24AA256/24LC256/24FC256
2
256K I C CMOS Serial EEPROM
Temperature Ranges:
Device Selection Table
- Industrial (I): -40C to +85 C
Part VCC Max. Clock Temp.
- Automotive (E): -40C to +125C
Number Range Frequency Ranges
(1) Description:
24AA256 1.7-5.5V 400 kHz I, E
24LC256 2.5-5.5V 400 kHz I, E The Microchip Technology Inc. 24AA256/24LC256/
(2)
24FC256 (24XX256*) is a 32K x 8 (256 Kbit) Serial
24FC256 1.7-5.5V 1 MHz I
Electrically Erasable PROM, capable of operation
Note 1: 100 kHz for VCC < 2.5V.
across a broad voltage range (1.7V to 5.5V). It has
2: 400 kHz for VCC < 2.5V.
been developed for advanced, low-power applications
such as personal communications or data acquisition.
Features:
This device also has a page write capability of up to 64
bytes of data. This device is capable of both random
Single Supply with Operation Down to 1.7V for
and sequential reads up to the 256K boundary.
24AA256 and 24FC256 Devices, 2.5V for
24LC256 Devices Functional address lines allow up to eight devices on
the same bus, for up to 2 Mbit address space. This
Low-Power CMOS Technology:
device is available in the standard 8-pin plastic DIP,
- Read current: 400 uA max. at 5.5V, 400 kHz
SOIC, SOIJ, TSSOP, MSOP, DFN and TDFN pack-
- Standby current: 1 uA max. at 3.6V, I-temp
ages. The 24AA256 is also available in the 8-lead Chip
2
2-Wire Serial Interface, I C Compatible
Scale package.
Cascadable up to Eight Devices
Block Diagram
Schmitt Trigger Inputs for Noise Suppression
Output Slope Control to Eliminate Ground Bounce
A0 A1A2 WP
HV Generator
100 kHz and 400 kHz Clock Compatibility
Page Write Time 5 ms Max.
I/O
Self-Timed Erase/Write Cycle Memory
EEPROM
Control
Control XDEC
Array
64-Byte Page Write Buffer
Logic
Logic
Hardware Write-Protect
Page Latches
ESD Protection >4000V
I/O
More than One Million Erase/Write Cycles
SCL
YDEC
Data Retention >200 years
SDA
Factory Programming Available
Packages Include 8-lead PDIP, SOIC, SOIJ, DFN,
VCC
TDFN, TSSOP and MSOP
VSS Sense Amp.
RoHS Compliant
R/W Control
Package Types
(1)
PDIP/SOIC/SOIJ (2)
TSSOP/MSOP DFN/TDFN
CS (Chip Scale)
VCC A1 A0
A0 1 8 VCC
A0 1 8 VCC
1 8
A0 VCC
12
3
A1 2 7 WP
A1 2 7 WP
2 7
A1 WP
WP 45 A2
A2 3 6 SCL
6 7 8
A2 3 6 SCL
3 6
A2
SCL
SS 4 5 SDA SCL VSS
V SDA
VSS 4 5 SDA
4 5
VSS SDA
(TOP DOWN VIEW,
BALLS NOT VISIBLE)
Note 1: * Pins A0 and A1 are no connects for the MSOP package only.
Note 2: Available in I-temp, AA only.
*24XX256 is used in this document as a generic part number for the 24AA256/24LC256/24FC256 devices.
1998-2013 Microchip Technology Inc. DS20001203U-page 1
24XX256
24XX256
24XX25624AA256/24LC256/24FC256
1.0 ELECTRICAL CHARACTERISTICS
()
Absolute Maximum Ratings
VCC.............................................................................................................................................................................6.5V
All inputs and outputs w.r.t. VSS ......................................................................................................... -0.6V to VCC +1.0V
Storage temperature ...............................................................................................................................-65C to +150C
Ambient temperature with power applied................................................................................................-40C to +125C
ESD protection on all pins 4kV
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 these or any other conditions above those
indicated in the operational listings of this specification is not implied. Exposure to Absolute Maximum Rating
conditions for extended periods may affect device reliability.
TABLE 1-1: DC CHARACTERISTICS
Electrical Characteristics:
DC CHARACTERISTICS Industrial (I): VCC = +1.7V to 5.5V TA = -40C to +85C
Automotive (E): VCC = +1.7V to 5.5V TA = -40C to +125C
Param.
Sym. Characteristic Min. Max. Units Conditions
No.
A0, A1, A2, SCL, SDA
and WP pins:
D1 VIH High-level input voltage 0.7 VCC V
D2 VIL Low-level input voltage 0.3 VCC V VCC 2.5V
0.2 VCC V VCC < 2.5V
D3 VHYS Hysteresis of Schmitt CC VVCC 2.5V (Note)
0.05 V
Trigger inputs
(SDA, SCL pins)
D4 VOL Low-level output voltage 0.40 V IOL = 3.0 mA @ VCC = 4.5V
IOL = 2.1 mA @ VCC = 2.5V
D5 ILI Input leakage current 1 AVIN = VSS or VCC, WP = VSS
VIN = VSS or VCC, WP = VCC
D6 ILO Output leakage current 1 AVOUT = VSS or VCC
D7 CIN, Pin capacitance 10 pFVCC = 5.0V (Note)
COUT (all inputs/outputs) TA = 25C, FCLK = 1 MHz
D8 ICC Read Operating current 400 AVCC = 5.5V, SCL = 400 kHz
ICC Write 3 mA VCC = 5.5V
D9 ICCS Standby current 1.5 ATA = -40C to +85C
SCL = SDA = VCC = 5.5V
A0, A1, A2, WP = VSS
1 ATA = -40C to +85C
SCL = SDA = VCC = 3.6V
A0, A1, A2, WP = VSS
5 ATA = -40C to +125C
SCL = SDA = VCC = 5.5V
A0, A1, A2, WP = VSS
Note: This parameter is periodically sampled and not 100% tested.
DS20001203U-page 2 1998-2013 Microchip Technology Inc.