24AA01/24LC01B
1K I2C™ Serial EEPROM
Device Selection Table
Part
Number
VCC
Range
Max. Clock
Frequency
24AA01
1.7-5.5
400 kHz(1)
24LC01B
2.5-5.5
400 kHz
Note 1:
Description:
Temp.
Ranges
I
I, E
100 kHz for VCC <2.5V.
Features:
• Single Supply with Operation down to 1.7V for
24AAXX Devices, 2.5V for 24LCXX Devices
• Low-Power CMOS Technology:
- Read current 1 mA, max.
- Standby current 1 μA, max. (I-temp)
• 2-Wire Serial Interface, I2C™ Compatible
• Schmitt Trigger inputs for Noise Suppression
• Output Slope Control to eliminate Ground Bounce
• 100 kHz and 400 kHz Compatibility
• Page Write Time 3 ms, typical
• Hardware Write-Protect
• ESD Protection >4,000V
• More than 1 Million Erase/Write Cycles
• Data Retention >200 Years
• Factory Programmable Available
• Packages include 8-lead PDIP, SOIC, TSSOP,
DFN, TDFN, MSOP, 5-lead SOT-23 and SC-70
• Pb-free and RoHS Compliant
• Temperature Ranges:
- Industrial (I): -40°C to +85°C
- Automotive (E): -40°C to +125°C
The Microchip Technology Inc. 24AA01/24LC01B
(24XX01*) is a 1 Kbit Electrically Erasable PROM. The
device is organized as one block of 128 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 μA and 1 mA, respectively. The
24XX01 also has a page write capability for up to 8
bytes of data. The 24XX01 is available in the standard
8-pin PDIP, surface mount SOIC, TSSOP, 2x3 DFN,
2x3 TDFN and MSOP packages, and is also available
in the 5-lead SOT-23 and SC-70 packages.
Package Types
SOIC, TSSOP
PDIP, MSOP
A0
1
8
VCC
A0
1
8
VCC
A1
2
7
WP
A1
2
7
WP
A2
3
6
SCL
A2
3
6
SCL
VSS
4
5
SDA VSS
4
5
SDA
SOT-23/SC-70
1
SCL
5
DFN/TDFN
WP
A0 1
A1 2
Vss
2
SDA
3
Note:
A2 3
VSS 4
4
8 VCC
7 WP
6 SCL
5 SDA
Vcc
Pins A0, A1 and A2 are not used by the 24XX01 (no
internal connections).
Block Diagram
WP
I/O
Control
Logic
Memory
Control
Logic
HV Generator
XDEC
EEPROM
Array
Page Latches
I/O
SCL
YDEC
SDA
VCC
VSS
© 2009 Microchip Technology Inc.
Sense Amp.
R/W Control
DS21711J-page 1
24AA01/24LC01B
TABLE 1-2:
AC CHARACTERISTICS
AC CHARACTERISTICS
Param.
No.
Sym.
Characteristic
Industrial (I):
TA = -40°C to +85°C, VCC = +1.7V to +5.5V
Automotive (E): TA = -40°C to +125°C, VCC = +2.5V to +5.5V
Min.
Typ.
Max.
Units
Conditions
1
FCLK
Clock frequency
—
—
—
—
400
100
kHz
2.5V ≤ VCC ≤ 5.5V
1.7V ≤ VCC < 2.5V (24AA01)
2
THIGH
Clock high time
600
4000
—
—
—
—
ns
2.5V ≤ VCC ≤ 5.5V
1.7V ≤ VCC <2.5V (24AA01)
3
TLOW
Clock low time
1300
4700
—
—
—
—
ns
2.5V ≤ VCC ≤ 5.5V
1.7V ≤ VCC < 2.5V (24AA01)
4
TR
SDA and SCL rise time
(Note 1)
—
—
—
—
300
1000
ns
2.5V ≤ VCC ≤ 5.5V
1.7V ≤ VCC < 2.5V (24AA01)
5
TF
SDA and SCL fall time
—
—
—
300
ns
(Note 1)
6
THD:STA
Start condition hold time
600
4000
—
—
—
—
ns
2.5V ≤ VCC ≤ 5.5V
1.7V ≤ VCC < 2.5V (24AA01)
7
TSU:STA
Start condition setup
time
600
4700
—
—
—
—
ns
2.5V ≤ VCC ≤ 5.5V
1.7V ≤ VCC < 2.5V (24AA01)
8
THD:DAT
Data input hold time
0
—
—
—
ns
(Note 2)
9
TSU:DAT
Data input setup time
100
250
—
—
—
—
ns
2.5V ≤ VCC ≤ 5.5V
1.7V ≤ VCC < 2.5V (24AA01)
10
TSU:STO
Stop condition setup
time
600
4000
—
—
—
—
ns
2.5V ≤ VCC ≤ 5.5V
1.7V ≤ VCC < 2.5V (24AA01)
11
TAA
Output valid from clock
(Note 2)
—
—
—
—
900
3500
ns
2.5V ≤ VCC ≤ 5.5V
1.7V ≤ VCC < 2.5V (24AA01)
12
TBUF
Bus free-time: Time the
bus must be free before
a new transmission can
start
1300
4700
—
—
—
—
ns
2.5V ≤ VCC ≤ 5.5V
1.7V ≤ VCC < 2.5V (24AA01)
13
TOF
Output fall time from VIH
minimum to VIL
maximum
20+0.1CB
—
—
—
250
250
ns
2.5V ≤ VCC ≤ 5.5V
1.7V ≤ VCC < 2.5V (24AA01)
14
TSP
Input filter spike
suppression
(SDA and SCL pins)
—
—
50
ns
(Notes 1 and 3)
15
TWC
Write cycle time
(byte or page)
—
—
5
ms
—
16
—
Endurance
1M
—
—
Note 1:
2:
3:
4:
cycles 25°C, (Note 4)
Not 100% tested. CB = 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 TSP and VHYS specifications are due to new Schmitt Trigger inputs which provide improved
noise spike suppression. This eliminates the need for a TI 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 from Microchip’s web site
at www.microchip.com.
© 2009 Microchip Technology Inc.
DS21711J-page 3
