A0, A1, A2, SCL, SDA, and
WP pins:
High-level input voltage
Low-level input voltage
Hysteresis of Schmitt Trigger
inputs (SDA, SCL pins)
Low-level output voltage
Input leakage current
Output leakage current
Pin capacitance
(all inputs/outputs)
Min.
—
0.7 V
CC
—
0.05 V
CC
—
—
—
—
—
—
Standby current
—
Max.
—
—
0.3 V
CC
0.2 V
CC
—
0.40
±1
±1
10
400
3
1
Units
—
V
V
V
V
V
µA
µA
pF
µA
mA
µA
—
—
V
CC
≥
2.5V
V
CC
< 2.5V
V
CC
≥
2.5V
(Note 1)
I
OL
= 3.0 mA @ V
CC
= 4.5V
I
OL
= 2.1 mA @ V
CC
= 2.5V
V
IN
= V
SS
or V
CC
, WP = V
SS
V
IN
= V
SS
or V
CC
, WP = V
CC
V
OUT
= V
SS
or V
CC
V
CC
= 5.0V
(Note 1)
T
A
= 25°C, f
C
= 1 MHz
V
CC
= 5.5V, SCL = 400 kHz
V
CC
= 5.5V
T
A
= -40°C to +85°C
SCL = SDA = V
CC
= 5.5V
A0, A1, A2, WP = V
SS
T
A
= -40°C to 125°C
SCL = SDA = V
CC
= 5.5V
A0, A1, A2, WP = V
SS
Conditions
DC CHARACTERISTICS
Param.
No.
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
Sym.
—
V
IH
V
IL
V
HYS
V
OL
I
LI
I
LO
C
IN
,
C
OUT
I
CC
Write
I
CCS
I
CC
Read Operating current
—
5
µA
Note 1:
This parameter is periodically sampled and not 100% tested.
DS21191M-page 2
2004 Microchip Technology Inc.
24AA128/24LC128/24FC128
TABLE 1-2:
AC CHARACTERISTICS
Electrical Characteristics:
Industrial (I):
V
CC
= +1.8V to 5.5V T
A
= -40°C to +85°C
Automotive (E): V
CC
= +2.5V to 5.5V T
A
= -40°C to 125°C
Min.
—
—
—
—
4000
600
600
500
4700
1300
1300
500
—
—
—
—
—
4000
600
600
250
4700
600
600
250
0
250
100
100
4000
600
600
250
4000
600
600
Max.
100
400
400
1000
—
—
—
—
—
—
—
—
1000
300
300
300
100
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Units
kHz
Conditions
1.8V
≤
V
CC
<
2.5V
2.5V
≤
V
CC
≤
5.5V
1.8V
≤
V
CC
<
2.5V 24FC128
2.5V
≤
V
CC
≤
5.5V 24FC128
1.8V
≤
V
CC
<
2.5V
2.5V
≤
V
CC
≤
5.5V
1.8V
≤
V
CC
<
2.5V 24FC128
2.5V
≤
V
CC
≤
5.5V 24FC128
1.8V
≤
V
CC
<
2.5V
2.5V
≤
V
CC
≤
5.5V
1.8V
≤
V
CC
<
2.5V 24FC128
2.5V
≤
V
CC
≤
5.5V 24FC128
1.8V
≤
V
CC
<
2.5V
2.5V
≤
V
CC
≤
5.5V
1.8V
≤
V
CC
≤
5.5V 24FC128
All except, 24FC128
1.8V
≤
V
CC
≤
5.5V 24FC128
1.8V
≤
V
CC
<
2.5V
2.5V
≤
V
CC
≤
5.5V
1.8V
≤
V
CC
<
2.5V 24FC128
2.5V
≤
V
CC
≤
5.5V 24FC128
1.8V
≤
V
CC
<
2.5V
2.5V
≤
V
CC
≤
5.5V
1.8V
≤
V
CC
<
2.5V 24FC128
2.5V
≤
V
CC
≤
5.5V 24FC128
(Note 2)
1.8V
≤
V
CC
<
2.5V
2.5V
≤
V
CC
≤
5.5V
1.8V
≤
V
CC
≤
5.5V 24FC128
1.8 V
≤
V
CC
<
2.5V
2.5 V
≤
V
CC
≤
5.5V
1.8V
≤
V
CC
<
2.5V 24FC128
2.5 V
≤
V
CC
≤
5.5V 24FC128
1.8V
≤
V
CC
<
2.5V
2.5V
≤
V
CC
≤
5.5V
1.8V
≤
V
CC
≤
5.5V 24FC128
AC CHARACTERISTICS
Param.
No.
1
Sym.
F
CLK
Characteristic
Clock frequency
2
T
HIGH
Clock high time
ns
3
T
LOW
Clock low time
ns
4
T
R
SDA and SCL rise time
(Note 1)
SDA and SCL fall time
(Note 1)
ns
5
6
T
F
ns
ns
T
HD
:
ST
Start condition hold time
A
7
T
SU
:
ST
Start condition setup time
A
ns
8
9
T
HD
:
DA
Data input hold time
T
ns
ns
T
SU
:
DA
Data input setup time
T
10
T
SU
:
ST
Stop condition setup time
O
ns
11
T
SU
:
WP
WP setup time
ns
Note 1:
Not 100% tested. C
B
= 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
SP
and V
HYS
specifications are due to new Schmitt Trigger inputs, which provide improved
noise spike suppression. This eliminates the need for a T
I
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 from Microchip’s web site:
www.microchip.com.
2004 Microchip Technology Inc.
DS21191M-page 3
24AA128/24LC128/24FC128
TABLE 1-2:
AC CHARACTERISTICS (CONTINUED)
Electrical Characteristics:
Industrial (I):
V
CC
= +1.8V to 5.5V T
A
= -40°C to +85°C
Automotive (E): V
CC
= +2.5V to 5.5V T
A
= -40°C to 125°C
Min.
4700
1300
1300
—
—
—
—
4700
1300
1300
500
10 + 0.1C
B
Max.
—
—
—
3500
900
900
400
—
—
—
—
250
250
50
5
—
Units
ns
Conditions
1.8V
≤
V
CC
<
2.5V
2.5V
≤
V
CC
≤
5.5V
1.8V
≤
V
CC
≤
5.5V 24FC128
1.8V
≤
V
CC
<
2.5V
2.5V
≤
V
CC
≤
5.5V
1.8V
≤
V
CC
<
2.5V 24FC128
2.5V
≤
V
CC
≤
5.5V 24FC128
1.8V
≤
V
CC
<
2.5V
2.5V
≤
V
CC
≤
5.5V
1.8V
≤
V
CC
<
2.5V 24FC128
2.5V
≤
V
CC
≤
5.5V 24FC128
All except, 24FC128
(Note 1)
24FC128
(Note 1)
All except, 24FC128
(Notes 1
and 3)
—
AC CHARACTERISTICS
Param.
No.
12
Sym.
Characteristic
T
HD
:
WP
WP hold time
13
T
AA
Output valid from clock
(Note 2)
ns
14
T
BUF
Bus free time: Time the bus
must be free before a new
transmission can start
Output fall time from V
IH
minimum to V
IL
maximum
C
B
≤
100 pF
Input filter spike suppression
(SDA and SCL pins)
Write cycle time (byte or
page)
Endurance
ns
15
T
OF
ns
16
17
18
T
SP
T
WC
—
—
—
1,000,000
ns
ms
cycles 25°C
(Note 4)
Note 1:
Not 100% tested. C
B
= 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
SP
and V
HYS
specifications are due to new Schmitt Trigger inputs, which provide improved
noise spike suppression. This eliminates the need for a T
I
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 from Microchip’s web site:
www.microchip.com.
FIGURE 1-1:
BUS TIMING DATA
5
D4
4
2
SCL
SDA
IN
7
6
16
3
8
9
10
13
SDA
OUT
(protected)
(unprotected)
14
WP
11
12
DS21191M-page 4
2004 Microchip Technology Inc.
24AA128/24LC128/24FC128
2.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1:
Name
A0
A1
(NC)
A2
V
SS
SDA
SCL
(NC)
WP
V
CC
PIN FUNCTION TABLE
8-pin
PDIP
1
2
—
3
4
5
6
—
7
8
8-pin
SOIC
1
2
—
3
4
5
6
—
7
8
8-pin
TSSOP
1
2
—
3
4
5
6
—
7
8
14-pin
TSSOP
1
2
3, 4, 5
6
7
8
9
10, 11,12
13
14
8-pin
MSOP
—
—
1, 2
3
4
5
6
—
7
8
8-pin
DFN
1
2
—
3
4
5
6
—
7
8
Function
User Configurable Chip Select
User Configurable Chip Select
Not Connected
User Configurable Chip Select
Ground
Serial Data
Serial Clock
Not Connected
Write-Protect Input
+1.8V to 5.5V (24AA128)
+2.5V to 5.5V (24LC128)
+1.8V to 5.5V (24FC128)
2.1
A0, A1, A2 Chip Address Inputs
2.3
Serial Clock (SCL)
The A0, A1 and 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.
For the MSOP package only, pins A0 and A1 are not
connected.
Up to eight devices (two for the MSOP package) may
be connected to the same bus by using different Chip
Select bit combinations. If these pins are left uncon-
nected, the inputs will be pulled down internally to
V
SS
. If they are tied to V
CC
or driven high, the internal
pull-down circuitry is disabled.
In most applications, the chip address inputs A0, A1,
and A2 are hard-wired to logic ‘0’ or logic ‘1’. For
applications in which these pins are controlled by a
microcontroller or other programmable device, the chip
address pins must be driven to logic ‘0’ or logic ‘1’
before normal device operation can proceed.
This input is used to synchronize the data transfer to
and from the device.
2.4
Write-Protect (WP)
This pin can be connected to either V
SS
, V
CC
or left
floating. Internal pull-down circuitry on this pin will keep
the device in the unprotected state if left floating. If tied
to V
SS
or left floating, normal memory operation is
enabled (read/write the entire memory 0000-3FFF).
If tied to V
CC
, write operations are inhibited. Read
operations are not affected.
3.0
FUNCTIONAL DESCRIPTION
2.2
Serial Data (SDA)
This is a bidirectional pin used to transfer addresses
and data into and out of the device. It is an open drain
terminal. Therefore, the SDA bus requires a pull-up
resistor to V
CC
(typical 10 kΩ for 100 kHz, 2 kΩ for
400 kHz and 1 MHz).
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.
The 24XX128 supports a bidirectional 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 slave can
operate as a transmitter or receiver, but the master
device determines which mode is activated.
2004 Microchip Technology Inc.
DS21191M-page 5
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