24AA32A/24LC32A
32K I
2
C
™
Serial EEPROM
Device Selection Table
Part
Number
24AA32A
24LC32A
Note 1:
V
CC
Range
1.7-5.5
2.5-5.5
Max. Clock
Frequency
400 kHz
(1)
400 kHz
Temp.
Ranges
I
I, E
Description:
The Microchip Technology Inc. 24AA32A/24LC32A
(24XX32A*) is a 32 Kbit Electrically Erasable PROM.
The device is organized as a single block of 4K x 8-bit
memory with a 2-wire serial interface. Low-voltage
design permits operation down to 1.7V, with standby
and active currents of only 1
A
and 1 mA,
respectively. It has been developed for advanced, low-
power applications such as personal communications
or data acquisition. The 24XX32A also has a page write
capability for up to 32 bytes of data. Functional address
lines allow up to eight devices on the same bus, for up
to 256 Kbits address space. The 24XX32A is available
in the standard 8-pin PDIP, surface mount SOIC, SOIJ,
TSSOP, DFN, TDFN and MSOP packages. The
24XX32A is also available in the 5-lead SOT-23 and
Chip Scale packages.
100 kHz for V
CC
<2.5V.
Features:
• Single Supply with Operation down to 1.7V for
24AA32A Devices, 2.5V for 24LC32A Devices
• Low-Power CMOS Technology:
- Active current 1 mA, typical
- Standby current 1
A,
typical
• 2-Wire Serial Interface, I
2
C™ Compatible
• Schmitt Trigger Inputs for Noise Suppression
• Output Slope Control to Eliminate Ground Bounce
• 100 kHz and 400 kHz Clock Compatibility
• Page Write Time 5 ms max.
• Self-Timed Erase/Write Cycle
• 32-Byte Page Write Buffer
• Hardware Write-Protect
• ESD Protection > 4,000V
• More than 1 Million Erase/Write Cycles
• Data Retention > 200 Years
• Factory Programming Available
• Packages Include 8-lead PDIP, SOIC, SOIJ,
TSSOP, X-Rotated TSSOP, MSOP, DFN, TDFN,
5-lead SOT-23 and Chip Scale
• Pb-Free and RoHS Compliant
• 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
Control
Logic
Memory
Control
Logic
XDEC
EEPROM
Array
Page Latches
I/O
SDA
Vcc
V
SS
SCL
YDEC
Sense Amp.
R/W Control
Package Types
PDIP/MSOP/SOIC/SOIJ/TSSOP
A0
A1
A2
V
SS
1
2
3
4
8
7
6
5
V
CC
WP
SCL
SDA
SOT-23
X-Rotated TSSOP
(X/ST)
SCL
SCL
SDA
V
SS
SDA
A2
DFN/TDFN
5
WP
A0 1
A1 2
4
V
CC
A2 3
V
SS
4
8 V
CC
7 WP
6 SCL
5 SDA
CS (Chip Scale)
(1)
V
CC
WP
SCL
1
2
3
WP
V
CC
A0
A1
1
2
3
4
8
7
6
5
V
SS
1
3
4
2 V
SS
5 SDA
(Top Down View,
Balls Not Visible)
Note
1:
Available in I-temp, “AA” only.
*24XX32A is used in this document as a generic part number for the 24AA32A/24LC32A devices.
2002-2012 Microchip Technology Inc.
DS21713M-page 1
24AA32A/24LC32A
1.0
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings
(†)
V
CC
.............................................................................................................................................................................6.5V
All inputs and outputs w.r.t. V
SS
......................................................................................................... -0.3V 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
Industrial (I):
T
A
= -40°C to +85°C, V
CC
= +1.7V to +5.5V
Automotive (E): T
A
= -40°C to +125°C, V
CC
= +2.5V to +5.5V
Min.
—
DC CHARACTERISTICS
Param.
Symbol
No.
D1
D2
D3
D4
—
V
IH
V
IL
V
HYS
Characteristic
A0, A1, A2, WP, SCL
and SDA 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)
Typ.
—
—
—
—
Max.
—
—
0.3 V
CC
0.2 V
CC
—
Units
—
V
V
V
V
—
—
Conditions
0.7 V
CC
—
0.05 V
CC
V
CC
2.5V
V
CC
< 2.5V
V
CC
2.5V
(Note 1)
D5
D6
D7
D8
D9
D10
D11
V
OL
I
LI
I
LO
C
IN
,
C
OUT
I
CC
read
I
CCS
—
—
—
—
—
—
—
—
—
—
—
—
0.1
0.05
0.01
—
0.40
±1
±1
10
3
400
1
5
V
A
A
pF
mA
A
A
A
I
OL
= 3.0 mA, V
CC
= 4.5V
I
OL
= 2.1 mA, Vcc = 2.5V
V
IN
= V
SS
or V
CC
V
OUT
= V
SS
or V
CC
V
CC
= 5.0V
(Note 1)
T
A
= 25°C, F
CLK
= 1 MHz
V
CC
= 5.5V, SCL = 400 kHz
Industrial
Automotive
SDA = SCL = V
CC
= 5.5V
A0, A1, A2, WP = V
SS
I
CC
write
Operating current
Standby current
Note 1:
2:
This parameter is periodically sampled and not 100% tested.
Typical measurements taken at room temperature.
DS21713M-page 2
2002-2012 Microchip Technology Inc.
24AA32A/24LC32A
TABLE 1-2:
AC CHARACTERISTICS
Industrial (I):
Automotive (E):
Characteristic
Clock Frequency
Clock High Time
Clock Low Time
SDA and SCL Rise Time
(Note 1)
SDA and SCL Fall Time
Start Condition Hold Time
Start Condition Setup Time
Data Input Hold Time
Data Input Setup Time
Stop Condition Setup Time
WP Setup Time
WP Hold Time
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 V
IH
Minimum to V
IL
Maximum
Input Filter Spike Suppression
(SDA and SCL pins)
Write Cycle Time (byte or
page)
Endurance
Min.
—
—
600
4000
1300
4700
—
—
—
600
4000
600
4700
0
100
250
600
4000
600
4000
1300
4700
—
—
1300
4700
20+0.1C
B
—
—
—
1M
Max.
400
100
—
—
—
—
300
1000
300
—
—
—
—
—
—
—
—
—
—
—
—
—
900
3500
—
—
250
250
50
5
—
T
A
= -40°C to +85°C, V
CC
= +1.7V to +5.5V
T
A
= -40°C to +125°C, V
CC
= +2.5V to +5.5V
Units
kHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Conditions
2.5V
V
CC
5.5V
1.7V
V
CC
2.5V
(24AA32A)
2.5V
V
CC
5.5V
1.7V
V
CC
2.5V
(24AA32A)
2.5V
V
CC
5.5V
1.7V
V
CC
2.5V
(24AA32A)
2.5V
V
CC
5.5V
1.7V
V
CC
2.5V
(24AA32A)
(Note 1)
2.5V
V
CC
5.5V
1.7V
V
CC
2.5V
(24AA32A)
2.5V
V
CC
5.5V
1.7V
V
CC
2.5V
(24AA32A)
(Note 2)
2.5V
V
CC
5.5V
1.7V
V
CC
2.5V
(24AA32A)
2.5V
V
CC
5.5V
1.7V
V
CC
2.5V
(24AA32A)
2.5V
V
CC
5.5V
1.7V
V
CC
< 2.5V
(24AA32A)
2.5V
V
CC
5.5V
1.7V
V
CC
< 2.5V
(24AA32A)
2.5V
V
CC
5.5V
1.7V
V
CC
2.5V
(24AA32A)
2.5V
V
CC
5.5V
1.7V
V
CC
2.5V
(24AA32A)
2.5V
V
CC
5.5V
1.7V
V
CC
2.5V
(24AA32A)
(Notes 1 and 3)
—
AC CHARACTERISTICS
Param.
Symbol
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
F
CLK
T
HIGH
T
LOW
T
R
T
F
T
HD
:
STA
T
SU
:
STA
T
HD
:
DAT
T
SU
:
DAT
T
SU
:
STO
T
SU
:
WP
T
HD
:
WP
T
AA
T
BUF
15
16
17
18
Note 1:
2:
3:
4:
T
OF
T
SP
T
WC
—
ns
ns
ms
cycles Page mode, 25°C, V
CC
½
5.5V
(Note 4)
Not 100% tested. C
B
= total capacitance of one bus line in pF.
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.
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.
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 web site at
www.microchip.com.
2002-2012 Microchip Technology Inc.
DS21713M-page 3
24AA32A/24LC32A
FIGURE 1-1:
BUS TIMING DATA
5
4
2
D4
SCL
SDA
IN
7
6
16
3
8
9
10
13
SDA
OUT
(protected)
(unprotected)
14
WP
11
12
FIGURE 1-2:
BUS TIMING START/STOP
D4
SCL
7
SDA
6
10
Start
Stop
DS21713M-page 4
2002-2012 Microchip Technology Inc.
24AA32A/24LC32A
2.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1:
PIN FUNCTION TABLE
Rotated
DFN
(1)
TDFN
(1)
MSOP SOT-23 CS
TSSOP
3
4
5
6
7
8
1
2
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
—
—
—
2
3
1
5
4
—
—
—
2
5
4
3
1
Description
Chip Address Input
Chip Address Input
Chip Address Input
Ground
Serial Address/Data I/O
Serial Clock
Write-Protect Input
+1.7V to 5.5V Power Supply
Name PDIP SOIC SOIJ TSSOP
A0
A1
A2
V
SS
SDA
SCL
WP
V
CC
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
Note 1:
The exposed pad on the DFN/TDFN packages can be connected to V
SS
or left floating.
2.1
A0, A1, A2 Chip Address Inputs
2.3
Serial Clock (SCL)
The A0, A1 and A2 inputs are used by the 24XX32A for
multiple device operation. The levels on these inputs
are compared with the corresponding bits in the slave
address. The chip is selected if the comparison is true.
Up to eight devices may be connected to the same bus
by using different Chip Select bit combinations. These
inputs must be connected to either V
CC
or V
SS
.
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. Address
pins are not available in the SOT-23 and chip scale
packages.
The SCL input is used to synchronize the data transfer
to and from the device.
2.4
Write-Protect (WP)
This pin must be connected to either V
SS
or V
CC
. If tied
to V
SS
, write operations are enabled. If tied to V
CC
,
write operations are inhibited but read operations are
not affected.
2.2
Serial Data (SDA)
SDA 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 k for 100 kHz, 2 k for
400 kHz)
For normal data transfer, SDA is allowed to change
only during SCL low. Changes during SCL high are
reserved for indicating Start and Stop conditions.
2002-2012 Microchip Technology Inc.
DS21713M-page 5
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
