24AA256
器件描述：256K I 2 C ⑩ CMOS Serial EEPROM
器件厂商：MICROCHIP [Microchip Technology]
文件大小：181.84KB，共12页
Sponsor by e络盟器件资料摘要：
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1998 Microchip Technology Inc. DS21203C-page 1
M
24AA256/24LC256
DEVICE SELECTION TABLE
FEATURES
• Low power CMOS technology
- Maximum write current 3 mA at 5.5V
- Maximum read current 400
m
A 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
• Schmitt trigger inputs for noise suppression
• 100,000 erase/write cycles guaranteed
• Electrostatic discharge protection > 4000V
• Data retention > 200 years
• 8-pin PDIP and SOIC (208 mil) packages
• Temperature ranges:
DESCRIPTION
The Microchip Technology Inc. 24AA256/24LC256
(24xx256*) is a 32K x 8 (256K 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 256K boundary. Functional address
lines allow up to eight devices on the same bus, for up
to 2 Mbit address space. This device is available in the
standard 8-pin plastic DIP, and 8-pin SOIC (208 mil)
packages.
PACKAGE TYPE
BLOCK DIAGRAM
Part
Number
V
CC
Range
Max Clock
Frequency
Temp
Ranges
24AA256 1.8-5.5V 400 kHz
†
I
24LC256 2.5-5.5V 400 kHz
‡
I, E
†
100 kHz for V
CC
< 2.5V.
‡
100 kHz for E temperature range.
- Industrial (I): -40
C to +85
C
- Automotive (E): -40
C to +125
C
A0
A1
A2
Vss
Vcc
WP
SCL
SDA
1
2
3
4
8
7
6
5
24xx256
PDIP
A0
A1
A2
VSS
VCC
WP
SCL
SDA
24xx256
1
2
3
4
8
7
6
5
SOIC
HV GENERATOR
EEPROM
ARRAY
PAGE LATCHES
YDEC
XDEC
SENSE AMP
R/W CONTROL
MEMORY
CONTROL
LOGIC
I/O
CONTROL
LOGIC
A0…A2
SDA
SCL
VCC
VSS
WP
I/O
256K I
2
C
™
CMOS Serial EEPROM
I
2
C is a trademark of Philips Corporation.
*24xx256 is used in this document as a generic part number for the 24AA256/24LC256 devices.
1998 Microchip Technology Inc. DS21203C-page 1
M
24AA256/24LC256
DEVICE SELECTION TABLE
FEATURES
• Low power CMOS technology
- Maximum write current 3 mA at 5.5V
- Maximum read current 400
m
A 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
• Schmitt trigger inputs for noise suppression
• 100,000 erase/write cycles guaranteed
• Electrostatic discharge protection > 4000V
• Data retention > 200 years
• 8-pin PDIP and SOIC (208 mil) packages
• Temperature ranges:
DESCRIPTION
The Microchip Technology Inc. 24AA256/24LC256
(24xx256*) is a 32K x 8 (256K 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 256K boundary. Functional address
lines allow up to eight devices on the same bus, for up
to 2 Mbit address space. This device is available in the
standard 8-pin plastic DIP, and 8-pin SOIC (208 mil)
packages.
PACKAGE TYPE
BLOCK DIAGRAM
Part
Number
V
CC
Range
Max Clock
Frequency
Temp
Ranges
24AA256 1.8-5.5V 400 kHz
†
I
24LC256 2.5-5.5V 400 kHz
‡
I, E
†
100 kHz for V
CC
< 2.5V.
‡
100 kHz for E temperature range.
- Industrial (I): -40
C to +85
C
- Automotive (E): -40
C to +125
C
A0
A1
A2
Vss
Vcc
WP
SCL
SDA
1
2
3
4
8
7
6
5
24xx256
PDIP
A0
A1
A2
VSS
VCC
WP
SCL
SDA
24xx256
1
2
3
4
8
7
6
5
SOIC
HV GENERATOR
EEPROM
ARRAY
PAGE LATCHES
YDEC
XDEC
SENSE AMP
R/W CONTROL
MEMORY
CONTROL
LOGIC
I/O
CONTROL
LOGIC
A0…A2
SDA
SCL
VCC
VSS
WP
I/O
256K I
2
C
™
CMOS Serial EEPROM
I
2
C is a trademark of Philips Corporation.
*24xx256 is used in this document as a generic part number for the 24AA256/24LC256 devices.